Patent application number | Description | Published |
20120039179 | METHOD AND APPARATUS FOR SUPPORTING MULTIPLE CARRIERS - A method and apparatus supporting multiple carriers is provided. A user equipment receives a self-control format indicator (CFI) indicating a size of a control region of a first carrier by using the first carrier. The user equipment receives downlink control information (DCI) comprising a cross-CFI indicating a size of a control region of a second carrier over a first downlink control channel in the control region of the first carrier. The user equipment monitors a second downlink control channel in the control region of the second carrier. | 02-16-2012 |
20120113944 | METHOD FOR TRANSMITTING CONTROL INFORMATION AND DEVICE THEREFOR - The present invention relates to a wireless communication system. More specifically, the present invention relates to a method for transmitting uplink control information and a device therefor, and the method comprises the steps of: selecting, from a plurality of uplink control channel resources, one uplink control channel resource corresponding to a plurality of HARQ-ACKs; and transmitting bit values corresponding to said plurality of HARQ-ACKs by using the selected uplink control channel resource. | 05-10-2012 |
20120294273 | METHOD AND DEVICE FOR TRANSMITTING EXTENDED UPLINK CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method for a base station receiving uplink control information from a terminal, according to one embodiment of the present invention, comprises the following steps: transmitting allocated information which is allocated to the terminal from a plurality of physical uplink control channel (PUCCH) transmission resources, each of the PUCCH transmission resource comprising a combination of an information resource and a reference signal (RS) resource, including a plurality of RS resources; and receiving confirmation response information, RS, and additional control information among the plurality of PUCCH transmission resources, which are transmitted from the terminal through a specific information resource or a specific RS resource, wherein the additional control information can be indicated based on the selection of the specific RS resource which transmits a RS among a plurality of RS resources. | 11-22-2012 |
20120307771 | METHOD AND APPARATUS FOR ALLOCATION OF DISCONTINUOUS UPLINK RESOURCE - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and apparatus for transmitting an uplink signal in a wireless communication system, wherein the method for transmitting an uplink signal in a wireless communication system comprises: a step of receiving a control channel signal containing resource allocation information; and a step of transmitting an uplink signal in accordance with the control channel signal, wherein the resource allocation information has a combination index r to be used for indicating two sets of resource blocks, and each set of resource blocks includes one or more continuous resource blocks. | 12-06-2012 |
20120320805 | METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and apparatus for transmitting uplink control information when TDD and a plurality of cells are configured, and comprises the following steps: receiving one or more of at least one PDCCH signal and at least one PDSCH signal; generating for each of the cells reception reply information on one or more of the at least one PDCCH signal and the at least one PDSCH signal; and transmitting the reception reply information for each of the plurality of cells which are connected. | 12-20-2012 |
20120320859 | METHOD AND DEVICE FOR TRANSMITTING SOUNDING REFERENCE SIGNAL AND EXTENDED UPLINK CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more particularly, discloses a method and a device for transmitting a sounding reference signal and extended uplink control information in a wireless communication system. A method for a terminal transmitting the uplink control information through a physical uplink control channel in the wireless communication system, according to one embodiment of the present invention, comprises the following steps: creating a block by multiplying a modulation symbol, which shows the uplink control information, to a circular shift sequence, and creating a N | 12-20-2012 |
20130021980 | METHOD FOR TRANSMITTING CHANNEL STATE INFORMATION IN WIRELESS ACCESS SYSTEM - The present invention provides various methods for transmitting channel state information relative to one or more serving cells in a carrier-coupled environment, and devices for supporting the same. As one embodiment of the present invention, a method for reporting channel state information (CSI) in a wireless access system that supports carrier coupling comprises the steps of: allowing a terminal to receive information related to a CSI report mode for one or more serving cells from a base station; and allowing the terminal to report the channel state information (CSI) on the one or more serving cells to the base station by considering the CSI report mode. In this case, if first type CSI for a first serving cell and second type CSI for a second serving cell are transmitted on the same subframe, the terminal can report CSI for one serving cell only, to the base station, according to priorities of CSI report types related to the CSI report mode. | 01-24-2013 |
20130044653 | METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and apparatus for transmitting uplink control information in the event that a plurality of cells is constructed, wherein the method comprises the following steps: receiving a PDCCH and/or a PDSCH; generating acknowledgement information on the PDCCH and/or PDSCH; and, if acknowledgement information transmission timing and channel state information transmission timing collide with each other, dropping the channel state information and transmitting only the acknowledgement information, or transmitting the acknowledgement information and the channel state information together in accordance with a predetermined condition. | 02-21-2013 |
20130088973 | METHOD FOR ALLOCATING CONTROL CHANNEL AND DEVICE THEREFOR - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method for allowing a terminal to receive a PDCCH in a wireless communication system using multiple carriers and a device therefore, and the method comprises the steps of: receiving a plurality of search spaces through a control region on a subframe, wherein each search space includes a plurality of PDCCH candidate sets, and each search space corresponds to each carrier; and monitoring PDCCH candidates for the PDCCH, wherein the intervals between the respective search spaces within said control region are determined by considering the ratios between the number of scheduled carriers and the number of CCEs within the control region. | 04-11-2013 |
20130089063 | METHOD AND DEVICE FOR UPLINK RESOURCE ALLOCATION - The present invention relates to a wireless communication system. In more detail, the present invention relates to a method for transmitting an uplink in a wireless communication system and to a device therefore, wherein the method for transmitting an uplink in a wireless communication system comprises the steps of: receiving a control channel signal including resource allocation information; and transmitting an uplink signal according to control channel signal. | 04-11-2013 |
20130094410 | METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION - The present invention relates to a wireless communication system. Specifically, the present invention relates to a method and apparatus for transmitting uplink control information when a plurality of cells is configured. The method includes receiving at least one of PDCCH(s) and PDSCH(s), generating reception response information about at least one of the PDCCH(s) and the PDSCH(s), and transmitting the reception response information through a PUCCH on an SR subframe. | 04-18-2013 |
20130100866 | METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and apparatus for transmitting uplink control information in the event of a plurality of cell, wherein the method comprises the following steps; receiving a PPCCH and/or a PDSCH; generating reception acknowledgement information for said PDCCH and/or PDSCH: and transmitting the reception acknowledgement information in an SR subframe via a PUCCH. | 04-25-2013 |
20130121302 | METHOD AND DEVICE FOR TRANSMITTING CONTROL INFORMATION - The present invention relates to a wireless communication system. More specifically, the present invention relates to a method and device for transmitting uplink control information when a plurality of cells are configured in a wireless communication system, the method comprising the steps of: generating a UCI; and determining a PUCCH resource for transmitting the UCI. If the reception response information and channel state information are triggered in the same subframe, only a first UCI generated from the reception response information is transmitted through a first PUCCH. If the reception response information and scheduling request information are triggered in the same subframe, a second UCI generated by jointly coding the reception response information and the scheduling request information is transmitted through a second PUCCH. The resource used for a reference signal for demodulating the first or second PUCCH is allocated in consideration of the UCI transmitted on PUCCH. | 05-16-2013 |
20130128813 | METHOD FOR TRANSMITTING CHANNEL STATE INFORMATION IN WIRELESS ACCESS SYSTEM - The present invention provides various methods for transmitting channel state information relative to one or more serving cells in a carrier-coupled environment, and devices for supporting the same. As one embodiment of the present invention, a method for reporting channel state information (CSI) in a wireless access system that supports carrier coupling comprises the steps of: allowing a terminal to receive information related to a CSI report mode for one or more serving cells from a base station; and allowing the terminal to report the channel state information (CSI) on the one or more serving cells to the base station by considering the CSI report mode. In this case, if first type CSI for a first serving cell and second type CSI for a second serving cell are transmitted on the same subframe, the terminal can report CSI for one serving cell only, to the base station, according to priorities of CSI report types related to the CSI report mode. | 05-23-2013 |
20130155868 | METHOD AND APPARATUS FOR MONITORING CONTROL CHANNEL IN WIRELESS COMMUNICATION SYSTEM - The present disclosure provides a method for monitoring a control channel in a wireless access system, including setting the number of maximum blind decoding times for each user equipment (UE)-specific search space and a common search space to which the control channel is transmitted; monitoring a plurality of candidate control channels in each of the search spaces, based on the number of maximum blind decoding times, set in the respective search spaces; and receiving downlink control information through a control channel which has succeeded in the blinding decoding among the plurality of candidate control channels, wherein the common search space is allocated to at least one carrier group that includes at least one component carrier. | 06-20-2013 |
20130163487 | METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and apparatus for transmitting uplink control information in the event of a plurality of cell, wherein the method comprises the following steps: receiving a PDCCH and/or a PDSCH; generating reception acknowledgement information for said PDCCH and/or PDSCH; and transmitting the reception acknowledgement information in an SR subframe via a PUCCH. | 06-27-2013 |
20130170463 | METHOD AND DEVICE FOR TRANSMITTING CONTROL INFORMATION - The present invention relates to a wireless communication system. Specifically, the present invention relates to a method for transmitting uplink control information and to an apparatus therefor. The present invention relates to a method comprising the steps of: selecting one uplink control channel resource corresponding to a plurality of HARQ-ACKs from among a plurality of uplink control channel resources; and transmitting a bit value corresponding to the plurality of HARQ-ACKs using the selected uplink control channel resource, and to an apparatus therefor. | 07-04-2013 |
20130176929 | METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and apparatus for transmitting uplink control information. The method for transmitting uplink control information comprises: a step of selecting one uplink control channel resource corresponding to a plurality of HARQ-ACKs from among a plurality of uplink control channel resources, and a step of transmitting complex values corresponding to the plurality of HARQ-ACKs using the selected uplink control channel resource. | 07-11-2013 |
20130182675 | METHOD AND DEVICE FOR TRANSMITTING CONTROL INFORMATION - The present invention relates to a wireless communication system. Specifically, the present invention relates to a method for transmitting uplink control information and to an apparatus for the same. The present invention relates to a method and to a device for said method which comprises the steps of selecting one uplink control channel resource corresponding to a plurality of HARQ-ACKs from among a plurality of uplink control channel resources, and transmitting a bit value corresponding to the plurality of HARQ-ACKs by using the selected uplink control channel resource. | 07-18-2013 |
20130195063 | METHOD FOR TRANSMITTING CONTROL INFORMATION AND DEVICE THEREFOR - The present invention relates to a wireless communication system. More specifically, the present invention relates to a method for transmitting uplink control information in an environment comprising a plurality of cells and to a device therefore, and relates to a method which comprises: receiving one, either or both of one or more PDCCH signals and one or more PDSCH signals; and generating entire received response information with respect to the one, either or both of the one or more PDCCH signals and one or more PDSCH signals, wherein portions of the received response information constituting the entire received response information are generated separately for each cell and each subframe. | 08-01-2013 |
20130208692 | METHOD AND APPARATUS FOR TRANSMITTING ACK/NACK FOR DOWNLINK TRANSMISSION IN WIRELESS COMMUNICATION SYSTEM - A wireless communication system and a method and apparatus for transmitting ACK/NACK for downlink transmission in a wireless communication system are disclosed. The method for transmitting ACK/NACK information for a downlink transmission in a receiver of a wireless communication system includes being configured with N physical uplink control channel (PUCCH) resources respectively having indexes 0, 1, 2, . . . , and N−1 by a higher layer, receiving the downlink transmission from a transmitter in a downlink subframe set including M (108-15-2013 | |
20130215807 | METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION - A method and apparatus for transmitting uplink control information in an FDD wireless communication system, in which a plurality of cells are arranged, are provided. The method includes: receiving one or more PDCCH signals and one or more PDSCH signals corresponding to the PDCCH signals in downlink subframe N; generating ACK/NACK information on the basis of the result of the acknowledgement of receipt of at least the one or more PDSCH signals; and transmitting the ACK/NACK information through a PUCCH. If a predetermined condition is satisfied, at least one of the PDCCH signals includes information indicating a DAI value, and if the predetermined condition is not satisfied, at least one of the PDCCH signals includes information indicating a value of a PUCCH resource for the ACK/NACK information. The information indicating the DAI value and the information indicating the value of the PUCCH resource are provided in the same field. | 08-22-2013 |
20130229993 | METHOD AND DEVICE FOR UPLINK RESOURCE ALLOCATION - The present invention relates to a wireless communication system. In more detail, the present invention relates to a method for transmitting an uplink in a wireless communication system and to a device therefore, wherein the method for transmitting an uplink in a wireless communication system comprises the steps of: receiving a control channel signal including resource allocation information; and transmitting an uplink signal according to control channel signal. | 09-05-2013 |
20130242923 | METHOD FOR TRANSMITTING CONTROL INFORMATION AND A DEVICE THEREFOR - The present invention relates to a wireless communication system. More specifically, the present invention relates to a method for transmitting uplink control information and to a device therefor, and relates to a method comprising the steps of: selecting one uplink control channel resource corresponding to a plurality of HARQ-ACKs, from a plurality of uplink control channel resources; and transmitting a bit value corresponding to the plurality of HARQ-ACKs, by using the selected uplink control channel resource. The present invention also relates to a device for the method. | 09-19-2013 |
20130272172 | METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and apparatus for transmitting uplink control information in the event that a plurality of cells is constructed, wherein the method comprises the following steps: receiving a PDCCH and/or a PDSCH; generating acknowledgement information on the PDCCH and/or PDSCH; and, if acknowledgement information transmission timing and channel state information transmission timing collide with each other, dropping the channel state information and transmitting only the acknowledgement information, or transmitting the acknowledgement information, or transmitting the acknowledgement information and the channel state information together in accordance with a predetermined condition. | 10-17-2013 |
20130272261 | METHOD FOR MITIGATING INTER CELL INTERFERENCE AND DEVICE THEREFOR - The present invention relates to a wireless communication system. More specifically, the present invention relates to a method and a device therefor, wherein the method comprises the steps of: receiving a PDCCH signal that contains scheduling information from a base station on a first subframe; receiving a PDSCH signal corresponding to said PDCCH signal from said base station on a second subframe; and decoding said PDSCH signal, wherein an interval between said first subframe and said second subframe is varied. | 10-17-2013 |
20130286905 | METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and apparatus for transmitting uplink control information when TDD and a plurality of cells are configured, and comprises the following steps: receiving one or more of at least one PDCCH signal and at least one PDSCH signal; generating for each of the cells reception reply information on one or more of the at least one PDCCH signal and the at least one PDSCH signal; and transmitting the reception reply information for each of the plurality of cells which are connected. | 10-31-2013 |
20130322304 | TRANSMISSION METHOD AND RECEPTION METHOD FOR DOWNLINK SIGNAL, USER EQUIPMENT, AND BASE STATION - The present invention provides a DL grant transmission/reception measure for a cross-CC scheduling, when cells operating in different TDD DL-UL configurations from each other are merged. In addition, the present invention provides a measure for transmitting/receiving uplink ACK/NACK information for DL data transmitted according the DL grant. | 12-05-2013 |
20130322307 | METHOD FOR TRANSMITTING/RECEIVING SIGNAL AND DEVICE THEREFOR - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method for transmitting uplink control information and a device therefor, the method comprising the steps of: forming a plurality of serving cells each having different UL-DL configurations; receiving one or more signals requiring a HARQ-ACK response from M(M≧1) number of subframes; and executing the process for transmitting the HARQ-ACK response to the one or more signals in a specific subframe corresponding to the M number of subframes, wherein, only when the specific subframe is set as an uplink in all of the plurality of serving cells, the HARQ-ACK response to the one or more signals are transmitted through the specific subframe. | 12-05-2013 |
20130329686 | METHOD AND DEVICE FOR TRANSMITTING CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system. More specifically, the present invention relates to a method and a device therefor, wherein a method for receiving a downlink control channel in a communication device having a plurality of cells in a wireless communication system comprises the steps of: receiving a subframe containing a plurality of search space resources which are preset to transmit a plurality of downlink control channel candidates, wherein each search space resource corresponds to each cell; and monitoring said plurality of the control channel candidates from at least a portion of said plurality of the search space resources, for said downlink control channel, wherein among said plurality of the cells, if there are one or more specific cells in which downlink transmission is limited at said subframe, search space resources corresponding to said one or more specific cells are used to transmit downlink control channel candidates or downlink shared channels of other cells. | 12-12-2013 |
20130336198 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING A SIGNAL THROUGH A RELAY NODE IN A WIRELESS COMMUNICATION SYSTEM IN WHICH A CARRIER AGGREGATION METHOD IS APPLIED - The present invention relates to a method for transmitting and receiving a signal, using a macro base station, through a relay node in a wireless communication system in which a carrier aggregation method is applied. Specifically, the method comprises the steps of: receiving a downlink control channel in a first subframe of a main component carrier; and receiving a data channel on the first subframe and a second subframe after the first subframe, based on control information included in the downlink control channel, wherein the data channel is received through only one or through a plurality of sub-component carriers in the second subframe, and the control information includes a carrier identifier for identifying component carriers and/or a subframe identifier for identifying subframes. | 12-19-2013 |
20130336262 | METHOD FOR TRANSMITTING CONTROL INFORMATION AND APPARATUS THEREFOR - The present invention relates to a wireless communication system. Specifically, the present invention relates to a method for transmitting uplink control information and an apparatus therefore, which includes the steps of selecting one uplink control channel resource corresponding to a plurality of HARQ-ACKs from a plurality of uplink control channel resources, and transmitting bit values corresponding to the plurality of HARQ-ACKs using the selected uplink control channel resource. | 12-19-2013 |
20130343242 | METHOD FOR RECEIVING DOWNLINK CONTROL INFORMATION AND METHOD FOR TRANSMITTING SAME, USER EQUIPMENT AND BASE STATION - Abstract: The present invention relates to a wireless communication system. More particularly, the present invention, when cells each operating in different TDD DL-UL configurations are merged, provides a plan for setting a UL grant transmission/reception timing for a cross-CC scheduling. In addition, the present invention, according to the UL grant timing, provides a base station for transmitting UL grant to a user equipment, and a user equipment for receiving the UL grant from the base station. | 12-26-2013 |
20130343243 | METHOD FOR RECEIVING ACK(ACKNOWLEDGEMENT)/NACK (NEGATIVE ACK) INFORMATION AND METHOD FOR TRANSMITTING SAME, USER EQUIPMENT AND BASE STATION - The present invention relates to a wireless communication system. More particularly, the present invention, when cells each operating in different TDD DL-UL configurations are merged, provides a plan for setting a downlink ACK/NACK transmission/reception timing for a cross-CC scheduling. In addition, the present invention, according to the downlink ACK/NACK transmission/reception timing, provides a base station for transmitting a ACK/NACK channel to a user equipment, and a user equipment for receiving the ACK/NACK channel from the base station. | 12-26-2013 |
20140003303 | METHOD FOR TRANSMITTING/RECEIVING SIGNAL AND DEVICE THEREFOR | 01-02-2014 |
20140003392 | TRANSMISSION METHOD AND RECEPTION METHOD FOR UPLINK SIGNAL, USER EQUIPMENT, AND BASE STATION | 01-02-2014 |
20140016596 | METHOD AND APPARATUS FOR TRANSMITTING/RECEIVING DOWNLINK CONTROL CHANNEL IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more particularly, discloses a method and a downlink reception apparatus, in which at least one cell is set, for transmitting and receiving a downlink control channel. According to one embodiment of the present invention, the method for receiving the physical downlink control channel (PDCCH) by the downlink reception apparatus in which at least one cell is set, comprises: a step of receiving a virtual resource block (VRB) set setting information for a potential PDCCH transmission; and a step of monitoring the VRB set and demodulating the PDCCH, wherein information on the VRB set, with regard to a cell for which PDCCH non-crossed interleaving is set or to a cell for which the PDCCH demodulation is set, based on the downlink reception apparatus-specific reference signal, can be commonly defined for a first slot and a second slot in a downlink subframe. | 01-16-2014 |
20140022962 | METHOD FOR TRANSMITTING/RECEIVING SIGNAL AND DEVICE THEREFOR - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method for transmitting an uplink signal in a wireless communication system supporting a carrier merge, and a device therefor, the method comprising the steps of: setting a first cell having a first TDD UL-DL configuration and a second cell having a second TDD UL-DL configuration; receiving data through a DL subframe of the first cell; and transmitting reception response information on the data through a UL subframe of the second cell, wherein the relationship between the DL subframe and the UL subframe is determined by a parameter value set in a specific TDD UL-DL configuration inside a TDD UL-DL configuration set, and the specific TDD UL-DL configuration is the TDD UL-DL configuration having the least number of DL subframes from one or more TDD UL-DL configurations, in which subframes set as a DL in the first cell or the second cell are all set as DLs. | 01-23-2014 |
20140022963 | METHOD FOR TRANSMITTING/RECEIVING SIGNAL AND DEVICE THEREFOR - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method comprising: setting a first cell having a first TDD UL-DL configuration and a second cell having a second TDD UL-DL configuration; receiving a PHICH signal in a subframe #(n−L) of the first cell, or receiving a PDCCH signal in a subframe #(n−K) of the first cell; and transmitting a PUSCH signal in a subframe #n of the second cell, corresponding to the PHICH signal or the PDCCH signal, wherein the relationship between the subframes #(n−L), #(n−K), and #n is determined in consideration of a parameter value set in a specific TDD UL-DL configuration, which is the TDD UL-DL configuration having the least number of UL subframes from TDD UL-DL configuration(s), in which subframes set as UL in the first or second cell are all set as ULs. | 01-23-2014 |
20140022967 | METHOD FOR TRANSMITTING CONTROL INFORMATION AND APPARATUS FOR SAME - A wireless communication system is disclosed. A method for transmitting uplink control information in a wireless communication system supporting carrier aggregation and operating in TDD includes: generating a first HARQ-ACK (hybrid automatic repeat request-acknowledgement) set for a first cell using a value M; generating a second HARQ-ACK set for a second cell using the value M; and transmitting a bit value corresponding to a third HARQ-ACK set including the first HARQ-ACK set and the second HARQ-ACK set in an uplink subframe n, wherein M=max(M1, M2), max(M1, M2) representing a value being equal to or larger than not smaller between M1 and M2, wherein M1 corresponds to the number of downlink subframes corresponding to the uplink subframe n in the first cell, and M2 corresponds to the number of downlink subframes corresponding to the uplink subframe n in the second cell, wherein the first cell and the second cell have different UL-DL configurations. | 01-23-2014 |
20140036840 | METHOD AND APPARATUS FOR ALLOCATION OF DISCONTINUOUS UPLINK RESOURCE - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and apparatus for transmitting an uplink signal in a wireless communication system, wherein the method for transmitting an uplink signal in a wireless communication system comprises: a step of receiving a control channel signal containing resource allocation information; and a step of transmitting an uplink signal in accordance with the control channel signal, wherein the resource allocation information has a combination index r to be used for indicating two sets of resource blocks, and each set of resource blocks includes one or more continuous resource blocks. | 02-06-2014 |
20140056184 | METHOD FOR TRANSMITTING CONTROL INFORMATION AND APPARATUS FOR SAME - A wireless communication system is disclosed. A method for transmitting uplink control information in a wireless communication system supporting carrier aggregation and operating in TDD includes: generating a first HARQ-ACK (hybrid automatic repeat request—acknowledgement) set for a first cell using a value M; generating a second HARQ-ACK set for a second cell using the value M; and transmitting a bit value corresponding to a third HARQ-ACK set including the first HARQ-ACK set and the second HARQ-ACK set in an uplink subframe n, wherein M=max(M1, M2), max(M1, M2) representing a value being equal to or larger than not smaller between M1 and M2, wherein M1 corresponds to the number of downlink subframes corresponding to the uplink subframe n in the first cell, and M2 corresponds to the number of downlink subframes corresponding to the uplink subframe n in the second cell, wherein the first cell and the second cell have different UL-DL configurations. | 02-27-2014 |
20140056188 | METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method for receiving a downlink control signal in a TDD-based wireless communication system, and to an apparatus therefor. The method comprises receiving a downlink signal via a downlink interval in a specific frame including the downlink interval, a guard interval and an uplink interval. A combination of the downlink interval, the guard interval and the uplink interval is given using configuration information on the specific subframe. When the configuration information is given such that the length of the downlink interval is larger than a specific value, detecting a first type of PDCCH is performed in the specific subframe. When the configuration information is given such that the length of the downlink interval is equal to or smaller than the specific value, detecting the first type of PDCCH is skipped in the specific subframe. | 02-27-2014 |
20140056268 | METHOD AND APPARATUS FOR ALLOCATION OF DISCONTINUOUS UPLINK RESOURCE - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and apparatus for transmitting an uplink signal in a wireless communication system, wherein the method for transmitting an uplink signal in a wireless communication system comprises: a step of receiving a control channel signal containing resource allocation information; and a step of transmitting an uplink signal in accordance with the control channel signal, wherein the resource allocation information has a combination index r to be used for indicating two sets of resource blocks, and each set of resource blocks includes one or more continuous resource blocks. | 02-27-2014 |
20140078944 | METHOD FOR TRANSMITTING CONTROL INFORMATION AND APPARATUS THEREFOR - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method for transmitting uplink control information in a wireless communication system that supports carrier aggregation and operates in a TDD system, and to an apparatus therefor. The system comprises the steps of: generating a first set of hybrid automatic repeat request acknowledgement (HARQ-ACK) associated with a first component carrier (CC); generating a second set of HARQ-ACK associated with a second CC; and transmitting 4-bit information corresponding to the first set of HARQ-ACK and the second set of HARQ-ACK on a physical uplink shared channel (PUSCH). | 03-20-2014 |
20140086119 | METHOD FOR USER EQUIPMENT TRANSRECEIVING SIGNAL IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method for transceiving signals between a user equipment and a base station in a wireless communication system, and to an apparatus for same. More particularly, a method for the user equipment transceiving the signal in the wireless communication system, which is operated by a time division duplex (TDD), comprises the steps of: monitoring a physical downlink control channel (PDCCH) with respect to a special frame; and receiving a physical downlink shared channel (PDSCH) that corresponds to the PDCCH from the special subframe, when a PDCCH having downlink allocation information of the special subframe is detected, wherein the PDSCH is received by at least one orthogonal frequency division multiplexing (OFDM) symbol from a plurality of OFDM symbols that correspond to a defined guard period (GP) and an uplink pilot time slot (UpPTS) within the special subframe, according to a TDD uplink-downlink configuration. | 03-27-2014 |
20140086197 | DATA TRANSCEIVING METHOD AND APPARATUS FOR SAME - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and an apparatus in which a terminal receives downlink data in a wireless communication system. The method comprises: a step of receiving a control channel signal including resource allocation information through a specific time domain of a subframe having a plurality of time domains; and a step of receiving the downlink data through the downlink data channel resource domain scheduled by the resource allocation information within said specific time domain. In cases where the downlink data channel resource domain is overlapped with a common search space, the downlink data is received through the residual resource domain except the portion overlapped with the common search space from among the downlink data channel resource domain. | 03-27-2014 |
20140092793 | METHOD FOR SETTING SUBFRAME IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method for setting a subframe in a wireless communication system and to an apparatus for same. More particularly, the method for setting the subframe in the wireless communication system that is operated by a time division duplex (TDD), comprises the steps of: setting at least one uplink subframe and at least one downlink subframe according to an uplink-downlink (UL-DL) configuration; receiving resetting information with respect to a specific uplink subframe from the at least one uplink subframes; and setting the specific uplink subframe so as to include a first section for an uplink and a second section for a downlink. | 04-03-2014 |
20140092794 | METHOD FOR TRANSMITTING AND RECEIVING A SIGNAL, AND APPARATUS THEREFOR - The present invention relates to a wireless communication system. Specifically, a method for transmitting an uplink signal in a wireless communication system supporting carrier aggregation includes the steps of: setting a first cell of a first time division duplex (TDD) uplink (UL)-downlink (DL) configuration, and a second cell of a second TDD UL-DL configuration; receiving data over a DL subframe of the first cell; and transmitting a control signal over a UL subframe of the second cell in response to the received data, wherein a relationship of the DL subframe and UL subframe is determined by parameter values set in a specific TDD UL-DL configuration in a TDD WL-DL configuration set, the specific TDD UL-DL configuration has the minimum number of DL subframes from among one or more of TDD UL-DL configurations in which subframes set as a DL or X are all set as the DL in the first cell or the second cell, the subframes set as X have different subframe directions in the first cell and the second cell at a corresponding subframe timing, and the uses thereof are limited in either the first cell or the second cell. | 04-03-2014 |
20140092856 | METHOD FOR TRANSMITTING CONTROL INFORMATION AND APPARATUS FOR SAME - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method for transmitting uplink channel state information (CSI) in a wireless communication system that supports carrier aggregation, and to an apparatus for the method. The method for reporting CSI in a wireless communication system that supports carrier aggregation comprises the steps of: configuring a plurality of downlink component carriers (DL CCs); setting a CSI report mode on the plurality of DL CCs for each DL CC; and performing an operation for transmitting CSI according to the CSI report mode set on each DL CC. If a P-number of CSI overlap in the same subframe and a first condition is satisfied, a Q-number of CSI among the P-number of CSI are transmitted through a first physical channel, and if the P-number of SCI overlap in the same subframe and a second condition is satisfied, only an R-number of CSI among the P-number of CSI are transmitted through a second physical channel which is different from the first physical channel, wherein R is smaller than Q. | 04-03-2014 |
20140105076 | METHOD FOR TRANSMITTING CONTROL INFORMATION AND APPARATUS THEREFOR - The present invention relates to a wireless communication system. In more detail, the present invention relates to a method and device for transmitting uplink control information in a wireless communication system that supports carrier merging and operates in TDD, and the method comprises the following steps: receiving at least one or more than one PDCCH and more than one PDSCH from a plurality of downlink sub frames according to a UL-DL configuration: determining a bit number of reception response information on the at least one of more than one PDCCH and more than one PDSCH by using a value indicated by a predetermined 2-bit field in a DCI format for UL scheduling; and transmitting the reception response information through PUSCH corresponding to the DIC format. | 04-17-2014 |
20140105154 | METHOD FOR ALLOCATING A CONTROL CHANNEL AND APPARATUS THEREFOR - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method in which a terminal performs a process for determining a control channel allocation for a control channel, and to an apparatus for the method. The method comprises the steps of: monitoring, on a specific carrier, a common search space including a control channel candidate set for the control channel; and monitoring, on the specific carrier, a terminal-specific search space including the control channel candidate set for the control channel. In cases where the terminal is set to monitor a plurality of control channel candidates having the same radio network temporary identifier (RNTI), same information size, same first control channel resource, and same control channel resource aggregation level in the common search space and the terminal-specific search space, the control channel candidate that satisfies the above conditions is received only in the common search space. | 04-17-2014 |
20140105157 | METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system. More particularly, in a method for receiving a downlink signal in a wireless communication system and an apparatus for same, the present invention relates to a method and an apparatus for same, comprising the steps of: receiving a subframe including a plurality of OFDM symbols; monitoring a plurality of search spaces which are configured on the subframe, so as to receive a PDCCH which is indicated to a terminal; and performing an operation in accordance with a PDCCH which is detected when the PDCCH that is indicated to the terminal is detected, wherein each of the search spaces is configured on a first resource region and/or a second resource region, in accordance with a predetermined condition, and the first resource region and the second resource region are separated with a specific OFDM symbol as a boundary on a time domain. | 04-17-2014 |
20140105191 | METHOD OF TRANSMITTING CONTROL INFORMATION AND DEVICE FOR SAME - The present invention relates to a wireless communication system. In more detail, a method for performing HARQ (hybrid automatic repeat request) retransmission by a communication device in a wireless communication system, the method comprising: initially transmitting a data block to a Base Station (BS); attempting PDCCH (physical downlink control channel detection) in a predetermined time interval including a plurality of subframes after transmission of an uplink channel signal; and retransmitting the data block when a PDCCH signal indicating retransmission of the data block is detected in the predetermined time interval, wherein reception of a PHICH (physical hybrid ARQ indicator channel) corresponding to initial transmission of the data block is skipped. | 04-17-2014 |
20140112277 | METHOD FOR CONFIGURING RESOURCE FOR CARRIER AGGREGATION AND APPARATUS FOR SAME - The present invention relates to a wireless communication system. More particularly, the present invention related to a method for performing communication on a specific single secondary cell (SCell) in a wireless communication system supporting carrier aggregation and to an apparatus for same, wherein the method comprises the following steps: receiving setting information on a plurality of frequency zones comprising the specific single SCell, wherein the plurality of frequency zones include at least one available frequency zone and at least zone unavailable frequency zone; and performing the communication from the specific single SCell, wherein a signal for the communication is transmitted and received only within the at least one available frequency from the specific single SCell. | 04-24-2014 |
20140119313 | METHOD FOR TRANSMITTING AND RECEIVING UPLINK SIGNAL, USER EQUIPMENT, AND BASE STATION - The present invention categorizes a plurality of cells that are configured to a user equipment into at least one cell group, and configures an anchor cell for each of the cell groups. The anchor cell for each of the cell groups is used for transmitting a PUCCH, which carries uplink control information on a pertinent cell group, and in a random access process for acquiring a timing advance with respect to the pertinent cell group. When the uplink control information is transmitted from a PUSCH of one cell, the PUSCH carries only the uplink control information on the cell group to which the one cell belongs and does not carry information on another cell group. | 05-01-2014 |
20140119339 | METHOD FOR CONTROLLING ERROR FOR CARRIER AGGREGATION AND APPARATUS FOR SAME - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method for carrying out a hybrid automatic repeat request (HARQ) process when a plurality of cells are configured, comprising the following steps: receiving scheduling information for transmitting data from a first cell; operating a first HARQ process from the first cell based on the scheduling information; and relaying an operation of the first HARQ process to a second HARQ process of a second cell which is different from the first cell, when a predetermined condition is satisfied. | 05-01-2014 |
20140126433 | METHOD FOR TRANSMITTING CONTROL INFORMATION AND APPARATUS FOR SAME - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and an apparatus for transmitting uplink control information in the wireless communication system, which supports carrier aggregation and operates by a TDD, and comprises the steps of: receiving periodic information for reporting CSI; generating A/N information with respect to at least one cell from a plurality of cells to transmit from an uplink subframe n; and performing an action for transmitting the CSI information from the uplink subframe n according to the periodic information, wherein the CSI information and the A/N information are transmitted from the uplink subframe n through the same physical channel when a specific condition is satisfied, and only the A/N information is transmitted from the uplink subframe n when the specific condition is not satisfied, wherein the specific condition is Mp=0, and the A/N information comprising only A/N with respect to a first piece of specific downlink data that is received through a specific SCell, wherein the Mp expresses the number of downlink subframes that corresponds to the uplink subframe n with respect to a PCell. | 05-08-2014 |
20140133430 | METHOD AND APPARATUS FOR TRANSMITTING/RECEIVING UPLINK SIGNAL, AND METHOD AND APPARATUS FOR TRANSMITTING/RECEIVING DOWNLINK SIGNAL - The present invention provides a method for scheduling an uplink and a method for scheduling a downlink for a user equipment group comprising a plurality of user equipments in similar channel situations. In the present invention, which relates to the method for scheduling the uplink, a primary user equipment for a user equipment group is configured, and information according to a random access procedure that is performed by the primary user equipment is shared by means of other user equipments in the user equipment group. In the present invention, which relates to the method for scheduling the downlink, each of the user equipment in the user equipment group attempt to detect downlink data by a random access preamble transmission timing, and transmits a pertinent random access preamble to a base station at the random access preamble transmission timing, thereby notifying the base station of a failure to receive the downlink data, when the detection of the downlink data by the random access preamble transmission timing fails. | 05-15-2014 |
20140161084 | DOWNLINK SIGNAL RECEIVING METHOD AND USER EQUIPMENT, AND DOWNLINK SIGNAL TRANSMITTING METHOD AND BASE STATION - According to the present invention, one or more PDCCH-SFs are set from among subframes in a predetermined duration so as to force user equipment (UE) to perform a PDCCH blind decoding (BD). Information indicating said set PDCCH-SF is provided to the UE from a base station (BS). The UE performs the PDCCH BD only in the PDCCH-SF which is set to the UE itself, and not to all subframes, and performs HARQ process(es) according to the PDCCH BD. The present invention exhibits the advantages of reducing the number of BDs which the UE has to perform and of reducing the implementation complexity of the UE. | 06-12-2014 |
20140169242 | METHOD FOR TRANSMITTING CONTROL INFORMATION AND APPARATUS FOR SAME - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method for transmitting uplink control information in a wireless communication system that supports carrier aggregation and operates in a time division duplex (TDD) scheme, the method comprising a step of transmitting a hybrid automatic repeat request-acknowledgement (HARQ-ACK) for each component carrier (CC) according to a specific parameter; wherein if the specific parameter is smaller than a specific value, the HARQ-ACK for each CC is individually transmitted, and if the specific parameter is equal to or larger than the specific value, the HARQ-ACK for each CC is transmitted using the specific number of bit values corresponding to said HARQ-ACK. The present invention also relates to an apparatus for the method. | 06-19-2014 |
20140169319 | METHOD FOR TRANSMITTING UPLINK SIGNAL, USER EQUIPMENT, METHOD FOR RECEIVING UPLINK SIGNAL, AND BASE STATION - The present invention provides a method for a user equipment, which is included in a user equipment group that comprises a plurality of user equipments, transmitting to a base station an Acknowledgement/Negative ACK (ACK/NACK) signal with respect to downlink data that is received from the base station. The base station, according to the present invention, quasi-statically sets physical uplink control channel (PUCCH) resource identification information, which would be used by each of the plurality of user equipments, and dynamically allocates to the user equipment group a collection of PUCCH resources usable for transmitting ACK/NACK of the user equipment group. The user equipment, according to the present invention, transmits the ACK/NACK signal to the base station by using the PUCCH resource that is allocated to the user equipment from the collection of the PUCCH resources, which are dynamically allocated to the user equipment group, based on the PUCCH resource identification information that is quasi-statically allocated to the user equipment. | 06-19-2014 |
20140177488 | METHOD FOR USER EQUIPMENT TRANSRECEIVING SIGNAL IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method for receiving a signal between a user equipment and a base station in a wireless communication system, and to an apparatus for same. More particularly, a method for the user equipment receiving the signal in the wireless communication system, which is operated by a time division duplex (TDD), comprises the steps of: confirming a subframe which is reconfigured as a downlink, from a plurality of subframes that are configured according to a TDD uplink-downlink configuration; and receiving the signal from the subframe, which is reconfigured, wherein an index of the last orthogonal frequency division multiplexing (OFDM) symbol, from which the signal can be received, is decided in the subframe that is reconfigured. | 06-26-2014 |
20140192688 | METHOD FOR TRANSMITTING CONTROL INFORMATION AND APPARATUS FOR SAME - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and an apparatus for transmitting uplink control information in the wireless communication system, which supports carrier aggregation and operates by a TDD, and comprises the steps of: deciding HARQ-ACK bit numbers for each cell from a plurality of cells; composing a HARQ-ACK payload comprising HARQ-ACK bit(s) for each of the plurality of cells; and transmitting the HARQ-ACK payload from a subframe n through a PUSCH. | 07-10-2014 |
20140198756 | METHOD AND APPARATUS FOR ALLOCATION OF DISCONTINUOUS UPLINK RESOURCE - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and apparatus for transmitting an uplink signal in a wireless communication system, wherein the method for transmitting an uplink signal in a wireless communication system comprises: a step of receiving a control channel signal containing resource allocation information; and a step of transmitting an uplink signal in accordance with the control channel signal, wherein the resource allocation information has a combination index r to be used for indicating two sets of resource blocks, and each set of resource blocks includes one or more continuous resource blocks. | 07-17-2014 |
20140204813 | METHOD AND APPARATUS FOR TRANSCEIVING SIGNALS - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and to an apparatus for the method, wherein the method is configured such that a base station, in which cross-carrier scheduling through a first component carrier (CC) is set, transmits a downlink signal in a TDD wireless communication system in which the first CC and a second CC are aggregated, wherein the method comprises a step of transmitting a control channel signal during a specific subframe timing during which the second CC is set as a downlink. The transmitting step involves transmitting the control channel signal through a control channel region of the first CC when the first CC is set as a downlink in the specific subframe timing, and transmitting the control channel signal through a control channel region of the second CC when the first CC is set as an uplink during the specific subframe timing. | 07-24-2014 |
20140204879 | METHOD AND DEVICE FOR UPLINK RESOURCE ALLOCATION - A method for transmitting an uplink signal by a device in a wireless communication system, the method including receiving a control channel signal including a resource allocation (RA) field; and transmitting an uplink signal according to the control channel signal. A size of the RA field is represented by the following expression MAX (RASizeA, RASizeB). RASizeA is a first number of bits for indicating a resource indication value (RIV) corresponding to a starting resource block (RB) and a length of contiguously allocated RBs. RASizeB is a second number of bits for indicating a combinatorial index r corresponding to 4 indexes, and the 4 indexes are used to indicate a start resource block group (RBG) index and an end RBG index of a first RB set and a start RBG index and an end RBG index of a second RB set. | 07-24-2014 |
20140211730 | METHOD FOR BASE STATION TO MULITIPLEX DOWNLINK CONTROL CHANNEL IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREFOR - Disclosed is a method for a base station to transmit a downlink control channel in a wireless communication system. Specifically, the method comprises the steps of: separating each resource block, of which there are at least one, into a preconfigured number of subsets; structuring basic resource allocation units for an downlink control channel as one of the subsets comprised in one or more resource blocks; configuring the basic resource allocation units, the number of which correspond to the aggregation level of the downlink control channel, as transmission resources; and using the transmission resource to transmit the downlink control channel to a terminal. | 07-31-2014 |
20140213315 | METHOD FOR TRANSMITTING SOUNDING REFERENCE SIGNAL IN BASE STATION COOPERATIVE WIRELESS COMMUNICATION SYSTEM AND APPARATUS FOR SAME - The present invention relates to a method for a terminal transmitting a sounding reference signal in a wireless communication system. More particularly, the method comprises the steps of: receiving from a network at least one first transmission power offset value of the sounding reference signal for a first cell; deciding transmission power of the sounding reference signal for the first cell, based on transmission power for an uplink data channel for a second cell and the at least one transmission power offset value; and transmitting the sounding reference signal for the first cell to the first cell. | 07-31-2014 |
20140241222 | METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method in which a terminal performs communication in a TDD-based wireless communication system having a plurality of CCs aggregated therein, the method comprising: a step of performing an uplink transmission or a downlink reception in each subframe on a first CC according to a first UL-DL configuration; and a step of performing an uplink transmission or a downlink reception in each subframe on a second CC according to a second UL-DL configuration. If the configuration of the subframe of the first CC is [U, D] and the configuration of the subframe of the second CC is [U, U] in subframes #k and #k+1, the subframe #k+1 of the second CC is set to X. The present invention also relates to an apparatus for the method. | 08-28-2014 |
20140307695 | METHOD FOR TRANSMITTING AND RECEIVING CONTROL INFORMATION AND APPARATUS FOR THE SAME - The present invention relates to a wireless communication and, more specifically, to a method for transmitting an HARQ) response by a UE in a wireless communication system, and an apparatus for the same. The method includes receiving an E-PDCCH signal on at least one of a plurality of enhanced physical downlink control channel (E-PDCCH) sets, each E-PDCCH set including a plurality of resources units indexed per E-PDCCH set; and transmitting the HARQ response using a physical uplink control channel (PUCCH) resource determined using the index of the first resource unit among one or more resource units carrying the E-PDCCH signal, wherein the index of the first resource unit is determined on the basis of the E-PDCCH set having the lowest index among the plurality of E-PDCCH sets when specific conditions are satisfied. | 10-16-2014 |
20140313950 | METHOD FOR TRANSMITTING CONTROL INFORMATION AND APPARATUS THEREFOR - A method and device for transmitting uplink control information in a wireless communication system supporting carrier aggregation and operating in TDD are discussed. The method includes transmitting hybrid automatic repeat request acknowledgements (HARQ-ACKs) feedback bits o(0),o(1),o(2),o(3) on a physical uplink shared channel (PUSCH), wherein the HARQ-ACKs feedback bits corresponds to HARQ-ACK(0), HARQ-ACK(1), HARQ-ACK(2), and HARQ-ACK(3) associated with a first component carrier (CC) and HARQ-ACK(0), HARQ-ACK(1), HARQ-ACK(2), and HARQ-ACK(3) associated with a second CC. | 10-23-2014 |
20140328292 | METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, particularly, a method in which a terminal transmits control information in a CA-based wireless communication system and an apparatus for the method, the method comprising: configuring a first cell and a second cell having different subframe configurations, wherein the second cell has any one of UL-DL configuration #0 to #6; receiving a DC) format including a DAI field, for the second cell; and transmitting HARQ-ACK information relating to the downlink DCI format. For HARQ-ACK timing, in cases where a reference UL-DL configuration applied to the second cell is any one of UL-DL configurations #1 to #6, the DAI field is used in a process of transmitting the HARQ-ACK information. For HARQ-ACK timing, in cases where a reference UL-DL configuration applied to the second cell is #0, the DAI field is not used in a process of transmitting the HARQ-ACK information. | 11-06-2014 |
20140328332 | METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system. In particular, the present invention relates to a method and apparatus for transmitting control information by means of a terminal in a CA-based wireless communication system, including the steps of: forming first and second cells that include different subframe configurations, wherein the second cell includes TDD UL-DL configuration #0; receiving a UL grant by means of the first cell; and transmitting data corresponding to the UL grant by means of the second cell. | 11-06-2014 |
20140334357 | METHOD FOR TRANSMITTING/RECEIVING SIGNAL AND DEVICE THEREFOR - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and a device therefor, the method comprising: setting a first cell having a first TDD UL-DL configuration and a second cell having a second TDD UL-DL configuration; receiving data through a DL subframe of the first cell; and transmitting reception response information on the data through a UL subframe of the second cell, wherein the relationship between the DL subframe and the UL subframe is determined by a parameter value set in a specific TDD UL-DL configuration, which is the TDD UL-DL configuration having the least number of DL subframes from TDD UL-DL configuration(s), in which subframes set as a DL in the first or second cell are all set as DLs. | 11-13-2014 |
20140334358 | METHOD FOR TRANSMITTING/RECEIVING SIGNAL AND DEVICE THEREFOR - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and a device therefor, the method comprising: setting a first cell having a first TDD UL-DL configuration and a second cell having a second TDD UL-DL configuration; receiving data through a DL subframe of the first cell; and transmitting reception response information on the data through a UL subframe of the second cell, wherein the relationship between the DL subframe and the UL subframe is determined by a parameter value set in a specific TDD UL-DL configuration, which is the TDD UL-DL configuration having the least number of DL subframes from TDD UL-DL configuration(s), in which subframes set as a DL in the first or second cell are all set as DLs. | 11-13-2014 |
20140334419 | METHOD FOR TRANSCEIVING CONTROL INFORMATION AND APPARATUS FOR SAME - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and an apparatus for transmitting uplink control information in a terminal for which a coordinated multi-point (CoMP) set including a plurality of cells is constructed in a carrier aggregation-based wireless communication system. The method comprises: a step of receiving a physical downlink control channel signal (PDCCH) for uplink scheduling; step of receiving a physical downlink shared channel (PDSCH) signal corresponding to the PDCCH signal on a secondary cell (SCell); and a step of transmitting PDSCH signal acknowledgement information via a physical uplink control channel (PUCCH). In cases where the SCell belongs to the CoMP set having a primary cell (PCell), a resource for the PUCCH is provided using an index for a specific resource unit from among one or more resource units used in transmitting the PDCCH signal. In cases where the SCell does not belong to the CoMP set having a PCell, a resource for the PUCCH is provided using a value of a specific field within the PDCCH signal. | 11-13-2014 |
20140341094 | METHOD FOR TRANSMITTING/RECEIVING SIGNAL AND DEVICE THEREFOR - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method for transmitting uplink control information and a device therefor, the method comprising the steps of: forming a plurality of serving cells each having different UL-DL configurations; receiving one or more signals requiring a HARQ-ACK response from M(M≧1) number of subframes; and executing the process for transmitting the HARQ-ACK response to the one or more signals in a specific subframe corresponding to the M number of subframes, wherein, only when the specific subframe is set as an uplink in all of the plurality of serving cells, the HARQ-ACK response to the one or more signals are transmitted through the specific subframe. | 11-20-2014 |
20140341095 | METHOD FOR TRANSMITTING/RECEIVING SIGNAL AND DEVICE THEREFOR - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method for transmitting uplink control information and a device therefor, the method comprising the steps of: forming a plurality of serving cells each having different UL-DL configurations; receiving one or more signals requiring a HARQ-ACK response from M(M≧1) number of subframes; and executing the process for transmitting the HARQ-ACK response to the one or more signals in a specific subframe corresponding to the M number of subframes, wherein, only when the specific subframe is set as an uplink in all of the plurality of serving cells, the HARQ-ACK response to the one or more signals are transmitted through the specific subframe. | 11-20-2014 |
20140355539 | METHOD AND APPARATUS FOR PERFORMING RANDOM ACCESS PROCESS IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system. In detail, the present invention is a method in which user equipment for which a plurality of cells is constituted receives control information in a carrier aggregation-based wireless communication system, and an apparatus for the method. The method comprises: a step of receiving, through a first cell, uplink resource allocation information for a second cell; a step of transmitting an uplink signal on the second cell using the uplink resource allocation information; and a step of receiving response information to the uplink signal. The response information is received via a specific cell rather than the first cell when the uplink signal is transmitted by a random access process, and the response information is received via the first cell when the uplink signal is transmitted by a non-random access process. | 12-04-2014 |
20140362747 | METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system. In particular, the present invention relates to a method and apparatus for transmitting control information by means of a terminal in a CA-based wireless communication system, including the steps of: forming first and second cells that include different subframe configurations, wherein the second cell includes TDD UL-DL configuration #0; receiving a UL grant by means of the first cell; and transmitting data corresponding to the UL grant by means of the second cell. | 12-11-2014 |
20140362796 | METHOD AND APPARATUS FOR ALLOCATING CHANNELS RELATED TO UPLINK BUNDLING - A new PHICH channel and a new PDCCH channel are allocated when the location of a subframe to be used in transmission changes by the change in the configuration of the subframe caused by a dynamic uplink/downlink configuration in a subframe bundling transmission mode. In the event that a subframe is successfully transmitted in a subframe bundling mode, the location of the subframe that has been successfully transmitted is determined as a reference in determining the point of time of the response to the bundling transmission. In addition, the bundling transmission following the subframe that has been successfully transmitted can be omitted. | 12-11-2014 |
20140376421 | METHOD FOR TRANSMITTING CONTROL INFORMATION AND APPARATUS FOR SAME - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and an apparatus for transmitting uplink control information in the wireless communication system, which supports carrier aggregation and operates by a TDD, and comprises the steps of: generating a first HARQ-ACK set with respect to a first cell by using an L1 value; generating a second HARQ-ACK set with respect to a second cell by using an L2 value; and transmitting bit values, which correspond to the first and second HARQ-ACK sets are transmitted through a PUSCH from a subframe n, wherein L1=min (M1, W) and L2=min (M2, W) when the value (W) of a UL DAI corresponding to the PUSCH is 1 or 2, and L1=L2=W when the value (W) of the UL DAI corresponding to the PUSCH is 3 or 4, wherein min (A, B) represents a smaller number from A and B, M1 corresponds to the number of downlink subframes that correspond to an uplink subframe n with respect to the first cell, M2 corresponds to a the number of downlink subframes that correspond to the uplink subframe n with respect to the second cell, wherein the first cell and the second cell have different UL-DL configurations. | 12-25-2014 |
20150016239 | METHOD AND APPARATUS FOR SETTING REFERENCE SIGNAL - Disclosed are a method and an apparatus for setting a reference signal. A wireless apparatus receives a primary synchronization signal (PSS) transmitted by a first orthogonal frequency division multiplexing (OFDM) symbol and a secondary synchronization signal (SSS) from a second OFDM symbol, and can search information for setting a reference signal on the basis of symbol numbers of the first OFDM symbol and the second OFDM symbol. Inter-cell interference can be reduced by means of a variety of methods for setting a reference signal. | 01-15-2015 |
20150016310 | METHOD AND DEVICE FOR TRANSMITTING DATA FOR HALF-DUPLEX DEVICE - A method for transmitting data for a half-duplex device in a wireless communication system is provided. The half-duplex device receives first downlink control information from a base station in a first subframe. The half-duplex device transmits uplink data to the base station in a second subframe. The first downlink control information includes a resource through which the uplink data is transmitted and information on the second subframe. | 01-15-2015 |
20150016315 | METHOD FOR TRANSRECEIVING SIGNALS AND APPARATUS FOR SAME - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method for transmitting an uplink signal in a wireless communication system supporting carrier aggregation (CA), and to an apparatus for same, comprising the steps of: establishing a first cell having a first time division duplex (TDD) uplink-downlink (UL-DL) configuration and a second cell having a second TDD UL-DL configuration; receiving data through a DL subframe of the first cell; and transmitting reception reply information with respect to the data through a UL subframe of the second cell. | 01-15-2015 |
20150016317 | METHOD FOR CONTROLLING TRANSMISSION POWER OF SOUNDING REFERENCE SIGNAL IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS FOR SAME - In the present invention, disclosed is a method for a terminal, which receives a downlink signal from a first base station and transmits an uplink signal to a second base station, transmitting a sounding reference signal (SRS) in a wireless communication system. More specifically, the method comprises the steps of: receiving from the first base station downlink control information including a triggering message of a first SRS; determining transmission power of the first SRS on the basis of the downlink control information; and transmitting the first SRS to the first base station with the transmission power that is determined, wherein a transmission power control command field, which is included in the downlink control information, is applied to a closed loop parameter for determining the transmission power of the first SRS. | 01-15-2015 |
20150016339 | USER EQUIPMENT AND METHOD FOR RECEIVING SYNCHRONIZATION SIGNALS, AND BASE STATION AND METHOD FOR TRANSMITTING SYNCHRONIZATION SIGNALS - The present invention relates to a new type of carrier wave having a different configuration from existing carrier waves. The new type of carrier wave is detected by using at least one of a primary synchronization signal (PSS) and a secondary synchronization signal (SSS). When the new type of carrier wave is formed for detection by using only one of the PSS or the SSS, or by using both of the PSS and SSS, the new type of carrier wave includes PSS and SSS transmissions which are different from existing PSS and SSS transmissions. | 01-15-2015 |
20150016377 | METHOD AND APPARATUS FOR UPLINK TRANSMISSION - Disclosed are a method and an apparatus for uplink transmission. A method for uplink transmission for a machine-type communication (MTC) terminal comprises: a step of transmitting first uplink (UL) information via a first UL channel in a first terminal-specific frequency band of a first subframe; and a step of transmitting second UL information via a second UL channel in a second terminal-specific frequency band of a second subframe subsequent to the first subframe. The first subframe and the second subframe each include a plurality of orthogonal frequency division multiplexing (OFDM) symbols. If the first terminal-specific frequency band and the second terminal-specific frequency band do not overlap one another, the second UL information may not be transmitted in a first OFDM symbol of the second subframe. Thus, a wireless resource can be efficiently utilized. | 01-15-2015 |
20150016408 | METHOD FOR TRANSRECEIVING SIGNALS AND APPARATUS FOR SAME - The present invention relates to a wireless communication system. More specifically, the present invention relates to a method for receiving data on user equipment supporting a plurality of types of carriers in the wireless communication system, and to the apparatus for same, the method comprising the steps of: receiving a transmission mode-common (TM-common) downlink control information (DCI) format including downlink scheduling information; and receiving the data through a resource indicated by the downlink scheduling information, wherein the data is modulated by using a user equipment-specific (UE-specific) reference signal when the data is received through a first type of carrier, and the data is modulated through a first cell-common reference signal when the data is received through second type of carrier. | 01-15-2015 |
20150023331 | METHOD AND USER EQUIPMENT FOR RECEIVING REFERENCE SIGNALS, AND METHOD AND BASE STATION FOR TRANSMITTING REFERENCE SIGNALS - According to the present invention, a common reference signal is transmitted in a subframe configured to receive the common reference signal and/or a fixed subframe predefined to receive the common reference signal, from among a plurality of subframes within a frame. In the present invention, the common reference signal is transmitted in every subframe within a legacy frame duration. However, the common reference signal is transmitted in said configured subframe and/or said fixed subframe within a frame duration which is not a legacy frame duration. | 01-22-2015 |
20150029886 | COMMUNICATION METHOD IN CONSIDERATION OF CARRIER TYPES AND APPARATUS FOR SAME - The present invention relates to a wireless communication system. In particular, the present invention relates to a method for a terminal to receive a downlink signal in a wireless communication system and to an apparatus for same, the method comprising the steps of: receiving, from a base station, a first piece of information indicating the start point of a multicast broadcast single frequency network (MBSFN) signal, receiving an MBSFN subframe having a plurality of orthogonal frequency division multiplexing (OFDM) symbols, and receiving the MBSFN signal from an OFDM symbol indicated by the first piece of information in the MBSFN subframe. | 01-29-2015 |
20150030037 | METHOD OF CARRYING OUT SYNCHRONIZATION TRACKING AND A WIRELESS DEVICE USING THE SAME - There are provided a method of carrying out synchronization tracking and a wireless device using the same. The wireless device receives CSI-RS (Channel Status Information-Reference Signal) setting for prescribing the CSI-RS from a base station, and TRS (Tracking Reference Signal) setting for prescribing the TRS from the base station. The wireless device tracks the synchronization based on the TRS. | 01-29-2015 |
20150030090 | COMMUNICATION METHOD FOR USER EQUIPMENT AND USER EQUIPMENT, AND COMMUNICATION METHOD FOR BASE STATION AND BASE STATION - The present invention relates to subframe configuration information for half duplex frequency duplex (HD-FDD) or time division duplex (TDD). The subframe configuration indicates which of a predefined plurality of continuous subframes is a subframe for downlink reception, which of the plurality of contiguous subframes is a subframe for uplink transmission, or which of the plurality of contiguous subframes is a special subframe that includes at least one OFDM symbol for the downlink reception and at least one OFDM symbol for the uplink transmission. | 01-29-2015 |
20150036653 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING DATA - A method and apparatus of transmitting and receiving data is provided. A user equipment receives physical downlink shared channel data on a PDSCH in a second subframe from a second serving cell to the user equipment. The second serving cell is activated by the first serving cell, and the second serving cell does not map the PDSCH data to a second RE corresponding to a first resource element of the first subframe mapped with the CRS. The CRS is generated from a pseudo random sequence that is initiated by a cell identifier of the first serving cell and the PDSCH is indicated by an enhanced physical downlink shared channel of the second subframe, and the second RE of the second subframe and the first RE of the first subframe overlap in a time domain and in a frequency domain. | 02-05-2015 |
20150043458 | METHOD AND APPARATUS FOR TRANSMITTING PERIODIC CHANNEL STATE INFORMATION IN WIRELESS COMMUNICATION SYSTEM - Provided are a method for transmitting uplink control information by a user equipment in a wireless communication system, and a user equipment using the method. In the method, a setting of subframes for transmitting each of multiple types of periodic channel state information (CSI) is received, and the multiple types of the periodic CSI from the subframes are transmitted, wherein when the multiple types of the CSI are set to include a rank indicator (RI) for indicating the number of layers recommended by the user equipment, and the RI and a different periodic CSI excluding the RI are set to be transmitted from the same subframe, the RI and the different periodic CSI are multiplexed to the same subframe and then transmitted. | 02-12-2015 |
20150049687 | METHOD AND APPARATUS FOR COMMUNICATING BY USING DIFFERENT TYPES OF CARRIERS IN RADIO COMMUNICATION SYSTEM SUPPORTING CARRIER AGGREGATION - Provided through the present application are a method and an apparatus for use in a radio communication system, which supports carrier aggregation and carries out communication in subframe units. More specifically, user equipment operating in a first type carrier for receiving from a base station, a first piece of control information, which is related to the first type carrier and a second type carrier that support the carrier aggregation, can measure a radio signal to carry out radio resource management with respect to the first type carrier by using a first reference signal, which is included in the first type carrier, and/or a second reference signal, which is included in the second type carrier. | 02-19-2015 |
20150049704 | METHOD AND APPARATUS FOR TRANSMITTING OR RECEIVING DOWNLINK SIGNAL - The method for receiving a downlink signal by user equipment in a wireless communication system that supports coordinated multiple-point transmission and reception (CoMP) according to one embodiment of the present invention comprises a step of receiving information regarding two candidate seed groups for generating a sequence of downlink demodulation reference signals; and a step of generating a sequence of downlink demodulation reference signals using one of at least two candidate DMRS set parameter groups. Each of at least two candidate DMRS set parameter groups includes a cell identifier and a scrambling identifier. The scrambling identifier included in one of at least two candidate DMRS set parameter groups may be determined whether the two cell identifiers included respectively in at least two candidate DMRS set parameter groups are the same or not. | 02-19-2015 |
20150055518 | METHOD FOR TRANSMITTING OR RECEIVING UPLINK SIGNAL - The present invention relates to a method for user equipment transmitting an uplink signal in a time division duplex (TDD) wireless communication system, according to one embodiment. The method comprises: detecting a downlink control signal; and transmitting the uplink signal on the basis of uplink-related control information which is included in the downlink control signal that is detected, wherein a transmission power value is reported on the basis of an indicator, which indicates reporting of the transmission power value of the uplink signal at a specific time. | 02-26-2015 |
20150055521 | METHOD AND DEVICE FOR AGGREGATING CARRIERS IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method and a device for aggregating carriers in a wireless communication system. In the method, a first carrier is configured, and a second carrier is configured in addition to the first carrier. The first carrier is a time division duplex (TDD) carrier for which an uplink subframe and a downlink subframe are positioned at different times in a frame, and the second carrier is a carrier only for an uplink, which consists of uplink subframes. | 02-26-2015 |
20150055606 | METHOD FOR TRANSMITTING CONTROL INFORMATION AND APPARATUS THEREFOR - A method for transmitting uplink control information. The method according to an embodiment includes identifying a Hybrid Automatic Repeat reQuest—Acknowledgement (HARQ-ACK)(0) and a HARQ-ACK(1), and transmitting b(0)b(1) using a PUCCH resource among a plurality of PUCCH resources based on the HARQ-ACK(0) and the HARQ-ACK(1). a Physical Downlink Control Channel (PDCCH) on the primary cell. | 02-26-2015 |
20150063140 | METHOD FOR MEASURING CHANNEL USING TRACKING REFERENCE SIGNAL IN WIRELESS COMMUNICATION SYSTEM AND DEVICE USING SAME - A method for measuring a channel in a wireless communication system is provided. A terminal receives a first reference signal from a primary cell. The terminal receives a second reference signal from a secondary cell corresponding to the primary cell. The terminal measures a channel for the secondary cell on the basis of the second reference signal. A subframe in which the second reference signal is received is signaled from the primary cell. | 03-05-2015 |
20150063179 | METHOD FOR TRANSMITTING CONTROL INFORMATION AND APPARATUS THEREFOR - A method and a communication device are described for transmitting uplink control information in a wireless communication system supporting carrier aggregation. At least one of a plurality of physical downlink control channels (PDCCHs) indicating downlink semi-persistent scheduling (SPS) release or physical downlink shared channels (PDSCHs) is received in a plurality of downlink subframes according to an uplink (UL) downlink (DL) configuration for time division duplex (TDD). A PDCCH with a downlink control information (DCI) format for UL scheduling including a 2-bit field is received. Acknowledgement (ACK)/negative acknowledgement (NACK) information corresponding to the at least one PDCCH indicating downlink SPS release or the PDSCHs is transmitted through a physical uplink shared channel (PUSCH) based on the received PDCCH with the DCI format for UL scheduling. | 03-05-2015 |
20150063234 | METHOD AND APPARATUS FOR TRANSMITTING OR RECEIVING DOWNLINK SIGNAL - Provided is a method for receiving a downlink signal by a user equipment (UE) in a wireless communication system supporting Coordinated Multi-point transmission and reception includes: receiving a list of candidate seeds for generating a sequence of a downlink demodulation reference signal (DM-RS) and downlink control information, and detecting the DCI; if a format of the detected DCI corresponds to a unique operation of a transmission mode configured to the UE, generating a sequence of the downlink DM-RS using one seed value selected from among the list of the candidate seeds on the basis of specific information included in the DCI; and if a format of the detected DCI corresponds to a fall-back operation of the transmission mode, generating a sequence of the downlink DM-RS using a specific seed value selected from among the list of the candidate seeds or an identifier (ID) of a serving cell. | 03-05-2015 |
20150071099 | Method and Apparatus for Receiving Downlink Data in Wireless Communication System - Provided is a method for receiving downlink data in a wireless communication system. User equipment (UE) receives downlink control information in a first subframe from a primary cell. The user equipment receives downlink data from a secondary cell in a second subframe over a physical downlink shared channel (PDSCH). The user equipment determines a transmission block size in accordance with the type of the carrier of the second subframe. The user equipment decodes the PDSCH on the basis of the downlink control information and the transmission block size. | 03-12-2015 |
20150071206 | METHOD AND APPARATUS FOR TRANSMITTING SOUNDING REFERENCE SIGNALS IN WIRELESS COMMUNICATION SYSTEMS - The present invention relates to a method and apparatus for transmitting sounding reference signals in wireless communication systems. The method includes the steps of: receiving sounding reference signal (SRS) setting information indicating an SRS transmitting scheme for an uplink carrier; and transmitting the SRS in the SRS transmitting scheme determined on the basis of the SRS setting information, wherein the SRS transmitting scheme is intended for transmitting the SRS in all of the bands of the uplink carrier, or in some of the bands of the uplink carrier. | 03-12-2015 |
20150078222 | SIGNAL-TRANSCEIVING METHOD, AND APPARATUS THEREFOR - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and apparatus for transmitting an uplink signal in a time division duplex (TDD)-based wireless communication system. The method comprises the steps of receiving scheduling information for data transmission in a first uplink subframe, and transmitting uplink data based on the scheduling information. The uplink data transmission period includes the first uplink subframe, and further includes, if the second subframe immediately before the first uplink subframe is a subframe including a downlink period, a guard period and an uplink period, and if a predetermined condition is satisfied, an uplink period of a second subframe. | 03-19-2015 |
20150078223 | METHOD FOR TRANSCEIVING SIGNALS, AND APPARATUS THEREFOR - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method for a terminal to perform a HARQ process in which a scheduling cell of a first UL-DL configuration and a P-scheduling cell of a second TDD UL-DL configuration are set in a wireless communication system that supports carrier aggregation (CA), as well as to an apparatus for the method. The method comprises the steps of: receiving a UL grant through the scheduling cell; transmitting data corresponding to the UL grant through the P-scheduling cell according to the HARQ timing of a specific UL-DL configuration; and receiving data acknowledgement information through the scheduling cell according to the HARQ timing of the specific UL-DL configuration. | 03-19-2015 |
20150078225 | METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION - A method is described for transmitting uplink control information at a communication apparatus configured with a plurality of cells including a Primary Cell (PCell) and a Secondary Cell (SCell) in a wireless communication system operating in a Time Division Duplex (TDD) mode. One or more downlink signals requiring Hybrid Automatic Repeat reQuest Acknowledgement (HARQ-ACK) feedback are received in a set of subframes. Reception response information about the one or more downlink signals is transmitted through a Physical Uplink Control CHannel (PUCCH) on a subframe configured for Scheduling Request (SR) transmission. When a predetermined condition is not satisfied, the reception response information and SR information are multiplexed and transmitted using a first HARQ-ACK PUCCH resource. When the predetermined condition is satisfied, for a positive SR, the reception response information includes information about an ACK count for the one or more downlink signals and is transmitted using a SR PUCCH resource. | 03-19-2015 |
20150078277 | METHOD FOR TRANSCEIVING DOWNLINK CONTROL CHANNEL IN WIRELESS COMMUNICATION SYSTEM, AND APPARATUS THEREFOR - The present invention relates to a method to receive an enhanced physical downlink control channel (EPDCCH) in a wireless communication system. More particularly, the method includes monitoring at least one EPDCCH candidate consisting of one or more enhanced control channel elements (ECCEs) in resource blocks and receiving the EPDCCH, wherein the number of ECCEs forming each of the one or more EPDCCH candidates corresponds to an aggregation level, the number of the EPDCCH candidates is set based on the number of ECCEs for each resource block and the number of resource blocks, and, when the number of resource blocks is a first value and the number of ECCEs for each resource block is a second value, the number of EPDCCH candidates in a specific aggregation level is set as a value obtained by dividing the total number of ECCEs by the specific aggregation level. | 03-19-2015 |
20150078285 | METHOD AND APPARATUS FOR RECEIVING DOWNLINK DATA IN A WIRELESS COMMUNICATION SYSTEM - A method for receiving downlink data in a wireless communication system is provided. A user equipment receives downlink control information via a downlink control channel in a subframe. The downlink control information includes reference signal (RS) information and physical downlink shared channel (PDSCH) information. The RS information indicates transmission antenna ports, a scrambling identity and a number of transmission layers. The user equipment receives a RS for demodulating a PDSCH based on the RS information in the subframe. The RS is generated based on the scrambling identity. The user equipment receives downlink data via the PDSCH in the subframe. Resource element (RE) mapping information on REs assigned for the PDSCH is determined based on the PDSCH information. | 03-19-2015 |
20150078465 | METHOD AND APPARATUS FOR TRANSMITTING REFERENCE SIGNALS - Provided is a method for transmitting a reference signal in a time division duplex (TDD)-based wireless communication system. A base station transmits a synchronization signal in a subframe including N resource blocks in a frequency domain, and K (K>1) orthogonal frequency division multiplexing (OFDM) symbols in a time domain. The base station transmits a reference signal generated on the basis of a terminal identifier in the subframe. The subframe includes a downlink pilot time slot (DwPTS), a guard period (GP), and an uplink pilot time slot (UpPTS). The DwPTS includes six OFDM symbols. The UpPTS includes two OFDM symbols. The reference signal is transmitted in the first OFDM symbol or the sixth OFDM symbol in the subframe | 03-19-2015 |
20150085782 | METHOD AND APPARATUS FOR MAKING HARQS IN CARRIER AGGREGATION SYSTEMS - The present invention relates to a method and system for making a hybrid automatic repeat requests (HARQ) in a carrier aggregation system. The method receives downlink data through a first subframe of a first carrier, transmits acknowledgement/negative-acknowledgement (ACK/NACK) for the downlink data through a second subframe of a second carrier, and re-receives the downlink data through a third subframe of the first carrier, wherein the first carrier only includes the downlink subframes, and the second carrier includes the uplink subframes and the downlink subframes. | 03-26-2015 |
20150085785 | DATA TRANSMISSION METHOD AND DATA TRANSMISSION DEVICE - A data transmission method and a data transmission device are disclosed. A method for receiving control data by a terminal can comprise the steps of demodulating downlink control information (DCI) including an assignment flag and downlink (DL) resource allocation; and demodulating physical downlink shared channel (PDSCH) data by using the DL resource allocation, wherein when the PDSCH data is demodulated on the basis of a demodulation reference signal (DM-RS), the assignment flag indicates information on a reference signal (RS) used for the demodulation of the PDSCH data or information on a PDSCH transmission antenna port. | 03-26-2015 |
20150092629 | METHOD AND APPARATUS FOR PERFORMING HARQ BASED ON DYNAMIC CHANGE OF WIRELESS RESOURCES IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method for a terminal to transceive a signal through a base station and a predetermined carrier in a time division duplex (TDD) communication system. In detail, the method includes the steps of: receiving, from the base station, information on dynamically changeable uplink/downlink subframe settings; selecting a representative uplink/downlink subframe setting from among the uplink/downlink subframe settings; and performing a hybrid automatic repeat request (HARQ) operation according to the representative uplink/downlink subframe setting. | 04-02-2015 |
20150092637 | SIGNAL TRANSCEIVING METHOD AND APPARATUS FOR SAME - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and apparatus for transceiving a signal in a half-duplex manner in a wireless communication system in which a first carrier and a second carrier are aggregated. The method comprises: a step of receiving a downlink signal on a first carrier during a first symbol period of a specific subframe; and a step of transmitting an uplink signal on a second carrier during a second symbol period of the specific subframe. The specific subframe is set as a downlink subframe in the first carrier and as an uplink subframe in the second carrier. The specific subframe is set to transmit an uplink reference signal. | 04-02-2015 |
20150092690 | METHOD FOR SETTING SEARCH REGION FOR DOWNLINK CONTROL CHANNEL IN WIRELESS COMMUNICATION SYSTEM, AND APPARATUS THEREFOR - The present invention relates to a method for a terminal to receive an enhanced physical downlink control channel (EPDCCH) from a based station in a wireless communication system. In detail, the method includes the step of: receiving the EPDCCH by monitoring EPDCCH candidates consisting of one or more enhanced control channel elements (ECCEs) in at least one resource block set for EPDCCH, wherein the number of ECCEs forming each of the EPDCCH candidates corresponds to an aggregation level, and the period between the EPDCCH candidates for one carrier, which is a specific aggregation level, is determined by dividing the total number of ECCEs included in each of the one or more resource blocks by a corresponding aggregation level and the number of the EPDCCH candidates which are the specific aggregation level. | 04-02-2015 |
20150092694 | METHOD FOR TRANSMITTING CONTROL INFORMATION ON LOW-COST MACHINE-TYPE COMMUNICATION, AND APPARATUS FOR SUPPORTING SAME - The present invention relates to a method for transmitting and receiving an uplink signal for low-cost machine-type communication (MTC) used in a wireless communication system, and the apparatuses for supporting same. The base station of the present invention sets a maximum number of RBs capable of being allocated to the MTC device to be smaller than the total number of RBs in a system band supported by the base station. The MTC device of the present invention transmits an uplink signal through a physical uplink shared channel (PUSCH) on the basis of the maximum number of RBs capable of being allocated to the MTC device. | 04-02-2015 |
20150103705 | METHOD FOR TRANSMITTING CONTROL INFORMATION AND APPARATUS FOR SAME - A method for transmitting uplink control information by a user equipment in a wireless communication system supporting carrier aggregation of a plurality of cells and operating in a time division duplex (TDD). The method according to one embodiment includes receiving, by the user equipment, downlink signals on the plurality of cells, each of the downlink signals requiring a hybrid automatic repeat request acknowledgement (HARQ-ACK) response; and transmitting, by the user equipment, the uplink control information including at least one per-cell HARQ-ACK bit for each cell in an uplink subframe via a physical uplink shared channel (PUSCH). When a reference uplink-downlink (UL-DL) configuration for performing the receiving and the transmitting belongs to a first UL-DL configuration set on each of the plurality of cells, a number of the at least one per-cell HARQ-ACK bit for each cell is determined using a value of min (W, Mc). Min (W, Mc) denotes a smallest value of W and Mc, W denotes a value indicated by 2-bit downlink assignment index (DAI) information included in downlink control information corresponding to the PUSCH, and Mc denotes a number of downlink subframes corresponding to the uplink subframe for each cell. | 04-16-2015 |
20150110017 | METHOD FOR TRANSMITTING OR RECEIVING ACK/NACK SIGNAL - Provided is a method for transmitting an ACK/NACK signal by a user equipment (UE) in a wireless communication system, comprising: detecting control channels in a downlink subframe of a radio frame, wherein ACK/NACK signal for the detected control channels is transmitted in an uplink resource region; determining whether uplink (UL) transmission (Tx) power control values received at respective one of the detected control channels are used as values indicating a resource region for transmission of the ACK/NACK signal, and transmitting the ACK/NACK signal in an uplink resource region decided according to the result of the determining; and if all UL Tx power control values received at the respective one of the detected control channels are not used to indicate the resource region for transmission of the ACK/NACK signal, transmitting the ACK/NACK signal in an uplink resource region linked to the respective one of the detected control channels. | 04-23-2015 |
20150110029 | METHOD AND DEVICE FOR TRANSMITTING UPLINK CONTROL INFORMATION - A method of transmitting uplink control information in a wireless communication system is provided. The method may include: determining whether to simultaneously transmit a hybrid automatic repeat request (HARQ) ACK/NACK and channel state information (CSI) from a sub frame; generating an added HARQ ACK/NACK by adding additional bits having a number of bits corresponding to the number of bits of the CSI to the bits of the HARQ ACK/NACK if it is determined that simultaneous transmission is performed; generating an encoded HARQ ACK/NACK by encoding the added HARQ ACK/NACK; generating a plurality of modulation symbols by modulating the encoded HARQ ACK/NACK; and transmitting the plurality of modulation symbols from the sub frame to an uplink control channel. | 04-23-2015 |
20150110034 | METHOD FOR TRANSCEIVING CONTROL SIGNALS AND APPARATUS THEREFOR - The present invention relates to a method and apparatus for transmitting an acknowledgement (ACK)/negative acknowledgement (NACK) signal in a wireless communication system. The method comprises the steps of: receiving downlink grant information through a physical downlink control channel; receiving downlink data through a physical downlink shared channel scheduled by the downlink grant information; and transmitting a downlink data ACK/NACK signal using a plurality of ACK/NACK resources including a first ACK/NACK resource and a second ACK/NACK resource. The physical downlink control channel is allocated to a data region of a subframe. The first ACK/NACK resource and the second ACK/NACK resource are determined to be the uplink resource linked to a first resource index and the uplink resource linked to a second resource index, respectively, from between the resource index constituting the physical downlink control channel and the resource index contained in the physical downlink shared channel. | 04-23-2015 |
20150110038 | SCHEDULING METHOD FOR DEVICE-TO-DEVICE COMMUNICATION AND APPARATUS FOR SAME - The present invention relates to a wireless communication system. More specifically, the present invention relates to a method for performing a HARQ action and an apparatus for same, comprising the steps of: receiving from a base station resource allocation information which indicates a subframe set for D2D communication; receiving D2D data from a subframe #n from different user equipment; and receiving HARQ-ACK information with respect to the D2D data, wherein the HARQ-ACK information is transmitted from subframe #(n±k) when the subframe #(n+k) belongs to the subframe set for the D2D communication, and the HARQ-ACK is transmitted from a subframe that is closest to the subframe #(n+k) from among subframes belonging to the subframe set for the D2D communication after the subframe #(n+k), when the subframe #(n+k) does not belong to the subframe set for the D2D communication. | 04-23-2015 |
20150124667 | METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION - A method for transmitting uplink control information at a communication apparatus in a time division duplex (TDD) wireless communication system. The method according to one embodiment includes receiving at least one physical downlink control channel (PDCCH) or at least one physical downlink shared channel (PDSCH); and generating reception response information for the at least one PDCCH or the at least one PDSCH. When the reception response information and channel status information are configured to be transmitted in a same subframe, if a certain condition is satisfied, the reception response information and the channel status information are transmitted together using a first physical uplink control channel (PUCCH) format. The certain condition includes a first condition of a single PDCCH transmission only on a primary cell (PCell) that has a downlink assignment index (DAI) initial value and indicates a semi-persistent scheduling (SPS) release being present. | 05-07-2015 |
20150124724 | CONTROL SIGNAL TRANSCEIVING METHOD AND APPARATUS FOR SAME - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and an apparatus for receiving control information in a wireless communication system in which a first carrier type and a second carrier type are aggregated. The method comprises a step of receiving grant information for signal transmission on the second carrier type, wherein the grant information is received through the second carrier type if the grant information includes a first downlink control information (DCI) format, wherein the grant information is received through the first carrier type if the grant information includes a second DCI format. | 05-07-2015 |
20150124737 | METHOD FOR CONTROLLING POWER FOR DEVICE-TO-DEVICE (D2D) COMMUNICATION IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS FOR SAME - A method for a terminal controlling power in a wireless communication system, according to the present invention, comprises the steps of: receiving from a base station power setting information on the difference in power setting values between a first channel for eNodeB-to-device (eNB2D) communication, and a second channel for device-to-device (D2D) communication; and controlling the power of the first channel and/or the second channel in accordance with the power setting information, wherein the power is controlled in accordance with a predetermined priority, which is based on a plurality of channels and a plurality of transmitted data items, which are different from each other are simultaneously transmitted by the terminal at a specific time. | 05-07-2015 |
20150131568 | METHOD AND USER EQUIPMENT FOR TRANSMITTING CHANNEL STATE INFORMATION AND METHOD AND BASE STATION FOR RECEIVING CHANNEL STATE INFORMATION - The present invention provides a method and a device for transmitting or receiving channel state information (CSI). According to the present invention, when a user equipment can be set with one or more CSI processes per serving cell, a CSI request field included in downlink control information for a specific serving cell indicates at least whether a non-periodic CSI report triggered by the CSI request field is triggered for a set of CSI process(es) set by a higher layer from among the CSI process(es) for the one serving cell. | 05-14-2015 |
20150139103 | METHOD FOR TRANSCEIVING CONTROL SIGNALS, AND APPARATUS THEREFOR - The present invention relates to a method and apparatus for transmitting an ACK/NACK signal in a wireless communication system. The method comprises receiving downlink control information including a first field for power control information and a second field for resource allocation information through a physical downlink control channel; receiving downlink data using the resource allocation information; and transmitting an ACK/NACK signal through an ACK/NACK resource over a first carrier. If the downlink data is received on the first carrier, the downlink control information further includes a third field for ACK/NACK resource information, and ACK/NACK resource offset information is received in the third field. If the downlink data is received over a second carrier, ACK/NACK resource offset information is received in the first field. The ACK/NACK resource is determined using the lowest resource index constituting the physical downlink control channel and the ACK/NACK resource offset information. | 05-21-2015 |
20150139113 | METHOD AND USER EQUIPMENT FOR PERFORMING RADIO RESOURCE MANAGEMENT, AND METHOD AND BASE STATION FOR REQUESTING RADIO RESOURCE MANAGEMENT - The present invention provides a method and user equipment for performing radio resource management. The user equipment receives a request for radio resource management for a cell, and performs radio resource management for the cell based on said request for radio resource management. The request for radio resource management includes information indicating the type of reference signal to be used in the radio resource management. | 05-21-2015 |
20150156762 | METHOD AND APPARATUS FOR TRANSMITTING UPLINK DATA - Provided are a method and apparatus for transmitting uplink data. The method for transmitting data in a uplink subframe comprises the steps of: determining whether or not a hybrid automatic retransmission request-acknowledgement (HARQ-ACK) and uplink control information (UCI) are being simultaneously transmitted in the uplink subframe; selecting either the HARQ-ACK or UCI on the basis of the HARQ-ACK state for HARQ-ACK upon the occurrence of simultaneous transmission; and transmitting the selected HARQ-ACK or UCI in the uplink subframe. | 06-04-2015 |
20150156764 | METHOD FOR SIGNALING CONTROL INFORMATION, AND APPARATUS THEREFOR - The present invention relates to a wireless communication system. In detail, the invention relates to a method for a terminal to transmit a UCI in a carrier aggregation-based wireless communication system, and to an apparatus therefor, wherein the method involves the steps of: forming a first cell group having a PCell; forming a second cell group having one or more SCells; receiving one or more data in the second cell group; and transmitting HARQ-ACK information on the one or more data through a PUCCH, wherein, when the first and second cell groups are managed by an identical base station, the HARQ-ACK information is transmitted in the PCell, and, when the first and second cell groups are managed by different base stations, the HARQ-ACK information is transmitted in the second cell group. | 06-04-2015 |
20150163790 | METHOD FOR TRANSMITTING CONTROL SIGNAL FOR DEVICE-TO-DEVICE COMMUNICATION AND DEVICE THEREFOR - One embodiment of the present invention discloses a method for transmitting a control signal for device-to-device (D2D) communication with a second terminal by a first terminal in a wireless communication system, wherein the method is carried out by the first terminal and comprises the steps of: mapping control information for the D2D communication to a resource region for the D2D communication; and transmitting, to the second terminal, the mapped control information for the D2D communication with data for the D2D communication, wherein the control information for the D2D communication includes modulation and coding scheme (MCS) related information and hybrid automatic retransmission request (HARQ) related information, and the control information for the D2D communication can be mapped to at least one symbol except for symbol(s) to which a reference signal is mapped. | 06-11-2015 |
20150163830 | METHOD FOR TRANSMITTING RANDOM ACCESS PREAMBLE, AND WIRELESS DEVICE - Provided is a method and an apparatus for transmitting a random access preamble in a time division duplex (TDD)-based wireless communication system. A wireless device selects an UL subframe in which a random access preamble is to be transmitted in a first serving cell. If the next subframe following the selected UL subframe is a DL subframe and the length of the random access preamble exceeds the UL subframe, the random access preamble may be generated such that the length of the random access preamble may not exceed the UL subframe. | 06-11-2015 |
20150181406 | USER EQUIPMENT DETECTION METHOD FOR DIRECT COMMUNICATION BETWEEN USER EQUIPMENT AND USER EQUIPMENT IN WIRELESS COMMUNICATION SYSTEM, AND APPARATUS THEREFOR - Disclosed in the present application is a method for enabling user equipment to transmit and receive a discovery signal for direct communication between user equipment in a wireless communication system. Specifically, the method comprises the steps of: receiving, from a base station, information related to a plurality of configurations for the discovery signal through an upper layer; receiving, from the base station, downlink control information on a first sub-frame, comprising a field indicating one configuration among the plurality of configurations through a physical layer; and transmitting and receiving the discovery signal on the first frame and then on a second frame by using the indicated configuration. | 06-25-2015 |
20150181581 | METHOD FOR TRANSMITTING AND RECEIVING CONTROL INFORMATION AND APPARATUS FOR THE SAME - The present invention relates to a wireless communication and, more specifically, to a method for transmitting an HARQ) response by a UE in a wireless communication system, and an apparatus for the same. The method includes receiving an E-PDCCH signal on at least one of a plurality of enhanced physical downlink control channel (E-PDCCH) sets, each E-PDCCH set including a plurality of resources units indexed per E-PDCCH set; and transmitting the HARQ response using a physical uplink control channel (PUCCH) resource determined using the index of the first resource unit among one or more resource units carrying the E-PDCCH signal, wherein the index of the first resource unit is determined on the basis of the E-PDCCH set having the lowest index among the plurality of E-PDCCH sets when specific conditions are satisfied. | 06-25-2015 |
20150181587 | SCHEDULING METHOD FOR DEVICE-TO-DEVICE COMMUNICATION AND APPARATUS FOR SAME - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method for transmitting device-to-device (D2D) data and an apparatus therefor, the method comprising the steps of: receiving, from a base station, control information which includes a first resource allocation information item; transmitting, to a second terminal, a second physical downlink control channel (PDCCH) signal which includes a second resource allocation information item, while including the resource indicated by the second resource allocation information item in the resource indicated by the first allocation information item; and transmitting the D2D data to the second terminal by using the resource indicated by the second resource allocation information item. | 06-25-2015 |
20150181624 | METHOD AND TERMINAL FOR RANDOM ACCESS TO SMALL CELL - The present invention relates to a method for random access to a small cell by means of a terminal. The method can include the steps of: receiving a plurality of settings for a random access preamble; selecting one of the plurality of settings; and transmitting the random access preamble according to the one selected setting. Here, a resource on which the random access preamble can be transmitted can be provided in plurality in one subframe, and the preamble transmitted on each resource is distinguishable. | 06-25-2015 |
20150189627 | METHOD AND APPARATUS FOR TRANSCEIVING CONTROL SIGNAL - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and apparatus for receiving a control signal in a wireless communication system in which a plurality of cells are merged. The method comprises the steps of: receiving a signal indicating a deactivation of at least one cell from among the plurality of cells; and a step of deactivating said at least one cell. The deactivation-indicating signal indicates the deactivation of said at least one cell to all of a plurality of pieces of UE set to merge said at least one cell. | 07-02-2015 |
20150189642 | METHOD FOR TRANSRECEIVING CONTROL SIGNAL AND APPARATUS FOR SAME - The present invention relates to a wireless communication system. More specifically, the present invention relates to a method for transreceiving a control signal from a first terminal in the wireless communication system which supports device-to-device (D2D) communication and an apparatus for same, the method comprising the steps of: receiving from a base station a signal which triggers the D2D communication between the first terminal and a second terminal; transmitting data to the second terminal; receiving from the second terminal an acknowledgement/non-acknowledgement (ACK/NACK) signal with respect to the data; and transmitting to the base station an ACK/NACK delivery signal for delivering the ACK/NACK signal to the base station. | 07-02-2015 |
20150208208 | METHOD AND USER EQUIPMENT FOR RECEIVING BROADCAST/MULTICAST SERVICE RECEIVING, AND METHOD AND BASE STATION FOR TRANSMITTING BROADCAST/MULTICAST SERVICE - The broadcast/multicast service according to the present invention is transmitted/received in a partial frequency region rather than the entire system bandwidth of a cell. The user equipment of the present invention may receive information regarding the frequency region set in the cell for receiving the broadcast/multicast service and receive the broadcast/multicast service over the frequency region based on the information. | 07-23-2015 |
20150208361 | METHOD AND DEVICE FOR CONTROLLING TRANSMISSION POWER IN WIRELESS COMMUNICATION SYSTEM - In an embodiment according to the present invention, a method of controlling transmission power by a terminal in a wireless communication system includes: receiving information on a change in transmission power in a first time section; and estimating path attenuation and performing up-link transmission power control by using the estimated path attenuation, wherein if the estimation of the path attenuation is performed in a second time section following the first time section, information on the change in transmission power is considered when estimating the path attenuation. | 07-23-2015 |
20150208372 | METHOD AND USER EQUIPMENT FOR SYNCHRONIZING COMPONENT CARRIERS USED IN CARRIER AGGREGATION - According to the present invention, user equipment synchronizes a specific component carrier with an NCT-type component carrier with respect to time and/or frequency. The cell synchronization method for synchronizing predetermined cells by user equipment according to the present invention may include receiving reference cell information relating to a first synchronization reference cell for the predetermined cells, acquiring first synchronization information from the first synchronization cell based on the reference cell information, and performing the synchronization of the predetermined cells based on the first synchronization information. | 07-23-2015 |
20150208386 | METHOD FOR SIGNALING CONTROL INFORMATION, AND APPARATUS THEREFOR - The present invention relates to a wireless communication system, and more particularly, to a method for a terminal to transmit and receive control information and/or a response signal in a carrier aggregation-based wireless communication system, and to an apparatus therefor, wherein the method includes the steps of: constituting a first cell group having a PCell; constituting a second cell group having at least one SCell; and carrying out a process for transmitting and receiving specific cell-related control information and/or a response signal. The control information and/or the response signal are transmitted and received on the first cell group or the second cell group in the event the first cell group and the second cell group are managed by the same base station. The control information and/or the response signal are transmitted and received on only the first cell group or the second cell group depending on the type of the control information in the event the first cell group and the second cell group are managed by different base stations. | 07-23-2015 |
20150208407 | METHOD FOR TRANSMITTING/RECEIVING SIGNAL AND DEVICE THEREFOR - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method comprising: setting a first cell having a first TDD UL-DL configuration and a second cell having a second TDD UL-DL configuration; receiving a PHICH signal in a subframe #(n−L) of the first cell, or receiving a PDCCH signal in a subframe #(n−K) of the first cell; and transmitting a PUSCH signal in a subframe #n of the second cell, corresponding to the PHICH signal or the PDCCH signal, wherein the relationship between the subframes #(n−L), #(n−K), and #n is determined in consideration of a parameter value set in a specific TDD UL-DL configuration, which is the TDD UL-DL configuration having the least number of UL subframes from TDD UL-DL configuration(s), in which subframes set as UL in the first or second cell are all set as ULs. | 07-23-2015 |
20150215905 | METHOD AND APPARATUS FOR TRANSRECEIVING DOWNLINK SIGNAL BY CONSIDERING ANTENNA PORT RELATIONSHIP IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more specifically, disclosed are a method and an apparatus for transmitting or receiving a downlink signal by considering an antenna port relationship. A method for user equipment decoding an enhanced physical downlink control channel (EPDCCH) in the wireless communication system, according to one embodiment of the present invention, comprises the steps of: determining from a downlink subframe a reference element (RE) on which the EPDCCH is mapped; and decoding the EPDCCH based on the RE on which the EPDCCH is mapped. At least one EPDCCH-physical resource block (PRB)-set for monitoring the EPDCCH can be established for the user equipment, wherein a parameter set for each of the at least one EPDCCH-PRB-set is indicated by an upper layer, and the RE on which the EPDCCH is mapped can be determined based on the parameter set indicated by the upper layer. | 07-30-2015 |
20150215906 | METHOD AND APPARATUS FOR TRANSRECEIVING DOWNLINK SIGNAL BY CONSIDERING ANTENNA PORT RELATIONSHIP IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more specifically, disclosed are a method and an apparatus for transmitting or receiving a downlink signal by considering an antenna port relationship. A method for user equipment receiving a physical downlink shared channel (PDSCH) signal in the wireless communication system, according to one embodiment of the present invention, comprises the steps of: determining a start symbol index of the PDSCH from a downlink subframe; and receiving the PDSCH signal based on the start symbol index, wherein the PDSCH can be scheduled by means of downlink control information (DCI) which is received through a physical downlink control channel (PDCCH) or an enhanced PDCCH (EPDCCH). When the DCI is comprised according to DCI format 1A, which is transmitted through the EPDDCH, and the downlink subframe is a non-multicast broadcast single frequency network (MBSFN) subframe, the start symbol index can be determined depending on an EPDCCH start symbol value which is established by an upper layer. | 07-30-2015 |
20150230211 | METHOD FOR RECEIVING DOWNLINK SIGNAL, AND USER DEVICE; AND METHOD FOR TRANSMITTING DOWNLINK SIGNAL, AND BASE STATION - In the present invention, a demodulation reference signal is transmitted using a plurality of settings in which demodulation reference signals occupy different positions in at least a density or time-frequency resource region of the demodulation reference signals. A base station can transmit, to the user device, information indicating a setting related to a downlink signal or a setting related to an uplink signal from among the plurality of settings, and the user device can receive the demodulation reference signal with the downlink signal or transmit the demodulation reference signal With the uplink signal according to the indicated setting. | 08-13-2015 |
20150230239 | METHOD FOR TRANSMITTING CONTROL INFORMATION AND A DEVICE THEREFOR - The present invention relates to a wireless communication system. More specifically, the present invention relates to a method for transmitting uplink control information and to a device therefor, and relates to a method comprising the steps of: selecting one uplink control channel resource corresponding to a plurality of HARQ-ACKs, from a plurality of uplink control channel resources; and transmitting a bit value corresponding to the plurality of HARQ-ACKs, by using the selected uplink control channel resource. The present invention also relates to a device for the method. | 08-13-2015 |
20150236834 | METHOD FOR MAKING A TERMINAL SEND AN UPLINK ACK/NACK SIGNAL IN A WIRELESS COMMUNICATION SYSTEM USING CARRIER AGGREGATION TECHNIQUES AND APPARATUS FOR THE SAME - The present application discloses a method for making a terminal send an uplink ACK (acknowledgement)/NACK (negative ACK) signal in a wireless communications system. Specifically, the method includes the steps of: receiving at least one downlink data signal from a network through at least one of a first and second cells; generating an ACK/NACK signal corresponding to the at least one downlink data signal; and sending the ACK/NACK signal through one of the first and the second cells, wherein the structure of the ACK/NACK signal is determined based on the number of the downlink data signals, and if the number of the downlink data signals is plural, the structure of the ACK/NACK signal is first type, and if receiving one downlink data signal through the first cell only or the second cell only, the structure of the ACK/NACK signal is second type. | 08-20-2015 |
20150236836 | METHOD AND APPARATUS FOR TRANSMITTING ACK/NACK FOR DOWNLINK TRANSMISSION IN WIRELESS COMMUNICATION SYSTEM - A method for receiving ACK/NACK information transmitted in response to a downlink transmission. The method according to one embodiment includes transmitting one or more relay physical downlink control channels (R-PDCCHs); transmitting the downlink transmission according to the one or more R-PDCCHs in a downlink subframe set including M downlink subframes, where M is a positive integer; and receiving ACK/NACK information for the downlink transmission in the downlink subframe set. The downlink subframe set and the uplink subframe are configured for a time division duplex (TDD). The one or more R-PDCCHs are control channels different from a physical downlink control channel (PDCCH). N physical uplink control channel (PUCCH) resources respectively having indexes | 08-20-2015 |
20150237611 | METHOD AND DEVICE FOR TRANSMITTING CONTROL INFORMATION - The present invention relates to a wireless communication system. Specifically, the present invention relates to a method for transmitting uplink control information and to an apparatus for the same. The present invention relates to a method and to a device for said method which comprises the steps of selecting one uplink control channel resource corresponding to a plurality of HARQ-ACKs from among a plurality of uplink control channel resources, and transmitting a bit value corresponding to the plurality of HARQ-ACKs by using the selected uplink control channel resource. | 08-20-2015 |
20150237619 | METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION - A method of receiving uplink control information at a communication apparatus in a wireless communication system configured for Time Division Duplex (TDD) operations and having a plurality of cells is described. A first set of at least one of one or more Physical Downlink Control Channel (PDCCH) signals and one or more Physical Downlink Shared Channel (PDSCH) signals are transmitted within M downlink subframes, where M≧1. A second set of at least one of one or more PDCCH signals and one or more PDSCH signals are transmitted within N downlink subframes, where N≧1. Acknowledgment information is received on an uplink subframe, the acknowledgment information including first acknowledgment information corresponding to the first set and second acknowledgment information corresponding to the second set. | 08-20-2015 |
20150245344 | METHOD AND USER DEVICE FOR RECEIVING DOWNLINK SIGNAL, AND METHOD AND BASE STATION FOR TRANSMITTING DOWNLINK SIGNAL - The present invention relates to a method and user device for transmitting first ACK/NACK information on a first cell group including a primary cell and one or more secondary cells from among a plurality of serving cells on a physical uplink control channel (PUCCH) of a specific cell in the first cell group, and to a method and base station for receiving the first ACK/NACK information on the PUCCH of the specific cell. When the first ACK/NACK information includes only ACIQNACK for the primary cell, the specific cell is the primary cell, and, when the first ACK/NACK information includes ACK/NACK on at least one of the one or more secondary cells, the specific cell is a secondary cell from among the one or more secondary cells of the first cell group that is set for the ACK/NACK transmission. | 08-27-2015 |
20150249972 | METHOD AND USER DEVICE FOR RECEIVING UPLINK CONTROL INFORMATION, AND METHOD AND BASE STATION FOR TRANSMITTING UPLINK CONTROL INFORMATION - The base station of the present invention notifies a user device of a first set of cells and a set of parameters corresponding respectively to the cells of the first set of cells, and notifies the user device of a second set of cells that is a subset of the first set of cells and that is associated with the user device. The user device may receive a downlink signal or transmit an uplink signal by sing one of the sets of parameters associated with the second set of cells. | 09-03-2015 |
20150249975 | METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, particularly, a method in which a terminal transmits control information in a CA-based wireless communication system and an apparatus for the method, the method comprising: configuring a first cell and a second cell having different subframe configurations, wherein the second cell has any one of UL-DL configuration #0 to #6; receiving a DC) format including a DAI field, for the second cell; and transmitting HARQ-ACK information relating to the downlink DCI format. For HARQ-ACK timing, in cases where a reference UL-DL configuration applied to the second cell is any one of UL-DL configurations #1 to #6, the DAI field is used in a process of transmitting the HARQ-ACK information. For HARQ-ACK timing, in cases where a reference UL-DL configuration applied to the second cell is #0, the DAI field is not used in a process of transmitting the HARQ-ACK information. | 09-03-2015 |
20150249980 | METHOD AND USER DEVICE FOR RECEIVING UPLINK CONTROL INFORMATION, AND METHOD AND BASE STATION FOR TRANSMITTING UPLINK INFORMATION - The present invention determines a PUCCH resource based on which serving cell ACK/NACK information is related to, when a user device set as a plurality of serving cells transmits the ACK/NACK information. Moreover, if a PUCCH transmission time matches with a PUSCH transmission time, the present invention does not piggy back ACK/NACK information to PUSCH but transmits the ACK/NACK information through PUCCH. | 09-03-2015 |
20150257135 | METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method in which a terminal transmits control information in a CA-based wireless communication system and to an apparatus for the method, the method comprising: a step of configuring a first cell and a second cell having different subframe configurations, the second cell has UL-DL configuration #0; a step of receiving a downlink control information (DCI) format including an N-bit field (N>1), for the second cell; and a step of transmitting a physical uplink shared channel (PUSCH) signal corresponding to the downlink DCI format through a subframe. The N-bit field indicates either an uplink (UL) index or a downlink assignment index (DAI). For PUSCH timing, in cases where a reference UL-DL configuration applied to the second cell is any one of UL-DL configurations #1 to #6, the N-bit field indicates the DAI. | 09-10-2015 |
20150280876 | METHOD AND APPARATUS FOR TRANSMITTING DATA, AND METHOD AND APPARATUS FOR TRANSMITTING DATA - The present invention provides a method and apparatus for transmitting data and a method and apparatus for receiving data, wherein said methods transmit/receive a reference signal in sub-frames bundled for data transmission/reception using at least an identical precoding matrix, an identical reference signal sequence, an identical reference signal generating identifier, or an identical reference signal scrambling sequence. | 10-01-2015 |
20150296506 | METHOD FOR TRANSMITTING CHANNEL STATE INFORMATION IN WIRELESS ACCESS SYSTEM - Channel State Information (CSI) is reported by a user equipment (UE) in a wireless access system which supports carrier aggregation. A first type CSI for a first component carrier (CC) of two or more downlink (DL) CCs is measured. A second type CSI for a second CC of the two or more downlink (DL) CCs is measured. The first type CSI only is reported, when a collision of a report of the first type CSI with a report of the second CSI type is occurred in a same subframe. In addition, the first type CSI includes (1) a Rank indicator (RI) and a first Precoding Matrix Indicator (PMI), (2) only the RI, or (3) only the first PMI, and the second type CSI includes (1) a Wideband Channel Quality Indicator (WB-CQI) and a second PMI, (2) the WB-CQI and the first PMI, or (3) only the WB-CQI. | 10-15-2015 |
20150296509 | METHOD FOR TRANSCEIVING CONTROL SIGNAL, AND APPARATUS THEREFOR - The present invention relates to a method for transmitting a signal by a terminal in a wireless communication system in which a plurality of cells including first and second cells are combined, and to an apparatus therefor. The method includes the steps of: receiving a first physical downlink shared channel (PDSCH) through a first cell and a second PDSCH through a second cell in a specific time period; and transmitting a control signal providing instructions for an acknowledgement (ACK)/negative acknowledgment (NACK)response to the first PDSCH and an ACK/NACK response to the second PDSCH, wherein when the first PDSCH includes a random access response, the ACK/NACK response to the first PDSCH or the first cell is determined as a discontinuous transmission (DTX) or NACK. | 10-15-2015 |
20150304996 | METHOD AND DEVICE FOR TRANSMITTING AND RECEIVING CONTROL SIGNAL - The present invention relates to a method and device for transmitting and receiving a control signal, and the method includes: receiving control information including scheduling information for data transmission and receipt through higher layer signaling; and receiving a trigger signal triggering data scheduling on a terminal using the scheduling information, wherein the trigger signal may be received through a physical channel that carries a hybrid automatic repeat request (HARQ)-acknowledgment (ACK) response for uplink data transmission. | 10-22-2015 |
20150305021 | METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method for receiving a downlink control signal in a TDD-based wireless communication system, and to an apparatus therefor. The method comprises receiving a downlink signal via a downlink interval in a specific frame including the downlink interval, a guard interval and an uplink interval. A combination of the downlink interval, the guard interval and the uplink interval is given using configuration information on the specific subframe. When the configuration information is given such that the length of the downlink interval is larger than a specific value, detecting a first type of PDCCH is performed in the specific subframe. When the configuration information is given such that the length of the downlink interval is equal to or smaller than the specific value, detecting the first type of PDCCH is skipped in the specific subframe. | 10-22-2015 |
20150327252 | METHOD FOR TRANSMITTING CONTROL INFORMATION AND APPARATUS FOR SAME - A wireless communication system is disclosed. A method for transmitting uplink control information in a wireless communication system supporting carrier aggregation and operating in TDD includes: generating a first HARQ-ACK (hybrid automatic repeat request-acknowledgement) set for a first cell using a value M; generating a second HARQ-ACK set for a second cell using the value M; and transmitting a bit value corresponding to a third HARQ-ACK set including the first HARQ-ACK set and the second HARQ-ACK set in an uplink subframe n, wherein M=max(M1, M2), max(M1, M2) representing a value being equal to or larger than not smaller between M1 and M2, wherein M1 corresponds to the number of downlink subframes corresponding to the uplink subframe n in the first cell, and M2 corresponds to the number of downlink subframes corresponding to the uplink subframe n in the second cell, wherein the first cell and the second cell have different UL-DL configurations. | 11-12-2015 |
20150333879 | METHOD AND APPARATUS FOR ACQUIRING UPLINK SYNCHRONIZATION IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method for acquiring uplink synchronization in a terminal having a plurality of cells in a carrier aggregation-based wireless communication system and an apparatus therefor, the method comprising the steps of: transmitting a random access preamble on a first cell; receiving a random access response message including an uplink timing adjustment value for the first cell after transmitting the random access preamble; and performing uplink transmission in the first cell by using the uplink timing adjustment value, wherein a transmission time point of the random access preamble is given based on a specific time point related to a second cell. | 11-19-2015 |
20150334741 | METHOD AND DEVICE FOR TRANSMITTING CONTROL INFORMATION - A method for transmitting uplink control information and to an apparatus therefor. The method includes: selecting one uplink control channel resource corresponding to a plurality of HARQ-ACKs from among a plurality of uplink control channel resources; and transmitting a bit value corresponding to the plurality of HARQ-ACKs using the selected uplink control channel resource. | 11-19-2015 |
20150358122 | METHOD FOR TRANSRECEIVING SIGNALS AND APPARATUS FOR SAME - The present invention relates to a wireless communication system. More specifically, the present invention relates to a method for transmitting an uplink signal in the wireless communication system supporting carrier aggregation (CA), and to the apparatus for same, the method comprising the steps of: setting a scheduling cell, which has a first uplink-downlink (UL-DL) configuration, and setting a scheduled cell, which has a second TDD UL-DL configuration; and carrying out a HARQ process from the scheduled cell based on the number of HARQ processes for the scheduled cell. | 12-10-2015 |
20150358125 | METHOD FOR TRANSMITTING AND RECEIVING CONTROL INFORMATION AND APPARATUS FOR THE SAME - The present invention relates to a wireless communication and, more specifically, to a method for transmitting an HARQ) response by a UE in a wireless communication system, and an apparatus for the same. The method includes receiving an E-PDCCH signal on at least one of a plurality of enhanced physical downlink control channel (E-PDCCH) sets, each E-PDCCH set including a plurality of resources units indexed per E-PDCCH set; and transmitting the HARQ response using a physical uplink control channel (PUCCH) resource determined using the index of the first resource unit among one or more resource units carrying the E-PDCCH signal, wherein the index of the first resource unit is determined on the basis of the E-PDCCH set having the lowest index among the plurality of E-PDCCH sets when specific conditions are satisfied. | 12-10-2015 |
20150358948 | METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM - A method for operating a user equipment (UE) in a wireless communication system, and the UE therefore are discussed. The method according to one embodiment includes receiving a subframe including a plurality of orthogonal frequency division multiplexing (OFDM) symbols; and monitoring a plurality of search spaces configured on the subframe so as to receive control information indicated to the UE. The plurality of search spaces are allocated in a first control channel region or a second control channel region, the first control channel region including one or more consecutive OFDM symbols and the second control channel region including one or more consecutive OFDM symbols not overlapped with the first control channel region. Search spaces corresponding to Control Channel Element (CCE) aggregation level 4 and 8 are allocated to the first control channel region, if a UE is configured for Enhanced-Physical Control Channel (E-PDCCH) monitoring in the subframe. | 12-10-2015 |
20150365969 | METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system. In particular, the present invention relates to a method and apparatus for transmitting control information by means of a terminal in a CA-based wireless communication system, including the steps of: forming first and second cells that include different subframe configurations, wherein the second cell includes TDD UL-DL configuration #0; receiving a UL grant by means of the first cell; and transmitting data corresponding to the UL grant by means of the second cell. | 12-17-2015 |
20160007343 | METHOD AND DEVICE FOR UPLINK RESOURCE ALLOCATION - A method for receiving an uplink signal in a wireless communication system, and a device therefore. The method according to one embodiment includes transmitting a control channel signal including a resource allocation (RA) field; and receiving an uplink signal. A size of the RA field is represented by an expression including RASizeA and RASizeB. RASizeA is a first number of bits required for representing a resource indication value (RIV) corresponding to a starting resource block (RB) and a length of contiguously allocated RBs within a given uplink bandwidth. RASizeB is a second number of bits required for representing a combinatorial index r corresponding to 4 indexes used to indicate a start resource block group (RBG) index and an end RBG index of a first RB set and a start RBG index and an end RBG index of a second RB set within the given uplink bandwidth. | 01-07-2016 |
20160044706 | COMMUNICATION METHOD TAKING CARRIER TYPE INTO CONSIDERATION, AND APPARATUS THEREFOR - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and apparatus for a terminal to receive a downlink signal in a wireless communication system. The method includes the steps of: receiving a downlink signal through a downlink period in a subframe including the downlink period, a gap period, and an uplink period; and demodulating the downlink signal, wherein the length of the downlink period is less than or equal to half of the subframe. When the downlink signal is received on a first type of carrier, the downlink signal is demodulated using a first cell-common reference signal. When the downlink signal is received on a second type of carrier, the downlink signal is demodulated using a terminal-specific reference signal. | 02-11-2016 |
20160057720 | METHOD FOR TRANSMITTING REFERENCE SIGNAL AND APPARATUS USING THE METHOD - The method of transmitting the reference signal includes receiving a synchronization signal in a subframe including contiguous first slot and second slot, and receiving a reference signal in the subframe, in which each of the first slot and the second slot includes a plurality of RBs and a plurality of OFDM symbols, the synchronization signal includes a PSS and a SSS, the PSS is received in the last OFDM symbol of the first slot, the SSS is received in a previous symbol before the last OFDM symbol of the first slot, a cell identifier is acquired based on the PSS and the SSS, the synchronization signal is received in center 6 RBs among the plurality of RBs, and the reference signal is received in at least one OFDM symbol among the plurality of OFDM symbols in the second slot through the center 6RB. | 02-25-2016 |
20160065346 | METHOD FOR TRANSMITTING CONTROL INFORMATION AND APPARATUS THEREFOR - A method for transmitting uplink control information by a user equipment (UE) configured with a plurality of cells including a primary cell and a secondary cell in a wireless communication system is discussed. The method includes identifying, by the UE, a Hybrid Automatic Repeat reQuest-Acknowledgement (HARQ-ACK)(0) and a HARQ-ACK(1); and transmitting, by the UE, bits b(0)b(1) using a Physical Uplink Control Channel (PUCCH) resource among a plurality of PUCCH resources based on the HARQ-ACK(0) and the HARQ-ACK(1) to a base station (BS) for identifying the HARQ-ACK(0) and the HARQ-ACK(1). The b(0)b(1) and the PUCCH resource are given according to a relation including Table 1, where the HARQ-ACK(0) indicates an ACK/Negative ACK (ACK/NACK)/Discontinuous Transmission (DTX) response to a data block related to the primary cell, and the HARQ-ACK(1) indicates an ACK/NACK/DTX response to a data block related to the secondary cell. | 03-03-2016 |
20160073386 | METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method for receiving a downlink control signal in a TDD-based wireless communication system, and to an apparatus therefor. The method comprises receiving a downlink signal via a downlink interval in a specific frame including the downlink interval, a guard interval and an uplink interval. A combination of the downlink interval, the guard interval and the uplink interval is given using configuration information on the specific subframe. When the configuration information is given such that the length of the downlink interval is larger than a specific value, detecting a first type of PDCCH is performed in the specific subframe. When the configuration information is given such that the length of the downlink interval is equal to or smaller than the specific value, detecting the first type of PDCCH is skipped in the specific subframe. | 03-10-2016 |
20160087772 | METHOD FOR TRANSMITTING CONTROL INFORMATION AND A DEVICE THEREFOR - The present invention relates to a wireless communication system. More specifically, the present invention relates to a method for transmitting uplink control information and to a device therefor, and relates to a method comprising the steps of: selecting one uplink control channel resource corresponding to a plurality of HARQ-ACKs, from a plurality of uplink control channel resources; and transmitting a bit value corresponding to the plurality of HARQ-ACKs, by using the selected uplink control channel resource. The present invention also relates to a device for the method. | 03-24-2016 |
20160095100 | METHOD AND APPARATUS FOR ALLOCATION OF DISCONTINUOUS UPLINK RESOURCE - A method for a communication apparatus to transmit an uplink signal in a wireless communication system. The communication apparatus receives a control channel signal including resource allocation information for two or more non-consecutive resource block sets. Each resource block set includes a single resource block group (RBG) or at least two consecutive RBGs. The communication apparatus transmits the uplink signal in accordance with the control channel signal for data transmission. The resource allocation information uses a combinatorial index corresponding to at least four indices to indicate the two or more non-consecutive resource block sets. | 03-31-2016 |
20160095106 | METHOD FOR TRANSMITTING CONTROL INFORMATION AND APPARATUS FOR SAME - A method for transmitting uplink control information by a user equipment in a wireless communication system operating in time division duplex (TDD), the user equipment being configured with a plurality of cells having different uplink-downlink (UL-DL) configurations; and a communication apparatus therefore are discussed. The method according to one embodiment includes receiving at least one downlink signal on at least one cell; and transmitting the uplink control information including at least one per-cell hybrid automatic repeat request acknowledgement (HARQ-ACK) bit via a physical uplink shared channel (PUSCH). Based on a reference UL-DL configuration, a number of the at least one per-cell HARQ-ACK bit is determined using a smallest value of W and Mc, W denoting a value indicated by 2-bit downlink assignment index (DAI) information included in downlink control information corresponding to the PUSCH, and Mc denoting a number of downlink subframes corresponding to the uplink subframe on the cell. | 03-31-2016 |
20160112174 | METHOD AND APPARATUS FOR TRANSMITTING ACK/NACK FOR DOWNLINK TRANSMISSION IN WIRELESS COMMUNICATION SYSTEM - A method for transmitting ACK/NACK information in response to a downlink transmission in a relay node (RN) of a wireless communication system; and the RN therefore are discussed. The method according to one embodiment includes receiving downlink transmissions in downlink subframes; and transmitting the ACK/NACK information for the downlink transmissions in one uplink subframe associated with the downlink subframes. The downlink subframes and the uplink subframe are configured for a time division duplex (TDD). Physical uplink control channel (PUCCH) resources are configured by a higher layer, and each of the PUCCH resources corresponds to each of the downlink subframes. Each of the downlink subframes associated with the one uplink subframe is sequentially mapped to each of the PUCCH resources starting from a downlink subframe among the downlink subframes that is closest in time to the one uplink subframe. | 04-21-2016 |
20160119923 | METHOD FOR TRANSMITTING/RECEIVING SIGNAL AND DEVICE THEREFOR - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method comprising: setting a first cell having a first TDD UL-DL configuration and a second cell having a second TDD UL-DL configuration; receiving a PHICH signal in a subframe #(n−L) of the first cell, or receiving a PDCCH signal in a subframe #(n−K) of the first cell; and transmitting a PUSCH signal in a subframe #n of the second cell, corresponding to the PHICH signal or the PDCCH signal, wherein the relationship between the subframes #(n−L), #(n−K), and #n is determined in consideration of a parameter value set in a specific TDD UL-DL configuration, which is the TDD UL-DL configuration having the least number of UL subframes from TDD UL-DL configuration(s), in which subframes set as UL in the first or second cell are all set as ULs. | 04-28-2016 |
Patent application number | Description | Published |
20110090945 | METHOD AND APPARATUS FOR COOPERATIVE MIMO TRANSMISSION OPERATION IN MULTICELL WIRELESS NETWORK - A method and apparatus of configuring a multi-cell precoding matrix for a multiple input multiple output (MIMO) operation in a wireless communication system in which a plurality of base stations participate in cooperative communication is provided. A multi-cell precoding matrix is configured using one or more single-cell precoding matrices, and wherein coefficients to be multiplied by the single-cell precoding matrices satisfy a condition in which the product between the multi-cell precoding matrix and a Hermitian matrix of the multi-cell precoding matrix is a unitary matrix. According to the embodiment of the present invention, it is not necessary for all base stations to perfectly know channel information. In addition, a feedback overhead is not high, and complexity is low. | 04-21-2011 |
20120015680 | METHOD AND APPARATUS FOR DATA TRANSMISSION BASED ON MULTIPLE CELL COLLABORATION - The method for channel information feedback based on multiple cell collaboration comprises a step wherein first channel quality information including the channel information between the terminal and base station is transmitted to the base station; a step wherein after the first channel quality information is sent; a channel quality information request message is received from the base station; and a step wherein in response to the channel quality information request message, second channel quality information is sent, including channel information between the terminal and the base station and adjacent base stations. | 01-19-2012 |
20120039285 | METHOD AND APPARATUS FOR TRANSMITTING HARQ ACK/NACK SIGNAL IN MULTI-ANTENNA SYSTEM - A method and apparatus of transmitting an ACK/NACK signal for a hybrid automatic repeat request (HARQ) in a wireless communication system is provided. A first ACK/NACK resource index and a second ACK/NACK resource index based on resources used to transmit a downlink control channel is determined. An ACK/NACK signal for a downlink transport block is transmitted through a plurality of antennas using first ACK/NACK resources obtained from the first ACK/NACK resource index and second ACK/NACK resources obtained from the second ACK/NACK resource index. An HARQ ACK/NACK signal can be reliably transmitted through a plurality of antennas. | 02-16-2012 |
20120057529 | APPARATUS AND METHOD FOR PERFORMING A HARQ IN A MULTICARRIER SYSTEM - Provided are a method and apparatus of performing a HARQ in a multiple carrier system. A receiver determines the size of a soft buffer to be used in an effective HARQ process on the basis of the maximum number of effective HARQ processes over a plurality of component carriers and stores the received transport block in the soft buffer. The present invention enables the performance of a HARQ in an efficient manner by using multiple carriers in the event the size of the soft buffer is limited. | 03-08-2012 |
20120082102 | METHOD FOR INDICATING PRECODING MATRIX INDICATOR IN UPLINK MIMO SYSTEM WITH BASED ON SC-FDMA - A method of transmitting PMI (precoding matrix indicator) information in an uplink MIMO system is disclosed. The present invention includes the steps of receiving channel information from a user equipment and transmitting information on a resource allocated to the user equipment in uplink transmission and PMI information indicating a precoding matrix to apply to a region of the resource among a plurality of precoding matrices to the user equipment based on the received channel information, wherein the resource allocated to the user equipment is allocated by a bundle unit of a prescribed number of subcarriers, wherein each of a plurality of the precoding matrices are applied to regions generated from dividing a whole frequency band into a prescribed number of regions, respectively, and wherein the precoding matrix applied to the resource among a plurality of the precoding matrices has a maximum area resulting from overlapping a frequency band occupied by the allocated resource with a frequency band having the precoding matrix applied thereto. | 04-05-2012 |
20120082149 | METHOD FOR TRANSMITTING FEEDBACK INFORMATION AND DATA USING A PRECODING CODEBOOK FOR MULTICELL COOPERATIVE COMMUNICATION IN A WIRELESS COMMUNICATION SYSTEM - Disclosed are a feedback-transmitting method and data-transmitting method, and a method for generating a codebook that can be used in a system such as LTE-A. When multiple base stations operate in a cooperative mode, using a codebook generated according to the present invention, an existing codebook for single cell transmission can be used to generate a codebook for cooperative transmission. | 04-05-2012 |
20120087331 | RESOURCE MAPPING METHOD AND APPARATUS IN WIRELESS COMMUNICATION SYSTEM - The present invention provided a method and an apparatus for mapping radio resources in a wireless communication system. A terminal determines the size of an RBG (resource block group of a f basic band according to the number of RBs (resource blocks) within the basic band in the overall bands which include the fundamental band and an aggregated segment band. The size of an RBG of the aggregated segment band is determined on the basis of the size of the RBG of the basic band. | 04-12-2012 |
20120113946 | METHOD AND APPARATUS FOR PERFORMING HARQ IN MULTIPLE CARRIER SYSTEM - A method and apparatus for performing hybrid automatic repeat request (HARQ) in a multiple carrier system are provided. A user equipment performs an HARQ process in a source component carrier. When the user equipment receives a management message regarding a transfer from the source component carrier to a target component carrier, the user equipment subsequently performs the HARQ process in the target component carrier. | 05-10-2012 |
20120120908 | METHOD AND APPARATUS FOR RECEIVING RECEPTION ACKNOWLEDGEMENT IN WIRELESS COMMUNICATION SYSTEM - The present invention provides a method and an apparatus for receiving reception acknowledgement for HARQ (Hybrid Automatic Repeat Request) in a wireless communication system. A terminal receives, from a base station, an uplink resource allocation that includes information on a plurality of allocated RBs (Resource Blocks) within a subframe that includes the plurality of RBs, and transmits uplink transmission blocks to a PUSCH (Physical Uplink Shared Channel) by using the plurality of allocated RBs on the subframe. The terminal receives, from the base station, ACk/NACK signals on a PHICH (Physical Hybrid-ARQ Indicator Channel). PHICH resources used on the PHICH are identified by the lowest index among indexes of the plurality of allocated RBs, and at least two of the indexes of the plurality of RBs are linked by being overlapped with the same PHICH resource. | 05-17-2012 |
20120142365 | METHOD AND APPARATUS FOR MITIGATING INTERFERENCE IN A WIRELESS COMMUNICATION SYSTEM SUPPORTNG HETEROGENEOUS NETWORKS - A method and apparatus for mitigating interference in a wireless communication system supporting heterogeneous networks are disclosed. When the wireless communication system includes a first network and a second network, the method includes generating information indicating whether each of uplink component carriers is used for transmission of control information in the first network, and transmitting the information to a UE. A component carrier used for transmission of control information in the first network is different from a component carrier used for transmission of control information in the second network. | 06-07-2012 |
20120170533 | METHOD AND APPARATUS FOR CONTROLLING TRANSMIT POWER IN WIRELESS COMMUNICATION SYSTEM - A method and apparatus of controlling transmit power in a wireless communication system is provided. A wireless apparatus selects one transmit mode among a plurality of transmit modes, and determines the transmit power on the basis of the selected transmit mode. The wireless apparatus transmits an uplink channel by using the transmit power. | 07-05-2012 |
20120177000 | METHOD AND APPARATUS FOR RECEIVING DOWNLINK DATA IN MULTI-CARRIER SYSTEM - A method and an apparatus for receiving downlink data in a multi-carrier system are provided. A terminal receives a downlink grant on a physical downlink control channel (PDCCH) via a first component carrier, and determines a transmission power of a physical downlink shared channel (PDSCH) depending on whether a control channel exists in each orthogonal frequency division multiplexing (OFDM) symbol of a subframe of a second component carrier that is indicated by the downlink grant. Based on the transmission power of the PDSCH, the terminal receives downlink data on the PDSCH indicated by the downlink grant via the second component carrier. When a control channel and a data channel coexist in the same OFDM symbol, the reliability of receiving the control channel can be increased. | 07-12-2012 |
20120207123 | METHOD AND APPARATUS FOR TRANSMITTING RECEPTION ACKNOWLEDGEMENT INFORMATION IN WIRELESS COMMUNICATION SYSTEM - Disclosed are a method and an apparatus for transmitting reception acknowledgement for an HARQ (hybrid automatic repeat request) in a wireless communication system. A terminal receives the information on downlink resource allocation through at least one downlink carrier among plural downlink carriers. In addition, the terminal receives a downlink transmission block through a downlink shared channel indicated by the downlink resource allocation. The terminal transmits an ACK/NACK signal for the downlink transmission block through an uplink control channel. If at least one downlink carrier is a primary carrier, the uplink control channel uses a primary resource. Otherwise, the uplink control channel uses a secondary resource. | 08-16-2012 |
20120213187 | UPLINK CONTROL INFORMATION TRANSMISSION METHOD AND APPARATUS IN MULTICARRIER SYSTEM - A method for transmitting uplink control information of a user equipment in a multi-carrier system is provided. The method includes: transmitting each of acknowledgement/not-acknowledgement (ACK/NACK) for downlink data transmitted by a base station through multiple downlink component carriers; and transmitting channel state information indicating a state of a downlink channel to the base station, wherein each of the ACK/NACK and the channel state information are allocated to the same uplink control channel resource in a subframe, and if each of the ACK/NACK and the channel state information are reserved to be transmitted on the same subframe, each of the ACK/NACK only is transmitted. Accordingly, a user equipment can transmit uplink control information while preserving a single-carrier property of an uplink signal in a multi-carrier system using carrier aggregation. | 08-23-2012 |
20120269153 | METHOD AND APPARATUS FOR REPORTING A CHANNEL QUALITY IN A WIRELESS COMMUNICATION SYSTEM - The present invention provided a method and apparatus for reporting a channel quality in a wireless communication system. A terminal receives an uplink grant from a base station via one of a plurality of downlink component carriers (CCs). The uplink grant includes a channel quality indicator (CQI) request for instructing uplink allocation and CQI reporting. The terminal reports the CQI of the downlink CC being linked to the base station. The downlink CC being linked is one of the plurality of downlink CCs, which is linked to the uplink CC for which the uplink allocation is scheduled. | 10-25-2012 |
20120294248 | METHOD AND DEVICE FOR MONITORING CONTROL CHANNEL IN A WIRELESS COMMUNICATION SYSTEM - Discloses are a method and device for monitoring a control channel in a wireless communication system. A user equipment receives a CFI (control format indicator), indicating a size of a control region within a subframe, via a first downlink control channel and confirms whether or not an extended control region is present in the subframe. If the extended control region is present in the subframe, the user equipment monitors a PDCCH (physical downlink control channel) within the control region and the extended control region. | 11-22-2012 |
20120294251 | METHOD AND APPARATUS FOR UPLINK TRANSMISSION IN WIRELESS COMMUNICATION SYSTEM - Provided are a method and apparatus for uplink transmission in a wireless communication system. A terminal sets an uplink transmission mode for a plurality of component carriers, multiplexes an uplink transport block and uplink control information in accordance with the uplink transmission mode, and transmits the multiplexed control information through one of the plurality of component carriers on an uplink channel. | 11-22-2012 |
20120300722 | APPARATUS AND METHOD OF TRANSMITTING RECEPTION ACKNOWLEDGEMENT IN WIRELESS COMMUNICATION SYSTEM - A method and apparatus for transmitting reception acknowledgment for hybrid automatic repeat request (HARQ) in a wireless communication system are provided. A user equipment receives a plurality of downlink resource allocations on a plurality of downlink control channels by using a plurality of downlink carriers, and receives a plurality of downlink transfer blocks on a plurality of downlink shared channels indicated by the plurality of downlink resource allocations. The user equipment determines a plurality of acknowledgment (ACK)/negative acknowledgment (NACK) resource indices based on a plurality of resource indices obtained from downlink resources which use the plurality of downlink control channels. The user equipment transmits ACK/NACK for the plurality of downlink transfer blocks by using ACK/NACK resources indicated by the plurality of ACK/NACK resource indices. | 11-29-2012 |
20120314640 | APPARATUS AND METHOD FOR TRANSMITTING POWER HEADROOM INFORMATION IN A MULTI-CARRIER SYSTEM - A method of transmitting a power headroom (PH) by a user equipment (UE) in a multi-carrier system is provided. The method includes: receiving power determination information from a base station (BS); determining a plurality of maximum transmission power values for a plurality of serving cells by using the power determination information and a UE specific parameter; determining a plurality of PHs on the basis of the plurality of maximum power transmission values; and transmitting the plurality of maximum transmission power values and the plurality of PHs to the BS. Accordingly, since the maximum transmission power value and the power headroom information are provided to the BS, reliable carrier aggregation scheduling can be induced, thereby being able to improve uplink transmission capability. | 12-13-2012 |
20120320826 | METHOD AND APPARATUS FOR TRANSMITTING UPLINK CONTROL INFORMATION IN A WIRELESS COMMUNICATION SYSTEM - A method and an apparatus for transmitting uplink control information (UCI), performed by a user equipment, in a wireless communication system are provided. The method comprising: generating encoded information bits by performing channel coding on information bits of the UCI; generating a modulation symbol sequence by modulating the encoded information bits; generating a spread sequence by block-wise spreading on the modulation symbol sequences with an orthogonal sequence; and transmitting the spread sequence to a base station through an uplink control channel, wherein the information bits of the UCI comprises a first UCI bit sequence and a second UCI information bit. | 12-20-2012 |
20120320838 | CONTROL CHANNEL ALLOCATION METHOD, AND APPARATUS FOR SAME - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method for performing processes in which a terminal determines control channel allocation, as well as to an apparatus for the method. The method comprises the following steps: monitoring, on a first carrier, a first search space, containing a control channel candidate set, for control channels having no carrier indication information; and monitoring, on a second carrier, a second search space, containing a control channel candidate set, for control channels having carrier indication information. If the terminal is set to monitor a plurality of control channel candidates which have the same radio network temporary identifier (RNTI), the same information size, and the same first control channel element (CCE) in the first search space and in the second search space, the control channels are received only in the first search space on the first carrier. | 12-20-2012 |
20120327880 | METHOD AND APPARATUS FOR TRANSMITTING EXTENDED UPLINK ACKNOWLEDGEMENT INFORMATION IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system; and more specially, to a method and apparatus for transmitting extended uplink acknowledgement information in a wireless communication system. A method for receiving uplink acknowledgement information from a base station according to one embodiment of the present invention comprises the steps of: allocating a plurality of uplink acknowledgement transmission resources to each of at least one terminal; and receiving, by one uplink sub-frame, uplink acknowledgement information from the at least one terminal through at least one of the plurality of uplink acknowledgement transmission resources, wherein each of the plurality of uplink acknowledgement transmission resources is allocated, differently from each other, with at least one of the following: resource block (RB), a first cyclic shift (CS), a second CS, a first orthogonal spreading code (OC) and a second OC. | 12-27-2012 |
20120327883 | METHOD AND DEVICE FOR SIGNALING CONTROL INFORMATION IN CARRIER AGGREGATION SYSTEM - The present invention relates to a wireless communication system. More specially, the present invention relates to a method and a device which enable a terminal to transmit channel quality information, the method comprising the following steps: receiving a control channel, which includes a request for the channel quality information; generating the channel quality information on one or more specific downlink carriers from a plurality of downlink carriers after receiving the control channel; and transmitting the channel quality information through a shared channel, wherein the one or more specific downlink carriers are indicated using the caption of the request for the channel quality information or time information related to the transmission of the channel quality information. | 12-27-2012 |
20120327917 | METHOD AND DEVICE FOR ALLOCATING CONTROL CHANNEL - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and a device which enable a terminal to receive a control channel in a wireless communication system that uses multi-carriers, the method comprising the following steps: receiving a plurality of search space through a sub-frame, wherein each of the search spaces includes a plurality of control channel candidate sets and each of the search spaces corresponds to each of the carriers; and monitoring the control channel candidates for control channels, wherein the plurality of search spaces are connected in the resource region for the control channels according to an allocation pattern and with the starting point as the basis, and the allocation pattern changes according to time. | 12-27-2012 |
20130010743 | METHOD AND USER EQUIPMENT FOR TRANSMITTING UPLINK CONTROL INFORMATION - In the event ACK/NACK information on downlink data transmitted on one or more carriers must be transmitted on a PUCCH together with SR, user equipment of the present invention always modulates the ACK/NACK information to a first complex modulation symbol regardless of the number of the carriers when a specific carrier is ACK and the other carriers are NACKs, or the specific carrier is ACK and ACK/NACK bundled for other carriers is NACK. Also, the user equipment always modulates the ACK/NACK information to a second complex modulation symbol regardless of the number of the carriers when a specific carrier is NACK and the other carriers are NACKs, or the specific carrier is ACK and the ACK/NACK bundled for the other carriers is NAC. According to the present invention, regardless of the number of carriers needed for the user equipment, at least ACK/NACK information on the specific carrier can be exactly transmitted to a base station. | 01-10-2013 |
20130016687 | METHOD AND DEVICE FOR TRANSMITTING CONTROL INFORMATION - The present invention relates to a wireless communication system. In particular, the present invention relates to a method and a device for transmitting ACK/NACK through PUSCH, and comprises the following steps: receiving one or more data; generating ACK/NACK information on the one or more data; and writing the ACK/NACK information on a matrix that corresponds to a PUSCH resource, wherein the ACK/NACK information is written on the matrix moving from the top side to the bottom side in accordance with a time-first method, in a first transmission mode, and wherein the ACK/NACK information is written on a subset of a column in the matrix moving from the bottom side to the top side of the matrix, in a second transmission mode. | 01-17-2013 |
20130034062 | UPLINK TRANSMISSION METHOD AND APPARATUS IN WIRELESS COMMUNICATION SYSTEM - The present invention provides an uplink transmission method and apparatus in a wireless communication system. A terminal receives an uplink resource allocation from a base station; and transmits uplink transmission blocks to a PUSCH (physical uplink shared channel) by using the uplink resource allocation. The uplink resource allocation indicates an allocated RBs (resource blocks) within a subframe that includes a plurality of RBs. The subframe is divided into at least one PUCCH (physical uplink control channel) area for PUCCHs and a plurality of PUSCH (physical uplink shared channel) area for PUSCHs, wherein the PUCCH area is arranged between the plurality of PUSCH regions. | 02-07-2013 |
20130039311 | COMMUNICATION METHOD USING A CARRIER AGGREGATION AND APPARATUS THEREFORE - The present invention is directed to a wireless communication system. More specifically, the present invention is directed to a method and an apparatus of controlling uplink transmission at a user equipment in a wireless communication system, wherein the user equipment is connected to multiple component carriers, which includes receiving configuration information for transmitting an uplink signal from a base station; and identifying a time for transmitting the uplink signal to the base station on a corresponding uplink component carrier in use of the configuration information, wherein if the corresponding uplink component carrier is in a non-available state at the time for transmitting the uplink signal, the uplink signal is not transmitted. | 02-14-2013 |
20130039321 | METHOD AND APPARATUS FOR TRANSMITTING UPLINK CONTROL INFORMATION IN A CARRIER AGGREGATION SYSTEM - The present invention provides a method and apparatus for transmitting UCI (uplink control information) by user equipment in a carrier aggregation system. According to the method, the user equipment transmits UCI through a PUSCH (physical uplink shared channel) of a primary cell in a subframe that has PUSCH transmission of the primary cell; and if the subframe that does not have the PUSCH transmission of the primary cell has PUSCH transmission of at least one secondary cell, the user equipment transmits the UCI through the PUSCH of one of the at least one secondary cell. In this case, more than one serving cell is set up in the user equipment; simultaneous transmission of PUSCH and PUCCH (physical uplink control channel), with PUSCH being a data channel and PUCCH being a control channel, is not set up in the serving cells; and each of the serving cells includes the primary cell and the at least one secondary cell. | 02-14-2013 |
20130051259 | METHOD AND APPARATUS FOR CONTROLLING UPLINK POWER IN A WIRELESS ACCESS SYSTEM - According to one embodiment of the present invention, a method for reporting power headroom in a user equipment of a multi-carrier system, includes receiving a physical downlink control channel (PDCCH) signal comprising uplink resource allocation information from a base station; transmitting at least one of a physical uplink shared channel (PUSCH) signal and a physical uplink control channel (PUCCH) signal to the base station in a predetermined subframe based on the uplink resource allocation information in accordance with a transmission mode; calculating one or more power headroom values for the predetermined subframe in accordance with the transmission mode; and transmitting a report message comprising the one or more power headroom values to the base station, wherein the user equipment reports its first and second type power headroom values when operating in transmission mode A, or reports its first type power headroom value when operating in transmission mode B. | 02-28-2013 |
20130051339 | COMMUNICATION METHOD USING A CARRIER AGGREGATION AND APPARATUS THEREFORE - The present invention is directed to a wireless communication system. More specifically, the present invention is directed to a method and an apparatus of controlling uplink transmission at a user equipment in a wireless communication system, wherein the user equipment is connected to multiple component carriers, which includes receiving configuration information for transmitting an uplink signal from a base station; and identifying a time for transmitting the uplink signal to the base station on a corresponding uplink component carrier in use of the configuration information, wherein if the corresponding uplink component carrier is in a non-available state at the time for transmitting the uplink signal, the uplink signal is not transmitted. | 02-28-2013 |
20130058291 | METHOD AND APPARATUS FOR PERFORMING CROSS-CARRIER SCHEDULING FOR SPS - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and apparatus in which a base station transmits a signal to a relay in a wireless communication system. A method in which a terminal receives a downlink signal in a wireless communication system that supports carrier aggregation comprises: a step of receiving, on a first carrier, a physical downlink control channel (PDCCH) having no carrier indication information; and a step of receiving a physical downlink shared channel (PDSCH) using the scheduling information carried on the PDCCH, wherein the PDSCH is received on the first carrier in the event the PDCCH is a non-semi-persistent scheduling (SPS) PDCCH, and the PDSCH is received on a second carrier different from the first carrier in the event the PDCCH is an SPS PDCCH. | 03-07-2013 |
20130058302 | METHOD AND APPARATUS FOR TRANSMITTING A REFERENCE SIGNAL IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method and apparatus for transmitting a reference signal in a wireless communication system. A terminal generates a base sequence having a length of 12, for a reference signal, and determines a cyclic shift index from among a set of a cyclic shift indices {0, 3, 6, 8, 10}. The terminal cyclically shifts the base sequence on the basis of the determined cyclic shift index to generate a cyclically shifted sequence, and transmits the cyclically shifted sequence to a base station. | 03-07-2013 |
20130083709 | METHOD AND DEVICE FOR TRANSMITTING ACKNOWLEDGEMENT IN WIRELESS COMMUNICATION SYSTEM - Disclosed are a method and a device for transmitting an acknowledgement. A terminal receives at least one downlink transport block from at least one serving cell. The terminal selects one of an explicit resource and an implicit resource, and transmits an acknowledgement for at least one said downlink transport block by using the selected resource. | 04-04-2013 |
20130094392 | METHOD AND APPARATUS FOR TRANSMITTING CHANNEL STATE INFORMATION - The present invention relates to a method for transmitting channel state information of a terminal in a multi-carrier system, and to a terminal using the method. The method comprises the steps of: receiving reference signals from a base station via a plurality of downlink component carriers; measuring a channel state for each of the plurality of downlink component carriers using the reference signals included in the plurality of downlink component carriers; generating channel state information on a portion of the plurality of downlink component carriers; and transmitting to the base station the channel state information on a portion of the plurality of downlink component carriers and/or an index which indicates the portion of the plurality of downlink component carriers. | 04-18-2013 |
20130094466 | UPLINK CONTROL CHANNEL TRANSMISSION CONTROL METHOD IN A MULTI-CARRIER SYSTEM AND TERMINAL USING SAME - Provided is a transmission power control method for an uplink control channel of a terminal in a multi-carrier system where a plurality of downlink component carriers and at least one uplink component carrier are set in the terminal. The method includes: receiving a plurality of downlink grants from a base station; checking a Transmission Power Command (TPC) field included in each of the plurality of downlink grants; determining a transmission power of an uplink control channel (PUCCH) with a value of the checked TPC field; and transmitting the uplink control channel at the determined transmission power, with one configured uplink component carrier among the at least one uplink component carrier. | 04-18-2013 |
20130100917 | METHOD AND DEVICE FOR TRANSMITTING UPLINK CONTROL INFORMATION IN A WIRELESS COMMUNICATION SYSTEM - Provided are a method and device for transmitting uplink control information in a wireless communication system. A terminal determines a feedback cell where uplink transmission blocks and uplink control information are multiplexed, from among a plurality of serving cells. The terminal multiplexes the uplink transmission blocks and the uplink control information on an uplink shared channel of the feedback cell, and the multiplexed uplink control information is transmitted on the uplink shared channel of the feedback cell. | 04-25-2013 |
20130100922 | METHOD AND APPARATUS FOR TRANSMITTING CHANNEL STATE INFORMATION - The present invention relates to a method in which a terminal transmits channel status information in a multi-carrier system, and to a terminal which uses the method. The method comprises the following steps: receiving a reference signal from a base station; transmitting first channel information to the base station; and transmitting second channel information to the base station, wherein the first channel information includes information for indicating one or more precoding matrices estimated using the reference signal, and the second channel information includes any one precoding matrix from among one or more precoding matrices indicated by the first channel information. | 04-25-2013 |
20130114461 | APPARATUS AND METHOD FOR TRANSMITTING UPLINK CONTROL INFORMATION IN A MULTIPLE CARRIER SYSTEM - Provided are an apparatus and method for transmitting uplink control information (UCI) in a multiple carrier system. The method comprises the steps of: generating uplink control information for measuring a downlink component carrier (DL CC) set in a terminal; selecting a physical uplink shared channel (PUSCH) of one uplink component carrier from among PUSCHs of at least two uplink component carriers set in the terminal, according to a priority order; and transmitting the uplink control information through the PUSCH of the selected uplink component carrier. | 05-09-2013 |
20130114479 | METHOD AND APPARATUS FOR TRANSMITTING RECEPTION CONFIRMATION RESPONSE OF USER EQUIPMENT IN WIRELESS COMMUNICATION SYSTEM - Provided is a method for transmitting a HARQ (hybrid automatic repeat request) ACK (acknowledgment)/NACK (not-acknowledgement) response from user equipment in which two serving cells are set. The method comprises the steps of: receiving a first transport block through a first serving cell which is set in a first transmission mode, in which up to two transport blocks are supported; determining an HARQ ACK/NACK response which includes a first response to the first transport block; and transmitting the HARQ ACK/NACK response, wherein the first response is the same as a response used when two transport blocks have been received through the first serving cell. | 05-09-2013 |
20130114554 | METHOD FOR TRANSMITTING CONTROL INFORMATION AND APPARATUS FOR SAME - The present invention pertains to a wireless communication system. Specifically, the present invention relates to a method by which a terminal transmits control information and to an apparatus for the same, and relates to a method comprising the steps of: receiving CSI configuration information for a plurality of cells, in which the CSI configuration information is used to make a periodic CSI report of each cell; receiving information requesting a non-periodic CSI report of a specific cell; and transmitting one or more CSI reports in a corresponding subframe, wherein: when a periodic CSI report and a non-periodic CSI report of an equal cell collide with each other in the corresponding subframe, the periodic CSI report is dropped; and when one or more periodic CSI reports and a non-periodic CSI report of mutually different cells collide with each other in the corresponding subframe, at least a part of one or more periodic CSI reports is transmitted through a channel for the non-periodic CSI report. | 05-09-2013 |
20130114556 | METHOD AND DEVICE FOR TRANSMITTING CONTROL INFORMATION - The present invention relates to a wireless communication system. More specifically, the present invention relates to a method and a device for transmitting uplink control information where a plurality of cells are configured, and comprises: a step for receiving one or more PDCCH; a step for generating reception response information corresponding to the one or more PDCCH; and a step for transmitting through PUCCH the reception response information in a subframe, wherein the reception response information is transmitted using a PUCCH resource provided in advance by an upper layer signaling when only one PCell PDCCH is detected and the predetermined conditions are met, and is transmitted using a PUCCH resource linked to an index of a resource that makes up the PCell PDCCH when only one PCell PDCCH is detected and the predetermined conditions are not met. | 05-09-2013 |
20130148592 | DATA TRANSMISSION METHOD AND DEVICE IN WIRELESS COMMUNICATION SYSTEM - A data transmission method and device are provided in a wireless communication system. A user equipment transmits uplink control information (UCI) using a physical uplink control channel (PUCCH) resource, allocated to a first component carrier (CC) among a plurality of CC's, in a sounding reference signal (SRS) subframe. The plurality of CC's in said SRS subframe, includes a second CC which comprises a single carrier-frequency division multiple access (SRS SC-FDMA) symbol, which is reserved to transmit SRS. | 06-13-2013 |
20130170462 | METHOD AND DEVICE OF TRANSMITTING A PLURALITY OF RECEPTION CONFIRMATION INFORMATION - A method and apparatus for transmitting ACK/NACK of a user equipment are provided. The method includes: receiving a first PDCCH and a second PDCCH through at least one serving cell; receiving a first PDSCH scheduled by the first PDCCH; receiving a second PDSCH scheduled by the second PDCCH; allocating a first PUCCH resource on the basis of a lowest index of a CCE on which the first PDCCH is transmitted; allocating a second PUCCH resource on the basis of a lowest index of a CCE on which the second PDCCH is transmitted; and transmitting ACK/NACK for the first PDSCH and the second PDSCH through a serving cell linked to a serving cell receiving the first PDCCH and the second PDCCH, wherein a transmission resource for transmitting the ACK/NACK is selected from the first PUCCH resource and the second PUCCH resource. | 07-04-2013 |
20130176920 | METHOD AND APPARATUS FOR TRANSMITTING A PLURALITY OF PIECES OF RECEIPT ACKNOWLEDGEMENT INFORMATION IN A WIRELESS COMMUNICATION SYSTEM - Provided is a method and apparatus for transmitting acknowledgement/not-acknowledgement (ACK/NACK) of a user equipment to which a plurality of cells are assigned in a wireless communication system operating with time division duplex (TDD). The method includes: receiving a plurality of codewords via the plurality of serving cells; generating ACK/NACK information indicating reception acknowledgement for each codeword; bundling the generated ACK/NACK information; and transmitting the bundled ACK/NACK information, wherein the bundling is sequentially performed on a part or entirety of the generated ACK/NACK information until an amount of the ACK/NACK information is less than or equal to a predetermined transmission amount. | 07-11-2013 |
20130188535 | METHOD AND APPARATUS FOR TRANSMITTING RECEPTION CONFIRMATION IN WIRELESS SYSTEM - Provided are a method and an apparatus for transmitting a reception confirmation in a wireless system. A terminal determines at least one downlink sub-frame for ACK/NACK feedback from each of a plurality of serving cells and determines the number of ACK/NACK bits for the plurality of serving cells. The terminal generates bundled ACK/NACK bits by arraying the ACK/NACK bits in the ascending order of the cell index of the plurality of serving cells, and transmits the bundled ACK/NACK bits. | 07-25-2013 |
20130208710 | METHOD AND APPARATUS FOR TRANSMITTING A SOUNDING REFERENCE SIGNAL - Provided are a method and apparatus for transmitting a sounding reference signal. A terminal receives, from a base station, a configuration for periodic channel quality indicator (CQI) transmission and a configuration for sound reference signal (SRS) transmission. When a positive SRS request is detected, the terminal determines an SRS subframe winch satisfies the configuration for SRS transmission. When the periodically transmitted CQI is triggered in the SRS subframe, the terminal transmits the SRS in the SRS subframe to the base station. | 08-15-2013 |
20130215875 | METHOD AND APPARATUS FOR MONITORING SCHEDULING INFORMATION - Provided are a method and apparatus for monitoring scheduling information in a wireless communication system. A terminal monitors a first physical downlink control channel (PDCCH) having first scheduling information, and monitors a second PDCCH having second scheduling information based on the first scheduling information. The second scheduling information includes resource allocation for a plurality of serving cells. | 08-22-2013 |
20130223298 | COMMUNICATION METHOD AND DEVICE IN A WIRELESS COMMUNICATION SYSTEM - According to the invention, a wireless device communicates with a base station by applying a first downlink-uplink (DL-UL) setting that sets a plurality of downlink subframes and a plurality of uplink subframes at different times. The wireless device communicates with the base station by using at least one auxiliary subframe when receiving a second UL-DL setting from the base station. | 08-29-2013 |
20130223299 | METHOD AND DEVICE FOR TRANSMITTING ACK/NACK IN TDD-BASED WIRELESS COMMUNICATION SYSTEM - Disclosed are a method and a device for transmitting an ACK/NACK in a time division duplex (TDD)-based wireless communication system. A terminal receives an uplink grant that includes uplink resource allocation and piggyback information, and determines an ACK/NACK response for at least one downlink transmission block according to said piggyback information. The terminal multiplexes the ACK/NACK response with an uplink transport block and transmits the multiplexed ACK/NACK response. | 08-29-2013 |
20130223300 | METHOD AND DEVICE FOR ACK/NACK TRANSMISSION IN TDD-BASED WIRELESS COMMUNICATION SYSTEM - Provided are a method and a device for ACK/NACK transmission in a TDD (Time Division Duplex)-based wireless communication system. The terminal receives a SPS downlink transmission block on a physical downlink shared channel (PDSCH) without a physical downlink control channel (PDCCH), and receives a downlink transmission block on the PDSCH that is indicated by the PDCCH having a downlink assignment index (DAI). The terminal transmits a 2-bit ACK/NACK regarding the SPS downlink transmission block and the downlink transmission block on an uplink control channel. | 08-29-2013 |
20130223392 | METHOD AND APPARATUS FOR ADJUSTING SOUND REFERENCE SIGNAL TRANSMISSION POWER - Provided are a method and apparatus for adjusting sounding reference signal transmission power. A terminal a plurality of transmit powers used for transmitting a plurality of sounding reference signals (SRSs) in a sounding reference symbol. If a total transmission power for the plurality of SRSs exceeds a maximum transmission power, the terminal scales each transmission power by the same scale factor. | 08-29-2013 |
20130242822 | METHOD AND APPARATUS FOR TRANSMITTING ACK/NACK IN A TDD-BASED WIRELESS COMMUNICATION SYSTEM - Provided are a method and an apparatus for transmitting ACK/NACK in a time division duplex (TDD)-based wireless communication system. A terminal receives zero or more downlink transmission blocks in M downlink subframes from a first serving cell, and determines an ACK/NACK state {HARQ-ACK(1), HARQ-ACK(2), HARQ-ACK(3), HARQ-ACK(4)} for the first serving cell. The terminal determines an ACK/NACK response based on said ACK/NACK state, and transmits the ACK/NACK response in an uplink subframe. | 09-19-2013 |
20130250822 | METHOD AND DEVICE FOR TRANSMITTING/RECEIVING SIGNAL IN TDD-BASED WIRELESS COMMUNICATION SYSTEM - Provided are a method and apparatus for transmitting and receiving a signal of a user equipment in a time division duplex (TDD)-based carrier aggregation system. The method includes: receiving a downlink grant for at least one subframe of a secondary cell via a subframe of a primary cell; and receiving downlink data in the at least one subframe of the secondary cell on the basis of the downlink grant, wherein the primary cell and the secondary cell are set to different downlink (DL)-uplink (UL) configurations among DL-UL configurations indicating how a downlink subframe and an uplink subframe are configured in a radio frame, and wherein the downlink grant includes a downlink subframe index (DSI) indicating the at least one subframe of the secondary cell. | 09-26-2013 |
20130250889 | METHOD AND APPARATUS FOR CONTROLLING UPLINK POWER IN A WIRELESS ACCESS SYSTEM - According to one embodiment of the present invention, a method for reporting power headroom in a user equipment of a multi-carrier system, includes receiving a physical downlink control channel (PDCCH) signal comprising uplink resource allocation information from a base station; transmitting at least one of a physical uplink shared channel (PUSCH) signal and a physical uplink control channel (PUCCH) signal to the base station in a predetermined subframe based on the uplink resource allocation information in accordance with a transmission mode; calculating one or more power headroom values for the predetermined subframe in accordance with the transmission mode; and transmitting a report message comprising the one or more power headroom values to the base station, wherein the user equipment reports its first and second type power headroom values when operating in transmission mode A, or reports its first type power headroom value when operating in transmission mode B. | 09-26-2013 |
20130250890 | METHOD AND APPARATUS FOR CONTROLLING UPLINK POWER IN A WIRELESS ACCESS SYSTEM - According to one embodiment of the present invention, a method for reporting power headroom in a user equipment of a multi-carrier system, includes receiving a physical downlink control channel (PDCCH) signal comprising uplink resource allocation information from a base station; transmitting at least one of a physical uplink shared channel (PUSCH) signal and a physical uplink control channel (PUCCH) signal to the base station in a predetermined subframe based on the uplink resource allocation information in accordance with a transmission mode; calculating one or more power headroom values for the predetermined subframe in accordance with the transmission mode; and transmitting a report message comprising the one or more power headroom values to the base station, wherein the user equipment reports its first and second type power headroom values when operating in transmission mode A, or reports its first type power headroom value when operating in transmission mode B. | 09-26-2013 |
20130250903 | METHOD AND APPARATUS FOR TRANSMITTING CHANNEL STATUS INFORMATION IN CARRIER AGGREGATION SYSTEM - Provided is a channel status information (CSI) transmission method performed by a user equipment in a carrier aggregation system. The method includes: allocating a plurality of serving cells; configuring a subframe predetermined to transmit CSI for a single serving cell among the allocated plurality of serving cells; and if uplink data transmission via a physical uplink shared channel (PUSCH) region exists in the configured subframe and if the single serving cell is deactivated, transmitting deactivation confirmation information for indicating that the single serving cell is deactivated via the PUSCH region together with the uplink data. | 09-26-2013 |
20130258914 | METHOD AND APPARATUS FOR TRANSMITTING ACK/NACK IN TDD-BASED WIRELESS COMMUNICATION SYSTEM - Provided are a method and apparatus for transmitting positive-acknowledgement (ACK)/negative-acknowledgement (NACK) in a time division duplex (TDD)-based wireless communication system. A user equipment receives an uplink grant which includes an uplink resource assignment and an uplink downlink assignment index (DAI), determines an ACK/NACK payload size on the basis of a value of the uplink DAI, and generates an ACK/NACK response for the at least one downlink transport block. The user equipment multiplexes the ACK/NACK response on an uplink transport block, and transmits the multiplexed ACK/NACK response. | 10-03-2013 |
20130258980 | METHOD AND APPARATUS FOR CONTROLLING UPLINK POWER IN A WIRELESS ACCESS SYSTEM - According to one embodiment of the present invention, a method for reporting power headroom in a user equipment of a multi-carrier system, includes receiving a physical downlink control channel (PDCCH) signal comprising uplink resource allocation information from a base station; transmitting at least one of a physical uplink shared channel (PUSCH) signal and a physical uplink control channel (PUCCH) signal to the base station in a predetermined subframe based on the uplink resource allocation information in accordance with a transmission mode; calculating one or more power headroom values for the predetermined subframe in accordance with the transmission mode; and transmitting a report message comprising the one or more power headroom values to the base station, wherein the user equipment reports its first and second type power headroom values when operating in transmission mode A, or reports its first type power headroom value when operating in transmission mode B. | 10-03-2013 |
20130258986 | METHOD AND APPARATUS FOR TRANSMITTING CHANNEL STATUS INFORMATION IN CARRIER AGGREGATION SYSTEM - Provided are a method and apparatus for transmitting channel status information (CSI) of a user equipment (UE) in a carrier aggregation system. The method includes: receiving an uplink grant including a CSI request field from a base station (BS); and transmitting aperiodic CSI for a first serving cell, a first serving cell set or a second serving cell set according to a bit value of the CSI request field to the BS via the first serving cell. | 10-03-2013 |
20130265914 | METHOD AND APPARATUS FOR TRANSMITTING ACK/NACK IN A WIRELESS COMMUNICATION SYSTEM BASED ON TDD - Provided is a method of transmitting ACK/NACK in a TDD-based wireless communication system. The method includes: receiving M downlink subframes associated with an uplink subframe n in each of two serving cells; determining four candidate resources based on the M downlink subframes received in each of the two serving cells; and transmitting an ACK/NACK response for the M downlink subframes by using one resource selected from the four candidate resources in the uplink subframe n, wherein the two serving cells includes a first serving cell and a second serving cell, and wherein among the four candidate resources, a first resource and a second resource are associated with a PDSCH or a SPS release PDCCH for releasing semi-persistent scheduling received in the first serving cell, and a third resource and a fourth resources are associated with a PDSCH received in the second serving cell. | 10-10-2013 |
20130315113 | METHOD AND DEVICE FOR SCHEDULING IN CARRIER AGGREGATION SYSTEM - Provided are a method and apparatus for scheduling in a carrier aggregation system. The method includes: transmitting information for indicating a plurality of secondary cells to be scheduled through a joint coded control channel by using a higher layer signal; transmitting a separate coded control channel for scheduling a primary cell; and transmitting one joint coded control channel for scheduling the plurality of secondary cells, wherein the separate coded control channel is a control channel for scheduling one data channel transmitted through the primary cell, and the joint coded control channel is a control channel for scheduling the plurality of data channels transmitted through the plurality of secondary cells. | 11-28-2013 |
20130315114 | METHOD AND DEVICE FOR SCHEDULING IN CARRIER AGGREGATE SYSTEM - According to one embodiment, a scheduling method of a base station (BS) in a carrier aggregation system includes: transmitting uplink-downlink (UL-DL) configuration information on a time division duplex (TDD) frame used in a second serving cell through a first serving cell; and communicating with a user equipment (UE) through a subframe of the second serving cell configured by the UL-DL configuration information, wherein the first serving cell and the second serving cell are serving cells allocated to the UE. | 11-28-2013 |
20130322343 | METHOD AND DEVICE FOR TRANSMITTING RECEPTION CONFIRMATION IN WIRELESS COMMUNICATION SYSTEM - According to one embodiment, a method for transmitting acknowledgement/not-acknowledgement (ACK/NACK) of a user equipment in a wireless communication system. Includes: receiving uplink-downlink (UL-DL) configuration 5 information on a plurality of subframes; receiving data in at least one subframe among the plurality of subframes; configuring ACK/NACK for the received data; and transmitting the ACK/NACK through a UL subframe. | 12-05-2013 |
20130322355 | METHOD AND APPARATUS FOR TRANSMITTING UPLINK CONTROL INFORMATION IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method for a terminal, in which a plurality of serving cells is established, to transmit uplink control information in a wireless communication system. The method comprises the following steps: receiving at least one physical downlink control channel (PDCCH) in a first subframe via a first serving cell from among the plurality of serving cells in a first subframe; receiving at least one physical downlink shared channel (PDSCH) via at least one serving cell from among the plurality of serving cells in the first subframe based on said at least on PDCCH; and transmitting, in a second subframe, an acknowledgement/non-acknowledgement (ACK/NACK) which indicates whether or not a decoding for said at least one PDSCH has succeeded. The ACK/NACK is transmitted using a first resource through only the first serving cell, and transmitted using a second resource in the second subframe if said at least one PDSCH is received through two or more serving cells from among the plurality of serving cells. The first resource is dynamically allocated through the PDCCH which schedules the first serving cell, and the second resource is designated in advance. | 12-05-2013 |
20130322391 | METHOD AND APPARATUS FOR TRANSMITTING UPLINK CONTROL INFORMATION IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method and apparatus for transmitting uplink control information (UCI) in a carrier aggregation system wherein a plurality of serving cells is aggregated. The method comprises the steps of: receiving a downlink signal through at least one of the serving cells; generating first UCI and second UCI responding to the downlink signal; transmitting the first UCI through a first serving cell; and transmitting the second UCI through a second serving cell. The first serving cell and the second serving cell are different from each other, and the first UCI and the second UCI are different kinds of uplink control information than each other. | 12-05-2013 |
20130343238 | METHOD AND APPARATUS FOR TRANSMITTING MULTIPLE RECEPTION CONFIRMATIONS IN TIME DIVISION DUPLEX SYSTEM - Provided is a method for transmitting ACK/NACK (acknowledgement/not-acknowledgement) of a terminal having a plurality of configured serving cells in a wireless communication system, which operates by means of TDD (time division duplex). The method comprises the following steps: setting the plurality of serving cells; receiving a codeword from at least one serving cell from the set plurality of service cells; and transmitting reception acknowledgement information which expresses reception confirmation of the code word, wherein when the terminal receives the code word through a first serving cell only from the set plurality of serving cells, the reception acknowledgement information is transmitted according to a first transmission method, wherein the first transmission method is a method for transmitting the ACK/NACK when the terminal is set with only one serving cell. | 12-26-2013 |
20140016600 | METHOD AND APPARATUS FOR TRANSMITTING UPLINK CONTROL INFORMATION IN A WIRELESS COMMUNICATION SYSTEM - A method and an apparatus for transmitting uplink control information (UCI), performed by a user equipment, in a wireless communication system are provided. The method comprising: generating encoded information bits by performing channel coding on information bits of the UCI; generating a modulation symbol sequence by modulating the encoded information bits; generating a spread sequence by block-wise spreading on the modulation symbol sequences with an orthogonal sequence; and transmitting the spread sequence to a base station through an uplink control channel, wherein the information bits of the UCI comprises a first UCI bit sequence and a second UCI information bit. | 01-16-2014 |
20140029554 | METHOD AND APPARATUS FOR CONTROLLING TRANSMIT POWER IN WIRELESS COMMUNICATION SYSTEM - A method and apparatus of controlling transmit power in a wireless communication system is provided. A wireless apparatus selects one transmit mode among a plurality of transmit modes, and determines the transmit power on the basis of the selected transmit mode. The wireless apparatus transmits an uplink channel by using the transmit power. | 01-30-2014 |
20140050205 | METHOD FOR CONTROLLING UPLINK TRANSMISSION POWER AND WIRELESS DEVICE USING SAME - Provided are a method for controlling uplink transmission power and a wireless device. The wireless device decides a first transmission power of a first uplink channel, which is transmitted through a first wireless resource from a first serving cell, and decides a second transmission power of a second uplink channel, which is transmitted through a second wireless resource from a second serving cell. The first serving cell belongs to a first timing advance (TA) group, and the second serving cell belongs to a second TA group that differs from the first TA group. All or a portion of the first wireless resource and the second wireless resource overlap, wherein the sum of the first and second transmission powers in the overlapping portion is decided so as not to exceed a maximum transmission power. | 02-20-2014 |
20140050206 | METHOD AND APPARATUS FOR TRANSMITTING SYNCHRONIZATION SIGNAL IN CARRIER AGGREGATION SYSTEM - Provided is a method and an apparatus for transmitting a synchronization signal in a carrier aggregation system. The method comprises: transmitting via a first serving cell a synchronization signal setting information with regard to a second serving cell; and transmitting the synchronization signal via the second serving cell, wherein the synchronization signal is variably set by means of the synchronization signal setting information. | 02-20-2014 |
20140056251 | METHOD AND APPARATUS FOR CONTROLLING UPLINK TRANSMISSION POWER - Provided are a method and apparatus for controlling uplink transmission power in a wireless communication system. A terminal transmits a random access preamble in a secondary cell, and receives a random access response in a primary cell. The terminal determines a transmission power for an uplink channel transmitted in the second cell based on the transmit power command (TPC) within the random access response. | 02-27-2014 |
20140056271 | METHOD FOR TRANSMITTING UPLINK AND WIRELESS DEVICE USING SAME - Provided are a method for transmitting an uplink and a wireless device. The wireless device decides a first wireless resource through which a sounding reference signal (SRS) will be transmitted from a first serving cell, and decides a second wireless resource through which an uplink channel will be transmitted from a second service cell. When all or a portion of the first wireless resource and the second wireless resource overlap, and a total transmission power with respect to the SRS and the uplink channel from the overlapping wireless resources exceeds a predetermined maximum transmission power, the wireless device drops the transmission of the SRS and transmits the uplink channel through the second wireless resource from the second service cell. | 02-27-2014 |
20140078941 | METHOD AND DEVICE FOR EXECUTING HARQ IN TDD-BASED WIRELESS COMMUNICATION SYSTEM - Provided are a method and a device for executing a hybrid automatic repeat request (HARQ) of a terminal in a time division duplex (TDD)-based wireless communication system. The method comprises the steps of: receiving an uplink grant for a first subframe of a second serving cell through a first serving cell; transmitting uplink data in the first subframe on the basis of the uplink grant; receiving an acknowledgement/not-acknowledgement (ACK/NACK) for the uplink data through the first serving cell; and, when the ACK/NACK signal is a NACK, transmitting a retransmission data for the uplink data in a second subframe of the second serving cell. | 03-20-2014 |
20140086116 | METHOD AND APPARATUS FOR TRANSMITTING/RECEIVING SIGNALS WITH A TERMINAL IN TDD WIRELESS COMMUNICATION SYSTEM - Provided are a method and apparatus for transmitting/receiving signals with a terminal in a time division duplex (TDD) system. The method comprises: a scheduling information and pattern information receiving step, wherein a second subframe is scheduled within a first subframe; and a step for transmitting/receiving signals with a base station from the second subframe, wherein the second subframe is used as a downlink subframe if scheduling information is a downlink grant which schedules a downlink data channel, the second subframe is used as an uplink subframe if scheduling information is an uplink grant which schedules an uplink data channel, and the pattern information is information indicating positions of time gaps to prevent interference in the second subframe. | 03-27-2014 |
20140086167 | METHOD AND APPARATUS FOR TRANSMITTING A SOUNDING REFERENCE SIGNAL BY A TERMINAL - Provided is a method for transmitting a sounding reference signal by a terminal, and a terminal using the method. The method comprises the following steps: receiving carrier information indicating the carrier via which a sounding reference signal is to be transmitted; receiving a physical downlink shared channel (PDSCH) through a first downlink component carrier; and transmitting a sounding reference signal through a second downlink component carrier, wherein the second downlink component carrier is determined based on the carrier information. | 03-27-2014 |
20140112217 | METHOD AND APPARATUS FOR COMMUNICATION IN TDD SYSTEM - Provided are a method and an apparatus for communication in a TDD (Time Division Duplex) system. A terminal is notified of a change in a first UL-DL setup from a base station during a first change period and receives a second UL-DL setup updated during a second change period. The terminal refreshes a buffer for an ongoing HARQ (Hybrid Automatic Repeat reQuest) process on the basis of the first UL-DL setup according to the reception of the second UL-DL setup. | 04-24-2014 |
20140112276 | METHOD AND APPARATUS FOR PERFORMING A RANDOM ACCESS PROCESS - Disclosed are a method and apparatus for performing a random access process in a wireless communication system. A terminal transmits a random access preamble in a first serving cell, and monitors a control channel for receiving a random access response for said random access preamble in a second serving cell. Proposed is a method is in which random access is performed when a plurality of serving cells are set up. | 04-24-2014 |
20140112286 | METHOD AND APPARATUS FOR PERFORMING RANDOM ACCESS - Provided is a method and an apparatus for performing a random access process in a wireless communication system. A wireless device transmits a random access preamble, based on a random access resource, to a base station, then receives a random access response to the random access preamble. The random-access resource can be set to the wireless device or to the group to which the wireless device belongs. | 04-24-2014 |
20140126409 | METHOD AND APPARATUS FOR REPORTING CHANNEL STATE - A method and an apparatus for reporting a channel state in a wireless communication system are provided. A wireless device monitors a physical downlink control channel (PDCCH) for downlink control information (DCI), which comprises a request for a channel quality indicator (CQI) for a plurality of wireless devices. When a CQI report is triggered by the request for the CQI, the wireless device reports the CQI to a base station. | 05-08-2014 |
20140126475 | METHOD AND APPARATUS FOR TRANSMITTING UPLINK - Provided are a method and a wireless device for transmitting an uplink. The wireless device transmits a random access preamble to a first serving cell through a first wireless resource, and transmits an uplink channel to a second serving cell through a second wireless resource. The first serving cell belongs to a first timing advance (TA) group, and the second serving cell belongs to a second TA group that differs from the first TA group. All or a portion of the first wireless resource and the second wireless resource overlap. | 05-08-2014 |
20140126529 | OPERATING METHOD IN MULTIPLE CELLS, AND WIRELESS DEVICE USING SAME - Provided is an operating method in multiple cells, and a wireless device using same. The wireless device monitors a control channel in each subframe of a normal cell. The wireless device receives information regarding the transmission power of a physical signal of an expanded cell having an unmonitored control channel, and receives the physical signal in the expanded cell. | 05-08-2014 |
20140133433 | COMMUNICATION METHOD AND WIRELESS DEVICE SUPPORTING VARIABLE BANDWIDTH - A wireless device transmits to a base station, which supports a basic bandwidth, a random preamble for indicating an operating bandwidth, and the wireless device receives a random access response from the base station as a response to the random access preamble. The operating bandwidth is smaller than the basic bandwidth. | 05-15-2014 |
20140133590 | CONTROL CHANNEL MONITORING METHOD AND DEVICE - The present invention relates to a method and device for monitoring a control channel in a wireless communication system. A terminal receives a UE-specific reference signal (URS) from at least one extended subframe, and monitors a control channel in an extended control channel region of the at least one extended subframe. The control channel is demodulated using the URS. | 05-15-2014 |
20140146769 | METHOD AND WIRELESS DEVICE FOR MONITORING CONTROL CHANNEL - Provided are a method of monitoring a control channel in a multiple antenna system, in which a plurality of layers are defined, and a wireless device using same. The wireless device monitors the control channel in a search layer that is selected from the plurality of layers. | 05-29-2014 |
20140153449 | METHOD AND DEVICE FOR TRANSMITTING ACK/NACK IN WIRELESS COMMUNICATION SYSTEM - Provided are a method and a device for transmitting an acknowledgement/not-acknowledgement (ACK/NACK) of a terminal which is set with a plurality of serving cells. The method comprises the steps of: receiving data in a subframe n of a second serving cell; and transmitting an ACK/NACK signal for the data in a subframe n+k | 06-05-2014 |
20140153506 | APPARATUS AND METHOD OF AVOIDING CONTROL CHANNEL BLOCKING - The present application is directed to a wireless communication system and, more particularly, a method of processing a control channel at a user equipment in a wireless communication system using multiple carriers. The method comprises receiving a plurality of search spaces, wherein each search space comprises a plurality of control channel candidates and each search space is corresponding to respective carrier. The method also includes monitoring the control channel candidates for the control channel. | 06-05-2014 |
20140153539 | METHOD AND DEVICE FOR SETTING A CONTROL CHANNEL AND A DATA CHANNEL IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method for configuring a starting position of a control channel in a wireless communication system, and a terminal using the same. The method includes receiving duration information about a physical downlink control channel from the first orthogonal frequency division multiplexing (OFDM) symbol of a downlink subframe; and configuring a first OFDM symbol after OFDM symbols indicated by the duration information, as a starting point of an enhanced-physical downlink control channel. The downlink subframe includes a plurality of subcarriers in a frequency domain and 12 or 14 OFDM symbols in a time domain. The PDCCH includes the first N (N is a natural number of from 1 to 4) number of OFDM symbols of the downlink subframe. The duration information indicates the N number of OFDM symbols. The E-PDCCH comprises the starting point to the last OFDM symbol of the downlink subframe. | 06-05-2014 |
20140161088 | METHOD AND APPARATUS FOR TRANSMITTING DATA IN A WIRELESS COMMUNICATION SYSTEM - Provided are a method and apparatus for transmitting data in a wireless communication system. The method comprises the steps of: setting up a frame including both a control domain for transmitting scheduling information to a first terminal and a data domain for transmitting first data to the first terminal; and transmitting, to a second terminal, second data in the control domain. The frame comprises a plurality of orthogonal frequency division multiplexing (OFDM) symbols in a time domain. The control domain consists of a first number N (where N is any natural number equal to or less than 4) of OFDM symbols in the frame. The data domain consists of OFDM symbols other than a number N of OFDM symbols in the frame. The second data has a predetermined bit size. | 06-12-2014 |
20140161089 | METHOD OF PERFORMING A RANDOM ACCESS PROCESS AND WIRELESS DEVICE USING SAME - Provided are a method of performing a random access process and wireless device using same in a wireless communication system. A first random access process and a second random access process are triggered in one subframe, and a wireless device selects one of the first random access process and the second random access process. The wireless device transmits a random access preamble on the selected random access process from the one subframe to a base station. | 06-12-2014 |
20140169313 | CONTROL CHANNEL ALLOCATION METHOD, AND APPARATUS FOR SAME - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method for performing processes in which a terminal determines control channel allocation, as well as to an apparatus for the method. The method comprises the following steps: monitoring, on a first carrier, a first search space, containing a control channel candidate set, for control channels having no carrier indication information; and monitoring, on a second carrier, a second search space, containing a control channel candidate set, for control channels having carrier indication information. If the terminal is set to monitor a plurality of control channel candidates which have the same radio network temporary identifier (RNTI), the same information size, and the same first control channel element (CCE) in the first search space and in the second search space, the control channels are received only in the first search space on the first carrier. | 06-19-2014 |
20140169324 | METHOD AND APPARATUS FOR DECODING DATA IN WIRELESS COMMUNICATION SYSTEM - Provided is a method and apparatus for decoding data by a user equipment (UE) in a wireless communication system. The method comprises the following steps: receiving group control information identified by a group identifier (ID) allocated to a plurality of UEs including the UE, wherein the group control information includes scheduling information indicating a group search space that is a wireless resource area through which data for the plurality of UEs can be transmitted; receiving data through the group search space; and decoding the data on the basis of a unique ID of the UE in the group search space. | 06-19-2014 |
20140185539 | METHOD AND APPARATUS FOR SCHEDULING IN A WIRELESS COMMUNICATION SYSTEM - Provided is a method and apparatus for scheduling in a wireless communication system. In the method, if frame configuration information is transmitted, the frame configuration information sets each sub-frame within a frame to either a default sub-frame or a variable sub-frame and transmits scheduling information which schedules the configured variable sub-frame; and if a signal based on the scheduling information from the configured variable sub-frame is transceived, the default sub-frame becomes a sub-frame for which the transmission direction is fixed, and the configured sub-frame is used as an uplink sub-frame or a downlink sub-frame according to the scheduling information. | 07-03-2014 |
20140198746 | METHOD AND DEVICE FOR PERFORMING A RANDOM ACCESS PROCESS - The preset invention relates to a method and device for performing a random access process in a wireless communication system. A terminal transmits a random access preamble in an activated secondary cell, and receives a random access response including uplink resource allocation in a primary cell. The terminal transmits a scheduled message by using the uplink resource allocation in the activated secondary cell. | 07-17-2014 |
20140206410 | APPARATUS AND METHOD FOR TRANSMITTING POWER HEADROOM INFORMATION IN A MULTI-CARRIER SYSTEM - A method of transmitting a power headroom by a user equipment (UE) in a multi-carrier system. The method includes: receiving power determination information from a base station (BS); determining a maximum transmission power value for each of a plurality of serving cells by using the power determination information and a UE specific parameter; determining a power heaadroom (PH) for the each of the plurality of serving cells on the basis of the maximum transmission power value for each of a plurality of serving cells; and transmitting control information to the BS, the control information comprising the maximum transmission power value and the PH for the each of the plurality of serving cells, wherein the control information includes information that indicates a specific cell for which the maximum transmission power value and the PH are provided among the plurality of serving cells. | 07-24-2014 |
20140219153 | METHOD AND APPARATUS FOR ADJUSTING SOUND REFERENCE SIGNAL TRANSMISSION POWER - A method of adjusting a transmit power for sounding reference signals in a wireless communication system supporting a plurality of cells, performed by a user equipment, including determining a first transmit power for a first sound reference signal (SRS) to be transmitted on a first serving cell and a second transmit power for a second SRS to be transmitted on a second serving cell, and if a total transmit power for the first SRS and the second SRS exceeds a maximum transmit power, scaling the first SRS and the second SRS with a same scaling factor. | 08-07-2014 |
20140219233 | COMMUNICATION METHOD FOR COOPERATIVE MULTI-POINT AND WIRELESS DEVICE USING SAME - Provided are a communication method for a cooperative multi-point and a wireless device using the same. The wireless device receives, from a first cooperative multi-point (CoMP) cell, a first physical downlink shared channel (PDSCH) in a first subframe of a first frequency band, and receives, from a second CoMP cell, a second PDSCH in a second subframe of a second frequency band. A portion or the entire first frequency band is overlapped with the second frequency band. A first start point at which the first PDSCH in said first subframe starts being scheduled is the same as a second start point at which the second PDSCH in said second subframe starts being scheduled. | 08-07-2014 |
20140233469 | METHOD AND APPARATUS FOR APPLYING CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM - Provided are a method and an apparatus for applying control information in a wireless communication system. The method includes the steps of: receiving a setting for ACK/NACK(acknowledgement/not-acknowledgement) repetition from a base station; receiving control information to be applied at a particular time point from the base station; transmitting ACK/NACK for the control information; and performing an operation according to the control information at the particular time point when the transmitted ACK/NACK is ACK, wherein the operation at the particular time point is applied to a subframe which is determined according to the setting for ACK/NACK repetition. | 08-21-2014 |
20140233517 | METHOD AND APPARATUS FOR TRANSMITTING UPLINK CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM - Provided are a method and an apparatus for transmitting uplink control information (UCI), which is carried out by a terminal in a wireless communication system. If the number of information bits of the UCI falls inside a specific range when different types of UCI are transmitted through the same PUCCH format, a bit sequence of each of the UCI are channel-coded by aligning/interleaving, wherein the aligning/interleaving is carried out so that the UCI having high importance are channel-coded so as to have better decoding performance. | 08-21-2014 |
20140254410 | Method and apparatus for transmitting reception acknowledgement in wireless communication system - Provided are a method and apparatus for transmitting acknowledgement/not-acknowledgement (ACK/NACK) of a user equipment in a carrier aggregation system. The method includes: assigning first and second control regions as search spaces for a specific cell; detecting scheduling information with respect to the specific cell from the first control region and/or second control region; receiving a data channel from the specific cell on the basis of the scheduling information; and transmitting ACK/NACK indicating a reception acknowledgement for the data channel, wherein if the scheduling information is detected from the first control region, the ACK/NACK is transmitted using a radio resource linked to another radio resource used to receive the scheduling information, and wherein if the scheduling information is detected from the second control region, the ACK/NACK is transmitted using a pre-set radio resource through a higher layer signal. | 09-11-2014 |
20140301359 | METHOD FOR SETTING STARTING POSITION OF DATA CHANNEL IN WIRELESS COMMUNICATION SYSTEM AND DEVICE USING METHOD - Provided are a method for setting a starting position in a time domain of a data channel in a wireless communication system and a device using the method therof. The method comprises the steps of: receiving position information notifying the position at which data channels start in a plurality of subframes; receiving a control channel in a first downlink subframe; and receiving at least one data channel scheduled by the control channel in the plurality of the downlink subframes, wherein the position at which the data channel starts in the plurality of the downlink subframes is determined on the basis of the position information. | 10-09-2014 |
20140314048 | CONNECTION ESTABLISHMENT METHOD AND APPARATUS FOR MTC UE - A connection establishment method for a Machine Type Communication (MTC) User Equipment (UE) in a wireless communication system is provided. A MTC UE receives system information from at least one neighbor Base Station (BS). The system information includes information regarding whether or not the at least one BS supports MTC UE. The MTC UE determines at least one candidate BS based on the system information. The at least one candidate BS supports the MTC UE. The MTC UE determines a last BS based on an intensity of a signal from the at least one candidate BS. The MTC UE sends a random access preamble to the last BS. | 10-23-2014 |
20140321400 | METHOD FOR CONTROLLING TRANSMISSION POWER, AND APPARATUS FOR SAME - A method and communication apparatus for transmitting signals in a wireless communication system supporting a plurality of component carriers are described. A physical uplink control channel (PUCCH), a physical uplink shared channel (PUSCH) with uplink control information (UCI) and a PUSCH without the UCI are simultaneously transmitted using the plurality of component carriers. If a total transmission power of the PUCCH, the PUSCH with the UCI and the PUSCH without the UCI exceeds a value corresponding to a maximum transmission power, a transmission power determined for the PUSCH without the UCI is reduced while maintaining transmission powers determined for the PUCCH and the PUSCH with the UCI. The PUCCH and the PUSCH with the UCI are transmitted based on the maintained determined transmission powers, and the PUSCH without the UCI is transmitted based on the reduced transmission power. | 10-30-2014 |
20140321424 | METHOD FOR RECEIVING DOWNLINK DATA AND WIRELESS DEVICE USING SAME - The present invention relates to a method for receiving downlink data and a wireless device using same. The wireless device determines a subframe reception timing difference between a first serving cell and a second serving cell, receives a downlink grant through a downlink control channel of the first serving cell, and receives a downlink transmission block through a downlink shared channel of the second serving cell as instructed by the downlink grant. When the subframe reception timing difference is a predetermined value, at least one orthogonal frequency division multiplexing (OFDM) symbol from among a plurality of OFDM symbols is neglected in a subframe where the downlink shared channel is received. | 10-30-2014 |
20140328229 | COMMUNICATION METHOD AND WIRELESS DEVICE IN TDD-BASED WIRELESS COMMUNICATION SYSTEM - Provided are a communication method and a wireless device in a time division duplex (TDD)-based wireless communication system. A wireless device receives a setting for a first special (S) subframe of a first cell to which a first timing advance (TA) is applied and a setting for a second S subframe of a second cell to which a second TA is applied. When a downlink (DL) reception and an uplink (UL) transmission are duplicated, the wireless device varies at least one of the settings among the first S subframe and second S subframe. | 11-06-2014 |
20140328293 | METHOD AND APPARATUS FOR TRANSMITTING RECEPTION ACKNOWLEDGEMENT INFORMATION IN WIRELESS COMMUNICATION SYSTEM - A method for configuring an acknowledgement for a hybrid automatic repeat request (HARQ) in a wireless communication system. The method includes receiving downlink data through one of a first downlink component carrier and a second downlink component carrier from a base station; and determining whether the first or second downlink component carrier is used for receiving the downlink data. If the first downlink component carrier is used for receiving the downlink data, the resource used for the PUCCH is determined by using a control channel element (CCE). If the second downlink component carrier is used for receiving the downlink data, the resource used for the PUCCH is determined by using a radio resource control (RRC) message. The resource used for the PUCCH is associated with an orthogonal sequence with which the ACK/NACK signal is spread. | 11-06-2014 |
20140348091 | METHOD AND APPARATUS FOR RECEIVING ACK/NACK IN WIRELESS COMMUNICATION SYSTEM - Provided are a method and an apparatus for a user equipment, which is allocated a plurality of serving cells, receiving acknowledgement/negative acknowledgement (ACK/NACK) in a wireless communication system. The method comprises: transmitting uplink data through a physical uplink shared channel (PUSCH); and receiving ACK/NACK with respect to the uplink through a physical hybrid-ARQ indicator channel (PHICH), wherein a serving cell that receives the ACK/NACK is selected from one or more serving cells, which the user equipment monitors to detect an uplink grant that schedules the PUSCH. | 11-27-2014 |
20140348108 | METHOD FOR CONTROLLING TRANSMISSION POWER, AND APPARATUS FOR SAME - A method is described for transmitting signals at a communication apparatus in a wireless communication system supporting a plurality of component carriers. A physical uplink shared channel (PUSCH) with uplink control information (UCI) and a PUSCH without the UCI are simultaneously transmitted using the plurality of component carriers. A predefined transmission power determination scheme is used to determine the transmission power of the PUSCH with the UCI, and determine the transmission power of the PUSCH without the UCI. If a total transmission power of the PUSCH with the UCI and the PUSCH without the UCI exceeds a value corresponding to a maximum transmission power configured for the communication apparatus, the determined transmission power of the PUSCH without UCI is adjusted while maintaining the determined transmission power of the PUSCH with the UCI. | 11-27-2014 |
20140349703 | METHOD FOR CONTROLLING SIGNAL TRANSMISSION POWER AND DEVICE FOR SAME - A method of transmitting signals including determining, per each of the component carriers, transmission power of at least one channel for simultaneous transmission, in such a way that a total transmission power of the at least one channel does not exceed a maximum transmission power configured for a corresponding component carrier; and checking whether a total transmission power of channels over the multiple component carriers for the simultaneous transmission exceeds a total maximum transmission power configured for the communication apparatus or not. If the total transmission power of the channels exceeds the total maximum transmission power configured for the communication apparatus, transmission power of at least one PUSCH among the channels is adjusted in such a way that an adjusted total transmission power over the multiple component carriers does not exceed the total maximum transmission power. | 11-27-2014 |
20140369294 | METHOD AND APPARATUS FOR TRANSMITTING UPLINK CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM - Provided are a method for a terminal transmitting uplink control information (UCI) through a physical uplink control channel (PUCCH) in a wireless communication system, and a terminal using the method. A transmission power to be applied to the uplink control channel is determined on the basis of a value subordinate to a PUCCH format, and at least one type of UCI is transmitted from the physical uplink control channel by using the transmission power that is determined, wherein when the PUCCH format is PUCCH format 3, and the at least one type of UCI includes acknowledgement/negative-acknowledgement (ACK/NACK) and periodic channel state information (CSI), the value subordinate to the PUCCH format is determined on the basis of the number of bits of the ACK/NACK and the number of bits of the periodic CSI. | 12-18-2014 |
20140370931 | METHOD AND APPARATUS FOR DATA TRANSMISSION BASED ON MULTIPLE CELL COLLABORATION - A method and mobile station are described for reporting channel quality information for multi-cell cooperation. The mobile station receives a channel quality request message for requesting channel quality information from a base station. The channel quality request message indicates that the mobile station is one of a plurality of candidate mobile stations to perform multi-cell cooperation. The mobile station reports the channel quality information to the base station. The channel quality information includes first channel quality information for the base station and second channel quality information for a neighboring base station. | 12-18-2014 |
20140376424 | METHOD AND APPARATUS FOR TRANSMITTING UPLINK CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM - Provided are a method and an apparatus for transmitting uplink control information performed by a user equipment in a wireless communication system. The method comprises the steps of: receiving a first parameter for indicating whether to simultaneously transmit a first combination of an acknowledgement/negative-acknowledgement (ACK/NACK) and a channel quality indicator (CQI), and a second parameter for indicating whether to multiplex a second combination of an ACK/NACK and the CQI and transmitting same as a second physical uplink control channel (PUCCH) format; and multiplexing the first combination of the ACK/NACK or the second combination of ACK/NACK with the CQI and transmitting same as a first PUCCH format or the second PUCCH format, based on the first parameter and the second parameter. | 12-25-2014 |
20150029964 | METHOD AND APPARATUS FOR TRANSMITTING CHANNEL STATE INFORMATION IN WIRELESS COMMUNICATION SYSTEM - Disclosed are a method and an apparatus for transmitting channel state information (CSI) of a user equipment, which is allocated a plurality of serving cells, in a wireless communication system. The method comprises: receiving setting information for setting groups comprising at least one serving cell from the plurality of serving cells, and transmitting periodic CSI with respect to a group that is selected according to priority between the groups, when the periodic CSI with respect to each of the groups is set to be transmitted from the same subframe, wherein the periodic CSI with respect to each of at least two serving cells are transmitted together when the at least two serving cells are included in the group that is selected. | 01-29-2015 |
20150031409 | METHOD FOR CONTROLLING UPLINK TRANSMISSION POWER AND WIRELESS DEVICE USING SAME - The present invention relates to a method for controlling uplink transmission power and to a wireless device using same in a wireless communication system. The wireless device receives determines uplink transmission power in consideration of the overlap period between subframes between a first serving cell belonging to a first timing advance (TA) group and a second serving cell belonging to the second TA group, and transmits an uplink channel on the basis of the uplink transmission power. | 01-29-2015 |
20150043524 | METHOD FOR TRANSMITTING AN UPLINK SIGNAL IN A WIRELESS COMMUNICATION SYSTEM, AND APPARATUS FOR SAME - A method of receiving a sounding reference signal (SRS). The method includes transmitting, to a user equipment, a radio resource control (RRC) message transmitting, to the user equipment, a medium access control (MAC) message, the MAC message including a bitmap for indicating at least one second CC to be activated and the at least one second CC being activated based on the bitmap; transmitting, to the user equipment, a physical downlink control channel (PDCCH) including a carrier indicator field (CIF) and an SRS field via the first CC, the CIF indicating a CC of the at least one second CC and the SRS field indicating whether the user equipment has to transmit the SRS via the CC indicated by the CIF; and receiving, from the user equipment, the SRS on an uplink subframe via the CC indicated by the CIF, when the SRS field is enabled. | 02-12-2015 |
20150049655 | METHOD AND DEVICE FOR ACK/NACK TRANSMISSION IN TDD-BASED WIRELESS COMMUNICATION SYSTEM - A method is described of reporting control information in a wireless communication system. A user equipment (UE) supporting at least one cell including a primary cell selects a physical uplink control channel (PUCCH) format among a plurality of PUCCH formats including a first PUCCH format and a second PUCCH format. The first PUCCH format is selected if the UE receives a first physical downlink shared channel (PDSCH) in one of M downlink time division duplex (TDD) subframes on the primary cell. The UE receives a second PDSCH with a downlink assignment index (DAI) in one of the M downlink TDD subframes on the primary cell. The UE does not receive a first physical downlink control channel (PDCCH) corresponding to the first PDSCH on the primary cell. The UE receives a second PDCCH corresponding to the second PDSCH, and transmits a positive-acknowledgement/negative-acknowledgement (ACK/NACK) signal by using the selected PUCCH format. | 02-19-2015 |
20150071222 | METHOD AND APPARATUS FOR TRANSMITTING UPLINK - A method, performed by a user equipment, is described for uplink transmission in a wireless communication system. A first time alignment (TA) to a first cell belonging to a first timing advance group (TAG) is performed. A second TA to a second cell belonging to a second TAG is performed. A determination is made as to whether to transmit or drop a sounding reference signal (SRS) on a subframe. The SRS is determined to be dropped based on whether the first and second TAGs are configured, whether at least one symbol of the subframe is used to transmit the SRS toward the second cell of the second TAG and also used to transmit a physical uplink shared channel (PUSCH) toward the first cell of the first TAG, and whether a total uplink transmission power exceeds a maximum value. | 03-12-2015 |
20150071232 | METHOD AND DEVICE FOR SIGNALING CONTROL INFORMATION IN CARRIER AGGREGATION SYSTEM - The present invention relates to a wireless communication system. More specially, the present invention relates to a method of maintaining uplink synchronization at a user equipment in a wireless communication system supporting carrier aggregation; configuring plural uplink component carriers, wherein each of the plural uplink component carriers has a respective uplink synchronization timing; receiving a downlink control information (DCI) through a physical downlink control channel of a specific downlink component carrier, wherein the DCI indicates an initiation of random access procedure and includes a carrier indicator field indicating one of the plurality of uplink component carriers; and transmitting a random access preamble through a uplink component carrier indicated by the carrier indicator field among the plural uplink component carriers. | 03-12-2015 |
20150078221 | METHOD AND APPARATUS FOR AGGREGATING CARRIERS IN WIRELESS COMMUNICATION SYSTEMS - The present invention relates to a method and apparatus for aggregating carriers in wireless communication systems. In the method, a first carrier is set up, and a second carrier is added in addition to the first carrier. In addition, the first carrier is a time division duplex (TDD) carrier for which an uplink subframe and a downlink subframe are positioned at different times in a frame, and the second carrier is a carrier only for a downlink that consists of downlink subframes. | 03-19-2015 |
20150092715 | METHOD AND APPARATUS FOR TRANSMITTING RECEPTION CONFIRMATION IN WIRELESS SYSTEM - Provided arc a method and an apparatus for transmitting a reception confirmation in a wireless system. A terminal determines at least one downlink sub-frame for ACK/NACK feedback from each of a plurality of serving cells and determines the number of ACK/NACK bits for the plurality of serving cells. The terminal generates bundled ACK/NACK bits by arraying the ACK/NACK bits in the ascending order of the cell index of the plurality of serving cells, and transmits the bundled ACK/NACK bits. | 04-02-2015 |
20150092723 | METHOD AND APPARATUS OF TRANSMITTING ACK/NACK - A method for transmitting an uplink signal by a user equipment (UE) in a wireless communication system. The method according to one embodiment includes receiving, by the UE, a physical downlink control channel (PDCCH) via one or more resource units; receiving, by the UE, a physical downlink shared channel (PDSCH) indicated by the received PDCCH; and transmitting, by the UE, a physical uplink control channel (PUCCH) using a PUCCH resource in response to the received PDSCH. An index of the PUCCH resource is determined by adding a first index offset and a second index offset to a lowest index of the one or more resource units. The first index offset is signaled via the PDCCH and the second index offset is signaled via higher layer signaling. | 04-02-2015 |
20150092730 | COMMUNICATION METHOD FOR ACTIVE AND NON-ACTIVE CARRIERS USING CARRIER AGGREGATION AND AN APPARATUS THEREFORE - A method for a base station to receive an uplink transmission from a user equipment. The method according to one embodiment includes transmitting, to the user equipment, Radio Resource Control (RRC) configuration information for channel status report, the RRC configuration information including information for periodically receiving channel status report from the user equipment; transmitting, to the user equipment, Layer 2 (L2) control information indicating states of the plurality of downlink component carriers, each of the plurality of downlink component carriers being indicated as one of an active state and a non-active state; and performing a procedure for periodically receiving channel status report for a corresponding downlink component carrier from the user equipment in use of the RRC configuration information. According to whether the corresponding downlink component carrier is in the active state or the non-active state at a time for receiving a channel status report, channel status information or no channel status information is received for the corresponding downlink component carrier from the user equipment at the time, respectively. | 04-02-2015 |
20150110016 | METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION THROUGH UPLINK - A technique according to the present specification relates to a method and apparatus for transmitting control information, which support carrier aggregation, through an uplink. Particularly, bits to be transmitted through a physical uplink control channel (PUCCH) are acquired, and at least one channel state information (CSI) bit indicating a wireless channel state and a plurality of ACK/NACK bits related to a plurality of carriers are acquired and transmitted. In addition, the plurality of ACK/NACK bits and the CSI bit are encoded using different Reed-Muller coding blocks (a first Reed-Muller coding block and a second Reed-Muller coding block). | 04-23-2015 |
20150163038 | COMMUNICATION METHOD USING A CARRIER AGGREGATION AND APPARATUS THEREFORE - A method for a base station to receive an uplink transmission from a user equipment configured with multiple uplink component carriers in a wireless communications system. The method according to one embodiment includes transmitting, to the user equipment, Radio Resource Control (RRC) configuration information for a Sounding Reference Signal (SRS), the RRC configuration information including information for periodically receiving the SRS from the user equipment; transmitting, to the user equipment, Layer 2 (L2) control information indicating states of the plurality of uplink component carriers; and performing a procedure for periodically receiving the SRS from the user equipment on a corresponding uplink component carrier in use of the RRC configuration information. According to whether the corresponding uplink component carrier is in an available state or a non-available state at a time for receiving the SRS, the SRS or no SRS is received from the user equipment, respectively. | 06-11-2015 |
20150230191 | METHOD FOR CONTROLLING TRANSMISSION POWER, AND APPARATUS FOR SAME - A method for controlling transmission power by a communication apparatus in a wireless communication system supporting a plurality of component carriers. A total transmission power of a physical uplink shared channel (PUSCH) is calculated for a PUSCH transmission on a first component carrier and a sounding reference symbol (SRS) for a SRS transmission on a second component carrier. The PUSCH transmission is prioritized rather than the SRS transmission if the PUSCH transmission overlaps with the SRS transmission in a time domain and the total transmission power exceeds a maximum transmission power configured for the communication apparatus. | 08-13-2015 |
20150230238 | METHOD AND APPARATUS FOR TRANSMITTING UPLINK CONTROL INFORMATION IN A WIRELESS COMMUNICATION SYSTEM - A method and apparatus for transmitting control information are discussed. The method can include generating uplink control information (UCI) and transmitting the UCI through an physical uplink control channel (PUCCH) in a subframe, wherein when the subframe is configured for transmission of a scheduling request (SR) and when transmission of a hybrid automatic repeat request (HARQ)-acknowledgement (ACK) coincides with the subframe, transmission power of the PUCCH is determined based on a number of HARQ-ACK information bits and a SR bit. A value of the SR bit can be determined by whether or not the subframe is configured for a scheduling request. | 08-13-2015 |
20150237585 | METHOD FOR CONTROLLING SIGNAL TRANSMISSION POWER AND DEVICE FOR SAME - A method for transmitting signals using a plurality of component carriers in a wireless communication system. The method according to one embodiment includes controlling transmission powers for one or more channels per each component carrier; and checking whether a total transmission power of a plurality of channels for simultaneous transmission over the plurality of component carriers exceeds a total maximum transmission power configured for a communication apparatus or not, the plurality of channels including a physical uplink control channel (PUCCH) and a physical uplink shared channel (PUSCH); and if the total transmission power of the plurality of channels over the plurality of component carriers exceeds the total maximum transmission power, adjusting a transmission power of the PUSCH in such a way that the total transmission power of the plurality of channels over the plurality of component carriers does not exceed the total maximum transmission power transmission power. | 08-20-2015 |
20150245336 | DATA TRANSMISSION METHOD AND DEVICE IN WIRELESS COMMUNICATION SYSTEM - A method, and a user equipment (UE), for transmitting control information. The method according to one embodiment includes receiving a sounding reference signal (SRS) simultaneous transmission parameter; and if the SRS simultaneous transmission parameter is true, transmitting an SRS, and, in cell specific SRS subframes of a primary component carrier, a physical uplink control channel (PUCCH) which coincides in a same subframe as the SRS. The PUCCH using a shortened format carries at least one of a HARQ-ACK and a positive scheduling request (SR). The method according to the embodiment further includes, if the SRS simultaneous transmission parameter is false, transmitting the PUCCH which uses a normal PUCCH format and carries at least one of the HARQ-ACK and the positive SR, while not transmitting, in a secondary component carrier, the SRS which coincides in the same subframe. The transmitting of the PUCCH uses carrier aggregation. | 08-27-2015 |
20150245356 | METHOD AND APPARATUS FOR ADJUSTING SOUND REFERENCE SIGNAL TRANSMISSION POWER - A method, performed by a user equipment, is described for adjusting a transmit power for sounding reference signals (SRS) in a wireless communication system supporting a plurality of cells. A determination is made for each transmit power for a plurality of SRS to be transmitted on a subframe for a serving cell. If a total transmit power for the plurality of SRS to be transmitted on the subframe exceeds a maximum transmit power, the total transmit power is scaled for the plurality of SRS. The total transmit power for the plurality of SRS is scaled with a scaling factor parameter for the serving cell. Values of the scaling factor parameter are the same across serving cells. | 08-27-2015 |
20150263843 | METHOD AND APPARATUS FOR TRANSMITTING A REFERENCE SIGNAL IN A WIRELESS COMMUNICATION SYSTEM - A method of transmitting a reference signal in a wireless communication system, and an apparatus therefore. The method according to one embodiment includes selecting one or more values among a set {0, 3, 6, 8, 10}; cyclically shifting a base sequence based on the one or more values selected from the set {0, 3, 6, 8, 10}; and transmitting the reference signal based on the cyclically shifted base sequence to a base station. The reference signal is transmitted on a first orthogonal frequency division multiplexing (OFDM) symbol and a second OFDM symbol. The first OFDM symbol is a second OFDM symbol among 7 OFDM symbols in one slot. The second OFDM symbol is a sixth OFDM symbol among the 7 OFDM symbols in the slot. | 09-17-2015 |
20150289259 | METHOD AND DEVICE FOR TRANSMITTING CONTROL INFORMATION - A method for transmitting uplink control information by a communication apparatus configured with a plurality of cells including a Primary Cell (PCell) and a Secondary Cell (SCell) in a wireless communication system. Only one Physical Downlink Shared Channel (PDSCH) is received on the PCell among the plurality of cells in a first subframe. Hybrid Automatic Repeat Request Acknowledgement (HARQ-ACK) information about the PDSCH is transmitted through a Physical Uplink Control Channel (PUCCH) in a second subframe configured for Scheduling Request (SR) transmission. For a positive SR in the second subframe, the HARQ-ACK information is transmitted using a SR PUCCH resource. For a negative SR in the second subframe, the HARQ-ACK information is transmitted using a HARQ-ACK PUCCH resource different from the SR PUCCH resource. | 10-08-2015 |
20150304967 | METHOD AND APPARATUS FOR CONTROLLING UPLINK POWER IN A WIRELESS ACCESS SYSTEM - A method for reporting power headroom value in a wireless access system that supports a carrier aggregation, and a user equipment (UE) for performing the method are discussed. The method according to one embodiment includes receiving a uplink transmission grant allocating uplink resources on a predetermined subframe in an anchor uplink component carrier (UL CC); obtaining power headroom value for the anchor UL CC, if the UE is configured with a simultaneous physical uplink control channel (PUCCH) and physical uplink shared channel (PUSCH) transmission; and reporting the power headroom value to a base station. The power headroom value is calculated. | 10-22-2015 |
20150318910 | METHOD AND APPARATUS FOR TRANSMITTING CHANNEL STATE INFORMATION - A method for transmitting channel status information in a wireless communication system. A user equipment (UE) transmits first channel information indicating a set of precoding matrices to a base station (BS) periodically, and transmits second channel information indicating one precoding matrix included in the set of precoding matrices to the BS periodically. The second channel information transmitted in a specific subframe is determined based on first channel information that has most recently been transmitted before the specific subframe. Additionally, the UE calculates a channel quality indicator (CQI) transmitted in the specific subframe based on one precoding matrix specified by the first channel information that has most recently been transmitted before the specific subframe and by the second channel information determined based on the first channel information that has most recently been transmitted before the specific subframe. | 11-05-2015 |
20150351087 | METHOD AND APPARATUS OF TRANSMITTING ACK/NACK - A method for receiving an uplink signal by a base station in a wireless communication system, and the base station therefore are discussed. The method according to one embodiment includes transmitting, by the base station, a physical downlink control channel (PDCCH) via one or more resource units; transmitting, by the base station, a physical downlink shared channel (PDSCH) corresponding to the transmitted PDCCH; and receiving, by the base station, a physical uplink control channel (PUCCH) using a PUCCH resource in response to the transmitted PDSCH. In addition, an index of the PUCCH resource is determined by adding a first index offset and a second index offset to a lowest index of the one or more resource units. Additionally, the first index offset is signaled via the PDCCH and the second index offset is signaled via higher layer signaling. | 12-03-2015 |
20150358127 | METHOD AND APPARATUS FOR TRANSMITTING RECEPTION ACKNOWLEDGEMENT INFORMATION IN WIRELESS COMMUNICATION SYSTEM - A method for configuring an acknowledgement for hybrid automatic repeat request (HARQ), and a user equipment therefore are discussed. The method according to one embodiment includes receiving downlink data through one of first and second downlink component carriers; and determining a resource used for a physical uplink control channel (PUCCH). The resource used for the PUCCH is determined based on a downlink component carrier. If downlink data is received through the first downlink component carrier, the resource used for the PUCCH is determined by using a control channel element (CCE) of a physical downlink control channel (PDCCH). If the downlink data is received through the second downlink component carrier, the resource used for the PUCCH is determined by using a radio resource control (RRC) message. The method according to the embodiment further includes transmitting an acknowledgement (ACK)/negative-acknowledgement (NACK) signal for the downlink data using the resource used for the PUCCH. | 12-10-2015 |
20150365214 | METHOD FOR TRANSMITTING UPLINK AND WIRELESS DEVICE USING SAME - A method is described for uplink transmission in a wireless communication system. A user equipment determines whether to transmit or drop a sounding reference signal (SRS) on a last symbol in an i | 12-17-2015 |
20150365949 | METHOD FOR TRANSMITTING AN UPLINK SIGNAL IN A WIRELESS COMMUNICATION SYSTEM, AND APPARATUS FOR SAME - A method of transmitting a sounding reference signal (SRS) by a user equipment in a wireless communication system, a non-transitory computer readable medium on which a program for executing the method is recorded, and a user equipment for performing the method are discussed. The method according to one embodiment includes receiving a physical downlink control channel (PDCCH) including a carrier indicator field (CIF) and an SRS field via a first component carrier (CC) among a plurality of CCs including the first CC and one or more second CCs, the CIF indicating a specific CC and the SRS field indicating whether the user equipment has to transmit the SRS; transmitting the SRS on an uplink subframe; and receiving a first medium access control (MAC) information. If a bit for the specific CC in a bitmap has been disabled, the specific CC and SRS transmission on the specific CC are deactivated. | 12-17-2015 |
20160006552 | METHOD AND DEVICE FOR TRANSMITTING ACK/NACK IN WIRELESS COMMUNICATION SYSTEM - Provided are a method and a device for transmitting an acknowledgement/not-acknowledgement (ACK/NACK) of a terminal which is set with a plurality of serving cells. The method comprises the steps of: receiving data in a subframe n of a second serving cell; and transmitting an ACK/NACK signal for the data in a subframe n+k | 01-07-2016 |
20160007344 | UPLINK CONTROL INFORMATION TRANSMISSION METHOD AND APPARATUS IN MULTICARRIER SYSTEM - A method for receiving uplink control information in a wireless communication system supporting carrier aggregation (CA), and a base station therefore are discussed. The method according to one embodiment includes transmitting downlink data through a first downlink component carrier (DL CC) or a second DL CC; receiving an acknowledgement/not-acknowledgement (ACK/NACK); and receiving periodic channel state information (CSI). If the ACK/NACK collides with the periodic CSI and the ACK/NACK corresponds to downlink data transmitted through only the first DL CC, both the ACK/NACK and the periodic CSI are received in the same subframe of a first uplink component carrier (UL CC). If the ACK/NACK collides with the periodic CSI and the ACK/NACK corresponds to downlink data transmitted through both the first DL CC and the second DL CC, the periodic CSI is not received and only the ACK/NACK is received in the same subframe of the first UL CC. | 01-07-2016 |
20160050060 | METHOD AND DEVICE FOR EXECUTING HARQ IN TDD-BASED WIRELESS COMMUNICATION SYSTEM - A method for a base station (BS) to perform a hybrid automatic repeat request (HARQ). The BS transmits an uplink (UL) grant for a first subframe of a second serving cell through a first serving cell. The BS receives UL data based on the UL grant in the first subframe, transmits an acknowledgement/non-acknowledgement (ACK/NACK) for the UL data through a physical HARQ indicator channel (PHICH) in subframe i of the first serving cell and receives non-adaptively retransmitted UL data in a second subframe of the second serving cell if a NACK for the UL data has been transmitted through the PHICH in the subframe i of the first serving cell. The first serving cell and the second serving cell use different UL-DL configurations. | 02-18-2016 |
20160073396 | METHOD AND APPARATUS FOR TRANSMITTING UPLINK CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM (As Amended) - Provided is a method and an apparatus for transmitting uplink control information by a terminal in wireless communication system. When a PUCCH resource used for transmitting only periodic CSI from a subframe, the resource is a first resource, and a resource indicated by ARI is a second resource, when a setting allows transmitting together ACK/NACK and the periodic CSI through a PUCCH from the same subframe, the first resource and the second resource are mutually exclusive, and the second resource that is used for transmitting together the ACK/NACK and the periodic CSI uses the resource indicated by the ARI from resources determined by an RRC. | 03-10-2016 |
20160081043 | METHOD FOR CONTROLLING TRANSMISSION POWER, AND APPARATUS FOR SAME - A method and communication apparatus for controlling transmission powers in a wireless communication system supporting a plurality of component carriers are described. When a sounding reference symbol (SRS) transmission overlaps with a physical uplink shared channel (PUSCH) transmission and a physical uplink control channel (PUCCH) transmission in a time domain, a check is made as to whether a total of a PUSCH transmission power for the PUSCH transmission on a first component carrier, a PUCCH transmission power for the PUCCH transmission on the first component carrier and a SRS transmission power for the SRS transmission on a second component carrier exceeds a maximum transmission power configured for the communication apparatus. The SRS is dropped if the total of the PUSCH transmission power, the PUCCH transmission power and the SRS transmission power exceeds the maximum transmission power configured for the communication apparatus. | 03-17-2016 |
20160088612 | METHOD AND DEVICE FOR ACK/NACK TRANSMISSION IN TDD-BASED WIRELESS COMMUNICATION SYSTEM - A method of reporting control information in a wireless communication system in which M downlink time divisional duplex (TDD) subframes are associated with an uplink TDD subframe. A user equipment (UE) receives resource allocation information used for a first physical uplink control channel (PUCCH) format. The UE selects a PUCCH format among a plurality of PUCCH formats including the first PUCCH format and a second PUCCH format. The second PUCCH format is selected if the UE receives a first physical downlink shared channel (PDSCH) in one of the M downlink TDD subframes on the primary cell. The UE receives a second PDSCH with a downlink assignment index (DAT) in one of the M downlink TDD subframes on the primary cell. The UE does not receive a first physical downlink control channel (PDCCH) corresponding to the first PDSCH on the primary cell. | 03-24-2016 |
20160105270 | METHOD AND APPARATUS FOR TRANSMITTING ACK/NACK IN A TDD-BASED WIRELESS COMMUNICATION SYSTEM - A method of configuring a positive acknowledgement (ACK) or negative acknowledgement (NACK) in a wireless communication system based on time division duplex (TDD) in which M, M=4, downlink subframes are associated with an uplink subframe. The method is performed by a user equipment receiving a physical downlink shared channel (PDSCH) and a physical downlink control channel (PDCCH). The user equipment receives at least one downlink transport block in the M downlink subframes from a first serving cell. The user equipment determines ACK/NACK states {HARQ-ACK(1), HARQ-ACK(2), HARQ-ACK(3), HARQ-ACK(4)} for the first serving cell. The use equipment determines an ACK/NACK response based on the ACK/NACK states. | 04-14-2016 |
20160112176 | METHOD AND APPARATUS OF TRANSMITTING ACK/NACK - A method for transmitting an uplink signal by a user equipment (UE) in a wireless communication system, and the UE therefore are discussed. The method according to one embodiment includes receiving, by the UE, control information through a physical downlink control channel (PDCCH); determining, by the UE, a physical uplink control channel (PUCCH) resource by adding a first index offset and a second index offset to a lowest index of one or more resource units used for the PDCCH, the first index offset being signaled through the PDCCH and the second index offset being signaled through higher layer signaling; and transmitting, by the UE, acknowledgment/negative-acknowledgment (ACK/NACK) information using the PUCCH resource. | 04-21-2016 |
20160112968 | METHOD FOR CONTROLLING UPLINK TRANSMISSION POWER AND WIRELESS DEVICE USING SAME - The present invention relates to a method for controlling uplink transmission power and to a wireless device using same in a wireless communication system. The wireless device receives determines uplink transmission power in consideration of the overlap period between subframes between a first serving cell belonging to a first timing advance (TA) group and a second serving cell belonging to the second TA group, and transmits an uplink channel on the basis of the uplink transmission power. | 04-21-2016 |
20160127068 | METHOD AND APPARATUS FOR TRANSMITTING ACK/NACK IN A WIRELESS COMMUNICATION SYSTEM BASED ON TDD - Provided is a method of transmitting ACK/NACK in a TDD-based wireless communication system. The method includes: receiving M downlink subframes associated with an uplink subframe n in each of two serving cells; determining four candidate resources based on the M downlink subframes received in each of the two serving cells; and transmitting an ACK/NACK response for the M downlink subframes by using one resource selected from the four candidate resources in the uplink subframe n, wherein the two serving cells includes a first serving cell and a second serving cell, and wherein among the four candidate resources, a first resource and a second resource are associated with a PDSCH or a SPS release PDCCH for releasing semi-persistent scheduling received in the first serving cell, and a third resource and a fourth resources are associated with a PDSCH received in the second serving cell. | 05-05-2016 |
20160135221 | COMMUNICATION METHOD USING A CARRIER AGGREGATION AND APPARATUS THEREFORE - A method of controlling an uplink transmission in a wireless communications system, and a user equipment therefore are discussed. The method according to one embodiment includes configuring the user equipment with multiple component carriers; receiving first configuration information for allocating one or more component carrier sets; receiving second configuration information for periodically transmitting an uplink signal; receiving control information for configuring states of component carriers, by which a downlink component carrier and an uplink component carrier are controlled to be in a same state; and performing a procedure for periodically transmitting the uplink signal on an uplink component carrier in use of the first configuration information, the second configuration information and the control information. When the uplink component carrier is in the active state, a transmission of the uplink signal is performed. When the uplink component carrier is in the non-active state, the transmission of the uplink signal is skipped. | 05-12-2016 |