Patent application number | Description | Published |
20090125774 | METHOD OF DATA TRANSMISSION USING HARQ - A method of transmitting data from a user terminal to a base station using a hybrid automatic repeat request (HARQ) scheme with a plurality of redundancy versions of said data, each of the redundancy versions (RV) indicating a transmission start position of a data block in a circular buffer is disclosed. For each retransmission, the redundancy version to be used by considering the previously used redundancy version and a predetermined sequence is determined. Within one sequence, at least two redundancy versions following each other have non consecutive start positions. | 05-14-2009 |
20090199066 | METHOD FOR DETERMINING TRANSPORT BLOCK SIZE AND SIGNAL TRANSMISSION METHOD USING THE SAME - A method for determining a transport block size and a signal transmission method using the same are disclosed. When the signal transmission method constructs a transport block size combination by predetermining the transport block size, it prevents the insertion of any dummy bits in consideration of the limitation of an input bit length of an encoder during an encoding step. If a CRC is attached to the transport block and the transport block is segmented into a plurality of code blocks, the signal transmission method can establish a length of the transport block in consideration of a length of the CRC attached to each code block. | 08-06-2009 |
20090316814 | METHOD FOR SIGNALING OF RESOURCE ALLOCATION TO ADJUST GRANULARITY IN CELLULAR MULTI-CARRIER SYSTEM - A method for adjusting a granularity of resource allocation in a wireless mobile communication system supporting a compact scheduling is disclosed. A resource indication value (RIV) corresponds to a start index (S) of one set of consecutive virtual resource blocks (VRBs) and a length of the VRBs. The start index (S) is selected from among ‘s’ values (where s=P+mT12-24-2009 | |
20100054353 | LAYER MAPPING METHOD AND DATA TRANSMISSION METHOD FOR MIMO SYSTEM - A method for indicating a combination between a codeword and a layer in a MIMO communication, system, a layer mapping method, and a data transmission method using the same are disclosed. A minimum number of codeword-layer mapping combinations from among all available combinations based on the numbers of all codewords and all layers are pre-defined in consideration of a ratio of a codeword to a layer, a reception performance of a receiver, and reduction of combinations, so that a data transmission method using the predefined combinations is implemented. If a specific one codeword is mapped to at least two layers, a diversity gain can be acquired. | 03-04-2010 |
20100110982 | Method for transmitting channel quality information based on differential scheme - A method for transmitting channel quality information based on a differential scheme is disclosed. When channel quality information of a predetermined number of sub-bands selected by a receiver in a frequency selective channel is transmitted, total average channel information is transmitted. Channel information of the selected sub-bands is transmitted as sub-band differential information associated with average channel information. In this case, the sub-band differential information may be denoted by a specific value contained positive (+) values. If at least two channel quality information is transmitted by a MIMO system, channel quality information of one channel is transmitted, then channel quality information of the other channel is transmitted as spatial differential information. In this case, the spatial differential information is denoted by a specific value contained in a differential-value range asymmetrical on the basis of “ | 05-06-2010 |
20100118807 | METHOD AND APPARATUS FOR INDICATING DEACTIVATION OF SEMI-PERSISTENT SCHEDULING - A method and apparatus for performing semi-persistent scheduling (SPS) deactivation in a wireless mobile communication system are disclosed. A base station (BS) transmits a downlink control channel to a user equipment (UE), and deactivates the SPS when a binary field indicating resource allocation information contained in the downlink control channel is entirely filled with ‘1’. | 05-13-2010 |
20100195594 | METHOD FOR TRANSMITTING CODEWORDS IN MULTIPLE INPUT MULTIPLE OUTPUT SYSTEM - A method for effectively transmitting/receiving a codeword in a MIMO system is disclosed. In a system including a plurality of predetermined rank structures, a reception end transmits rank information (RI), precoding matrix index (PMI), and channel quality information (CQI) of each codeword to a transmission end. The transmission end selects a rank structure on the basis of information received from the reception end. The transmission end selects only some codeword blocks among a plurality of codeword blocks available for the selected rank structure, transmits signals via the selected codeword blocks, and transmits a null signal for the non-selected codeword blocks. | 08-05-2010 |
20110033001 | Layer mapping method and data transmission method for MIMO system - A method for indicating a combination between a codeword and a layer in a MIMO communication system, a layer mapping method, and a data transmission method using the same are disclosed. A minimum number of codeword-layer mapping combinations from among all available combinations based on the numbers of all codewords and all layers are pre-defined in consideration of a ratio of a codeword to a layer, a reception performance of a receiver, and reduction of combinations, so that a data transmission method using the predefined combinations is implemented. If a specific one codeword is mapped to at least two layers, a diversity gain can be acquired. | 02-10-2011 |
20110080968 | METHOD FOR TRANSMITTING CHANNEL QUALITY INFORMATION IN A MULTIPLE INPUT MULTIPLE OUTPUT SYSTEM - A method for transmitting a CQI in a MIMO system is disclosed. A method for allowing a receiver to feed back a CQI value to a transmitter in a Multiple Input Multiple Output (MIMO) system includes, receiving a transmission (Tx) pilot signal for each Tx antenna from a base station (BS), measuring a first CQI value of a first codeword and a second CQI value of a second codeword on the basis of the pilot signal, and transmitting the first CQI value of the first codeword and the second CQI value of the second codeword to the base station (BS), wherein at least one of the first and second CQI values includes specific information capable of indicating a transmission restriction status of a corresponding codeword. | 04-07-2011 |
20110164582 | METHOD FOR SIGNALING OF RESOURCE ALLOCATION TO ADJUST GRANULARITY IN CELLULAR MULTI-CARRIER SYSTEM - A method for adjusting a granularity of resource allocation in a wireless mobile communication system supporting a compact scheduling is discussed. A resource indication value (RIV) corresponds to a start index (S) of one set of consecutive virtual resource blocks (VRBs) and a length of the VRBs. The start index (S) is selected from among ‘s’ values (where s=P+mT07-07-2011 | |
20110164584 | METHOD AND APPARATUS FOR INDICATING DEACTIVATION OF SEMI-PERSISTENT SCHEDULING - A method and apparatus for performing semi-persistent scheduling (SPS) deactivation in a wireless mobile communication system are disclosed. A base station (BS) transmits a downlink control channel to a user equipment (UE), and deactivates the SPS when a binary field indicating resource allocation information contained in the downlink control channel is entirely filled with ‘1’. | 07-07-2011 |
20110170501 | METHOD FOR SIGNALING OF RESOURCE ALLOCATION TO ADJUST GRANULARITY IN CELLULAR MULTI-CARRIER SYSTEM - A method for adjusting a granularity of resource allocation in a wireless mobile communication system supporting a compact scheduling is discussed. A resource indication value (RIV) corresponds to a start index (S) of one set of consecutive virtual resource blocks (VRBs) and a length of the VRBs. The start index (S) is selected from among ‘s’ values (where s−P+mT07-14-2011 | |
20120069810 | METHOD FOR RECEIVING ACK/NACK SIGNAL IN MOBILE COMMUNICATION SYSTEM - A method for transmitting information of resources for use in transmission of ACK/NACK signals in a mobile communication system is disclosed. An example method for receiving ACK/NACK signals in a mobile communication system is also disclosed. When resources for transmission of data and resources for transmission of control information of the data are scheduled through virtual unit resources, the method identifies information of resources for receiving an ACK/NACK signal for transmission data mapped to information of at least one of a virtual unit resource allocated to the transmission data and a virtual unit resource allocated to control information of the transmission data, and receives the ACK/NACK signal for the transmission data through the information of resources for receiving the ACK/NACK signal. | 03-22-2012 |
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 |
20120082112 | METHOD FOR RECEIVING ACK/NACK SIGNAL IN MOBILE COMMUNICATION SYSTEM - A method for transmitting information of resources for use in transmission of ACK/NACK signals in a mobile communication system is disclosed. An example method for receiving ACK/NACK signals in a mobile communication system is also disclosed. When resources for transmission of data and resources for transmission of control information of the data are scheduled through virtual unit resources, the method identifies information of resources for receiving an ACK/NACK signal for transmission data mapped to information of at least one of a virtual unit resource allocated to the transmission data and a virtual unit resource allocated to control information of the transmission data, and receives the ACK/NACK signal for the transmission data through the information of resources for receiving the ACK/NACK signal. | 04-05-2012 |
20120082113 | METHOD FOR RECEIVING ACK/NACK SIGNAL IN MOBILE COMMUNICATION SYSTEM - A method for transmitting information of resources for use in transmission of ACK/NACK signals in a mobile communication system is disclosed. An example method for receiving ACK/NACK signals in a mobile communication system is also disclosed. When resources for transmission of data and resources for transmission of control information of the data are scheduled through virtual unit resources, the method identifies information of resources for receiving an ACK/NACK signal for transmission data mapped to information of at least one of a virtual unit resource allocated to the transmission data and a virtual unit resource allocated to control information of the transmission data, and receives the ACK/NACK signal for the transmission data through the information of resources for receiving the ACK/NACK signal. | 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 |
20120163350 | METHOD FOR SCHEDULING DISTRIBUTED VIRTUAL RESOURCE BLOCKS - A method for transmitting downlink data using resource blocks at a base station in a wireless mobile communication system includes transmitting downlink data mapped to physical resource blocks (PRBs) to a user equipment, wherein indexes of virtual resource blocks (VRBs) are mapped to indexes of the PRBs for a first slot and a second slot of a subframe, and the indexes of the PRBs for the second slot are shifted with respect to the indexes of the PRBs for the first slot based on a predetermined gap, and wherein a predetermined offset is applied to an index of a PRB when the index of the PRB is equal to or greater than a predetermined threshold. | 06-28-2012 |
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 |
20120269136 | METHOD FOR PERFORMING WIRELESS COMMUNICATION BETWEEN USER EQUIPMENT AND BASE STATION IN A WIRELESS COMMUNICATION SYSTEM SUPPORTING FIRST USER EQUIPMENT USING SINGLE FREQUENCY BAND AND SECOND USER EQUIPMENT USING MULTIPLE FREQUENCY BANDS - A method for performing a wireless communication between a UE and a BS in a wireless communication system supporting a first UE using a single frequency band and a second UE using a plurality of frequency bands, to each of which OFDM is applied, is disclosed. The method includes being allocated one or more downlink component carriers for the second UE from the BS, and receiving the one or more downlink component carriers from the BS by the second UE. The one or more down-link component carriers are cyclically shifted by different cyclic shift values and the cyclic shifting is performed by multiplying each of the one or more downlink component carriers by a linear phase having a different inclination. | 10-25-2012 |
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 |
20120287848 | METHOD AND APPARATUS FOR ALLOCATING RESOURCES IN A WIRELESS COMMUNICATION SYSTEM - A method and apparatus for allocating backhaul resources to a relay in a wireless communication system, particularly a method and apparatus for processing a downlink signal at a relay in a wireless communication system are disclosed. The method includes receiving resource allocation information indicating a resource block set from a Base Station (BS) through higher layer signaling, receiving a downlink subframe, starting from a predetermined Orthogonal Frequency Division Multiplexing (OFDM) symbol, from the BS, monitoring the resource block set in the downlink subframe to receive a physical control channel, and performing an operation according to the received physical control channel. | 11-15-2012 |
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 |
20120311397 | METHOD FOR DETERMINING TRANSPORT BLOCK SIZE AND SIGNAL TRANSMISSION METHOD USING THE SAME - A method and device for determining a size of a transport block based on modulation and coding related information, and resource information. | 12-06-2012 |
20120311414 | METHOD FOR DETERMINING TRANSPORT BLOCK SIZE AND SIGNAL TRANSMISSION METHOD USING THE SAME - A device and method for attaching a CRC code to a transport block and turbo encoding the CRC attached transport block, where the transport block has a predetermined size. | 12-06-2012 |
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 |
20130019145 | METHOD FOR DETERMINING TRANSPORT BLOCK SIZE AND SIGNAL TRANSMISSION METHOD USING THE SAME - A method and device for segmenting, CRC encoding and turbo encoding a CRC attached transport block. | 01-17-2013 |
20130021898 | METHOD AND APPARATUS FOR UPLINK MULTIPLE INPUT MULTIPLE OUTPUT (MIMO) TRANSMISSION - The present description relates to a wireless communication system, and more particularly, to a method and apparatus for uplink multiple input multiple output (MIMO) transmission. A method for performing an uplink MIMO transmission according to one embodiment of the present invention comprises the following steps: transmitting, from a first subframe, a first data block and a second data block through a first HARQ process and a second HARQ process, respectively; receiving, at a second subframe, uplink scheduling control information on the first data block and control information which indicates inactivation of the second data block; setting HARQ feedback information on the second data block to an ACK state; and performing retransmission of the first data block from a third subframe on the basis of the uplink scheduling control information on the first data block. Retransmission of the second data block may not be performed until uplink scheduling control information on the second data block is received. | 01-24-2013 |
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 |
20130101004 | REFERENCE SIGNAL TRANSMISSION METHOD FOR DOWNLINK MULTIPLE INPUT MULTIPLE OUTPUT SYSTEM - A reference signal transmission method in a downlink MIMO system is disclosed. The downlink MIMO system supports a first UE supporting N transmission antennas among a total of M transmission antennas (where M>N) and a second UE supporting the M transmission antennas. The method includes transmitting, by a base station (BS), subframe-associated information which designates a first subframe in which data for the first UE and the second UE is transmitted and a second subframe in which data only for the second UE can be transmitted within a radio frame having a plurality of subframes, and transmitting the first subframe and the second subframe. Reference signals corresponding to antenna ports ‘0’ to ‘N−1’ of the N antennas are mapped to the first subframe, and reference signals corresponding to antenna ports ‘0’ to ‘M−1’ of the M antennas are mapped to the second subframe. | 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 |
20130121247 | METHOD FOR TRANSMITTING CHANNEL QUALITY INFORMATION IN A MULTIPLE INPUT MULTIPLE OUTPUT SYSTEM - A method is provided for transmitting channel quality information (CQI) in a MIMO system. A method for allowing a receiver to feed back a CQI value to a transmitter in a Multiple Input Multiple Output (MIMO) system includes receiving a transmission (Tx) pilot signal for each Tx antenna from a base station (BS), measuring a first CQI value of a first codeword and a second CQI value of a second codeword on the basis of the pilot signal, and transmitting the first CQI value of the first codeword and the second CQI value of the second codeword to the base station (BS), wherein at least one of the first and second CQI values includes specific information capable of indicating a transmission restriction status of a corresponding codeword. | 05-16-2013 |
20130128844 | METHOD FOR SIGNALING OF RESOURCE ALLOCATION TO ADJUST GRANULARITY IN CELLULAR MULTI-CARRIER SYSTEM - A method for adjusting a granularity of resource allocation in a wireless mobile communication system supporting a compact scheduling is discussed. A resource indication value (RIV) corresponds to a start index (S) of one set of consecutive virtual resource blocks (VRBs) and a length of the VRBs. The start index (S) is selected from among ‘s’ values (where s=P+mT05-23-2013 | |
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 |
20130182679 | METHOD AND APPARATUS FOR INDICATING DEACTIVATION OF SEMI-PERSISTENT SCHEDULING - A method and apparatus for performing semi-persistent scheduling (SPS) deactivation in a wireless mobile communication system are disclosed. A base station (BS) transmits a downlink control channel to a user equipment (UE), and deactivates the SPS when a binary field indicating resource allocation information contained in the downlink control channel is entirely filled with ‘1’. | 07-18-2013 |
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 |
20130286981 | METHOD FOR TRANSMITTING CONTROL INFORMATION, AND METHOD FOR GENERATING CODEWORD FOR THE SAME - A method for transmitting downlink control information and a method for generating a codeword for the same are disclosed. In generating a long code having a low code rate, a basic code of which minimum distance between codes is maximized is repeated by a prescribed number of times and bits of the repeated code are adjusted. Therefore, a minimum distance condition between codes of a long code is satisfied and simultaneously the code be simply generated. | 10-31-2013 |
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 |
20130329674 | METHOD FOR SIGNALING OF RESOURCE ALLOCATION TO ADJUST GRANULARITY IN CELLULAR MULTI-CARRIER SYSTEM - A method of receiving downlink signals by a user equipment in a wireless mobile communication system, includes receiving downlink control information including resource block allocation information, wherein the downlink control information is common information for plural users; detecting a resource indication value (RIV) from the resource block allocation information, wherein the RIV indicates a start index (S) of consecutive virtual resource blocks (VRBs) and a length (L) of the consecutive VRBs; and receiving the downlink signals on the consecutive virtual VRBs. | 12-12-2013 |
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 |
20130343363 | METHOD FOR SCHEDULING DISTRIBUTED VIRTUAL RESOURCE BLOCKS - A method for efficiently scheduling virtual resource blocks to physical resource blocks is disclosed. In a wireless mobile communication system, for distributed mapping of consecutively allocated virtual resource blocks to physical resource blocks, when nulls are inserted into a block interleaver used for the mapping, they are uniformly distributed to N | 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 |
20140023007 | RADIO ACCESS METHOD FOR REDUCED PAPR - A wireless communication system is disclosed. A method for performing a radio access in the wireless communication system includes dividing an available frequency band into a plurality of subbands, generating a plurality of frequency domain sequences from a plurality of data symbol sequences by independently performing a Fourier transform process in each of the subbands, independently mapping each of the frequency domain sequences to a corresponding subband, generating one or more transmission symbols by performing an inverse Fourier transform process on the plurality of frequency domain sequences mapped to the available frequency band, and transmitting the one or more transmission symbols to a receiver. | 01-23-2014 |
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 |
20140036834 | METHOD FOR SCHEDULING DISTRIBUTED VIRTUAL RESOURCE BLOCKS - A method for transmitting downlink data using resource blocks at a base station in a wireless mobile communication system includes transmitting downlink data mapped to physical resource blocks (PRBs) to a user equipment, wherein indexes of virtual resource blocks (VRBs) are mapped to indexes of the PRBs for a first slot and a second slot of a subframe, and the indexes of the PRBs for the second slot are shifted with respect to the indexes of the PRBs for the first slot based on a predetermined gap, and wherein a predetermined offset is applied to an index of a PRB when the index of the PRB is equal to or greater than a predetermined threshold. | 02-06-2014 |
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 |
20140092862 | METHOD FOR TRANSMITTING REFERENCE SIGNALS IN A DOWNLINK MULTIPLE INPUT MULTIPLE OUTPUT SYSTEM - In a system having a plurality of cells participating in a Coordinated Multi-Point (CoMP) operation, a method for transmitting Reference Signals (RSs) to User Equipment (UE) includes generating, by Base Station (BS) included in each of the plurality of cells, a subframe including RSs for a UE located in the each of the plurality of cells, and transmitting the generated subframe to the UE by the BS. The RSs include RSs for channel measurement, and RSs for data demodulation, the plurality of cells are grouped according to frequency shift values applied to the RSs for channel measurement and RS allocation patterns are determined for two cells among the plurality of cells according to a predetermined rule. | 04-03-2014 |
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 |
20140185425 | METHOD OF ALLOCATING RESOURCES FOR TRANSMITTING UPLINK SIGNAL IN MIMO WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREOF - A method of allocating resources for transmitting a signal in a Multiple-Input Multiple-Output (MIMO) wireless communication system is disclosed. The method includes allocating one or more spatial resources of a plurality of spatial resources corresponding to first Single Carrier-Frequency Division Multiple Access (SC-FDMA) symbols to a first transport block, allocating one or more other spatial resources of the plurality of spatial resources corresponding to the first SC-FDMA symbols to a second transport block, and allocating spatial resources corresponding to second SC-FDMA symbols to the first transport block and the second transport block. | 07-03-2014 |
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 |
20140219386 | METHOD FOR DETERMINING TRANSPORT BLOCK SIZE AND SIGNAL TRANSMISSION METHOD USING THE SAME - A method for performing, by a first device, channel coding of data to be transmitted to a second device, the method includes: determining a size of a transport block for the data; attaching a first cyclic redundancy check (CRC) code to the transport block having the determined size to produce a first CRC-attached transport block; and segmenting the first CRC-attached transport block into multiple code blocks, wherein the size of the transport block is determined from among a plurality of predetermined transport block sizes such that the multiple code blocks have a same size as each other. | 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 |
20140254526 | METHOD FOR RECEIVING ACK/NACK SIGNAL IN MOBILE COMMUNICATION SYSTEM - A method for transmitting information of resources for use in transmission of ACK/NACK signals in a mobile communication system is disclosed. An example method for receiving ACK/NACK signals in a mobile communication system is also disclosed. When resources for transmission of data and resources for transmission of control information of the data are scheduled through virtual unit resources, the method identifies information of resources for receiving an ACK/NACK signal for transmission data mapped to information of at least one of a virtual unit resource allocated to the transmission data and a virtual unit resource allocated to control information of the transmission data, and receives the ACK/NACK signal for the transmission data through the information of resources for receiving the ACK/NACK 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 |
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 |
20140348057 | METHOD AND APPARATUS FOR ALLOCATING RESOURCES IN A WIRELESS COMMUNICATION SYSTEM - A method of transmitting signals by a base station in a wireless communication system. The method includes transmitting, to a relay node, resource allocation information indicating a Virtual Resource Block (VRB) set through Radio Resource Control (RRC) signaling; and transmitting a downlink subframe including at least one control channel element (CCE) related to the relay node. The at least one CCE is allocated from a specific Orthogonal Frequency Division Multiplexing (OFDM) symbol other than a first OFDM symbol of the downlink subframe. The VRB set is configured for a Relay Physical Downlink Control Channel (R-PDCCH). | 11-27-2014 |
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 |
20140369262 | METHOD FOR TRANSMITTING CHANNEL QUALITY INFORMATION BASED ON DIFFERENTIAL SCHEME - A method for transmitting channel quality information based on a differential scheme is disclosed. When channel quality information of a predetermined number of sub-bands selected by a receiver in a frequency selective channel is transmitted, total average channel information is transmitted. Channel information of the selected sub-bands is transmitted as sub-band differential information associated with average channel information. In this case, the sub-band differential information may be denoted by a specific value contained in a differential-value range including only positive (+) values. If at least two channel quality information is transmitted by a MIMO system, channel quality information of one channel is transmitted, then channel quality information of the other channel is transmitted as spatial differential information. In this case, the spatial differential information is denoted by a specific value contained in a differential-value range asymmetrical on the basis of “0”. | 12-18-2014 |
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 |
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 |
20150016388 | METHOD OF TRANSMITTING SOUNDING REFERENCE SIGNAL IN WIRELESS COMMUNICATION SYSTEM - A method of transmitting a sounding reference signal includes generating a physical uplink control channel (PUCCH) carrying uplink control information on a subframe, the subframe comprising a plurality of SC-FDMA (single carrier-frequency division multiple access) symbols, wherein the uplink control information is punctured on one SC-FDMA symbol in the subframe, and transmitting simultaneously the uplink control information on the PUCCH and a sounding reference signal on the punctured SC-FDMA symbol. The uplink control information and the sounding reference signal can be simultaneously transmitted without affecting a single carrier characteristic. | 01-15-2015 |
20150029905 | DATA TRANSMISSION METHOD AND APPARATUS FOR HALF-DUPLEX DEVICES - The present invention relates to a data transmission method for a half-duplex device in a wireless communication system. The half-duplex device transmits first uplink data to a base station in an n-th subframe. The half-duplex device determines whether to receive downlink data which is a response to the first uplink data from the base station in an (n+r)-th (where r>1) subframe or to transmit second uplink data to the base station. | 01-29-2015 |
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 |
20150063265 | METHOD AND DEVICE FOR ALLOCATING RESOURCES IN MULTIPLE FREQUENCY BAND SYSTEM - A method is described for receiving data from a base station by a first type user equipment (UE) capable of using a plurality of frequency bands based on resource allocation in a first wireless mobile communication system capable of using the plurality of frequency bands. Each of the plurality of frequency bands has a respective bandwidth for a second wireless mobile communication system. Specific control information is received from the base station indicating whether a specific frequency band among the plurality of frequency bands is used for downlink resource allocation or not. Control information reception resources comprise a common resource area and a first type UE-specific resource area. The common resource area is for both the first type UE and a second type UE, the second type UE adapted for the second wireless mobile communication system not capable of using the plurality of frequency bands. | 03-05-2015 |
20150063293 | REFERENCE SIGNAL TRANSMISSION METHOD FOR DOWNLINK MULTIPLE INPUT MULTIPLE OUTPUT SYSTEM - A reference signal transmission method in a downlink MIMO system is disclosed. The downlink MIMO system supports a first UE supporting N transmission antennas among a total of M transmission antennas (where M>N) and a second UE supporting the M transmission antennas. The method includes transmitting, by a base station (BS), subframe-associated information which designates a first subframe in which data for the first UE and the second UE is transmitted and a second subframe in which data only for the second UE can be transmitted within a radio frame having a plurality of subframes, and transmitting the first subframe and the second subframe. Reference signals corresponding to antenna ports ‘0’ to ‘N−1’ of the N antennas are mapped to the first subframe, and reference signals corresponding to antenna ports ‘0’ to ‘M−1’ of the M antennas are mapped to the second subframe. | 03-05-2015 |
20150063294 | METHOD FOR TRANSMITTING REFERENCE SIGNALS IN A DOWNLINK MULTIPLE INPUT MULTIPLE OUTPUT SYSTEM - A method for transmitting, by a base station, configuration information for a reference signal for channel measurement. The method according to one embodiment includes transmitting, to a user equipment, first resource information for indicating a first pattern, first subframe information for indicating a first subframe, second resource information for indicating a second pattern, and second subframe information for indicating a second subframe. The first subframe information includes information indicating a first periodic interval, and the second subframe information indicates information indicating a second periodic interval. Each of the first and second subframes is comprised of two slots—slot 0 and slot 1, and each of the first and second reference signal time-frequency resources is within two OFDM symbols other than OFDM symbols 0, 1, 2, and 3 of the slot 0 and other than OFDM symbols 0, 1, and 3 of the slot 1. | 03-05-2015 |
20150063478 | REFERENCE SIGNAL TRANSMISSION METHOD FOR DOWNLINK MULTIPLE INPUT MULTIPLE OUTPUT SYSTEM - A reference signal transmission method in a downlink MIMO system is disclosed. The downlink MIMO system supports a first UE supporting N transmission antennas among a total of M transmission antennas (where M>N) and a second UE supporting the M transmission antennas. The method includes transmitting, by a base station (BS), subframe-associated information which designates a first subframe in which data for the first UE and the second UE is transmitted and a second subframe in which data only for the second UE can be transmitted within a radio frame having a plurality of subframes, and transmitting the first subframe and the second subframe. Reference signals corresponding to antenna ports ‘0’ to ‘N−1’ of the N antennas are mapped to the first subframe, and reference signals corresponding to antenna ports ‘0’ to ‘M−1’ of the M antennas are mapped to the second subframe. | 03-05-2015 |
20150071048 | METHOD OF ALLOCATING RESOURCES FOR TRANSMITTING UPLINK SIGNAL IN MIMO WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREOF - A method and terminal apparatus are described for performing channel interleaving at a terminal in a multiple-input multiple-output (MIMO) wireless communication system. A number of columns C of an interleaver matrix are assigned as a number of symbols for transmitting data per subframe (N | 03-12-2015 |
20150071049 | METHOD OF ALLOCATING RESOURCES FOR TRANSMITTING UPLINK SIGNAL IN MIMO WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREOF - A method and terminal apparatus are described for allocating resources for transmitting a signal in a multiple-input multiple-output (MIMO) wireless communication system. An uplink signal is transmitted using L layers at a terminal in a multiple-input multiple-output (MIMO) wireless communication system. Modulation symbols are generated by modulating output bit sequences of an interleaver matrix by a unit of log | 03-12-2015 |
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 |