Patent application number | Description | Published |
20120057519 | METHOD FOR TRANSMITTING CONTROL SIGNAL TO RELAY NODE AT BASE STATION IN MIMO WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREFOR - A method for transmitting a control signal to a relay node at a base station in a multi-input multi-output (MIMO) wireless communication system is disclosed. The method comprises configuring relay-resource element groups (R-REGs) in a unit of four resource elements (REs) contiguous in the ascending order of subcarrier indexes, except for resource elements for a reference signal (RS); allocating transmission resources to the control signal in a unit of the relay-resource element group; and transmitting the control signal to the relay node by using the allocated transmission resources, wherein the resource elements for the reference signal include resource elements for channel state information-RS (CSI-RS), which include resource elements for a channel state information RS to which a transmission power of 0 is allocated. | 03-08-2012 |
20120287875 | METHOD AND APPARATUS FOR PROVIDING CHANNEL STATE INFORMATION-REFERENCE SIGNAL (CSI-RS) CONFIGURATION INFORMATION IN A WIRELESS COMMUNICATION SYSTEM SUPPORTING MULTIPLE ANTENNAS - A method and apparatus for transmitting and receiving a Channel State Information-Reference Signal (CSI-RS) in a wireless communication system supporting multiple antennas are disclosed. The method includes transmitting, at a base station, information of one or more CSI-RS configurations to a mobile station, wherein the one or more CSI-RS configurations include one CSI-RS configuration for which the mobile station assumes non-zero transmission power for CSI-RS, transmitting, at the base station, information indicating a CSI-RS configuration for which the mobile station assumes zero transmission power for the CSI-RS among the one or more CSI-RS configurations to the mobile station, mapping, at the base station, CSI-RSs to resource elements of a downlink subframe based on the one or more CSI-RS configurations, and transmitting, at the base station, the downlink subframe mapped with the CSI-RSs to the mobile station. | 11-15-2012 |
20120320816 | METHOD AND APPARATUS FOR DETERMINING SIZE OF TRANSPORT BLOCK TRANSMITTED BY BASE STATION TO RELAY NODE IN RADIO COMMUNICATION SYSTEM - A method for receiving a Relay node dedicated Physical Downlink Shared Channel (R-PDSCH) from a base station by a relay node in a radio communication system is disclosed. The method includes receiving, from the base station, a Modulation and Coding Scheme (MCS) index and the number NR-PDSCHPRB1 of first resource blocks to which the R-PDSCH is transmitted, under the assumption that a Relay node dedicated Physical Downlink Control Channel (R-PDCCH) is not transmitted, estimating the number NR-PDSCHPRB2 of second resource blocks to which the R-PDSCH is actually transmitted, using the number NR-PDSCHPRB1 of the first resource blocks and using the number NR-PDCCHPRB of resource blocks to which the R-PDCCH is transmitted, selecting the size of a transport block mapped to the R-PDSCH, using the number NR-PDSCHPRB2 of the second resource blocks and using a transport block index corresponding to the MCS index, and decoding the R-PDSCH, using the size of the transport block and using a modulation order corresponding to the MCS index. | 12-20-2012 |
20120327884 | APPARATUS FOR TRANSMITTING AN UPLINK SIGNAL AND METHOD THEREOF - An apparatus for transmitting an uplink signal and method thereof are disclosed, by which an uplink signal can be efficiently transmitted in a wireless communication system. The present invention includes receiving a downlink control information (DCI) used for PUSCH (physical uplink shared channel) scheduling, the DCI including an information for resource block allocation, an information for a channel status information request and a plurality of MCS (modulation and coding scheme) informations for a plurality of transport blocks and if a condition is met, transmitting a channel status information only on the PUSCH without a transport block for UL-SCH (uplink shared channel). Moreover, the condition includes a case that: only one transport block is enabled, the MCS information for the enabled transport block indicates an MCS index 29, the information for the channel status information request indicates 1, and the number of allocated resource blocks is equal to or smaller than 4. | 12-27-2012 |
20130010682 | METHOD AND DEVICE FOR RECEIVING DOWNLINK SIGNAL - The present invention relates to A METHOD AND A DEVICE FOR RECEIVING A DOWNLINK SIGNAL IN A WIRELESS COMMUNICATION SYSTEM. More specifically, the method of the present invention comprises the following steps: receiving first control information for downlink scheduling in the first slot of a resource block pair, wherein the first control information includes allocation information on at least one resource unit; receiving a data in the second slot of the resource block pair, when the allocation information on the resource unit having the resource block pair with the first control information has a first value; and attempting to detect second control information for uplink scheduling in the second slot of the resource block pair, when the allocation information on the resource unit having the resource block pair with the first control information has a second value. | 01-10-2013 |
20130010685 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING R-PDCCH - A method and apparatus for transmitting and receiving a Relay Physical Downlink Control Channel (R-PDCCH) being a control channel for a relay node (RN) in a wireless communication system are disclosed. To transmit an R-PDCCH to a RN, a BS includes a processor for interleaving a predetermined number of Control Channel Elements (CCEs), mapping the interleaved CCEs to at least one Virtual Resource Block (VRB) configured for R-PDCCH transmission, mapping the at least one VRB to at least one Physical Resource Block (PRB), and a transmitter for transmitting the R-PDCCH to the RN through the at least one PRB. | 01-10-2013 |
20130033998 | METHOD AND APPARATUS FOR MEASUREMENT FOR INTER-CELL INTERFERENCE COORDINATION IN RADIO COMMUNICATION SYSTEM - A wireless communication system and, more specifically, a measurement method and apparatus for inter-cell interference coordination in a wireless communication system are disclosed. Herein, a method for supporting measurement of a User Equipment (UE) by a first base station in a wireless communication system includes the steps of acquiring information of downlink subframe configuration of a second base station, determining measurement objects of downlink resource of the first base station based on the downlink subframe configuration of the second base station; transmitting information of the measurement objects to the UE, and receiving measurement result for the measurement objects from the UE. | 02-07-2013 |
20130034072 | METHOD AND DEVICE FOR RECEIVING DOWNLINK SIGNAL - The present invention relates to a method and a device for receiving a downlink control signal in a wireless communication system. More specifically, the present invention relates to a device and a method for receiving control information, the method comprising the following steps: receiving a subframe which includes two slots; executing a blind decoding for a first control channel in the control channel search region within a first slot; decoding a second control channel using a specific resource within a second slot when the first control channel has been detected; and executing a blind decoding for the second control channel in the control channel search region within the second slot when the first control channel has not been detected. | 02-07-2013 |
20130039254 | METHOD FOR BACKHAUL SUBFRAME SETTING BETWEEN A BASE STATION AND A RELAY NODE IN A WIRELESS COMMUNICATION SYSTEM AND A DEVICE THEREFOR - Disclosed is a method whereby a relay node receives a signal from a base station in a wireless communication system. More specifically, the invention comprises: a step in which a relay node receives, from the base station, a request signal for changing the size of a downlink physical control channel transmitted to a terminal corresponding to the relay node; a step in which a signal in response to the request signal is sent to the base station; a step of setting a downlink available symbol between the base station and the relay node, based on the request signal; and a step in which a relay node specific signal, sent from the base station, is received from the downlink available symbol. | 02-14-2013 |
20130039326 | ADAPTIVE FEEDBACK FOR MULTI-CELL COOPERATIVE COMMUNICATION AND AN ADAPTIVE TRANSMISSION MODE DETERMINING METHOD AND DEVICE - The present description relates to a method of using a terminal to adaptively feed back channel information relating to multi-cell cooperative communication includes: measuring an average signal-to-noise ratio of a virtual multi-antenna channel between a terminal and at least one cell to transmit same to a base station; receiving, from a base station, a number of allowable feedback bits determined on the basis of the average signal-to-noise ratio and cooperative communication information; selecting a codebook from a plurality of predetermined codebooks on the basis of the number of allowable feedback bits and the cooperative communication information; and quantizing channel information on a virtual multi-antenna channel using the selected codebook, and transmitting feedback information including the quantized channel information to a base station. The codebook may be selected to transmit the feedback information using the entire number of allowable feedback bits. | 02-14-2013 |
20130044712 | METHOD FOR TRANSCEIVING SIGNALS BETWEEN A BASE STATION AND A RELAY NODE IN A WIRELESS COMMUNICATION SYSTEM, AND APPARATUS FOR SAME - The present application relates to a method in which a relay node receives control signals from a base station in a wireless communication system. More particularly, the method comprises: a step of receiving, from the base station, a relay-node-dedicated physical downlink control channel (R-PDCCH) via a specific subframe; and a step of performing a blind decoding process on the physical downlink control channel to detect control information for the relay node, wherein said specific subframe includes a first slot and a second slot, and the size of a relay-node-dedicated control channel element (R-CCE) for performing the blind decoding process is individually defined depending on the number of reference signals contained in the first slot and in the second slot. | 02-21-2013 |
20130051275 | METHOD AND APPARATUS FOR TRANSMITTING CHANNEL STATUS INFORMATION IN MULTI-CARRIER WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more particularly, to a method and apparatus for transmitting channel status information (CSI) in a wireless communication system which supports multiple carriers. According to one embodiment of the present invention, a method for transmitting channel status information for multiple carriers comprises the steps of: measuring downlink channels for first and second carriers which are closely placed to each other on the frequency domain; determining channel status information for the first carrier on the basis of a result of the channel measurement for the first carrier; determining channel status information for the second carrier on the basis of a part of the channel status information for the first carrier and a result of the channel measurement for the second carrier; and transmitting channel status information for the first and second carriers. | 02-28-2013 |
20130058307 | METHOD AND DEVICE FOR TRANSMITTING/RECEIVING CHANNEL STATE INFORMATION IN COORDINATED MULTIPOINT COMMUNICATION SYSTEM - The present invention relates to a wireless communication system. More particularly, disclosed are a method and a device for transmitting channel state information in a coordinated multipoint communication system. The method for transmitting channel state information from a terminal to multiple base stations, according to one embodiment of the present invention, comprise the steps of: transmitting the CSI including long-term broadband PMI and short-term sub-band PMI to a first base station; transmitting the CSI including the long-term broadband PMI and not including the short-term sub-band PMI to a second base station; and transmitting the CSI including the short-term sub-band PMI to the second base station, when a request for the short-term sub-band PMI transmission to the second base station is received. | 03-07-2013 |
20130077543 | METHOD FOR PERFORMING A HARQ PROCESS AND APPARATUS USING SAME - The present description relates to a method for performing a HARQ process operation in a wireless communication system and to an apparatus using the method. A base station device which performs a HARQ process operation comprises a transmitter which transmits to a relay an uplink (UL) grant in a downlink backhaul subframe n which is a subframe having an index n among the allocated downlink backhaul subframes, and transmits, if downlink data sent from the relay in accordance with the uplink grant is not successfully received, a non-acknowledgement (NACK) signal in a downlink backhaul subframe n+N which is a downlink backhaul subframe that comes after N which is a predetermined number of HARQ processes counted from the downlink backhaul subframe n among the allocated downlink backhaul subframes. | 03-28-2013 |
20130078913 | METHOD OF TERMINAL TRANSMITTING SOUNDING REFERENCE SIGNAL ON THE BASIS OF APERIODIC SOUNDING REFERENCE SIGNAL TRIGGERING AND METHOD FOR CONTROLLING UPLINK TRANSMISSION POWER TO TRANSMIT APERIODIC SOUNDING REFERENCE SIGNAL - The method of the terminal transmitting the SRS on the basis of the aperiodic SRS triggering according to the present invention comprises the steps of: receiving a plurality of aperiodic SRS configuration information from the base station; receiving an aperiodic SRS transmission triggering indicator from the base station; selecting the specific aperiodic SRS configuration information among the plurality of aperiodic SRS configuration information on the basis of at least one among a sub-frame index for receiving the aperiodic SRS transmission triggering indicator, a time relation between the aperiodic SRS transmission sub-frames, and an uplink channel state; and transmitting an aperiodic SRS for the aperiodic SRS transmission triggering indicator on the basis of the selected aperiodic SRS configuration information, the plurality of aperiodic SRS configuration information including the information about a resource for transmitting the aperiodic SRS corresponding to the aperiodic SRS transmission triggering indicator. In addition, according to the present invention, the terminal can be used for receiving a power offset value for transmitting the aperiodic SRS from the base station and determining a transmission power value for transmitting the aperiodic SRS. | 03-28-2013 |
20130083719 | METHOD FOR REPORTING A CHANNEL QUALITY INDICATOR BY A RELAY NODE IN A WIRELESS COMMUNICATION SYSTEM, AND APPARATUS FOR SAME - The present invention relates to a method for reporting a channel quality indicator for a relay node-dedicated physical downlink shared channel (R-PDSCH) from a base station by a relay node in a wireless communication system. More particularly, the method comprises the following steps: receiving one or more reference signals from the base station; calculating a channel quality indicator for the R-PDSCH on the basis of one or more reference signals; and reporting the channel quality indicator to the base station. | 04-04-2013 |
20130088985 | METHOD FOR MEASURING A NEIGHBORING CELL AND AN APPARATUS THEREOF - A method of performing intra-frequency cell measurement by a user equipment (UE) in a wireless communication system is disclosed. The method includes determining a measurement gap for the intra-frequency cell measurement based on downlink control information received from an eNB, and performing the intra-frequency cell measurement for a neighboring cell during the measurement gap. The measurement gap corresponds to one or more downlink subframes other than a downlink subframe having downlink data for the UE indicated by the downlink control information. | 04-11-2013 |
20130107920 | METHOD AND DEVICE FOR TRANSMITTING/RECEIVING A SIGNAL BY USING A CODE BOOK IN A WIRELESS COMMUNICATION SYSTEM | 05-02-2013 |
20130114539 | METHOD AND APPARATUS FOR RECEIVING DOWNLINK SIGNALS - The present invention relates to a method and apparatus for receiving downlink signals in a wireless communication system. More specifically, the present invention relates to a method for receiving downlink signals in a wireless communication and an apparatus incorporating the same, wherein the method comprises the steps of: receiving a sub frame having two slots; blind decoding a plurality of R-PDCCH (Relay Physical Downlink Control Channel) candidates in order to receive control data from the search space of a first slot; and determining whether the R-PDCCH conveys control data for downlink transmission or uplink transmission when R-PDCCH was detected in the search space, wherein the control data for the downlink transmission and uplink transmission have an equal size of data. | 05-09-2013 |
20130114562 | METHOD AND APPARATUS FOR CONTROLLING UPLINK TRANSMISSION POWER IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method for transmitting uplink transmission power control information by a base station in a wireless communication system, the method comprising: transmitting first transmission power control information, which is applied to a first uplink resource set, to a user equipment; transmitting second transmission power control information, which is applied to a second uplink resource set, to the user equipment; receiving an uplink signal, which is transmitted through one or more uplink resources of the first uplink resource set using uplink transmission power which is based on the first transmission power control information, from the user equipment; and receiving an uplink signal, which is transmitted through one or more uplink resources of the second uplink resource set using uplink transmission power which is based on the second transmission power control information, from the user equipment. | 05-09-2013 |
20130129014 | Method and Device for Sending and Receiving Precoded Signals on a Wireless Communication System - The present invention relates to a method for transmitting a precoded signal, the method comprising: determining a precoding matrix on the basis of the first matrix, which is determined from a first codebook including precoding matrices indicated by a first precoding matrix index (PMI), and the second matrix, which is determined from a second codebook including precoding matrices indicated by a second PMI; and transmitting the precoded signal using the determined precoding matrix to the receiver, wherein each precoding matrix contained in the first codebook is comprised of a block diagonal matrix, and individual blocks of the block diagonal matrix are configured independently of each other, and each precoding matrix contained in the second codebook is comprised of an upper element and a lower element, where the lower element includes a phase rotation value. | 05-23-2013 |
20130148622 | METHOD AND DEVICE FOR RELAY NODE RETRANSMITTING BACKHAUL UPLINK TO BASE STATION IN A WIRELESS COMMUNICATION SYSTEM - The present invention discloses a method for a relay node configuring a backhaul uplink hybrid automatic repeat and request (HARQ) process in a wireless communication system. More particularly, the present invention comprises the following steps: receiving from a base station a backhaul downlink subframe pattern and a HARQ process offset value; allocating a backhaul uplink subframes, based on the backhaul downlink subframe pattern excluding the subframe which is set to an access downlink subframe; applying the HARQ process offset value to the number of HARQ processes corresponding to the backhaul downlink subframe pattern; and configuring HARQ process identifiers to the allocated backhaul uplink subframes, wherein each of the configured HARQ process identifiers have a predetermined roundtrip time (RTT) value. | 06-13-2013 |
20130176887 | METHOD OF REDUCING INTERCELL INTERFERENCE IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREOF - A method for transmitting a downlink signal through coordinated beamforming with a neighboring cell at a serving cell includes transmitting first subframe information for designating one or more subframes to the neighboring cell, transmitting first Precoding Matrix Index (PMI) restriction related information including one or more PMIs to a User Equipment (UE) of the serving cell, the PMIs forming a beam so that interference affecting the neighboring cell in the one or more subframes has a constant characteristic, receiving first Channel State Information (CSI) reporting measured in the one or more subframes based on the first PMI restriction related information from the UE of the serving cell, and transmitting a downlink signal to the UE of the serving cell based on the first CSI reporting, the neighboring cell receiving CSI reporting corresponding to the neighboring cell, measured by the UE of the neighboring cell in the one or more subframes. | 07-11-2013 |
20130176933 | METHOD OF PERFORMING RESOURCE SPECIFIC CHANNEL ESTIMATION IN HETEROGENEOUS NETWORK SYSTEM AND APPARATUS THEREOF - A method for performing resource specific channel estimation at a user equipment in a wireless communication system is disclosed. The method includes receiving one or more reference signals in a specific subframe from a serving cell, and performing channel estimation for a control region of a corresponding downlink subframe, based on the one or more reference signals. The channel estimation for the control region is performed based on one or more reference signals included in a data region of the corresponding downlink subframe. | 07-11-2013 |
20130195006 | METHOD OF TRANSMITTING CONTROL INFORMATION AND DEVICE FOR SAME - The present invention relates to a wireless communication system. In more detail, in relation to an uplink transmission method, the present invention relates to a method which includes: generating a signal for uplink transmission; transmitting the signal by using a subframe #n; if the subframe #n and a subframe #n+1 are subframes for respectively different links, not transmitting the signal in the last symbol of the subframe #n; and if the subframe #n and the subframe #n+1 are subframes for the same link, transmitting the signal by using the last symbol of the subframe #n, and to a device for same. | 08-01-2013 |
20130208692 | METHOD AND APPARATUS FOR TRANSMITTING ACK/NACK FOR DOWNLINK TRANSMISSION IN WIRELESS COMMUNICATION SYSTEM - A wireless communication system and a method and apparatus for transmitting ACK/NACK for downlink transmission in a wireless communication system are disclosed. The method for transmitting ACK/NACK information for a downlink transmission in a receiver of a wireless communication system includes being configured with N physical uplink control channel (PUCCH) resources respectively having indexes 0, 1, 2, . . . , and N−1 by a higher layer, receiving the downlink transmission from a transmitter in a downlink subframe set including M (108-15-2013 | |
20130223258 | INTER-CELL INTERFERENCE COORDINATION IN A WIRELESS COMMUNICATION SYSTEM - Disclosed herein is a wireless communication system. More particularly, disclosed herein is a method and apparatus for coordinating and reducing inter-cell interference in a wireless communication system. A method of transmitting channel state information (CSI) measurement resource information by a base station includes determining first and second subframe sets, in which CSI measurement will be performed, among a plurality of downlink subframes, transmitting information indicating the first and second subframe sets to a terminal, and receiving the CSI of each of the first and second subframe sets from the terminal. A subframe belonging to the first subframe set and a subframe belonging to the second subframe set do not overlap, and some of the plurality of subframes do not belong to either of the first and second subframe sets. | 08-29-2013 |
20130223400 | METHOD AND DEVICE FOR TRANSMITTING AND RECEIVING DOWNLINK CONTROL CHANNEL FOR CONTROLLING INTER-CELL INTERFERENCE IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more particularly, to a method and device for transmitting and receiving a downlink control channel for controlling inter-cell interference in a wireless communication system. An embodiment of the present invention provides a method for transmitting a downlink control channel from a base station to a terminal, and the method may comprise: a step of determining whether a downlink subframe is of a first type or a second type; and a step in which if the downlink subframe is of the first type, the number of OFDM symbols for transmitting the downlink control channel is set to a preset value (N), and the downlink control channel is transmitted using N OFDM symbols. | 08-29-2013 |
20130225188 | METHOD AND DEVICE FOR MEASURING A DOWNLINK IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more particularly, to a method and device for measuring a downlink in a wireless communication system. According to the present invention, provided is a method for properly and accurately measuring a downlink when an inter-cell interference adjustment is applied. | 08-29-2013 |
20130230013 | METHOD AND APPARATUS FOR TRANSMITTING A CONTROL CHANNEL AND A DATA CHANNEL IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more particularly, to a method and apparatus for transmitting a control channel in a wireless communication system that supports multi-cell cooperative communication. According to the present invention, a scheme for protecting a control channel and a data channel of one cell from interference caused by another cell is provided. | 09-05-2013 |
20130235756 | METHOD AND DEVICE FOR APERIODICALLY REPORTING CHANNEL STATE INFORMATION IN WIRELESS CONNECTION SYSTEM - The present invention relates to methods and devices for aperiodically reporting channel state information (CSI). According to an embodiment of the present invention, a method for aperiodically reporting channel state information may comprise: a terminal receiving an upper layer signal from a base station, the upper layer signal containing information about at least one allocated CSI measurement group; the terminal receiving a physical downlink control channel (PDCCH) signal via a first subframe from the base station, the PDCCH signal containing a CSI request field; the terminal setting a second subframe as a CSI reference resource based on the first subframe; and determining whether at least one CSI measurement group to which a CSI reference resource is allocated is included. | 09-12-2013 |
20130235839 | METHOD AND APPARATUS FOR TRANSCEIVING A DOWNLINK CONTROL CHANNEL IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more particularly, to a method and apparatus for transceiving a downlink control channel. According to one embodiment of the present invention, a method in which a receiver receives a downlink control channel from a transmitter in a wireless communication system comprises: a step of assuming an overhead of a transmitted reference signal in a data region of a downlink subframe; and a step of decoding the downlink control channel transmitted by the transmitter in the data region on the basis of the assumption of the overhead of the reference signal, wherein the assumption of the overhead of the reference signal is determined on the basis of at least the number of receiving antennas of the receiver. | 09-12-2013 |
20130242853 | METHOD AND DEVICE FOR TRANSMITTING AND RECEIVING DATA IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method and device for transmitting and receiving data in a wireless communication system. Specifically, the method comprises: a step in which a relay node receives a relay physical downlink control channel (R-PDCCH) including indication information relating to at least one piece of information about a second antenna port and a second scramble ID from a base station by using information about a first antenna port and a first scramble ID; and a step in which the relay node receives a downlink data channel from the base station, wherein the downlink data channel comprises a first downlink data channel region assigned to a portion of a resource block pair to which the relay physical downlink control channel is assigned, and a second downlink data channel region assigned to the other portion of the resource block pair to which the relay physical downlink control channel is assigned, wherein the first downlink data channel region is received using the first antenna and the first scramble ID, and the second downlink data channel region is received using the indication information. | 09-19-2013 |
20130242921 | METHOD AND DEVICE FOR FEEDING BACK PRECODING MATRIX INDICATOR USING INTERPOLATION - The present invention relates to a method and a device for feeding back a channel through precoding matrix indicator (PMI) interpolation. As one embodiment of the present invention, a method for feeding back a precoding matrix indicator (PMI) in a CoMP environment comprises the steps of: allowing a terminal to perform PMI interpolation by using PMIs that are included in the PMI window; allowing the terminal to select an optimum PMI by comparing the interpolated PMIs with a channel state of a current channel; and allowing the terminal to feed back the optimum PMI to a base station. | 09-19-2013 |
20130260779 | METHOD FOR REPORTING CHANNEL STATE INFORMATION IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREFOR - The present application relates to a method for enabling a terminal to transmit channel status information in a wireless communication system. Specifically, the method for enabling the terminal to transmit the channel status information in the wireless communication system includes the steps of: receiving a reference signal from a serving cell or an adjacent cell; determining the priority of the predetermined precoding matrix index (PMI) based on the reference signal; and transmitting the PMI together with a stacking flag to the serving cell according to the priority, wherein the number of PMI to be transmitted to the serving cell is determined based on a size of a buffer commonly set in the serving cell and the terminal, and the stacking flag indicates storing the PMI into the buffer or initializing the buffer. | 10-03-2013 |
20130272158 | METHOD OF CONTROLLING UPLINK TRANSMISSION POWER AT UE IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREOF - A method of determining uplink transmission power at a user equipment (UE) in a wireless communication system is disclosed. The method includes receiving channel status information-reference signal (CSI-RS) settings and downlink transmission power values for a plurality of transmission points (TPs) from a higher layer, receiving CSI-RSs from the plurality of TPs, estimating path loss values corresponding to the plurality of TPs based on the received CSI-RSs, determining the uplink transmission power using the estimated path loss values, and transmitting an uplink signal to one or more of the plurality of TPs based upon the determined uplink transmission power. | 10-17-2013 |
20130272189 | METHOD FOR TRANSMITTING UPLINK CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREFOR - The present invention relates to a method for allocating a resource which enables a relay node to transmit uplink control information to a base station in a wireless communication system. Specifically, the method for allocating the resource include the steps of: generating a control information sequence for a backhaul downlink sub-frame between a relay node and a base station; setting symbols for mapping the control information sequence when a plurality of symbols are punctured at a front end or a rear end of a backhaul uplink sub-frame between the relay node and the base station; and performing the time-first-mapping for the control information sequence with respect to resource elements corresponding to the set symbols in a descending order of sub-carrier indexes. | 10-17-2013 |
20130279356 | METHODS FOR MEASURING AND TRANSMITTING DOWNLINK SIGNALS AND APPARATUSES THEREFOR - A method in which a User Equipment (UE) measures a downlink signal in a wireless communication system is disclosed. The method includes receiving information about a Beam Direction Pattern (BDP) of the downlink signal and measuring the downlink signal based on the information about the BDP. The information about the BDP includes an index of a subframe in which the downlink signal is to be transmitted using a specific BDP and includes an identifier (ID) of the specific BDP. The BDP of the downlink signal is switched according to the subframe index based on the information about the BDP. | 10-24-2013 |
20130279422 | INTERFERENCE ALIGNMENT METHOD AND DEVICE IN CELLULAR NETWORK - According to one aspect of the present invention, the present invention provides a method for allowing a base station, which receives signals from one or more terminals, to align receiving signals and interference signals in a wireless access system. Said method comprises the steps of: receiving the receiving signals and the interference signals, wherein said receiving signals are signals which are received from terminals that belong to a serving cell of said base station, and said interference signals are signals which are received from terminals that belong to neighbor cells of said base station; dividing a signal space for receiving said receiving signals and said interference signals into one or more signal spaces of size N; and arranging K receiving signals of said receiving signals in each of said divided signal spaces, wherein said K receiving signals arranged in each of said divided signal spaces are orthogonal to each other. | 10-24-2013 |
20130279424 | METHOD FOR A TERMINAL TO TRANSMIT CHANNEL STATE INFORMATION TO A BASE STATION IN A RADIO COMMUNICATION SYSTEM, AND DEVICE FOR SAME - A method for a terminal to allocate a resource for transmitting uplink control information to a serving base station (BS) in a radio communication system includes when a report of at least one periodic RI and a report of at least one aperiodic RI occur in the same subframe, mapping the at least one periodic RI and the at least one aperiodic RI into a physical uplink shared channel of the subframe and transmitting the mapped at least one periodic RI and at least one aperiodic RI to the serving BS. The at least one aperiodic RI may correspond to at least one component carrier wave in each of the serving BS and an adjacent BS for CoMP transmission of the serving BS and the adjacent BS, and the at least one periodic RI may correspond to at least one component carrier wave for non-CoMP transmission in the serving BS. | 10-24-2013 |
20130279455 | METHOD FOR REPORTING CHANNEL STATE INFORMATION IN A WIRELESS COMMUNICATION SYSTEM, AND APPARATUS THEREFOR - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and apparatus for reporting channel state information, wherein the method comprises the following steps: receiving configuration information for periodically reporting channel state information; and periodically reporting the channel state information for a each of a plurality of periods based on the configuration information, wherein the channel state information is repeated so as to have a predetermined pattern based on periods, of which a second period is longer than a first period. The second period has a first value in a single transmission point operation mode. The second period has a sum of the first value and a second value which is proportional to the number of coordinated transmission points involved in a coordinated multi-point transmission operation in a coordinated multi-point transmission operation mode. | 10-24-2013 |
20130279632 | METHOD OF MODULATING SIGNAL FOR DATA COMMUNICATION AND DEVICE THEROF - The present invention relates to a method for modulating a signal, which is a signal modulation method for data communication, and the method comprises the steps of: forming a data symbol sequence to which a symbol 0 having the overall length of N are added, by adding M−1 symbols 0 to each symbol of a data symbol sequence; performing an N-point fast Fourier transform for the data symbol sequence to which said symbols 0 are added; performing precoding for said fast-Fourier-transformed data symbol sequence; and forming a final transmission symbol sequence by performing an inverse fast Fourier transform for said precoded data symbol sequence. Further, the present invention relates to a transmitter which comprises: a symbol adding unit that forms a data symbol sequence to which the symbol 0 having the overall length of N is added, by adding M−1 symbols 0 to each symbol of a data symbol sequence; a fast Fourier transform unit that performs an N-point fast Fourier transform for the data symbol sequence to which said symbols 0 are added; a precoding unit that performs precoding for said fast-Fourier-transformed data symbol sequence; and an inverse fast Fourier transform unit that forms a final transmission symbol sequence by performing an inverse fast Fourier transform for said precoded data symbol sequence. | 10-24-2013 |
20130286906 | METHOD FOR SIGNALING A SUBFRAME PATTERN FOR PREVENTING INTER-CELL INTERFERENCE FROM OCCURRING IN HETEROGENEOUS NETWORK SYSTEM AND APPARATUS FOR THE SAME - A method for setting an almost blank subframe (ABS) pattern in a base station of a wireless communication system is disclosed. The method comprises receiving an ABS bitmap pattern from a neighboring base station; setting the ABS pattern of the base station by repeating the ABS bitmap pattern within a previously set number of radio frames; receiving an offset value indicating an application start point of an updated ABS bitmap pattern and an application start of the updated ABS bitmap pattern from the neighboring base station; and setting the ABS pattern of the base station by repeating the updated ABS bitmap pattern from a start subframe of a specific radio frame indicated by the offset value. | 10-31-2013 |
20130286931 | METHOD AND DEVICE FOR TRANSMITTING AN UPLINK SIGNAL FROM A RELAY NODE TO A BASE STATION IN A WIRELESS COMMUNICATION SYSTEM - The present application discloses a method for transmitting an uplink signal from a relay node to a base station in a wireless communication system. In detail, the method comprises the steps of: setting backhaul uplink subframes on the basis of a plurality of pieces of subframe setting information received from the base station; and transmitting the uplink signal to the base station on the basis of an uplink grant in a particular backhaul uplink subframe among the set backhaul uplink subframes, wherein the uplink grant is received at a backhaul downlink subframe which exists within a preset period of time (T) from the particular backhaul uplink subframe, and the backhaul downlink subframes is not an access downlink subframe. | 10-31-2013 |
20130287064 | METHOD AND DEVICE FOR TRANSMITTING/RECEIVING DOWNLINK REFERENCE SIGNAL IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and discloses a method and a device for transmitting/receiving a downlink reference signal in a wireless communication system. The present invention provides a way for maintaining orthogonality of a reference signal between cells in a multi-cell operation. | 10-31-2013 |
20130294332 | METHOD FOR SETTING SEARCH SPACE FOR RELAY NODE IN WIRELESS COMMUNCATION SYSTEM AND DEVICE THEREFOR - Disclosed in the present invention is a method for a relay node to receive a control signal from a base station in a wireless communication system. More particularly, the present invention comprises the steps of: receiving a downlink signal from the base station; and obtaining control information for the relay node by blind-decoding the downlink signal, wherein a search space for blind decoding is located in the data region of a subframe, and is divided into a search space for a downlink grant and a search space for an uplink grant. When the subframe corresponding to the control information for the relay node is a downlink (DL) standalone, the search area including only the search space for the downlink grant, or the search area for the uplink grant being set as an invalid search space would be desirable. | 11-07-2013 |
20130294352 | METHOD OF TRANSMITTING AND RECEIVING CHANNEL STATUS INFORMATION ON MULTI-CELL OPERATION IN A WIRELESS COMMUNICATION SYSTEM AND APPARATUS FOR THE SAME - The present invention relates to a wireless communication system. And, a method of transmitting and receiving channel status information on a multi-cell operation in a wireless communication system and apparatus for the same are disclosed. The present invention may include determining a report type of channel status information on multi-cell operation and transmitting/receiving the channel status information corresponding to the determined channel status information report type via uplink data channel. | 11-07-2013 |
20130294393 | METHOD FOR REPORTING CHANNEL STATE INFORMATION IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREFOR - The present invention relates to a method for enabling a terminal to report channel state information in a wireless communication system for supporting coordinated multi point (CoMP) transmission. Specifically, the method for enabling the terminal to report the channel state information in the wireless communication system for supporting CoMP transmission includes the steps of: receiving a reference signal from a serving cell and one or more cooperated cells; forming the channel state information for the CoMP transmission on the basis of the reference signal; and reporting the channel state information through a physical uplink shared channel to the serving cell, wherein the channel state information includes channel quality indicator (CQI) information and precoding matrix index (PMI) information, and the CQI information includes a wideband CQI and a CQI for each selected sub-band of the CoMP transmission. | 11-07-2013 |
20130301465 | METHOD AND DEVICE FOR SETTING CHANNEL STATUS INFORMATION MEASURING RESOURCE IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more specifically, discloses a method and a device for setting a channel status information (CSI) measuring resource in a wireless communication system. The present invention provides a way to transmit/receive the CSI more accurately and efficiently by setting a virtual reference resource for measuring the CSI. | 11-14-2013 |
20130301597 | METHOD FOR TRANSMITTING AND RECEIVING DOWNLINK CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM AND DEVICE THEREFOR - Disclosed is a method for allowing a terminal to receive a downlink signal from a base station in a wireless communication system. More specifically, the method comprises the steps of: receiving a first control channel which indicates the location information of a resource allocated to a second control channel; receiving the second control channel, on the basis of a control format indicator contained in the first control channel; and obtaining a downlink grant and/or an uplink grant contained in the second control channel, wherein the second control channel is allocated with the resource contained in a data region of a specific subframe. | 11-14-2013 |
20130315186 | METHOD FOR TRANSMITTING CONTROL CHANNEL IN MULTICELL COOPERATIVE WIRELESS COMMUNICATION SYSTEM AND DEVICE THEREFOR - Disclosed is a method for transmitting a control channel in a multicell cooperative wireless communication system. More particularly, the present invention comprises the steps of: a 1 | 11-28-2013 |
20130322324 | METHOD FOR SETTING SEARCH SPACE FOR HANDOVER OF RELAY NODE IN WIRELESS COMMUNICATION SYSTEM, AND DEVICE THEREFOR - Disclosed in the present invention is a method for a relay to execute a random access procedure in a wireless communication system. More particularly, the present invention comprises the steps of: transmitting a random access preamble to a target cell; receiving a downlink signal from the target cell; obtaining a relay node-physical downlink control channel (R-PDCCH) by blind decoding the downlink signal; and receiving a random access response message on the basis of the R-PDCCH, wherein a search space for the blind decoding is located in a data region of a subframe, and information on the search space is delivered from the target cell to a serving cell of the relay node, and then signaled to the relay node. | 12-05-2013 |
20130324109 | METHOD FOR REPORTING CHANNEL STATE INFORMATION IN A MULTI-CELL COOPERATIVE WIRELESS COMMUNICATION SYSTEM, AND APPARATUS THEREFOR - The present invention relates to a method for a terminal to transmit channel state information in a multi-cell cooperative wireless communication system. Particularly, the method comprises the steps of: determining a precoding matrix index (PMI) for a serving cell from among a plurality of PMIs; structuring PMI information for a cooperative cell based on the PMI for the serving cell; and transmitting the PMI for the serving cell and the PMI information for the cooperative cell to the serving cell, wherein a plurality of the PMIs are divided into a plurality of PMI subsets, PMIs included by the respective PMI subsets are vertically placed, and the PMI information for the cooperative cell comprises a first indicator indicating at least one of a plurality of the PMI subsets to a PMI subset for the cooperative cell, and a second indicator indicating at least one of the PMIs in the indicated PMI subset to the PMI for the cooperative cell. | 12-05-2013 |
20130329612 | METHOD AND DEVICE FOR CONTROLLING INTERFERENCE BETWEEN CELLS IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and a device for a serving cell to control the interference between cells in a time division duplex (TDD) wireless communication system, the method comprising the steps of: transmitting to a neighbor cell subframe allocation information for indicating one or more uplink (UL) subframes; and limiting UL transmission activity in the one or more of the UL subframes. | 12-12-2013 |
20130329711 | METHOD AND DEVICE FOR COMMUNICATION BETWEEN TERMINALS IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more particularly, to a method and device for communication between terminals in a wireless communication system. According to the present invention, a resource configuration method, a channel configuration method, a transmission power control method, etc. for communication between terminals can be provided. | 12-12-2013 |
20140003250 | METHOD FOR COMMUNICATION CONSIDERING INTERFERENCE BETWEEN CELLS IN A WIRELESS COMMUNICATION SYSTEM AND DEVICE THEREFOR | 01-02-2014 |
20140011468 | METHOD FOR RECEIVING RADIO SIGNAL AND DEVICE THEREFOR - A method for receiving a radio signal by a receiver including a 2-dimensional antenna array which consists of a plurality of antenna elements in a wireless communication system includes: dividing the plurality of antenna elements into a plurality of groups; determining a group-specific reception beam for each of the plurality of groups; applying the group-specific reception beam to a channel corresponding to each of the plurality of groups to acquire virtual channels respectively corresponding to the plurality of groups; and estimating channels respectively corresponding to the plurality of groups based on reference signals received through the virtual channels. | 01-09-2014 |
20140016497 | CSI-RS BASED CHANNEL ESTIMATING METHOD IN A WIRELESS COMMUNICATION SYSTEM AND DEVICE FOR SAME - The present invention relates to a user equipment to perform an estimation operation in a wireless communication system. In more detail, the method includes: receiving configuration information of CSI-RSs (channel status information-reference signals) defined by a plurality of antenna ports from a base station; combining CSI-RSs defined by specific antenna ports among the plurality of antenna ports; and performing the measurement based on the combined CSI-RSs. Here, performing the measurement comprises measuring at least one of a RSRP (reference signal received power), a RSRQ (reference signal received quality) and a pathloss based on the combined CSI-RSs. | 01-16-2014 |
20140029516 | METHOD AND APPARATUS FOR SIMULTANEOUSLY PERFORMING FREQUENCY RESOURCE SENSING AND DATA TRANSMISSION IN A WIRELESS COMMUNICATION SYSTEM - A method and apparatus for simultaneously performing frequency resource sensing and data transmission in a wireless communication system are disclosed. The method for performing frequency band sensing or data transmission and reception at a pico Base Station (BS) within the coverage of a macro BS in a wireless communication system includes determining the number of (M | 01-30-2014 |
20140064237 | METHOD AND DEVICE FOR TERMINAL TO EXECUTE UPLINK HARQ OPERATION IN WIRELESS COMMUNICATION SYSTEM - Disclosed in the present invention is a method for a terminal to receive an acknowledgement/negative-ACK (ACK/NACK) from a base station in a wireless communication system. More specifically, the method comprises the steps of receiving from the base station, through a first carrier wave, scheduling information on uplink data to be transmitted through a second carrier wave, transmitting the uplink data to the base station through the second carrier wave, and receiving an ACK/NACK signal for the uplink data from the base station, in one specific subframe from the first carrier wave or the second carrier wave. | 03-06-2014 |
20140071931 | METHOD AND DEVICE FOR TRANSMITTING CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system and, more particularly, to a method and a device for transmitting control information. The wireless communication system supports carrier aggregation (CA). One aspect of the present invention relates to a method for a base station to receive information from a terminal in a wireless communication system, and comprises the steps of: dividing the entire bandwidth used by one or more serving cells configured in the base station and the terminal, into predetermined frequency units; carrying out a carrier sensing operation for each of the plurality of bandwidths divided in the predetermined frequency units; and when the result of the carrier sensing operation for a first bandwidth from the plurality of divided bandwidths is maintained idle for a predetermined time or longer, transmitting first information to the terminal using the first bandwidth; and receiving from the terminal, second information on a second cell (SCell) related to the first information from the one or more serving cells. | 03-13-2014 |
20140079012 | METHOD FOR TRANSMITTING SIGNAL USING PLURALITY OF ANTENNA PORTS AND TRANSMISSION END APPARATUS FOR SAME - The present invention relates to wireless communication, and more particularly, to a method for transmitting a signal using a plurality of antenna ports and a transmission end apparatus for same. According to a method for a transmission end transmitting the signal in a multi-input multi-output (MIMO) wireless communication system of the present invention, a step of transmitting instruction information on a first channel transmission method to a reception end, and a step of transmitting the first channel to the reception end using a resource region are comprised, wherein the first channel is either an advanced-physical downlink control channel (A-PDCCH) or a relay-physical downlink control channel (R-PDCCH), the first channel is not transmitted when at least a portion of the resource region overlaps with a resource region used for transmitting a second channel, and wherein the second channel can be periodically transmitted using a predetermined portion of the resource region. | 03-20-2014 |
20140079015 | MULTIPLEXING METHOD FOR SIGNALS RELATED TO A PLURALITY OF TERMINALS IN A WIRELESS COMMUNICATION SYSTEM APPLYING CARRIER AGGREGATION TECHNIQUES AND APPARATUS THEREFOR - The present description discloses a method for transmitting an uplink signal through a non-licensed band from a terminal in a wireless communication system by applying carrier aggregation techniques. More specifically, the method is characterized by comprising the steps of: receiving an uplink scheduling grant from a base station; determining the availability of a non-licensed band; transmitting a signal for reserving resources if a non-licensed band is available; and transmitting an uplink signal to the base station via the non-licensed band on the basis of the uplink scheduling grant. | 03-20-2014 |
20140098779 | METHOD FOR A TERMINAL TO RECEIVE A DOWNLINK SIGNAL IN A COOPERATIVE BASE STATION WIRELESS COMMUNICATION SYSTEM AND DEVICE FOR SAME - The present invention relates to a method for a terminal to receive a downlink signal from a plurality of base stations in a wireless communication system. More particularly, the method comprises the steps of: receiving downlink scheduling information from a first base station; and using the downlink scheduling information in order to receive downlink data signals from the first base station and at least one second base station. the downlink data signals received from each of the first base station and the at least one second base station are received through the same frequency band. | 04-10-2014 |
20140098780 | METHOD FOR TRANSMITTING UPLINK CONTROL INFORMATION AND USER EQUIPMENT, AND METHOD FOR RECEIVING UPLINK CONTROL INFORMATION AND BASE STATION - The present invention provides a method and apparatus for uplink transmission/reception of at least one slot in a sub-frame comprising two slots. A base station transmits information which controls the slot performing the uplink transmission among the two slots, to user equipment, and the user equipment performs uplink transmission from the slot directed by the information. When the user equipment transmits ACK/NACK information, the ACK/NACK information is transmitted from the first slot of the user equipment if the CCE associated with the first slot is the CCE included in the PDCCH of the user equipment, and the ACK/NACK information is transmitted from the second slot if the CCE is the CCE associated with the second slot. | 04-10-2014 |
20140105155 | METHOD FOR TRANSMITTING UPLINK CONTROL INFORMATION, USER EQUIPMENT, METHOD FOR RECEIVING UPLINK CONTROL INFORMATION, AND BASE STATION - In the present invention, a user equipment-specific offset information for indicating first physical uplink control channel (PUCCH) resources, which can be used for transmitting ACK/NACK related to a physical downlink control channel (PDCCH) that is transmitted from a data region of a downlink subframe, is provided to a user equipment by means of a base station. The user equipment, which receives the PDCCH from the data region of the downlink subframe, decides the PUCCH resource, based on offset information and an index of the resource that is included in the PDCCH, and transmits ACK/NACK information that corresponds to the PDCCH to the base station using the PUCCH resource. | 04-17-2014 |
20140112216 | METHOD AND APPARATUS FOR CONTROLLING INTER-CELL INTERFERENCE IN WIRELESS COMMUNICATION SYSTEM - The present invention pertains to a wireless communication system, and more particularly, to a method for transmitting an uplink (UL) signal in a time division duplex (TDD) wireless communication system and an apparatus therefor, and the method comprises the following steps: receiving information limiting UL transmission activity from a serving cell; and transmitting a UL subframe in consideration of the information, wherein signal transmission of specific time-frequency resources corresponding to the information in the UL subframe is limited. | 04-24-2014 |
20140112312 | METHOD FOR TRANSMITTING SIGNAL USING PLURALITY OF CODEWORDS IN WIRELESS COMMUNICATION SYSTEM AND TRANSMISSION END FOR SAME - A method for transmitting a signal using a plurality of codewords in a wireless communication system and a transmission end for same are disclosed. The method for the transmission end transmitting the signal using the plurality of codewords, according to the present invention, comprises the following steps: mapping a first codeword on at least one layer from a first layer group and mapping a second codeword on at least one layer from a second layer group, when transmitting a rank of at least five; and transmitting the codewords which are mapped on the first and second layer groups, wherein each of the first layer group and the second layer group can include four layers. | 04-24-2014 |
20140119275 | METHOD FOR TRANSMITTING SIGNAL USING PLURALITY OF ANTENNA PORTS AND TRANSMISSION END APPARATUS FOR SAME - A method for transmitting a signal by using a plurality of antenna ports and a transmission end apparatus for same are disclosed. A method for transmitting the signal using the plurality of antenna ports, according to the present invention, comprises the following steps: transmitting a control channel to a reception end through a first antenna using a first resource domain; and transmitting a data channel to the reception end through the plurality of antenna ports including first antenna port using a second resource domain, wherein the second resource domain and the first resource domain have identical time domains but different frequency domains, and wherein from the time and frequency domains that belong to the first resource domain, the data channel is not transmitted through at least one antenna port from the antenna ports excluding the first antenna port. | 05-01-2014 |
20140119301 | SIGNAL TRANSMISSION AND RECEPTION METHOD USING RANDOM BEAMFORMING IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREFOR - A method for transmitting a signal to a user equipment by a base station in a wireless communication system is disclosed. The method includes receiving information about a preferred beamforming vector in a first subframe from the user equipment, selecting a first random beamformer corresponding to the first subframe from a beamforming vector set for the first subframe, using the information about the preferred beamforming vector, transmitting a downlink signal to the user equipment in the first subframe using the first random beamformer, selecting a second random beamformer corresponding to a second subframe, using the first random beamformer, and transmitting a downlink signal to the user equipment in the second subframe using the second random beamformer. | 05-01-2014 |
20140119332 | INTERFERENCE CONTROL METHOD IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS FOR THE SAME - A method for an eNB to control inter-cell interference in a wireless communication system includes receiving information on a plurality of time-domain interference patterns corresponding to sub-frequency-domain interference control information on a plurality of sub-frequency domains constituting a system frequency domain, the plurality of time-domain interference control patterns indicating interference control for subframes of the plurality of sub-frequency domains, and transmitting, to a UE, scheduling information about the UE based on information on at least one of the plurality of time-domain interference control patterns, wherein each of the plurality of time-domain interference control patterns is configured to have more subframes for which transmission power restriction is set (referred to as “transmission power-restricted subframes” hereinafter) as an inter-cell interference level indicated by the sub-frequency-domain interference control information increases. | 05-01-2014 |
20140126512 | METHOD AND APPARATUS FOR TRANSCEIVING A DOWNLINK HARQ IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more particularly, to a method and apparatus for transceiving a downlink hybrid automatic repeat (HARQ). According to one embodiment of the present invention, a method for setting an HARQ process by a terminal in a wireless communication system may comprise the steps of: receiving, from a base station, limited-resource information indicating a resource the use of which for downlink transmission to the terminal is limited; determining an HARQ process to be activated on the basis of the limited-source information; and performing an HARQ operation for the downlink transmission by means of the HARQ process to be activated. | 05-08-2014 |
20140133425 | METHOD AND APPARATUS FOR SIGNAL TRANSCEIVING IN WIRELESS COMMUNICATION SYSTEM - An embodiment of the present invention is a method for receiving a signal from a plurality of transmission points in a wireless communication system, the method for receiving a signal comprising the steps of: blind decoding a first search space of a subframe received from a first transmission point; and blind decoding a second search space of a subframe received from a second transmission point, wherein the combination of the first search space and the second search space is equivalent to a search space that results when a signal is received from only one transmission point from among the plurality of transmission points. | 05-15-2014 |
20140133427 | METHOD FOR TRANSMITTING OR RECEIVING PDCCH AND USER EQUIPMENT OR BASE STATION FOR THE METHOD - A method for receiving a physical downlink control channel (PDCCH) at a downlink subframe through a user equipment (UE) in a wireless communication system comprises the step of detecting the PDCCH by performing blind decoding for a search space including a plurality of PDCCH candidates included in the downlink subframe, wherein the blind decoding is performed in accordance with order of priority given to each of a plurality of sub-search spaces constituting the search space. | 05-15-2014 |
20140140273 | METHOD AND APPARATUS FOR TRANSCEIVING AN UPLINK HARQ IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more particularly, to a method and apparatus for transceiving an uplink hybrid automatic repeat request (HARQ). According to one embodiment of the present invention, a method for performing a HARQ operation in a terminal of a wireless communication system comprises the steps of: receiving, in a subframe n, an uplink grant message for first uplink data from a base station; determining a first HARQ process from among a plurality of HARQ processes associated with the subframe n; and transmitting, in a subframe n+k, the first uplink data to the base station through the first HARQ process. | 05-22-2014 |
20140140337 | METHOD FOR ACQUIRING TIME SYNCHRONIZATION IN A HETEROGENEOUS NETWORK AND APPARATUS FOR THE SAME - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method for acquiring time synchronization in a wireless communication system, and to an apparatus for the method, wherein the method comprises the steps of: obtaining information on a discontinuous transmission pattern of a synchronous channel; attempting detection of a synchronous channel of a base station; and, if said detection fails, continuously attempting detection of the synchronous channel of the base station during a predetermined time period. If the base station is of a first type, said predetermined time period is set to be the same as or longer than the time period in which the synchronous channel is continuously not transmitted in said discontinuous transmission pattern. If the base station is of a second type, said predetermined time period is set to be the same as or longer than the time period in which the synchronous channel is continuously transmitted in said discontinuous transmission pattern. | 05-22-2014 |
20140161092 | METHOD FOR BASE STATION TRANSMITTING DOWNLINK CONTROL CHANNEL IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS FOR SAME - In the present invention, a method for a base station transmitting a downlink channel is disclosed. More particularly, the method comprises the steps of: dividing each of one or more resources blocks, which are allocated for the downlink control channel, into a predetermined number of subsets; deciding the number of subsets that comprise a resource allocation basic unit for the downlink control channel, based on a start symbol and/or an end symbol of the downlink control channel; mapping a transmission resource on the downlink control channel as the resource allocation basic unit comprising the predetermined number of subsets; and transmitting the downlink control channel by using the transmission resource that is mapped. | 06-12-2014 |
20140169316 | METHOD AND APPARATUS FOR SIGNAL TRANSCEIVING IN WIRELESS COMMUNICATION SYSTEM - An embodiment of the present invention is a method for a terminal to transmit a signal in a wireless communication system, the method for signal transmission comprising the steps of: determining a resource index for the transmission of a physical uplink control channel (PUCCH); and transmitting the PUCCH to any one transmission point among a plurality of transmission points, wherein the transmission point which is to receive the PUCCH is determined on the basis of where the resource index belongs among n number of parts of uplink bandwidths. | 06-19-2014 |
20140169345 | METHOD AND APPARATUS FOR ACQUIRING SYNCHRONIZATION IN RADIO COMMUNICATION SYSTEM - A method for acquiring synchronization by a user equipment (UE) in a radio communication system is disclosed. The method includes receiving a synchronization signal from a first transmission point, and acquiring synchronization to a second transmission point using the synchronization signal and information including a subframe offset received from the first transmission point, wherein the subframe offset is a subframe difference value between the first transmission point and the second transmission point. | 06-19-2014 |
20140185483 | METHOD AND APPARATUS FOR MEASURING INTERFERENCE IN WIRELESS COMMUNICATION SYSTEM - A method and apparatus for measuring inter-cell measurement in a wireless communication system are discussed. The method includes: receiving information regarding a predetermined resource region to which a sounding signal allocated for user equipments (UEs) connected to base stations (BSs) contained in the same coordinated cluster is transmitted, the sounding signal being used to detect a UE causing inter-cell interference; determining whether transmission of the sounding signal is granted for a serving UE in the predetermined resource region; and if transmission of the sounding signal is granted, transmitting a transmission grant message of the sounding signal to the serving UE, wherein whether the sounding signal transmission is granted is determined based on a random number, or is determined based on information of an available resource region of each BS if information regarding the available resource region of each BS is received with the information regarding the predetermined resource region. | 07-03-2014 |
20140192672 | METHOD AND APPARATUS FOR REPORTING A MEASUREMENT IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method for reporting a measurement by a terminal, comprising the steps of: measuring the magnitude of a signal from a first transmission point; and measuring the magnitude of a signal from a second transmission point. The measurements of the magnitudes of the signals from each transmission point are performed using a channel state information reference signal. | 07-10-2014 |
20140198678 | METHOD AND APPARATUS FOR CONTROLLING INTERFERENCE IN WIRELESS COMMUNICATION SYSTEM - A method and apparatus for controlling interference in a wireless communication system are disclosed. A method for measuring inter-cell interference by a pico eNB in a wireless communication system includes: receiving transmission information of a dummy signal to be transmitted on at least one candidate carrier from a neighbor pico eNB; scheduling at least one user equipment (UE) served by the pico eNB to measure the dummy signal based on the transmission information; receiving a measurement value of the dummy signal from the at least one UE; and transmitting a measurement report of the dummy signal based on the measurement value to the neighbor pico eNB, wherein the dummy signal transmission information is specified for each of a plurality of subframe sets of the at least one candidate carrier. | 07-17-2014 |
20140211734 | METHOD AND APPARATUS FOR INTER-CELL INTERFERENCE COORDINATION FOR TRANSMISSION POINT GROUP - The present invention relates to a wireless communication system, and more specifically to a method and an apparatus for inter-cell interference coordination for a transmission point group. The method for carrying out an interference coordination in a wireless communication system according to one embodiment of the present invention comprises a step for exchanging interference coordination messages between transmission point groups, wherein one transmission group comprises a plurality of transmission points, and the interference coordination message can comprises interference coordination information about each individual transmission point unit within the one transmission point group, and interference coordination information about the overall transmission point unit within the one transmission point group. | 07-31-2014 |
20140213315 | METHOD FOR TRANSMITTING SOUNDING REFERENCE SIGNAL IN BASE STATION COOPERATIVE WIRELESS COMMUNICATION SYSTEM AND APPARATUS FOR SAME - The present invention relates to a method for a terminal transmitting a sounding reference signal in a wireless communication system. More particularly, the method comprises the steps of: receiving from a network at least one first transmission power offset value of the sounding reference signal for a first cell; deciding transmission power of the sounding reference signal for the first cell, based on transmission power for an uplink data channel for a second cell and the at least one transmission power offset value; and transmitting the sounding reference signal for the first cell to the first cell. | 07-31-2014 |
20140219202 | METHOD FOR TRANSMITTING UPLINK CONTROL INFORMATION, USER EQUIPMENT, METHOD FOR RECEIVING UPLINK CONTROL INFORMATION, AND BASE STATION - In the present invention, a physical uplink control channel (PUCCH) resource, which is used for transmitting acknowledgement/negative ACK (ACK/NACK) information related to downlink control information, is determined on the basis of n | 08-07-2014 |
20140233557 | METHOD AND APPARATUS FOR PERFORMING INTER-UE DIRECT COMMUNICATION IN WIRELESS COMMUNICATION SYSTEM - Disclosed in the present application is a method in which a user equipment (UE) performs inter-UE direct communication in a wireless communication system. More particularly, the method includes the steps of: transmitting a request message to an eNodeB for direct communication with a UE of another party; receiving sequence information from the eNodeB for time synchronization with the UE of the other party; detecting a transmission sequence to be made from the UE of the other party, using the sequence information; and performing the inter-UE communication with the UE Of the other party. | 08-21-2014 |
20140254530 | USER EQUIPMENT AND METHOD FOR TRANSMITTING UPLINK SIGNAL, AND BASE STATION AND METHOD FOR RECEIVING UPLINK SIGNAL - The present invention provides a method and an apparatus for transmitting an uplink signal in a Wireless communication system, and a method and apparatus for receiving the uplink signal. A base station transmits to the user equipment a first cell identifier and a second cell identifier. The user equipment transmits an uplink control signal and a first reference signal sequence for demodulating the uplink control signal, or transmits an uplink data signal and a second reference signal sequence for demodulating the uplink data signal. A first reference signal is generated by using the first cell identifier, and a second reference signal is generated by using the second cell identifier. | 09-11-2014 |
20140254537 | METHOD AND APPARATUS FOR CONTROLLING INTER-CELL INTERFERENCE IN WIRELESS COMMUNICATION SYSTEM - A method for transmitting reduced power-almost blank subframe (r-ABS) setting information from a first cell to a second cell, according to one embodiment of the present invention, comprises a step of the first cell transmitting to the second cell r-ABS pattern information for indicating the r-ABS which is setup by the first cell, and r-ABS power indication information for indicating transmission power of a physical downlink shared channel (PDSCH) of the first cell from the r-ABS, wherein the PDSCH transmission power of the first cell can be set to a transmission power which is low compared to a common subframe. | 09-11-2014 |
20140254708 | METHOD FOR REPORTING CHANNEL STATE INFORMATION ON A COORDINATED MULTI-POINT TRANSMISSION AND RECEPTION AGGREGATION, AND APPARATUS THEREFOR - According to one embodiment of the present invention, a method is disclosed in which user equipment (UE) that communicates with a coordinated multi-point transmission and reception (CoMP) aggregation transmits channel state information (CSI) on said CoMP aggregation in a wireless communication system. The method may enable the determination of the number of bits for inter-point phase information for points that belong to said CoMP aggregation, and the number of bits for a channel quality indicator (CQI) for said CoMP aggregation based on rank indicator (RI) information within the number of bits allocated for transmission of the channel state information, and may enable the transmission of the channel state information including the inter-point phase information and CQI on the CoMP aggregation to at least one of a plurality of points that belong to the CoMP aggregation in accordance with said determined number of bits. | 09-11-2014 |
20140269597 | METHOD FOR DETERMINING TRANSMISSION POWER INFORMATION OF DOWNLINK SUBFRAME AND APPARATUS THEREFOR - A method for an eNB to transmit a downlink signal to a User Equipment (UE) is disclosed. The method includes transmitting information about a data transmission power within an OFDM symbol in a data region of a downlink subframe to the UE. The information about the data transmission power is determined according to a specific condition and the specific condition includes at least one of presence/absence of a Cell-specific Reference Signal (CRS) within the symbol and a modulation scheme or a Modulation and Coding Scheme (MCS) of the symbol. The downlink subframe is a Non-Zero Power Almost Blank Subframe (NZP ABS) in which signals are transmitted at a lower transmission power than a transmission power of a normal subframe on downlink. | 09-18-2014 |
20140286232 | METHOD FOR TRANSMITTING CONTROL SIGNAL TO RELAY NODE AT BASE STATION IN MIMO WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREFOR - A method for transmitting a control signal to a relay node at a base station in a multi-input multi-output (MIMO) wireless communication system is disclosed. The method comprises configuring relay-resource element groups (R-REGs) in a unit of four resource elements (REs) contiguous in the ascending order of subcarrier indexes, except for resource elements for a reference signal (RS); allocating transmission resources to the control signal in a unit of the relay-resource element group; and transmitting the control signal to the relay node by using the allocated transmission resources, wherein the resource elements for the reference signal include resource elements for channel state information-RS (CSI-RS), which include resource elements for a channel state information RS to which a transmission power of 0 is allocated. | 09-25-2014 |
20140286280 | METHOD FOR MEASURING STATE OF CHANNEL QUALITY IN WIRELESS COMMUNICATION SYSTEM INCLUDING CELLS FORMED WITH A PLURALITY OF NETWORK NODES, AND APPARATUS THEREFOR - Disclosed are a method for measuring a state of channel quality in a wireless communication system including cells formed with a plurality of network nodes and an apparatus therefor. The method of enabling a terminal to measure the state of channel quality in the wireless communication system including the cells formed with the plurality of network nodes, includes the steps of: receiving the information related to a resource in which at least one first type network node transmits a Channel State Information-Reference Signal (CSI-RS); and measuring the intensity of a received signal on only the resource for transmitting the CSI-RS according to at least one first type network node on the basis of the received information. | 09-25-2014 |
20140286283 | METHOD AND APPARATUS FOR CONTROLLING INTER-CELL INTERFERENCE IN WIRELESS COMMUNICATION SYSTEM - A method for a base station transmitting transmission power of a subframe to a user equipment, according to one embodiment of the present invention, comprises a step of transmitting downlink control information to the user equipment through a physical downlink control channel (PDCCH), wherein the transmission power information of the subframe is indicated by information related to the PDCCH, and a value of the information related to the PDCCH can be decided based on a predetermined mapping relationship between the transmission power information and the value of the information related to the PDCCH. | 09-25-2014 |
20140293820 | METHOD AND APPARATUS FOR CONTROLLING INTER-CELL INTERFERENCE IN WIRELESS COMMUNICATION SYSTEM - A method for supporting a measurement of a user equipment, according to one embodiment, comprising the steps of: a second cell deciding at least one measurement resource set with respect to the user equipment, based on subframe setting information of a first cell and/or transmission power information of the first cell; and the second cell transmitting to the user equipment information for indicating the at least one measurement resource set that is decided, wherein the subframe setting information of the first cell can include setting information with respect to a first almost blank subframe (ABS) and a second ABS. | 10-02-2014 |
20140301332 | METHOD AND DEVICE FOR INTER CELL INTERFERENCE COORDINATION IN WIRELESS COMMUNICATION SYSTEM - A method in which a second cell receives subframe pattern information on a first cell according to one embodiment of the present application comprises a step in which uplink almost blank subframe (ABS) pattern information and downlink ABS pattern information on the first cell are received by a second cell, wherein the downlink ABS pattern information is not separated into first and second type ABSs set by the first cell, and the first and second type ABS patterns of the first cell can be identified on the basis of the downlink ABS pattern information and the uplink ABS pattern information. | 10-09-2014 |
20140302866 | METHOD FOR ALLOWING TERMINAL TO DETERMINE UPLINK TRANSMISSION POWER IN WIRELESS COMMUNICATION SYSTEM AND DEVICE THEREFOR - The present invention relates to a method for determining uplink transmission power of a terminal in a wireless communication system and a device therefore. Specifically, the method for allowing a terminal to determine uplink transmission power in a wireless communication system comprises the steps of: receiving information for determining uplink transmission power from an upper layer; measuring a path loss value for base stations, which participate in cooperate communication, on the basis of information for determining transmission power, on the basis of the received information for determining the transmission power and the measured path loss value, wherein the information for determining the transmission power is information for channel estimation of at least one base station which participates in the cooperative communication. | 10-09-2014 |
20140314041 | CHANNEL ESTIMATION METHOD AND APPARATUS USING REFERENCE SIGNAL - The present invention relates to a wireless communication system, and more specifically, to a method and an apparatus for estimating a channel using a reference signal. According to one embodiment of the present invention, a method in which a terminal estimates a channel in a wireless communication system may comprise the steps of: receiving a cell-specific reference signal (CRS) and a channel state information-reference signal (CSI-RS) from a base station; generating CSI of a channel estimated using the CRS on the basis of a channel estimated using the CSI-RS and a mapping relationship between the CRS port and the CSI-RS port; reporting the generated CSI to the base station; and demodulating data on the basis of the channel estimated using the CRS. | 10-23-2014 |
20140321359 | METHOD FOR TRANSMITTING CONTROL INFORMATION AND DEVICE THEREFOR - The present invention relates to a wireless communication system. More specifically, the present invention relates to a method and a device for reporting channel state information, wherein the method comprises the steps of: receiving configuration information for a period report of CSI from a first transmission point; and transmitting, to said first transmission point, a CSI report for the downlink of a transmission point corresponding to a corresponding subframe among a plurality of transmission points through each subframe that is periodically set according to said configuration information, wherein: one or more subframes corresponding to a second transmission point are used to transmit a CSI report for multi-transmission point cooperative transmission, if rank information reported to said first transmission point prior to said CSI report is a critical value or less; and one or more subframes corresponding to said second transmission point are used to transmit a CSI report for single-transmission point transmission, if the rank information reported to said first transmission point prior to said CSI report is said critical value or more. | 10-30-2014 |
20140328312 | METHOD AND APPARATUS FOR ENHANCED CONTROL CHANNEL-BASED OPERATION IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more specifically, to a method and an apparatus for enhanced control channel-based operation. A method for a base station for transmitting a downlink control channel in a wireless communication system according to one embodiment of the present invention comprises the steps of: determining one antenna port to be used for the downlink control channel; mapping the downlink control channel to a resource element on the basis of a reference signal for the one antenna port; and transmitting the mapped downlink control channel to a terminal, wherein an index for the one antenna port can be determined on the basis of a control channel element (CCE) index of the downlink control channel derived from the terminal identifier. | 11-06-2014 |
20140341149 | METHOD AND APPARATUS FOR ENHANCED CONTROL CHANNEL-BASED OPERATION IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more specifically, to a method and an apparatus for enhanced-control channel-based operation. A method for a terminal for transmitting confirmation response information in a wireless communication system according to one embodiment of the present invention comprises a step for transmitting confirmation response information for a downlink data channel by means of an uplink control channel resource, wherein an index for the uplink control channel resource can be determined on the basis of a delegate antenna port of a downlink control channel derived from the identifier of the terminal. | 11-20-2014 |
20140362720 | METHOD AND APPARATUS FOR TRANSMITTING MEASUREMENT REPORT IN A WIRELESS COMMUNICATION SYSTEM - A method and apparatus for transmitting a measurement report in a wireless communication system are disclosed. The method for transmitting a measurement report at a UE in the wireless communication system includes measuring received strengths and reception frequencies of first and second signals, and transmitting a measurement report including a frequency offset between the first and second signals, if the received strength of the second signal is equal to or larger than a predetermined threshold. The frequency offset is used to support cooperative transmission of transmission points transmitting the first and second signals. | 12-11-2014 |
20140376356 | METHOD AND APPARATUS FOR TRANSMITTING UPLINK SIGNAL IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more particularly, to a method and apparatus for transmitting an uplink signal. A method for transmitting an uplink signal at a UE in a wireless communication system includes, when a virtual cell ID for a reference signal for demodulation of a physical uplink channel is provided, generating a sequence of the reference signal on the basis of the virtual cell ID, and transmitting the generated reference signal to an eNB. A cycle shift hopping pattern of the reference signal can be determined on the basis of the virtual cell ID. | 12-25-2014 |
20140376456 | METHOD FOR TRANSMITTING A DOWNLINK CONTROL CHANNEL BY A BASE STATION IN A WIRELESS COMMUNICATION SYSTEM, AND APPARATUS THEREFOR - Disclosed in the present application is a method for receiving an ACK/NACK (Acknowledgement/Negative Acknowledgement) signal by a terminal in a wireless communication system. More specifically, the method comprises the steps of: transmitting an uplink data signal to a base station; a blind decoding of downlink control information including an ACK/NACK response signal regarding the uplink data signal so as to acquire a decoded signal; and checking the ACK/NACK response signal, corresponding to the terminal, from among the downlink control information. The downlink control information consists of ACK/NACK response signals corresponding to a plurality of terminals. | 12-25-2014 |
20140376484 | METHOD AND APPARATUS FOR TRANSMITTING UPLINK SIGNAL IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more particularly, to a method and apparatus for transmitting an uplink signal. A method for transmitting an uplink signal at a UE in a wireless communication system includes, when a virtual cell ID for a reference signal for demodulation of a physical uplink channel is provided, generating a sequence of the reference signal on the basis of the virtual cell ID, and transmitting the generated reference signal to an eNB. A first virtual cell ID for a physical uplink control channel and a second virtual cell ID for a physical uplink shared channel can be provided as separate parameters. | 12-25-2014 |
20150016292 | METHOD FOR MEASURING INTENSITY OF INTERFERENCE SIGNAL BASED ON CSI-RS IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS FOR SAME - Disclosed is a method for measuring the intensity of an interference signal by a terminal in a wireless communication system. More particularly, a method for measuring the intensity of an interference signal from a first base station by a terminal in a coordinated multipoint (CoMP) environment comprises: a step of receiving a plurality of channel status information-reference signals (CSI-RSs) from a second base station; a step of receiving downlink signals output from a plurality of resource element (RE) pairs corresponding to the respective plurality of CSI-RSs from the first base station; and a step of measuring a plurality of interference intensities based on the plurality of CSI-RSs and the received downlink signals. | 01-15-2015 |
20150016317 | METHOD FOR CONTROLLING TRANSMISSION POWER OF SOUNDING REFERENCE SIGNAL IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS FOR SAME - In the present invention, disclosed is a method for a terminal, which receives a downlink signal from a first base station and transmits an uplink signal to a second base station, transmitting a sounding reference signal (SRS) in a wireless communication system. More specifically, the method comprises the steps of: receiving from the first base station downlink control information including a triggering message of a first SRS; determining transmission power of the first SRS on the basis of the downlink control information; and transmitting the first SRS to the first base station with the transmission power that is determined, wherein a transmission power control command field, which is included in the downlink control information, is applied to a closed loop parameter for determining the transmission power of the first SRS. | 01-15-2015 |
20150016331 | APPARATUS FOR RECEIVING DOWNLINK SIGNAL IN A WIRELESS COMMUNICATION SYSTEM AND METHOD THEREOF - A method of receiving downlink signal at a user equipment in a wireless communication system is disclosed. The present invention includes receiving an information related to a reference signal of a neighbor cell from a serving cell and performing an interference handling in resources in accordance with the information related to the reference signal of the neighbor cell, wherein the information related to the reference signal of the neighbor cell comprises at least one selected from the group consisting of a cell ID (identity) of the neighbor cell, the number of ports for transmitting the reference signal of the neighbor cell, an frequency information for transmitting the reference signal of the neighbor cell and an time information for transmitting the reference signal of the neighbor cell. | 01-15-2015 |
20150016369 | METHOD FOR RECEIVING DOWNLINK DATA CHANNELS IN MULTICELL-BASED WIRELESS COMMUNICATION SYSTEMS AND APPARATUS FOR SAME - The present invention relates to a method by which a terminal receives a downlink data channel based on a terminal-specific reference signal in a wireless communication system. In detail, the method includes the steps of: receiving from a network information on one or more settings defining large scale properties of a terminal-specific reference signal through a higher layer; detecting from the network scheduling information on a downlink data channel based on a terminal-specific reference signal; and receiving from the network the downlink data channel based on the terminal-specific reference signal on the basis of the scheduling information, wherein the scheduling information includes an indicator indicating one or more of the settings. | 01-15-2015 |
20150016419 | METHOD AND APPARATUS FOR ACQUIRING SYSTEM INFORMATION IN WIRELESS COMMUNICATION SYSTEM - A method and apparatus for acquiring system information in a wireless communication system are disclosed. The method for acquiring system information by a user equipment (UE) in a wireless communication system includes: performing a handover from a first cell to a second cell; and acquiring system information of the second cell, wherein a method for acquiring the system information of the second cell is determined according to CRE (Cell Range Extension)-related capability of the UE. | 01-15-2015 |
20150017927 | METHOD FOR MEASURING INTERFERENCE STRENGTH IN WIRELESS COMMUNICATION SYSTEM AND DEVICE THEREFOR - The present invention relates to a wireless communication system and, more particularly, to a method for enabling a terminal to measure the strength of an interference signal in a wireless communication system and a device therefor, wherein the method comprises the steps of: measuring a first interference strength, which is the strength of an interference signal received from a first base station group; calculating a second interference strength, which is the strength of an interference signal received from a second base station group; and correcting the first interference strength on the basis of the second interference strength. | 01-15-2015 |
20150018030 | METHOD FOR CONTROLLING UPLINK TRANSMISSION POWER IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREFOR - The present application relates to a method for enabling a terminal to transmit a sounding reference signal (SRS) in a wireless communication system. Specifically, the method comprises the steps of selecting at least one SRS power control process of a first SRS power control process and a second SRS power control process on the basis of a terminal location area; determining the transmission power of the SRS by using at least one SRS power control process; and transmitting at least one SRS to at least one base station of a first base station and a second base station participating in base cooperation communication, using the determined SRS transmission power. The terminal location area is characterized in that the base station from which downlinks are received and the base station to which uplinks are transmitted, comprise different base station cooperation areas. | 01-15-2015 |
20150023194 | METHOD FOR TRANSCEIVING CHANNEL STATE INFORMATION IN WIRELESS ACCESS SYSTEM AND APPARATUS FOR THE METHOD - Disclosed is a method for transceiving channel state information in a wireless access system and an apparatus for the method. More particularly, the method comprises: a step of receiving, from user equipment, channel state information measurement capability indicating the total number of pieces of channel state information which can be measured by the user equipment; a step of transmitting, to the user equipment, information regarding the object for channel state information measurement set in the user equipment; and a step of receiving, from the user equipment, channel state information measured in the object for channel state information measurement. The object for channel state information measurement is restrictively set such that the total number of the objects for channel state information measurement is the same as or less than the channel state information measurement capability. | 01-22-2015 |
20150023265 | METHOD FOR RECEIVING DOWNLINK DATA CHANNELS IN MULTICELL-BASED WIRELESS COMMUNICATION SYSTEMS AND APPARATUS FOR SAME - The present invention relates to a method by which a terminal receives a downlink data channel in a wireless communication system. In detail, the method includes the steps of receiving from a network information on one or more settings defining large scale properties of a terminal-specific reference signal through a higher layer; detecting from the network one of either the first scheduling information or the second scheduling information on a downlink data channel based on a terminal-specific reference signal; and receiving the downlink data channel based on the terminal-specific reference signal on the basis of the detected scheduling information, wherein the first scheduling information includes an indicator indicating one or more of the settings, and the large scale properties of the terminal-specific reference signal are defined according to the setting indicated by the indicator during the detection of the first scheduling information, and a preset setting from among the one or more settings set during the detection of the second scheduling information. | 01-22-2015 |
20150023270 | METHOD AND APPARATUS FOR TRANSMITTING UPLINK SIGNAL IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system and, more specifically, to a method and an apparatus for transmitting an uplink signal. The method for transmitting an uplink signal from a terminal in a wireless communication system, according to one embodiment of the present invention, comprises the steps of: receiving configuration information about candidates in a parameter set for a reference signal for physical uplink shared channel (PUSCH) modulation; receiving information indicating a specific set among the candidates in the parameter set; and generating a sequence of the reference signal using the specific set and transmitting the generated reference signal to a base station, wherein the information indicating the specific set may have a maximum value of the minimum distance between a circular shift index of the reference signal generated by a terminal using the specific set and a circular shift index of a reference signal generated by another terminal using the specific set. | 01-22-2015 |
20150023275 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING SIGNALS IN WIRELESS COMMUNICATION SYSTEM - A method for transmitting, at a user equipment, an uplink signal to a transmission point performing cooperative transmission in a wireless communication system according to an embodiment of the present invention includes generating the uplink signal based on a virtual cell identifier and virtual timing information, wherein the virtual cell identifier and virtual timing information are independently configured according to transmission channels. | 01-22-2015 |
20150023280 | METHOD FOR FEEDING BACK CHANNEL STATE INFORMATION IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREFOR - The present invention relates to a method for receiving a reference CSI configuration information and a following CSI configuration information which is configured to report a same RI (Rank Indicator) as the reference CSI configuration information, receiving a first CSI-RS (Channel State Information-Resource Signal) configuration information associated with the reference CSI configuration and a second CSI-RS configuration information associated with the following CSI configuration, number of CSI-RS antenna ports according to the second CSI-RS configuration information is same as number of CSI-RS antenna ports according to the first CSI-RS configuration information; and transmitting CSI determined based on at least one of the first CSI-RS configuration information and the second CSI-RS configuration information. | 01-22-2015 |
20150029966 | METHOD FOR REPORTING CHANNEL STATE INFORMATION, METHOD FOR SUPPORTING SAME, AND APPARATUS FOR SAID METHODS - According to one embodiment of the present invention, the method for receiving a channel state information (CSI)-reference signal (RS) from a wireless communication system by a user device comprises the steps of: receiving resource configuration information on the CSI-RS; and receiving the CSI-RS on the basis of the resource configuration information on the CIS-RS, wherein the resource configuration information on the CSI-RS includes information on a cell specific-RS (CRS) related to the CSI-RS, and the user device can assume that an antenna port related to information on the CRS and an antenna port used for transmitting CSI-RS corresponding to the resource configuration information on the CSI-RS are quasi co-located. | 01-29-2015 |
20150029968 | METHOD AND APPARATUS FOR TRANSMITTING UPLINK SIGNAL IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more particularly, to a method and apparatus for transmitting an uplink signal. A method for transmitting an uplink signal at a UE in a wireless communication system includes, when a virtual cell ID for a reference signal for demodulation of a physical uplink channel is provided, generating a sequence of the reference signal on the basis of the virtual cell ID, and transmitting the generated reference signal to an eNB. A group hopping pattern of the reference signal can be determined on the basis of the virtual cell ID. | 01-29-2015 |
20150029969 | METHOD AND APPARATUS FOR TRANSMITTING UPLINK SIGNAL IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more particularly, to a method and apparatus for transmitting an uplink signal. A method for transmitting an uplink signal at a UE in a wireless communication system includes, when a virtual cell ID for a reference signal for demodulation of a physical uplink channel is provided, generating a sequence of the reference signal on the basis of the virtual cell ID, and transmitting the generated reference signal to an eNB. A sequence shift pattern of the reference signal can be determined on the basis of the virtual cell ID. | 01-29-2015 |
20150029972 | METHOD FOR RECEIVING OR TRANSMITTING DOWNLINK SIGNAL AND APPARATUS FOR SAME - The method for receiving a downlink signal in a wireless communication system, according to one embodiment of the present invention, comprises: receiving, from a base station, a candidate seed list and downlink control information for the generation of a sequence of a downlink demodulation reference signal, wherein a seed value is selected from the candidate seed list on the basis of seed value indicating information contained in the downlink control information and the sequence of the downlink demodulation reference signal is generated by using the selected seed value. The candidate seed list may include a plurality of hybrid automatic repeat request (HARQ) process identifiers and virtual cell identifiers related to the plurality of HARQ process identifiers. | 01-29-2015 |
20150036524 | METHOD AND APPARATUS FOR MEASURING NEIGHBOR CELL IN WIRELESS COMMUNICATION SYSTEM - A method and apparatus for measuring a neighbor cell in a wireless communication system are disclosed. The method for measuring a neighbor cell by a user equipment (UE) in a wireless communication system includes: receiving subframe information including a subframe pattern for neighbor cell measurement; performing synchronization acquisition from the neighbor cell; and performing measurement in a subframe corresponding to the subframe pattern, wherein the user equipment (UE) assumes that a signal required when the UE acquires synchronization from the neighbor cell is transmitted in a subframe corresponding to the subframe pattern. | 02-05-2015 |
20150043367 | METHOD AND APPARATUS FOR TRANSMITTING NEIGHBOR-CELL MEASUREMENT COMMAND IN WIRELESS COMMUNICATION SYSTEM - A method and apparatus for transmitting a neighbor cell measurement command in a wireless communication system are disclosed. The method for transmitting a measurement command of a neighbor cell by a serving cell in a wireless communication system includes: confirming user equipment (UE) capability information related to cell range extension (CRE); and transmitting a measurement command including a list of cells to be measured to the UE, wherein, if the UE has CRE-related capability, the measurement command includes neighbor-cell reference signal (RS) information. | 02-12-2015 |
20150043368 | METHOD AND APPARATUS FOR TRANSMITTING INFORMATION FOR REPORTING IN WIRELESS COMMUNICATION SYSTEM - One embodiment of the present invention relates to a method for a serving cell transmitting information for reporting a terminal measurement and/or reporting channel state information in a wireless communication system, and more specifically, to a method for transmitting information comprising a step of transmitting information to the terminal the measurement report and/or the channel state information report, wherein the information includes a plurality of channel state information-reference signal (CSI-RS) settings, wherein each of the plurality of CSI-RS settings includes information related to a bandwidth from which the CSI-RS is transmitted according to the relevant CSI-RS setting. | 02-12-2015 |
20150043369 | METHOD AND APPARATUS FOR PERFORMING MEASUREMENT IN WIRELESS COMMUNICATION SYSTEM - A method and apparatus for performing measurement are disclosed. The method for performing radio link monitoring by a user equipment (UE) in a wireless communication system includes: performing cancellation of a reference signal (RS) of a neighbor cell; and determining whether to declare a radio link failure (RLF) on the basis of a reference signal (RS) of a serving cell by using information of a predetermined power ratio related to the neighbor cell. | 02-12-2015 |
20150043469 | METHOD AND DEVICE FOR TRANSMITTING CHANNEL STATE INFORMATION IN WIRELESS COMMUNICATION SYSTEM - One embodiment of the present invention discloses a method for allowing a terminal to transmit channel state information (CSI) in a wireless communication system in which a plurality of CSI reference signal (CSI-RS) resources are set for a plurality of transmission points, and the method for transmitting the CSI comprises the steps of: determining CSI reference resources; and transmitting CSI calculated from a measured signal on the basis of the CSI reference resources, wherein the CSI reference resources are included in one of at least two CSI subframe sets, the CSI subframe sets are set for each of the plurality of CSI-RS resources, and the CSI subframe sets are commonly set for transmission points which perform cooperative transmission among the plurality of transmission points. | 02-12-2015 |
20150049625 | METHOD AND APPARATUS FOR REPORTING CHANNEL STATE INFORMATION IN WIRELESS COMMUNICATION SYSTEM - One embodiment of the present invention is a method for reporting channel state information by means of a terminal in a wireless communication system, the method comprising: a step of measuring a channel using at least one channel state information-reference signal (CSI-RS) indicated by at least one feedback type index from among a plurality of feedback type indices; and a step of generating channel state information based on the channel measurement and reporting the channel state information. Each of the plurality of feedback type indices indicates one or more CSI-RS configurations to be used in channel estimation and an effective channel relating to said one or more CSI-RS configurations. | 02-19-2015 |
20150049704 | METHOD AND APPARATUS FOR TRANSMITTING OR RECEIVING DOWNLINK SIGNAL - The method for receiving a downlink signal by user equipment in a wireless communication system that supports coordinated multiple-point transmission and reception (CoMP) according to one embodiment of the present invention comprises a step of receiving information regarding two candidate seed groups for generating a sequence of downlink demodulation reference signals; and a step of generating a sequence of downlink demodulation reference signals using one of at least two candidate DMRS set parameter groups. Each of at least two candidate DMRS set parameter groups includes a cell identifier and a scrambling identifier. The scrambling identifier included in one of at least two candidate DMRS set parameter groups may be determined whether the two cell identifiers included respectively in at least two candidate DMRS set parameter groups are the same or not. | 02-19-2015 |
20150055495 | METHOD AND APPARATUS FOR MEASURING SERVING CELL IN WIRELESS COMMUNICATION SYSTEM - A method and apparatus for measuring a serving cell in a wireless communication system are disclosed. The method for performing measurement by a user equipment (UE) in a wireless communication system includes: receiving a list of aggressor cells and neighbor-cell reference signal (RS) information from a serving cell; and performing measurement of the serving cell, wherein information as to whether CRE (Cell Range Extension)-related capability is used during the measurement is determined according to at least one of the presence or absence of CRE-related capability of the UE and information regarding configuration or non-configuration of restricted measurement. | 02-26-2015 |
20150055502 | METHOD AND APPRATUS FOR MEASUREMENT FOR INTER-CELL INTERFERENCE COORDINATION IN RADIO COMMUNICATION SYSTEM - A method for supporting measurement of a User Equipment (UE) by a first base station in a wireless communication system. The method according to an embodiment includes acquiring, by the first base station, information of a downlink subframe configuration of a second base station; and transmitting, by the first base station, information of measurement objects to the UE. The measurement objects are determined based on the downlink subframe configuration of the second base station. A measurement is performed by the UE in resources indicated based on the information of the measurement objects. The resources are determined as a combination of at least one Orthogonal Frequency Division Multiplexing (OFDM) symbol and at least one downlink subframe. The downlink subframe configuration of the second base station includes information indicating at least one subframe configured as an Almost Blank Subframe (ABS). | 02-26-2015 |
20150055518 | METHOD FOR TRANSMITTING OR RECEIVING UPLINK SIGNAL - The present invention relates to a method for user equipment transmitting an uplink signal in a time division duplex (TDD) wireless communication system, according to one embodiment. The method comprises: detecting a downlink control signal; and transmitting the uplink signal on the basis of uplink-related control information which is included in the downlink control signal that is detected, wherein a transmission power value is reported on the basis of an indicator, which indicates reporting of the transmission power value of the uplink signal at a specific time. | 02-26-2015 |
20150055555 | METHOD FOR ESTIMATING CHANNEL STATE IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREFOR - The present invention relates to a wireless communication system. More specifically, the present invention relates to a method for reporting a channel state by a terminal to a serving base station in a wireless communication system, wherein extra channel state information is reported to enable the serving base station to estimate the channel state more accurately. When the base station estimates the channel state with the terminal, the channel state information received from the terminal, the extra channel state information, and traffic information of neighboring base stations are collectively considered to estimate the channel state with the terminal, thereby enabling estimation of the channel state with improved reliability and accuracy. | 02-26-2015 |
20150055582 | METHOD FOR DETERMINING UPLINK RESOURCE, METHOD FOR TRANSMITTING UPLINK CONTROL SIGNAL USING SAME, AND APPARATUS THEREFOR - A method for transmitting uplink control information in a wireless communication system according to one embodiment of the present invention comprises: detecting downlink control information from a downlink control channel; and transmitting uplink control information using a resource of an uplink control channel determined on the basis of a control channel element (CCE) index of the downlink control channel from which the downlink control information is detected, and a user equipment (UE)-specific offset value for determining a resource of an uplink control channel. The uplink control information for at least two downlink control channels having different first CCE indexes can be assigned in the resource of the same uplink control channel. | 02-26-2015 |
20150055723 | METHOD FOR FEEDING BACK CHANNEL STATE INFORMATION IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREFOR - The present invention relates to a method for receiving a reference CSI configuration information and a following CSI configuration information which is configured to report a same RI (Rank Indicator) as the reference CSI configuration information, receiving a first precoding codebook subset information for the reference CSI configuration information and a second precoding codebook subset information for the following CSI configuration information, set of RIs according to the second precoding codebook subset information is same as set of RIs according to the first precoding codebook subset information, and transmitting CSI determined based on at least one of the first precoding codebook subset information and the second precoding codebook subset information. | 02-26-2015 |
20150063142 | METHOD AND APPARATUS FOR REPORTING CHANNEL STATE INFORMATION IN WIRELESS COMMUNICATION SYSTEM - One embodiment of the present invention relates to a method for a terminal to report channel state information in a wireless communication system, comprising the steps of: calculating one or more pieces of channel quality information from a signal measurement resource configuration and a plurality of interference measurement resource configurations associated with the signal measurement resource configuration; and transmitting a channel state report including the calculated channel quality information. | 03-05-2015 |
20150063177 | METHOD AND DEVICE FOR TRANSMITTING CHANNEL STATE INFORMATION IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system. A method for transmitting channel state information (CSI) by a user equipment in a wireless communication system includes receiving a CSI-reference signal (CSI-RS), determining overhead of a common reference signal (CRS) resource element based on the same antenna port number as an antenna port number associated with the CSI-RS, and transmitting the CSI calculated based on the CSI-RS and the overhead of the CRS resource element. | 03-05-2015 |
20150063234 | METHOD AND APPARATUS FOR TRANSMITTING OR RECEIVING DOWNLINK SIGNAL - Provided is a method for receiving a downlink signal by a user equipment (UE) in a wireless communication system supporting Coordinated Multi-point transmission and reception includes: receiving a list of candidate seeds for generating a sequence of a downlink demodulation reference signal (DM-RS) and downlink control information, and detecting the DCI; if a format of the detected DCI corresponds to a unique operation of a transmission mode configured to the UE, generating a sequence of the downlink DM-RS using one seed value selected from among the list of the candidate seeds on the basis of specific information included in the DCI; and if a format of the detected DCI corresponds to a fall-back operation of the transmission mode, generating a sequence of the downlink DM-RS using a specific seed value selected from among the list of the candidate seeds or an identifier (ID) of a serving cell. | 03-05-2015 |
20150063317 | METHOD FOR TRANSMITTING AND RECEIVING UPLINK SIGNALS, AND APPARATUS THEREFOR - The present invention relates to a method for transmitting an uplink signal in a wireless communication system. The method includes the steps of: transmitting an uplink signal in a first uplink transmitting timing period determined on the basis of a first timing advance command received from a first serving cell; and, when a specific condition is satisfied, transmitting an uplink signal in a second uplink transmitting timing period determined on the basis of a second timing advance command. | 03-05-2015 |
20150071195 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING REFERENCE SIGNAL IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system and, more specifically, to a method and an apparatus for transmitting and receiving a reference signal (RS). The method for enabling user equipment (UE) of the wireless communication system to transmit an uplink signal according to one embodiment of the present invention comprises the steps of: receiving information on candidates of a first parameter set used for generating a sequence of a first RS; and generating and transmitting a sequence of a second RS using a second parameter set determined among the candidates of the first parameter set. | 03-12-2015 |
20150071196 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING REFERENCE SIGNAL IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system and, more specifically, to a method and an apparatus for transmitting and receiving a reference signal (RS). The method for enabling user equipment (UE) of the wireless communication system to transmit an uplink signal according to one embodiment of the present invention comprises the steps of: receiving information on a plurality of parameter sets used for generating a sequence of RS; and generating and transmitting the sequence of the RS using one parameter set determined among the plurality of parameter sets. The parameters constituting the plurality of parameter sets can comprise the parameters commonly applied to the plurality of parameter sets and the parameters individually applied to the plurality of parameter sets. | 03-12-2015 |
20150078271 | METHOD AND APPARATUS FOR ESTIMATING CHANNEL IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system. A method for estimating a channel by a user equipment (UE) in a wireless communication system includes receiving information about at least one channel station information (CSI) configuration for reporting CSI of one of a plurality of serving cells, determining that the same precoding matrix is applied to a plurality of resource blocks when all of the at least one CSI configuration is configured to report a precoding matrix indicator (PMI) and a rank indicator (RI), and determining that the precoding matrix is applied to one resource block when CSI configuration configured not to report the PMI and the RI is present among the at least one CSI configuration, and estimating a channel based on a result of the determination. | 03-19-2015 |
20150078272 | METHOD AND APPARATUS FOR RECEIVING DATA IN WIRELESS COMMUNICATION SYSTEM SUPPORTING COOPERATIVE TRANSMISSION - The present invention relates to a wireless communication system. A method for receiving data by a user equipment (UE) in a cooperative multi-point (CoMP) wireless communication system includes receiving information indicating a transmission base station (BS) that actually transmits data among a plurality of BSs that participate in CoMP, receiving information about zero-power channel state information-reference signal (CSI-RS) of each of the plural BSs, and assuming that data is not mapped to a resource element of zero-power CSI-RS corresponding to the transmission BS and receiving the data through a physical downlink control channel (PDSCH). | 03-19-2015 |