METHOD FOR SIGNALING CONTROL INFORMATION FOR COORDINATED MUL Tl POINT TRANSMISSION IN WIRELESS COMMUNICATION SYSTEM

Abstract

Disclosed is a method for signaling control information for coordinated multipoint (CoMP) transmission in a wireless communication system. The control information signaling method for CoMP transmission is performed by a base station and comprises providing, through RRC signaling, a terminal with setup information on each CSI-RS resource of a CoMP measurement group which is set in the terminal; and selectively providing, through DCI, the terminal with control information which indicates mapping of the PDSCH resource element corresponding to terminal and at least either pseudo-same positionality information of CSI-RS or pseudo-same positionality information of DM-RS. Thus, control information signaling for coordinated multipoint transmission can be efficiently performed.

We claim: 
     
         1 . A communication method performed by a user equipment (UE), the method comprising:
 receiving a first message comprising a plurality of sets of parameters, each of the plurality of sets of parameters comprising information on a location of a Channel State Information Reference Signal (CSI-RS);   receiving Downlink Control Information (DCI) on a physical downlink control channel (PDCCH), the DCI designating a first set of parameters among the plurality of sets of parameters;   receiving the CSI-RS based on the first set of parameters; and   receiving data using radio resources on a physical downlink shared channel (PDSCH) based on the first set of parameters,   wherein the DCI, the CSI-RS, and the data are received in one sub-frame.   
     
     
         2 . The method of  claim 1 , wherein the DCI on the PDCCH is related to semi persistent scheduling (SPS) activation. 
     
     
         3 . The method of  claim 1 , wherein the DCI corresponds to a downlink control information (DCI) format 2D. 
     
     
         4 . The method of  claim 1 , wherein the DCI comprises two (2) bits which indicate one of four sets of parameters. 
     
     
         5 . The method of  claim 1 , wherein the plurality of sets of parameters comprise a second set of parameters, the second set of parameters comprises information on another location of another CSI-RS, and the location of the CSI-RS is different from the another location of the another CSI-RS. 
     
     
         6 . The method of  claim 1 , wherein each of the plurality of sets of parameters comprise information on a starting Orthogonal Frequency Division Multiplexing (OFDM) symbol. 
     
     
         7 . A communication method performed by a base station, the method comprising:
 transmitting a first message comprising a plurality of sets of parameters to a user equipment (UE), each of the plurality of sets of parameters comprising information on a location of a Channel State Information Reference Signal (CSI-RS);   transmitting Downlink Control Information (DCI) on a physical downlink control channel (PDCCH) to the UE, the DCI designating a first set of parameters among the plurality of sets of parameters;   transmitting the CSI-RS based on the first set of parameters; and   transmitting data using radio resources on a physical downlink shared channel (PDSCH) to the UE based on the first set of parameters,   wherein the DCI, the CSI-RS, and the data are transmitted in one sub-frame.   
     
     
         8 . The method of  claim 7 , wherein the DCI on the PDCCH is related to semi persistent scheduling (SPS) activation. 
     
     
         9 . The method of  claim 7 , wherein:
 the first set of parameters allows the UE to receive the data, and   the information, in the first set of parameters, on the location of the CSI-RS allows the UE to measure the channel conditions.   
     
     
         10 . The method of  claim 7 , wherein each of the plurality of sets of parameters comprise information on a starting Orthogonal Frequency Division Multiplexing (OFDM) symbol. 
     
     
         11 . The method of  claim 7 , wherein the first message is transmitted using RRC (Radio Resource Control) signaling.