Patent application number | Description | Published |
20130242896 | METHOD AND APPARATUS FOR RECEIVING A SIGNAL IN A WIRELESS COMMUNICATION SYSTEM THAT SUPPORTS MU-MIMO SCHEME - A method and apparatus for receiving a signal in a wireless communication system, which supports MU-MIMO scheme, is disclosed to maximize a signal-to-interference and noise ratio (SINR) for a received signal. The method for receiving a signal through a user equipment in a wireless communication system, which supports multi-user-MIMO (MU-MIMO) scheme, comprises the steps of calculating a channel matrix on the basis of a reference signal included in a signal received from a base station; calculating a first vector having maximum channel gain in a vector space formed by the channel matrix; determining a second vector, which minimizes a quantization error with the channel matrix, by using a precoding codebook; calculating a third vector located between the first vector and the second vector, indicating an effective channel having a maximum signal-to-interference plus noise ratio (SINR) for the received signal; and processing the received signal by using a received weight vector determined on the basis of the third vector. | 09-19-2013 |
20140140297 | METHOD AND APPARATUS FOR MITIGATING INTERFERENCE IN WIRELESS COMMUNICATION SYSTEM - A method for mitigating interference in a wireless communication system includes a first transmission point determining the number of subframes that need to be shifted at a second transmission point using information from the second transmission point for an ABSconfiguration, wherein the ABS configuration is for a UE belonging to a third transmission point. | 05-22-2014 |
20140140323 | METHOD AND APPARATUS FOR PERFORMING HANDOVER IN WIRELESS COMMUNICATION SYSTEM - A method and apparatus for performing a handover in a wireless communication system are disclosed. The method for performing a handover of a user equipment (UE) in a wireless communication system includes measuring a first reception power from a first transmission point and a second reception power from a second transmission point; and determining transmission of a measurement report for the handover to the second transmission point. The transmission of the measurement report is determined using the first reception power, the second reception power, an offset value, and a value related to uplink transmission power of the user equipment (UE). | 05-22-2014 |
20140161110 | METHOD AND DEVICE FOR ALLOCATING MULTI TRANSMISSION TIMING TO AT LEAST ONE TIMING ADVANCE GROUP IN A WIRELESS ACCESS SYSTEM FOR SUPPORTING CARRIER AGGREGATION - The present invention relates to methods of allocating a Timing Advance (TA) value used for at least one timing advance group in a wireless access system for supporting carrier aggregation (CA). According to one embodiment of the present invention, a method of adjusting transmission timing for at least one TA group in a wireless access system for supporting CA includes: receiving, by a terminal, a physical downlink control channel (PDCCH) signal including a reserved bit indicating at least one TA group; receiving a medium access control (MAC) message including at least one TA value corresponding to at least one TA group; and transmitting an uplink signal by applying a TA value corresponding to a TA group in the TA group that the reserved bit indicates. At this point, each of the at least one TA group may include at least one primary cell. | 06-12-2014 |
20140169276 | METHOD FOR GENERATING SEQUENCE IN WIRELESS COMMUNICATION SYSTEM - A method for generating a sequence in a wireless communication system includes generating a bit sequence from combined bits of reception acknowledgements for each of a first transport block and a second transport block according to a predetermined coding rate, mapping the bit sequence to modulation symbols to generate a block of modulation symbols, and generating a sequence of modulation symbols by applying an orthogonal sequence repeated n times to the block of modulation symbols. | 06-19-2014 |
20140169315 | METHOD FOR TRANSMITTING CONTROL INFORMATION AND APPARATUS FOR SAME - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method for transmitting uplink control information, and to an apparatus for the method, wherein the method comprises the steps of: generating a plurality of HRAQ-ACKs; selecting, from among a plurality of resource indices, one first resource index, and two second resource indices, each corresponding to the plurality of HARQ-ACKs; transmitting, through a first antenna port, a first modulation symbol corresponding to the plurality of HARQ-ACKs and a first reference signal for demodulating the first modulation symbol; and transmitting, through a second antenna port, a second modulation symbol corresponding to the plurality of HARQ-ACKs and a second reference signal for demodulating the second modulation symbol. Both a transmission resource for the first modulation symbol and a transmission resource for the first reference signal are given using said one first resource index. A transmission resource for the second modulation symbol is given using one of said two second resource indices, and a transmission resource for the second reference signal is given using the other of said two second resource indices. | 06-19-2014 |
20140169361 | METHOD FOR TRANSMITTING AND RECEIVING SYNCHRONIZATION SIGNALS IN WIRELESS ACCESS SYSTEM AND APPARATUS THEREFOR - The present invention relates to a method for transmitting and receiving synchronization signals in a wireless access system for supporting carrier aggregation/multiple cells (CA) and an apparatus therefor. Specifically, the present invention includes the steps of transmitting a first synchronization signal through an extension carrier which is not operated as a single carrier but is operated as a part of the CA, wherein a transmission area of the first synchronization signal differs from a transmission area of a second synchronization signal which is transmitted through a legacy carrier capable of being operated as the single carrier. | 06-19-2014 |
20140192759 | METHOD OF INDICATING A CONTROL CHANNEL IN A WIRELESS ACCESS SYSTEM, BASE STATION FOR THE SAME AND USER EQUIPMENT FOR THE SAME - Disclosed are a method of transmitting a control channel in a wireless access system and a base station for the same. In transmitting a control channel of a 1st base station in a wireless communication system, the present invention includes receiving E-PDCCH (enhanced-physical downlink control channel) including a downlink scheduling information in a data region from a 2nd base station, assigning E-PDCCH including a downlink scheduling information of the 1st base station to the data region based on the downlink scheduling information received from the 2nd base station, and transmitting the downlink scheduling information of the 1st base station to the 2nd base station. | 07-10-2014 |
20140211753 | METHOD AND APPARATUS FOR TRANSRECEIVING SYNCHRONIZATION SIGNAL IN WIRELESS COMMUNICATION SYSTEM - One embodiment of the present invention relates to a method for a terminal acquiring synchronization in a wireless communication system, comprising the steps of: receiving a first signal from on a first carrier; receiving a second signal, which is positioned on a resource element having a predetermined pattern, from at least one subframe from subframes excluding the subframe that receives the first signal; and acquiring synchronization with respect to the first carrier by using the first signal and the second signal. | 07-31-2014 |
20140233541 | BUNDLING SCHEDULING METHOD IN WIRELESS ACCESS SYSTEM AND APPARATUS THEREFOR - The present invention relates to a bundling scheduling method in a wireless access system and an apparatus therefor. Specifically, the bundling scheduling method in the wireless access system comprises the steps of: transmitting the bundled downlink control information including a plurality of downlink control information through one physical downlink control channel (PDCCH) to a terminal; transmitting the downlink data, to the terminal, through a plurality of physical downlink shared channels (PDSCH) scheduled by the bundled downlink control information; and receiving acknowledgement/negative-acknowledgement (ACK/NACK) information for the plurality of PDSCHs from the terminal. | 08-21-2014 |
20140301336 | METHOD FOR TRANSCEIVING PREAMBLE IN WIRELESS ACCESS SYSTEM AND APPARATUS FOR SAME - Disclosed are a method for transceiving a preamble in a wireless access system that supports a carrier aggregation/multi cells, and an apparatus for the same. More particularly, the method of the present invention comprises a step of transmitting a preamble to a terminal via an extension carrier that does not operate as a single carrier but operates only as a portion of a carrier aggregation. The preamble is generated based on a pseudo-random sequence. | 10-09-2014 |
20140307696 | METHOD AND DEVICE FOR OBTAINING AND RECEIVING CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM - A method of obtaining control information on a terminal in a wireless communication system according to an embodiment of the present invention includes performing blind decoding for a joint DCI format including at least two DCI formats for at least two terminals including the terminal, wherein the size of the joint DCI format is determined depending on the kind of the at least two DCI formats, and the terminal further receives information for performing blind decoding on the DCI format for the terminal in the joint DCI format. | 10-16-2014 |
20140307729 | METHOD FOR INDICATING CONTROL CHANNEL IN WIRELESS ACCESS SYSTEM, AND BASE STATION AND USER EQUIPMENT FOR THE SAME - A method for transmitting/receiving data in a wireless access system, and a base station (BS) and a user equipment (UE) for the same are disclosed. The method for performing synchronization with a neighbor base station (BS) of a user equipment (UE) in a wireless access system includes, if a user equipment (UE) based on a macro BS is located at a boundary of the neighbor BS, measuring a synchronization channel of the neighbor BS, wherein a subframe of the neighbor BS includes an additional secondary synchronization signal (SSS) so as to perform synchronization with the neighbor BS. | 10-16-2014 |
20140321408 | METHOD AND APPARATUS FOR RECEIVING DATA USING EXTENSION CARRIER IN WIRELESS ACCESS SYSTEM - Disclosed are a method and an apparatus for receiving data using an extension carrier in a wireless access system that supports a carrier aggregation/multiple cells. A method in which a terminal receives data in a wireless access system that supports a carrier aggregation according to one embodiment of the present invention comprises: a step of receiving data starting point information indicating the symbol in a subframe at which a transmission of said data starts when data is transmitted via a secondary carrier that constitutes the carrier aggregation together with a primary carrier; and a step of receiving said data via the secondary carrier based on the data starting point information. The symbol at which the transmission of said data starts is determined from any one of a plurality of symbols including a first symbol of the subframe. | 10-30-2014 |
20140321422 | METHOD AND APPARATUS FOR TRANSMITTING A SIGNAL 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, comprising: a step of generating a reception acknowledgement response to the uplink data received from a terminal; and a step of mapping the reception acknowledgement response to a downlink time-frequency resource and transmitting the mapped result. The downlink time-frequency resource is located on a resource region excluding the control region indicated by a physical control format indicator channel, and associated with the index of the resource block with which the uplink data is transmitted. | 10-30-2014 |
20150023263 | METHOD FOR REDUCING INTERFERENCE OF USER EQUIPMENT IN WIRELESS ACCESS SYSTEM, AND THE USER EQUIPMENT FOR THE SAME - A method for reducing interference of a user equipment (UE) in a wireless access system, and the user equipment (UE) for the same are disclosed. The method for reducing interference of a UE includes receiving a signal from a first base station (BS) and a second BS; and detecting a signal of the second BS from the reception signal, wherein allocation resources of the detection signal of the second BS is OFDM-symbol-level-shifted according to a physical broadcast channel (PBCH) of the first BS in such a manner that a control region does not overlap with another part. | 01-22-2015 |
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 |