Patent application number | Description | Published |
20110032889 | METHOD FOR PERFORMING RANDOM ACCESS PROCESS IN WIRELESS COMMUNICATION SYSTEM - A method of performing a random access process in a wireless communication system includes transmitting a random access preamble, receiving a random access response including uplink radio resource allocation information for multiple transmission time intervals (TTIs) in response to the random access preamble, transmitting a radio resource control (RRC) connection request message according to the uplink radio resource allocation information, and transmitting a non-access stratum (NAS) service request message according to the uplink radio resource allocation information. | 02-10-2011 |
20120008556 | METHOD AND APPARATUS FOR TRANSMITTING UPLINK REFERENCE SIGNAL IN A MULTI-ANTENNA WIRELESS COMMUNICATION SYSTEM - A method and apparatus for transmitting a Reference Signal (RS) during retransmission at a User Equipment (UE) in a multi-antenna wireless communication system are disclosed. The RS transmission method includes receiving an uplink grant from a Base Station (BS), initially transmitting data and an RS corresponding to each layer based on the uplink grant, receiving ACKnowledgment/Negative ACKnowledgment (ACK/NACK) information for the initially transmitted data, and retransmitting the RS corresponding to each layer and the data according to the ACK/NACK information. The retransmission includes initializing a cyclic shift value for the RS corresponding to each layer according to a cyclic shift field for RSs included in the uplink grant. | 01-12-2012 |
20120076023 | METHOD AND APPARATS FOR PERFORMING EFFICIENT FEEDBACK IN WIRELESS COMMUNICATION SYSTEM SUPPORTING MULTIPLE ANTENNA - A method for transmitting channel status information (CSI) of downlink transmission via uplink in a wireless communication system includes transmitting a rank indicator (RI) and a precoder type indicator (PTI) at a first subframe, transmitting at a second subframe a first precoding matrix indicator (PMI) when the PTI has a first value and transmitting a second PMI and a wideband channel quality indicator (WB CQI) when the PTI has a second value, and transmitting at a third subframe a second PMI and a WB CQI when the PTI has a first value and transmitting a subband (SB) CQI and a second PMI when the PTI has a second value. A user equipment (UE) preferred precoding matrix is indicated by a combination of the first PMI and the second PMI. Subsampled codebooks of precoding codebooks of individual Rank-2, Rank-3 and Rank-4 are applied to the second PMI. | 03-29-2012 |
20120076028 | Method and apparatus for performing effective feedback in wireless communication system supporting multiple antennas - A method for transmitting channel status information (CSI) of downlink multi-carrier transmission includes generating the CSI including at least one of a rank indicator (RI), a first precoding matrix index (PMI), a second PMI and a channel quality indicator (CQI) for one or more downlink carriers, the CQI being calculated based on precoding information determined by a combination of the first and second PMIs, determining, when two or more CSIs collide with one another in one uplink subframe of one uplink carrier, a CSI to be transmitted on the basis of priority, and transmitting the determined CSI over a uplink channel. If a CSI including an RI or a wideband first PMI collides with a CSI including a wideband CQI or a subband CQI, the CSI including a wideband CQI or a subband CQI has low priority and is dropped. | 03-29-2012 |
20120076236 | METHOD AND APPARATUS FOR EFFICIENT FEEDBACK IN A WIRELESS COMMUNICATION SYSTEM SUPPORTING MULTIPLE ANTENNA - A method and apparatus for transmitting effective channel status information (CSI) in a wireless communication system supporting multiple carriers are disclosed. A method for transmitting CSI of DL transmission via uplink in a wireless communication system includes transmitting a rank indicator (RI) at a first subframe, and transmitting a first precoding matrix indicator (PMI), a second PMI, and a wideband (WB) channel quality indicator (CQI) at a second subframe. UE preferred precoding matrix is indicated by a combination of the first PMI and the second PMI. A subsampled codebook for each precoding codebook of ranks from Rank-1 to Rank-4 is applied to the first PMI and the second PMI, and a sum of the first PMI and the second PMI for each of Rank-1 to Rank-4 is comprised of 4 bits. | 03-29-2012 |
20120088534 | METHOD AND USER EQUIPMENT FOR TRANSMITTING UPLINK SIGNAL, AND METHOD AND BASE STATION FOR RECEIVING UPLINK SIGNAL - A method for transmitting, at a user equipment having N (N being an integer greater than 1) transmission antennas, an uplink signal to a base station and a method for receiving, at the base station, an uplink signal from the user equipment are disclosed. The base station transmits reception capability information of the base station to the user equipment. Reception capability information includes information indicating that the base station may receive a signal transmitted through a maximum of M (M being an integer greater than 1) transmission antennas. The user equipment transmits the uplink signal using N transmission antennas if N is not greater than M and transmits the uplink signal using M transmission antennas if N is greater than M. | 04-12-2012 |
20120099491 | METHOD AND APPARATUS FOR TRANSMITTING ACK/NACK INFORMATION IN MULTICARRIER-SUPPORTING WIRELESS COMMUNICATION SYSTEM - A method and apparatus for transmitting ACK/NACK information in a multicarrier-supporting wireless communication system are disclosed. A method for allowing a user equipment to transmit ACK/NACK information in a multicarrier-supporting wireless communication system includes generating individual ACK/NACK information in association with individual codewords received from a base station through N carriers (where N≧2) for use in M downlink subframes (where M≧2), performing, if the sum of numbers of bits of the individual ACK/NACK information exceeds a predetermined payload size and M is not set to | 04-26-2012 |
20120099545 | METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM - A wireless communication system is disclosed. Disclosed herein are methods for transmitting a physical uplink control channel (PUCCH) signal in a wireless communication system, which includes setting transmit power for the PUCCH signal, and an apparatus thereof. If the PUCCH signal is transmitted on a subframe configured for a scheduling request (SR), the PUCCH signal includes one or more hybrid automatic repeat request acknowledgement (HARQ-ACK) bits and an SR bit. When determining the transmit power for the PUCCH, the SR bit is selectively considered depending on whether or not a transport block for an uplink shared channel (UL-SCH) is present in the subframe. | 04-26-2012 |
20120183086 | METHOD FOR TRANSMITTING SOUNDING REFERENCE SIGNAL IN MULTIPLE ANTENNA WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREFOR - A method for transmitting a sounding reference signal from a user equipment in a MIMO antenna wireless communication system is disclosed. The method comprises receiving sounding reference signal setup information from a base station, the sounding reference signal setup information including an initial cyclic shift value n | 07-19-2012 |
20120207111 | METHOD AND APPARATUS FOR TRANSMITTING CHANNEL QUALITY CONTROL INFORMATION IN WIRELESS ACCESS SYSTEM - Provided is a method for transmitting channel quality control information using two transport blocks in a wireless access system that supports hybrid automatic retransmit request (HARQ). The method may include the steps of receiving a physical downlink control channel (PDCCH) signal including downlink control information (DCI); calculating the number of coded symbols, Q′, required to transmit the channel quality control information using the DCI; and transmitting the channel quality control information through a physical uplink shared channel (PUSCH) on the basis of the number of coded symbols. | 08-16-2012 |
20120263127 | METHOD AND APPARATUS FOR RECEIVING A DOWNLINK SIGNAL IN A WIRELESS COMMUNICATION SYSTEM SUPPORTING CARRIER AGGREGATION - The present invention relates to a method for receiving a downlink signal at a terminal in a wireless communication system. In particular, the method comprises: receiving a control channel to be transmitted to a specific subframe via a first carrier; and decoding a data channel corresponding to the control channel to be transmitted to the specific subframe via a second carrier, using at least one parameter included in the control channel, wherein information on the orthogonal frequency division multiplexing (OFDM) start symbol of data channels that are transmitted via each of at least one carrier allocated to the terminal is signaled through an upper layer. | 10-18-2012 |
20130044667 | METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method in which a terminal transmits control information in a wireless communication system, comprising the following steps: selecting a PUCCH resource for control information from among a plurality of PUCCH resources; transmitting, through the selected PUCCH resources, a PUCCH signal carrying the modulation value corresponding to the control information; and transmitting a reference signal for the demodulation of the PUCCH signal, wherein the control information is identified by a combination of the PUCCH resource and resources for the modulation value and the reference signal. | 02-21-2013 |
20130051369 | METHOD AND APPARATUS FOR MULTIPLEXING CONTROL INFORMATION AND DATA, AND FOR TRANSMITTING THE MULTIPLEXED CONTROL INFORMATION AND DATA IN A MIMO WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more particularly, to a method and apparatus for transmitting uplink control information in a wireless communication system. A method for multiplexing uplink control information and uplink data and for transmitting the multiplexed uplink control information and uplink data according to one embodiment of the present invention comprises the following steps: encoding a first transmission block and a second transmission block to generate a first codeword and a second codeword; mapping the first codeword and the second codeword to one or more layers, respectively; and transmitting, via one or more antenna ports, each layer to which the first codeword and the second codeword are mapped, wherein the uplink control information is multiplexed only to either the first transmission block or to the second transmission block. | 02-28-2013 |
20130058240 | PDCCH MONITORING METHOD AND APPARATUS IN A CARRIER JUNCTION SYSTEM - The present invention relates to a PDCCH monitoring method in a carrier junction system, comprising: monitoring a plurality of candidate PDCCHs in an overlapping region between a PDCCH search space of a first component carrier and a PDCCH search space of a second component carrier; and receiving downlink control information through one PDCCH out of the plurality of candidate PDCCHs, which has succeeded in decoding. The PDCCH having succeeded in decoding is a shared PDCCH that contains shared control information, a PDCCH for a self-scheduling component carrier without a carrier indicator field, or a PDCCH for a primary component carrier. | 03-07-2013 |
20130058305 | METHOD FOR PERFORMING CHANNEL INTERLEAVING IN A MULTI-ANTENNA WIRELESS COMMUNICATION SYSTEM, AND APPARATUS FOR SAME - The present application relates to a method in which a terminal performs channel interleaving in a multi-antenna wireless communication system. More particularly, the method comprises the following steps: constructing both channel quality indicator (CQI) information and coded data information into preset bit-wide vectors to generate a first interleaver input vector sequence; repeating both rank indicator (RI) information and acknowledgement/negative acknowledgement (ACK/NACK) information per the number (N | 03-07-2013 |
20130064228 | METHOD FOR DETERMINING MODULATION ORDER OF UPLINK CONTROL INFORMATION IN MULTIPLE ANTENNA WIRELESS COMMUNICATION SYSTEM AND DEVICE THEREFOR - Disclosed is a method for allowing a terminal equipped with multiple antennas to transmit uplink control information in a wireless communication system. More specifically, the method comprises the steps of generating a plurality of codewords by using data information and said uplink control information; modulating each of the generated codewords based on predetermined modulation orders; and transmitting the modulated signals to a base station through said multiple antennas, wherein first uplink control information of said uplink control information is mapped into a particular codeword among the plurality of codewords, second uplink control information is repeated and mapped for each of the plurality of codewords, and a modulation order for the second uplink control information is the modulation order corresponding to said particular codeword. | 03-14-2013 |
20130077523 | METHOD AND DEVICE FOR TRANSMITTING/RECEIVING CHANNEL STATE INFORMATION IN WIRELESS COMMUNICATION SYSTEM SUPPORTING MULTICARRIERS - The present invention relates to a wireless communication system, and more particularly, discloses a method and a device for transmitting/receiving channel state information in a wireless communication system supporting multicarriers. The method for transmitting downlink channel state information in the wireless communication system supporting downlink multicarriers, according to one embodiment of the present invention, comprises the following steps: receiving from at least one downlink carrier an uplink grant downlink control information (DCI) including a request for the channel state information; measuring the channel state information of at least one first type downlink carrier; and transmitting the measured channel state information on a physical uplink shared channel (PUSCH) resource indicated by the uplink grant DCI, wherein the downlink multicarriers comprise the first type downlink carrier and a second type downlink carrier, wherein the channel state information on the second type downlink carrier may not be transmitted. | 03-28-2013 |
20130088972 | METHOD FOR SEARCHING CONTROL SIGNAL IN A WIRELESS ACCESS SYSTEM SUPPORTING CARRIER AGGREGATION (CA) - The present invention relates to a wireless access system supporting carrier aggregation and carrier aggregation technology, and discloses methods for effectively detecting control signals for a plurality of cells and apparatuses supporting same. In an embodiment of the present invention, a method for detecting control signals in a wireless access system supporting multiple carrier aggregation (CA) and cross carrier scheduling may comprise calculating the start point of a reference search space in an expanded search space, calculating start points of the next search spaces which are spaced apart from the reference search space by a predetermined offset value, and performing blind decoding on the reference search space and subsequent search spaces to search control signals from a base station. | 04-11-2013 |
20130094468 | METHOD AND DEVICE FOR DETERMINING PRECODING INFORMATION FOR UPLINK MULTI-ANTENNA TRANSMISSION - The present invention relates to a method for allowing a terminal to transmit uplink data through an HARQ method in a wireless communication system that supports MIMO transmission comprises the steps of: transmitting a plurality of data blocks to a base station on the basis of an uplink grant; receiving, from the base station, control information which indicates a NACK for some data blocks among the plurality of data blocks; selecting, according to a predetermined rule shared in the terminal and the base station, a precoding matrix which is to be applied to the data blocks for which the NACK is indicated; and retransmitting the data blocks, for which the NACK is indicated, to the base station by applying the selected precoding matrix. | 04-18-2013 |
20130107985 | METHOD FOR TRANSMITTING CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM, AND APPARATUS FOR SAME | 05-02-2013 |
20130114391 | METHOD FOR TRANSMITTING AN UPLINK SIGNAL, AND APPARATUS FOR SAME - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method for transmitting an uplink signal, comprising: multiplexing control information and multiple pieces of data information; and transmitting the multiplexed control information and multiple pieces of data information through a physical uplink shared channel. The number Q′ of modulation symbols for transmitting the multiplexed control information is determined by a specific mathematical expression, and selection offset â is a value which is set by a preset condition from among the offset values corresponding to the respective data information. | 05-09-2013 |
20130114477 | METHOD FOR TRANSMITTING RESPONSE INFORMATION IN A WIRELESS COMMUNICATION SYSTEM, AND APPARATUS FOR SAME - The present invention relates to a method for transmitting response information on downlink data through multiple information blocks to be bundled in a wireless system in a time division duplex (TDD) mode. The method for transmitting response information according to the present invention comprises the following steps: coding response information on the downlink data; scrambling the coded response information; and transmitting the scrambled response information to a base station, wherein, if a portion of the bits of the coded response information are information bits that indicate ACK/NACK on the downlink data, the scrambling step involves scrambling the coded response information using a specific scrambling sequence, and the specific scrambling sequence includes information on the number of information blocks to be bundled. | 05-09-2013 |
20130121297 | TERMINAL DEVICE AND METHOD FOR TRANSMITTING A POWER HEADROOM REPORT IN A WIRELESS COMMUNICATION SYSTEM SUPPORTING MULTIPLE COMPONENT CARRIERS - The present invention relates to a terminal device and method for transmitting a power headroom report (PHR) in a wireless communication system supporting multiple component carriers. The terminal device of the present invention comprises a transmitter for transmitting, to a base station, PHR information on at least one component carrier and information on the maximum power reduction (MPR) of the terminal device, wherein the PHR information on the at least one component carrier includes component carrier index information, and the MPR information of the terminal device may be an MPR value of said at least one component carrier, or a sum of the MPR values of said at least one component carrier. | 05-16-2013 |
20130121301 | METHOD FOR APERIODIC FEEDBACK OF CHANNEL STATE INFORMATION IN A WIRELESS ACCESS SYSTEM SUPPORTING MULTI-CARRIER AGGREGATION - The present invention relates to a wireless access system supporting multi-carrier aggregation (CA) and discloses various methods and devices for aperiodic feedback of channel state information (CSI). The method for aperiodic feedback of the channel state information (CSI) in the wireless access system supporting the multi-carrier aggregation (CA), according to an embodiment of the present invention, comprises the steps of: receiving a first message including an aperiodic CSI request field and uplink grant from a base station; receiving a second message including bitmap information indicating a downlink component carrier (DL CC) subjected to CSI measurement from the base station; measuring the CSI in consideration of at least one of the aperiodic CSI request, uplink grant, and bitmap information; and transmitting the measured CSI to the base station through a physical uplink shared channel (PUSCH) to thereby receive aperiodic feedback of the same. | 05-16-2013 |
20130128833 | UPLINK POWER CONTROL METHOD AND USER EQUIPMENT - The present invention relates to an uplink power control method and user equipment, which involve determining a power correction factor by considering the number of antenna ports. According to the present invention, even when a base station transmits the same power control information to the user equipment, the user equipment maps the power control information to another power correction factor and determines an uplink transmission power depending on an uplink transmission condition. Thus, uplink power control can be performed in a more efficient manner. | 05-23-2013 |
20130129018 | METHOD AND APPARATUS FOR TRANSCEIVING A PRECODED SIGNAL IN A MULTIPLE ANTENNA SUPPORTED WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method for transmitting a signal from a transmitter to a receiver through N number of transmitting antennas (where N≧2), comprising: selecting a first and a second matrix from a first and a second codebook related to a first and a second precoding matrix indicator (PMI), respectively, and determining a precoding matrix on the basis of the first and second matrix; performing precoding by using the determined precoding matrix for L number of layers (where 1≦L≦N) to which a signal to be transmitted to the receiver is mapped; and transmitting the precoded signal to the receiver through the N number of transmitting antennas. Here, the first codebook includes one or more diagonal matrices having an N×N size, non-zero elements in the diagonal matrix has a predetermined phase value, and the second codebook includes one or more matrices having an N×L size. | 05-23-2013 |
20130142161 | METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more particularly, to a method and apparatus for transmitting control information. The wireless communication system may support carrier aggregation (CA). A method for a terminal to transmit control information to a base station in a wireless communication system comprises: a step of receiving a plurality of transmitting blocks from the base station via one or more serving cells constructed for the terminal; and a step of transmitting first control information regarding the received transport blocks to the base station, wherein each of the serving cells may carry one or more transport blocks, and the first control information may be information regarding each of the transport blocks contained in the respective serving cells. | 06-06-2013 |
20130148613 | METHOD AND DEVICE FOR TRANSMITTING CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system. More specifically, the present invention relates to a method and a device for reporting CSI in a wireless communication system, the method comprising: a step for configuring a plurality of serving cells; and a step for reporting the CSI of only one serving cell in a corresponding subframe, wherein the step for reporting the CSI of only one serving cell comprises: excluding reporting the CSI of a lower priority when CSI reports of the plurality of serving cells in the corresponding subframe collide; and excluding reporting the CSI of serving cells other than the serving cell having the smallest index when the CSI reports of different serving cells having the same priority in the corresponding subframe collide. | 06-13-2013 |
20130156125 | METHOD AND APPARATUS FOR TRANSMITTING SIGNALS USING CODEBOOKS IN A WIRELESS COMMUNICATION SYSTEM THAT SUPPORTS MULTIPLE ANTENNAS - The present invention relates to a wireless communication system, and more particularly, to a method and apparatus for transmitting signals using codebooks in a wireless communication system that supports multiple antennas. A method in which a base station transmits downlink signals according to one embodiment of the present invention comprises the following steps: receiving a first precoding matrix indicator (PMI) and a second precoding matrix indicator from a terminal; determining a first matrix (W1) from a first codebook including precoding matrixes indicated by the first PMI, determining a second matrix (W2) from a second codebook, including precoding matrices indicated by the second PMI, and determining a precoding matrix (W) based on the first matrix (W1) and second matrix (W2); performing precoding on one or more layers, to which the downlink signals are mapped, using the determined precoding matrix (W); and transmitting the precoded signals to the terminal. Each of the precoding matrices included in the first codebook is a block diagonal matrix, and one block has, as compared to the other block, a form multiplied by a predetermined phase value. | 06-20-2013 |
20130163521 | METHOD AND USER EQUIPMENT FOR TRANSMITTING UPLINK CONTROL INFORMATION - A user equipment (UE) transmits uplink control information (UCI) of 3 bits or more to a base station (BS) after modulating the UCI into 1-bit or 2-bit sub-UCI units. Here, the UE maps each 1-bit or 2-bit sub-UCI unit to one of a plurality of corner constellation points regardless of modulation order of data which is multiplexed with the UCI. The corner constellation points are points having a maximum Euclidean distance from among a plurality of constellation points corresponding to the modulation order. | 06-27-2013 |
20130163528 | METHOD FOR CONTROLLING UPLINK TRANSMISSION POWER FOR TRANSMITTING A PLURALITY OF CODE WORDS IN A WIRELESS COMMUNICATION SYSTEM THAT SUPPORTS A PLURALITY OF ANTENNAS, AND APPARATUS FOR PERFORMING THE METHOD - The present invention relates to a terminal which controls uplink transmission power for transmitting a plurality of code words in a wireless communication system that supports a plurality of antennas, and a method in which the terminal performs the control. In a terminal which controls uplink transmission power for transmitting a plurality of code words in a wireless communication system that supports a plurality of antennas, a receiver receives, from a base station, an indicator that concerns the determination of the transmission power for each code word of the plurality of code words. A processor determines uplink transmission power for transmitting the plurality of code words on the basis of the indication value of the indicator. If the indication value is zero, the processor allocates the same uplink transmission power to each of the plurality of code words. | 06-27-2013 |
20130163553 | APPARATUS FOR TRANSMITTING CONTROL INFORMATION IN A WIRELESS COMMUNICATION SYSTEM AND METHOD THEREOF - In a wireless communication system, a method of transmitting control information, which is transmitted to a base station by a user equipment, includes the steps of receiving at least one of PDCCH and PDSCH from the base station via at least one serving cell configured in the user equipment and transmitting a 2nd control information to the base station together with a 1st control information resulting from performing a bundling on at least one portion of the control information on a reception of the PDCCH or a reception of the PDSCH indicated by the PDCCH, wherein the 1st control information and the 2nd control information are transmitted using PUCCH (Physical Uplink Control Channel) resource selected in accordance with a preset rule and a modulation value and wherein the 1st control information and the 2nd control information are identified by a combination of the selected PUCCH resource and the modulation value. | 06-27-2013 |
20130176982 | METHOD AND DEVICE FOR TRANSMITTING CONTROL INFORMATION IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system. In more detail, in relation to a method for a terminal to transmit ACK/NACK in a wireless communication system, an ACK/NACK transmission method includes: receiving at least one Physical Downlink Shared Channel (PDSCH); transmitting at least one ACK/NACK corresponding to the at least one PDSCH through a plurality of Physical Uplink Control Channel (PUCCH) formats; and, when the at least one ACK/NACK is transmitted using a first PUCCH format, transmitting at least one ACK/NACK in an antenna port transmission mode set for a second PUCCH format. | 07-11-2013 |
20130182627 | APPARATUS FOR TRANSMITTING CONTROL INFORMATION IN A WIRELESS COMMUNICATION SYSTEM AND METHOD THEREOF - In a wireless communication system, a method of transmitting control information, which is transmitted to a base station by a user equipment, includes the steps of receiving at least one of PDCCH and PDSCH from the base station via at least one serving cell configured in the user equipment and transmitting a 2nd control information to the base station together with a 1st control information resulting from performing a bundling on at least one portion of the control information on a reception of the PDCCH or a reception of the PDSCH indicated by the PDCCH, wherein the bundling is performed on each of the at least one serving cell configured in the user equipment by a prescribed time unit and wherein the 2nd control information includes information related to the PDCCH last detected by the user equipment from the received at least one PDCCH. | 07-18-2013 |
20130182789 | METHOD AND DEVICE FOR EFFICIENT FEEDBACK IN WIRELESS COMMUNICATION SYSTEM THAT SUPPORTS MULTIPLE ANTENNAS - The present invention relates to a method for allowing a terminal to transmit CSI for downlink transmission from a base station through an uplink comprises the steps of: receiving a downlink signal through a downlink channel; generating CSI that contains one or more indicators among an RI, a PMI, and CQI for the downlink channel; and transmitting the CSI through an uplink channel, wherein the CSI can contain one or more pieces of information among a first type of CSI which is determined on the basis of a rank N that is determined by the terminal and a second type of CSI which is determined on the basis of a rank that is restricted by a reference value M. | 07-18-2013 |
20130188591 | METHOD AND APPARATUS FOR EFFICIENT FEEDBACK IN A WIRELESS COMMUNICATION SYSTEM THAT SUPPORTS MULTIPLE ANTENNAS - The present invention relates to a method for transmitting channel state information for downlink multicarrier transmission comprises the following steps: generating channel state information for one or more downlink carriers; if two or more channel state information types for one or more downlink carriers collide in a physical uplink control channel (PUCCH) region of one uplink carrier, determining the channel state information type to be transmitted in the PUCCH region of one uplink carrier on the basis of the priority established in accordance with the reporting period of each piece of channel state information; and transmitting the channel state information corresponding to the determined channel state information type, wherein the priority may be established such that the channel state information having a longer reporting period has a higher priority than that of the channel state information having a shorter reporting period. | 07-25-2013 |
20130195066 | METHOD AND DEVICE FOR TRANSMITTING/RECEIVING UPLINK CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method for a terminal to transmit acknowledgement information including: determining a physical uplink control channel (PUCCH) format and resource, in which the acknowledgement information is transmitted in response to a downlink transmission received in a downlink sub-frame set including M (M≧1) downlink sub-frame; and transmitting the acknowledgement information using the PUCCH format and resource in one uplink sub-frame. Here, more than one serving cells are configured to the terminal, and the more than one serving cells can include one PCell and at least one SCell. The acknowledgement information can be transmitted using a PUCCH format 1a/1b when one physical downlink shared channel (PDSCH) without a corresponding physical downlink control channel (PDCCH) detected, exists only on PCell in the downlink sub-frame set, and a semi-persistent scheduling (SPS) release PDCCH does not exist in the downlink sub-frame set. | 08-01-2013 |
20130201932 | METHOD AND APPARATUS FOR TRANSCEIVING CONTROL INFORMATION FOR UPLINK MULTI-ANTENNA TRANSMISSION - The present description relates to a wireless communication system, and more particularly, to a method and apparatus for transceiving control information for uplink multi-antenna transmission. A method for transmitting control information for uplink multi-antenna transmission according to one embodiment of the present invention comprises the following steps: attaching a CRC parity bit to a PDCCH payload sequence containing uplink transmission resource allocation information; scrambling the CRC parity bit attached to the payload sequence to a bit sequence which indicates control information for uplink multi-antenna transmission; and transmitting the entirety of the sequence to which the scrambled CRC parity bit is attached to the payload sequence. | 08-08-2013 |
20130201964 | METHOD AND APPARATUS FOR TRANSCEIVING DATA IN A WIRELESS COMMUNICATION SYSTEM WHICH SUPPORTS A PLURALITY OF COMPONENT CARRIERS - The present disclosure relates to an operating method of a terminal for transceiving data to/from a base station in a system that supports a plurality of component carriers. The method includes receiving, from the base station, downlink control information (DCI) masked using a terminal identifier (cell-radio network temporary identifier (C-RNTI)) or a semi-persistent scheduling terminal identifier (SPS C-RNTI) through a physical downlink control channel (PDCCH); determining a component carrier for transceiving data to/from the base station; and transceiving data to/from the base station through the determined component carrier. The determining includes determining the component carrier which has received the PDCCH as a component carrier for receiving downlink data, and determining an uplink component carrier linked with the component carrier which has received the PDCCH as a component carrier for transmitting uplink data. | 08-08-2013 |
20130208677 | Method and Base Station for Transmitting Downlink Signal and Method and Equipment for Receiving Downlink Signal - A base station of the present invention configures resources in which a downlink signal is to be transmitted with zero power using resource sets defined for a specific number of antenna ports, regardless of the number of antenna ports actually configured in the base station, and transmits resource information indicating the configured resources to a user equipment. The user equipment of the present invention receives a downlink transmission from the base station, assuming that transmission power of resources corresponding to a resource set indicated by the resource information is zero. | 08-15-2013 |
20130208695 | METHOD FOR TRANSMITTING CONTROL INFORMATION IN A WIRELESS COMMUNICATION SYSTEM, AND DEVICE THEREFOR - The present invention discloses a method for a terminal to transmit control information in a wireless communication system. The method includes encoding a plurality of pieces of control information and transmitting the plurality of encoded control information and data information through a data channel. During the encoding of the plurality of control information, a channel quality indicator (CQI) and a precoding matrix index (PMI) for an entire frequency band are encoded jointly or separately, and each piece of the plurality of pieces of encoded control information and the data information is mapped into a resource block of the data channel, and is then transmitted. | 08-15-2013 |
20130208773 | METHOD FOR TRANSMITTING SOUNDING REFERENCE SIGNAL IN MULTIPLE ANTENNA WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREFOR - A method for transmitting a sounding reference signal from a user equipment in a MIMO antenna wireless communication system is disclosed. The method comprises receiving sounding reference signal setup information from a base station, the sounding reference signal setup information including an initial cyclic shift value n | 08-15-2013 |
20130215803 | METHOD AND DEVICE FOR TRANSMITTING/RECEIVING UPLINK CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM - The present invention relates a method for a terminal to transmit acknowledgement information including determining a physical uplink control channel (PUCCH) format and resource, in which acknowledgement information is transmitted in response to a downlink transmission in a downlink sub-frame set including M (M≧1) downlink sub-frame; and transmitting the acknowledgement information using the PUCCH format and resource in one uplink sub-frame. Here, one or more serving cells including one PCell and at least one SCell are configured to the terminal. In the determining step, the acknowledgement information may be transmitted using a PUCCH format 1a/1b, when a semi-persistent scheduling release physical downlink control channel (PDCCH) does not exist in the downlink sub-frame set, and one physical downlink shared channel, which is indicated through the detection of a corresponding PDCCH having a downlink assignment index value of one, exists in the downlink sub-frame set. | 08-22-2013 |
20130215865 | METHOD AND DEVICE FOR TRANSMITTING/RECEIVING UPLINK CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method for a terminal to transmit acknowledgement information comprising: determining a physical uplink control channel (PUCCH) format and resource, in which acknowledgement information is transmitted in response to a downlink transmission in a downlink sub-frame set including M(M≧1) downlink sub-frame; and transmitting the acknowledgement information using the PUCCH format and resource in one uplink sub-frame. Here, one serving cell may be configured to a terminal. Also, in the determining step, the acknowledgement information may be transmitted by using a PUCCH format 1a/1b, when a semi-persistent scheduling releasing physical downlink control channel (PDCCH) does not exist in the downlink sub-frame set, and one physical downlink shared channel, which is indicated through the detection of a corresponding PDCCH having a downlink assignment index value equals to one, exists in the downlink sub-frame set. | 08-22-2013 |
20130223301 | UPLINK CONTROL INFORMATION TRANSMITTING/RECEIVING METHOD AND DEVICE IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more particularly, to an uplink control information transmitting/receiving method and device. A method of transmitting acknowledgement information in a wireless communication system by a terminal according to an embodiment of the present invention includes: determining whether transmission of a scheduling request is set in one subframe where acknowledgement information on downlink transmission is to be transmitted; determining a Physical Uplink Control Channel (PUCCH) format and a resource with which the acknowledgement information is to be transmitted; and transmitting the acknowledgement information by using the PUCCH format and the resource. Here, when the transmission of the scheduling request is set in the one subframe and the acknowledgement information corresponds to only a Physical Downlink Shared Channel (PDSCH) received on only a Primary Cell (PCell), the acknowledgement information and the scheduling request may be transmitted using PUCCH format 1a/1b. | 08-29-2013 |
20130230033 | UPLINK CONTROL INFORMATION TRANSMITTING/RECEIVING METHOD AND DEVICE IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method for a terminal to transmit acknowledgement information in a wireless communication system including: determining whether the transmission of a scheduling request is set in one uplink subframe, where acknowledgement information on downlink transmission in a downlink subframe set including M(M≧1) downlink subframes is to be transmitted; and transmitting the acknowledgement information by using a Physical Uplink Control Channel (PUCCH) format and the resource. Here, if there is no Semi-Persistent Scheduling releasing Physical Downlink Control Channel (PDCCH) in the downlink subframe set, if the acknowledgement information corresponds to only one Physical Downlink Shared Channel (PDSCH) indicated by the detection of a corresponding PDCCH received on only a Primary Cell in the downlink subframe set, and if a Downlink Assignment Index value of the PDCCH is 1, the acknowledgement information and the scheduling request may be transmitted using PUCCH format 1b. | 09-05-2013 |
20130238954 | METHOD FOR TRANSMITTING UPLINK CONTROL INFORMATION IN A WIRELESS ACCESS SYSTEM AND TERMINAL FOR SAME - The present invention relates to a method for transmitting uplink control information in a wireless access system and a terminal for the same. More particularly, the method comprises the following steps: attaching, if the bit size of uplink control information is larger than a preset number, cyclic redundancy check to the uplink control information; calculating the number of wireless resource elements for transmitting the uplink control information to which the CRC is attached; coding the uplink control information to which the CRC is attached, using a tail biting convolutional coding (TBCC) technique, based upon the calculated number of the wireless resource elements; and transmitting a physical uplink shared channel signal containing the coded uplink control information to a base station. wherein the uplink control information is either hybrid automatic repeat and request acknowledgement/negative acknowledgement (HARQ-ACK/NACK) information or rank indication (RI) information. | 09-12-2013 |
20130272258 | METHOD AND USER EQUIPMENT FOR TRANSMITTING ACK/NACK INFORMATION, AND METHOD AND BASE STATION FOR RECEIVING ACK/NACK INFORMATION - A method and user equipment (UE) for transmitting ACK/NACK information, and a method and base station (BS) for receiving ACK/NACK information are disclosed. If ACK/NACK repetition and spatial orthogonal-resource transmit diversity (SORTD) caused by 2 antenna ports are configured in the UE, the UE performs first ACK/NACK transmission using 2 PUCCH resources implicitly decided by an associated PDCCH. From the second transmission, the UE performs ACK/NACK transmission using 2 PUCCH resources explicitly assigned respectively for the two antenna ports. | 10-17-2013 |
20130279447 | METHOD AND APPARATUS FOR TRANSMITTING UPLINK REFERENCE SIGNAL IN A MULTI-ANTENNA WIRELESS COMMUNICATION SYSTEM - A method and apparatus for transmitting a Reference Signal (RS) during retransmission at a User Equipment (UE) in a multi-antenna wireless communication system are disclosed. The RS transmission method includes receiving an uplink grant from a Base Station (BS), initially transmitting data and an RS corresponding to each layer based on the uplink grant, receiving ACKnowledgment/Negative ACKnowledgment (ACK/NACK) information for the initially transmitted data, and retransmitting the RS corresponding to each layer and the data according to the ACK/NACK information. The retransmission includes initializing a cyclic shift value for the RS corresponding to each layer according to a cyclic shift field for RSs included in the uplink grant. | 10-24-2013 |
20130279459 | METHOD AND USER EQUIPMENT FOR TRANSMITTING UPLINK CONTROL INFORMATION, AND METHOD AND BASE STATION FOR RECEIVING UPLINK CONTROL INFORMATION - In the present invention, when a user equipment (UE) transmits ACK/NACK information of multiple CCs to a base station (BS), ACK/NACK responses of one CC detected in the order of [ACK, ACK, ACK, ACK], and other ACK/NACK responses of the CC detected in the order of [ACK, DTX, DTX, DTX] are treated to be the same. According to the present invention, control information can be effectively transmitted in a wireless system. | 10-24-2013 |
20130279626 | METHOD FOR TRANSMITTING SOUNDING REFERENCE SIGNAL IN MULTIPLE ANTENNA WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREFOR - A method for transmitting a sounding reference signal from a user equipment in a MIMO antenna wireless communication system is disclosed. The method comprises receiving sounding reference signal setup information from a base station, the sounding reference signal setup information including an initial cyclic shift value n | 10-24-2013 |
20130286993 | APPARATUS FOR TRANSMITTING CONTROL INFORMATION IN A WIRELESS COMMUNICATION SYSTEM AND METHOD THEREOF - The present invention relates to a method of transmitting control information by a user equipment may include the steps of receiving a PDCCH including a CSI request field from the base station via at least one serving cell configured for the user equipment, triggering a report of a 1st control information on an aperiodic CSI to correspond to a value of the received CSI request field, and transmitting the 1st control information and a 2nd control information in a same subframe simultaneously. Moreover, the 1st control information may be transmitted on a PUSCH of the at least one serving cell and the 2nd control information may be transmitted on a PUCCH of the at least one serving cell. | 10-31-2013 |
20130322361 | METHOD AND APPARATUS FOR EFFICIENT FEEDBACK IN WIRELESS COMMUNICATION SYSTEM SUPPORTING MULTIPLE ANTENNAS - The present invention relates to a wireless communication system, and more particularly, to a method and apparatus for efficient feedback in a wireless communication system that supports multiple antennas. According to one embodiment of the present invention, a method for transmitting channel status information, CSI, for a downlink transmission through uplink comprises: generating a rank indicator (RI), a first precoding matrix indicator (PMI), a second PMI anc channel quality indicator (CQI) as the CSI for the downlink transmission; and transmitting at least one of the RI, the first PMI, the second PMI and the CQI according to a predetermined order, wherein, when the RI or the first PMI is dropped, the CSI following the dropped CSI is generated based on a RI or a first PMI transmitted previously, wherein a precoding matrix used for the downlink transmission is determined based on a combination of the first PMI and the second PMI. | 12-05-2013 |
20130322398 | METHOD FOR CODING AND TRANSMITTING UPLINK CONTROL INFORMATION IN A WIRELESS ACCESS SYSTEM - The present invention relates to a method for transmitting channel quality control information using two transmission blocks in a wireless access system that supports hybrid automatic retransmit request (HARQ). The method for transmitting channel quality control information according to one embodiment of the present invention comprises: a step in which a terminal receives a physical downlink control channel (PDCCH) signal including downlink control information (DCI); a step of calculating, using the DCI, the number (Q′) of encoded symbols required for transmitting channel quality control information; and a step of transmitting the channel quality control information via the physical downlink control channel (PDCCH) based on the number of encoded symbols. | 12-05-2013 |
20130343327 | METHOD AND APPARATUS FOR TRANSMITTING CHANNEL QUALITY CONTROL INFORMATION USING PUCCH FORMAT 3 IN A WIRELESS ACCESS SYSTEM - A method of coding and transmitting channel quality control information through a physical uplink control channel (PUCCH) is disclosed. The method of transmitting channel state control information (CQI and/or PMI) in a wireless access system includes performing channel coding with respect to the channel state control information according to a payload size of the channel state control information, performing rate matching with respect to the channel state control information coded through channel coding according to physical uplink control channel (PUCCH) format 3, and transmitting the channel state control information using the PUCCH format 3. | 12-26-2013 |
20140010199 | METHOD FOR TRANSMITTING CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREFOR - A method for transmitting information data by using a Reed-Muller coding scheme in a wireless communication system is provided. The method includes configuring a number of resource elements for transmitting the information data; generating coded information data having a specific bit size by applying RM coding to the information data; performing rate matching to the coded information data so that the rate-matched information data can correspond to the configured resource elements; and transmitting the rate-matched information data by using the configured number of resource elements, where a minimum value Q′ | 01-09-2014 |
20140016546 | METHOD AND DEVICE FOR TRANSMITTING UPLINK CONTROL INFORMATION IN WIRELESS ACCESS SYSTEM - The present invention discloses various methods and devices for transmitting uplink control information in a wireless access system which supports a carrier aggregation environment (i.e., multiple cell environment). The method for transmitting the uplink control information (UCI) in the wireless access system, according to one embodiment of the present invention, comprises the following steps: a user equipment receiving information on at least one cell, which is allocated from the multiple cell environment; the user equipment producing representative rank indicator (RI) information on the at least one cell; the user equipment performing channel encoding on the UCI including the representative RI information and uplink data; and the user equipment transmitting an physical uplink shared channel signal including the UCI, which includes the representative RI information. | 01-16-2014 |
20140056253 | METHOD FOR TRANSMITTING CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREFOR - A method for transmitting information data by using a Reed-Muller coding scheme in a wireless communication system is disclosed. The method includes configuring a number of resource elements for transmitting the information data; dividing the information data to first information data and second information data if a bit size O of the information data is equal to or larger than a predetermined number; applying RM coding on each of the first information data and the second information data; concatenating the coded first information data and the coded second information data, and transmitting the concatenated data by using the predetermined number of resource elements, wherein a minimum value Q′ | 02-27-2014 |
20140056273 | METHOD AND DEVICE FOR TRANSMITTING UPLINK CONTROL INFORMATION HAVING LARGE PAYLOAD IN WIRELESS ACCESS SYSTEM - The present invention relates to a method and devices for transmitting uplink control information (UCI) having a large payload size in a carrier aggregation environment. The method for transmitting the UCI having a large sized payload in a wireless access system, as an embodiment of the present invention, comprises the steps of: finding the number of first resource elements allocated to channel quality information (CQI) information to be included in the UCI; finding the number of second resource elements allocated to a rank indicator (RI) information to be included in the UCI; finding the coding rate of data transmitted with the UCI, considering the number of the first resource elements and the number of the second resource elements; finding the number of third resource elements allocated to all of the UCI, on the basis of the coding rate of the data; and multiplexing to a physical uplink shared channel (PUSCH) and sending to a base station the UCI, on the basis of the number of the third resource elements. | 02-27-2014 |
20140064397 | METHOD AND APPARATUS FOR EFFICIENT FEEDBACK IN A WIRELESS COMMUNICATION SYSTEM SUPPORTING MULTIPLE ANTENNAS - A method and apparatus for performing effective feedback in a wireless communication system supporting multiple antennas. A method for transmitting CSI of downlink transmission via uplink in a wireless communication system includes transmitting a joint-coded rank indicator (RI) and a first wideband (WB) precoding matrix indicator (PMI) at a first subframe, and transmitting a wideband channel quality indicator (WB CQI) and a second WB PMI at a second subframe. A user equipment (UE) preferred precoding matrix is indicated by a combination of the first PMI and the second PMI. If the RI is Rank-1 or Rank-2, the first PMI indicates one of subsets each having 8 indexes from among 16 indexes of the first PMI of a precoding codebook. | 03-06-2014 |
20140079001 | METHOD FOR TRANSMITTING SOUNDING REFERENCE SIGNAL IN MULTIPLE ANTENNA WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREFOR - A method for transmitting a sounding reference signal from a user equipment in a MIMO antenna wireless communication system. The method includes receiving sounding reference signal setup information from a base station, the sounding reference signal setup information including an initial cyclic shift value n | 03-20-2014 |
20140079151 | METHOD FOR TRANSMITTING SOUNDING REFERENCE SIGNAL IN MULTIPLE ANTENNA WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREFOR - A method for transmitting a sounding reference signal from a user equipment in a MIMO antenna wireless communication system. The method includes receiving sounding reference signal setup information from a base station, the sounding reference signal setup information including an initial cyclic shift value n | 03-20-2014 |
20140086352 | METHOD AND APPARATUS FOR EFFICIENT FEEDBACK IN A WIRELESS COMMUNICATION SYSTEM SUPPORTING MULTIPLE ANTENNA - A method and apparatus for transmitting effective channel status information (CSI) in a wireless communication system supporting multiple carriers are disclosed. A method for transmitting CSI of DL transmission via uplink in a wireless communication system includes transmitting a rank indicator (RI) at a first subframe, and transmitting a first precoding matrix indicator (PMI), a second PMI, and a wideband (WB) channel quality indicator (CQI) at a second subframe. UE preferred precoding matrix is indicated by a combination of the first PMI and the second PMI. A subsampled codebook for each precoding codebook of ranks from Rank-1 to Rank-4 is applied to the first PMI and the second PMI, and a sum of the first PMI and the second PMI for each of Rank-1 to Rank-4 is comprised of 4 bits. | 03-27-2014 |
20140092832 | METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more specifically, to an ACK/NACK (Acknowledgement/Negative ACK) transmission method in a wireless communication system and an apparatus therefor. The ACK/NACK transmission method preformed by user equipment in a wireless communication system comprises: receiving a PDCCH (Physical Downlink Control Channel); receiving a PDSCH (Physical Downlink Shared Channel) indicated by the PDCCH; and transmitting an ACK/NACK for the PDSCH. According to the ACK/NACK transmission method and apparatus of the invention. | 04-03-2014 |
20140105156 | METHOD FOR SEARCHING FOR ENHANCED PHYSICAL DOWNLINK CONTROL CHANNEL REGION - The present invention relates to methods for searching an enhanced physical downlink control channel (E-PDCCH), and a device for supporting the methods. According to one embodiment of the present invention, a method for searching an enhanced physical downlink control channel (E-PDCCH) in a wireless access system can comprise the steps of: performing a blind decoding on a control channel region and searching a legacy physical downlink control channel (PDCCH); and searching the E-PDCCH on the basis of the searched legacy PDCCH. In this case, in a subframe to which the E-PDCCH is allocated, using all symbols of the subframe from a first symbol to a third symbol is always preferred for allocation of the legacy PDCCH. | 04-17-2014 |
20140133371 | APPARATUS FOR TRANSMITTING AND RECEIVING DOWNLINK CONTROL INFORMATION IN A WIRELESS ACCESS SYSTEM AND METHOD THEREOF - Disclosed are an apparatus for transmitting and receiving downlink control information in a TDD (time division duplex) wireless access system and method thereof. The present invention includes performing a blind decoding on a transmitting region of e-PDCCH (enhanced physical downlink control channel) transmitted by being multiplexed with PDSCH (physical downlink shared channel) and receiving the DCI through the blind decoding of the e-PDCCH. In particular, a last symbol of the transmitting region of the e-PDCCH in a special subframe is configured in accordance with a configuration of the special subframe. | 05-15-2014 |
20140146799 | METHOD OF TRANSMITTING/RECEIVING DOWNLINK CONTROL INFORMATION AND USER EQUIPMENT THEREFOR IN WIRELESS ACCESS SYSTEM - A method of receiving downlink control information and a corresponding apparatus in a wireless access system supporting an enhanced physical downlink control channel. The method includes receiving, from an eNB, DCI transmission channel information that indicates which one of a physical downlink control channel (PDCCH) and the e-PDCCH is used to transmit the DCI, checking the starting symbol of the e-PDCCH when the DCI transmission channel information indicates that the e-PDCCH is used to transmit the DCI, and receiving the DCI by performing blind decoding on the e-PDCCH from the starting symbol of the e-PDCCH. | 05-29-2014 |
20140153531 | METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION IN A WIRELESS COMMUNICATION SYSTEM - One embodiment of the present invention relates to a method for transmitting control information by a base station, comprising the steps of: transmitting data through a physical downlink shared channel (PDSCH); and receiving a receipt acknowledgement in response to said data in the 4 | 06-05-2014 |
20140177586 | METHOD AND APPARATUS FOR TRANSMITTING UPLINK CONTROL INFORMATION IN WIRELESS ACCESS SYSTEM - The present invention relates to a method for transmitting channel quality control information in a wireless access system, which supports a hybrid automatic repeat request (HARQ), by using two transmission blocks. The method, according to one embodiment of the present invention, comprises the steps of: a terminal receiving a physical downlink control channel (PDCCH) signal including downlink control information (DCI); calculating the number of encoding symbols required for transmitting the channel quality control information by using the DCI; and transmitting the channel quality control information through a physical uplink shared channel (PUSCH) on the basis of the number of the encoding symbols. | 06-26-2014 |
20140185544 | METHOD FOR SEARCHING FOR ENHANCED PDCCH AREA - The present invention relates to a method for searching for an enhanced physical downlink control channel (E-PDCCH), and devices supporting same. The method for searching for an E-PDCCH in a wireless access system, in one embodiment of the present invention, comprises the steps of: blind decoding a control channel area and searching for a legacy PDCCH; obtaining allocation location information of the E-PDCCH using one or more of initiation location information, completion location information, and size information on the allocation area of the legacy PDCCH; and searching for the E-PDCCH using the allocation location information of the E-PDCCH, wherein the E-PDCCH being allocated to a data channel area is more desirable than being allocated to the control channel area. | 07-03-2014 |
20140192753 | METHOD AND APPARATUS FOR ALLOCATING ENHANCED PHYSICAL DOWNLINK CONTROL CHANNEL IN WIRELESS ACCESS SYSTEM - The present invention relates to various methods for allocating and transmitting an enhanced physical downlink control channel, and apparatuses for supporting same. According to one embodiment of the present invention, a method for receiving an enhanced physical downlink control channel (E-PDCCH) in a wireless access system can comprise the steps of: receiving an E-PDCCH indication signal comprising information on the existence of an E-PDCCH signal and resource allocation information, which shows a resource region from which the E-PDCCH is transmitted; and receiving the E-PDCCH signal from the resource region that is shown by the resource allocation information, wherein the E-PDCCH indication signal can be transmitted from a legacy PDCCH region. | 07-10-2014 |
20140198682 | METHOD AND APPARATUS FOR PERFORMING EFFECTIVE FEEDBACK IN WIRELESS COMMUNICATION SYSTEM SUPPORTING MULTIPLE ANTENNAS - A method for transmitting channel status information (CSI) of downlink multi-carrier transmission includes generating the CSI including at least one of a rank indicator (RI), a first precoding matrix index (PMI), a second PMI and a channel quality indicator (CQI) for one or more downlink carriers, the CQI being calculated based on precoding information determined by a combination of the first and second PMIS, determining, when two or more CSIs collide with one another in one uplink subframe of one uplink carrier, a CSI to be transmitted on the basis of priority, and transmitting the determined CSI over a uplink channel. If a CSI including an RI or a wideband first PMI collides with a CSI including a wideband CQI or a subband CQI, the CSI including a wideband CQI or a subband CQI has low priority and is dropped. | 07-17-2014 |
20140204878 | METHOD AND APPARATUS FOR TRANSMITTING CHANNEL QUALITY CONTROL INFORMATION IN WIRELESS ACCESS SYSTEM - Methods and devices for transmitting or receiving channel quality control information through a physical uplink shared channel (PUSCH) in a wireless access system that supports hybrid automatic retransmit request (HARQ) are discussed. The method in one embodiment performed by a user equipment (UE) includes receiving a physical downlink control channel (PDCCH) signal including an initial uplink grant, transmitting uplink data using two transport blocks based on the initial uplink grant, receiving a negative acknowledgement (NACK) information for one of the two transport blocks, and transmitting a channel quality control information along with the one of the two transport blocks which is retransmitted according to the NACK information or a new transport block through the PUSCH to which the HARQ is applied. A number of coded symbols required to transmit the channel quality control information (Q′) is calculated based on the initial uplink grant. | 07-24-2014 |
20140219326 | METHOD AND DEVICE FOR REPORTING CHANNEL STATE INFORMATION IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more specifically, to a method and a device for reporting channel state information. According to one embodiment of the present invention, a method for allowing a terminal to report channel state information (CSI) in a wireless communication system comprises the steps of: reporting a rank indicator (RI); dropping a report of a precoding matrix indicator (PMI) after the RI has been reported; and reporting a channel quality indicator (CQI) after the PMI report has been dropped. Here, a rank value corresponding to the RI may be a changed rank value compared to a rank value corresponding to the most recently reported RI before the RI report. Furthermore, the CQI can be determined on the basis of another precoding matrix, rather than a precoding matrix corresponding to the dropped PMI. | 08-07-2014 |
20140233480 | METHOD AND APPARATUS FOR TRANSCEIVING DATA IN A WIRELESS COMMUNICATION SYSTEM WHICH SUPPORTS A PLURALITY OF COMPONENT CARRIERS - The present disclosure relates to an operating method of a terminal for transceiving data to/from a base station in a system that supports a plurality of component carriers. The method includes receiving, from the base station, downlink control information (DCI) masked using a terminal identifier (cell-radio network temporary identifier (C-RNTI)) or a semi-persistent scheduling terminal identifier (SPS C-RNTI) through a physical downlink control channel (PDCCH); determining a component carrier for transceiving data to/from the base station; and transceiving data to/from the base station through the determined component carrier. The determining includes determining the component carrier which has received the PDCCH as a component carrier for receiving downlink data, and determining an uplink component carrier linked with the component carrier which has received the PDCCH as a component carrier for transmitting uplink data. | 08-21-2014 |
20140233523 | METHOD AND APPARATUS FOR TRANSMITTING CHANNEL STATE INFORMATION USING PUCCH FORMAT 3 IN A WIRELESS ACCESS SYSTEM - The present invention relates to various apparatuses and methods for encoding Channel State Information (CSI) and transmitting the encoded CSI in a wireless access system supporting a multi-cell or multi-carrier environment. The method for user equipment to transmit CSI about two or more cells in a wireless access system includes the steps of: generating CSI bits for two or more cells; encoding each CSI bit for the two or more cells; and periodically transmitting the encoded CSI bit using physical uplink control channel (PUCCH) format 3. | 08-21-2014 |
20140328295 | METHOD AND APPARATUS FOR TRANSCEIVING CONTROL INFORMATION IN A WIRELESS COMMUNICATION SYSTEM - An embodiment of the present invention relates to a method in which a base station transmits a signal in a wireless communication system, said method comprising: a step of allocating downlink control information to either a first slot or a second slot of a subframe; a step of allocating data related to said downlink control information to the slot to which said downlink control information is allocated; and a step of transmitting the subframe including said downlink control information and said data. The downlink control information is allocated to one or more resource block, and the data is allocated to the slot paired with the slot to which the downlink control information is allocated. | 11-06-2014 |
20140334416 | METHOD AND APPARATUS FOR TRANSCEIVING CONTROL INFORMATION IN A WIRELESS COMMUNICATION SYSTEM - An embodiment of the present invention relates to a method in which a terminal receives control information in a wireless communication system, said method comprising: a step of performing blind decoding in at least one portion of a resource region except the time unit indicated by a physical control format indicator channel (PCFICH) on a subframe, said at least one portion of the resource region is determined by whether a synchronizing signal or system information is transmitted or not. | 11-13-2014 |
20140334430 | METHOD AND APPARATUS FOR RECEIVING A DOWNLINK SIGNAL IN A WIRELESS COMMUNICATION SYSTEM SUPPORTING CARRIER AGGREGATION - The present invention relates to a method for receiving a downlink signal at a terminal in a wireless communication system. In particular, the method comprises: receiving a control channel to be transmitted to a specific subframe via a first carrier; and decoding a data channel corresponding to the control channel to be transmitted to the specific subframe via a second carrier, using at least one parameter included in the control channel, wherein information on the orthogonal frequency division multiplexing (OFDM) start symbol of data channels that are transmitted via each of at least one carrier allocated to the terminal is signaled through an upper layer. | 11-13-2014 |
20140341159 | METHOD AND APPARATUS FOR TRANSMITTING UPLINK REFERENCE SIGNAL IN A MULTI-ANTENNA WIRELESS COMMUNICATION SYSTEM - A method for transmitting signals at a User Equipment (UE) in a multi-antenna wireless communication system is discussed. The method includes receiving an uplink grant from a Base Station (BS); transmitting transport blocks and Reference Signals (RSs) for the transport blocks via a plurality of layers based on the uplink grant to the BS; receiving Negative ACKnowledgment (NACK) information for at least one transport block among the transport blocks from the BS; and retransmitting the at least one transport block and the RS for the at least one transport block via at least one layer to the BS. | 11-20-2014 |
20140341312 | METHOD FOR FEEDING BACK CODEBOOK-BASED PRECODING MATRIX INFORMATION IN WIRELESS COMMUNICATION SYSTEM AND DEVICE THEREFOR - A method for feeding back codebook-based precoding matrix information by a receiving side includes estimating a channel through a receiving signal received from a transmitting side; selecting first and second precoding matrix indexes for indicating precoding matrices selected in a predefined codebook based upon said estimated channel; and transmitting said selected first and second precoding matrix indexes to said transmitting side, wherein said predefined codebook supports antenna patterns at the receiving side, precoder (W) in the predefined codebook is expressed as a multiplication of two precoding matrices (W | 11-20-2014 |
20140348099 | METHOD FOR TRANSMITTING DOWNLINK CONTROL CHANNEL BY BASE STATION IN WIRELESS COMMUNICATION SYSTEM, AND DEVICE THEREFOR - Disclosed is a method for transmitting a downlink control channel by a base station in a wireless communication system. More particularly, the method comprises the following steps: setting a transmission resource for transmitting the downlink control channel in a data area of a subframe; mapping one or more first control channels for downlink acknowledgement(ACK)/negative-ACK(NACK) information to the transmission resource; and transmitting the mapped one or more first control channels, wherein the one or more first control channels are mapped to a location adjacent to a terminal specific reference signal existing in the transmission resource. | 11-27-2014 |
20150016382 | METHOD AND APPARATUS FOR PERFORMING TRACKING AREA UPDATE (TAU) BY USER EQUIPMENT (UE) IN C-RAN SYSTEM - A method and apparatus for performing tracking area update (TAU) by a user equipment (UE) in a C-RAN system is disclosed. The method for performing a tracking area update (TAU) by a user equipment (UB) in a Cloud Radio Access Network (C-RAN) includes: transmitting a message, that includes a tracking area update (TAU) indicator indicating a tracking area update (TAU), to a serving Remote Radio Head (S-RRH), wherein the tracking area update (TAU) is performed in units of a Remote Radio Head (RRH) cluster. | 01-15-2015 |
20150023316 | METHOD AND APPARATUS FOR TRANSMITTING SIGNALS OF USER EQUIPMENT (UE) CONFIGURED TO PERFORM D2D COMMUNICATION IN WIRELESS COMMUNICATION SYSTEM - A method for transmitting a signal by a first user equipment (UE) configured to perform device-to-device (D2D) communication in a wireless communication system includes transmitting a signal on a subframe for D2D communication to a second UE configured to perform D2D communication, wherein at least one OFDM symbol from among OFDM symbols contained in the subframe includes a repetition signal. | 01-22-2015 |
20150036558 | METHOD AND APPARATUS FOR TRANSMITTING SIGNALS OF USER EQUIPMENT (UE) CONFIGURED TO PERFORM D2D COMMUNICATION IN WIRELESS COMMUNICATION SYSTEM - A method for transmitting a signal by a device-to-device (D2D) user equipment (UE) configured to perform D2D communication in a wireless communication system includes transmitting a signal after application of a first timing advance (TA) value for D2D communication, wherein the first timing advance (TA) value for the D2D communication is associated with a second timing advance (TA) value applied when the UE transmits an uplink signal to a base station (BS). | 02-05-2015 |
20150036664 | METHOD FOR PERFORMING HANDOVER IN C-RAN SYSTEMS, AND APPARATUS THEREFOR - The present invention relates to a method for a terminal to perform a handover in a cloud radio access network (C-RAN), including the steps of: receiving information on at least one candidate remote radio head (RRH); measuring the strength of received signals from at least one candidate RRH and a serving cell for the terminal; and, when the strength of the received signals from the candidate RRH and the serving cell of the terminal satisfy a predetermined relationship according to the measured result, transmitting feedback information, including the measured result, to the candidate RRH. | 02-05-2015 |
20150036763 | METHOD AND APPARATUS FOR REMOVING COUPLING BETWEEN ANTENNAS IN MULTI-ANTENNA BASED WIRELESS COMMUNICATION SYSTEM - A communication apparatus in a multi-antenna wireless communication system is disclosed. In detail, the communication apparatus includes a first processor for processing a baseband signal defined as a first virtual antenna group, a second processor for mapping a signal defined as a second virtual antenna group and the baseband signal defined as the first virtual antenna group in order to remove coupling between antennas, and an antenna module for mapping the signal defined as the second virtual antenna group and a signal defined as a multiple physical antenna group. | 02-05-2015 |
20150043406 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING SIGNALS IN WIRELESS COMMUNICATION SYSTEM - In a method for a transmission point to transmit a downlink signal to a user equipment in a wireless communication system, the method includes determining transmission power of first resource elements for data transmission of an OFDM symbol which does not include a Cell specific Reference Signal (CRS) and transmission power of second resource elements for data transmission of an OFDM symbol which includes the CRS, wherein a first parameter related to the determination of the transmission power of the first resource elements and a second parameter related to the determination of the transmission power of the second resource elements are determined by one of a first configuration and a second configuration, and wherein the first configuration and the second configuration are selectively applied according to one or more of a subframe and a transmission mode. | 02-12-2015 |
20150043496 | PDCCH MONITORING METHOD AND APPARATUS IN A CARRIER JUNCTION SYSTEM - A method is described for receiving a downlink control information (DCI) from a base station (BS) by a user equipment (UE) in a wireless communication system. The method includes monitoring a plurality of physical downlink control channel (PDCCH) candidates having the same payload size in a common search space and a UE-specific search space on a primary cell to receive the DCI. The common search space and the UE-specific search space are overlapped. If the UE is configured with a carrier indicator field (CIF), the method further includes determining that only a PDCCH in the common search space is transmitted from among the plurality of PDCCH candidates. | 02-12-2015 |
20150043509 | METHOD FOR PERFORMING CHANNEL INTERLEAVING IN A MULTI-ANTENNA WIRELESS COMMUNICATION SYSTEM, AND APPARATUS FOR SAME - A method of transmitting a signal to a base station at a user equipment (UE) in a multi-antenna wireless communication system, can include generating interleaver input vector sequences, wherein the interleaver input vector sequences comprise vectors having a predetermined bit size, mapping the interleaver input vector sequences to an interleaver matrix, generating an output bit sequence by reading the interleaver matrix column by column, and transmitting the output bit sequence to the base station, wherein the predetermined bit size is defined by a product of a modulation order Q | 02-12-2015 |
20150045078 | METHOD FOR D2D TERMINAL TRANSMITTING AND RECEIVING DATA IN WIRELESS COMMUNICATION SYSTEM SUPPORTING DEVICE-TO-DEVICE COMMUNICATION - Disclosed is a method for a device-to-device (D2D) terminal transmitting/receiving data in a wireless communication system supporting D2D communication. The method for the D2D terminal transmitting the data in the wireless communication system supporting D2D communication, comprises the steps of: establishing a link identifier between two D2D terminals and at least one connection identifier between the two D2D terminals; and transmitting the data by including the link identifier and the at least one connection identifier which are established. | 02-12-2015 |
20150049623 | METHOD AND APPARATUS FOR PERFORMING HANDOVER IN C-RAN SYSTEM - A method and apparatus for performing handover by a user equipment (UE) in a C-RAN system is disclosed. The method for performing handover by a user equipment (UE) in a Cloud Radio Access Network (C-RAN) includes: measuring at least one candidate remote radio head (RRH); transmitting feedback information caused by the measurement to a primary RRH; and receiving information regarding a changed primary RRH according to the measurement result received from the primary RRH, wherein the measurement is performed to discriminate each RRH on the basis of a channel state information-reference signal (CSI-RS) antenna port discriminated per the at least one candidate RRH. | 02-19-2015 |
20150049694 | METHOD AND APPARATUS FOR TRANSMITTING/RECEIVING CONTROL INFORMATION FOR DEVICE TO DEVICE (D2D) COMMUNICATION IN A WIRELESS COMMUNICATIONS SYSTEM - According to an embodiment of the present invention, a method for a first terminal to receive control information from a second terminal for device to device communication includes the steps of: receiving downlink control information (DCI) format containing a link indicator; and obtaining selectively one of downlink allocation information and uplink permission information contained in the DCI format according to the link indicator, wherein the downlink allocation information indicates a resource region for receiving data from the second terminal, and the uplink permission information indicates a resource region for transmitting data to the second terminal. | 02-19-2015 |
20150049824 | METHOD FOR PERFORMING HIERARCHICAL BEAMFORMING IN WIRELESS ACCESS SYSTEM AND DEVICE THEREFOR - A method for performing hierarchical beamforming in a wireless access system and a device therefor are disclosed. Particularly, the method comprises: an initial step for allowing a base station to transmit a plurality of first beams, to which different steering vectors are applied, to a terminal through corresponding reference signals, and a repetition step for allowing the base station to transmit a plurality of second beams, to which different steering vectors are applied, to the terminal through corresponding reference signals by considering feedback information that contains an index of one or more beams received from the terminal, wherein the repetition step can be repeated up to a predetermined number of times. | 02-19-2015 |
20150056983 | METHOD AND APPARATUS FOR ESTABLISHING DEVICE-TO-DEVICE CONNECTION IN WIRELESS COMMUNICATION SYSTEM - A method and apparatus for establishing a device-to-device (D2D) connection in a wireless communication system is provided. A first device selects at least one connection identifier (CID) among unused CIDs by the first device and other devices, and transmits a connection establishment request message to a second device. The first device receives a connection establishment response message from the second device. The connection establishment response message includes the D2D peer ID of the first device, the D2D peer ID of the second device, a CID list unused by the second device and a first CID determined by the second device. The first device transmits a connection establishment confirm message including a second CID confirmed by the first device to the second device. | 02-26-2015 |
20150063267 | METHOD AND APPARATUS FOR PERFORMING EFFICIENT FEEDBACK IN WIRELESS COMMUNICATION SYSTEM SUPPORTING MULTIPLE ANTENNA - A method for transmitting channel status information (CSI) of downlink transmission via uplink in a wireless communication system includes transmitting a rank indicator (RI) and a precoder type indicator (PTI) at a first subframe, transmitting at a second subframe a first precoding matrix indicator (PMI) when the PTI has a first value and transmitting a second PMI and a wideband channel quality indicator (WB CQI) when the PTI has a second value, and transmitting at a third subframe a second PMI and a WB CQI when the PTI has a first value and transmitting a subband (SB) CQI and a second PMI when the PTI has a second value. A user equipment (UE) preferred precoding matrix is indicated by a combination of the first PMI and the second PMI. Subsampled codebooks of precoding codebooks of individual Rank-2, Rank-3 and Rank-4 are applied to the second PMI. | 03-05-2015 |
20150080002 | METHOD AND APPARATUS FOR ESTABLISHING DEVICE-TO-DEVICE CONNECTION IN WIRELESS COMMUNICATION SYSTEM - A method and apparatus for establishing, by a first device, a device-to-device (D2D) connection with a second device in a wireless communication system is provided. When the D2D connection is initiated by a network, the first device receives a D2D broadcast configuration message including information on the second device, from the network, and determines whether to establish the D2D connection with the second device or not. Or, when the D2D connection is initiated by the first device, the first device determines whether to establish the D2D connection with the second device or not, based on at least one of a proximity between the first device and the second device based on a profile of the second device obtained through a neighbor discovery procedure. | 03-19-2015 |
20150085747 | METHOD AND APPARATUS FOR ESTABLISHING DEVICE-TO-DEVICE CONNECTION IN WIRELESS COMMUNICATION SYSTEM - A method and apparatus for establishing a device-to-device (D2D) connection in a wireless communication system is provided. A first device may establish the D2D connection with a second device. The first device only knows information on neighbor devices of the first device, and a network does not know the information on neighbor devices of the first device. The first device determines whether to establish the D2D connection with the second device or not, based on at least one of a proximity between the first device and the second device based on a profile of the second device obtained through a neighbor discovery procedure, a presence of data to be transmitted to the second device, and a preference for the D2D connection of the first device. | 03-26-2015 |