Patent application number | Description | Published |
20100302978 | METHOD OF INDICATING NUMBER OF ANTENNAS IN NETWORK BROADCAST SYSTEM - A method for generating a broadcast signal includes forming an information block for transmission, the information block including a first field comprising a plurality of bits configured to impart information to a first group of user equipment (UEs) regarding a first evolved NodeB (eNodeB) transmit antenna configuration. The method further includes generating error detection bits based upon the information block and scrambling the error detection bits using a mask according to a second eNodeB transmit antenna configuration, such that the mask is configured to impart information to a second group of UEs regarding the second eNodeB transmit antenna configuration. The method also includes generating the broadcast signal having the information block and the scrambled error detection bits, and transmitting the generated broadcast signal via a packet broadcast control channel. | 12-02-2010 |
20120218960 | METHOD FOR SELECTING PMI FOR NON-ADAPTIVE HARQ OPERATION IN A MIMO WIRELESS COMMUNICATION SYSTEM - A method for transmitting an uplink signal at a User Equipment (UE) in a wireless communication system includes receiving, from a Base Station (BS), an uplink scheduling grant for multi-antenna transmission; transmitting the uplink signal precoded using precoding information included in the received uplink scheduling grant to the BS; and retransmitting the uplink signal to the BS according to Acknowledgment/Negative Acknowledgment (ACK/NACK) corresponding to the transmitted uplink signal. The retransmitted uplink signal is precoded using precoding information included in a most recent uplink scheduling grant or a predetermined precoding matrix if an uplink scheduling grant for the retransmission is not received from the BS. | 08-30-2012 |
20120320816 | METHOD AND APPARATUS FOR DETERMINING SIZE OF TRANSPORT BLOCK TRANSMITTED BY BASE STATION TO RELAY NODE IN RADIO COMMUNICATION SYSTEM - A method for receiving a Relay node dedicated Physical Downlink Shared Channel (R-PDSCH) from a base station by a relay node in a radio communication system is disclosed. The method includes receiving, from the base station, a Modulation and Coding Scheme (MCS) index and the number NR-PDSCHPRB1 of first resource blocks to which the R-PDSCH is transmitted, under the assumption that a Relay node dedicated Physical Downlink Control Channel (R-PDCCH) is not transmitted, estimating the number NR-PDSCHPRB2 of second resource blocks to which the R-PDSCH is actually transmitted, using the number NR-PDSCHPRB1 of the first resource blocks and using the number NR-PDCCHPRB of resource blocks to which the R-PDCCH is transmitted, selecting the size of a transport block mapped to the R-PDSCH, using the number NR-PDSCHPRB2 of the second resource blocks and using a transport block index corresponding to the MCS index, and decoding the R-PDSCH, using the size of the transport block and using a modulation order corresponding to the MCS index. | 12-20-2012 |
20120327884 | APPARATUS FOR TRANSMITTING AN UPLINK SIGNAL AND METHOD THEREOF - An apparatus for transmitting an uplink signal and method thereof are disclosed, by which an uplink signal can be efficiently transmitted in a wireless communication system. The present invention includes receiving a downlink control information (DCI) used for PUSCH (physical uplink shared channel) scheduling, the DCI including an information for resource block allocation, an information for a channel status information request and a plurality of MCS (modulation and coding scheme) informations for a plurality of transport blocks and if a condition is met, transmitting a channel status information only on the PUSCH without a transport block for UL-SCH (uplink shared channel). Moreover, the condition includes a case that: only one transport block is enabled, the MCS information for the enabled transport block indicates an MCS index 29, the information for the channel status information request indicates 1, and the number of allocated resource blocks is equal to or smaller than 4. | 12-27-2012 |
20130059588 | METHOD FOR SWITCHING SERVICE OF MANAGEMENT DEVICE SERVING NETWORK OR DEVICE - Disclosed is a method for smoothly switching between services to allow networks or devices to coexist. The method of switching between services of a television band device (TVBD) network or device includes: receiving a request for switching between services of the TVBD network or device from a coexistence manager (CM); and transmitting a response with respect to the request to the CM, wherein the services include an information service obtaining, by the TVBD network or device, neighbor information of the TVBD network or device from the CM and a management service providing measurement results to the CM by the TVBD network or device, and the response includes an indicator indicating whether or not the request has been successfully processed. | 03-07-2013 |
20130070642 | METHOD AND APPARATUS FOR TRANSCEIVING DATA IN A WIRELESS LAN SYSTEM - The present description relates to a method in which a station transmits data in a wireless LAN system, comprising the following steps: receiving, from an access point, control information containing station group configuration information, which indicates the configurations of station groups and uplink resource allocation information on the resource allocated to each station group; determining, on the basis of the control information, the station group to which the station belongs; and transmitting uplink data to the access point by contending with other stations in the determined station group. | 03-21-2013 |
20130163405 | METHOD FOR SELECTING PMI FOR NON-ADAPTIVE HARQ OPERATION IN A MIMO WIRELESS COMMUNICATION SYSTEM - A method for transmitting an uplink signal at a User Equipment (UE) in a wireless communication system includes receiving, from a Base Station (BS), an uplink scheduling grant for multi-antenna transmission; transmitting the uplink signal precoded using precoding information included in the received uplink scheduling grant to the BS; and retransmitting the uplink signal to the BS according to Acknowledgment/Negative Acknowledgment (ACK/NACK) corresponding to the transmitted uplink signal. The retransmitted uplink signal is precoded using precoding information included in a most recent uplink scheduling grant or a predetermined precoding matrix if an uplink scheduling grant for the retransmission is not received from the BS. | 06-27-2013 |
20130163495 | SCHEDULING METHOD FOR MACHINE-TO-MACHINE COMMUNICATION - One embodiment of the present invention provides a scheduling method for machine-to-machine (M2M) communication. The method comprises the steps of: receiving a connection request message from each of a plurality of machines; grouping the plurality of machines into one or more groups; transmitting information on the group to which each machine belongs, to the machine; transmitting information on the machines belonging to each group, and control information including information on a time interval allocated to each group, to machines belonging to each group; and communicating with machines belonging to each group in a time interval allocated to each group. | 06-27-2013 |
20130237192 | ACCESS METHOD BETWEEN A TERMINAL AND A BASE STATION IN A WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREOF - The present description relates to a method in which a terminal accesses a base station in a wireless communication system and to a terminal thereof. The method includes broadcasting, to at least one base station, an advertisement message containing identification information for advertising existence of the terminal; receiving, from the base station, an inviting message which allows access to the base station; and performing an access procedure with the base station in accordance with the received inviting message. The present description further relates to a method in which a base station accesses a terminal in a wireless communication system, the method including receiving an advertisement message which is broadcasted by the terminal and contains identification information for advertising existence of the terminal; transmitting, to the terminal, an inviting message which allows access to the base station; and performing an access procedure with the terminal in accordance with the inviting message. | 09-12-2013 |
20140018114 | METHOD FOR SWITCHING SERVICE OF MANAGEMENT DEVICE SERVING NETWORK OR DEVICE - Disclosed is a method of switching between services of a television band device (TVBD) network or device of an apparatus including a coexistence manager (CM), including: transmitting, by the CM, a request for switching between services of the TVBD network or device to the TVBD network or device; and receiving, by the CM, a response with respect to the request from the TVBD network or device. Here, the services include an information service obtaining neighbor information from the CM by the TVBD network or device and a management service providing measurement results to the CM by the TVBD network or device, and the response includes an indicator indicating whether or not the request has been successfully processed. | 01-16-2014 |
20140029600 | METHOD AND APPARATUS FOR GENERATING TRAFFIC INDICATOR MAP IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method and an apparatus for generating a traffic indicator map in a wireless communication system, as described below, and the method comprises the following steps: dividing into at least one group a virtual bitmap comprising displayed values of association IDs (AIDs) of stations that are coupled to an access point; saving a first portion, which includes a first display value but does not include a first AID for receiving data from the access point, in a virtual bitmap of each of the divided groups as an offset value in a bitmap control field, the first portion including a first display value but not including a first AID for receiving data from the access point; setting a second portion from the virtual bitmap of each of the divided groups as a partial virtual bitmap field, the second portion being the portion excluding the first portion; and generating the traffic indicator map including the bitmap control field and the partial virtual bitmap field for each of the divided groups. | 01-30-2014 |
20140036727 | ROUTING METHOD AND APPARATUS FOR SETTING OPTIMUM MULTI-HOP HYBRID V-MIMO TRANSMISSION PATH FOR WIRELESS AD HOC NETWORK - The present invention relates to a method for setting the optimum transmission path for increasing energy efficiency in a wireless ad hoc network. More particularly, the present invention relates to setting an optimized data transmission path in a multi-hop data transmission environment in a wireless network comprising machine to machine (M2M) communication devices, which operate with limited energy, based on link information of the network, such as the position of a node in the network. And to this end, the present invention relates to a wireless M2M communication network protocol minimizing energy consumption by selecting the optimum transmission method for each of the hops from the following transmission methods: a single input single output (SISO) method; a virtual single input multiple output (V-SIMO) method; and a virtual multiple input multiple output (V-MIMO) method. | 02-06-2014 |
20140038657 | RESOURCE ALLOCATION IN A COEXISTENCE SYSTEM - One embodiment disclosed in the present description relates to a coexistence manager which can adaptively select channels in a coexistence environment between disparate systems with channel use constraints that inherently exist with use of TVWS. Accordingly, the embodiment disclosed in the present description provides a resource allocation method for a manager device, comprising the steps of: receiving a channel allocation request from a first network or device; determining a second network or device for switching channels based on the benefits of each channel or device, if a channel cannot be assigned to the first network or device; switching the channel used by the second network or device to another channel and raising its priority; and assigning the channel used by the second network or device to the first network or device. | 02-06-2014 |
20140044118 | METHOD AND DEVICE FOR TRANSMITTING A SYNCHRONIZATION SIGNAL IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method and device for an access point to transmit a signal in a wireless communication system. A method for an access point to transmit a synchronization signal includes: generating a frame for synchronizing a timer of a station connected to an access point; and transmitting the frame for synchronization. The frame for synchronization may be transmitted before/after all Target Beacon Transmission Times. | 02-13-2014 |
20140066086 | FREQUENCY BAND DETERMINATION METHOD IN COEXISTENCE SCHEME - According to one embodiment of the present invention, provided is a frequency band (FB) determination method of a wireless access device which provides an access point to enable one or more terminals to wirelessly access a network. The method may comprise the steps of receiving database-related information from database servers which have database related to unused FBs of a television broadcasting band (TVBB), determining a database server to be accessed among the database servers on the basis of the database-related information, requesting the determined database server and receiving information on available FBs, and determining FBs, among the received operating FBs, for the one or more terminals. The operating FBs are determined by the database server so that the wireless access device can coexist with a neighboring homogeneous or heterogeneous wireless access device without mutual interference within the TVBB. | 03-06-2014 |
20140092863 | METHOD AND DEVICE FOR SCHEDULING A WIRELESS PERSONAL AREA NETWORK - The present specification sets forth a method for a device to transmit data in a wireless personal area network (WPAN), comprising the steps of: transmitting a transmission-band request message for transceiving non-contention data between a first coordinator and a second coordinator, the second coordinator operating in a different frequency channel from the first coordinator; switching an operating channel to the different frequency channel; receiving transmission-band allocation information corresponding to the transmission-band request message from the second coordinator through the switched different frequency channel; and transceiving data to/from the second coordinator according to the transmission-band allocation information. | 04-03-2014 |
20140126558 | SCHEDULING METHOD AND DEVICE HAVING CONTINUITY IN A WIRELESS PERSONAL AREA COMMUNICATION NETWORK - The present description discloses a method for a first device to transmit data in a WPAN (wireless personal area network), comprising the steps of: transmitting, to a second device, a message requesting a transmission bandwidth for transceiving non-competitive data of a first device; receiving, from the second device, transmission bandwidth allocation information corresponding to the message requesting the transmission bandwidth; and transceiving data to/from the second device according to the transmission bandwidth allocation information, wherein the transmission bandwidth allocation information may include length, gap, and window information on the transmission bandwidth for non-competitive transception. | 05-08-2014 |
20140128000 | Method for Channel Searching in a Medical Body Area Network - Provided is a method for channel searching for enabling a medical body area network (MBAN) terminal, which operates in an allocated frequency band, to use another frequency band. The method may comprise the steps of receiving an identifier of a specific channel group, from among a plurality of channel groups, from an MBAN coordinator in the allocated frequency band; and searching for a channel in a channel group relating to the received identifier of the channel group in a different frequency band. The identifier of the channel group indicates a channel group including channels that the terminal preferentially searches for in the other frequency band. | 05-08-2014 |
20140140267 | METHOD OF OPERATING RELAY STATION IN WIRELESS COMMUNICATION SYSTEM - A method of operating a relay station in a wireless communication system is provided. The method includes operating in a first mode comprising a first sub-mode and a second sub-mode, in the first sub-mode a first downlink and a first uplink between a base station and the relay station being simultaneously activated, in the second sub-mode a second downlink and a second uplink between the relay station and a mobile station being simultaneously activated, and operating in a second mode comprising a third sub-mode and a fourth sub-mode, in the third sub-mode the first downlink and the second uplink being simultaneously activated, in the fourth sub-mode the first uplink and the second downlink being simultaneously activated. | 05-22-2014 |
20140148100 | METHOD FOR CHANNEL SWITCHING IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREFOR - The present invention provides a method for switching an operating channel of a device in a wireless personal area network (WPAN) system, and an apparatus therefor. Specifically, the method includes the steps of: setting an association with a first frequency band coordinator; receiving channel switching information from the first frequency band coordinator; channel switching to a second frequency-band channel using the received channel switching information; and setting an association with a second frequency band coordinator, wherein the channel switching information includes a residual time with a time limit which channel switches from a first frequency band to a second frequency band, an operating channel in the second frequency band, and a prearranged transmission time of a beacon frame in the operating channel in the second frequency band. | 05-29-2014 |
20140169297 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING MCS INDEX FOR 256QAM IN WIRELESS ACCESS SYSTEM - A method and apparatus for transmitting and receiving an MCS index for 256 QAM in a wireless access system are disclosed, which relate to methods for transmitting and receiving a Modulation and Coding Scheme (MCS) index supporting a 256 Quadrature Amplitude Modulation (QAM) scheme and apparatuses for supporting the same. The method for receiving a Modulation and Coding Scheme (MCS) index for 256 QAM (Quadrature Amplitude Modulation) in a wireless access system includes: receiving, by a user equipment (UE), a message including a 256 QAM indicator indicating use of a 256 QAM scheme; and receiving a physical downlink control channel (PDCCH) signal including the MCS index, wherein the UE obtains a modulation order and a Transport Block Size (TBS) index depending upon the MCS index for the 256 QAM scheme | 06-19-2014 |
20140169300 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING CHANNEL STATUS INFORMATION (CSI) FOR SUPPORTING 256QAM IN WIRELESS ACCESS SYSTEM - A method and apparatus for transmitting and receiving channel status information (CSI) for supporting 256QAM in a wireless access system are disclosed. A method for transmitting a Channel Quality Indication (CQI) index for 256QAM (Quadrature Amplitude Modulation) in a wireless access system includes: receiving, by a user equipment (UE), a message including a 256QAM indicator indicating use of a 256QAM scheme; performing channel measurement of a downlink channel through which downlink data is transmitted; and transmitting a CQI index in response to the channel measurement result to a base station (BS), wherein the UE simultaneously manages a first CQI feedback table for supporting a legacy modulation scheme and a second CQI feedback table for supporting the 256QAM scheme. | 06-19-2014 |
20140206407 | METHOD AND DEVICE FOR DISCOVERING NEIGHBORS FOR WIRELESS FIDELITY DIRECT (WFD) PEER TO PEER (P2P) COMMUNICATION - The present invention relates to a wireless communication system. In particular, the present invention relates to a method and device for performing the process of discovering neighbors for Wi-Fi P2P communication, the method including the steps of: checking at a first WFD P2P device whether there is WFD P2P group in which participation is possible; performing, at the first WFD P2P device, the operation for participating in the WFD P2P group in which participation is possible, if there is a WFD P2P group in which participation is possible, or performing, at the first WFD P2P device, the operation for creating a new WFD P2P group or entering a sleep mode, if there is no WFD P2P group in which participation is possible, wherein the operation for participating in the WFD P2P group in which participation is possible includes the steps of receiving information about a neighbor list on a second WFD P2P device (or devices) within the WFD P2P group from a specific WFD P2P device that manages the WFD P2P group, and periodically transferring neighbor advertisement information on the first WFD P2P device to the specific WFD P2P device, after receiving the neighbor list. | 07-24-2014 |
20140241286 | METHOD FOR SELECTING PMI FOR NON-ADAPTIVE HARQ OPERATION IN A MIMO WIRELESS COMMUNICATION SYSTEM - A method for transmitting an uplink signal at a User Equipment (UE) in a wireless communication system includes receiving, from a Base Station (BS), an uplink scheduling grant for multi-antenna transmission; transmitting the uplink signal precoded using precoding information included in the received uplink scheduling grant to the BS; and retransmitting the uplink signal to the BS according to Acknowledgment/Negative Acknowledgment (ACK/NACK) corresponding to the transmitted uplink signal. The retransmitted uplink signal is precoded using precoding information included in a most recent uplink scheduling grant or a predetermined precoding matrix if an uplink scheduling grant for the retransmission is not received from the BS. | 08-28-2014 |
20140247817 | SCHEDULING METHOD IN WIRELESS COMMUNICATION SYSTEM AND DEVICE THEREFOR - The present invention provides a scheduling method in a wireless personal area network (WPAN) system and a device therefor. Specifically, a method for allocating a guaranteed time slot (GTS) in a WPNA system comprises the steps of: receiving a GTS request command for requesting periodic GTS allocation from a device; and transmitting a beacon frame which includes periodic GTS allocation information to the device, wherein a GTS allocation interval is determined by GTS interval information included in the GTS request command, and an allocated periodic GTS expires if data or an acknowledgement (ACK) frame is not transmitted from the device within a section determined by the GTS allocation interval. | 09-04-2014 |
20140301552 | METHOD FOR WIRELESS LOCAL AREA NETWORK (WLAN)-BASED PEER TO PEER (P2P) COMMUNICATION AND APPARATUS FOR SAME - Abstract: The present invention relates to a wireless communication system. More particularly, the present invention relates to a method for performing WLAN-based P2P communication at the state where a P2P apparatus is connected to a cellular network and to a first P2P apparatus for the method. The method comprises: a step of receiving one or more pieces of key information from a cellular base station, each piece of key information including a key value corresponding to service identification information; a step of receiving an encryption data signal from a second P2P apparatus; and a step of performing a process of attempting to decrypt said encrypted data signal using one or more keys corresponding to one or more services in which said first P2P apparatus is interested, from among said one or more pieces of key information. | 10-09-2014 |
20150016239 | METHOD AND APPARATUS FOR SETTING REFERENCE SIGNAL - Disclosed are a method and an apparatus for setting a reference signal. A wireless apparatus receives a primary synchronization signal (PSS) transmitted by a first orthogonal frequency division multiplexing (OFDM) symbol and a secondary synchronization signal (SSS) from a second OFDM symbol, and can search information for setting a reference signal on the basis of symbol numbers of the first OFDM symbol and the second OFDM symbol. Inter-cell interference can be reduced by means of a variety of methods for setting a reference signal. | 01-15-2015 |
20150016315 | METHOD FOR TRANSRECEIVING SIGNALS 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 in a wireless communication system supporting carrier aggregation (CA), and to an apparatus for same, comprising the steps of: establishing a first cell having a first time division duplex (TDD) uplink-downlink (UL-DL) configuration and a second cell having a second TDD UL-DL configuration; receiving data through a DL subframe of the first cell; and transmitting reception reply information with respect to the data through a UL subframe of the second cell. | 01-15-2015 |
20150016373 | METHOD AND APPARATUS FOR TRANSMITTING UPLINK CONTROL INFORMATION - A method for transmitting uplink control information and a wireless device are provided. The wireless device masks the cyclic redundancy check (CRC) of a first piece of uplink control information with a masking sequence related to a second piece uplink control information and transmits the masked first piece of uplink control information to an uplink channel. | 01-15-2015 |
20150016377 | METHOD AND APPARATUS FOR UPLINK TRANSMISSION - Disclosed are a method and an apparatus for uplink transmission. A method for uplink transmission for a machine-type communication (MTC) terminal comprises: a step of transmitting first uplink (UL) information via a first UL channel in a first terminal-specific frequency band of a first subframe; and a step of transmitting second UL information via a second UL channel in a second terminal-specific frequency band of a second subframe subsequent to the first subframe. The first subframe and the second subframe each include a plurality of orthogonal frequency division multiplexing (OFDM) symbols. If the first terminal-specific frequency band and the second terminal-specific frequency band do not overlap one another, the second UL information may not be transmitted in a first OFDM symbol of the second subframe. Thus, a wireless resource can be efficiently utilized. | 01-15-2015 |
20150016408 | METHOD FOR TRANSRECEIVING SIGNALS AND APPARATUS FOR SAME - The present invention relates to a wireless communication system. More specifically, the present invention relates to a method for receiving data on user equipment supporting a plurality of types of carriers in the wireless communication system, and to the apparatus for same, the method comprising the steps of: receiving a transmission mode-common (TM-common) downlink control information (DCI) format including downlink scheduling information; and receiving the data through a resource indicated by the downlink scheduling information, wherein the data is modulated by using a user equipment-specific (UE-specific) reference signal when the data is received through a first type of carrier, and the data is modulated through a first cell-common reference signal when the data is received through second type of carrier. | 01-15-2015 |
20150030037 | METHOD OF CARRYING OUT SYNCHRONIZATION TRACKING AND A WIRELESS DEVICE USING THE SAME - There are provided a method of carrying out synchronization tracking and a wireless device using the same. The wireless device receives CSI-RS (Channel Status Information-Reference Signal) setting for prescribing the CSI-RS from a base station, and TRS (Tracking Reference Signal) setting for prescribing the TRS from the base station. The wireless device tracks the synchronization based on the TRS. | 01-29-2015 |
20150036653 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING DATA - A method and apparatus of transmitting and receiving data is provided. A user equipment receives physical downlink shared channel data on a PDSCH in a second subframe from a second serving cell to the user equipment. The second serving cell is activated by the first serving cell, and the second serving cell does not map the PDSCH data to a second RE corresponding to a first resource element of the first subframe mapped with the CRS. The CRS is generated from a pseudo random sequence that is initiated by a cell identifier of the first serving cell and the PDSCH is indicated by an enhanced physical downlink shared channel of the second subframe, and the second RE of the second subframe and the first RE of the first subframe overlap in a time domain and in a frequency domain. | 02-05-2015 |
20150043462 | METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION - A method and an apparatus for transmitting uplink control information in a wireless communication system are provided. A first Reed-Muller (RM) encoder encodes first uplink control information on the basis of a first RM basis, and a second RM encoder encoded second uplink control information on the basis of a second RM basis. | 02-12-2015 |
20150049687 | METHOD AND APPARATUS FOR COMMUNICATING BY USING DIFFERENT TYPES OF CARRIERS IN RADIO COMMUNICATION SYSTEM SUPPORTING CARRIER AGGREGATION - Provided through the present application are a method and an apparatus for use in a radio communication system, which supports carrier aggregation and carries out communication in subframe units. More specifically, user equipment operating in a first type carrier for receiving from a base station, a first piece of control information, which is related to the first type carrier and a second type carrier that support the carrier aggregation, can measure a radio signal to carry out radio resource management with respect to the first type carrier by using a first reference signal, which is included in the first type carrier, and/or a second reference signal, which is included in the second type carrier. | 02-19-2015 |
20150055521 | METHOD AND DEVICE FOR AGGREGATING CARRIERS IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method and a device for aggregating carriers in a wireless communication system. In the method, a first carrier is configured, and a second carrier is configured in addition to the first carrier. The first carrier is a time division duplex (TDD) carrier for which an uplink subframe and a downlink subframe are positioned at different times in a frame, and the second carrier is a carrier only for an uplink, which consists of uplink subframes. | 02-26-2015 |
20150055574 | METHOD AND APPARATUS FOR TRANSMITTING REFERENCE SIGNAL - Disclosed are a method and an apparatus for transmitting a reference signal. The method for transmitting the reference signal comprises the step of: transmitting a secondary synchronization signal (SSS) and a primary synchronization signal (PSS) from a subframe including an N (natural number wherein N>1) number of resource blocks (RB) and a plurality of orthogonal frequency division multiplexing (OFDM) symbols; and transmitting from the subframe the reference signal which is generated on the basis of a cell identifier, wherein the reference signal can be transmitted from an M (natural number wherein K<=M02-26-2015 | |
20150071099 | Method and Apparatus for Receiving Downlink Data in Wireless Communication System - Provided is a method for receiving downlink data in a wireless communication system. User equipment (UE) receives downlink control information in a first subframe from a primary cell. The user equipment receives downlink data from a secondary cell in a second subframe over a physical downlink shared channel (PDSCH). The user equipment determines a transmission block size in accordance with the type of the carrier of the second subframe. The user equipment decodes the PDSCH on the basis of the downlink control information and the transmission block size. | 03-12-2015 |
20150071206 | METHOD AND APPARATUS FOR TRANSMITTING SOUNDING REFERENCE SIGNALS IN WIRELESS COMMUNICATION SYSTEMS - The present invention relates to a method and apparatus for transmitting sounding reference signals in wireless communication systems. The method includes the steps of: receiving sounding reference signal (SRS) setting information indicating an SRS transmitting scheme for an uplink carrier; and transmitting the SRS in the SRS transmitting scheme determined on the basis of the SRS setting information, wherein the SRS transmitting scheme is intended for transmitting the SRS in all of the bands of the uplink carrier, or in some of the bands of the uplink carrier. | 03-12-2015 |
20150078271 | METHOD AND APPARATUS FOR ESTIMATING CHANNEL IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system. A method for estimating a channel by a user equipment (UE) in a wireless communication system includes receiving information about at least one channel station information (CSI) configuration for reporting CSI of one of a plurality of serving cells, determining that the same precoding matrix is applied to a plurality of resource blocks when all of the at least one CSI configuration is configured to report a precoding matrix indicator (PMI) and a rank indicator (RI), and determining that the precoding matrix is applied to one resource block when CSI configuration configured not to report the PMI and the RI is present among the at least one CSI configuration, and estimating a channel based on a result of the determination. | 03-19-2015 |
20150078285 | METHOD AND APPARATUS FOR RECEIVING DOWNLINK DATA IN A WIRELESS COMMUNICATION SYSTEM - A method for receiving downlink data in a wireless communication system is provided. A user equipment receives downlink control information via a downlink control channel in a subframe. The downlink control information includes reference signal (RS) information and physical downlink shared channel (PDSCH) information. The RS information indicates transmission antenna ports, a scrambling identity and a number of transmission layers. The user equipment receives a RS for demodulating a PDSCH based on the RS information in the subframe. The RS is generated based on the scrambling identity. The user equipment receives downlink data via the PDSCH in the subframe. Resource element (RE) mapping information on REs assigned for the PDSCH is determined based on the PDSCH information. | 03-19-2015 |
20150078465 | METHOD AND APPARATUS FOR TRANSMITTING REFERENCE SIGNALS - Provided is a method for transmitting a reference signal in a time division duplex (TDD)-based wireless communication system. A base station transmits a synchronization signal in a subframe including N resource blocks in a frequency domain, and K (K>1) orthogonal frequency division multiplexing (OFDM) symbols in a time domain. The base station transmits a reference signal generated on the basis of a terminal identifier in the subframe. The subframe includes a downlink pilot time slot (DwPTS), a guard period (GP), and an uplink pilot time slot (UpPTS). The DwPTS includes six OFDM symbols. The UpPTS includes two OFDM symbols. The reference signal is transmitted in the first OFDM symbol or the sixth OFDM symbol in the subframe | 03-19-2015 |
20150085782 | METHOD AND APPARATUS FOR MAKING HARQS IN CARRIER AGGREGATION SYSTEMS - The present invention relates to a method and system for making a hybrid automatic repeat requests (HARQ) in a carrier aggregation system. The method receives downlink data through a first subframe of a first carrier, transmits acknowledgement/negative-acknowledgement (ACK/NACK) for the downlink data through a second subframe of a second carrier, and re-receives the downlink data through a third subframe of the first carrier, wherein the first carrier only includes the downlink subframes, and the second carrier includes the uplink subframes and the downlink subframes. | 03-26-2015 |
20150085785 | DATA TRANSMISSION METHOD AND DATA TRANSMISSION DEVICE - A data transmission method and a data transmission device are disclosed. A method for receiving control data by a terminal can comprise the steps of demodulating downlink control information (DCI) including an assignment flag and downlink (DL) resource allocation; and demodulating physical downlink shared channel (PDSCH) data by using the DL resource allocation, wherein when the PDSCH data is demodulated on the basis of a demodulation reference signal (DM-RS), the assignment flag indicates information on a reference signal (RS) used for the demodulation of the PDSCH data or information on a PDSCH transmission antenna port. | 03-26-2015 |
Patent application number | Description | Published |
20100041409 | Method of transmitting data in multi-cell cooperative wireless communication system - A method of transmitting data in a multi-cell cooperative wireless communication system is provided. The method includes dividing the data into common data and private data, determining a transmission rate and/or a transmission power of the common data and the private data, respectively and transmitting the common data and the private data at the determined transmission rate and/or transmission power. It is possible to mitigate inter-cell interference and improve the performance of the system. | 02-18-2010 |
20120287875 | METHOD AND APPARATUS FOR PROVIDING CHANNEL STATE INFORMATION-REFERENCE SIGNAL (CSI-RS) CONFIGURATION INFORMATION IN A WIRELESS COMMUNICATION SYSTEM SUPPORTING MULTIPLE ANTENNAS - A method and apparatus for transmitting and receiving a Channel State Information-Reference Signal (CSI-RS) in a wireless communication system supporting multiple antennas are disclosed. The method includes transmitting, at a base station, information of one or more CSI-RS configurations to a mobile station, wherein the one or more CSI-RS configurations include one CSI-RS configuration for which the mobile station assumes non-zero transmission power for CSI-RS, transmitting, at the base station, information indicating a CSI-RS configuration for which the mobile station assumes zero transmission power for the CSI-RS among the one or more CSI-RS configurations to the mobile station, mapping, at the base station, CSI-RSs to resource elements of a downlink subframe based on the one or more CSI-RS configurations, and transmitting, at the base station, the downlink subframe mapped with the CSI-RSs to the mobile station. | 11-15-2012 |
20130051275 | METHOD AND APPARATUS FOR TRANSMITTING CHANNEL STATUS INFORMATION IN MULTI-CARRIER WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more particularly, to a method and apparatus for transmitting channel status information (CSI) in a wireless communication system which supports multiple carriers. According to one embodiment of the present invention, a method for transmitting channel status information for multiple carriers comprises the steps of: measuring downlink channels for first and second carriers which are closely placed to each other on the frequency domain; determining channel status information for the first carrier on the basis of a result of the channel measurement for the first carrier; determining channel status information for the second carrier on the basis of a part of the channel status information for the first carrier and a result of the channel measurement for the second carrier; and transmitting channel status information for the first and second carriers. | 02-28-2013 |
20130058307 | METHOD AND DEVICE FOR TRANSMITTING/RECEIVING CHANNEL STATE INFORMATION IN COORDINATED MULTIPOINT COMMUNICATION SYSTEM - The present invention relates to a wireless communication system. More particularly, disclosed are a method and a device for transmitting channel state information in a coordinated multipoint communication system. The method for transmitting channel state information from a terminal to multiple base stations, according to one embodiment of the present invention, comprise the steps of: transmitting the CSI including long-term broadband PMI and short-term sub-band PMI to a first base station; transmitting the CSI including the long-term broadband PMI and not including the short-term sub-band PMI to a second base station; and transmitting the CSI including the short-term sub-band PMI to the second base station, when a request for the short-term sub-band PMI transmission to the second base station is received. | 03-07-2013 |
20130094479 | METHODS FOR TRANSMITTING AND RECEIVING CHANNEL STATE INFORMATION (CSI) AND APPARATUSES THEREOF - A method for transmitting, by a user equipment (UE), a channel state information (CSI) in a wireless communication system is disclosed. The method includes receiving control information about a transmission of the CSI from a serving eNodeB, allocating a CSI combination composed of different CSIs to one subframe based on the received control information, and transmitting the CSI combination to the serving eNodeB in the allocated subframe, wherein the control information includes information on a maximum payload size of a CSI being able to be transmitted in one subframe, a transmission period and a transmission start time point of the CSI combination, and a transmission period and a transmission start time point of each of the different CSIs. | 04-18-2013 |
20130107920 | METHOD AND DEVICE FOR TRANSMITTING/RECEIVING A SIGNAL BY USING A CODE BOOK IN A WIRELESS COMMUNICATION SYSTEM | 05-02-2013 |
20130129014 | Method and Device for Sending and Receiving Precoded Signals on a Wireless Communication System - The present invention relates to a method for transmitting a precoded signal, the method comprising: determining a precoding matrix on the basis of the first matrix, which is determined from a first codebook including precoding matrices indicated by a first precoding matrix index (PMI), and the second matrix, which is determined from a second codebook including precoding matrices indicated by a second PMI; and transmitting the precoded signal using the determined precoding matrix to the receiver, wherein each precoding matrix contained in the first codebook is comprised of a block diagonal matrix, and individual blocks of the block diagonal matrix are configured independently of each other, and each precoding matrix contained in the second codebook is comprised of an upper element and a lower element, where the lower element includes a phase rotation value. | 05-23-2013 |
20130163461 | METHOD AND DEVICE FOR TRANSMITTING/RECEIVING CHANNEL STATE INFORMATION IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more particularly, to a method and device for transmitting/receiving channel state information (CSI). A method for a terminal for transmitting CSI according to one embodiment of the present invention includes: a first step of receiving a reference signal for channel measurement from a base station; a second step of generating sub-band (SB) CSI for each of a plurality of SBs using the received reference signal in the terminal and sequentially transmitting the generated SB CSI to a base station; and a third step of sequentially transmitting each SB CSI to a base station according to an order different from that of the sequential transmission. | 06-27-2013 |
20130242921 | METHOD AND DEVICE FOR FEEDING BACK PRECODING MATRIX INDICATOR USING INTERPOLATION - The present invention relates to a method and a device for feeding back a channel through precoding matrix indicator (PMI) interpolation. As one embodiment of the present invention, a method for feeding back a precoding matrix indicator (PMI) in a CoMP environment comprises the steps of: allowing a terminal to perform PMI interpolation by using PMIs that are included in the PMI window; allowing the terminal to select an optimum PMI by comparing the interpolated PMIs with a channel state of a current channel; and allowing the terminal to feed back the optimum PMI to a base station. | 09-19-2013 |
20130272158 | METHOD OF CONTROLLING UPLINK TRANSMISSION POWER AT UE IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREOF - A method of determining uplink transmission power at a user equipment (UE) in a wireless communication system is disclosed. The method includes receiving channel status information-reference signal (CSI-RS) settings and downlink transmission power values for a plurality of transmission points (TPs) from a higher layer, receiving CSI-RSs from the plurality of TPs, estimating path loss values corresponding to the plurality of TPs based on the received CSI-RSs, determining the uplink transmission power using the estimated path loss values, and transmitting an uplink signal to one or more of the plurality of TPs based upon the determined uplink transmission power. | 10-17-2013 |
20130315184 | METHOD FOR TRANSMITTING/RECEIVING CONTROL CHANNEL IN MULTICELL COOPERATIVE WIRELESS COMMUNICATION SYSTEM AND DEVICE THEREFOR - Disclosed is a method for a terminal to receive a control channel in a wireless communication system. More particularly, the present invention comprises the steps of: receiving a common control channel from a base station; determining an effective channel between the base station and the terminal according to a flag bit of the terminal being indicated in the common control channel; and receiving a terminal specific control channel from the base station on the basis of the effective channel, wherein the terminal specific control channel is space-multiplexes with terminal specific control channels of other terminals controlled by the base station. | 11-28-2013 |
20130315186 | METHOD FOR TRANSMITTING CONTROL CHANNEL IN MULTICELL COOPERATIVE WIRELESS COMMUNICATION SYSTEM AND DEVICE THEREFOR - Disclosed is a method for transmitting a control channel in a multicell cooperative wireless communication system. More particularly, the present invention comprises the steps of: a 1 | 11-28-2013 |
20130315189 | METHOD AND APPARATUS FOR TRANSMITTING CHANNEL STATUS INFORMATION IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more specifically to a method and an apparatus for transmitting channel status information. According to the present invention, a method for enabling a terminal to transmit channel status information (CSI) with respect to cooperative transmission in the wireless communication system, includes the steps of: determining a first precoding matrix indicator (PMI) for a first cell and a second PMI for a second cell; and transmitting the CSI including the first PMI and the second PMI, wherein the CSI is determined on the basis of a coupled precoding matrix in which the first precoding matrix corresponding to the first PMI is coupled with the second precoding matrix corresponding to the second PMI, and the coupled precoding matrix can be determined by a first coupling type or a second coupling type. | 11-28-2013 |
20140126512 | METHOD AND APPARATUS FOR TRANSCEIVING A DOWNLINK HARQ IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more particularly, to a method and apparatus for transceiving a downlink hybrid automatic repeat (HARQ). According to one embodiment of the present invention, a method for setting an HARQ process by a terminal in a wireless communication system may comprise the steps of: receiving, from a base station, limited-resource information indicating a resource the use of which for downlink transmission to the terminal is limited; determining an HARQ process to be activated on the basis of the limited-source information; and performing an HARQ operation for the downlink transmission by means of the HARQ process to be activated. | 05-08-2014 |
20140133336 | CHANNEL STATE INFORMATION TRANSMITTING METHOD AND USER EQUIPMENT, AND CHANNEL STATE INFORMATION RECEIVING METHOD AND BASE STATION - One embodiment of the present invention discloses a method for allowing user equipment (UE), which can receive channel state information reference signals from a plurality of antenna ports, to transmit channel state information to at least one base station that controls the plurality of antenna ports. The method comprises the following steps: receiving power information of each of the plurality of antenna ports from the at least one base station; calculating channel state information on the at least one base station on the basis of the received power information and channel state information reference signals received from the plurality of antenna ports; and transmitting the calculated channel state information to the at least one base station. | 05-15-2014 |
20140140273 | METHOD AND APPARATUS FOR TRANSCEIVING AN UPLINK HARQ IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more particularly, to a method and apparatus for transceiving an uplink hybrid automatic repeat request (HARQ). According to one embodiment of the present invention, a method for performing a HARQ operation in a terminal of a wireless communication system comprises the steps of: receiving, in a subframe n, an uplink grant message for first uplink data from a base station; determining a first HARQ process from among a plurality of HARQ processes associated with the subframe n; and transmitting, in a subframe n+k, the first uplink data to the base station through the first HARQ process. | 05-22-2014 |
20140241454 | METHOD AND APPARATUS FOR TRANSRECEIVING CHANNEL STATE INFORMATION IN COOPERATIVE MULTIPOINT COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more specifically, disclosed are a method and an apparatus for transmitting channel state information in a cooperative multipoint communication system. A method for a terminal transmitting the channel state information (CSI) with respect to multiple base stations in a wireless communication system, according to one embodiment of the present invention, comprises the steps of: receiving information on a periodic report setting of CSI including a rank indicator (RI) with respect to a first base station and a first type of precoding matrix indicator (PMI), and information on a periodic report setting of CSI including an RI with respect to a second base station and the first type of precoding matrix; and a step of transmitting the CSI to the first base station and the second base station on the basis of CSI report setting with respect to the first base station and the second base station, wherein a report on one of the first type of PMI with respect to the first base station, the first type of PMI with respect to the second base station, and the RI with respect to the second base station is omitted, and additional CIS can be transmitted when the report is omitted. | 08-28-2014 |
20140247749 | METHOD AND APPARATUS FOR FEEDING BACK AGGREGATED CHANNEL STATE INFORMATION IN COOPERATIVE MULTIPOINT COMMUNICATION SYSTEM - The present invention relates to a wireless communication system and, in particular, to a method and apparatus for feeding back aggregated CSI using multiple CSI-RS setting information in a wireless communication system which supports CoMP. The method of a terminal feeding back aggregated CSI for cooperative transmission in the wireless communication system according to an embodiment of the present invention, includes the steps of respectively receiving first CSI-RS setting information and second CSI setting information for a first base station and a second base station participating in the cooperative transmission; receiving a first CSI-RS and a second CSI-RS setting information; calculating first CSI and second CSI using the first CSI-RS and the second CSI-RS; and transmitting the aggregated CSI calculated on the basis of the first CSI and the second CSI, wherein the first CSI-RS and the second CSI-RS can be transmitted on the same subframe. | 09-04-2014 |
20140254708 | METHOD FOR REPORTING CHANNEL STATE INFORMATION ON A COORDINATED MULTI-POINT TRANSMISSION AND RECEPTION AGGREGATION, AND APPARATUS THEREFOR - According to one embodiment of the present invention, a method is disclosed in which user equipment (UE) that communicates with a coordinated multi-point transmission and reception (CoMP) aggregation transmits channel state information (CSI) on said CoMP aggregation in a wireless communication system. The method may enable the determination of the number of bits for inter-point phase information for points that belong to said CoMP aggregation, and the number of bits for a channel quality indicator (CQI) for said CoMP aggregation based on rank indicator (RI) information within the number of bits allocated for transmission of the channel state information, and may enable the transmission of the channel state information including the inter-point phase information and CQI on the CoMP aggregation to at least one of a plurality of points that belong to the CoMP aggregation in accordance with said determined number of bits. | 09-11-2014 |
20140314041 | CHANNEL ESTIMATION METHOD AND APPARATUS USING REFERENCE SIGNAL - The present invention relates to a wireless communication system, and more specifically, to a method and an apparatus for estimating a channel using a reference signal. According to one embodiment of the present invention, a method in which a terminal estimates a channel in a wireless communication system may comprise the steps of: receiving a cell-specific reference signal (CRS) and a channel state information-reference signal (CSI-RS) from a base station; generating CSI of a channel estimated using the CRS on the basis of a channel estimated using the CSI-RS and a mapping relationship between the CRS port and the CSI-RS port; reporting the generated CSI to the base station; and demodulating data on the basis of the channel estimated using the CRS. | 10-23-2014 |
20140321359 | METHOD FOR TRANSMITTING CONTROL INFORMATION AND DEVICE THEREFOR - The present invention relates to a wireless communication system. More specifically, the present invention relates to a method and a device for reporting channel state information, wherein the method comprises the steps of: receiving configuration information for a period report of CSI from a first transmission point; and transmitting, to said first transmission point, a CSI report for the downlink of a transmission point corresponding to a corresponding subframe among a plurality of transmission points through each subframe that is periodically set according to said configuration information, wherein: one or more subframes corresponding to a second transmission point are used to transmit a CSI report for multi-transmission point cooperative transmission, if rank information reported to said first transmission point prior to said CSI report is a critical value or less; and one or more subframes corresponding to said second transmission point are used to transmit a CSI report for single-transmission point transmission, if the rank information reported to said first transmission point prior to said CSI report is said critical value or more. | 10-30-2014 |
20140348075 | METHOD AND DEVICE FOR TRANSMITTING CHANNEL STATE INFORMATION IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system. A method for a terminal to transmit channel state information (CSI) comprises the steps of: determining a precoding matrix by selecting a first precoding matrix and a second precoding matrix; and transmitting the CSI including an index of the said first precoding matrix and an index of the said second precoding matrix. The said first precoding matrix relates to a method for transmitting CSI in which a revision factor according to a relationship between the said terminal and a transmission point is applied. | 11-27-2014 |
20140362720 | METHOD AND APPARATUS FOR TRANSMITTING MEASUREMENT REPORT IN A WIRELESS COMMUNICATION SYSTEM - A method and apparatus for transmitting a measurement report in a wireless communication system are disclosed. The method for transmitting a measurement report at a UE in the wireless communication system includes measuring received strengths and reception frequencies of first and second signals, and transmitting a measurement report including a frequency offset between the first and second signals, if the received strength of the second signal is equal to or larger than a predetermined threshold. The frequency offset is used to support cooperative transmission of transmission points transmitting the first and second signals. | 12-11-2014 |
20150016292 | METHOD FOR MEASURING INTENSITY OF INTERFERENCE SIGNAL BASED ON CSI-RS IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS FOR SAME - Disclosed is a method for measuring the intensity of an interference signal by a terminal in a wireless communication system. More particularly, a method for measuring the intensity of an interference signal from a first base station by a terminal in a coordinated multipoint (CoMP) environment comprises: a step of receiving a plurality of channel status information-reference signals (CSI-RSs) from a second base station; a step of receiving downlink signals output from a plurality of resource element (RE) pairs corresponding to the respective plurality of CSI-RSs from the first base station; and a step of measuring a plurality of interference intensities based on the plurality of CSI-RSs and the received downlink signals. | 01-15-2015 |
20150017927 | METHOD FOR MEASURING INTERFERENCE STRENGTH IN WIRELESS COMMUNICATION SYSTEM AND DEVICE THEREFOR - The present invention relates to a wireless communication system and, more particularly, to a method for enabling a terminal to measure the strength of an interference signal in a wireless communication system and a device therefor, wherein the method comprises the steps of: measuring a first interference strength, which is the strength of an interference signal received from a first base station group; calculating a second interference strength, which is the strength of an interference signal received from a second base station group; and correcting the first interference strength on the basis of the second interference strength. | 01-15-2015 |
20150023280 | METHOD FOR FEEDING BACK CHANNEL STATE INFORMATION IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREFOR - The present invention relates to a method for receiving a reference CSI configuration information and a following CSI configuration information which is configured to report a same RI (Rank Indicator) as the reference CSI configuration information, receiving a first CSI-RS (Channel State Information-Resource Signal) configuration information associated with the reference CSI configuration and a second CSI-RS configuration information associated with the following CSI configuration, number of CSI-RS antenna ports according to the second CSI-RS configuration information is same as number of CSI-RS antenna ports according to the first CSI-RS configuration information; and transmitting CSI determined based on at least one of the first CSI-RS configuration information and the second CSI-RS configuration information. | 01-22-2015 |
20150049625 | METHOD AND APPARATUS FOR REPORTING CHANNEL STATE INFORMATION IN WIRELESS COMMUNICATION SYSTEM - One embodiment of the present invention is a method for reporting channel state information by means of a terminal in a wireless communication system, the method comprising: a step of measuring a channel using at least one channel state information-reference signal (CSI-RS) indicated by at least one feedback type index from among a plurality of feedback type indices; and a step of generating channel state information based on the channel measurement and reporting the channel state information. Each of the plurality of feedback type indices indicates one or more CSI-RS configurations to be used in channel estimation and an effective channel relating to said one or more CSI-RS configurations. | 02-19-2015 |
20150055555 | METHOD FOR ESTIMATING CHANNEL STATE IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREFOR - The present invention relates to a wireless communication system. More specifically, the present invention relates to a method for reporting a channel state by a terminal to a serving base station in a wireless communication system, wherein extra channel state information is reported to enable the serving base station to estimate the channel state more accurately. When the base station estimates the channel state with the terminal, the channel state information received from the terminal, the extra channel state information, and traffic information of neighboring base stations are collectively considered to estimate the channel state with the terminal, thereby enabling estimation of the channel state with improved reliability and accuracy. | 02-26-2015 |
20150055723 | METHOD FOR FEEDING BACK CHANNEL STATE INFORMATION IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREFOR - The present invention relates to a method for receiving a reference CSI configuration information and a following CSI configuration information which is configured to report a same RI (Rank Indicator) as the reference CSI configuration information, receiving a first precoding codebook subset information for the reference CSI configuration information and a second precoding codebook subset information for the following CSI configuration information, set of RIs according to the second precoding codebook subset information is same as set of RIs according to the first precoding codebook subset information, and transmitting CSI determined based on at least one of the first precoding codebook subset information and the second precoding codebook subset information. | 02-26-2015 |
20150063177 | METHOD AND DEVICE FOR TRANSMITTING CHANNEL STATE INFORMATION IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system. A method for transmitting channel state information (CSI) by a user equipment in a wireless communication system includes receiving a CSI-reference signal (CSI-RS), determining overhead of a common reference signal (CRS) resource element based on the same antenna port number as an antenna port number associated with the CSI-RS, and transmitting the CSI calculated based on the CSI-RS and the overhead of the CRS resource element. | 03-05-2015 |
20150078271 | METHOD AND APPARATUS FOR ESTIMATING CHANNEL IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system. A method for estimating a channel by a user equipment (UE) in a wireless communication system includes receiving information about at least one channel station information (CSI) configuration for reporting CSI of one of a plurality of serving cells, determining that the same precoding matrix is applied to a plurality of resource blocks when all of the at least one CSI configuration is configured to report a precoding matrix indicator (PMI) and a rank indicator (RI), and determining that the precoding matrix is applied to one resource block when CSI configuration configured not to report the PMI and the RI is present among the at least one CSI configuration, and estimating a channel based on a result of the determination. | 03-19-2015 |
20150078272 | METHOD AND APPARATUS FOR RECEIVING DATA IN WIRELESS COMMUNICATION SYSTEM SUPPORTING COOPERATIVE TRANSMISSION - The present invention relates to a wireless communication system. A method for receiving data by a user equipment (UE) in a cooperative multi-point (CoMP) wireless communication system includes receiving information indicating a transmission base station (BS) that actually transmits data among a plurality of BSs that participate in CoMP, receiving information about zero-power channel state information-reference signal (CSI-RS) of each of the plural BSs, and assuming that data is not mapped to a resource element of zero-power CSI-RS corresponding to the transmission BS and receiving the data through a physical downlink control channel (PDSCH). | 03-19-2015 |
Patent application number | Description | Published |
20090322661 | DISPLAY APPARATUS - A display apparatus includes a plurality of frame rate controllers that generate a motion interpolated intermediate image. The frame rate controllers exchange image information with adjacent frame rate controllers. According to the display apparatus, each frame rate controller displays the intermediate image on a corresponding display area based on the image information provided from the adjacent frame rate controller. | 12-31-2009 |
20100039416 | METHOD OF DRIVING DISPLAY APPARATUS AND DRIVING CIRCUIT FOR DISPLAY APPARATUS USING THE SAME - In a driving method of a display apparatus using a driving circuit, when an image signal is a film image signal, first, second, and third original image signals are extracted based on the film image signal. Then, a first compensation image signal is generated based on first and second original image signals, and a second compensation image signal is generated based on second and third original image signals. The first original image signal, the first compensation image signal, the second original image signal, and the second compensation image signal are sequentially output to have a driving frequency higher than an input frequency. In addition, the first original image signal, the first compensation image signal, the second original image signal, and the second compensation image signal are output i, k, j, and k times, respectively. Thus, a trembling phenomenon perceived by a viewer of a film image may be prevented. | 02-18-2010 |
20110175865 | DISPLAY APPARATUS - A display apparatus includes a plurality of frame rate controllers that generate a motion interpolated intermediate image. The frame rate controllers exchange image information with adjacent frame rate controllers. According to the display apparatus, each frame rate controller displays the intermediate image on a corresponding display area based on the image information provided from the adjacent frame rate controller. | 07-21-2011 |
20110279466 | METHOD OF COMPENSATING IMAGE DATA AND DISPLAY APPARATUS FOR PERFORMING THE SAME - A method of compensating image data, the method includes generating a compensation data of an image data in accordance with a temperature value by using a compensation data of a previous frame and a compensation data generated through a look-up table which is mapped with corresponding to a compensation data of a previous frame and a set temperature value which is smaller than and closest to the temperature value or which is greater than and closest to the temperature value among set temperature values. | 11-17-2011 |
20120127160 | Three Dimensional Image Display Device and Method of Driving the Same - A three dimensional image display device includes a display device that includes a first region and a second region which are adjacent to each other. The display device alternately displays a left eye image and a right eye image, and displays an image having a predetermined gray in a period between the left eye image and the right eye image. In a current frame, a white data voltage is applied to the first region and a corrected white data voltage is simultaneously applied to the second region. The corrected white data voltage may be smaller than the white data voltage. A black data voltage is applied to the first region, a corrected black data voltage is simultaneously applied to the second region, and the corrected black data voltage may be smaller than the black data voltage. | 05-24-2012 |
20120127162 | METHOD FOR DISPLAYING A STEREOSCOPIC IMAGE AND DISPLAY APPARATUS FOR PERFORMING THE SAME - A method for displaying a stereoscopic image, the method comprises generating k images for a left eye and k images for a right eye based on a left-eye image and a right-eye image, where ‘k’ is a natural number greater than two, correcting an image currently received using an n-th image of the k images for the left eye and the k images for the right eye that are previously received, where ‘n’ is a natural number greater than ‘k’, displaying corrected k images for the left eye and corrected k images for the right eye on a display panel, and providing the display panel with lights based on the image displayed on the display panel. | 05-24-2012 |
20120147162 | METHOD OF DISPLAYING STEREOSCOPIC IMAGE AND DISPLAY APPARATUS FOR PERFORMING THE SAME - A method of displaying a stereoscopic image provides first light having a first wavelength and second light having a second wavelength different from the first wavelength to the a display panel according to left-eye and right-eye images displayed on the display panel. Color correcting data are generated by correcting at least one of left-eye color data corresponding to the left-eye image and right-eye color data corresponding to the right-eye image such that a first color coordinate according to the first light and a second color coordinate according to the second light coincide with each other with respect to the same color. The left-eye and right-eye images are displayed using light having wavelengths different from each other, so that a display quality of the stereoscopic image may be enhanced. | 06-14-2012 |
20120169780 | METHOD OF COMPENSATING DATA, DATA COMPENSATING APPARATUS FOR PERFORMING THE METHOD AND DISPLAY APPARATUS HAVING THE COMPENSATING APPARATUS - A method of compensating data includes extending a number of bits of data and outputting extended data of a first color, compensating a luminance of the extended data of the first color based on a position of the extended data of the first color in a display panel and outputting compensated data of the first color, and outputting compensated data of a second color and compensated data of a third color based on the compensated data of the first color. | 07-05-2012 |
20120249525 | DISPLAY SYSTEM - A display system includes a display panel, a panel driving part, an image processing part, a timing control part and a light source part. The display panel displays an image. The image processing part includes a synchronization part that synchronizes a plurality of image signals respectively corresponding to a plurality of contents with each other, a scaling part that respectively scales the image signals into a plurality of image frames having a resolution of the display panel and that sequentially outputs the image frames, and an additional generating part that outputs the image frames respectively corresponding to each of the image frames received from the scaling part. The timing control part provides the image frames respectively corresponding to the contents to the panel driving part. The light source part generates a light and provides the light to the display panel. | 10-04-2012 |
20120320056 | THREE DIMENSIONAL IMAGE DISPLAY DEVICE AND METHOD OF DRIVING THE SAME - A three dimensional image display device includes a display panel and a backlight unit. The display panel displays a left eye image and a right eye image of an image inputted to the display panel, in sequence. The backlight unit includes a plurality of backlight blocks. In the three dimensional image display device, based on at least one of depth information from the objects of the left eye and right eye images, and edge information from the object the left eye image or the right eye image, brightness of the plurality of backlight blocks are independently controlled. | 12-20-2012 |
20130082999 | METHOD OF DRIVING A DISPLAY PANEL AND DISPLAY APPARATUS FOR PERFORMING THE SAME - A method of driving a display panel includes outputting a data voltage of three-dimensional (“3D”) image data included in a left-eye data frame and a right-eye data frame to the display panel along a scanning direction of a first direction during a first period, blocking the data voltage from being provided to the display panel during a second period and outputting a black data voltage to the display panel during a third period that is less than the first period. | 04-04-2013 |
20130147863 | METHOD OF DISPLAYING THREE-DIMENSIONAL STEREOSCOPIC IMAGE AND DISPLAY APPARATUS FOR PERFORMING THE SAME - A method of displaying a three-dimensional stereoscopic image includes providing a display panel with a data signal including a left-eye data signal and a right-eye data signal, sequentially providing each of a plurality of segment blocks of an active polarized panel with a driving signal including a high level and a low level, where the active polarized panel emits first polarized light in a first polarizing mode of the driving signal based on the data signal, and the active polarized panel emits second polarized light in a second polarizing mode of the driving signal based on the data signal, and selectively providing the display panel with light based on a level changing interval, during which a level of the driving signal is changed. | 06-13-2013 |
20130241922 | METHOD OF DISPLAYING THREE DIMENSIONAL STEREOSCOPIC IMAGE AND DISPLAY APPARATUS PERFORMING FOR THE METHOD - A method of displaying a three-dimensional (“3D”) image includes displaying a left-eye image and a right-eye image on a display panel, the display panel including a first sub pixel, a second sub pixel, a third sub pixel and a fourth sub pixel sequentially arranged in a row direction and driving an active barrier panel to form an opening part configured to transmit light and a barrier configured to block light, the active barrier panel including a first barrier electrode, a second barrier electrode, a third barrier electrode and a fourth barrier electrode respectively corresponding to the first, second, third and fourth sub pixels. | 09-19-2013 |
20130271441 | METHOD OF DRIVING A DISPLAY DEVICE - A method of driving a display device includes a preliminary frame charging step and a main frame charging step. The method comprises a preliminary frame charging step of simultaneously charging liquid crystal cells in a pixel line group having a selected pixel row and a unselected pixel row with pixel data of the selected pixel row of the pixel line group and a main frame charging step of charging liquid crystal cells in the unselected pixel line group with pixel data of the unselected pixel line group. | 10-17-2013 |
20130335385 | 3-DIMENSIONAL IMAGE DISPLAY DEVICE AND DRIVING METHOD THEREOF - A 3-dimensional image display device and a driving method thereof, the method including using a first array of a matrix of unit pixels to form an image while a remaining array of the unit pixels displays black, and forming openings in a barrier panel to expose the unit pixels of the first array, the width of the openings ranging from 1.5 to 2 times the width of the exposed unit pixels. | 12-19-2013 |
20140022219 | DISPLAY DEVICE AND METHOD FOR OPERATING THE DISPLAY DEVICE - A display device includes a display panel configured to receive a first-frame image signal for displaying a first-frame image in a first frame. The display panel is further configured to receive a second-frame image signal for displaying a second-frame image in a second frame that immediately follows the first frame such that the display panel appears to display a transition region associated with a boudary between a portion of the first-frame image and a portion of the second-frame image and moving in a moving direction. The display device further includes an optical effect layer and electrode sets. The electrode sets respectively overlap different portions of the optical effect layer and are configured for sequentially starting affecting the different portions of the optical effect layer such that the optical effect layer appears to display a light-blocking section that moves in the moving direction and overlaps the transition region. | 01-23-2014 |
20140063379 | LIQUID CRYSTAL LENS PANEL, THREE DIMENSIONAL PANEL ASSEMBLY, AND DISPLAY APPARATUS HAVING THE SAME - A liquid crystal lens panel includes a first substrate, a second substrate, and a liquid crystal layer. The first substrate includes a first base substrate, a lens common electrode disposed on the first base substrate, and a first alignment layer disposed on the lens common electrode, the first alignment layer including a first alignment direction. The second substrate includes a second base substrate opposite to the first base substrate, a plurality of lens electrodes that extend in a lens axis and is parallel with each other, and a second alignment layer disposed on the plurality of lens electrodes, the second alignment layer including a second alignment direction substantially perpendicular to the first alignment direction. The liquid crystal layer is disposed between the first and second alignment layers. | 03-06-2014 |
20140104265 | METHOD OF COMPENSATING IMAGE DATA AND DISPLAY APPARATUS FOR PERFORMING THE SAME - A method of compensating image data, the method includes generating a compensation data of an image data in accordance with a temperature value by using a compensation data of a previous frame and a compensation data generated through a look-up table which is mapped with corresponding to a compensation data of a previous frame and a set temperature value which is smaller than and closest to the temperature value or which is greater than and closest to the temperature value among set temperature values. | 04-17-2014 |
20140118332 | METHOD OF DRIVING ACTIVE BARRIER PANEL AND DISPLAY APPARATUS FOR PERFORMING THE METHOD - A method of driving an active barrier panel, the active barrier panel comprising an electrode unit which has n barrier electrodes operating as an opening part transmitting light and n barrier electrodes operating as a barrier part blocking the light, the method includes calculating a crosstalk distribution of each of observer's left-eye and right-eye corresponding to each of 2n barrier-shift modes, according to an observer's position, dividing an active area of the active barrier panel into at least one barrier block based on a flat portion of the crosstalk distribution, in which a minimum crosstalk is maintained, determining the barrier-shift mode for each barrier block to maintain the minimum crosstalk, and operating the electrode unit in a corresponding barrier block in the determined barrier-shift mode. | 05-01-2014 |
20140168281 | METHOD OF DRIVING DISPLAY PANEL AND LIQUID CRYSTAL DISPLAY APPARATUS FOR PERFORMING THE SAME - A method of driving a liquid crystal display panel including a liquid crystal cell connected to a data line and a gate line includes: outputting a data signal to the data line; outputting a plurality of gate clock signals; and outputting a gate signal to the gate line based on the gate clock signals. Here, an interval between rising edges of the gate signals adjacent to each other is increased as a distance between the liquid crystal cell receiving the gate signal and a data driving part outputting the data signal increases. | 06-19-2014 |
20140253528 | METHOD OF DRIVING DISPLAY APPARATUS AND DRIVING CIRCUIT FOR DISPLAY APPARATUS USING THE SAME - In a driving method of a display apparatus using a driving circuit, when an image signal is a film image signal, first, second, and third original image signals are extracted based on the film image signal. Then, a first compensation image signal is generated based on first and second original image signals, and a second compensation image signal is generated based on second and third original image signals. The first original image signal, the first compensation image signal, the second original image signal, and the second compensation image signal are sequentially output to have a driving frequency higher than an input frequency. In addition, the first original image signal, the first compensation image signal, the second original image signal, and the second compensation image signal are output i, k, j, and k times, respectively. Thus, a trembling phenomenon perceived by a viewer of a film image may be prevented. | 09-11-2014 |
20140354613 | DISPLAY DEVICE AND METHOD FOR OPERATING THE DISPLAY DEVICE - A display device includes a display panel configured to receive a first-frame image signal for displaying a first-frame image in a first frame. The display panel is further configured to receive a second-frame image signal for displaying a second-frame image in a second frame that immediately follows the first frame such that the display panel appears to display a transition region associated with a boudary between a portion of the first-frame image and a portion of the second-frame image and moving in a moving direction. The display device further includes an optical effect layer and electrode sets. The electrode sets respectively overlap different portions of the optical effect layer and are configured for sequentially starting affecting the different portions of the optical effect layer such that the optical effect layer appears to display a light-blocking section that moves in the moving direction and overlaps the transition region. | 12-04-2014 |
20150022512 | DISPLAY DEVICE AND DRIVING METHOD THEREOF - A display device and a driving method thereof are disclosed. In one aspect, the display device includes a display panel including a plurality of pixel rows, a data driver configured to transfer data voltages to the display panel, a gate driver configured to transfer gate signals to the display panel, and a signal controller configured to control the data driver and the gate driver. The pixel rows are divided into i (i is a natural number of 2 or more) pixel row groups including a plurality of pixel rows, respectively. The display panel displays one still image for one frame set including the i sequential frames, and each of the i pixel row groups is charged by receiving the data voltage for each frame of the frame set, and the frames in which the i pixel row groups are charged are different from each other. | 01-22-2015 |
Patent application number | Description | Published |
20100202373 | Method and apparatus of transmitting uplink control signal in wireless communication system - A method and apparatus of transmitting an uplink control signal in a wireless communication system is provided. A user equipment receives pieces of resource allocation information about a plurality of respective uplink control channels, and transmits the uplink control signal through one of the plurality of uplink control channels. Radio resources sequentially adjacent to each other on a basis of one reference uplink control channel, selected from the plurality of uplink control channels, are allocated to the respective uplink control channels. And the resource allocation information comprises size of the radio resources allocated to each of the plurality of uplink control channels within a resource region in which the plurality of uplink control channels is configured. | 08-12-2010 |
20100208669 | Method and apparatus of composing uplink control channel in wireless communication system - A method and apparatus of composing an uplink control channel in a wireless communication system is provided. Uplink radio resources including a plurality of symbols and a plurality of subcarriers is divided into a plurality of Feedback Mini-Tiles (FMTs) each having two consecutive subcarriers. Reordering FMTs (RFMTs) is selected from the plurality of FMTs. And a feedback channel is composed using the plurality of consecutive RFMTs. | 08-19-2010 |
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 |
20120076024 | 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. | 03-29-2012 |
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 |
20120327804 | METHOD AND APPARATUS FOR CONTROLLING UPLINK TRANSMISSION POWER - The present description relates to a method for controlling uplink power in a distributed multi-node system, comprising the following steps: receiving reference signals from a plurality of antenna nodes containing at least one antenna; estimating average propagation loss on the basis of the receiving power of the reference signals received from the plurality of antenna nodes; receiving, via a downlink control channel, noise and interference (NI) information from a base station which contains the plurality of antenna nodes; and determining uplink transmission power using the estimated average propagation loss and the received noise and interference information. | 12-27-2012 |
20130029591 | METHOD FOR COOPERATIVE DATA TRANSMISSION AMONG TERMINALS, AND METHOD FOR LUSTERING COOPERATIVE TERMINALS FOR SAME - The present description relates to a method in which a base station clusters cooperative terminals so as to enable cooperative data transmission among terminals. The clustering method comprises the following steps: identifying terminals which can transmit data of an opponent terminal; generating a cooperative cluster containing the identified terminals; transmitting information on the cooperative cluster to the terminals which belongs to the cooperative cluster; and receiving data of a second terminal from a first terminal, which are terminals belonging to the cooperative cluster. | 01-31-2013 |
20130029680 | METHOD IN WHICH A TERMINAL COOPERATES WITH ANOTHER TERMINAL TO TRANSMIT DATA, AND METHOD FOR RECEIVING THE DATA - According to the disclosure of the present description, a method in which a terminal cooperates with another terminal to transmit data to a base station is provided. The method comprises the following steps: if data to be transmitted to a base station exists, mutually exchanging data with another cooperative terminal which belongs to the same cooperative cluster; transmitting, to the base station, a request message for an allocation of an uplink resource for transmitting the data; receiving, from the base station, a permission message for the uplink resource; and, upon receipt of the permission message, transmitting the data and data of said other terminal using the uplink resource in accordance with the permission message. | 01-31-2013 |
20130034136 | METHOD OF COOPERATIVE DATA TRANSMISSION BETWEEN TERMINALS AND A METHOD OF RECEIVING DATA - The present invention relates to a method for reducing power consumption when performing the cooperative transmission in a cooperative transmission system, the method comprising: defining a cooperative transmission participation rate or a cooperative transmission non-participation rate to adjust the participation rate of at least one terminal capable of cooperative transmission within at least one cooperative cluster, the participation rate adjustment being carried out in the at least one terminal capable of cooperative transmission by generating a random value having a preset range; comparing the generated random value with a threshold as a reference indicating whether a corresponding terminal is participating in cooperative transmission; and determining whether the corresponding terminal has participated in cooperative transmission, on the basis of the comparison result. | 02-07-2013 |
20130094384 | METHOD AND APPARATUS FOR PERFORMING CHANNEL MEASUREMENT IN A DISTRIBUTED MULTI-NODE SYSTEM - The present description relates to a method for receiving a reference signal (RS) in a distributed multi-node system, comprising: a step of receiving, from a base station, channel state information reference signal (CSI-RS) configuration information which indicates the configuration of the channel state information reference signal the power of which is nonzero; and a step of receiving a channel state information reference signal for at least one node in a cell on the basis of the channel state information reference signal configuration information, wherein said channel state information reference signal with non-zero power has at least one configuration, and is received via at least one subframe. | 04-18-2013 |
20130115966 | METHOD AND DEVICE FOR TRANSMITTING A FEEDBACK SIGNAL IN A MULTI-NODE SYSTEM - The present invention relates to wireless communication, and particularly, to a method and device for transmitting a feedback signal of a terminal in a multi-node system. The method for a terminal to transmit feedback information in a multi-node system including a plurality of nodes and a base station for controlling same includes: transmitting first information upon the request of resource allocation so as to give notice that there is information to be transmitted to the base station; receiving information from the base station at the request for the transmission of second information necessary for the resource allocation; and transmitting the requested second information to the base station. The feedback information may be transmitted to the base station together with the first information or the second information. | 05-09-2013 |
20130128761 | METHOD AND DEVICE WHEREBY BASE STATION ALLOCATES NODES TO TERMINAL IN A SEMI-STATIC FASHION IN MULTI-NODE SYSTEM - The present invention relates to wireless communication, and more specifically, to a method and device whereby a base station allocates nodes to a terminal in a semi-static fashion in a multi-node system. The method, according to one aspect of the present invention, whereby a base station allocates at least a portion of a plurality of nodes to a terminal in a multi-node system comprising the plurality of nodes and the base station for controlling the plurality of nodes, comprises the steps of: receiving, from the terminal, data showing at least one first node that is preferred among the plurality of nodes by the terminal; and transmitting, to the terminal, first data for allocating the first node(s) to the terminal. The first data may comprise pilot data which is required by the terminal in order to transmit, to the base station, feedback data concerning the first node. | 05-23-2013 |
20130155897 | METHOD OF TRANSMITTING INFORMATION ABOUT A PRE-CODING MATRIX OF A TERMINAL IN A MULTIPLE NODE SYSTEM - A method of transmitting, by a first terminal, information about a pre-coding matrix to a base station in a multiple node system comprises the steps: measuring a downlink channel of a first node through a reference signal for CSI (Channel-State Information) measurement of the first node; measuring a downlink channel of a second node through a reference signal for decoding transmitted by the second node; and transmitting, by the first terminal, information about a pre-coding matrix for the first terminal to the base station on the basis of the measured downlink channels of the first and second nodes. | 06-20-2013 |
20130163484 | APPARATUS AND METHOD FOR TRANSMITTING/RECEIVING SIGNALS BY USING A PRESET FRAME STRUCTURE IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to an apparatus and a method for transmitting/receiving signals by using a preset frame structure in a wireless communication system. As there are difficulties ensuring the link capacity and quality for a high speed moving object with the existing frame structure and the antenna arrangement and communication system based on the existing scheme, a new frame structure needs to be proposed. According to one example of those newly proposed frame structures, one frame is composed of 8 subframes, each of the 8 subframes being composed of orthogonal frequency division multiple access (OFDMA) symbols in a range of 11 to 14, and the cyclic prefix (CP) length of the frame is ⅛ or less of an effective symbol length (e.g., ⅛, 1/16, 1/31, 1/64). | 06-27-2013 |
20130170409 | APPARATUS AND METHOD FOR TRANSCEIVING A SIGNAL USING A PREDETERMINED FRAME STRUCTURE IN A WIRELESS COMMUNICATION SYSTEM - Disclosed are an apparatus and method for transceiving a signal using a frame structure appropriate for a high-speed moving body. The method for transceiving a signal using a predetermined frame structure according to the present invention comprises a step of transceiving a signal via a frame having the predetermined frame structure, wherein one frame is constituted by eight subframes, and said frame consists of a type-1 subframe consisting of six orthogonal frequency division multiple access (OFDMA) symbols and a type-2 subframe consisting of seven OFDMA symbols, and said frame has a cyclic prefix length which is either 0, 1/32 of the useful symbol length, 1/64 of the useful symbol length, or 1/128 of the useful symbol length. | 07-04-2013 |
20130172003 | METHOD OF ALLEVIATING INTERFERENCE BETWEEN CELLS IN A MULTICELL SYSTEM AND DEVICE FOR THE METHOD - The present invention discloses a method of a terminal to reduce interference between cells in a multicell system. In more detail, the method includes: receiving information on at least one adjacent base station from a serving base station; receiving a reference signal from the at least one adjacent base station on the basis of the information on the at least one adjacent base station; measuring interference for each transmitting antenna of the at least one adjacent base station by using the reference signal; and transmitting interference information on the each transmitting antenna to the serving base station. | 07-04-2013 |
20130242877 | METHOD AND APPARATUS FOR NOTIFYING A NODE IN A MULTI-NODE SYSTEM - The present description relates to a method for notifying at least one node being used from among a plurality of nodes in a multi-node system including the plurality of nodes and a base station for controlling the plurality of nodes, wherein the method comprises a step in which a terminal determines, from the table preemptively shared with the base station, an index for indicating at least one node to be notified; and a step in which the terminal performs communication with the base station using the determined index. | 09-19-2013 |
20130308503 | METHOD FOR TRANSMITTING UPLINK CONTROL INFORMATION AND USER EQUIPMENT, AND METHOD FOR RECEIVING UPLINK CONTROL INFORMATION AND BASE STATION - Disclosed are a method and a UE for transmitting uplink control information, and a method and a BS for receiving uplink control information. According to the present invention, a time-frequency resource for the UL transmission, which collides with the DL transmission by the neighbor cell, can be removed or reduced to mitigate inter-cell interference. | 11-21-2013 |
20130308547 | METHOD FOR SENDING AND RECEIVING TERMINAL CAPABILITY CHANGE INFORMATION FOLLOWING TERMINAL CONNECTION TO AN EXTERNAL APPARATUS - The present invention relates to concerns a capability information transmission method in a wireless mobile communication system wherein, when a terminal having a predetermined capability reports the capability of the terminal to a base station, the reporting comprises the steps of: connecting to an external apparatus comprising at least an antenna; and reporting, to the base station, information giving the capability as changed by the connection with the external apparatus. | 11-21-2013 |
20130308590 | CHANNEL STATE INFORMATION TRANSMITTING METHOD AND USER EQUIPMENT, CHANNEL STATE INFORMATION RECEIVING METHOD AND BASE STATION - As channel state information of multiple nodes in a multiple node system, the present invention relates to a method and a device for transmitting and receiving information showing a correlation between said multiple nodes. Also, the present invention relates to a method and a device for transmitting and receiving a Channel Quality Indication (CQI), in consideration of signal through transmitted by multiple nodes. | 11-21-2013 |
20130343220 | METHOD FOR TRANSCEIVING CHANNEL STATE INFORMATION AND TRANSCEIVING DEVICE - The present invention relates to a method, in which a terminal transmits channel state information in a multi-node system, which includes the steps of: receiving information about cooperative transmission candidate nodes from a network; calculating first channel state information about the cooperative transmission candidate nodes; calculating second channel state information by assuming that the nodes included in the interference candidate modes are interference nodes among the cooperative transmission candidate nodes; and transmitting the calculated first and second channel state information to the network. | 12-26-2013 |
20140022961 | UPLINK POWER CONTROL METHOD, USER EQUIPMENT, AND BASE STATION - Provided is a method for mitigating inter-cell interference generated by the collision of UL transmissions and DL transmissions between adjacent cells in an asymmetric time division duplex (TDD) communication system. The present invention removes or reduces time-frequency resources for UL transmissions which collide with DL transmissions of an adjacent cell, and thus can mitigate inter-cell interference. | 01-23-2014 |
20140023033 | METHOD AND APPARATUS FOR TRANSCEIVING CHANNEL STATUS INFORMATION AND TRANSCEIVER - According to the present invention, a method of a terminal to transmit channel status information in a multi distributed node system includes: receiving a request for a channel status information report on a plurality of nodes from a network; calculating channel status information on the plurality of nodes; and transmitting the calculated channel status information to the network. The channel status information includes information on a correlation between the plurality of nodes. The information on the correlation provides a method for transmitting channel status information, which includes an index in a layer combination table representing the degree of correlation between nodes. | 01-23-2014 |
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 |
20140071848 | METHOD FOR REPORTING CHANNEL STATE INFORMATION IN A WIRELESS COMMUNICATION SYSTEM, AND APPARATUS THEREFOR - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and apparatus for reporting channel state information (CSI), wherein the method in which a terminal reports CSI comprises the steps of: receiving configuration information for periodic CSI reporting from a base station; and transmitting CSI information for each of a plurality of sets of CSI reports based on said configuration information to said base station via a physical uplink control channel (PUCCH). Said plurality of sets of CSI reports contains one or more mutually different subframes. | 03-13-2014 |
20140086192 | METHOD FOR RECEIVING DOWNLINK CONTROL CHANNEL BY MEANS OF A TERMINAL IN A WIRELESS CHANNEL SYSTEM AND APPARATUS FOR SAME - The present invention relates to a method for receiving a downlink control channel by means of a terminal in a wireless channel system and an apparatus for same. In particular, the method for receiving a downlink control channel by means of a terminal in a wireless channel system includes the steps of: dividing at least one resource block allocated to the terminal into the preset number of subsets; selecting one or more subsets for the terminal from the at least one resource block; setting the selected subset set as a search space for the terminal; and performing blind decoding for the search space to detect the downlink control channel, wherein the preset number of subsets are respectively demodulated by demodulation reference signals (DM-RS) defined with different antenna ports in each of the resource blocks. | 03-27-2014 |
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 |
20140092811 | METHOD FOR TRANSMITTING CHANNEL STATUS INFORMATION AND USER EQUIPMENT, AND METHOD FOR RECEIVING CHANNEL STATUS INFORMATION AND BASE STATION - Disclosed are a method and an apparatus for transmitting/receiving channel status information on at least one of a plurality of nodes in a multi-node system. According the present invention, a channel status between a UE and a node which transmits data to the UE can be reported more accurately. | 04-03-2014 |
20140094216 | METHOD FOR DETERMINING UPLINK TRANSMISSION POWER AND USER EQUIPMENT - The present invention provides a method and apparatus for determining uplink transmission power, and a method and apparatus for uplink power control. The base station of the present invention provides user equipment (UE) with UE specific weights for downlink path loss for uplink power control when the UE simultaneously transmits signals using a plurality of nodes. The UE then determines uplink transmission power by applying the UE-specific weights to the downlink path loss. | 04-03-2014 |
20140153426 | METHOD AND APPARATUS FOR PERFORMING A CHANNEL MEASUREMENT THROUGH A RECEIVING END IN A WIRELESS COMMUNICATION SYSTEM - Disclosed is a method for receiving a downlink signal through a receiving end in a wireless communication system. Specifically, the method comprises the steps of: receiving, from a transmitting end, information on at least one antenna port of a reference signal for a control channel and at least one antenna port of a reference signal for a data channel; receiving the control channel on the basis of the reference signal for the control channel; and receiving the data channel on the basis of the reference signal for the control channel and the reference signal for the data channel, wherein the at least one antenna port of the reference signal for the control channel is included in the at least one antenna port of the reference signal for the data channel. | 06-05-2014 |
20140153515 | METHOD FOR TRANSMITTING/RECEIVING CONTROL INFORMATION AND APPARATUS FOR TRANSMITTING/RECEIVING - The present invention relates to a method for a terminal receiving control information in a distributed multi-node system, and provides a method for receiving the control information comprising the steps of: receiving from a node information relating to a resource allocation method with regard to an enhanced-physical downlink control channel (E-PDCCH); and receiving from the node the control information through the E-PDCCH, based on the information relating to the resource allocation method which is received. | 06-05-2014 |
20140192755 | METHOD FOR TRANSMITTING CONTROL INFORMATION BY A BASE STATION IN A WIRELESS COMMUNICATION SYSTEM, AND DEVICE THEREFOR - The present application discloses a method for transmitting, by a base station, downlink control information to a terminal in a wireless communication system. More particularly, the method comprises the steps of: allocating, to a transmission resource, the downlink control information for the terminal; and transmitting, to the terminal, the downlink control information using the transmission resource. the downlink control information for the terminal comprises: a downlink grant; and an uplink grant, wherein the downlink grant is allocated to one of first and second slots of a subframe of the transmission resource, and the uplink grant is allocated to at least one of first and second slots of a subframe of the transmission resource. | 07-10-2014 |
20140204922 | METHOD FOR TRANSMITTING UPLINK SIGNALS FROM A USER EQUIPMENT TO A BASE STATION IN A WIRELESS COMMUNICATION SYSTEM AND METHOD FOR THE SAME - A method for transmitting uplink signals from a user equipment to a base station in a time division multiplexing wireless communication system is disclosed. The method comprises the steps of transmitting a first uplink signal on an uplink subframe or a special subframe that precedes the uplink subframe, by preceding a first timing advance value at a reference time; and transmitting a second uplink signal on the uplink subframe by preceding a second timing advance value at the reference time, wherein the first timing advance value is greater than the second timing advance value, and the first uplink signal is transmitted for an uplink pilot time slot (UpPTS) period of the special subframe if a difference value between the first timing advance value and the second timing advance value is greater than a preset value. | 07-24-2014 |
20140233525 | METHOD AND APPARATUS FOR ALLOCATING RESOURCES IN WIRELESS COMMUNICATION SYSTEM - A method for a base station to transmit a Demodulation Reference Signal (DMRS) for a control channel in a wireless communication system is disclosed. The method includes transmitting a DMRS for an Enhanced-Physical Downlink Control Channel (E-PDCCH) to a user equipment, wherein a DMRS sequence corresponding to the transmitted DMRS is formed using an initial sequence calculated based on a virtual cell ID. | 08-21-2014 |
20140286288 | METHOD AND APPARATUS FOR TRANSCEIVING A DOWNLINK CONTROL CHANNEL IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more particularly, to a method and apparatus for transceiving a downlink control channel. According to one embodiment of the present invention, a method in which a base station transmits a downlink control channel to a terminal in a wireless communication system comprises the steps of: transmitting one or more enhanced-physical downlink control channels (E-PDCCHs) within a resource region allocable for an E-PDCCH; and transmitting E-PDCCH allocation resource information for the one or more E-PDCCHs to the terminal. The E-PDCCH allocation resource information indicates the resource in which the one or more E-PDCCHs exist from among the resource region allocable to the E-PDCCH. An effective physical downlink shared channel (PDSCH) allocation resource region for the terminal can be determined on the basis of the E-PDCCH allocation resource information. | 09-25-2014 |
20140293944 | METHOD AND APPARATUS FOR ALLOCATING RESOURCES IN WIRELESS COMMUNICATION SYSTEM - A multiple distributed antenna system is disclosed. A method for a base station to allocate an antenna port to transmit signals in a wireless communication system includes allocating a resource for transmitting an Enhanced-Physical Downlink Control Channel (E-PDCCH) for a user equipment, and transmitting the E-PDCCH to the user equipment using the allocated resource, wherein the E-PDCCH for the user equipment is allocated to a first antenna port, a Physical Downlink Shared Channel (PDSCH) corresponding to the E-PDCCH for the user equipment is allocated to a second port, and the second antenna port to which the PDSCH is allocated is determined according to the first antenna port. | 10-02-2014 |
20140301329 | METHOD AND APPARATUS FOR ALLOCATING RESOURCES IN WIRELESS COMMUNICATION SYSTEM - A multiple distributed system is disclosed. An uplink control resource allocation method for a user equipment to transmit an Acknowledgement/Negative ACK (ACK/NACK) signal includes receiving one or more Enhanced-Physical Downlink Control Channels (E-PDCCHs), receiving one or more Physical Downlink Shared Channels (PDSCHs) corresponding to the one or more E-PDCCHs, and transmitting ACK/NACK signals for reception of the one or more PDSCHs through a Physical Uplink Control Channel (PUCCH), wherein Control Channel Element (CCE) indexes of the PUCCH transmitting the ACK/NACK signals are determined in consideration of first CCE indexes of the one or more E-PDCCHs and the number of CCEs of a PUCCH determined by a higher layer. | 10-09-2014 |
20140328302 | METHOD AND APPARATUS FOR TRANSCEIVING A DOWNLINK CONTROL CHANNEL IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more particularly, to a method and apparatus for transceiving a downlink control channel. According to one embodiment of the present invention, method in which a base station transmits downlink control information in a wireless communication system comprises: a step for determining an allocatable resource region for an enhanced physical downlink control channel (E-PDCCH) of a local allocation system; a step for allocating an E-PDCCH to the determined allocatable resource region for the E-PDCCH; and a step for transmitting the downlink control information on the allocated E-PDCCH. The allocatable resource region for the E-PDCCH can be set as a group of partial resource regions in each of a plurality of partitions when a downlink system bandwidth contains said plurality of partitions. | 11-06-2014 |
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 |
20140369287 | METHOD FOR ESTIMATING DATA CHANNEL IN WIRELESS COMMUNICATION SYSTEM, AND APPARATUS FOR SAME - The present invention relates to a method in which a UE estimates a downlink data channel in a wireless communication system, and an apparatus for the same. Specifically, disclosed is a method in which a UE estimates a downlink data channel in a wireless communication system, the method including the steps of: receiving a downlink control channel using a UE-specific reference signal; bundling a resource block for a downlink data channel into one channel estimation unit when a space resource for the downlink control channel and a space resource for the downlink data channel which makes commands in the downlink control channel are the same as each other; and performing a channel estimation on the basis of the UE-specific reference signal with respect to the one channel estimation unit. | 12-18-2014 |
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 |
20150029963 | METHOD AND DEVICE FOR TRANSMITTING A TERMINAL-SPECIFIC REFERENCE SIGNAL FOR A CONTROL CHANNEL BY A BASE STATION IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method for transmitting a terminal-specific reference signal for a control signal by a base station in a wireless communication system. Specifically, the method is characterized in that it comprises: transmitting a plurality of control channels and a first terminal-specific reference signal for the plurality of control channels to a first resource region; and transmitting one control channel and a second terminal-specific reference signal for the control channel to a second resource region, wherein the different descrambling identifiers are applied to the first and second terminal-specific reference signals. | 01-29-2015 |
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 |
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 |
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 |
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 |
20150085766 | METHOD FOR MULTIPLEXING CONTROL INFORMATION AT BASE STATION IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS FOR THE SAME - A method for transmitting a downlink control channel at a base station in a wireless communication system is disclosed herein. The method includes the steps of generating control information for each of a plurality of user equipments; mapping the control information for each of the plurality of user equipments to one of subcarrier groups within at least one resource block pairs configured for the downlink control channel, wherein the subcarrier groups mapped to the control information for each of the plurality of user equipments are different from each other; and transmitting the downlink control channel through the subcarrier groups. | 03-26-2015 |