Patent application number | Description | Published |
20090080569 | METHOD OF GENERATING REFERENCE SIGNAL IN WIRELESS COMMUNICATION SYSTEM - A method of generating a reference signal includes acquiring a base sequence and acquiring a reference signal sequence with a length N from the base sequence. Good PAPR/CM characteristics of the reference signal can be kept to enhance performance of data demodulation or uplink scheduling. | 03-26-2009 |
20090238064 | METHOD OF TRANSMITTING REFERENCE SIGNAL AND TRANSMITTER USING THE SAME - A method and apparatus of transmitting a reference signal in a wireless communication system is provided. A reference signal sequence is generated by using a pseudo-random sequence. A portion or entirety of the reference signal sequence is mapped to at least one resource block and is transmitted. The pseudo-random sequence is generated by a gold sequence generator which is initialized with initial values obtained by using cell identifier. The reference signal provides low PAPR and high cross correlation characteristic. | 09-24-2009 |
20090241004 | METHOD FOR EFFECTIVELY TRANSMITTING CONTROL SIGNAL IN WIRELESS COMMUNICATION SYSTEM - A method of performing HARQ performed by a user equipment (UE) is provided. The method includes receiving a bundling indicator which indicates the number of bundled downlink subframes, determining whether at least one bundled downlink subframe is missed by comparing the bundling indicator with the number of detected bundled downlink subframes, generating a representative ACK/NACK signal when no bundled downlink subframe is missed, and transmitting the representative ACK/NACK signal on an uplink channel. Recovery capability is maximized and the packet loss is reduced in such a situation that less number of ACK/NACK signals are fed back than that of downlink packets. | 09-24-2009 |
20100103860 | Method of operating relay station in wireless communication system - A method of operating a relay station in a wireless communication system is provided. The method includes operating in a first mode comprising a first sub-mode and a second sub-mode, in the first sub-mode a first downlink and a first uplink between a base station and the relay station being simultaneously activated, in the second sub-mode a second downlink and a second uplink between the relay station and a mobile station being simultaneously activated, and operating in a second mode comprising a third sub-mode and a fourth sub-mode, in the third sub-mode the first downlink and the second uplink being simultaneously activated, in the fourth sub-mode the first uplink and the second downlink being simultaneously activated. | 04-29-2010 |
20100195481 | METHOD OF TRANSMITTING REFERENCE SIGNAL AND TRANSMITTER USING THE SAME - A method and apparatus of transmitting a reference signal in a wireless communication system is provided. A reference signal sequence is generated by using a pseudo-random sequence. A portion or entirety of the reference signal sequence is mapped to at least one resource block and is transmitted. The pseudo-random sequence is generated by a gold sequence generator which is initialized with initial values obtained by using cell identifier. The reference signal provides low PAPR and high cross correlation characteristic. | 08-05-2010 |
20100208629 | METHOD OF PERFORMING HYBRID AUTOMATIC REPEAT REQUEST (HARQ) IN WIRELESS COMMUNICATION SYSTEM - A method of performing hybrid automatic repeat request (HARQ) performed by a user equipment (UE) in a wireless communication system is provided. The method includes receiving downlink assignments in a first subframe, a downlink assignment being transmitted based on a control channel element (CCE), the CCE being a logically indexed resource unit, receiving downlink data on a downlink shared channel in the first subframe, the downlink shared channel being assigned according to the downlink assignments, generating ACK/NACK signals which indicate successful or unsuccessful reception of the downlink data, and transmitting in a second subframe, the ACK/NACK signals by using uplink resources of a subset, the subset being mapped to the first subframe, at least one of the uplink resources being mapped to a plurality of CCEs in the first subframe. Limited resources for uplink feedback are effectively used to support HARQ operation. | 08-19-2010 |
20100281326 | METHOD FOR EFFECTIVELY TRANSMITTING CONTROL SIGNAL IN WIRELESS COMMUNICATION SYSTEM - A method of performing HARQ performed by a user equipment (UE) is provided. The method includes receiving a bundling indicator which indicates the number of bundled downlink subframes, determining whether at least one bundled downlink subframe is missed by comparing the bundling indicator with the number of detected bundled downlink subframes, generating a representative ACK/NACK signal when no bundled downlink subframe is missed, and transmitting the representative ACK/NACK signal on an uplink channel. Recovery capability is maximized and the packet loss is reduced in such a situation that less number of ACK/NACK signals are fed back than that of downlink packets. | 11-04-2010 |
20100290557 | METHOD OF TRANSMITTING REFERENCE SIGNAL AND TRANSMITTER USING THE SAME - A method and apparatus of transmitting a reference signal in a wireless communication system is provided. A reference signal sequence is generated by using a pseudo-random sequence. A portion or entirety of the reference signal sequence is mapped to at least one resource block and is transmitted. The pseudo-random sequence is generated by a gold sequence generator which is initialized with initial values obtained by using cell identifier. The reference signal provides low PAPR and high cross correlation characteristic. | 11-18-2010 |
20100302978 | METHOD OF INDICATING NUMBER OF ANTENNAS IN NETWORK BROADCAST SYSTEM - A method for generating a broadcast signal includes forming an information block for transmission, the information block including a first field comprising a plurality of bits configured to impart information to a first group of user equipment (UEs) regarding a first evolved NodeB (eNodeB) transmit antenna configuration. The method further includes generating error detection bits based upon the information block and scrambling the error detection bits using a mask according to a second eNodeB transmit antenna configuration, such that the mask is configured to impart information to a second group of UEs regarding the second eNodeB transmit antenna configuration. The method also includes generating the broadcast signal having the information block and the scrambled error detection bits, and transmitting the generated broadcast signal via a packet broadcast control channel. | 12-02-2010 |
20110038387 | METHOD OF GENERATING REFERENCE SIGNAL IN WIRELESS COMMUNICATION SYSTEM - A method of generating a reference signal includes acquiring a base sequence and acquiring a reference signal sequence with a length N from the base sequence. Good PAPR/CM characteristics of the reference signal can be kept to enhance performance of data demodulation or uplink scheduling. | 02-17-2011 |
20110261729 | METHOD OF PERFORMING HYBRID AUTOMATIC REPEAT REQUEST (HARQ) IN WIRELESS COMMUNICATION SYSTEM - A method of performing hybrid automatic repeat request (HARQ) performed by a user equipment (UE) in a wireless communication system is provided. The method includes receiving downlink assignments in a first subframe, a downlink assignment being transmitted based on a control channel element (CCE), the CCE being a logically indexed resource unit, receiving downlink data on a downlink shared channel in the first subframe, the downlink shared channel being assigned according to the downlink assignments, generating ACK/NACK signals which indicate successful or unsuccessful reception of the downlink data, and transmitting in a second subframe, the ACK/NACK signals by using uplink resources of a subset, the subset being mapped to the first subframe, at least one of the uplink resources being mapped to a plurality of CCEs in the first subframe. Limited resources for uplink feedback are effectively used to support HARQ operation. | 10-27-2011 |
20120008711 | METHOD OF TRANSMITTING REFERENCE SIGNAL AND TRANSMITTER USING THE SAME - A method and apparatus of transmitting a reference signal in a wireless communication system is provided. A reference signal sequence is generated by using a pseudo-random sequence. A portion or entirety of the reference signal sequence is mapped to at least one resource block and is transmitted. The pseudo-random sequence is generated by a gold sequence generator which is initialized with initial values obtained by using cell identifier. The reference signal provides low PAPR and high cross correlation characteristic. | 01-12-2012 |
20120039285 | METHOD AND APPARATUS FOR TRANSMITTING HARQ ACK/NACK SIGNAL IN MULTI-ANTENNA SYSTEM - A method and apparatus of transmitting an ACK/NACK signal for a hybrid automatic repeat request (HARQ) in a wireless communication system is provided. A first ACK/NACK resource index and a second ACK/NACK resource index based on resources used to transmit a downlink control channel is determined. An ACK/NACK signal for a downlink transport block is transmitted through a plurality of antennas using first ACK/NACK resources obtained from the first ACK/NACK resource index and second ACK/NACK resources obtained from the second ACK/NACK resource index. An HARQ ACK/NACK signal can be reliably transmitted through a plurality of antennas. | 02-16-2012 |
20120057519 | METHOD FOR TRANSMITTING CONTROL SIGNAL TO RELAY NODE AT BASE STATION IN MIMO WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREFOR - A method for transmitting a control signal to a relay node at a base station in a multi-input multi-output (MIMO) wireless communication system is disclosed. The method comprises configuring relay-resource element groups (R-REGs) in a unit of four resource elements (REs) contiguous in the ascending order of subcarrier indexes, except for resource elements for a reference signal (RS); allocating transmission resources to the control signal in a unit of the relay-resource element group; and transmitting the control signal to the relay node by using the allocated transmission resources, wherein the resource elements for the reference signal include resource elements for channel state information-RS (CSI-RS), which include resource elements for a channel state information RS to which a transmission power of 0 is allocated. | 03-08-2012 |
20120076097 | METHOD OF GENERATING REFERENCE SIGNAL IN WIRELESS COMMUNICATION SYSTEM - A method of generating a reference signal includes acquiring a base sequence and acquiring a reference signal sequence with a length N from the base sequence. Good PAPR/CM characteristics of the reference signal can be kept to enhance performance of data demodulation or uplink scheduling. | 03-29-2012 |
20120076098 | METHOD OF GENERATING REFERENCE SIGNAL IN WIRELESS COMMUNICATION SYSTEM - A method of generating a reference signal includes acquiring a base sequence and acquiring a reference signal sequence with a length N from the base sequence. Good PAPR/CM characteristics of the reference signal can be kept to enhance performance of data demodulation or uplink scheduling. | 03-29-2012 |
20120113925 | METHOD FOR EFFECTIVELY TRANSMITTING CONTROL SIGNAL IN WIRELESS COMMUNICATION SYSTEM - A method of performing HARQ performed by a user equipment (UE) is provided. The method includes receiving a bundling indicator which indicates the number of bundled downlink subframes, determining whether at least one bundled downlink subframe is missed by comparing the bundling indicator with the number of detected bundled downlink subframes, generating a representative ACK/NACK signal when no bundled downlink subframe is missed, and transmitting the representative ACK/NACK signal on an uplink channel. Recovery capability is maximized and the packet loss is reduced in such a situation that less number of ACK/NACK signals are fed back than that of downlink packets. | 05-10-2012 |
20120218960 | METHOD FOR SELECTING PMI FOR NON-ADAPTIVE HARQ OPERATION IN A MIMO WIRELESS COMMUNICATION SYSTEM - A method for transmitting an uplink signal at a User Equipment (UE) in a wireless communication system includes receiving, from a Base Station (BS), an uplink scheduling grant for multi-antenna transmission; transmitting the uplink signal precoded using precoding information included in the received uplink scheduling grant to the BS; and retransmitting the uplink signal to the BS according to Acknowledgment/Negative Acknowledgment (ACK/NACK) corresponding to the transmitted uplink signal. The retransmitted uplink signal is precoded using precoding information included in a most recent uplink scheduling grant or a predetermined precoding matrix if an uplink scheduling grant for the retransmission is not received from the BS. | 08-30-2012 |
20120287875 | METHOD AND APPARATUS FOR PROVIDING CHANNEL STATE INFORMATION-REFERENCE SIGNAL (CSI-RS) CONFIGURATION INFORMATION IN A WIRELESS COMMUNICATION SYSTEM SUPPORTING MULTIPLE ANTENNAS - A method and apparatus for transmitting and receiving a Channel State Information-Reference Signal (CSI-RS) in a wireless communication system supporting multiple antennas are disclosed. The method includes transmitting, at a base station, information of one or more CSI-RS configurations to a mobile station, wherein the one or more CSI-RS configurations include one CSI-RS configuration for which the mobile station assumes non-zero transmission power for CSI-RS, transmitting, at the base station, information indicating a CSI-RS configuration for which the mobile station assumes zero transmission power for the CSI-RS among the one or more CSI-RS configurations to the mobile station, mapping, at the base station, CSI-RSs to resource elements of a downlink subframe based on the one or more CSI-RS configurations, and transmitting, at the base station, the downlink subframe mapped with the CSI-RSs to the mobile station. | 11-15-2012 |
20120294207 | METHOD FOR EFFECTIVELY TRANSMITTING CONTROL SIGNAL IN WIRELESS COMMUNICATION SYSTEM - A method of performing HARQ performed by a user equipment (UE) is provided. The method includes receiving a bundling indicator which indicates the number of bundled downlink subframes, determining whether at least one bundled downlink subframe is missed by comparing the bundling indicator with the number of detected bundled downlink subframes, generating a representative ACK/NACK signal when no bundled downlink subframe is missed, and transmitting the representative ACK/NACK signal on an uplink channel. Recovery capability is maximized and the packet loss is reduced in such a situation that less number of ACK/NACK signals are fed back than that of downlink packets. | 11-22-2012 |
20120320816 | METHOD AND APPARATUS FOR DETERMINING SIZE OF TRANSPORT BLOCK TRANSMITTED BY BASE STATION TO RELAY NODE IN RADIO COMMUNICATION SYSTEM - A method for receiving a Relay node dedicated Physical Downlink Shared Channel (R-PDSCH) from a base station by a relay node in a radio communication system is disclosed. The method includes receiving, from the base station, a Modulation and Coding Scheme (MCS) index and the number NR-PDSCHPRB1 of first resource blocks to which the R-PDSCH is transmitted, under the assumption that a Relay node dedicated Physical Downlink Control Channel (R-PDCCH) is not transmitted, estimating the number NR-PDSCHPRB2 of second resource blocks to which the R-PDSCH is actually transmitted, using the number NR-PDSCHPRB1 of the first resource blocks and using the number NR-PDCCHPRB of resource blocks to which the R-PDCCH is transmitted, selecting the size of a transport block mapped to the R-PDSCH, using the number NR-PDSCHPRB2 of the second resource blocks and using a transport block index corresponding to the MCS index, and decoding the R-PDSCH, using the size of the transport block and using a modulation order corresponding to the MCS index. | 12-20-2012 |
20120327884 | APPARATUS FOR TRANSMITTING AN UPLINK SIGNAL AND METHOD THEREOF - An apparatus for transmitting an uplink signal and method thereof are disclosed, by which an uplink signal can be efficiently transmitted in a wireless communication system. The present invention includes receiving a downlink control information (DCI) used for PUSCH (physical uplink shared channel) scheduling, the DCI including an information for resource block allocation, an information for a channel status information request and a plurality of MCS (modulation and coding scheme) informations for a plurality of transport blocks and if a condition is met, transmitting a channel status information only on the PUSCH without a transport block for UL-SCH (uplink shared channel). Moreover, the condition includes a case that: only one transport block is enabled, the MCS information for the enabled transport block indicates an MCS index 29, the information for the channel status information request indicates 1, and the number of allocated resource blocks is equal to or smaller than 4. | 12-27-2012 |
20130010682 | METHOD AND DEVICE FOR RECEIVING DOWNLINK SIGNAL - The present invention relates to A METHOD AND A DEVICE FOR RECEIVING A DOWNLINK SIGNAL IN A WIRELESS COMMUNICATION SYSTEM. More specifically, the method of the present invention comprises the following steps: receiving first control information for downlink scheduling in the first slot of a resource block pair, wherein the first control information includes allocation information on at least one resource unit; receiving a data in the second slot of the resource block pair, when the allocation information on the resource unit having the resource block pair with the first control information has a first value; and attempting to detect second control information for uplink scheduling in the second slot of the resource block pair, when the allocation information on the resource unit having the resource block pair with the first control information has a second value. | 01-10-2013 |
20130034072 | METHOD AND DEVICE FOR RECEIVING DOWNLINK SIGNAL - The present invention relates to a method and a device for receiving a downlink control signal in a wireless communication system. More specifically, the present invention relates to a device and a method for receiving control information, the method comprising the following steps: receiving a subframe which includes two slots; executing a blind decoding for a first control channel in the control channel search region within a first slot; decoding a second control channel using a specific resource within a second slot when the first control channel has been detected; and executing a blind decoding for the second control channel in the control channel search region within the second slot when the first control channel has not been detected. | 02-07-2013 |
20130070642 | METHOD AND APPARATUS FOR TRANSCEIVING DATA IN A WIRELESS LAN SYSTEM - The present description relates to a method in which a station transmits data in a wireless LAN system, comprising the following steps: receiving, from an access point, control information containing station group configuration information, which indicates the configurations of station groups and uplink resource allocation information on the resource allocated to each station group; determining, on the basis of the control information, the station group to which the station belongs; and transmitting uplink data to the access point by contending with other stations in the determined station group. | 03-21-2013 |
20130107920 | METHOD AND DEVICE FOR TRANSMITTING/RECEIVING A SIGNAL BY USING A CODE BOOK IN A WIRELESS COMMUNICATION SYSTEM | 05-02-2013 |
20130114539 | METHOD AND APPARATUS FOR RECEIVING DOWNLINK SIGNALS - The present invention relates to a method and apparatus for receiving downlink signals in a wireless communication system. More specifically, the present invention relates to a method for receiving downlink signals in a wireless communication and an apparatus incorporating the same, wherein the method comprises the steps of: receiving a sub frame having two slots; blind decoding a plurality of R-PDCCH (Relay Physical Downlink Control Channel) candidates in order to receive control data from the search space of a first slot; and determining whether the R-PDCCH conveys control data for downlink transmission or uplink transmission when R-PDCCH was detected in the search space, wherein the control data for the downlink transmission and uplink transmission have an equal size of data. | 05-09-2013 |
20130129014 | Method and Device for Sending and Receiving Precoded Signals on a Wireless Communication System - The present invention relates to a method for transmitting a precoded signal, the method comprising: determining a precoding matrix on the basis of the first matrix, which is determined from a first codebook including precoding matrices indicated by a first precoding matrix index (PMI), and the second matrix, which is determined from a second codebook including precoding matrices indicated by a second PMI; and transmitting the precoded signal using the determined precoding matrix to the receiver, wherein each precoding matrix contained in the first codebook is comprised of a block diagonal matrix, and individual blocks of the block diagonal matrix are configured independently of each other, and each precoding matrix contained in the second codebook is comprised of an upper element and a lower element, where the lower element includes a phase rotation value. | 05-23-2013 |
20130148698 | TRANSMITTING SPREAD SIGNAL IN COMMUNICATION SYSTEM - The present invention provides for spreading a first signal using a plurality of spreading codes, multiplexing the first spread signal by code division multiplexing, transmitting the first multiplexed signal via a plurality of neighboring frequency resources of an OFDM symbol of a first antenna set, spreading a second signal using a plurality of spreading codes, multiplexing the second spread signal by code division multiplexing, transmitting the second multiplexed signal via a plurality of neighboring frequency resources of the OFDM symbol of the first antenna set, transmitting the first multiplexed signal via a plurality of neighboring frequency resources of an OFDM symbol of a second antenna set, and transmitting the second multiplexed signal via a plurality of neighboring frequency resources of the OFDM symbol of the second antenna set, wherein the first multiplexed signal is transmitted on frequency resources that neighbor frequency resources that the second multiplexed signal is transmitted on. | 06-13-2013 |
20130163405 | METHOD FOR SELECTING PMI FOR NON-ADAPTIVE HARQ OPERATION IN A MIMO WIRELESS COMMUNICATION SYSTEM - A method for transmitting an uplink signal at a User Equipment (UE) in a wireless communication system includes receiving, from a Base Station (BS), an uplink scheduling grant for multi-antenna transmission; transmitting the uplink signal precoded using precoding information included in the received uplink scheduling grant to the BS; and retransmitting the uplink signal to the BS according to Acknowledgment/Negative Acknowledgment (ACK/NACK) corresponding to the transmitted uplink signal. The retransmitted uplink signal is precoded using precoding information included in a most recent uplink scheduling grant or a predetermined precoding matrix if an uplink scheduling grant for the retransmission is not received from the BS. | 06-27-2013 |
20130223258 | INTER-CELL INTERFERENCE COORDINATION IN A WIRELESS COMMUNICATION SYSTEM - Disclosed herein is a wireless communication system. More particularly, disclosed herein is a method and apparatus for coordinating and reducing inter-cell interference in a wireless communication system. A method of transmitting channel state information (CSI) measurement resource information by a base station includes determining first and second subframe sets, in which CSI measurement will be performed, among a plurality of downlink subframes, transmitting information indicating the first and second subframe sets to a terminal, and receiving the CSI of each of the first and second subframe sets from the terminal. A subframe belonging to the first subframe set and a subframe belonging to the second subframe set do not overlap, and some of the plurality of subframes do not belong to either of the first and second subframe sets. | 08-29-2013 |
20130225188 | METHOD AND DEVICE FOR MEASURING A DOWNLINK IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more particularly, to a method and device for measuring a downlink in a wireless communication system. According to the present invention, provided is a method for properly and accurately measuring a downlink when an inter-cell interference adjustment is applied. | 08-29-2013 |
20130237247 | POSITIONING METHOD AND APPARATUS IN WIRELESS COMMUNICATION SYSTEM - A method and apparatus for determining a positioning measurement interval in a wireless communication system are disclosed. The method includes acquiring a message including Observed Time Difference of Arrival (OTDOA) related data in a higher layer, wherein the OTDOA related data includes a plurality of cell identifiers and Positioning Reference Signal (PRS) configuration information of corresponding cells, transmitting the ODTOA related data to a physical layer from the higher layer, and determining the RSTD measurement interval by the following Equation by using a plurality of cell-specific PRS periods obtained using the PRS configuration information in the physical layer: T | 09-12-2013 |
20130258992 | METHOD FOR REPORTING CHANNEL STATE INFORMATION IN WIRELESS COMMUNICATION SYSTEM AND DEVICE THEREFOR - The present invention relates to a wireless communication system. More specifically, the present invention relates to a method and a device for reporting channel state information, wherein the method comprises the steps of: receiving, from a first eNode B, a plurality of pieces of configuration information for a periodic report of CSIs that are set according to each eNode B; and transmitting, to said first eNode B, CSIs for the downlink of the corresponding eNode Bs through subframes that are periodically set according to each piece of the configuration information, wherein the subframes that are periodically set according to the configuration information for said first eNode B are used to transmit a CSI for the downlink of said first eNode B, and at least a portion of subframes that are periodically set according to configuration information for a second eNode B is used to transmit information which indicates the relationship between the downlink of said first eNode B and the downlink of said second eNode B. | 10-03-2013 |
20130260793 | TECHNIQUES FOR MEASURING A LOCATION OF UE - The present invention provides a method for measuring a location. The method comprises: receiving, by a User Equipment (UE) and from a serving cell, information on a bandwidth allocated for a positioning reference signal (PRS); receiving, by the User Equipment (UE) and from at least one or more neighbor cells, information on a bandwidth allocated for a PRS; determining whether there is a difference between the bandwidths; and measuring, by the UE and based on a result of the determination a timing difference between PRSs transmitted from the serving cell and the at least one or more neighbor cells. | 10-03-2013 |
20130272189 | METHOD FOR TRANSMITTING UPLINK CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREFOR - The present invention relates to a method for allocating a resource which enables a relay node to transmit uplink control information to a base station in a wireless communication system. Specifically, the method for allocating the resource include the steps of: generating a control information sequence for a backhaul downlink sub-frame between a relay node and a base station; setting symbols for mapping the control information sequence when a plurality of symbols are punctured at a front end or a rear end of a backhaul uplink sub-frame between the relay node and the base station; and performing the time-first-mapping for the control information sequence with respect to resource elements corresponding to the set symbols in a descending order of sub-carrier indexes. | 10-17-2013 |
20130286812 | METHOD OF TRANSMITTING REFERENCE SIGNAL AND TRANSMITTER USING THE SAME - A method and apparatus of transmitting a reference signal in a wireless communication system is provided. A reference signal sequence is generated by using a pseudo-random sequence. A portion or entirety of the reference signal sequence is mapped to at least one resource block and is transmitted. The pseudo-random sequence is generated by a gold sequence generator which is initialized with initial values obtained by using cell identifier. The reference signal provides low PAPR and high cross correlation characteristic. | 10-31-2013 |
20130301596 | METHOD FOR SUPPRESSING INTERFERENCE OF TERMINAL IN MULTIPLE INPUT MULTIPLE OUTPUT WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREFOR - Disclosed is a method for enabling a terminal to process a signal in a wireless communication system. Specifically, the method for enabling a terminal to process a signal in the wireless communication system includes the steps of: estimating a recommended transmission beamforming vector and a prior received filtering vector; calculating an effective channel for an adjacent cell by applying the prior received filtering vector to a signal received from the adjacent cell; estimating a constraint beamforming vector for the adjacent cell on the basis of the effective channel; transmitting the information of the transmission beamforming vector and the constraint beamforming vector to the serving cell; receiving adaptive response signals of the transmission beamforming vector and the constraint beamforming vector and the constraint beamforming vector; and receiving the signal to which the transmission beamforming vector is applied, from the serving cell by applying the prior received filtered vector. | 11-14-2013 |
20130315189 | METHOD AND APPARATUS FOR TRANSMITTING CHANNEL STATUS INFORMATION IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more specifically to a method and an apparatus for transmitting channel status information. According to the present invention, a method for enabling a terminal to transmit channel status information (CSI) with respect to cooperative transmission in the wireless communication system, includes the steps of: determining a first precoding matrix indicator (PMI) for a first cell and a second PMI for a second cell; and transmitting the CSI including the first PMI and the second PMI, wherein the CSI is determined on the basis of a coupled precoding matrix in which the first precoding matrix corresponding to the first PMI is coupled with the second precoding matrix corresponding to the second PMI, and the coupled precoding matrix can be determined by a first coupling type or a second coupling type. | 11-28-2013 |
20130329625 | METHOD OF TRANSMITTING RANDOM ACCESS RESPONSE SIGNAL IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREOF - A method of transmitting a random access response signal in a wireless communication system is disclosed. The method includes transmitting a random access preamble to a base station, receiving a random access response included in a data region of a specific subframe from the base station, and transmitting an uplink message to the base station based on uplink grant included in the random access response. If the data region is set to be transmitted through multiple layers based on a UE-specific reference signal and the specific subframe is a Multicast Broadcast Single Frequency Network (MBSFN) subframe, the data region is demodulated based on the UE-specific reference signal on the assumption that the data region is transmitted via a predetermined antenna port using a single-antenna transmission scheme. | 12-12-2013 |
20130329711 | METHOD AND DEVICE FOR COMMUNICATION BETWEEN TERMINALS IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more particularly, to a method and device for communication between terminals in a wireless communication system. According to the present invention, a resource configuration method, a channel configuration method, a transmission power control method, etc. for communication between terminals can be provided. | 12-12-2013 |
20130336425 | APPARATUS AND METHOD FOR PERFORMING PROPERRIZING FREQUENCY SHIFT(P-FRESH) VECTORIZING - To achieve these and other advantages and in accordance with the purpose of the present invention, as embodied and broadly described herein, there is provided a method for performing properizing frequency shift (p-FRESH) vectorizing, the method comprising: converting a scalar-valued input signal of length L into a 2L-by-1 vector-valued output signal including complex conjugate signal of the input signal; modulating the input signal and the complex conjugate signal each with L different carriers; and bandpass filtering the modulated signal to form the output signal, wherein the output signal is band-limited to a half-Nyquist zone (F | 12-19-2013 |
20140016497 | CSI-RS BASED CHANNEL ESTIMATING METHOD IN A WIRELESS COMMUNICATION SYSTEM AND DEVICE FOR SAME - The present invention relates to a user equipment to perform an estimation operation in a wireless communication system. In more detail, the method includes: receiving configuration information of CSI-RSs (channel status information-reference signals) defined by a plurality of antenna ports from a base station; combining CSI-RSs defined by specific antenna ports among the plurality of antenna ports; and performing the measurement based on the combined CSI-RSs. Here, performing the measurement comprises measuring at least one of a RSRP (reference signal received power), a RSRQ (reference signal received quality) and a pathloss based on the combined CSI-RSs. | 01-16-2014 |
20140023121 | TRANSMITTING SPREAD SIGNAL IN COMMUNICATION SYSTEM - A method for receiving Acknowledgement/Negative acknowledgement (ACK/NACK) information in a mobile communication system includes receiving a first signal including first spread ACK/NACK information and second spread ACK/NACK information from a first antenna set of a transmitting end in an orthogonal frequency division multiplexing (OFDM) symbol; receiving a second signal including third spread ACK/NACK information and fourth spread ACK/NACK information from a second antenna set of the transmitting end in an OFDM symbol; and de-spreading at least the first and third spread ACK/NACK information or the second and fourth spread ACK/NACK information for identifying the ACK/NACK information. | 01-23-2014 |
20140029561 | METHOD AND DEVICE FOR TRANSMITTING A SIGNAL IN A MOBILE COMMUNICATION SYSTEM - An embodiment of the present invention relates to a method of a base station to transmit a signal in a wireless communication system. The method includes: transmitting Physical Downlink Control Channel (PDCCH), which includes scheduling information on a resource area of an unlicensed band over a licensed band; and transmitting a sequence, which includes the identifier of a terminal having the resource area allocated, over the unlicensed band. The timing at which the sequence is transmitted may be set prior to a resource area scheduled by the PDCCH. | 01-30-2014 |
20140044084 | METHOD FOR ENABLING TERMINAL TO TRANSMIT ACK/NACK RESPONSE IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREFOR - The present application relates to a method for enabling a terminal to transmit an uplink ACK/NACK (Acknowledgement/negative ACK) response to a base station in a time-division multiplexing wireless communication system. Specifically, the method includes the steps of: receiving a setting for an uplink-downlink subframe from the base station; receiving downlink control information and downlink data information scheduled through the downlink control information, from the base station based on the setting for the uplink-downlink subframe; and transmitting an ACK/NACK response for the downlink data information to the base station, wherein the subframe to which the ACK/NACK response is transmitted is determined according to whether an ending symbol of the downlink control information is after a particular symbol of the sub-frame for receiving the downlink control information. | 02-13-2014 |
20140050191 | METHOD FOR RECEIVING DOWNLINK SIGNAL, AND USER DEVICE, AND METHOD FOR TRANSMITTING DOWNLINK SIGNAL, AND BASE STATION - The present invention provides a method and a device for transmitting/receiving a control channel in a downlink subframe, which divides into a control area and a data area. The present invention enables the downlink control channel transmitted from the data area of a specific carrier wave to be configured to carry scheduling information on another carrier wave. | 02-20-2014 |
20140050192 | METHOD FOR RECEIVING DOWNLINK SIGNAL, AND USER DEVICE, AND METHOD FOR TRANSMITTING DOWNLINK SIGNAL, AND BASE STATION - The present invention provides a method and a device for transmitting/receiving a control channel in a downlink subframe, which divides into a control area and a data area. In the present invention, a first downlink control channel is transmitted in the control area of the downlink subframe, and/or a second downlink control channel is transmitted in the data area of the downlink subframe. The first downlink control channel carries downlink control information having a predetermined format, and the second downlink control channel carries downlink control information having a format corresponding to a transmission mode of a user device. | 02-20-2014 |
20140064203 | METHOD AND DEVICE FOR COMMUNICATING DEVICE-TO-DEVICE - The present invention relates to a wireless communication system, and more specifically, to a method and a device for communicating device-to-device. The method for a first device to transmit a signal to a second device according to one embodiment of the present invention enables the first device to request to a base station a resource allocation for transmitting the signal to the second device, receive from the base station scheduling information for transmitting the signal to the second device, and the signal can be transmitted from the first device to the second device on the basis of the scheduling information, wherein the scheduling information includes information on an uplink resource for transmitting the signal from the first device to the second device. | 03-06-2014 |
20140079015 | MULTIPLEXING METHOD FOR SIGNALS RELATED TO A PLURALITY OF TERMINALS IN A WIRELESS COMMUNICATION SYSTEM APPLYING CARRIER AGGREGATION TECHNIQUES AND APPARATUS THEREFOR - The present description discloses a method for transmitting an uplink signal through a non-licensed band from a terminal in a wireless communication system by applying carrier aggregation techniques. More specifically, the method is characterized by comprising the steps of: receiving an uplink scheduling grant from a base station; determining the availability of a non-licensed band; transmitting a signal for reserving resources if a non-licensed band is available; and transmitting an uplink signal to the base station via the non-licensed band on the basis of the uplink scheduling grant. | 03-20-2014 |
20140079018 | METHOD AND DEVICE FOR TRANSMITTING DATA IN A MULTI ANTENNA WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method for a transmitter to transmitter data to a receiver in a multi wireless communication system. In more detail, the method include: mapping a transmission resource, which is allocated for the data, into the data the in order of a space domain, a frequency domain, and a time domain; and transmitting the data to the receiver by using the mapped transmission resource. The transmission resource includes a plurality of space resources. Each of the plurality of space resources includes a plurality of resource allocation units, which are defined by a specific time resource and a specific frequency resource. The mapping of the transmission resource includes mapping the plurality of complex symbols into the remaining space resources in the order of a frequency resource and a time resource if there is no resource allocation unit allocated to a specific space resource. | 03-20-2014 |
20140126512 | METHOD AND APPARATUS FOR TRANSCEIVING A DOWNLINK HARQ IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more particularly, to a method and apparatus for transceiving a downlink hybrid automatic repeat (HARQ). According to one embodiment of the present invention, a method for setting an HARQ process by a terminal in a wireless communication system may comprise the steps of: receiving, from a base station, limited-resource information indicating a resource the use of which for downlink transmission to the terminal is limited; determining an HARQ process to be activated on the basis of the limited-source information; and performing an HARQ operation for the downlink transmission by means of the HARQ process to be activated. | 05-08-2014 |
20140133427 | METHOD FOR TRANSMITTING OR RECEIVING PDCCH AND USER EQUIPMENT OR BASE STATION FOR THE METHOD - A method for receiving a physical downlink control channel (PDCCH) at a downlink subframe through a user equipment (UE) in a wireless communication system comprises the step of detecting the PDCCH by performing blind decoding for a search space including a plurality of PDCCH candidates included in the downlink subframe, wherein the blind decoding is performed in accordance with order of priority given to each of a plurality of sub-search spaces constituting the search space. | 05-15-2014 |
20140140273 | METHOD AND APPARATUS FOR TRANSCEIVING AN UPLINK HARQ IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more particularly, to a method and apparatus for transceiving an uplink hybrid automatic repeat request (HARQ). According to one embodiment of the present invention, a method for performing a HARQ operation in a terminal of a wireless communication system comprises the steps of: receiving, in a subframe n, an uplink grant message for first uplink data from a base station; determining a first HARQ process from among a plurality of HARQ processes associated with the subframe n; and transmitting, in a subframe n+k, the first uplink data to the base station through the first HARQ process. | 05-22-2014 |
20140241286 | METHOD FOR SELECTING PMI FOR NON-ADAPTIVE HARQ OPERATION IN A MIMO WIRELESS COMMUNICATION SYSTEM - A method for transmitting an uplink signal at a User Equipment (UE) in a wireless communication system includes receiving, from a Base Station (BS), an uplink scheduling grant for multi-antenna transmission; transmitting the uplink signal precoded using precoding information included in the received uplink scheduling grant to the BS; and retransmitting the uplink signal to the BS according to Acknowledgment/Negative Acknowledgment (ACK/NACK) corresponding to the transmitted uplink signal. The retransmitted uplink signal is precoded using precoding information included in a most recent uplink scheduling grant or a predetermined precoding matrix if an uplink scheduling grant for the retransmission is not received from the BS. | 08-28-2014 |
20140269965 | TRANSMITTING SPREAD SIGNAL IN COMMUNICATION SYSTEM - A method for receiving Acknowledgement/Negative acknowledgement (ACK/NACK) information in a mobile communication system includes receiving a first signal including first spread ACK/NACK information and second spread ACK/NACK information from a first antenna set of a transmitting end in an orthogonal frequency division multiplexing (OFDM) symbol; receiving a second signal including third spread ACK/NACK information and fourth spread ACK/NACK information from a second antenna set of the transmitting end in an OFDM symbol; and de-spreading at least the first and third spread ACK/NACK information or the second and fourth spread ACK/NACK information for identifying the ACK/NACK information. | 09-18-2014 |
20140286232 | METHOD FOR TRANSMITTING CONTROL SIGNAL TO RELAY NODE AT BASE STATION IN MIMO WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREFOR - A method for transmitting a control signal to a relay node at a base station in a multi-input multi-output (MIMO) wireless communication system is disclosed. The method comprises configuring relay-resource element groups (R-REGs) in a unit of four resource elements (REs) contiguous in the ascending order of subcarrier indexes, except for resource elements for a reference signal (RS); allocating transmission resources to the control signal in a unit of the relay-resource element group; and transmitting the control signal to the relay node by using the allocated transmission resources, wherein the resource elements for the reference signal include resource elements for channel state information-RS (CSI-RS), which include resource elements for a channel state information RS to which a transmission power of 0 is allocated. | 09-25-2014 |
20140286329 | METHOD OF GENERATING REFERENCE SIGNAL IN WIRELESS COMMUNICATION SYSTEM - A method of generating a reference signal includes acquiring a base sequence and acquiring a reference signal sequence with a length N from the base sequence. Good PAPR/CM characteristics of the reference signal can be kept to enhance performance of data demodulation or uplink scheduling. | 09-25-2014 |
20140321359 | METHOD FOR TRANSMITTING CONTROL INFORMATION AND DEVICE THEREFOR - The present invention relates to a wireless communication system. More specifically, the present invention relates to a method and a device for reporting channel state information, wherein the method comprises the steps of: receiving configuration information for a period report of CSI from a first transmission point; and transmitting, to said first transmission point, a CSI report for the downlink of a transmission point corresponding to a corresponding subframe among a plurality of transmission points through each subframe that is periodically set according to said configuration information, wherein: one or more subframes corresponding to a second transmission point are used to transmit a CSI report for multi-transmission point cooperative transmission, if rank information reported to said first transmission point prior to said CSI report is a critical value or less; and one or more subframes corresponding to said second transmission point are used to transmit a CSI report for single-transmission point transmission, if the rank information reported to said first transmission point prior to said CSI report is said critical value or more. | 10-30-2014 |
20140348075 | METHOD AND DEVICE FOR TRANSMITTING CHANNEL STATE INFORMATION IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system. A method for a terminal to transmit channel state information (CSI) comprises the steps of: determining a precoding matrix by selecting a first precoding matrix and a second precoding matrix; and transmitting the CSI including an index of the said first precoding matrix and an index of the said second precoding matrix. The said first precoding matrix relates to a method for transmitting CSI in which a revision factor according to a relationship between the said terminal and a transmission point is applied. | 11-27-2014 |