Patent application number | Description | Published |
20090059844 | METHOD OF TRANSMITTING DATA IN MULTIPLE ANTENNA SYSTEM - A method of transmitting data in a wireless communication system comprises receiving feedback data on an uplink data channel, the feedback data comprising a precoding matrix indicator (PMI), wherein the value of the PMI corresponds to an index in a codebook, transmitting a precoding scheme for downlink data on a downlink control channel, wherein the preceding scheme is determined as one of at least two of a transmit diversity irrespective of the received PMI, an acknowledgement indicating preceding according to the received PMI and a new PMI indicating that it is used in precoding downlink data to be transmitted, and transmitting the downlink data on a downlink data channel after applying precoding according to the determined preceding scheme. | 03-05-2009 |
20090088148 | WIRELESS COMMUNICATION SYSTEM FOR MONITORING PHYSICAL DOWNLINK CONTROL CHANNEL - A method of monitoring a physical downlink control channel (PDCCH) in a wireless communication system is provided. A user equipment monitors a set of PDCCH candidates for a search space in a subframe. The search space includes a common search space monitored by all user equipments in a cell and a UE-specific search space monitored by at least one UE in the cell. | 04-02-2009 |
20090190528 | METHOD FOR TRANSMITTING AND RECEIVING CHANNEL STATE INFORMATION PERIODICALLY OR APERIODICALLY - A method for transmitting and receiving channel state information (CSI) periodically and aperiodically is disclosed. The method for aperiodically transmitting channel state information (CSI) by a terminal includes receiving an indicator requesting a channel state information report of a downlink channel from a base station over a downlink control channel, and aperiodically transmitting the channel state information (CSI) to the base station over a physical uplink shared channel (PUSCH) upon receiving the indicator from the base station. | 07-30-2009 |
20090238091 | MONITORING CONTROL CHANNEL IN WIRELESS COMMUNICATION SYSTEM - A method and apparatus of monitoring a physical downlink control channel (PDCCH) is disclosed. A starting location of a search space in a control region of a subframe k is acquired. The search space is defined by a set of PDCCHs at each aggregation level. The set of PDCCHs from the starting location in the search space at the each aggregation level is monitored. The starting location is defined by the multiple of the aggregation level in the control region. | 09-24-2009 |
20090245410 | Method for transmitting signals for reducing feedback overhead and method for transmitting feedback information for the same - A method for transmitting signals to reduce feedback overhead and a method for transmitting feedback information for the same are described. In transmitting signals through precoding, different codebook subsets are used in an open-loop transmission mode and a closed-loop transmission mode, thereby reducing feedback overhead. In this case, it is assumed that the codebook subsets for the respective transmission modes are optimized according to each transmission mode. | 10-01-2009 |
20090262848 | METHOD OF DESIGNING A MULTIPLEXING STRUCTURE FOR RESOURCE ALLOCATION TO SUPPORT LEGACY SYSTEM - New multiplexing UL structures for supporting legacy system are provided. A 16m system of diversity mode can be multiplexed with 16e system in PUSC mode in FDM manner with the same tiles/permutation rules. A 16m system can be multiplexed with 16e system in AMC mode in FDM and/or TDM manner. The time length of multiplexed 16e PUSC packets and/or 16m packets can be extended to more than two sub-frames for UL coverage. A PRU for 16m system may consists of 16 sub-carriers by 6 OFDMA symbols, 18 sub-carriers by 6 OFDMA symbols, or 20 sub-carriers by 6 OFDMA symbols when FDM is used. | 10-22-2009 |
20090262854 | Method for transmitting and receiving downlink control information - A method for efficiently transmitting and receiving downlink control information is disclosed. The method includes, at an base station, receiving feedback information including a preceding matrix index (PMI) from an user equipment (UE) and transmitting precoding information having a predetermined bit number according to the number of antenna ports and a transmission mode of the base station. The preceding information of a predetermined transmission mode in the preceding information includes confirmation information indicating that the base station uses a PMI which is recently received from the UE. At this time, if the confirmation information is transmitted via a specific resource block (RB) of an n | 10-22-2009 |
20100031117 | Method for specifying transport block to codeword mapping and downlink signal transmission method using the same - A method for specifying a transport block-to-codeword mapping relationship and a method for transmitting a downlink signal using the same are described. If a swap flag has a first logic value, a first transport block is mapped to a first codeword and a second transport block is mapped to a second codeword. If the swap flag has a second logic value, the first transport block is mapped to the second codeword and the second transport block is mapped to the first codeword. If the size of any one of two transport blocks is 0, the swap flag is not used. | 02-04-2010 |
20100046460 | METHOD OF TRANSMITTING UPLINK CONTROL SIGNALS IN WIRELESS COMMUNICATION SYSTEM - A method of transmitting uplink control signals in a wireless communication system includes preparing a ACK/NACK resource for transmitting the ACK/NACK signal for HARQ of downlink data on an uplink control channel, preparing a scheduling request resource for transmitting a scheduling request and the ACK/NACK signal on the uplink control channel in one subframe, and transmitting the ACK/NACK signal on the uplink control channel configured by the scheduling request resource for the positive transmission of the scheduling request and transmitting the ACK/NACK signal on the uplink control channel configured by the ACK/NACK resource for negative transmission of the scheduling request. | 02-25-2010 |
20100054144 | METHOD AND APPARATUS FOR SELECTING MODULATION AND CODING SCHEME (MCS) INDEX BASED ON FREQUENCY SELECTIVITY - A method of selecting a modulation and coding scheme (MCS) index in a wireless communication system is disclosed. More specifically, the method includes measuring a frequency selectivity of a receiving channel, selecting a MCS index having a coding rate below a prescribed coding rate threshold value if the measured frequency selectivity is greater than or equal to a specified frequency selectivity threshold, and selecting the MCS index having the coding rate above or equal to the prescribed coding rate threshold value if the measured frequency selectivity is less than the specified frequency selectivity threshold. | 03-04-2010 |
20100069028 | ANTENNA SWITCHING METHOD AND METHOD FOR TRANSMITTING AND RECEIVING SIGNALS FOR THE SAME - A closed-loop antenna switching method, a reference signal allocating method, and a feedback signal transmitting method for the same are disclosed. Namely, by transmitting a reference signal via the plurality of transmitting antennas via the antenna switching for reference signal transmission for each prescribed multiple period of an antenna selection period, efficient antenna index information can be fed back. By setting an antenna switching period to a prescribed multiple of an antenna selection period, it is able to prevent power loss and data decoding performance degradation. And, the present invention includes transmitting a sounding reference signal (SRS) for each band selection period via at least one of the plurality of transmitting antennas and transmitting at least one data demodulation reference signal (DMRS) between the band selection periods via an antenna for not transmitting data by reference signal transmission antenna switching. | 03-18-2010 |
20100118800 | METHOD FOR TRANSMITTING DOWNLINK CONTROL CHANNEL IN A MOBILE COMMUNICATIONS SYSTEM AND A METHOD FOR MAPPING THE CONTROL CHANNEL TO PHYSICAL RESOURCE USING BLOCK INTERLEAVER IN A MOBILE COMMUNICATIONS SYSTEM - A method for transmitting a downlink control channel in a mobile communication system and a method for mapping the control channel to physical resources using a block interleaver are provided. In order to transmit a downlink control channel in a mobile communication system, information bits are modulated to generate one or more modulation symbols according to a specific modulation scheme, the modulation symbols are interleaved using a block interleaver, and the interleaved modulated symbols are mapped to resource elements allocated for transmission of at least one control channel in a subframe, thereby transmitting the at least one control channel. | 05-13-2010 |
20100118828 | Method of transmitting scheduling request in a wireless communication system - A method of transmitting a scheduling request which is used to request a radio resource for uplink transmission includes configuring an uplink control channel for transmission of a scheduling request in a subframe, the subframe comprising two consecutive slots, a slot comprising a plurality of single carrier-frequency division multiple access (SC-FDMA) symbols, the scheduling request being carried by presence or absence of transmission of the uplink control channel, and transmitting the scheduling request on the uplink control channel. | 05-13-2010 |
20100157933 | METHOD FOR PERFORMING RANGING PROCEDURE - A method for performing a ranging procedure includes transmitting a ranging request message through a randomly selected ranging slot to a base station, the ranging request message comprising a randomly selected ranging code, and receiving a ranging response message including collision information which informs that collision occurs when at least two user equipments transmit the same ranging code to the base station through the same ranging slot. Delay in the ranging can be reduced. | 06-24-2010 |
20100177843 | METHOD FOR TRANSMITTING SIGNALS FOR ACHIEVING DIVERSITY GAIN - A method for transmitting signals for achieving diversity gain is provided. In a communication system having multiple independent transmission paths, a signal is transmitted by mapping it to different independent transmission paths at initial transmission and at retransmission, thereby obtaining diversity gain. Especially, real and ideal components of a transmission signal are mapped to different transmission paths, thereby obtaining additional gain. | 07-15-2010 |
20100199145 | METHOD AND APPARATUS FOR TURBO ENCODING - An apparatus for encoding an information bit stream using turbo code is provided. The apparatus includes a temporary bit generator for creating a temporary bit stream, an interleaver for independently receiving the information bit stream and the temporary bit stream, a first constituent encoder for independently receiving the information bit stream and the temporary bit stream and generating a first parity bit stream and a second constituent encoder for receiving an output of the interleaver and generating a second parity bit stream. Performance of a turbo code can be enhanced without changing a code rate by making a decoded bit stream longer. | 08-05-2010 |
20100220614 | METHOD OF PERFORMING CHANNEL SOUNDING IN FREQUENCY DUPLEX SYSTEM - A method of performing channel sounding in a frequency division duplex (FDD) system in which an uplink frame and a downlink frame use different frequency bands includes dividing a transmission bandwidth with respect to the uplink frame into a plurality of sounding zones, allocating at least one of the plurality of sounding zones to a user equipment and receiving a sounding signal from the user equipment through the allocated sounding zone. Inter-cell interference can be mitigated and overhead due to transmission of the sounding signal can be reduced. | 09-02-2010 |
20100238875 | METHOD FOR TRANSMITTING VOIP PACKET - A method for transmitting a voice over Internet protocol (VoIP) packet includes allocating a radio resource for VoIP packet transmission to a user, transitioning a VoIP service from a talk period, in which the VoIP packet is transmitted using the radio resource, to a silence period in which the VoIP packet is not transmitted, releasing the radio resource during the silence period, and transitioning the VoIP service to the talk period by reallocating the radio resource. Limited radio resources can be further effectively used. | 09-23-2010 |
20100246604 | METHOD FOR MULTIPLEXING DATA INFORMATION AND CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM - A method for multiplexing a control information stream, and a data information stream comprised of systematic symbols and non-systematic symbols in a wireless mobile communication system is described. The multiplexing method includes mapping the data information stream to a resource area, so that the systematic bit symbols are not mapped to a specific resource area where the control information stream is to be mapped, and mapping the control information stream to the specific resource area. | 09-30-2010 |
20100254268 | METHOD AND APPARATUS FOR MONITORING CONTROL CHANNEL IN MULTIPLE CARRIER SYSTEM - A method and apparatus of monitoring a control channel in a multiple carrier system is provided. A user equipment monitors a plurality of candidate control channels within a control region of a subframe and receives reference control information on a reference control channel which is successfully decoded. The user equipment monitors the control region on a basis of the reference control information and receives link control information on a linked control channel which is successfully decoded. The link control information includes resource assignment information used to receive or transmit data packets via a plurality of component carriers. | 10-07-2010 |
20100254331 | METHOD FOR MULTIPLEXING DATA AND CONTROL INFORMATION - A method for multiplexing a data information stream and two types of control information streams in a wireless mobile communication system is described. The method includes mapping first control information in units of resource elements onto a matrix for generating input information mapped to a resource block, and mapping second control information onto the matrix so as to map the second control information to resource elements adjacent in a time axis to resource elements allocated for a reference signal in the resource block. The first control information is mapped downwards starting from the first row so as not to overwrite the resource element allocated for the reference signal. | 10-07-2010 |
20100254471 | METHOD OF TRANSMITTING POWER INFORMATION IN WIRELESS COMMUNICATION SYSTEM - A method of transmitting power information in a wireless communication system is provided. The method includes: determining energy per resource element (RE) to which a reference signal or data is mapped for downlink transmission; and transmitting power information of the reference signal and the data, wherein the reference signal comprises a channel state indication-reference signal (CSI-RS) for channel state measurement, power information of the CSI-RS is denoted by a ratio of power for a CSI-RS RE and power for a data RE of an orthogonal frequency division multiplexing (OFDM) symbol on which only data is transmitted or power for a cell-specific RS (CRS) RE used for channel state measurement and data demodulation of different OFDM symbols. | 10-07-2010 |
20100265862 | METHOD OF CONTROLLING POWER IN WIRELESS COMMUNICATION SYSTEM - Provided is a method of controlling power of a downlink channel in a wireless communication system, the method including: transmitting at least one data to a user equipment; receiving feedback information for the data from the user equipment; and controlling downlink transmission power using the feedback information. It is possible to control the power without time delay and additional use of radio resources in a VoIP service which is responsible for satisfying a fixed transmission rate in real time. Moreover, it is possible to control the power without waste of control channels to perform PDCCH link adaptation. | 10-21-2010 |
20100272037 | METHOD OF TRANSMITTING BROADCASTING INFORMATION - A method of transmitting broadcasting information or system information to user equipments in an idle mode or a sleep mode in a radio access system is disclosed. The method of transmitting broadcasting information to a user equipment in an idle mode includes receiving information related to the idle mode, decoding a control channel assigned to a first paging subframe according to the information related to the idle mode, and receiving the broadcasting information via a second paging subframe indicated by the control channel regardless of the information related to the idle mode, if the decoding of the control channel is successful. | 10-28-2010 |
20100273514 | METHOD FOR PERFORMING CoMP OPERATION AND TRANSMITTING FEEDBACK INFORMATION IN A WIRELESS COMMUNICATION SYSTEM - A method for performing a Coordinated Multi-Point (CoMP) operation and transmitting feedback information in a wireless communication system is disclosed. The method includes measuring interference levels or noise and interference variances of reference signals received from one or more neighbor cells, and transmitting to a serving Base Station (BS) information about the measured interference levels or noise and interference variances, and information about a Precoding Matrix Index (PMI) that a mobile station (MS) wants to restrict or recommend for a neighbor cell performing the CoMP operation. | 10-28-2010 |
20100296472 | METHOD FOR TRANSMITTING UE-TRIGGERED CHANNEL STATUS INFORMATION - A method for transmitting a user equipment (UE)-triggered channel status information (CSI) is disclosed. A UE transmits a preamble to an eNode B (eNB) through a random access channel (RACH) or a CSI RACH. The UE receives a response allocating a CSI feedback resource or allocating a resource for negotiation from the eNB. The UE transmits the CSI and a UE ID, or only the CSI to the eNB through a physical uplink shared channel (PUSCH) or a physical uplink control channel (PUCCH). | 11-25-2010 |
20100309793 | METHOD OF ESTIMATING SIGNAL-TO-NOISE RATIO, METHOD OF ADJUSTING FEEDBACK INFORMATION TRANSMISSION, ADAPTIVE MODULATION AND CODING METHOD USING THE SAME, AND TRANSCEIVER THEREOF - A method of estimating a signal-to-noise ratio by considering user mobility, a method of adjusting feedback information transmission, an adaptive modulation and coding method using the same, and a transceiver thereof are disclosed. The present invention includes measuring a first channel parameter and a second channel parameter using first and second symbols sequentially received, respectively, estimating a channel quality considering a time delay between measurements of the first and second channel parameters using the first and second channel parameters, and transmitting information for the estimated channel quality if a variation of the first and second channel parameters is equal to or greater than a prescribed threshold. Accordingly, the present invention reduces performance degradation and feedback overhead caused by a time delay in channel quality estimation. | 12-09-2010 |
20100316014 | METHOD OF DESIGNING A MULTIPLEXING STRUCTURE FOR RESOURCE ALLOCATION TO SUPPORT LEGACY SYSTEM - New multiplexing UL structures for supporting legacy system are provided. A 16m system of diversity mode can be multiplexed with 16e system in PUSC mode in FDM manner with the same tiles/permutation rules. A 16m system can be multiplexed with 16e system in AMC mode in FDM and/or TDM manner. The time length of multiplexed 16e PUSC packets and/or 16m packets can be extended to more than two sub-frames for UL coverage. A PRU for 16m system may consists of 16 sub-carriers by 6 OFDM symbols, 18 sub-carriers by 6 OFDM symbols, or 20 sub-carriers by 6 OFDM symbols. | 12-16-2010 |
20100322161 | ADAPTIVE RESOURCE ALLOCATION METHOD IN A WIRELESS COMMUNICATION SYSTEM AND TRANSCEIVER FOR IMPLEMENTING THE SAME - Methods of allocating data to a plurality of subcarriers in a wireless communication system are disclosed. More specifically, one of the methods includes receiving feedback information from a receiver, calculating a level of mobility of the receiver using the feedback information, determining a resource allocation scheme to use based on the calculated level of mobility, and allocating the data to the plurality of subcarriers based on the determined resource allocation scheme. | 12-23-2010 |
20100325507 | METHOD FOR TRANSMITTING A DATA BLOCK IN RADIO COMMUNICATION SYSTEM - A method of transmitting a data block in a wireless communication system is provided. The method includes transmitting the data block, receiving hybrid automatic repeat request (HARQ) not-acknowledgement (NACK) for the data block, receiving an automatic repeat request (ARQ) feedback message indicating a reception state of the data block, and determining whether to retransmit the data block by using the ARQ feedback message. | 12-23-2010 |
20110002322 | DATA TRANSMISSION METHOD IN A MULTI-CARRIER SYSTEM, AND TRANSMITTER - A transmitter includes a plurality of transmit antennas, a processor configured to process user data, and a single carrier frequency division multiple access (SC-FDMA) signal generator configured to receive the user data and generate SC-FDMA symbols transmitted through the plurality of transmit antennas. The SC-FDMA signal generator independently performs inverse fast Fourier transform (IFFT) for each transmit antenna, and each of the plurality of transmit antennas is associated with each of a plurality of carriers. | 01-06-2011 |
20110014909 | METHOD OF TRANSMITTING INTERFERENCE INFORMATION SIGNAL IN WIRELESS COMMUNICATION SYSTEM - A method of transmitting an interference information signal in a wireless communication system is provided. The method includes receiving a neighbor sounding signal from a mobile station (MS) in a neighbor cell, obtaining an interference information signal based on the neighbor sounding signal and transmitting the interference information signal to a neighbor base station (BS), the neighbor BS which is a BS in the neighbor cell. | 01-20-2011 |
20110021228 | MONITORING CONTROL CHANNEL IN WIRELESS COMMUNICATION SYSTEM - A method and apparatus of monitoring a physical downlink control channel (PDCCH) is disclosed. A starting location of a search space in a control region of a subframe k is acquired. The search space is defined by a set of PDCCHs at each aggregation level. The set of PDCCHs from the starting location in the search space at the each aggregation level is monitored. The starting location is defined by the multiple of the aggregation level in the control region. | 01-27-2011 |
20110038275 | METHOD FOR MONITORING CONTROL CHANNEL IN WIRELESS COMMUNICATION SYSTEM - A method for monitoring a control channel in a wireless communication system is provided. The method includes: dividing a control region of a subframe into a common search space having a variable size and monitored by every user equipment (UE) within a cell and a dedicated search space having a variable size and including at least one UE-specific search space to be monitored by at least one UE within the cell, and monitoring a control channel within the common search space; and monitoring a control channel within the UE-specific search space included in the dedicated search space. The performance of an overall system can be improved by effectively monitoring a downlink control channel. | 02-17-2011 |
20110051668 | METHOD FOR TRANSMITTING AND RECEIVING PAGING INFORMATION IN A BROADBAND WIRELESS ACCESS SYSTEM - A method for efficiently transmitting and receiving a paging message and system information from and in a mobile station of a broadband wireless access system is disclosed. A method for receiving a paging message in a mobile station comprise receiving paging information from a serving base station, the paging information including paging sub group identifier (paging sub_group ID) indicating a paging sub group to which the mobile station belongs; and receiving the paging message for a predetermined paging interval of the paging sub group, wherein the paging sub group is determined separately from a paging group and a geographical location determining the paging group, and is maintained while the mobile station is being operated in an idle mode. | 03-03-2011 |
20110051680 | METHOD OF TRANSMITTING UPLINK CONTROL SIGNALS IN WIRELESS COMMUNICATION SYSTEM - A method and device for transmitting uplink control signals in a wireless communication system, the method including: reserving a preassigned scheduling request (SR) physical uplink control channel (PUCCH) resource used for transmission of a SR; determining a frequency domain sequence and an orthogonal sequence based on the preassigned SR PUCCH resource; spreading an ACK/NACK for Hybrid Automatic Repeat Request (HARQ) with the frequency domain sequence and the orthogonal sequence to generate a mapped sequence; and transmitting the mapped sequence | 03-03-2011 |
20110051824 | METHOD AND APPARATUS FOR PERFORMING HARQ IN A MULTIPLE ANTENNA SYSTEM - A method of performing hybrid automatic repeat request (HARQ) in a multiple-antenna system includes receiving a plurality of codewords through an uplink channel, generating acknowledgment (ACK)/not-acknowledgment (NACK) signals respectively for the plurality of codewords, and transmitting the plurality of ACK/NACK signals through a downlink channel in association with a resource used in transmission of the uplink channel. ACK/NACK signals for each codeword in multiple antenna system can be transmitted. | 03-03-2011 |
20110064159 | METHOD AND APPARATUS FOR TRANSMITTING DOWNLINK SIGNAL IN A MIMO WIRELESS COMMUNICATION SYSTEM - A method and apparatus for transmitting a downlink signal in a multiple input multiple output (MIMO) wireless communication system is disclosed. A method for receiving a downlink signal from a base station to a user equipment in a multiple input multiple output (MIMO) system, which supports dual layer transmission based on first and second antenna ports, comprises receiving downlink control information (DCI) through a downlink control channel; and receiving downlink data through a downlink data channel, the downlink data including one or more of a first transport block and a second transport block, wherein the downlink control information includes a new data indicator (NDI) for each of the first and second transport blocks, and if the first transport block is disabled and the second transport block is enabled, the new data indicator for the first transport block indicates an antenna port through which the second transport block is received. | 03-17-2011 |
20110075621 | METHOD OF ACQUIRING SYSTEM INFORMATION IN WIRELESS COMMUNICATION SYSTEM - A method of acquiring system information in a wireless communication system includes receiving scheduling system information including scheduling information indicating a start time of dynamic system information, monitoring the dynamic system information from a start time of the dynamic system information according to the scheduling system information, and ending the monitoring of the dynamic system information upon receiving a system information end indicator indicating an end time of the dynamic system information. Since an end time of dynamic system information is indicated, a process of acquiring system information can be further effectively performed. | 03-31-2011 |
20110083066 | METHOD FOR DETECTING CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM - A method for detecting control information in a wireless communication system is provided. The method includes checking a cyclic redundancy check (CRC) error by monitoring control channels, determining whether a value of an error check field is equal to a specific value, and, if the value of the error check field is equal to the specific value, detecting the control information on the control channel. | 04-07-2011 |
20110096715 | METHOD FOR TRANSMITTING A SIGNAL USING A RELAY STATION IN A WIRELESS COMMUNICATION SYSTEM - A method of transmitting a signal using a relay station is disclosed. In a wireless communication system, the present invention includes the steps of enabling the relay station to receive the signal via a relay interval in a downlink interval using a first wireless communication scheme and a second wireless communication scheme in common from a base station and enabling the relay station to transmit the received signal to a first terminal using the first wireless communications scheme via a first downlink interval in the downlink interval or to a second terminal using the second wireless communication scheme via a second downlink interval. | 04-28-2011 |
20110122825 | METHOD AND APPARATUS OF RECEIVING DATA IN WIRELESS COMMUNICATION SYSTEM - A method and an apparatus of receiving data in a wireless communication system are provided. The method includes detecting a physical downlink control channel (PDCCH) on which control information is transmitted in a first subframe, and receiving data in at least one second subframe based on the control information. | 05-26-2011 |
20110134867 | METHOD AND APPARATUS FOR TRANSMITTING REFERENCE SIGNAL IN MULTIPLE ANTENNA SYSTEM - A method and an apparatus for transmitting a reference signal in a multiple antenna system are provided. The method includes transmitting a first reference signal based on a first sequence through a first antenna group, and transmitting a second reference signal based on a second sequence through a second antenna group, wherein the first reference signal and the second reference signal are transmitted through a same radio resource. | 06-09-2011 |
20110134968 | METHOD AND APPARATUS FOR INFORMATION TRANSMISSION IN A RADIO COMMUNICATION SYSTEM - The present invention relates to a method and an apparatus for information transmission in a radio communication system. The method includes the steps of creating a first symbol and a second symbol relevant to information, creating a first transmission vector and a second transmission vector on the basis of Alamouti code from the first symbol and the second symbol, and transmitting the first transmission vector via a first antenna and transmitting the second transmission vector via a second antenna. | 06-09-2011 |
20110176502 | METHOD FOR ALLOCATING PHICH AND GENERATING REFERENCE SIGNAL IN SYSTEM USING SINGLE-USER MIMO BASED ON MULTIPLE CODEWORDS WHEN TRANSMITTING UPLINK - The present invention relates to a method for generating an uplink reference signal in a system supporting plural uplink-access transmission modes. The method comprises: a step for transmitting the reference signal configuration information about the configuration of a reference signal from a base station to a user device through an uplink grant PDCCH (Physical Downlink Control Channel), and a step for receiving from the user device a sub-frame including the reference signal that is generated based on the reference signal configuration information. The reference signal configuration information is prepared for plural uplink access transmission modes and includes a cyclic shift value for the sequence of the reference signal. The reference signal is supposed to be transmitted to an uplink, and the user device is set up to be operated in the uplink-access transmission mode that corresponding to the reference signal configuration information. | 07-21-2011 |
20110194500 | METHOD FOR PERFORMING A HARQ IN A MULTIPLE CARRIER SYSTEM - A method of performing hybrid automatic repeat request (HARQ) in a multiple carrier system is provided. A user equipment receives a plurality of downlink data through a plurality of downlink carriers and transmits one acknowledgement (ACK)/not-acknowledgement (NACK) signal for the plurality of downlink data through an uplink carrier. The ACK/NACK signal is an ACK signal when all of the plurality of downlink data are successfully received. | 08-11-2011 |
20110205994 | METHOD AND APPARATUS FOR DATA TRANSMISSION USING A PLURALITY OF RESOURCES IN A MULTIPLE ANTENNA SYSTEM - A method and apparatus are provided for data transmission using a plurality of resources in a multiple antenna system. An m (m>1) number of bits from each encoded bit are mapped onto a resource to form a plurality of modulation symbols. With respect to said plurality of modulation symbols, spatial processing is performed according to a plurality of resources and a plurality of antennae to generate a plurality of transmission symbols. Each of said plurality of transmission symbols is transmitted via each of the corresponding multiple antennae. | 08-25-2011 |
20110216733 | METHOD AND APPARATUS FOR INFORMATION TRANSMISSION IN WIRELESS TRANSMISSION SYSTEM - Provided are a method of information transmission performed by a transmitter in a wireless transmission system and an apparatus for same. Said method comprises a step wherein a first information sequence is generated based on a first transmission symbol and a first resource index, a second information sequence is generated based on a second transmission symbol and a second resource index, a third information sequence is generated based on a third transmission symbol and a third resource index, a fourth information sequence is generated based on a fourth transmission symbol and a fourth resource index, a fifth information sequence is generated based on a fifth transmission symbol and a fifth resource index, a sixth information sequence is generated based on a sixth transmission symbol and a sixth resource index; and a step wherein said first information sequence, said second information sequence, and said third information sequence are transmitted via a first antenna, and said fourth information sequence, said fifth information sequence, and said sixth information sequence are transmitted via a second antenna, respectively. | 09-08-2011 |
20110216846 | METHOD AND USER EQUIPMENT FOR TRANSMITTING PRECODING MATRIX INFORMATION, AND METHOD AND BASE STATION FOR CONFIGURING PRECODING MATRIX - An apparatus and method for a precoding matrix are disclosed. A codebook used for selecting a precoding matrix is comprised of m subgroups each including n precoding matrices. A user equipment indicates a specific precoding matrix selected from the codebook by transmitting to a base station a first codebook index indicating one of the m subgroups and a second codebook index indicating one of n precoding matrices in a subgroup. The base station configures the specific precoding matrix from the codebook based on the first and second codebook indexes. | 09-08-2011 |
20110228709 | METHOD AND APPARATUS FOR RELAYING DATA IN WIRELESS COMMUNICATION SYSTEM BASED ON TDD - The present invention provides a method and an apparatus of relaying data in a wireless communication system based on Time Division Duplex (TDD). A relay station receives downlink data from a base station in an uplink subframe and relays the downlink data to at least one mobile station. Accordingly, the efficiency of resource allocation for a relay station can be improved. | 09-22-2011 |
20110228722 | METHOD AND APPARATUS FOR TRANSMITTING REFERENCE SIGNAL PERFORMED BY RELAY STATION IN WIRELESS COMMUNICATION SYSTEM - A method of transmitting a reference signal performed by a Relay Station (RS) in a wireless communication system comprises allocating a guard time in the front of a backhaul subframe or the end of the backhaul subframe, the backhaul subframe comprising a plurality of slots, each of the plurality of slots comprising a plurality of Orthogonal Frequency Division Multiplexing (OFDM) symbols, and the guard time being a time interval for switching between an access link and a backhaul link, and transmitting a Demodulation Reference Signal (DMRS) to a Base Station (BS) in an OFDM symbol of the backhaul subframe. The OFDM symbol for the DMRS is not over-lapped with the guard time. | 09-22-2011 |
20110228748 | METHOD AND APPARATUS FOR TRANSMITTING DATA IN RADIO COMMUNICATION SYSTEM - The present invention provides a method and an apparatus for transmitting data in a radio communication system. Said method for transmitting data in a radio communication system in which a radio resource for data transmission includes a plurality of data symbols in a time domain, wherein said method comprises the steps of transmitting first data using a space-time block coding (STBC) scheme via a portion of the data symbols from among the plurality of data symbols; and transmitting second data using a cyclic delay diversity (CDD) scheme via the residual data symbols excluding said portion of data symbols. | 09-22-2011 |
20110235743 | METHOD AND BASE STATION FOR RECEIVING REFERENCE SIGNAL, AND METHOD AND USER EQUIPMENT FOR RECEIVING REFERENCE SIGNAL - A base station does not transmit any reference signal (RS) for channel measurement in a subframe in which transmission of an RS collides with transmission of a synchronization signal or a broadcast signal or in a resource block including the synchronization signal or the broadcast signal in the subframe. A user equipment assumes that any RS for channel measurement is not transmitted in a subframe or in a resource block when transmission of an RS collides with transmission of a synchronization signal or a broadcast signal in the subframe or in the resource block. | 09-29-2011 |
20110244873 | METHOD FOR PILOT SYMBOL TRANSMISSION IN DOWNLINK MIMO SYSTEM - The present invention relates to a method for transmitting a pilot signal in a downlink MIMO (Multi Input Multi Output) system that supports a first UE (User Equipment) supporting N number of transmission antennae out of a total of M transmission antennae and supports a second UE supporting said M (M>N) number of transmission antennae. Said method comprises a step wherein a pilot symbol is placed as an image in the resource block (RB) region on a subframe that enables the transmission of a user-specific pilot symbol to said second UE in a base station; and a step wherein the subframe whereon said pilot symbol has been placed as an image is transmitted, wherein said RB region includes a first region and a second region, and the first region and the second region each include a certain number of continuous OFDM symbols on a respective time axis, and on said first region is placed as an image a cell-specific pilot symbol with respect to the transmission antenna ports | 10-06-2011 |
20110255629 | METHOD OF TRANSMITTING DATA IN MULTIPLE ANTENNA SYSTEM - A method of transmitting data in a wireless communication system comprises receiving feedback data on an uplink data channel, the feedback data comprising a precoding matrix indicator (PMI), wherein the value of the PMI corresponds to an index in a codebook, transmitting a precoding scheme for downlink data on a downlink control channel, wherein the precoding scheme is determined as one of at least two of a transmit diversity irrespective of the received PMI, an acknowledgement indicating precoding according to the received PMI and a new PMI indicating that it is used in precoding downlink data to be transmitted, and transmitting the downlink data on a downlink data channel after applying precoding according to the determined precoding scheme. | 10-20-2011 |
20110255635 | DATA TRANSMISSION DEVICE AND METHOD IN A WIRELESS COMMUNICATIONS SYSTEM - The present invention provides a data transmission device and method in a wireless communication system. The device comprises a processor which is connected with the M antennas and which is formed so as to generate data to be transmitted through the M antennas, on the basis of a precoding matrix; the precoding matrix is generated based on a plurality of matrices; and a first matrix, which is one matrix among the plurality of matrices, is selected from within a codebook for N antennas (where N10-20-2011 | |
20110261733 | METHOD FOR TRANSMITTING SUB-FRAME DESIGNATION INFORMATION TO A DOWNLINK IN A RADIO COMMUNICATION SYSTEM - A method of transmitting subframe designating information in downlink in a wireless communication system is disclosed. The present invention includes generating the subframe designating information for designating a subframe of a specific type in a radio frame and transmitting the generated subframe designating information to a user equipment, wherein the subframe designating information includes initial location information indicating an initial location of the subframe of the specific type on the radio frame and period information indicating a period for the subframe of the specific type to be repeated. | 10-27-2011 |
20110268072 | APPARATUS AND METHOD FOR TRANSMITTING SIGNAL IN WIRELESS COMMUNICATION SYSTEM - An apparatus and method for transmitting signals in a wireless communication system are provided. The apparatus includes N antennas, a processor coupled to the N antennas and configured to generate N transmit signals by performing precoding on R spatial streams for R spatial layers, and to transmit the N transmit signals respectively through the N antennas, wherein an information stream, a reference signal sequence, and a reference signal pattern are allocated to each of the R spatial layers, and the reference signal pattern is a time-frequency resource pattern used for transmission of the reference signal sequence, wherein each of the R spatial streams corresponds to one spatial layer, and wherein each of the R spatial streams is generated based on the information stream, reference signal sequence, and reference signal pattern allocated to a corresponding spatial layer. | 11-03-2011 |
20110273996 | WIRELESS APPARATUS FOR A MULTI-CARRIER SYSTEM - A wireless apparatus for a multi-carrier system is disclosed. The wireless apparatus comprises; a control channel unit which monitors a control channel transmitted via at least one carrier from among a plurality of carriers; and a data channel unit which transmits or receives data packets to or from a data channel using the resource allocation received from the control channel. The control channel unit monitors the control channel in a plurality of search space in a subframe. | 11-10-2011 |
20110274071 | METHOD AND APPARATUS FOR RECEIVING AND TRANSMITTING SIGNALS IN WIRELESS COMMUNICATION SYSTEM - A method and apparatus for receiving and transmitting signals in a wireless communication system are provided. The method of receiving signals includes configuring a system mode and receiving the signals according to the system mode, wherein the system mode is either a first system mode or a second system mode, when the system mode is the first system mode, the signals are transmitted through a maximum of N transmit antennas, and when the system mode is the second system mode, the signals are transmitted through a maximum of M (N11-10-2011 | |
20110274102 | SYSTEM INFORMATION TRANSMITTING AND RECEIVING DEVICE - Disclosed are a device and method for transmitting or receiving the system information. The system information transmitting device comprises a processor for transmitting the system information on a broadcast channel, and the system information comprises multi-carrier information relating to a multi-carrier operation. The present invention allows additional information elements to be included in the system information, while also providing backward compatibility with legacy systems | 11-10-2011 |
20110274205 | METHOD FOR TRANSMITTING REFERENCE SIGNAL IN DOWNLINK MULTI-INPUT MULTI-OUTPUT SYSTEM - Provided is a method for transmitting a reference signal (RS) in a downlink multi-input multi-output (MIMO) system which supports a first user equipment (UE) for supporting N transmission antennas from among a total of M transmitting antennas and a second UE for supporting M transmitting antennas (wherein, M>N). The method comprises the steps of: generating a subframe for simultaneously supporting the first UE and the second UE at a base station; transmitting the subframe; and mapping a common reference signal (CRS) for antenna port 0 to antenna port N−1, mapping a CRS for antenna port N to antenna port M−1, and controlling a power level of a CRS for antenna port 0 to antenna port N−1 and a power level of CRS for antenna port N to antenna port M−1, independently from one another, at the subframe. | 11-10-2011 |
20110281536 | APPARATUS AND METHOD FOR TRANSMITTING A REFERENCE SIGNAL IN A RADIO COMMUNICATION SYSTEM - An apparatus and a method for transmitting a reference signal in a radio communication system are provided. The apparatus comprises: N antennas; and a processor which is connected to the N antennas and which generates K (wherein K11-17-2011 | |
20110299449 | METHOD AND APPARATUS OF TRANSMITTING DATA IN MBSFN SUBFRAME IN WIRELESS COMMUNICATION SYSTEM - A method and apparatus of transmitting data in a Multimedia Broadcast multicast service Single Frequency Network (MBSFN) subframe in a wireless communication system is provided. A base station (BS) transmits a physical downlink control channel (PDCCH) to a user equipment in a first orthogonal frequency division multiplexing (OFDM) symbol, transmits reference signals for a plurality of extended antenna ports to the user equipment in a second OFDM symbol by mapping the reference signals to subcarriers, and transmits a physical downlink shared channel (PDSCH) to the user equipment in the second OFDM symbol by mapping the PDSCH to the remaining subcarriers other than the subcarriers to which the reference signals are mapped. | 12-08-2011 |
20110299489 | METHOD FOR CONTROL CHANNEL DETECTION IN A MULTICARRIER SYSTEM - The present invention relates to a method and device for reducing the level of blind decoding complexity when detecting a control channel in a broadband wireless access system supporting multicarrier operation. Examples of the present invention disclose methods for the effective blind decoding of a control channel using an explicit method and implicit methods when sending a control channel based on multicarrier operation as with a control channel for transmitting downlink or uplink allocation information under carrier aggregation conditions. | 12-08-2011 |
20110305289 | METHOD FOR GENERATING DOWNLINK SIGNAL IN DOWNLINK MIMO SYSTEM - A method for generating a downlink signal in a downlink MIMO (Multiple Input Multiple Output) comprises the steps of: mapping at least one transport block to at least one codeword; mapping at least one layer to each codeword; classifying at least one layer mapped to each codeword into a certain number of layer groups and performing layer permutation by the layer groups; and generating an OFDM (Orthogonal Frequency-Division Multiplexing) symbol using a signal which is permutated by the layer groups. A CRC (Cyclic Redundancy Check) is attached by the layer groups. | 12-15-2011 |
20110305290 | DEVICE AND METHOD SUPPORTING MULTI-CARRIER WAVES - Provided are a device and method supporting multi-carrier waves. The device comprises: a multi-carrier control unit for receiving carrier wave allocation data including data relating to allocated carrier waves and deactivating a portion of the carrier waves included in the carrier wave allocation data or else receiving carrier wave control data including data relating to additional carrier waves; and a multi-carrier operation unit which operates using multiple carrier waves allocated on the basis of the carrier wave allocation data and the carrier wave control data. The base station scheduling burden can be reduced and the power consumption of the terminal can be reduced. | 12-15-2011 |
20110310994 | DATA TRANSMISSION METHOD AND APPARATUS IN MULTIPLE ANTENNA SYSTEM - A data transmission method in a multiple antenna system is provided. The method includes: defining a codebook including at least one precoding matrix composed of a plurality of rows and columns, wherein the codebook is at least one of a first type in which all elements of the precoding matrix are non-zero elements, a second type in which any one column of the precoding matrix includes non-zero element and the remaining columns include at least one zero element, and a third type in which all columns of the precoding matrix include at least one zero element; precoding an input symbol by using the defined codebook; and transmitting the precoded symbol. | 12-22-2011 |
20110317610 | DATA-RECEIVING METHOD AND APPARATUS FOR RELAY STATION IN WIRELESS COMMUNICATION SYSTEM - A method for receiving data by a relay station (RS) in a wireless communication system includes: receiving radio resource allocation information via an R-PDCCH (R-Physical Downlink Control Channel); and receiving data from a base station (BS) via an R-PDSCH (R-Physical Downlink Shared Channel) indicated by the radio resource allocation information, wherein the radio resource allocation information includes information regarding an allocation of resource blocks in a frequency domain and information regarding an allocation of OFDM symbols in a time domain. Since the radio resource allocation information providing information regarding a time relationship between a control channel transmitted by the BS to a UE and a control channel transmitted by the RS to a UE connected to the RS is provided, the RS can reliably receive a signal transmitted from the BS in a backhaul link between the BS and the RS in a wireless communication system including the RS. | 12-29-2011 |
20110317641 | METHOD AND APPARATUS FOR TRANSMITTING REFERENCE SIGNAL IN WIRELESS COMMUNICATION SYSTEM - A method and apparatus of transmitting a reference signal in a wireless communication system is provided. A transmitter generates the reference signal, maps the reference signal to a resource region, and transmits the reference signal, mapped to the resource region, to a user equipment (UE). The resource region to which the reference signal is mapped is determined based on at least one of a hybrid automatic repeat request (HARQ) processing time for backhaul link transmission, a position of a backhaul link sub-frame, and a transmission period of the reference signal. | 12-29-2011 |
20110317652 | METHOD AND APPARATUS FOR REPORTING CHANNEL STATE IN MULTI-CARRIER SYSTEM - A method and an apparatus for reporting a channel state in a multi-carrier system are provided. User equipment receives an uplink grant including an uplink resource allocation and a channel quality indicator (CQI) request via one downlink carrier from among a plurality of downlink carriers. The user equipment reports CQIs for the plurality of downlink carriers via a plurality of subframes in accordance with the CQI request. | 12-29-2011 |
20110319012 | OPERATION METHOD AND APPARATUS OF RELAY AND BASE STATION - A method of operating a relay station is provided. The method includes: receiving a beacon signal transmitted by a user equipment; measuring the beacon signal and transmitting a measurement result to a base station; and receiving routing information for the user equipment determined based on the measurement result, wherein the routing information indicates whether the user equipment communicates with the base station via the relay station or communicates with the base station directly. Accordingly, data can be transmitted through a proper path according to a channel state between the user equipment and the base station or the relay station in a wireless communication system employing the relay station, and thus cooperative transmission can be easily achieved between the base station and the relay station, which results in increase of efficiency of using radio resources. | 12-29-2011 |
20120002643 | HANDOVER PERFORMED IN CONSIDERATION OF UPLINK/DOWNLINK COMPONENT CARRIER SETUP - The present invention relates to a wireless communication system which supports carrier aggregation. More particularly, the present invention relates to a method and to an apparatus for enabling a user equipment to perform a handover in a wireless communication system which supports carrier aggregation. The method for performing a handover comprises the steps of: transmitting a measurement report on a target cell to a serving cell; receiving, from the serving cell, a message containing a signature route sequence index, cyclic shift parameters, and information related to the component carrier of the target cell; confirming contention-based signatures generated on the basis of the signature route sequence index and cyclic shift parameters; and transmitting one of said contention-based signatures to the target cell for random access, via one or more component carriers, on the basis of said information related to the component carrier. The present invention also relates to an apparatus for the method. | 01-05-2012 |
20120002740 | METHOD AND APPARATUS FOR TRANSMITTING A REFERENCE SIGNAL IN A WIRELESS COMMUNICATION SYSTEM - A method and an apparatus for transmitting a reference signal in a wireless communication system are provided. A first base station maps a first reference signal to a resource region and transmits the first reference signal to a user equipment. A second base station maps a second reference signal to said resource region and transmits the second reference signal to said user equipment. The resource elements, to which the first reference signal and the second reference signal are mapped in the resource region, are determined in accordance with the index on a Latin square matrix occupied by two different elements, respectively, from among N elements constituting the Latin square matrix with a size of N×N. | 01-05-2012 |
20120008587 | METHOD AND APPARATUS FOR TRANSMITTING SIGNAL IN WIRELESS COMMUNICATION SYSTEM - A method and apparatus for transmitting a signal in a wireless communication system are provided. The method includes: generating R spatial streams each of which is generated on the basis of an information stream and a reference signal; generating N transmit streams on the basis of the R spatial streams and a precoding matrix (where R01-12-2012 | |
20120014349 | CHANNEL-SOUNDING METHOD USING A PLURALITY OF ANTENNAS, AND APPARATUS FOR SAME - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and to an apparatus for transmitting an SRS in a multi-antenna system. The method comprises the steps of: acquiring specific information for discriminating a first antenna group and a second antenna group from among a plurality of antennas, wherein said first antenna group includes one or more antennas which are set to a turned-on state to perform communication with a base station, and said second antenna group includes one or more other antennas which are set to a turned-off state; transmitting an SRS to the base station if a predetermined condition is satisfied, under the condition that the second antenna group is set to the turned-off state; and setting the second antenna group to a turned-off state after the transmission of the SRS. | 01-19-2012 |
20120014477 | METHOD AND APPARATUS FOR TRANSMITTING REFERENCE SIGNAL IN MULTI-ANTENNA SYSTEM - A method for transmitting a reference signal in a multi-antenna system is provided. The method includes: selecting at least one orthogonal frequency division multiplexing (OFDM) symbol in a subframe containing a plurality of OFDM symbols; allocating a channel quality indication reference signal (CQI RS) capable of measuring a channel state for each of a plurality of antennas to the selected at least one OFDM symbol; and transmitting the CQI RS, wherein the CQI RS is allocated to an OFDM symbol which does not overlap with an OFDM symbol to which a common reference signal to be transmitted to all user equipments in a cell or a dedicated reference signal to be transmitted to a specific user equipment in the cell is allocated. | 01-19-2012 |
20120020323 | METHOD AND APPARATUS FOR TRANSMITTING REFERENCE SIGNAL IN WIRELESS COMMUNICATION SYSTEM - A method and apparatus of transmitting a reference signal in a wireless communication system is provided. Demodulation Reference Signals (DMRSs) for a plurality of respective antennas is generated. The DMRSs are mapped to a resource region, and transmitted through the respective corresponding antennas. The DMRSs are multiplexed using at least one of frequency division multiplexing (FDM), code division multiplexing (CDM), and time division multiplexing (TDM) methods and mapped in the resource region. Also, a position of an orthogonal frequency division multiplexing (OFDM) symbol to which the DMRSs are mapped in the resource region is an OFDM symbol to which a physical downlink control channel (PDCCH) and a legacy cell-specific reference signal (CRS) are not mapped. | 01-26-2012 |
20120026963 | METHOD AND DEVICE FOR EFFECTING UPLINK HARQ ON A WIRELESS COMMUNICATIONS SYSTEM - The present invention provides a method and device for effecting uplink HARQ (hybrid automatic repeat request) on a wireless communications system. A terminal receives HARQ setting data from a base station. If the terminal receives a NAC signal for an initial transmission block, the transmission characteristics of a retransmission block for the initial transmission block are adjusted on the basis of the HARQ setting data. | 02-02-2012 |
20120026977 | METHOD AND APPARATUS FOR HANDOVER IN A MULTI-CARRIER SYSTEM - A method and an apparatus for handover in a multi-carrier system are provided. A user equipment receives multi-carrier measurement information from a base station, and measures carriers based on the multi-carrier measurement information. The user equipment performs a handover with a target base station through an access reference carrier which is one of a plurality of component carriers of which the measurement result is reported. The present invention minimizes a delay caused by the handover, and reduces battery consumption of the user equipment. | 02-02-2012 |
20120027120 | METHOD AND APPARATUS FOR TRANSMITTING REFERENCE SIGNAL IN WIRELESS COMMUNICATION SYSTEM - A method and apparatus for transmitting a reference signal in a wireless communication system is provided. CSI-RSs are generated for each of a plurality of antennas. The CSI-RS are mapped to a resource region on a basis of a CSI-RS pattern according to the number of the plurality of antennas. The CSI-RS are transmitted to a user equipment (UE). | 02-02-2012 |
20120033630 | METHOD AND APPARATUS FOR TRANSMITTING REFERENCE SIGNAL - The present invention relates to a wireless communication system, and more specifically, to a method and an apparatus for transmitting an RS (Reference Signal) from a transmission end. The present invention relates to an RS transmission method and an apparatus therefore, comprising the steps of: confirming RS resources which are defined according to each layer; and transmitting the precoded RS for the layers to a receiving end through a multiple antenna, wherein the RS resource includes a 1 | 02-09-2012 |
20120033643 | REFERENCE SIGNAL TRANSMITTING METHOD - The present invention relates to a radio communication system. More particularly, the present invention relates to a reference signal transmitting method in a radio communication system, comprising the steps of generating a subframe including a control area and a data area, allocating a reference signal to a control channel mapped in the control area, and transmitting the subframe. | 02-09-2012 |
20120033647 | METHOD FOR SETTING UP CARRIER IN CARRIER AGGREGATION SYSTEM AND APPARATUS REQUIRED FOR SAME - The present invention relates to a wireless communication system. Specifically, the invention relates to a method for configuring a component carrier at a base station in a wireless communication system, comprising the steps of determining whether initial access is permitted to a user equipment with respect to a downlink component carrier; and transmitting a synchronization channel signal and a broadcast channel signal to at least one user equipment via the downlink component carrier, wherein the initial access permission is applied to said at least one user equipment by modifying at least one of the synchronization channel signal and the broadcast channel signal. | 02-09-2012 |
20120039180 | APPARATUS AND METHOD FOR MONITORING CONTROL CHANNEL IN MULTI-CARRIER SYSTEM - A method and an apparatus for monitoring a control channel in a multi-carrier system are provided. A terminal sets a common downlink carrier for monitoring a plurality of candidate control channels for receiving common control information among multiples carriers, and monitors the candidate control channels within a common search space of the common downlink carrier. The terminal receives common control information on a control channel which has been successfully decoded from among a plurality of candidate control channels. The invention can reduce a load due to blind decoding of the control channels and decrease battery consumption of the terminal. | 02-16-2012 |
20120039232 | METHOD FOR TRANSMITTING SUB-FRAME DESIGNATION INFORMATION TO A DOWNLINK IN A RADIO COMMUNICATION SYSTEM - A method of transmitting subframe designating information in downlink in a wireless communication system is disclosed. The present invention includes generating the subframe designating information for designating a subframe of a specific type in a radio frame and transmitting the generated subframe designating information to a user equipment, wherein the subframe designating information includes initial location information indicating an initial location of the subframe of the specific type on the radio frame and period information indicating a period for the subframe of the specific type to be repeated. | 02-16-2012 |
20120039291 | METHOD FOR TRANSMITTING A CONTROL SIGNAL IN A WIRELESS COMMUNICATION SYSTEM, AND APPARATUS FOR SAME - The present invention discloses a method in which a terminal transmits an acknowledgement/negative acknowledgement (ACK/NACK) signal in a wireless communication system. In detail, the comprises the steps of allocating a first control channel resource to the ACK/NACK signal and a second control channel resource to a channel quality information (CQI) signal, determining the transmission power of the first control channel resource and the transmission power of the second control channel resource in accordance with a preset priority, and transmitting the ACK/NACK signal and the CQI signal to a base station using the control channel resources and the transmission powers corresponding thereto. | 02-16-2012 |
20120039298 | APPARATUS AND METHOD FOR TRANSMITTING A REFERENCE SIGNAL IN A WIRELESS COMMUNICATION SYSTEM - A method of transmitting a reference signal by a base station in a wireless communication system is provided. The method includes: generating a plurality of reference signals for channel measurement, wherein the plurality of reference signals for channel measurement are different types; and transmitting the plurality of reference signals for channel measurement, wherein the plurality of reference signals for channel measurement are transmitted using one or more subframes as a duty cycle. | 02-16-2012 |
20120042221 | METHOD AND APPARATUS FOR IMPLEMENTING A HARQ IN A MULTI-CARRIER SYSTEM - Provided are a method and apparatus for implementing a hybrid automatic repeat request (HARQ). A terminal receives a plurality of transmission blocks through a plurality of downlink component carrier waves, and determines a plurality of ACK/NACK resources for the plurality of transmission blocks. If the plurality of ACK/NACK resources overlaps, the terminal uses the overlapping ACK/NACK resources to transmit one bundled ACK/NACK signal for the plurality of transmission blocks through an uplink component carrier wave. | 02-16-2012 |
20120044821 | CONTROL CHANNEL MONITORING APPARATUS IN MULTI-CARRIER SYSTEM AND METHOD THEREOF - The present invention relates to a method for monitoring a control channel and an apparatus thereof. A reference carrier is set, and then the multi-carrier sends blind decoding area information based on the reference carrier to monitor a control channel. A terminal monitors the control channel based on the blind decoding area information. The terminal performs blind decoding only for a component carrier required, and thus reduces power consumption and reception complexity. | 02-23-2012 |
20120044894 | METHOD AND APPARATUS FOR TRANSMITTING CQI IN WIRELESS COMMUNICATION SYSTEM - A method and apparatus for transmitting a channel quality indicator (CQI) in a wireless communication system are provided. The method includes: receiving a CQI request message requesting a CQI report over a first downlink component carrier; and transmitting a CQI for at least one second downlink component carrier over an uplink component carrier. | 02-23-2012 |
20120063324 | DEVICE AND METHOD FOR MONITORING THE CONTROL CHANNEL IN A MULTICARRIER SYSTEM - The present invention relates to a method and device for monitoring the control channel in a multicarrier system. Each of a plurality of sub-search spaces corresponds to each of a plurality of scheduled component carriers. The terminal monitors a downlink control channel for a scheduled component carrier corresponding to each of the plurality of sub-search spaces. Each of the plurality of sub-search spaces is defined displaced to the extent that they are offset from each other. | 03-15-2012 |
20120063349 | APPARATUS AND METHOD FOR MONITORING CONTROL CHANNEL IN MULTI-CARRIER SYSTEM - Provided are an apparatus and a method for monitoring a control channel in a multiple-carrier system. The user equipment monitors downlink control channels for a plurality of scheduled component carriers in an extended search space. The user equipment receives downlink control information for the scheduled component carrier via a successfully decoded downlink control channel. | 03-15-2012 |
20120063350 | APPARATUS AND METHOD FOR MONITORING CONTROL CHANNEL IN MULTI-CARRIER SYSTEM - Provided are an apparatus and a method for monitoring a control channel in a multi-carrier system. A plurality of sub-search spaces within an extended search space corresponds to a plurality of scheduled component carriers, respectively. Each of the plurality of sub-search spaces includes a plurality of control channel elements (CCEs), and the CCEs of the plurality of sub-search spaces are interleaved with each another within the extended search space. | 03-15-2012 |
20120063351 | DEVICE AND METHOD FOR MONITORING THE CONTROL CHANNEL IN A MULTICARRIER SYSTEM - The present invention relates to a method and device for monitoring the control channel in a multiple carrier system. A terminal determines an extended search space comprising a plurality of sub-search spaces, and each of the plurality of sub-search spaces corresponds to at least one of a plurality of scheduled component carriers. The terminal monitors a downlink control channel for the scheduled component carrier corresponding to each of the plurality of sub-search spaces. At least one of the plurality of sub-search spaces is a shared sub-search space corresponding to at least two of the plurality of scheduled component carriers. | 03-15-2012 |
20120076100 | METHOD AND APPARATUS FOR TRANSMITTING REFERENCE SIGNAL IN MULTI-ANTENNA SYSTEM - Provided are a method and apparatus for transmitting a reference signal in a multi-antenna system. A terminal generates a plurality of reference signal sequences to which cyclic shift values different from each other are allocated, generates an orthogonal frequency division multiplexing (OFDM) symbol to which the plurality of reference signal sequences are mapped, and transmits the OFDM symbol to a base station through a plurality of antennas. The respective cyclic shift values allocated to the respective reference signal sequences are determined on the basis of a parameter n indicated by a cyclic shift field transmitted from a physical downlink control channel (PDCCH). | 03-29-2012 |
20120078933 | DEVICE AND METHOD FOR MONITORING CONTROL CHANNEL IN MULTICARRIER SYSTEM - Provided are a method and a device for monitoring the control channel in a multicarrier system. The terminal determines a plurality of terminal-specific search spaces corresponding respectively to a plurality of scheduled component carriers in a control region within a subframe. The terminal monitors a downlink control channel for the scheduled component carriers corresponding respectively to the plurality of terminal-specific search spaces. | 03-29-2012 |
20120082119 | DATA TRANSMISSION/RECEPTION METHOD AND APPARATUS USING A TRANSMISSION DIVERSITY TECHNIQUE IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a data transmission/reception method using a transmission diversity technique in a wireless communication system. In the data transmission/reception method using the transmission diversity technique in the wireless communication system according to one aspect of the present invention, a base station allocates a downlink resource to a terminal, precodes data for transmitting to the terminal, and allocates the precoded data and a non-precoded demodulation reference signal (DMRS) to the allocated resource in order to transmit same. | 04-05-2012 |
20120087427 | REFERENCE SIGNAL TRANSMITTING METHOD AND DEVICE IN A MULTI-ANTENNA SYSTEM - Provided are a reference signal transmitting method and device in a multi-antenna system. A terminal generates a plurality of reference signal sequences to which different cyclic shift values are allocated, respectively, generates an orthogonal frequency division multiplexing (OFDM) symbol to which the plurality of reference signal sequences are mapped, and transmits the OFDM symbol to a base station through a plurality of antennas. Each cyclic shift value allocated to each reference signal sequence is determined on the basis of a parameter n indicated by a cyclic shift field transmitted from a physical downlink control channel (PDCCH). | 04-12-2012 |
20120093119 | METHOD AND APPARATUS FOR TRANSMITTING SOUNDING REFERENCE SIGNAL IN WIRELESS COMMUNICATION SYSTEM - The present invention provides a method and an apparatus for transmitting a sounding reference signal. A terminal receives from a base station a sounding reference signal (SRS) configuration that includes a cell specific SRS configuration and a terminal specific SRS configuration, via a downlink carrier. The terminal then transmits a sounding reference signal based on the SRS configuration via an uplink carrier that is linked to the downlink carrier. | 04-19-2012 |
20120114021 | METHOD AND APPARATUS FOR CONFIGURING A TRANSMISSION MODE FOR A BACKHAUL LINK TRANSMISSION - Provided is a method for configuring a transmission mode for a backhaul link transmission in a radio communication system including a relay station. The method comprises: a step in which a base station transmits, to the relay station, a relay-physical downlink control channel (R-PDCCH) containing backhaul control information; and a step in which the base station transmits, to the relay station, a relay-physical downlink shared channel (R-PDSCH) containing backhaul data, wherein the R-PDCCH is transmitted in one transmission mode selected from a plurality of predetermined transmission modes, and a reference signal transmitted through the R-PDCCH for the demodulation of the R-PDCCH is determined in accordance with said selected transmission mode. | 05-10-2012 |
20120127948 | METHOD AND APPARATUS FOR TRANSMITTING UPLINK SIGNALS IN WIRELESS COMMUNICATION SYSTEM FOR SUPPORTING MULTIPLE ANTENNA TRANSMISSION - The present invention relates to a wireless communication system, and more particularly to a method and an apparatus for transmitting uplink signals in a wireless communication system for supporting multiple antenna transmissions. The method for transmitting the uplink signals in the wireless communication system for supporting the multiple antenna transmissions according to an embodiment of the present invention comprises the steps of: receiving a PDCCH (Physical Downlink Control Channel) including uplink grant information for indicating a first rank value; precoding uplink data on the basis of the first rank value; precoding uplink control information on the basis of a second rank value; multiplexing the precoded uplink data and the uplink control information on a PUSCH (Physical Uplink Shared Channel) resource; and transmitting the multiplexed uplink data and the uplink control information. The uplink control information can include channel state information and the second rank value can be less than or equal to the first rank value. | 05-24-2012 |
20120127950 | METHOD AND APPARATUS FOR ALLOCATING AN UPLINK CARRIER FOR TRANSMITTING UPLINK CONTROL INFORMATION IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and apparatus for allocating an uplink carrier for transmitting uplink control information in a wireless communication system that supports carrier aggregation. According to one embodiment of the present invention, a method for transmitting uplink control information in a wireless communication system that supports carrier aggregation of M (M≧1) uplink component carriers comprises: a step of receiving setup information on a primary uplink component carrier, from among said M uplink component carriers, via which one or more pieces of uplink control information are to be transmitted; a step of multiplexing said one or more pieces of uplink control information; and a step of transmitting the multiplexed uplink control information through the primary uplink component carrier. | 05-24-2012 |
20120127963 | METHOD AND APPARATUS FOR TRANSMITTING DOWNLINK REFERENCE SIGNAL IN WIRELESS COMMUNICATION SYSTEM THAT SUPPORTS MULTIPLE ANTENNAS - A method for transmitting a channel status information reference signals (CSI-RSs) for a maximum of eight antenna ports includes mapping the CSI-RSs for a maximum of eight antenna ports onto a data region of a downlink subframe having a normal cyclic prefix (CP) configuration according to a predetermined pattern; and transmitting the downlink subframe to which the CSI-RSs mapped, wherein the predetermined pattern defines the CSI-RSs to be mapped onto two OFDM symbols of the data region in the downlink subframe and mapped to at least one of four subcarrier positions in each of the two OFDM symbols, and wherein the four subcarrier positions defined by the predetermined pattern may be two consecutive subcarrier positions and two other consecutive subcarrier positions spaced apart by four subcarriers. | 05-24-2012 |
20120128088 | ADAPTIVE MULTIPLE ANTENNA TRANSMISSION METHOD AND APPARATUS IN ACCORDANCE WITH ANTENNA TRANSMISSION POWER IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and an adaptive multiple antenna transmission method and apparatus in accordance with antenna transmission power are disclosed. A method of performing multiple antenna transmission from a terminal to a base station according to one embodiment of the present invention may include the steps of: determining a reference value for a transmission power of each of a plurality of transmit antennas of the terminal; grouping the plurality of transmit antennas into a first group of transmit antennas and a second group of transmit antennas in accordance with the determined reference value; and transmitting a signal to the base station through at least one of the first group of the transmit antennas and the second group of transmit antennas. | 05-24-2012 |
20120134334 | METHOD AND APPARATUS FOR TRANSMITTING DOWNLINK REFERENCE SIGNAL IN WIRELESS COMMUNICATION SYSTEM THAT SUPPORTS MULTIPLE ANTENNAS - A method for transmitting a reference signal for a maximum of eight antenna ports includes mapping a portion of common reference signals (CRSs) for a maximum of four antenna ports into a downlink subframe that includes a 1 | 05-31-2012 |
20120134338 | METHOD AND APPARATUS FOR TRANSMITTING/RECEIVING A SIGNAL IN A WIRELESS COMMUNICATION SYSTEM THAT SUPPORTS MULTI-USER MIMO TRANSMISSION - The present invention relates to a wireless communication system, and discloses a method and apparatus for transmitting/receiving a signal in a wireless communication system that supports multi-user MIMO transmission. According to one embodiment of the present invention, a method in which a mobile station receives a signal in a wireless communication system that supports multi-user MIMO transmission, comprises: a step of receiving information on the entirety of the transmission rank of the multi-user MIMO transmission; a step of receiving a reference signal and data for demodulation for the mobile station on the basis of the information on the entirety of the transmission rank; a step of acquiring channel information on the mobile station from the reference signal for demodulation; and a step of demodulating said data on the basis of the acquired channel information. | 05-31-2012 |
20120140698 | METHOD AND APPARATUS FOR TRANSMITTING CONTROL SIGNAL OF RELAY STATION IN WIRELESS COMMUNICATION SYSTEM - A method and an apparatus for transmitting a control signal of a relay station in a wireless communication system are provided. The relay station generates a control signal of uplink control information and performs mapping of the generated modulation symbol into a backhaul subframe that has a relay physical uplink control channel (R-PUCCH) assigned thereto. The backhaul subframe includes two slots among. Among single carrier frequency division multiple access (SC-FDMA) symbols that constitute the backhaul subframe, an orthogonal cover (OC) sequence is applied to the SC-FDMA symbol which the modulation symbol has been mapped into, and later the backhaul subframe is transmitted. The generated modulation symbol is mapped according to the same pattern as the two slots. | 06-07-2012 |
20120140726 | RELAY BACKHAUL RESOURCE ALLOCATION - The present invention relates to a method for allocating a relay backhaul resource in a wireless communication system and to an apparatus for same. In detail, the present invention provides a signal-receiving method in which a terminal receives a signal in a wireless communication system, and to an apparatus for same, wherein the method comprises a step of receiving, from a base station, information on one or more first resource blocks (RB) allocated for a relay, a step of receiving resource allocation information through a control channel from the base station, and a step of receiving a predetermined resource block indicated by the resource allocation information among logically continuous second resource blocks. The second resource blocks are logically continuous when excluding said one or more first resource blocks from the entirety of the resource block. | 06-07-2012 |
20120147794 | CHANNEL STATUS INFORMATION FEEDBACK METHOD AND APPARATUS IN WIRELESS COMMUNICATION SYSTEM WITH RELAY STATION - The present invention relates to a wireless communication system, and more particularly, to a channel status information feedback method and apparatus in a wireless communication system with a relay station. The method for transmitting channel status information according to one embodiment of the present invention comprises: receiving a backhaul downlink signal from a base station; generating channel status information based on the backhaul downlink signal; and transmitting the channel status information via a backhaul uplink subframe, wherein the backhaul uplink subframe to which the channel status information is transmitted can be determined based on a subframe index without a designated backhaul downlink subframe and a backhaul uplink transmission timing relation. | 06-14-2012 |
20120155312 | Measurement Reporting Method And Device In A Wireless Communication System - Provided are a measurement reporting method and device in a wireless communications system. A mobile station receives data relating to a measurement set for K (M≦N) component carriers to be measured from among N component carriers, from a base station. The mobile station measures the K component carriers. The mobile station then reports the results of the measurement of the K component carriers to the base station. | 06-21-2012 |
20120155338 | METHOD AND APPARATUS FOR TRANSMITTING REFERENCE SIGNAL IN TIME DIVISION DUPLEX SYSTEM - A method and apparatus of transmitting a reference signal in a time division duplex (TDD) system is provided. A base station (BS) generates a plurality of demodulation reference signals (DMRSs) for respective layers, maps the plurality of DMRSs to a downlink pilot time slot (DwPTS) region for downlink transmission within a special subframe; and transmits the plurality of DMRSs through a plurality of antennas. The special subframe is a subframe for separating uplink and downlink between an uplink (UL) subframe and a downlink (DL) subframe within a frame. | 06-21-2012 |
20120163335 | METHOD AND APPARATUS FOR TRANSMITTING MULTI-USER MIMO REFERENCE SIGNAL IN WIRELESS COMMUNICATION SYSTEM FOR SUPPORTING RELAY - A method for transmitting a demodulation reference signal (DMRS) for down-link multi-user MIMO transmission according to an embodiment of the present invention comprises the steps of: mapping a DMRS for a first layer on a down-link physical resource block according to a first DMRS pattern; mapping a DMRS for a second layer on the down-link physical resource block according to a second DMRS pattern; and transmitting the down-link physical resource block. In the down-link physical resource block, a resource element corresponding to the second DMRS pattern can be punctured on the first layer and a resource element corresponding to the first DMRS pattern can be punctured on the first layer and a resource element corresponding to the first DMRS pattern can be punctured on the second layer. | 06-28-2012 |
20120178360 | REPEATER FOR RECEIVING SIGNALS FROM A BASE STATION IN A WIRELESS COMMUNICATION SYSTEM, AND SIGNAL RECEIVING METHOD - Disclosed are a repeater for receiving signals from a base station in a wireless communication system, and a signal receiving method. The base station reports, to each repeater, information on the aggregation level of a relay-control channel element (R-CCE) of a relay-physical downlink control channel (R-PDCCH) via an explicit signaling method or implicit signaling method. In the event the base station reports via an explicit signaling method, the repeater receives, from the base station, information on the aggregation level of R-CCE which is a transmission unit of R-PDCCH, wherein the information contains control information for the repeater. Then, the repeater decodes an R-PDCCH region on an R-CCE aggregation level basis in accordance with the received R-CCE aggregation level information. | 07-12-2012 |
20120182950 | METHOD AND APPARATUS FOR TRANSCEIVING SCHEDULING SIGNALS IN A MULTI-CARRIER WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method for transceiving scheduling signals in a multi-carrier wireless communication system, comprising a step of transmitting, via a predetermined downlink component carrier, a PDSCH transmission scheduling signal on one or more downlink component carriers and/or a PUSCH transmission scheduling signal on one or more uplink component carriers; and a step of transceiving the PDSCH and/or the PUSCH in accordance with the scheduling signals. The scheduling signals can be defined to the same size in a PDCCH transmission region of said predetermined downlink component carrier in the event different MIMO transmission modes are applied to the PDSCH transmission or the PUSCH transmission, or in the event said one or more downlink component carriers or said one or more uplink component carriers have different bandwidths. | 07-19-2012 |
20120182957 | METHOD FOR TRANSMITTING A SOUNDING REFERENCE SIGNAL IN A WIRELESS COMMUNICATION SYSTEM, AND APPARATUS FOR SAME - The present invention relates to a method in which user equipment transmits a non-periodic sounding reference signal in a wireless communication system. In detail, the method comprises: a step of receiving a downlink control channel from a base station; a step of checking carrier indication field (CIF) information of a downlink control information (DCI) format contained in the downlink control channel; and a step of transmitting a non-periodic sounding reference signal to the base station in accordance with the CIF information, wherein said CIF information comprises a triggering message of the non-period sounding reference signal. | 07-19-2012 |
20120182959 | METHOD AND APPARATUS FOR TRANSCEIVING DATA IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method and apparatus for transceiving data in a wireless communication system. A method for receiving data in a wireless communication system according to one aspect of the present invention is configured such that a base station receives, from a mobile station, a signal including information and data on the transmission mode which the mobile station has selected in accordance with a channel status, and decodes the data in accordance with the transmission mode. | 07-19-2012 |
20120188959 | METHOD AND DEVICE FOR SENDING AND RECEIVING CONTROL DATA ON A WIRELESS COMMUNICATIONS SYSTEM - The present invention relates to a method and device for sending and receiving control data on a wireless communications system employing an aggregated carrier arrangement. In a method for transmitting control data on a wireless communications system supporting carrier aggregation according to one aspect of the present invention, a base station transmits, to a mobile station, information relating to physical cell ID (physical cell identification, hereinafter “PCI”) for use in uplink signal transmission, and receives an uplink signal generated from the mobile station using the PCI. | 07-26-2012 |
20120188988 | METHOD AND APPARATUS FOR PROVIDING DOWNLINK REFERENCE SIGNAL TRANSMISSION POWER INFORMATION IN A WIRELESS COMMUNICATION SYSTEM THAT SUPPORTS MULTIPLE ANTENNAS - The present invention relates to a wireless communication system, and more particularly, to a method and an apparatus for providing downlink reference signal transmission power information in a wireless communication system that supports multiple antennas. A method for providing demodulation reference signal transmission power information according to one embodiment of the present invention comprises: a step of mapping a main synchronous signal onto a predetermined OFDM symbol of a downlink pilot time slot (DwPTS) subframe; a step of mapping, in a code division multiplexing manner, a demodulation reference signal over two or more OFDM symbols containing said predetermined OFDM symbol in the DwPTS subframe; a step of transmitting the DwPTS subframe to which the main synchronous signal and the demodulation reference signal are mapped; and a step of transmitting information on the transmission power for transmitting the demodulation reference signal mapped onto said predetermined OFDM symbol. | 07-26-2012 |
20120195285 | TRANSMISSION METHOD AND DEVICE FOR A DOWNLINK REFERENCE SIGNAL - The present invention relates a method in which a base station transmits a downlink signal by using a plurality of layers comprises the steps of: multiplexing and transmitting dedicated reference signals for the plurality of layers on the basis of a reference signal pattern, wherein 24 resource element positions comprised in the reference signal pattern are set as 6 groups, the 6 groups are set as 2 high-level groups, the reference signal for the plurality of layer is split and placed in the 2 high-level groups, and the reference signal for 2 or more layers placed in the same group is subjected to code-division multiplexing. | 08-02-2012 |
20120201187 | METHOD FOR TRANSCEIVING A DOWNLINK REFERENCE SIGNAL, AND BASE STATION AND USER EQUIPMENT USING SAME - The present invention relates to a wireless communication system. In detail, the present invention relates to a technique for transmitting a downlink reference signal in a wireless communication system in which one base station simultaneously transmits signals to a plurality of user equipment, and a control signal containing information on the allocation of a reference signal of specific user equipment and layer information for specifying the transport layer of the specific user equipment is transmitted to the specific user equipment, wherein the information on the allocation of the reference signal contains information for indicating whether or not a reference signal pattern, other than the reference signal pattern in which the reference signal of the specific user equipment is multiplexed, is transmitted in a predetermined resource region. | 08-09-2012 |
20120202541 | METHOD FOR TRANSMITTING FEEDBACK INFORMATION IN CoMP, TERMINAL FOR PERFORMING SAME, METHOD FOR GENERATING CHANNEL STATE INFORMATION AND BASE STATION APPARATUS FOR PERFORMING SAME - Disclosed are a method for estimating a channel state in a CoMP operation of a terminal and a method for generating channel state information of a base station. A terminal can measure strength or an interference level of a signal of each cell using a reference signal received from each cell for performing the CoMP operation. In addition, the terminal can measure the sum of the interference levels of the cells which do not perform the CoMP operation using a region from which a reference signal of a serving cell of each cell is transmitted. In addition, the terminal can transmit to the serving base station the strength of the interference level of the signal of each cell for performing the measured CoMP operation and the sum of the interference levels of the cells which do not perform the CoMP operation. | 08-09-2012 |
20120207055 | METHOD AND APPARATUS FOR TRANSMITTING FEEDBACK INFORMATION TO TERMINAL IN WIRELESS COMMUNICATION SYSTEM USING CoMP TRANSMISSION - The present invention relates to a wireless communication system having at least one base station utilizing CoMP (Coordinated Multi-Point) transmission, wherein a terminal receives a reference signal from said at least one base station. If said at least one base station makes a transmission based on said reference signal through Coordinated beamforming (CB), information based on PMI (Precoding Matrix Index) corresponding to each base station is determined. Accordingly, if said at least one base station makes a transmission based on joint processing, phase set information is determined for phase correction of the formed beam. Thus, the present method transmits feedback information, comprising PMI set information based on CB and said phase set information, from said at least one base station to a server base station. | 08-16-2012 |
20120208583 | METHOD AND APPARATUS FOR CONTROLLING UPLINK TRANSMISSION POWER IN A MULTI-CARRIER WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method for controlling uplink transmission power in a multi-carrier wireless communication system comprising: receiving, from a base station, downlink control information containing an uplink transmission power control command, and one or more pieces of uplink carrier indicator information for indicating an uplink carrier to which the uplink transmission power control command is to be applied; determining an uplink carrier, to which the uplink transmission power control command is to be applied, on the basis of said one or more pieces of uplink carrier indicator information; determining a transmission power for the determined uplink carrier one the basis of the downlink control information; and transmitting, to the base station, an uplink signal on the determined uplink carrier on the basis of the determined transmission power. | 08-16-2012 |
20120213147 | REFERENCE SIGNAL TRANSMISSION METHOD AND APPARATUS IN WIRELESS COMMUNICATION SYSTEM INCLUDING RELAY STATION - The present invention provides a reference signal transmission method and apparatus by a base station in a wireless communication system including a relay station. The base station generates a plurality of relay-physical downlink control channel (R-PDCCH) reference signals for the demodulation of an R-PDCCH which is a control channel for the relay station relative to each of a plurality of layers, maps the plurality of R-PDCCH reference signals with R-PDCCH regions included in a relay zone within at least one resource block according to a predetermined reference signal pattern, and transmits at least one resource block through a plurality of antenna ports. | 08-23-2012 |
20120213193 | METHOD OF TRANSMITTING SCHEDULING REQUEST IN A WIRELESS COMMUNICATION SYSTEM - A method and apparatus for requesting uplink resources in a wireless communication system is provided. A user equipment determines whether a scheduling request for requesting uplink resources is triggered. If the scheduling request is triggered, the user equipment transmits a first set of frequency domain sequences and a second set of frequency domain sequences in a subframe. | 08-23-2012 |
20120213196 | METHOD AND APPARATUS FOR EFFICIENT CONTENTION-BASED TRANSMISSION IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more particularly to a method and apparatus for efficient contention-based transmission in a wireless communication system. The method for performing contention-based transmission in a wireless communication system according to one embodiment of the present invention comprises: setting a radio resource control (RRC) connection with a receiver end where the contention-based transmission is received; setting a resource area for the contention-based transmission to allow a collision with other transmission; and transmitting at least one of the data and control information on the resource area, wherein the resource area for the contention-based transmission can be hopped on a physical resource. | 08-23-2012 |
20120218882 | EFFICIENT CONTROL INFORMATION TRANSMISSION METHOD AND APPARATUS FOR SUPPORTING MULTIPLE ANTENNA TRANSMISSION TECHNIQUE - The present invention relates to a wireless communication system, and provides an efficient control information transmission method and apparatus for supporting a multiple antenna transmission technique. According to one embodiment of the present invention, a method for transmitting downlink hybrid automatic repeat request (HARQ) information on a uplink multiple codeword transmission comprises the steps of: receiving the uplink multiple codeword transmission; generating HARQ information on each of multiple codewords, on the basis of the result of decoding each of the multiple codewords; modulating the HARQ information; and transmitting the modulated HARQ information through one or more physical HARQ indicator channels (PHICHs). | 08-30-2012 |
20120218952 | TRANSMISSION METHOD OF DOWNLINK SIGNAL IN WIRELESS COMMUNICATION SYSTEM AND TRANSMISSION APPARATUS THEREFOR - The present invention provides a method for a base station to transmit a downlink signal in a wireless communication system, the method comprising: allocating a resource to a downlink signal; and transmitting the downlink signal using the allocated resource. In the downlink signal transmission method and apparatus thereof, a resource for transmitting a Physical Downlink Shared Channel (PDSCH) among the downlink signals is allocated from a specific OFDM symbol that is fixed within a subframe. | 08-30-2012 |
20120218964 | RELAY NODE DEVICE FOR RECEIVING CONTROL INFORMATION FROM A BASE STATION AND METHOD THEREFOR - The present invention relates to a relay node device for receiving control information from a base station and a method therefor. The relay node device according to the present invention comprises: a receiver, which receives information about an area where a relay-physical downlink control channel (R-PDCCH), the channel for transmitting control information for the relay node from a base station, is allocated; a processor, which searches for at least one R-PDCCH for the relay node based on the R-PDCCH allocation information received; and an R-PDCCH receiver, which receives the at least one R-PDCCH from the fourth symbol of the first slot in a downlink backhaul subframe of the area where the at least one R-PDCCH searched for by the processor has been allocated. | 08-30-2012 |
20120220327 | METHOD AND A BASE STATION FOR TRANSMITTING A CSI-RS, AND A METHOD AND USER EQUIPMENT FOR RECEIVING THE CSI-RS - A base station in a wireless communication system transmits a CSI-RS of a cell every 1×N subframes or 1×N ms with muting CSI-RS REs of a neighboring cell every m×N subframes. A BS can estimate channel state of the neighboring cell with higher accuracy by using a CSI-RS of the neighboring cell received in the muted REs. | 08-30-2012 |
20120224535 | TERMINAL DEVICE FOR TRANSMITTING A POWER HEADROOM REPORT IN A MULTI-CARRIER COMMUNICATION SYSTEM, AND METHOD FOR SAME - Disclosed is a terminal device for transmitting a power headroom report (PHR) in a multi-carrier communication system, and a method for same. The terminal device for transmitting a power headroom report (PHR) in a multi-carrier communication system comprises a transmitter and a processor. The transmitter transmits, to a base station, a power headroom report for one or more active component carriers allocated to user equipment from among multiple carriers. The processor controls the transmitter such that the transmitter transmits the power headroom report including a first type of power headroom information calculated using the power value of a physical uplink shared channel (PUSCH) of the main component carrier among the active component carriers, and a second type of power headroom information calculated using the power value of the PUSCH and the power value of a physical uplink control channel (PUCCH) of the main component carrier. | 09-06-2012 |
20120224553 | APPARATUS AND METHOD FOR TRANSCEIVING UPLINK TRANSMISSION POWER CONTROL INFORMATION IN A MULTI-CARRIER COMMUNICATION SYSTEM - Disclosed are an apparatus and method for transceiving uplink transmission power control information in a multi-carrier communication system. As an LTE-A system employs multiple carriers, overhead may increase since a base station performs signaling in consideration of a carrier index, a TPC command index, etc. However, according to various embodiments of the present invention, overhead for signaling a TPC command and the like can be significantly reduced. | 09-06-2012 |
20120224555 | METHOD AND A BASE STATION FOR CONTROLLING DOWNLINK TRANSMISSION POWER, AND A METHOD AND A USER EQUIPMENT FOR RECEIVING A PDSCH - A ratio of data transmission power of a layer per RE to RS transmission power of the layer per RE is predefined according to rank. A BS determines downlink transmission power for a PDSCH according to the predefined rank and a UE assumes that the PDSCH and UE-specific RS(s) for the PDSCH is transmitted with power satisfying the ratio. | 09-06-2012 |
20120224557 | APERIODIC TRANSMISSION METHOD AND APPARATUS FOR SOUNDING REFERENCE SIGNAL IN WIRELESS COMMUNICATION SYSTEM - Provided are a method and an apparatus for an aperiodic transmission of a sounding reference signal (SRS), which is performed by a user equipment (UE), in a wireless communication system. The UE aperiodically transmits an SRS through a certain uplink (UL) component carrier (CC) of a plurality of UL CCs. The determination of the certain UL CC is based on a downlink (DL) grant, wherein the downlink grant contains a message that triggers the aperiodic transmission of the SRS. | 09-06-2012 |
20120230239 | TERMINAL DEVICE FOR RECEIVING SIGNAL IN WIRELESS COMMUNICATION SYSTEM FOR SUPPORTING A PLURALITY OF COMPONENT CARRIERS AND METHOD THEREOF - Disclosed are a terminal device for receiving a signal in a wireless communication system for supporting a plurality of component carriers and a method thereof. In the terminal device for receiving the signal in the system for supporting the component carriers, a receiver receives a Physical Downlink Control Channel (PDCCH) including control information of a first type component carrier from a base station or a relay. A processor performs a decoding operation or controls an operation in a slip mode on the basis of control information included in a PDCCH in a second type component carrier after a time corresponding to a particular time offset value passes from a transmission time point of the PDCCH. | 09-13-2012 |
20120230291 | METHOD AND APPARATUS FOR TRANSMITTING AN UPLINK OR DOWNLINK GRANT IN A WIRELESS COMMUNICATION SYSTEM THAT SUPPORTS UPLINK AND DOWNLINK MIMO SCHEMES - The present invention relates to a method for transmitting an uplink or downlink grant in a wireless communication system that supports uplink and downlink multiple input multiple output (MIMO) schemes. The method comprises: determining a downlink control information (DCI) format for an uplink or downlink grant to generate control information: attaching a cyclic redundancy check (CRC) for detecting an error in the created control information; and channel-coding the CRC-attached control information, wherein the control information comprises a bit flag for distinguishing whether the grant is an uplink grant or a downlink grant. | 09-13-2012 |
20120236816 | METHOD AND APPARATUS FOR TRANSCEIVING DATA VIA A CONTENTION-BASED PHYSICAL UPLINK DATA CHANNEL - Disclosed are a method and apparatus for transceiving data via a contention based physical uplink data channel. A terminal apparatus, which transmits data via a contention based physical uplink data channel, comprises: a transmitter which transmits data via a contention based physical uplink data channel and scheduling request information via a scheduling request channel simultaneously or consecutively to a base station; a receiver which receives a physical hybrid-ARQ indicator channel (PHICH) or an uplink (UL) grant message from the base station; and a processor which decodes the physical hybrid-ARQ indicator channel (PHICH) or the uplink (UL) grant message to determine whether an ACK signal or a NACK signal is indicated. Here, the scheduling request channel can be a specific channel allocated to the terminal apparatus so as to discriminate the terminal from other terminal apparatuses. | 09-20-2012 |
20120240009 | METHOD AND APPARATUS FOR TRANSMITTING UPLINK DATA IN A WIRELESS ACCESS SYSTEM - A method of transmitting data in a wireless access system includes: calculating a number C of code blocks using a size B of an input bit sequence, a maximum size Z of the code blocks, and a size L of a cyclic redundancy check (CRC) which is to be attached to each of the code blocks; calculating a size B′ of a modified input bit sequence using the number C, the size L, and the size B; obtaining a size K of each of the code blocks using the size B′ and the number C; segmenting the input bit sequence to have the number C of the code blocks and the obtained size K of each of the code blocks; generating the code blocks by attaching the CRC to each of the segmented input bit sequences; and channel-coding the code blocks. | 09-20-2012 |
20120243498 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING A SIGNAL IN A WIRELESS COMMUNICATION SYSTEM THAT SUPPORTS PLURAL COMPONENT CARRIERS - The present invention relates to a method for receiving a terminal signal in a wireless communication system that supports plural component carriers, the method comprising: receiving a subframe including a plurality of OFDM symbols from a base station (BS); and receiving identification information indicative of a particular component carrier, from one or more consecutive OFDM symbols located at the front of the subframe, wherein the identification information indicative of the particular component carrier includes a carrier offset value with respect to a reference component carrier. | 09-27-2012 |
20120243499 | METHOD FOR TRANSMITTING CONTROL INFORMATION IN A CARRIER AGGREGATION SYSTEM, RECEIVING METHOD, AND TERMINAL - A method of transmitting control information in a carrier aggregation system is provided. The method includes: transmitting bandwidth information of a component carrier; configuring downlink control information including an additional indication field and an information field; mapping the downlink control information in any one of containing units having a plurality of predetermined different bit sizes in accordance with the bandwidth information; and transmitting the downlink control information mapped to any one of the containing units, wherein the information field is any one of a plurality of control information formats applicable to the component carrier, and the additional indication field includes information indicating a specific control information format to which the information field corresponds among the plurality of control information formats. Accordingly, the number of blind decoding attempts of a user equipment can decrease in a carrier aggregation system. Therefore, power consumption of the user equipment can decrease, and a decoding rate can increase. | 09-27-2012 |
20120250558 | METHOD AND APPARATUS FOR EFFICIENTLY MEASURING A CHANNEL IN A MULTI-CARRIER WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more particularly, to a method and an apparatus for efficiently measuring a channel in a multi-carrier wireless communication system. According to one embodiment of the present invention, a method in which a downlink receiving entity provides downlink channel measurement information for establishing component carriers in a multi-carrier wireless system, comprise the following steps: receiving, from a downlink transmitting entity, information on one or more downlink component carriers for which channel measurement for establishing CCs is to be performed; performing downlink channel measurement for one or more DL CCs; and reporting the result of the downlink channel measurement to the downlink transmitting entity, wherein said one or more downlink component carriers for which channel measurement is to be performed may contain a component carrier which is not allocated to the downlink receiving entity. | 10-04-2012 |
20120250655 | METHOD AND APPARATUS FOR TRANSMITTING A REFERENCE SIGNAL IN A MULTI-ANTENNA SYSTEM - Provided are a method and apparatus for transmitting a reference signal in a multi-antenna system. A terminal generates a plurality of reference signal sequences in which cyclic shift values different from each other are allocated to the respective plurality of layers, and generates a single carrier-frequency division multiple access (SC-FDMA) symbol to which the plurality of reference signal sequences are mapped. The SC-FDMA symbol is transmitted to a base station via a plurality of antennas. The cyclic shift values allocated to the respective layers are determined on the basis of a first cyclic shift value, which is a cyclic shift value allocated to a first layer from among the plurality of layers, and cyclic shift offsets which are allocated to the respective layers and which are different from each other. | 10-04-2012 |
20120250656 | METHOD AND APPARATUS FOR TRANSMITTING A REFERENCE SIGNAL IN A MULTI-ANTENNA SYSTEM - Provided are a method and apparatus for transmitting a reference signal in a multi-antenna system. A terminal generates a plurality of reference signal sequences in which cyclic shift values that are different from each other are allocated to the respective plurality of layers, and generates an orthogonal frequency division multiplexing (SC-FDMA) symbol to which the plurality of reference signal sequences are mapped. The SC-FDMA symbol is transmitted to a base station via a plurality of antennas. Each of the reference signal sequences is multiplied by either +1 or −1 in accordance with an orthogonal covering code (OCC) index corresponding to the cyclic shift field in a DCI format transmitted via a physical downlink control channel (PDCCH) for each layer. | 10-04-2012 |
20120257531 | METHOD AND APPARATUS FOR TRANSMITTING CHANNEL STATUS INFORMATION EFFICIENTLY IN A MULTI-CARRIER WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method for transmitting channel status information in a multi-carrier wireless communication system, according to one embodiment of the present invention, may include: receiving, at a receiving terminal, signals transmitted on N (N≧2) number of carriers from a transmitting terminal to the receiving terminal; determining, at the receiving terminal, channel status information for each of the N number of carriers from the received signals; and transmitting the channel status information for each of the N number of carriers on M (1≦M≦N) number of carriers from the receiving terminal to the transmitting terminal. The channel status information for each of the N number of carriers may be transmitted according to a channel status information reporting period for each of the N number of carriers and a channel status information reporting period offset. | 10-11-2012 |
20120257553 | METHOD AND APPARATUS FOR TRANSMITTING REFERENCE SIGNAL IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method and an apparatus for transmitting a reference signal by a base station in a wireless communication system. The base station generates a channel state information (CSI) reference signal (RS) for each of a plurality of layers, performs mapping the plurality of CSI-RSs to a resource element set constituted by a plurality of resource elements(REs) in a subframe and transmits the subframe with the plurality of mapped CSI-RSs. The plurality of resource elements constituting the resource element set are resource elements that are arranged with constant subcarrier spacing in two neighboring orthogonal frequency division multiplexing (OFDM) symbols, and the subframe has an extended cyclic prefix (CP) structure including 12 OFDM symbols. | 10-11-2012 |
20120263129 | APERIODIC TRANSMISSION METHOD AND APPARATUS FOR SOUNDING REFERENCE SIGNAL IN WIRELESS COMMUNICATION SYSTEM - Provided are a method and an apparatus for an aperiodic transmission of a sounding reference signal (SRS), which is performed by a user equipment (UE), in a wireless communication system. The UE aperiodically transmits an SRS through a certain uplink (UL) component carrier (CC) of a plurality of UL CCs. The certain UL CC is identical to the UL CC that transmits a physical uplink shared channel (PUSCH), which is scheduled by an uplink grant, wherein the uplink grant contains a message that triggers the aperiodic transmission of an SRS. | 10-18-2012 |
20120269113 | APPARATUS FOR TRANSMITTING AND RECEIVING UPLINK BACKHAUL SIGNAL IN WIRELESS COMMUNICATION SYSTEM AND METHOD THEREOF - Disclosed are an apparatus for transmitting and receiving an uplink backhaul signal in a wireless communication system and a method thereof. The method for receiving the uplink backhaul signal from a relay station in a base station, comprises the step of receiving a signal transmitted through an uplink backhaul sub-frame of an index N in the relay station using an uplink sub-frame of an index N or an index N+1 in the base station. The base station receives the signal transmitted from the relay station in the uplink sub-frame of the index N or the index N+1 of the base station at the delayed timing corresponding to a propagation delay value of the signal according to the distance between the relay station and the base station from a transmitting time point. | 10-25-2012 |
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 |
20120269138 | METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method for transmitting a signal via physical uplink control channel (PUCCH) in a wireless communication system, and to an apparatus for the method, wherein the method is configured such that a terminal transmits a signal via the PUCCH and multiple antennas, and comprises the following steps: obtaining a first modulated symbol sequence from control information; performing a spreading process on modulated symbols corresponding to each of the slots in the PUCCH from among the first modulated symbol sequence, such that the modulated symbols corresponding to the respective single carrier frequency division multiplexing (SC-FDMA) symbols in the relevant slot, so as to obtain a plurality of spread second modulated symbol sequences corresponding to the respective SC-FDMA symbols in each slot; and transmitting, in the relevant SC-FDMA symbols in the PUCCH, the plurality of spread second modulated symbol sequences via multiple antennas, wherein resources used in the transmission via the PUCCH are orthogonal to one another between antenna ports. | 10-25-2012 |
20120269151 | DOWNLINK CONTROL INFORMATION TRANSMITTING METHOD AND BASE STATION, AND DOWNLINK CONTROL INFORMATION RECEIVING METHOD AND USER DEVICE - In the transmission of user data for a user equipment and control information on the user data to the user equipment using a plurality of carrier waves by a base station in a wireless communication system, the control information can be transmitted over a portion of the plurality of carrier waves, and carrier waves over which only the user data is transmitted can be generated without the control information. Here, the base station transmits, at a certain number of subframes following the subframes at which the control information is transmitted, the user data over the carrier waves to which only the user data is allocated. Thus, the user equipment can minimize the buffering of the user data during the detection of the control information, and decode the user data. | 10-25-2012 |
20120281625 | METHOD FOR TRANSMITTING A SOUNDING REFERENCE SIGNAL IN A WIRELESS COMMUNICATION SYSTEM, AND APPARATUS FOR SAME - The present invention relates to a method in which user equipment transmits a non-periodic sounding reference signal in a wireless communication system. In detail, the method comprises: a step of receiving a downlink control channel from a base station; a step of decoding a downlink control information (DCI) format contained in the downlink control channel; a step of checking a non-periodic sounding reference signal transmission instruction in the DCI format; and a step of transmitting a non-periodic sounding reference signal to the base station in accordance with the transmission instruction. Preferably, if the downlink control channel is received via an n | 11-08-2012 |
20120287878 | CROSS-CARRIER SCHEDULING METHOD OF UPLINK IN CARRIER AGGREGATION SYSTEM, AND TERMINAL - An uplink cross-carrier scheduling method in a carrier aggregation system is provided. The method includes: receiving information for an uplink component carrier (UL CC) monitoring set from a base station; receiving control information through a downlink component carrier (DL CC) determined on the basis of the information for the UL CC monitoring set; and transmitting an uplink signal to the base station on the basis of the control information. | 11-15-2012 |
20120294252 | METHOD FOR TRANSMITTING CONTROL INFORMATION IN A WIRELESS COMMUNICATION SYSTEM USING MULTIPLE CARRIERS - The present invention relates to a method in which a terminal transmits uplink control information in a wireless communication system using multiple carriers. The method comprises the following steps: receiving, from a base station, indication information that indicates whether or not to use multiple uplink control resources; determining a first uplink control resource on the basis of a specific control channel element (CCE) index of the CCE received from the base station; and, if the indication information indicates to use multiple uplink control resources, applying a predetermined rule to the specific CCE index to determine a second uplink control resource. | 11-22-2012 |
20120294268 | METHOD AND APPARATUS FOR TRANSMITTING UPLINK CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM - A method and apparatus for transmitting uplink control information in a wireless communication system is disclosed. A method for transmitting uplink control information in a mobile station of a wireless communication system includes performing reverse repetition coding with respect to first uplink control information, and performing joint coding with respect to the reverse repetition coded first uplink control information and second uplink control information. The first uplink control information has higher priority than the second uplink control information. | 11-22-2012 |
20120294272 | METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method for transmitting acknowledgement/negative ACK (ACK/NACK) in a wireless communication system which supports carrier aggregation, and to an apparatus for the method. A method in which a terminal transmits ACK/NACK in a wireless communication system that supports carrier aggregation comprises the following steps: receiving one or more physical downlink shared channels (PDSCHs); and transmitting ACK/NACK for said one or more PDSCHs via a physical uplink control channel (PUCCH). A PUCCH format for transmitting ACK/NACK is selected by taking the type of the carrier in which said one or more PDSCHs are received into account. | 11-22-2012 |
20120300726 | METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system. More specifically, the present invention relates to a method for transmitting control signal via a PUCCH in a wireless communication system, and to an apparatus for the method, wherein the method comprises the following steps: joint-coding a plurality of pieces of control information to obtain a single codeword; obtaining a first modulation symbol sequence from the single codeword; obtaining, from the first modulation symbol sequence, a plurality of second modulation symbol sequences corresponding to each slot in the PUCCH; cyclically shifting the plurality of second modulation symbol sequences in a time domain to obtain a plurality of third modulation symbol sequences; performing a discrete Fourier transform (DFT) precoding process on the plurality of third modulation symbol sequences to obtain a plurality of complex symbol sequences in a frequency domain; and transmitting the plurality of complex symbol sequences via the PUCCH. | 11-29-2012 |
20120300728 | METHOD AND BASE STATION FOR TRANSMITTING DOWNSTREAM LINK DATA, AND METHOD AND USER DEVICE FOR RECEIVING DOWNSTREAM LINK DATA - The present invention relates to a method and apparatus which transmit/receive at least one demodulation reference signal by using a CDM group and/or a transmission rank of a user device that have been used to transmit the at least one demodulation reference signal for the user device, an OCC that has been used to spread the demodulation reference signal, etc. Also, the present invention relates to a method and apparatus which change an antenna port for transmitting the demodulation reference signal by using NDI for a disabled transmission block. | 11-29-2012 |
20120300741 | METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method for transmitting acknowledgement/negative ACK (ACK/NACK) in a wireless communication system which supports carrier aggregation, and to an apparatus for the method. A method in which a terminal transmits ACK/NACK in a wireless communication system that supports carrier aggregation comprises the following steps: receiving a physical downlink control channel (PDCCH); receiving a physical downlink shared channel (PDSCH) indicated by the PDCCH; and transmitting ACK/NACK for the PDSCH via a physical uplink control channel (PUCCH). A PUCCH format for transmitting ACK/NACK is selected by taking the number of aggregated carriers into account. | 11-29-2012 |
20120307758 | APPARATUS AND METHOD FOR PERFORMING AN UPLINK HARQ IN A WIRELESS COMMUNICATION SYSTEM - Provided are an apparatus and method of performing an uplink hybrid automatic repeat request (HARQ) in a wireless communication system. A terminal transmits a transport block to a base station via a physical uplink shared channel (PUSCH) using uplink resource allocation and receives an ACK/NACK signal for the transport block from the base station via a physical hybrid-ARQ indicator channel (PHICH). A PHICH resource used for transmitting the PHICH is identified from a PUSCH resource used for transmitting the PUSCH, and the PUSCH resource is mapped to the PHICH resource according to an uplink element carrier through which the transport block is transmitted. | 12-06-2012 |
20120307760 | METHOD AND APPARATUS FOR TRANSMITTING UPLINK CONTROL INFORMATION IN A WIRELESS COMMUNICATION SYSTEM - The present invention provides a method and apparatus for transmitting uplink control information (UCI) by user equipment in a wireless communication. The user equipment performs channel coding on information bits of the UCI to generate encoding information bits; performs modulation on the thus generated encoding information bits to generate complex modulation symbols; spreads the complex modulation symbols block-wise to a plurality of single carrier-frequency division multiple access (SC-FDMA) symbols based on an orthogonal sequence; and transmits the spread complex modulation symbols to a base station. | 12-06-2012 |
20120307775 | METHOD AND APPARATUS FOR PERFORMING A HYBRID AUTOMATIC REPEAT REQUEST PROCESS FOR AN UPLINK MULTI-CODEWORD TRANSMISSION IN A WIRELESS COMMUNICATION SYSTEM WHICH SUPPORTS A MULTI-ANTENNA TRANSMISSION - The present invention relates to a wireless communication system, and more particularly, to a method and apparatus for performing a hybrid automatic repeat request process for an uplink multi-codeword transmission in a wireless communication system which supports a multi-antenna transmission. The uplink multi-codeword transmission method according to one embodiment comprises the following steps: transmitting first and second codewords, transmitting information on the status of transmission buffer for the first and second codewords, receiving downlink control information (DCI) containing acknowledgement (ACK)/negative acknowledgement (NACK) information on each of the first and second codewords, and re-transmitting the codeword for NACK information, wherein the codeword for NACK information, wherein the codeword for ACK information is not transmitted to a base station in cases where the transmission buffer is empty. | 12-06-2012 |
20120307779 | 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 data using a first physical uplink shared channel (PUSCH) 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 single carrier-frequency division multiple access (SRS SC-FDMA) symbol, which is reserved for transmitting SRS. | 12-06-2012 |
20120314671 | DATA TRANSMISSION METHOD AND DEVICE IN WIRELESS COMMUNICATION SYSTEM - A data transmission method and device are provided in a wireless communication system with user equipment (UE). A UE transmits uplink data through sounding reference signals (SRS) and a physical uplink shared channel (PUSCH) in a SRS subframe. A single carrier-frequency division multiple access (SC-FDMA) symbol allocated to said SRS and the | 12-13-2012 |
20120314676 | METHOD FOR TRANSMITTING CHANNEL QUALITY INFORMATION, USER EQUIPMENT, METHOD FOR TRANSMITTING MULTI-USER DATA, AND BASE STATION - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and apparatus which indicate, using multiple CQIs, channel quality in the event multiple users are scheduled in the same time/frequency area, and to a method and apparatus which estimate a channel state using said multiple CQIs. According to the embodiments of the present invention, a channel state can be estimated in a more accurate manner in a multi-user MIMO system. | 12-13-2012 |
20120314678 | METHOD AND DEVICE FOR PROVIDING CONTROL INFORMATION FOR UPLINK TRANSMISSION IN WIRELESS COMMUNICATION SYSTEM SUPPORTING UPLINK MULTI-ANTENNA TRANSMISSION - The present invention relates to a wireless communication system, and more particularly, a method and device for providing control information for uplink transmission in a wireless communication system supporting uplink multi-antenna transmission. An uplink multi-antenna transmission scheduling method, according to one embodiment of the present invention, comprises the following steps: creating downlink control information (DCI) containing respective modulation and coding scheme (MCS) information for a first and a second transport block; transmitting said created downlink control information, which schedules uplink transmissions from one or more of first and second transport blocks through a downlink control channel; and receiving uplink transmission, scheduled according to the downlink control information, through an uplink data channel, wherein one transport block can be disabled, if MCS information for one transport block among of the first or the second transport blocks has a predetermined value. | 12-13-2012 |
20120315859 | METHOD AND USER EQUIPMENT FOR MEASURING INTERFERENCE, AND METHOD AND BASE STATION FOR RECEIVING INTERFERENCE INFORMATION - A method and apparatus for providing information indicating radio resources for multi-cell interference measurement at a BS so that a UE can more accurately measure interference are disclosed. | 12-13-2012 |
20120320813 | METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method for transmitting acknowledgement/negative ACK (ACK/NACK) in a wireless communication system which supports carrier aggregation, and to an apparatus for the method, wherein the method comprises the following steps: detecting one or more control channels from a plurality of component carrier; receiving one or more data indicated by the downlink control information loaded onto said one or more control channels; and transmitting ACK/NACK information relating to said one or more data via a physical uplink control channel (PUCCH), wherein each of the pieces of downlink control information includes count information which is set in connection with the entire control channel actually allocated to a terminal. | 12-20-2012 |
20120320839 | METHOD AND APPARATUS FOR PERFORMING A HARQ IN A WIRELESS COMMUNICATION SYSTEM - The present invention provides a method and apparatus for performing a HARQ in a wireless communication system. In the method for performing a HARQ according to the present invention, a terminal transmits an uplink data over a PUSCH (Physical Uplink Shared Channel); and receives an ACK/NACK (Acknowledgement/Non-Acknowledgement) signal over a Physical Hybrid-ARQ Indicator Channel (PHICH) corresponding to the PUSCH, with the signal indicating whether the uplink data is received through a plurality of layers. Here, downlink resources to which a PHICH is mapped for each of the plurality of layers do not overlap each other. Those downlink resources to which a PHICH is mapped for each of the plurality of layers can be determined based on different cyclic shift values that are allocated to the plurality of the layers, respectively. | 12-20-2012 |
20120320880 | METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method for transmitting control information via a PUCCH in a wireless communication system, and to an apparatus for the method, wherein the method comprises the following steps: joint-coding a plurality of pieces of control information to obtain a single code word; obtaining a first modulated symbol sequence from the single code word; obtaining, from the first modulated symbol sequence, a plurality of second modulated symbol sequences corresponding to each slot in the PUCCH; cyclically shifting the plurality of second modulated symbol sequences in a time domain to obtain a plurality of third modulated symbol sequences; performing a discrete Fourier transform (DFT) precoding process on the plurality of third modulated symbol sequences to obtain a plurality of complex symbol sequences in a frequency domain; and transmitting the plurality of complex symbol sequences via the PUCCH. | 12-20-2012 |
20120320951 | METHOD AND DEVICE FOR TRANSMITTING UPLINK CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM - Disclosed are a method and a device for transmitting uplink control information (UCI) by a terminal in a wireless communication system. The UCI transmission method comprises the steps of: generating an encoding information bit stream by performing channel coding for a UCI bit stream; generating complex modulation symbols by performing modulation for the generated encoding information bit stream; spreading the complex modulation symbols in block-wise on the basis of an orthogonal sequence; and transmitting the spread complex modulation symbols to a base station. The encoding information bit stream is generated by a channel coding for circularly repeating the UCI bit stream. | 12-20-2012 |
20120327783 | METHOD AND DEVICE FOR A HYBRID AUTOMATIC REPEAT REQUEST IN A MULTI-CARRIER SYSTEM - A method of performing hybrid automatic repeat request (HARQ) in a carrier aggregation system is provided. The method includes: monitoring a downlink (DL) grant for initial DL data transmission in a first DL component carrier (CC); receiving initial DL data through a second DL CC indicated by the DL grant; decoding the initial DL data; transmitting a not-acknowledgment (NACK) signal when decoding of the initial DL data fails; monitoring a DL grant for retransmission of the DL data in the first DL CC; and receiving DL data retransmitted through the second DL CC, wherein the second DL CC is any one of a plurality of DL CCs having a predetermined link relation with the first DL CC, and the DL grant for the initial transmission includes a carrier indication field indicating the second DL CC and resource allocation information for the initially transmitted DL data. | 12-27-2012 |
20120327875 | METHOD AND APPARATUS FOR TRANSMITTING UPLINK CONTROL INFORMATION IN A WIRELESS COMMUNICATION SYSTEM - The present invention provides a method and apparatus for transmitting uplink control information (UCI) with user equipment in a wireless communication system. The user equipment performs channel coding on information bits of UCI to generate encoded information bits; modulates the generated encoded information bits to generate complex modulation symbols; spreads the complex modulation symbols blockwise into a plurality of single carrier frequency division multiple access (SC-FDMA) symbols on the basis of an orthogonal sequence; and transmits the spread complex modulation symbols to a base station. | 12-27-2012 |
20120327885 | CONTROL INFORMATION TRANSMISSION METHOD AND A DEVICE THEREFOR - The present invention relates to a wireless communication system supporting carrier aggregation. More specifically, the present invention relates to a method in which a terminal transmits ACK/NACK and to a device therefor; and relates to a method comprising the steps of: receiving one or more items of data simultaneously on a plurality of carriers; generating an ACK/NACK payload comprising one or more items of ACK/NACK information about the one or more items of data; and transmitting the ACK/NACK payload, wherein the position of each item of ACK/NACK information in the ACK/NACK payload corresponds to respective carriers, and the present invention relates to a device for the method. | 12-27-2012 |
20130010684 | APPARATUS AND METHOD FOR TRANSMITTING/RECEIVING CONTROL INFORAMTION IN A WIRELESS COMMUNICATION SYSTEM THAT SUPPORTS CARRIER AGGREGATION - Disclosed are an apparatus and method for transmitting/receiving control information in a wireless communication system that supports carrier aggregation. According to the present invention, a processor of a base station device that transmits control information configures a component carrier type for each of a plurality of downlink component carriers (DL CCs) in accordance with whether or not each of the plurality of DL CCs can support a relay PDCCH (R-PDCCH), which is a downlink control channel dedicated to a relay node. A transmitting antenna transmits information on the type of each of the configured DL Cs to the relay node. | 01-10-2013 |
20130010714 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING PDCCH USING DCI HAVING ADJUSTED SIZE - The present invention relates to a method for adjusting a size of an information bit used in a control channel and an apparatus for performing the same. In addition, the present invention relates to a method for searching for a control channel including an information bit having an adjusted size. A method for receiving a physical downlink control channel (PDCCH) in a wireless access system for supporting multi-carriers as one embodiment of the present invention comprises the steps of: performing blind decoding in a search space allocated in a terminal to search for a PDCCH; and receiving the PDCCH including downlink control information (DCI) having a size adjusted in the search space. At this time, the size of the DCI can be adjusted by considering a bandwidth allocated in the terminal, a transmission mode of a component carrier (CC) allocated in the terminal, and the number of antennas of the terminal. | 01-10-2013 |
20130010724 | METHOD AND APPARATUS FOR RESOLVING THE CONFUSION IN CCES - The present invention relates to a wireless communication system. In particular, the present invention relates to a method for handling physical downlink control channels (PDCCHs) in a user equipment, the method comprising: receiving a plurality of control channel elements (CCEs) from a base station; performing blind decoding of the plurality of CCEs in CCE aggregation units; and identifying a CCE aggregation level used for the PDCCH transmission, on the basis of the blinding decoding result, wherein the CCE aggregation level is relevant resource mapping of the control information included in the PDCCH. | 01-10-2013 |
20130010742 | METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and apparatus for transmitting a plurality of PUCCHs in a wireless communication system, wherein the method comprises the following steps: checking a resource for a first PUCCH among the plurality of PUCCHs; inferring, from the resource for the first PUCCH, a resource for the remaining one or more second PUCCHs excluding the first PUCCH among the plurality of PUCCHs; and transmitting the plurality of PUCCHs simultaneously via corresponding relevant resources. | 01-10-2013 |
20130010745 | METHOD AND APPARATUS FOR EFFICIENTLY TRANSMITTING CONTROL INFORMATION TO SUPPORT UPLINK MULTIPLE ANTENNA TRANSMISSION - The present invention relates to a method for transmitting control information regarding uplink multiple antenna transmission in a base station according to one embodiment of the present invention may comprise the steps of: transmitting DCI for scheduling uplink transmission of a plurality of data blocks through a PDCCH; receiving the plurality of data blocks scheduled by the DCI using a plurality of layers; transmitting through a PHICH, information which indicates ACK or NACK for each of the plurality of received data blocks; and receiving a retransmission of the negative-acknowledged data blocks using one or more layers. When the number of the negative-acknowledged data blocks is not the same as the number of data blocks indicated in the PDCCH, one or more layers may be the same as those used in a previous transmission of the negative-acknowledged data blocks. | 01-10-2013 |
20130016604 | METHOD AND APPARATUS FOR EFFICIENTLY TRANSMITTING CONTROL INFORMATION TO SUPPORT UPLINK MULTIPLE ANTENNA TRANSMISSION - The present invention relates to a method for transmitting control information regarding uplink multiple antenna transmission may comprise the steps of: transmitting DCI for scheduling the uplink transmission of a plurality of data blocks through a PDCCH; receiving the plurality of data blocks scheduled by the DCI; transmitting information which indicates positive acknowledgement or negative acknowledgement to each of the plurality of received data blocks through the PHICH; and receiving retransmission for the negative acknowledged data blocks. When the number of the negative-acknowledged data blocks is not equal to the number data blocks indicated in the PDCCH, a pre-coding matrix, which is for the number of transmission layers equivalent to that of layers corresponding to the negative-acknowledged data blocks, may be used for retransmission. | 01-17-2013 |
20130016688 | METHOD AND APPARATUS FOR TRANSMITTING ACK/NACK SIGNALS - The present invention relates to a method and apparatus in which a base station transmits a physical ARQ channel (PHICH) in a wireless communication system. More particularly, the present invention relates to a method and apparatus for transmitting a PHICH, wherein the method comprises the following steps: generating a plurality of hybrid of ARQ (HARQ) indicators: channel-coding the plurality of HARQ indicators into a single HARQ codeword; and transmitting the HARQ codeword via the PHICH, wherein the value of a portion of the HARQ codeword indicates individual value of each of HARQ indicators, and the value of the rest of the HARQ codeword indicators a value of joint operation of the plurality of HARQ indicators. | 01-17-2013 |
20130021984 | METHOD FOR WIRELESS COMMUNICATION BETWEEN A USER DEVICE AND A BASE STATION IN A WIRELESS COMMUNICATION SYSTEM SUPPORTING UPLINK AND DOWNLINK MULTI CARRIERS, AND A DEVICE FOR IMPLEMENTING THE METHOD - A method for wireless communication supporting uplink and downlink multi carriers Includes performing initial access through one of at least two downlink component carriers among multiple downlink component carriers including the at least two downlink component carriers through which the user equipment is allowed to perform the initial access; and transmitting via an uplink component carrier allocated to the user equipment by using a carrier identifier, wherein the carrier identifier is applied to the uplink component carrier and is obtained from the downlink component carrier through which the initial access is performed, and wherein the system pre-defines one-to-one correspondence between multiple downlink component carriers and multiple uplink component carriers, and wherein the downlink component carrier through which the initial access is performed and the uplink component carriers allocated to the user equipment do not match the one-to-one correspondence pre-defined by the system. | 01-24-2013 |
20130021991 | METHOD AND APPARATUS FOR PROVIDING DOWNLINK CONTROL INFORMATION IN AN MIMO WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method in which a user equipment receives a downlink signal from a base station in a wireless communication system that supports downlink MIMO transmission according to one embodiment of the present invention comprises: receiving downlink control information that includes information indicative of the number of layers (N, 1≦N≦8) where one or two enabled code words of the downlink MIMO transmission are mapped; on the basis of the downlink control information, receiving downlink data transmitted over the respective N layers and a UE-specific reference signal for each of the N layers; and decoding the downlink data on the basis of the UE-specific reference signals, wherein the information indicative of the number of layers can further include information on a code for identifying the UE-specific reference signals. | 01-24-2013 |
20130022017 | METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system. More specifically, the present invention relates to a method for transmitting control information through a PUCCH in a wireless communication system and an apparatus for same comprising the steps of: obtaining a plurality of second modulation symbol streams corresponding to a plurality of SC-FDMA (Single Carrier Frequency Division Multiplexing) symbols by diffusing a plurality of first modulation symbol streams to form the first modulation symbol streams corresponding to the SC-FDMA symbols within a first slot; obtaining a plurality of complex symbol streams by performing a DFT (Discrete Fourier Transform) pre-coding process for the plurality of second modulation symbol streams; and transmitting the plurality of complex symbol streams through the PUCCH wherein the plurality of second modulation symbol streams are scrambled in a SC-FDMA symbol level. | 01-24-2013 |
20130022019 | METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system. More specifically, the present invention relates to a method for transmitting control information through a PUCCH in a wireless communication system and an apparatus thereof, comprising the steps of: spreading modulation symbol sets to first slot, by using a first code; spreading modulation symbol sets to second slot, by using a second code, wherein the length of the second code is varied according to the number of the SC-FDMA symbols for PUCCH transmission. | 01-24-2013 |
20130028213 | EFFECTIVE METHOD AND DEVICE FOR TRANSMITTING CONTROL INFORMATION FOR SUPPORTING UPLINK MULTI-ANTENNA TRANSMISSION - Disclosed is a method for transmitting control information on uplink multi-antenna transmission from a base station and the method includes: transmitting DCI that schedules uplink transmission of a first data block and a second data block through a PDCCH; receiving the first and second data blocks scheduled by the DCI; transmitting information indicating ACK or NACK for the received first and second data blocks, respectively, by using a first PHICH for the first data block and a second PHICH resource for the second data block; receiving a retransmission for a negative-acknowledged data block; and transmitting information indicating ACK or NACK of the retransmission of the negative-acknowledged data block by using the first PHICH resource when the number of negative-acknowledged data blocks is not identical to the number of data blocks that the PDCCH indicates. | 01-31-2013 |
20130028225 | METHOD AND DEVICE FOR EFFICIENT FEEDBACK IN WIRELESS COMMUNICATION SYSTEM SUPPORTING MULTIPLE ANTENNAS - The present invention relates to a method for transmitting channel status information comprising: transmitting a rank indicator (RI) and a precoding type indicator (PTI) based on a first reporting period, transmitting during the first reporting period a broadband first precoding matrix indicator (PMI) based on a second reporting period, and transmitting at least once during the second reporting period a broadband second PMI and a broadband CQI, when the PTI has a first value; transmitting the RI and the PTI based on the first reporting period, transmitting during the first reporting period the broadband second PMI and the broadband CQI based on a third reporting period; and transmitting at least once during the third period a subband second PMI and a subband CQI, when the PTI has a second value; wherein the subband CQI on an entire cycle of a set bandwidth portion can be transmitted at least once. | 01-31-2013 |
20130028238 | METHOD FOR TRANSMITTING DOWNLINK CONTROL CHANNEL IN A MOBILE COMMUNICATION SYSTEM AND A METHOD FOR MAPPING THE CONTROL CHANNEL TO PHYSICAL RESOURCE USING BLOCK INTERLEAVER IN A MOBILE COMMUNICATION SYSTEM - A method for transmitting a downlink control channel in a mobile communication system and a method for mapping the control channel to physical resources using a block interleaver are provided. In order to transmit a downlink control channel in a mobile communication system, information bits are modulated to generate one or more modulation symbols according to a specific modulation scheme, the modulation symbols are interleaved using a block interleaver, and the interleaved modulated symbols are mapped to resource elements allocated for transmission of at least one control channel in a subframe, thereby transmitting the at least one control channel. | 01-31-2013 |
20130028345 | METHOD AND DEVICE FOR EFFICIENT FEEDBACK IN WIRELESS COMMUNICATION SYSTEM SUPPORTING MULTIPLE ANTENNAS - The present description relates to a wireless communication system, and more particularly, discloses a method and a device for efficient feedback in a wireless communication system supporting multiple antennas. According to one embodiment of the present invention, the method for transmitting channel status information on a downlink transmission through an uplink, in the wireless communication system, comprises the following steps: transmitting a rank indicator (RI) in a first subframe; transmitting a first precoding matrix index (PMI) in a second subframe; and transmitting a second PMI and channel quality information (CQI) in a third subframe, wherein the precoding matrix to be applied to the transmission of the downlink can be determined by a combination of the first and second PMIS. | 01-31-2013 |
20130039307 | METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system. The present invention relates to a method for transmitting ACK/NACK in a wireless communication system in which carrier aggregation is set, and an apparatus therefor. Specifically, the present invention relates to an ACK/NACK transmission method and an apparatus therefor, the method comprising the steps of: receiving information on a plurality of physical uplink control channel (PUCCH) resources via upper layer signaling; receiving a transmit power control (TPC) field on a secondary carrier through a physical downlink control channel (PDCCH); receiving data indicated by the PDCCH; and transmitting ACK/NACK for the data, wherein the ACK/NACK is transmitted using a PUCCH resource which is indicated by the value of the TPC field among the plurality of PUCCH resources. | 02-14-2013 |
20130039334 | METHOD AND DEVICE FOR CONTROL INFORMATION TRANSMISSION IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method for transmitting control information through a PUCCH in a wireless system and to a device therefore. | 02-14-2013 |
20130039398 | METHOD AND APPARATUS FOR TRANSMITTING UPLINK CONTROL INFORMATION IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more particularly, to a method and apparatus for transmitting uplink control information in a wireless communication system. A method for transmitting uplink control information in a wireless communication system according to one embodiment of the present invention comprises a step of repetition coding information bit of N-bit to generate an encoded bit; and a step of transmitting the encoded bit via a physical uplink shared channel, wherein bit inversion can be applied to the bit obtained by repeating the information bit of N-bit, on the basis of the number 1 contained in the information bit of N-bit. | 02-14-2013 |
20130044662 | METHOD AND APPARATUS FOR PERFORMING POWER CONTROL BY TERMINAL IN WIRELESS COMMUNICATION SYSTEM USING MULTIPLE CARRIERS - The present invention relates to a terminal in a wireless communication system that supports multiple carriers, the terminal comprising: a receiving module that receives, from a base station, control information which indicates whether to operate hybrid automatic repeat request (HARQ) process-based multiple carriers; and a process that controls to allow the multiple carriers to be received in a section at which a particular HARQ process indicated in the control information is activated. | 02-21-2013 |
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 |
20130058295 | METHOD AND APPARATUS FOR EFFICIENT FEEDBACK IN A WIRELESS COMMUNICATION SYSTEM THAT SUPPORTS MULTIPLE ANTENNAS - The present invention relates to a wireless communication system, and more particularly, to a method and apparatus for efficient feedback in a wireless communication system that supports multiple antennas. A method for transmitting, via an uplink, channel state information for downlink transmission in a wireless communication system according to one embodiment of the present invention, comprises the following steps: receiving a downlink signal via a downlink channel; generating an RI for the downlink channel, selecting a first PMI and a second PMI on the basis of the rank indicated by the generated RI, and calculating a CQI on the basis of pre-coding information determined by the combination of the selected first and second PMIs; and transmitting the RI, the first PMI, the second PMI, and/or the CQI via an uplink channel, wherein said first PMI and second PMI can be transmitted on different uplink subframes if the uplink channel is a PUCCH. | 03-07-2013 |
20130058306 | METHOD AND APPARATUS FOR TRANSMITTING APERIODIC SOUNDING REFERENCE SIGNAL IN WIRELESS COMMUNICATION SYSTEM - A method and apparatus for transmitting an aperiodic sounding reference signal (SRS) in a wireless communication system is provided. The method include receiving a downlink control information (DCI) format including a triggering signal for triggering a transmission of an aperiodic SRS from a base station (BS) via a physical downlink control Channel (PDCCH), blind-decoding the PDCCH in a UE-specific search space, and transmitting the aperiodic SRS triggered based on the triggering signal to the BS. | 03-07-2013 |
20130064172 | APPARATUS AND METHOD FOR TRANSMITTING AND RECEIVING CONTROL INFORMATION IN A WIRELESS COMMUNICATION SYSTEM - Disclosed are an apparatus and a method for transmitting/receiving control information in a wireless communication system. In a repeater according to the present invention, a receiving antenna can receive control information for a hybrid automatic repeat reQuest ACKnowledgement (HARQ ACK) feedback on the data transmission of a base station from the base station through higher layer signaling. On the basis of the control information, a processor can determine a resource in an upper link control channel to be used for the transmission of the HARQ feedback. A transmitting antenna can transmit the HARQ feedback to the base station through the resource that has been determined. | 03-14-2013 |
20130064193 | METHOD FOR DECODING CONTROL INFORMATION OF TERMINAL IN CARRIER AGGREGATION SYSTEM AND TERMINAL THEREOF - Provided is a method of decoding control information of a terminal in a carrier aggregation system. The method includes: receiving downlink control information including a carrier indication field from a base station; and decoding the downlink control information, wherein the downlink control information includes at least two or more fields, and a component carrier indicated by a value of the carrier indication field is determined according to a value of a specific field among the at least two or more fields. | 03-14-2013 |
20130070690 | COMMUNICATION METHOD OF TERMINAL IN CARRIER AGGREGATION SYSTEM, AND TERMINAL - The present invention provides a communication method of a terminal in a carrier aggregation system. The method comprises: determining indexes relative to a plurality of downlink component carriers and a plurality of uplink component carriers; receiving, from a base station, DCI through at least one downlink component carrier among the plurality of downlink component carriers; and transmitting an uplink signal to the base station through an uplink component carrier determined on the basis of DCI, wherein the DCI includes an index that indicates the uplink component carrier which transmits the uplink signal among the plurality of uplink component carriers. | 03-21-2013 |
20130070702 | METHOD AND APPARATUS FOR THE EFFICIENT TRANSMISSION OF CONTROL INFORMATION FOR SUPPORTING UPLINK TRANSMISSION USING MULTIPLE ANTENNAS - The present invention relates to a wireless communication system, and to a method and apparatus for efficiently transmitting control information for supporting an uplink transmitting technique using multiple antennas. According to one embodiment of the present invention, the method for transmitting control information for an uplink transmission using multiple antennas comprises the following steps: receiving a plurality of data blocks; transmitting ACK/NACK information for the received data blocks via a PHICH; transmitting, via a PDCCH, information containing an indicator which indicates whether to retransmit each of the plurality of data blocks; and receiving an uplink transmission in accordance with the combination of the ACK/NACK information and the information indicated by the indicator. | 03-21-2013 |
20130070704 | METHOD FOR TRANSMITTING AND RECEIVING DOWNLINK CONTROL INFORMATION - A method for efficiently transmitting and receiving downlink control information is disclosed. The method includes, at a base station, receiving feedback information including a precoding matrix index (PMI) from a user equipment (UE) and transmitting precoding information having a predetermined bit number according to the number of antenna ports and a transmission mode of the base station. The precoding information of a predetermined transmission mode in the precoding information includes confirmation information indicating that the base station uses a PMI which is recently received from the UE. | 03-21-2013 |
20130070732 | METHOD AND APPARATUS FOR MAPPING A PLURALITY OF LAYERS TO A PLURALITY OF ANTENNA PORTS IN A WIRELESS COMMUNICATION SYSTEM - Provided are a method and apparatus for allocating a plurality of layers to a plurality of antenna ports in a wireless communication system. The method comprises: mapping the plurality of layers to the respective antenna ports; and mapping demodulation reference signals (DMRS) of the plurality of layers to a first code division multiplexing (CDM) set or to a second CDM set, and transmitting the signals via the plurality of antenna ports. | 03-21-2013 |
20130077660 | SIGNAL TRANSMISSION METHOD AND APPARATUS USING CODEBOOK IN WIRELESS COMMUNICATION SYSTEM SUPPORTING MULTIPLE ANTENNAS - The present invention relates to a method for transmitting, by a base station, a downlink signal using a plurality of transmission antennas comprises the steps of: applying a precoding matrix indicated by the PMI, received from a terminal, in a codebook to a plurality of layers, and transmitting the precoded signal to the terminal through a plurality of transmission antennas. Among precoding matrices included in the codebook, a precoding matrix for even number transmission layers can be a 2×2 matrix containing four matrices (W1s), the matrix (W1) having rows of a number of transmission antennas and columns of half the number of transmission layers, the first and second columns of the first row in the 2×2 matrix being multiplied by 1, the first column of the second row being multiplied by coefficient “a” of a phase, and the first column of the second row being multiplied by “−a”. | 03-28-2013 |
20130083766 | METHOD AND DEVICE FOR TRANSMITTING AND RECEIVING UPLINK CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM THAT SUPPORTS MULTIPLE CARRIERS - The present invention relates to a wireless communication system, and more specifically, to a method and a device for transmitting and receiving uplink control information in a wireless communication system that supports multiple carriers. According to one embodiment of the present invention, a method for allowing a terminal to transmit uplink control information (UCI) in a wireless communication system that supports multiple carriers comprises the steps of: receiving one or more uplink grants from a base station; obtaining an indicator which indicates an uplink carrier on which said UCI is transmitted from each of the one or more uplink grants; and transmitting said UCI through a physical uplink shared channel (PUSCH) on the uplink carrier indicated by said indicator, if the one or more uplink grants schedule uplink data transmission on the uplink carrier indicated by said indicator. | 04-04-2013 |
20130094448 | METHOD AND APPARATUS FOR TRANSMITTING SOUNDING REFERENCE SIGNAL IN RADIO COMMUNICATION SYSTEM - According to an embodiment, the invention provides a method for receiving a sounding reference signal (SRS) at a base station in a wireless communication system, the method including: transmitting a downlink control information (DCI) for triggering a second SRS to a user equipment; and receiving at least one of a first SRS triggered by a higher layer and the second SRS triggered by the DCI from the user equipment, wherein, if both transmission of the first SRS and transmission of the second SRS occur in a same subframe at the user equipment, the second SRS is only received from the user equipment. | 04-18-2013 |
20130100919 | METHOD AND AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system. Specifically, the present invention relates to a method for transmitting control information through a PUCCH in a wireless communication system and an apparatus therefore including the steps of: generating the control information; selecting a particular PUCCH format from a plurality of PUCCH formats; and transmitting the control information through the particular PUCCH format. | 04-25-2013 |
20130107854 | METHOD AND DEVICE FOR TRANSMITTING CONTROL INFORMATION IN A WIRELESS COMMUNICATION SYSTEM | 05-02-2013 |
20130121266 | METHOD AND APPARATUS FOR GENERATING A REFERENCE SIGNAL SEQUENCE IN A WIRELESS COMMUNICATION SYSTEM - The present invention provides a method and apparatus for generating a reference signal sequence by user equipment (UE) in a wireless communication system. The UE receives a UE-specific sequence group hopping (SGH) parameter that is specific to itself, and generates a reference signal sequence based on a base sequence in each slot unit. The base sequence is classified into sequence-group numbers determined in each of the slot units by the UE-specific SGH parameter indicating whether SGH has been carried out, and base sequence numbers. | 05-16-2013 |
20130121278 | METHOD AND APPARATUS FOR ALLOCATING RESOURCES IN A WIRELESS COMMUNICATION SYSTEM - The present invention provides a method and apparatus for allocating uplink resources in a wireless communication system. A base station transmits uplink resource allocation information to a terminal in order to allocate a plurality of clusters that are dispersed in a frequency domain to uplink resources, and receives data on the plurality of clusters. The plurality of clusters is allocated on the bases of at least one of the following: location of each cluster in the frequency domain and gap between the plurality of clusters. | 05-16-2013 |
20130121279 | METHOD AND APPARATUS FOR TRANSMITTING APERIODIC SOUNDING REFERENCE SIGNAL IN WIRELESS COMMUNICATION SYSTEM - A method and apparatus for transmitting an aperiodic sounding reference signal (SRS) in a wireless communication system is provided. The method include receiving a power offset parameter for an aperiodic SRS set by a base station (BS) through an higher layer, setting transmission power of the aperiodic SRS based transmission power on the power offset parameter, and transmitting the aperiodic SRS to the BS based on the set transmission power of the aperiodic SRS. | 05-16-2013 |
20130128855 | METHOD AND APPARATUS FOR TRANSMITTING APERIODIC SOUNDING REFERENCE SIGNALS IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method and apparatus in which a terminal transmits aperiodic sounding reference signals (SRSs) in a wireless communication system. The terminal receives a triggering bit for triggering the transmission of the aperiodic SRSs from a base station, and transmits the aperiodic SRSs through at least one uplink (UL) component carrier (CC) from among a plurality of uplink component carriers. | 05-23-2013 |
20130129013 | METHOD AND APPARATUS FOR INFORMATION TRANSMISSION IN A RADIO COMMUNICATION SYSTEM - A method of transmitting, by a transmitter, information in a wireless communication system, the method includes generating first and second symbols; generating first and second transmit vectors on the basis of an Alamouti code from the first and second symbols; and transmitting the first transmit vector through a first antenna and transmitting the second transmit vector through a second antenna. The first transmit vector consists of a first transmit symbol and a second transmit symbol. The second transmit vector consists of a third transmit symbol and a fourth transmit symbol. The first, second, third, and fourth transmit symbols are transmitted based on first and second resource indexes. The first symbol is a first modulation symbol for first information, and the second symbol is a second modulation symbol for second information. | 05-23-2013 |
20130139020 | METHOD OF TRANSMITTING DATA USING CONSTELLATION REARRANGEMENT - A data retransmission method using hybrid automatic repeat request (harq) includes transmitting a data block, receiving a retransmission request signal for the data block, generating a retransmission block by performing swapping or inversion between bits constituting the data block according to the retransmission request signal, and transmitting the retransmission block. | 05-30-2013 |
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 |
20130148614 | METHOD AND APPARATUS FOR CONTROLLING TRANSMISSION POWER IN WIRELESS COMMUNICATION SYSTEM - Provided is a method and apparatus for controlling transmission power in a wireless communication system. A terminal sets transmission power of a physical uplink control channel (PUCCH). Among a plurality of physical uplink shared channels (PUSCHs), at least one PUSCH to which uplink control information (UCI) is not mapped is decreased in transmission power based on a maximum transmission power of the terminal and the transmission power of the PUCCH, and transmission power of at least one second PUSCH, of the plurality of PUSCHs to which UCI is mapped, is set. At this time, the UCI and uplink data are transmitted through the PUCCH, the at least one first PUSCH, and the at least one second PUSCH; and the at least one first PUSCH and the at least one second PUSCH are allocated to component carriers (CCs) of a plurality of uplinks (ULs). | 06-13-2013 |
20130155969 | COMMUNICATION METHOD FOR A TERMINAL IN A MULTI-CARRIER SYSTEM USING A PLURALITY OF COMPONENT CARRIERS - Provided is a communication method of a terminal in a multi-carrier system using a plurality of component carriers. The method includes: receiving a reconfiguration message indicating whether downlink control information (DCI) includes a carrier indication field (CIF); receiving a plurality of DCIs indicating a resource used to transmit a reconfiguration complete message in response to the reconfiguration message; and transmitting the reconfiguration complete message on the basis of resource allocation information included in DCI which is successfully decoded among the plurality of DCIs, wherein the plurality of DCIs include first DCI used before the CIF of the DCI is reconfigured by the reconfiguration message and second DCI used after the CIF of the DCI is reconfigured by the reconfiguration message. | 06-20-2013 |
20130163525 | METHOD FOR SETTING A CARRIER INDICATION FIELD IN A MULTI-CARRIER SYSTEM - Disclosed is a method for setting a carrier indication field indicating an element carrier in a multi-carrier system using a plurality of element carriers. The method includes: transmitting a value of a carrier indication field (CIF) and first CIF setting information that indicates a first mapping relationship between element carriers; transmitting downlink control information (DCI) including a carrier indication field; and transmitting a value of a CIF and second CIF setting information that indicates a second mapping relationship between element carriers, wherein the carrier indication field is a field indicating any one of the plurality of element carriers, and at least one element carrier is mapped with the same carrier indication field value in the first and second mapping relationships. | 06-27-2013 |
20130170455 | METHOD FOR SPECIFYING TRANSPORT BLOCK TO CODEWORD MAPPING AND DOWNLINK SIGNAL TRANSMISSION METHOD USING THE SAME - A method for specifying a transport block-to-codeword mapping relationship and a method for transmitting a downlink signal using the same are described. If a swap flag has a first logic value, a first transport block is mapped to a first codeword and a second transport block is mapped to a second codeword. If the swap flag has a second logic value, the first transport block is mapped to the second codeword and the second transport block is mapped to the first codeword. If the size of any one of two transport blocks is 0, the swap flag is not used. | 07-04-2013 |
20130182670 | METHOD FOR MULTIPLEXING DATA AND CONTROL INFORMATION - A method for multiplexing a data information stream, including a systematic symbol and a non-systematic symbol, and a control information stream of at least three types in a wireless mobile communication system is disclosed. The method includes mapping the data information stream to a resource area so that the systematic symbol is not mapped to a specific resource area to which the control information stream is mapped, and mapping the control information stream to the specific resource area. | 07-18-2013 |
20130188587 | METHOD OF TRANSMITTING UPLINK CONTROL SIGNALS IN WIRELESS COMMUNICATION SYSTEM - A method and device for transmitting uplink control signals in a wireless communication system, the method including: reserving a preassigned scheduling request (SR) physical uplink control channel (PUCCH) resource used for transmission of a SR; determining a frequency domain sequence and an orthogonal sequence based on the preassigned SR PUCCH resource; spreading an ACK/NACK for Hybrid Automatic Repeat Request (HARQ) with the frequency domain sequence and the orthogonal sequence to generate a mapped sequence; and transmitting the mapped sequence. | 07-25-2013 |
20130195034 | METHOD AND DEVICE FOR TRANSMITTING REFERENCE SIGNAL IN WIRELESS COMMUNICATION SYSTEM - Disclosed are a method and device for transmitting a reference signal in a wireless communication system. A base station: maps each demodulation reference signal (DMRS) of each of a plurality of layers into a first resource element (RE) set and a second resource element set including four resource elements over four orthogonal frequency division multiplexing (OFDM) symbols within a subframe; allocates first orthogonal cover codes (OCCs) having a length of 4 to each DMRS mapped into said first resource element set; allocates second OCCs having a length of 4 to each DMRS mapped into said second resource element set; and transmits each DMRS mapped into said first resource element set and said second resource element set. Said subframe includes two slots, and each slot includes six OFDM symbols. Said second OCC are formed by respectively swapping positions of bits that constitute said first OCCs. | 08-01-2013 |
20130201931 | METHOD AND APPARATUS FOR GENERATING A REFERENCE SIGNAL SEQUENCE IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method and apparatus for generating a reference signal sequence in a wireless communication system. User equipment receives a cell-specific sequence hopping parameter from a base station, receives, from the base station, a user equipment (UE)-specific sequence group hopping (SGH) parameter which is specific to said user equipment, and generates a reference signal sequence on the basis of a base sequence number of a base sequence, wherein the base sequence number is determined for each slot on the basis of the cell-specific sequence hopping parameter and of the use equipment-specific sequence group hopping parameter. Here, the determination of whether or not to apply sequence hopping to the base sequence number indicated by the user equipment-specific sequence group hopping parameter overrides that of whether or not to apply sequence hopping to the base sequence number indicated by the cell-specific sequence hopping parameter. | 08-08-2013 |
20130208705 | METHOD AND DEVICE FOR PROVIDING CONTROL INFORMATION FOR UPLINK TRANSMISSION IN WIRELESS COMMUNICATION SYSTEM SUPPORTING UPLINK MULTI-ANTENNA TRANSMISSION - The present invention relates to a wireless communication system, and more particularly, a method and device providing control information for uplink transmission in a wireless communication system supporting uplink multi-antenna transmission. An uplink multi-antenna transmission scheduling method, according to one embodiment of the present invention, comprises the following steps: creating downlink control information (DCI), which includes precoding information showing a transmission rank and a precoding matrix of an uplink transmission; transmitting said created downlink control information, which schedules the transmission of an uplink, through a downlink control channel; and receiving said uplink transmission, which is scheduled according to said downlink control information, through an uplink data channel, wherein the size of said precoding information can be determined with respect to the available number of precoding matrices, according to the number of said multi-antennas and uplink transmission rank. | 08-15-2013 |
20130215814 | METHOD AND APPARATUS FOR TRANSMITTING DATA BETWEEN WIRELESS DEVICES IN WIRELESS COMMUNICATION SYSTEM - A method for transmitting data between wireless devices in a wireless communication system is provided. A first wireless device acquires downlink reception timing with a base station. The first wireless device determines transmission timing for direct communication with a second wireless device based on the downlink reception timing with the base station. The first wireless device transmits data for the direct communication to the second wireless device at the transmission timing for the direct communication. | 08-22-2013 |
20130229998 | METHOD AND DEVICE FOR TRANSMITTING AN UPLINK CONTROL SIGNAL IN A WIRELESS COMMUNICATION SYSTEM - Provided are a method and a device for transmitting an uplink control signal in a wireless communication system. User equipment selects uplink (UL) secondary component carrier (SCC) from a plurality of physical uplink shared channel (PUSCH)-scheduled UL SCCs in a carrier aggregation (CA) system including a plurality of UL component carriers (CCs), and transmits uplink control information (UCI) by piggybacking it on the PUSCH scheduled for the selected single UL SCC. Herein, the PUSCH is not scheduled for a primary CC (PCC) of the CA system. | 09-05-2013 |
20130262963 | METHOD AND APPARATUS FOR TRANSMITTING UPLINK DATA IN A WIRELESS ACCESS SYSTEM - A method of channel coding for transmitting data in a wireless access system includes: calculating a number C of code blocks by an equation of C=┌B/(Z−L)┐, wherein B denotes a size of an input bit sequence, wherein Z denotes a maximum size of the code blocks, and wherein L denotes a size of a cyclic redundancy check (CRC) which is to be attached to each of the code blocks; calculating a size B′ of a modified input bit sequence by an equation of B′=B+C*L; generating the code blocks based on the number C of the code blocks and the size B′ of the modified input bit sequence; and channel-coding the code blocks. | 10-03-2013 |
20130265977 | METHOD AND APPARATUS FOR TRANSMITTING APERIODIC SOUNDING REFERENCE SIGNAL IN WIRELESS COMMUNICATION SYSTEM - Provided are a method and an apparatus for transmitting an aperiodic sounding reference signal (SRS) in a wireless communication system. A terminal receives from a base station a triggering signal for triggering the transmission of the aperiodic SRS and the number of transmissions of the aperiodic SRS, and transmits the aperiodic SRS to the base station the number of times equal to the number of transmissions, using a plurality of subframes, on the basis of the triggering signal. | 10-10-2013 |
20130265978 | METHOD AND APPARATUS FOR TRANSMITTING APERIODIC SOUNDING REFERENCE SIGNAL IN WIRELESS COMMUNICATION SYSTEM - Provided is a method for transmitting an aperiodic sounding reference signal (SRS) in a wireless communication system. A terminal receives an SRS parameter, which indicates the number of antennas for transmitting the aperiodic SRS, by means of a physical downlink control channel (PDCCH), and transmits the aperiodic SRS to the base station using at least one antenna which belongs to the number of antennas for transmitting the apeirodic SRS. | 10-10-2013 |
20130286977 | METHOD OF TRANSMITTING SCHEDULING REQUEST IN A WIRELESS COMMUNICATION SYSTEM - A method and apparatus for requesting uplink resources in a wireless communication system is provided. A user equipment determines whether a scheduling request for requesting uplink resources is triggered. If the scheduling request is triggered, the user equipment transmits a first set of frequency domain sequences and a second set of frequency domain sequences in a subframe. | 10-31-2013 |
20130287072 | METHOD OF DATA TRANSMISSION IN MULTIPLE ANTENNA SYSTEM - A method of data transmission includes determining the number of layers, generating mapping symbols by mapping modulation symbols for a first codeword and modulation symbols for a second codeword to each layer, and transmitting the mapping symbols through a plurality of antennas. At least one of the first codeword and the second codeword is mapped to at least 3 layers and the number of layers is larger than 3. | 10-31-2013 |
20130336197 | METHOD AND APPARATUS FOR WIRELESS RESOURCE ALLOCATION FOR RELAY IN WIRELESS COMMUNICATION SYSTEM - According to one embodiment, a method of allocating a radio resource for a relay station includes: transmitting configuration information through a higher layer signal, the configuration information including information regarding an OFDM symbol at which a relay zone begins; allocating the relay zone to the relay station in a subframe based on the configuration information; and transmitting a relay control channel to the relay station in the relay zone. The subframe includes OFDM symbols in a time domain and subcarriers in a frequency domain. The relay zone includes a subset of the OFDM symbols in the time domain and a portion of the subcarriers in the frequency domain. The configuration information indicates an OFDM symbol from among a second OFDM symbol, a third OFDM symbol and a fourth OFDM symbol. The relay control channel is transmitted from the fourth OFDM symbol of the subframe. | 12-19-2013 |
20130336226 | METHOD AND DEVICE FOR TRANSMITTING DATA IN WIRELESS COMMUNICATION SYSTEM - Provided are a method and a device for transmitting wireless communication data. A terminal transmits a channel quality indicator (CQI) to a base station through a physical uplink control channel (PUCCH) which is allocated within a sounding reference signal (SRS) subframe that is determined in a UE-specific manner, and transmits uplink (UL) data through a physical uplink shared channel (PUSCH) which is allocated within said SRS subframe. Said SRS subframe is a subframe to which said PUSCH and said PUCCH are simultaneously allocated, and said SRS subframe contains a single carrier frequency division multiple access (SC-MDMA) symbol reserved for SRS transmission. | 12-19-2013 |
20130336256 | METHOD FOR ALLOCATING PHICH AND GENERATING REFERENCE SIGNAL IN SYSTEM USING SINGLE-USER MIMO BASED ON MULTIPLE CODEWORDS WHEN TRANSMITTING UPLINK - The present invention relates to a method for generating an uplink reference signal in a system supporting plural uplink-access transmission modes. The method comprises: a step for transmitting the reference signal configuration information about the configuration of a reference signal from a base station to a user device through an uplink grant PDCCH (Physical Downlink Control Channel), and a step for receiving from the user device a sub-frame including the reference signal that is generated based on the reference signal configuration information. The reference signal configuration information is prepared for plural uplink access transmission modes and includes a cyclic shift value for the sequence of the reference signal. The reference signal is supposed to be transmitted to an uplink, and the user device is set up to be operated in the uplink-access transmission mode that corresponding to the reference signal configuration information. | 12-19-2013 |
20140016577 | METHOD FOR TRANSMITTING DOWNLINK CONTROL CHANNEL IN A MOBILE COMMUNICATIONS SYSTEM AND A METHOD FOR MAPPING THE CONTROL CHANNEL TO PHYSICAL RESOURCE USING BLOCK INTERLEAVER IN A MOBILE COMMUNICATIONS SYSTEM - A method for transmitting a downlink control channel in a mobile communication system and a method for mapping the control channel to physical resources using a block interleaver are provided. In order to transmit a downlink control channel in a mobile communication system, information bits are modulated to generate one or more modulation symbols according to a specific modulation scheme, the modulation symbols are interleaved using a block interleaver, and the interleaved modulated symbols are mapped to resource elements allocated for transmission of at least one control channel in a subframe, thereby transmitting the at least one control channel. | 01-16-2014 |
20140023019 | METHOD FOR TRANSMITTING ACK/NACK SIGNAL IN WIRELESS COMMUNICATION SYSTEM APPLIED CARRIER AGGREGATION AND APPARATUS THEREFOR - A method for transmitting ACK/NACK signal in a wireless communication system applied carrier aggregation is disclosed herein. More specifically, the method includes receiving multiple transmission blocks respectively through multiple downlink component carriers from a base station, determining ACK/NACK responses corresponding to each of the multiple transmission blocks by decoding the multiple transmission blocks, mapping the ACK/NACK responses to a ACK/NACK state information, and transmitting the ACK/NACK state information through a single uplink component carrier, wherein ACK information included in the ACK/NACK state information indicates a number of ACK response among the ACK/NACK responses. | 01-23-2014 |
20140029545 | METHOD FOR EFFICIENTLY TRANSMITTING PHYSICAL CHANNEL IN MULTI-CARRIER AGGREGATION STATE TO SUPPORT BROADBAND - A method for receiving feedback information by a user equipment (UE) includes: receiving scheduling information from a base station through a first downlink component carrier linked with a first uplink component carrier; determining resources on a second uplink component carrier other than the first uplink component carrier using said scheduling information, wherein said scheduling information allows cross-carrier scheduling which schedules the resources on the second uplink component carrier; transmitting data to the base station through the determined resources on the second uplink component carrier; determining a PHICH (a Physical Hybrid ARQ Indicator Channel) resource to receive feedback information for the data transmitted on the second uplink component carrier, wherein the PHICH resource is predetermined as that of the first downlink component carrier in which the scheduling information was received; and receiving the feedback information from the base station through the determined PHICH resource. | 01-30-2014 |
20140056260 | METHOD AND APPARATUS FOR SELECTING MODULATION AND CODING SCHEME (MCS) INDEX BASED ON FREQUENCY SELECTIVITY - A method of selecting a modulation and coding scheme (MCS) index in a wireless communication system is disclosed. More specifically, the method includes measuring a frequency selectivity of a receiving channel, selecting a MCS index having a coding rate below a prescribed coding rate threshold value if the measured frequency selectivity is greater than or equal to a specified frequency selectivity threshold, and selecting the MCS index having the coding rate above or equal to the prescribed coding rate threshold value if the measured frequency selectivity is less than the specified frequency selectivity threshold. | 02-27-2014 |
20140064226 | METHOD FOR TRANSMITTING SUB-FRAME DESIGNATION INFORMATION TO A DOWNLINK IN A RADIO COMMUNICATION SYSTEM - A method of transmitting subframe designating information in downlink in a wireless communication system is disclosed. The present invention includes generating the subframe designating information for designating a subframe of a specific type in a radio frame and transmitting the generated subframe designating information to a user equipment, wherein the subframe designating information includes initial location information indicating an initial location of the subframe of the specific type on the radio frame and period information indicating a period for the subframe of the specific type to be repeated. | 03-06-2014 |
20140072070 | METHOD OF DATA TRANSMISSION IN MULTIPLE ANTENNA SYSTEM - A method of data transmission includes determining the number of layers, generating mapping symbols by mapping modulation symbols for a first codeword and modulation symbols for a second codeword to each layer, and transmitting the mapping symbols through a plurality of antennas. At least one of the first codeword and the second codeword is mapped to at least 3 layers and the number of layers is larger than 3. | 03-13-2014 |
20140086358 | METHOD AND APPARATUS FOR INFORMATION TRANSMISSION IN A RADIO COMMUNICATION SYSTEM - A method of transmitting, by a transmitter, information in a wireless communication system, the method includes generating first and second symbols; generating first and second transmit vectors on the basis of an Alamouti code from the first and second symbols; and transmitting the first transmit vector through a first antenna and transmitting the second transmit vector through a second antenna. The first transmit vector consists of a first transmit symbol and a second transmit symbol. The second transmit vector consists of a third transmit symbol and a fourth transmit symbol. The first, second, third, and fourth transmit symbols are transmitted based on first and second resource indexes. The first symbol is a first modulation symbol for first information, and the second symbol is a second modulation symbol for second information. | 03-27-2014 |
20140092850 | METHOD OF TRANSMITTING CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM - A method of transmitting control information in a wireless communication system is provided. The method includes configuring downlink control information including a plurality of information fields according to a format of scheduling for transmission of a single codeword in a spatial multiplexing mode, wherein the plurality of information fields include a precoding matrix indicator (PMI) confirmation filed for indicating whether precoding is performed on downlink data by using a PMI reported by a user equipment and a transmitted precoding matrix indicator (TPMI) information field for indicating a codebook index, and at least one of the PMI confirmation field and the TPMI information field indicates an offset value of power for the downlink data transmission or interference information for the downlink data transmission, and transmitting the downlink control information. | 04-03-2014 |
20140105147 | METHOD FOR TRANSMITTING DOWNLINK CONTROL CHANNEL IN A MOBILE COMMUNICATIONS SYSTEM AND A METHOD FOR MAPPING THE CONTROL CHANNEL TO PHYSICAL RESOURCE USING BLOCK INTERLEAVER IN A MOBILE COMMUNICATIONS SYSTEM - A method for transmitting a downlink control channel in a mobile communication system and a method for mapping the control channel to physical resources using a block interleaver are provided. In order to transmit a downlink control channel in a mobile communication system, information bits are modulated to generate one or more modulation symbols according to a specific modulation scheme, the modulation symbols are interleaved using a block interleaver, and the interleaved modulated symbols are mapped to resource elements allocated for transmission of at least one control channel in a subframe, thereby transmitting the at least one control channel. | 04-17-2014 |
20140112291 | METHOD AND APPARATUS FOR SELECTING CARRIER IN WIRELESS COMMUNICATION SYSTEM - A method and apparatus for selecting a carrier in a wireless communication system is provided. A pico eNodeB (eNB) transmits a carrier information request message including a request of information on carriers used by a macro eNB, and receives a carrier information response message as a response of the carrier information request message, the carrier information response message including the information on carriers used by the macro eNB, the information on carriers indicating information on user equipments (UEs) corresponding to the carriers used by the macro eNB. The pico eNB selects a primary cell (PCell) of the pico eNB based on the received information on carriers used by the macro eNB. | 04-24-2014 |
20140119297 | METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION IN A WIRELESS COMMUNICATION SYSTEM - A method for transmitting a signal via physical uplink control channel (PUCCH) in a wireless communication system and an apparatus for performing the method are provided. Control information bits are modulated to generate N1 modulation symbols, wherein N1 is twice a number of subcarriers in one resource block (RB). The modulation symbols are spread by using various orthogonal codes to generate a plurality of sequences and the generated plurality of sequences are transmitted using different slots of a subframe through different antenna ports, each sequence of the plurality of sequences being mapped on a corresponding single carrier frequency division multiple access symbol in a corresponding slot. | 05-01-2014 |
20140119323 | METHOD AND APPARATUS FOR ALLOCATING AN UPLINK CARRIER FOR TRANSMITTING UPLINK CONTROL INFORMATION IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and apparatus for allocating an uplink carrier for transmitting uplink control information in a wireless communication system that supports carrier aggregation. According to one embodiment of the present invention, a method for transmitting uplink control information in a wireless communication system that supports carrier aggregation of M (M≧1) uplink component carriers comprises: a step of receiving setup information on a primary uplink component carrier, from among said M uplink component carriers, via which one or more pieces of uplink control information are to be transmitted; a step of multiplexing said one or more pieces of uplink control information; and a step of transmitting the multiplexed uplink control information through the primary uplink component carrier. | 05-01-2014 |
20140120924 | METHOD AND APPARATUS FOR SELECTING CARRIER IN COMMUNICATION SYSTEM - A method and apparatus for selecting a carrier in a wireless communication system is provided. a pico eNodeB (eNB) transmits a carrier information request message including a request of information on carriers used by a macro eNB, receives a carrier information response message as a response of the carrier information request message, the carrier information response message including the information on carriers used by the macro eNB, and selects a primary cell (PCell) of the pico eNB based on the received information on carriers used by the macro eNB. | 05-01-2014 |
20140140327 | METHOD AND DEVICE FOR TRANSMITTING A DOWNLINK REFERENCE SIGNAL IN A WIRELESS COMMUNICATION SYSTEM SUPPORTING MULTIPLE ANTENNAS - A method for a base station to transmit a channel-state-information reference signal for up to 8 antenna ports includes mapping, in accordance with a predetermined pattern, the channel-state-information reference signal for up to 8 antenna ports onto a data region of a downlink subframe having an extended cyclic prefix (CP) structure, and transmitting the downlink subframe onto which the channel-state-information reference signal for up to 8 antenna ports has been mapped; and, in the predetermined pattern, the channel-state-information reference signal for up to 8 antenna ports in mapped onto 2 OFDM symbols on the data region of the downlink subframe, with a definition for mapping onto at least one of 4 subcarrier wave positions in each of the 2 OFDM symbols, and the 4 subcarrier wave positions defined in the predetermined pattern can be disposed at 3 subcarrier wave intervals. | 05-22-2014 |
20140161067 | METHOD AND APPARATUS FOR TRANSMITTING UPLINK CONTROL INFORMATION - A method of transmitting uplink control information of a user equipment is provided. The method includes: generating the uplink control information repeatedly as many as uplink data transmission layers; modulating the uplink control information to generate a plurality of repeated modulation symbol; applying a precoding matrix to the plurality of repeated modulation symbols to generate a plurality of first precoded symbol; and transmitting the plurality of first precoded symbols respectively through a plurality of antennas in an uplink subframe comprising a plurality of single carrier frequency division multiple access (SC-FDMA) symbols in a time domain and a plurality of subcarriers in a frequency domain. | 06-12-2014 |
20140169202 | METHOD OF MEASURING INTERFERENCE - A method of measuring interference to perform efficient data communication is disclosed. A method of measuring interference of neighboring cells comprises allocating one or more first resource elements, to which pilot signals are allocated, to predetermined symbol regions included in a first resource block; allocating one or more second resource elements for measuring interference of the neighboring cells to a first symbol region of the predetermined symbol regions; and measuring interference of the neighboring cells using the one or more second resource elements. | 06-19-2014 |
20140192700 | APPARATUS FOR TRANSMITTING AND RECEIVING DATA IN A WIRELESS COMMUNICATION SYSTEM AND METHOD THEREOF - An apparatus for transmitting and receiving data in a wireless communication system method thereof are disclosed. In a terminal of a wireless communication system, the present invention includes receiving a physical downlink control channel (hereinafter abbreviated PDCCH), receiving a physical downlink shared channel (hereinafter abbreviated PDSCH), and demodulating the PDSCH by interpreting the PDCCH according to a type of a subframe including the PDCCH and the PDSCH. | 07-10-2014 |
20140192720 | METHOD FOR TRANSMITTING AND RECEIVING PAGING INFORMATION IN A BROADBAND WIRELESS ACCESS SYSTEM - A method for efficiently transmitting and receiving a paging message and system information from and in a mobile station of a broadband wireless access system is disclosed. A method for receiving a paging message in a mobile station comprises receiving paging information from a serving base station, the paging information including paging sub group identifier (paging sub group ID) indicating a paging sub group to which the mobile station belongs; and receiving the paging message for a predetermined paging interval of the paging sub group, wherein the paging sub group is determined separately from a paging group and a geographical location determining the paging group, and is maintained while the mobile station is being operated in an idle mode. | 07-10-2014 |
20140192750 | METHOD AND APPARATUS FOR TRANSMITTING REFERENCE SIGNAL IN MULTI-ANTENNA SYSTEM - Provided are a method and apparatus for transmitting a reference signal in a multi-antenna system. A terminal generates a plurality of reference signal sequences to which cyclic shift values different from each other are allocated, generates an orthogonal frequency division multiplexing (OFDM) symbol to which the plurality of reference signal sequences are mapped, and transmits the OFDM symbol to a base station through a plurality of antennas. The respective cyclic shift values allocated to the respective reference signal sequences are determined on the basis of a parameter n indicated by a cyclic shift field transmitted from a physical downlink control channel (PDCCH). | 07-10-2014 |
20140198871 | METHOD AND APPARATUS FOR TRANSMITTING DOWNLINK REFERENCE SIGNAL IN WIRELESS COMMUNICATION SYSTEM THAT SUPPORTS MULTIPLE ANTENNAS - The present invention relates to a wireless communication system, and in particular, to a method and an apparatus for transmitting a downlink reference signal in a wireless communication system that supports multiple antennas. The method for transmitting a reference signal for a maximum of eight antenna ports according to one embodiment of the present invention comprises: in a base station, mapping part of a common reference signal for a maximum of four antenna ports into a downlink subframe that includes a 1 | 07-17-2014 |
20140204887 | METHOD FOR DETECTING CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM - A method for detecting control information in a wireless communication system is provided. The method includes checking a cyclic redundancy check (CRC) error by monitoring control channels, determining whether a value of an error check field is equal to a specific value, and, if the value of the error check field is equal to a specific value, detecting the control information on the control channel. | 07-24-2014 |
20140204888 | METHOD FOR DETECTING CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM - A method for detecting control information in a wireless communication system is provided. The method includes checking a cyclic redundancy check (CRC) error by monitoring control channels, determining whether a value of an error check field is equal to a specific value, and, if the value of the error check field is equal to a specific value, detecting the control information on the control channel. | 07-24-2014 |
20140205035 | METHOD AND APPARATUS FOR TRANSMITTING REFERENCE SIGNAL IN MULTI-ANTENNA SYSTEM - A method for transmitting a reference signal in a multi-antenna system is provided. The method includes: selecting at least one orthogonal frequency division multiplexing (OFDM) symbol in a subframe containing a plurality of OFDM symbols; allocating a channel quality indication reference signal (CQI RS) capable of measuring a channel state for each of a plurality of antennas to the selected at least one OFDM symbol; and transmitting the CQI RS, wherein the CQI RS is allocated to an OFDM symbol which does not overlap with an OFDM symbol to which a common reference signal to be transmitted to all user equipments in a cell or a dedicated reference signal to be transmitted to a specific user equipment in the cell is allocated. | 07-24-2014 |
20140211736 | METHOD AND APPARATUS FOR TRANSMITTING UPLINK REFERENCE SIGNAL IN WIRELESS COMMUNICATION SYSTEM - Provided are a method and an apparatus for transmitting an uplink (UL) reference signal (RS) in a wireless communication system. A first user equipment (UE) served through a macro eNodeB (eNB) generates a first UL RS on the basis of a first indicator and transmits the generated first UL RS. A second UE served through a pico eNB having the same cell identifier (ID) as the macro eNB generates a second UL RS on the basis of a second indicator and transmits the generated second UL RS. The bandwidth to which the first UL RS is transmitted is overlapped with the bandwidth to which the second UL RS is transmitted. | 07-31-2014 |
20140219213 | METHOD AND APPARATUS FOR TRANSMITTING DOWNLINK SIGNAL IN A MIMO WIRELESS COMMUNICATION SYSTEM - A method and apparatus for transmitting a downlink signal in a multiple input multiple output (MIMO) wireless communication system is disclosed. A method for receiving a downlink signal from a base station to a user equipment in a multiple input multiple output (MIMO) system, which supports dual layer transmission based on first and second antenna ports, comprises receiving downlink control information (DCI) through a downlink control channel; and receiving downlink data through a downlink data channel, the downlink data including one or more of a first transport block and a second transport block, wherein the downlink control information includes a new data indicator (NDI) for each of the first and second transport blocks, and if the first transport block is disabled and the second transport block is enabled, the new data indicator for the first transport block indicates an antenna port through which the second transport block is received. | 08-07-2014 |
20140233491 | METHOD FOR TRANSMITTING ACK/NACK SIGNAL IN WIRELESS COMMUNICATION SYSTEM APPLIED CARRIER AGGREGATION AND APPARATUS THEREFOR - A method and apparatus for transmitting ACK/NACK (Acknowledgement/Negative-ACK) state information in a wireless communication system. The method includes receiving, by a user equipment (UE), multiple transmission blocks through multiple downlink component carriers from a base station (BS); and transmitting, by the UE, multiple transmission block ACK/NACK state information through a single uplink component carrier to the BS. The multiple transmission block ACK/NACK state information indicates a number of ACK responses among ACK/NACK responses corresponding to each of the multiple transmission blocks. | 08-21-2014 |
20140241279 | OPERATION OF TERMINAL FOR MULTI-ANTENNA TRANSMISSION - Embodiments of the present invention relate to a method and an apparatus for enabling a terminal to transmit a signal in a wireless communication system. According to one embodiment, a signal transmission method includes: receiving configuration information for multi-antenna transmission from a base station; configuring a multi-antenna transmission mode in accordance with the received configuration information; and transmitting an uplink channel having a plurality of symbols to the base station through multiple antennas. | 08-28-2014 |
20140254492 | METHOD AND DEVICE FOR TRANSMITTING DATA IN WIRELESS COMMUNICATION SYSTEM - Provided are a method and device for transmitting data in a wireless communication system. A user equipment (UE) transmits uplink data, to a base station, via a physical uplink shared channel (PUSCH) corresponding to a random access response grant, in a UE-specific aperiodic SRS subframe. At said time, the PUSCH is assigned to the entire UE-specific aperiodic SRS subframe. | 09-11-2014 |
20140286259 | METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION IN A WIRELESS COMMUNCATION SYSTEM - The present invention relates to a wireless communication system. More specifically, the present invention relates to a method for transmitting control signal via a PUCCH in a wireless communication system, and to an apparatus for the method, wherein the method comprises the following steps: joint-coding a plurality of pieces of control information to obtain a single codeword; obtaining a first modulation symbol sequence from the single codeword; obtaining, from the first modulation symbol sequence, a plurality of second modulation symbol sequences corresponding to each slot in the PUCCH; cyclically shifting the plurality of second modulation symbol sequences in a time domain to obtain a plurality of third modulation symbol sequences; performing a discrete Fourier transform (DFT) preceding process on the plurality of third modulation symbol sequences to obtain a plurality of complex symbol sequences in a frequency domain; and transmitting the plurality of complex symbol sequences via the PUCCH. | 09-25-2014 |
20140286265 | METHOD FOR TRANSMITTING AN UPLINK SIGNAL AND FEEDBACK INFORMATION, AND RELAY APPARATUS USING THE METHOD - The invention relates to a method of transmitting an uplink signal at a communication apparatus in a wireless communication system. The wireless communication system can receive pattern information of downlink subframes for a base station (BS)-to-the communication apparatus transmission as a bitmap; receive resource block (RB) information associated with a control channel for the BS-to-the communication apparatus transmission; receive the control channel from a fourth orthogonal frequency division multiplexing (OFDM) symbol of the downlink subframe n corresponding to a downlink subframe index n based on the RB information and the pattern information, the downlink subframe n comprising at least one downlink subframe other than downlink subframe 0, downlink subframe 4, downlink subframe 5 and downlink subframe 9; receive a data channel in the downlink subframe n; and transmit feedback information associated with the data channel to the BS via an uplink subframe for the communication apparatus-to-the BS transmission. | 09-25-2014 |
20140301321 | METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION IN A WIRELESS COMMUNICATION SYSTEM - A method for transmitting a signal via physical uplink control channel (PUCCH) in a wireless communication system and an apparatus for performing the method are provided. Control information bits are modulated to generate N1 modulation symbols, wherein N1 is twice a number of subcarriers in one resource block (RB). The modulation symbols are spread by using various orthogonal codes to generate a plurality of sequences and the generated plurality of sequences are transmitted using different slots of a subframe through different antenna ports, each sequence of the plurality of sequences being mapped on a corresponding single carrier frequency division multiple access symbol in a corresponding slot. | 10-09-2014 |
20140301496 | SIGNAL TRANSMISSION METHOD AND APPARATUS USING CODEBOOK IN WIRELESS COMMUNICATION SYSTEM SUPPORTING MULTIPLE ANTENNAS - The present invention relates to a method for transmitting, by a base station, a downlink signal using a plurality of transmission antennas comprises the steps of: applying a precoding matrix indicated by the PMI, received from a terminal, in a codebook to a plurality of layers, and transmitting the precoded signal to the terminal through a plurality of transmission antennas. Among precoding matrices included in the codebook, a precoding matrix for even number transmission layers can be a 2×2 matrix containing four matrices (W1s), the matrix (W1) having rows of a number of transmission antennas and columns of half the number of transmission layers, the first and second columns of the first row in the 2×2 matrix being multiplied by 1, the first column of the second row being multiplied by coefficient “a” of a phase, and the first column of the second row being multiplied by “−a”. | 10-09-2014 |
20140314026 | METHOD AND APPARATUS FOR GENERATING AN UPLINK REFERENCE SIGNAL SEQUENCE IN A WIRELESS COMMUNICATION SYSTEM - A method of receiving, by a base station, a reference signal in a wireless communication system. The method includes transmitting a cell-specific sequence group hopping parameter to a plurality of user equipments (UEs) in a cell. The cell-specific sequence group hopping parameter is used to enable a sequence group hopping for the plurality of UEs in the cell. The method further includes transmitting a UE-specific sequence group hopping parameter to a certain UE, among the plurality of UEs. The UE-specific sequence group hopping parameter is used to disable the sequence group hopping, enabled by the cell-specific SGH parameter, for the certain UE. The method further includes receiving a reference signal, which is generated based on a sequence group number, from the certain UE. The sequence group number is determined by the UE-specific sequence group hopping parameter. | 10-23-2014 |
20140321346 | METHOD AND APPARATUS FOR SUPPORTING CARRIER AGGREGATION - The present invention relates to a method and to an apparatus for supporting carrier aggregation. More particularly, the present invention relates to a method for enabling user equipment to receive a signal from a base station in a wireless communication system which supports carrier aggregation, wherein said the method comprises the steps of: setting a first component carrier to a paused state; receiving state change information for the first component carrier via the second component carrier during the paused state of the first component carrier; and monitoring a control channel via the first component carrier if the state change information indicates a predetermined value. The present invention also relates to an apparatus for the method. | 10-30-2014 |
20140328273 | APERIODIC TRANSMISSION METHOD AND APPARTUS FOR SOUNDING REFERENCE SIGNAL IN WIRELESS COMMUNICATION SYSTEM - A method for transmitting, by a user equipment (UE), an aperiodic sounding reference signal (SRS) in a wireless communication system. The method includes receiving, via a physical downlink control channel (PDCCH), downlink control information (DCI) including an SRS request for triggering transmission of an aperiodic SRS, detecting the SRS request, if a carrier indicator field (CIF) is configured, transmitting the aperiodic SRS on a uplink (UL) component carrier (CC), among a plurality of UL CCs, corresponding to the CIF, and if a CIF is not configured, transmitting the aperiodic SRS on a UL CC, among the plurality of UL CCs, in which a physical uplink shared channel (PUSCH) is scheduled by the DCI. | 11-06-2014 |
20140328281 | EFFECTIVE METHOD AND DEVICE FOR TRANSMITTING CONTROL INFORMATION FOR SUPPORTING UPLINK MULTI-ANTENNA TRANSMISSION - Disclosed is a method for transmitting control information on uplink multi-antenna transmission from a base station and the method includes: transmitting DCI that schedules uplink transmission of a first data block and a second data block through a PDCCH; receiving the first and second data blocks scheduled by the DCI; transmitting information indicating ACK or NACK for the received first and second data blocks, respectively, by using a first PHICH for the first data block and a second PHICH resource for the second data block; receiving a retransmission for a negative-acknowledged data block; and transmitting information indicating ACK or NACK of the retransmission of the negative-acknowledged data block by using the first PHICH resource when the number of negative-acknowledged data blocks is not identical to the number of data blocks that the PDCCH indicates. | 11-06-2014 |
20140334376 | APPARATUS FOR TRANSMITTING AND RECEIVING CONTROL INFORMATION AND SYSTEM INFORMATION FOR REPEATERS AND METHOD THEREOF - A method of transmitting control information for a relay node (RN) from an eNode B in a wireless communication system includes transmitting information on a resource region of at least one relay-physical downlink control channel (R-PDCCH) including the control information for the RN and interleaving mode information on an interleaving mode applied to the at least one R-PDCCH to the RN, wherein the resource region of the at least one R-PDCCH is RN-specifically configured. | 11-13-2014 |
20140334453 | METHOD AND APPARATUS FOR TRANSMITTING DOWNLINK REFERENCE SIGNAL IN WIRELESS COMMUNICATION SYSTEM THAT SUPPORTS MULTIPLE ANTENNAS - A method for transmitting a channel status information reference signals (CSI-RSs) for a maximum of eight antenna ports includes mapping the CSI-RSs for a maximum of eight antenna ports onto a data region of a downlink subframe having a normal cyclic prefix (CP) configuration according to a predetermined pattern; and transmitting the downlink subframe to which the CSI-RSs mapped, wherein the predetermined pattern defines the CSI-RSs to be mapped onto two OFDM symbols of the data region in the downlink subframe and mapped to at least one of four subcarrier positions in each of the two OFDM symbols, and wherein the four subcarrier positions defined by the predetermined pattern may be two consecutive subcarrier positions and two other consecutive subcarrier positions spaced apart by four subcarriers. | 11-13-2014 |
20140334460 | METHOD AND APPARATUS FOR TRANSMITTING REFERENCE SIGNALS IN UPLINK MULTIPLE INPUT MULTIPLE OUTPUT (MIMO) TRANSMISSION - The present invention relates to a wireless communication system, and more particularly, to a method and an apparatus for transmitting reference signals in uplink MIMO transmission. According to one embodiment of the present invention, the method for transmitting uplink signals through a terminal in the wireless communication system comprises the steps of: receiving control information including the information on a cyclic shift and/or an orthogonal cover code; allocating the multiplexed reference signals onto an uplink subframe; and transmitting the subframe through a multi-antenna. When the uplink MIMO transmission is multiuser MIMO transmission, the reference signals of the terminal and the reference signals of other terminals can be multiplexed by using the orthogonal cover code. | 11-13-2014 |
20140341096 | EFFICIENT CONTROL INFORMATION TRANSMISSION METHOD AND APPARATUS FOR SUPPORTING MULTIPLE ANTENNA TRANSMISSION TECHNIQUE - The present invention relates to a wireless communication system and provides an efficient control information transmission method and apparatus for supporting a multiple antenna transmission technique. A method is provided for transmitting downlink hybrid automatic repeat request (HARQ) information related to an uplink multiple codeword transmission and includes receiving the uplink multiple codeword transmission, generating HARQ information related to each of the multiple codewords based on a result of decoding each of the multiple codewords, modulating the HARQ information, and transmitting the modulated HARQ information via one or more physical HARQ indicator channels (PHICHs). | 11-20-2014 |
20140355515 | METHOD AND APPARATUS FOR TRANSMITTING REFERENCE SIGNAL IN WIRELESS COMMUNICATION SYSTEM INCLUDING RELAY STATION - A method and an apparatus for demodulating a downlink control channel by a relay node (RN) in a wireless communication system. The method includes receiving cell-specific reference signals on at least one antenna port from a base station (BS); receiving user equipment (UE)-specific reference signals on at least one antenna port from the BS; and demodulating a relay physical downlink control channel (R-PDCCH) based on either the cell-specific reference signals or the UE-specific reference signals. A type of reference signals used to demodulate the R-PDCCH is configured by higher layers. | 12-04-2014 |
20140355545 | CHANNEL-SOUNDING METHOD USING A PLURALITY OF ANTENNAS, AND APPARATUS FOR SAME - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and to an apparatus for transmitting an SRS in a multi-antenna system. The method comprises the steps of: acquiring specific information for discriminating a first antenna group and a second antenna group from among a plurality of antennas, wherein said first antenna group includes one or more antennas which are set to a turned-on state to perform communication with a base station, and said second antenna group includes one or more other antennas which are set to a turned-off state; transmitting an SRS to the base station if a predetermined condition is satisfied, under the condition that the second antenna group is set to the turned-off state; and setting the second antenna group to a turned-off state after the transmission of the SRS. | 12-04-2014 |
20140355546 | APERIODIC TRANSMISSION METHOD AND APPARATUS FOR SOUNDING REFERENCE SIGNAL IN WIRELESS COMMUNICATION SYSTEM - A method for transmitting, by a user equipment (UE), an aperiodic sounding reference signal (SRS) in a wireless communication system, the method including receiving, via a physical downlink control channel (PDCCH), downlink control information (DCI) for downlink scheduling. The DCI includes an SRS request for triggering transmission of the aperiodic SRS. The method further includes detecting the SRS request; and transmitting the aperiodic SRS on an uplink (UL) component carrier (CC), which is linked to a downlink (DL) CC in which a physical downlink shared channel (PDSCH) is scheduled by the DCI, among a plurality of UL CCs. If a carrier indicator field (CIF) is configured, the UL CC is indicated by the CIF. | 12-04-2014 |
20140355555 | METHOD AND DEVICE FOR TRANSMITTING UPLINK CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM - Disclosed are a method and a device for transmitting uplink control information (UCI) by a terminal in a wireless communication system. The UCI transmission method comprises the steps of: generating an encoding information bit stream by performing channel coding for a UCI bit stream; generating complex modulation symbols by performing modulation for the generated encoding information bit stream; spreading the complex modulation symbols in block-wise on the basis of an orthogonal sequence; and transmitting the spread complex modulation symbols to a base station. The encoding information bit stream is generated by a channel coding for circularly repeating the UCI bit stream. | 12-04-2014 |
20140362804 | METHOD AND APPARATUS FOR THE TRANSMISSION OF A CONTROL SIGNAL IN A RADIO COMMUNICATION SYSTEM - The present invention provides a method and an apparatus for the transmission of control signal in a radio communication system. The method includes the steps of processing first control information on the basis of a first resource index to create a first control signal, processing second control information on the basis of a second resource index to create a second control signal, and transmitting the first control signal and the second control signal. | 12-11-2014 |
20140362812 | METHOD AND APPARATUS FOR EFFICIENTLY TRANSMITTING CONTROL INFORMATION TO SUPPORT UPLINK MULTIPLE ANTENNA TRANSMISSION - The present invention relates to a method for transmitting control information regarding uplink multiple antenna transmission may comprise the steps of: transmitting DCI for scheduling the uplink transmission of a plurality of data blocks through a PDCCH; receiving the plurality of data blocks scheduled by the DCI; transmitting information which indicates positive acknowledgement or negative acknowledgement to each of the plurality of received data blocks through the PHICH; and receiving retransmission for the negative acknowledged data blocks. When the number of the negative-acknowledged data blocks is not equal to the number data blocks indicated in the PDCCH, a pre-coding matrix, which is for the number of transmission layers equivalent to that of layers corresponding to the negative-acknowledged data blocks, may be used for retransmission. | 12-11-2014 |
20140362815 | METHOD FOR TRANSMITTING ACK/NACK SIGNAL IN WIRELESS COMMUNICATION SYSTEM APPLIED CARRIER AGGREGATION AND APPARATUS THEREFOR - A method for transmitting Acknowledgement/Negative-Acknowledgement (ACK/NACK) state information in a wireless communication system, the method including receiving, by a user equipment (UE), multiple transmission blocks through multiple downlink component carriers from a base station (BS); transmitting, by the UE, multiple transmission block ACK/NACK state information through a single uplink component carrier to the BS. The multiple transmission block ACK/NACK state information indicates at least two different numbers of ACK responses among ACK/NACK responses corresponding to each of the multiple transmission blocks. | 12-11-2014 |
20140376397 | METHOD FOR DETERMINING POSITION OF USER EQUIPMENT AND APPARATUS FOR PERFORMING SAME IN WIRELESS MOBILE COMMUNICATION SYSTEM - The present invention relates to a method for determining position of a user equipment in a wireless mobile communication system. The method comprises receiving a plurality of subframes including reference signals for positioning of the user equipment from a plurality of base stations periodically with a predetermined period of time; and determining position of the user equipment using reference signal time difference (RSTD) between the reference signals for positioning of the user equipment included in the received plurality of subframes, wherein a pattern of the reference signals for positioning of the user equipment is generated by repeating a diagonal mother matrix with dimension of 6×6, the pattern of the reference signals are mapped to orthogonal frequency division multiplexing (OFDM) symbols of the subframe, and the reference signals for positioning of the user equipment in a OFDM symbol in which common reference signal (CRS) is transmitted are punctured. | 12-25-2014 |
20140376498 | METHOD FOR MULTIPLEXING DATA AND CONTROL INFORMATION - A method for multiplexing a data information stream, including a systematic symbol and a non-systematic symbol, and a control information stream of at least three types in a wireless mobile communication system is disclosed. The method includes mapping the data information stream to a resource area so that the systematic symbol is not mapped to a specific resource area to which the control information stream is mapped, and mapping the control information stream to the specific resource area. | 12-25-2014 |
20150023286 | METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION IN A WIRELESS COMMUNICATION - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method for transmitting acknowledgement/negative ACK (ACK/NACK) in a wireless communication system which supports carrier aggregation, and to an apparatus for the method. A method in which a terminal transmits ACK/NACK in a wireless communication system that supports carrier aggregation comprises the following steps: receiving one or more physical downlink shared channels (PDSCHs); and transmitting ACK/NACK for said one or more PDSCHs via a physical uplink control channel (PUCCH). A PUCCH format for transmitting ACK/NACK is selected by taking the type of the carrier in which said one or more PDSCHs are received into account. | 01-22-2015 |
20150036639 | METHOD OF TRANSMITTING UPLINK CONTROL SIGNALS IN WIRELESS COMMUNICATION SYSTEM - A method and device are disclosed for transmitting uplink control signals in a wireless communication system using at least one subframe comprising two slots, each slot including a plurality of symbols, the wireless communication system configured to transmit a first uplink control signal via an assigned first physical uplink control channel resource and to transmit a second uplink control signal via an assigned second physical uplink control channel resource. The method can include generating a modulation symbol by modulating the second uplink control signal, and transmitting the modulation symbol in a subframe via a physical uplink control channel resource which is assigned for the first uplink control signal if it is determined that the first uplink control signal and the second uplink control signal are to be transmitted in the subframe. | 02-05-2015 |
20150043513 | METHOD AND APPARATUS FOR TRANSMITTING A REFERENCE SIGNAL IN A MULTI-ANTENNA SYSTEM - A method for transmitting, by a user equipment (UE), a demodulation reference signal (DMRS) for a physical uplink shared channel (PUSCH) in a wireless communication system, can include generating a plurality of P DMRS sequences associated with a plurality of P layers respectively, wherein a plurality of P cyclic shifts are allocated to the P DMRS sequences respectively, mapping the plurality of P DMRS sequences to resource elements (REs), and transmitting the plurality of P DMRS sequences to a base station, wherein the plurality of P cyclic shifts are determined based on first and second values, which are indicated by a cyclic shift field in downlink control information (DCI), received through a physical downlink control channel (PDCCH). | 02-12-2015 |
20150049718 | METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION IN A WIRELESS COMMUNICATION SYSTEM - A method for transmitting control information via a PUCCH in a wireless communication system and an apparatus for performing the method are provided, the method including joint-coding a plurality of pieces of control information to obtain a single code word; obtaining a first modulated symbol sequence from the single code word; obtaining a plurality of second modulated symbol sequences corresponding to each slot in the PUCCH from the first modulated symbol sequence; cyclically shifting the plurality of second modulated symbol sequences in a time domain to obtain a plurality of third modulated symbol sequences; performing a Discrete Fourier Transform (DFT) precoding process on the plurality of third modulated symbol sequences to obtain a plurality of complex symbol sequences in a frequency domain; and transmitting the plurality of complex symbol sequences via the PUCCH. | 02-19-2015 |
20150055603 | METHOD FOR TRANSMITTING SUB-FRAME DESIGNATION INFORMATION TO A DOWNLINK IN A RADIO COMMUNICATION SYSTEM - A method of transmitting subframe designating information in downlink in a wireless communication system is disclosed. The present invention includes generating the subframe designating information for designating a subframe of a specific type in a radio frame and transmitting the generated subframe designating information to a user equipment, wherein the subframe designating information includes initial location information indicating an initial location of the subframe of the specific type on the radio frame and period information indicating a period for the subframe of the specific type to be repeated. | 02-26-2015 |
20150063485 | DATA TRANSMISSION DEVICE AND METHOD IN A WIRELESS COMMUNICATIONS SYSTEM - The present invention provides a data transmission device and method in a wireless communication system. The device comprises a processor which is connected with the M antennas and which is formed so as to generate data to be transmitted through the M antennas, on the basis of a precoding matrix; the precoding matrix is generated based on a plurality of matrices; and a first matrix, which is one matrix among the plurality of matrices, is selected from within a codebook for N antennas (where N03-05-2015 | |
20150078320 | METHOD FOR TRANSMITTING CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREFOR - A method for receiving Acknowledgement/Negative Acknowledgement (ACK/NACK) information at a base station in a wireless communication system. The method according to one embodiment includes transmitting a plurality of transport blocks through a plurality of downlink carriers to a user equipment. Each of the plurality of downlink carriers carries two or more transport blocks. The method according to the embodiment further includes, after transmitting the plurality of transport blocks, receiving the ACK/NACK information through one uplink carrier from the user equipment. The ACK/NACK information includes ACK/NACK bits corresponding to the plurality of transport blocks, and the ACK/NACK bits are concatenated in accordance with an index order of the downlink carriers and an index order of the two or more transport blocks associated with each of the downlink carriers. | 03-19-2015 |
20150078322 | METHOD FOR TRANSMITTING CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREFOR - A method for generating Acknowledgement/Negative Acknowledgement (ACK/NACK) information at a user equipment in a wireless communication system. The method according to one embodiment includes receiving a plurality of transport blocks through a plurality of downlink carriers from a base station. Each of the plurality of downlink carriers carries two or more transport blocks. The method according to the embodiment further includes generating the ACK/NACK information by concatenating ACK/NACK bits corresponding to the plurality of transport blocks. The ACK/NACK bits are concatenated using an index order of the downlink carriers and an index order of the two or more transport blocks associated with each of the downlink carriers. The index order of the downlink carriers is used firstly. | 03-19-2015 |
20150078324 | OPERATION OF TERMINAL FOR MULTI-ANTENNA TRANSMISSION - Embodiments of the present invention relate to a method and an apparatus for enabling a terminal to transmit a signal in a wireless communication system. According to one embodiment, a signal transmission method includes: receiving configuration information for multi-antenna transmission from a base station; configuring a multi-antenna transmission mode in accordance with the received configuration information; and transmitting an uplink channel having a plurality of symbols to the base station through multiple antennas. | 03-19-2015 |
20150078345 | METHOD AND APPARATUS FOR TRANSMITTING DOWNLINK REFERENCE SIGNAL IN WIRELESS COMMUNICATION SYSTEM THAT SUPPORTS MULTIPLE ANTENNAS - A method for transmitting reference signals for eight or fewer antenna ports includes mapping a portion of common reference signals (CRSs) for four or fewer antenna ports into a downlink subframe including 1 | 03-19-2015 |
20150085742 | METHOD AND APPARATUS FOR CONFIGURING A TRANSMISSION MODE FOR A BACKHAUL LINK TRANSMISSION - A method and a base station are described for transmitting a signal. The base station transmits control information to a relay node through a relay-physical downlink control channel (R-PDCCH), and transmits a data to the relay node through a relay-physical downlink shared channel (R-PDSCH). When a number of transmission layers of the R-PDSCH is 2 or more than 2, reference signals, among a plurality of reference signals, transmitted by a specific one of a plurality of antenna ports are used, in the relay node, for a demodulation of the control information. | 03-26-2015 |
20150085822 | TRANSMISSION METHOD AND DEVICE FOR A DOWNLINK REFERENCE SIGNAL - The present invention relates a method in which a base station transmits a downlink signal by using a plurality of layers comprises the steps of: multiplexing and transmitting dedicated reference signals for the plurality of layers on the basis of a reference signal pattern, wherein 24 resource element positions comprised in the reference signal pattern are set as 6 groups, the 6 groups are set as 2 high-level groups, the reference signal for the plurality of layer is split and placed in the 2 high-level groups, and the reference signal for 2 or more layers placed in the same group is subjected to code-division multiplexing. | 03-26-2015 |