Patent ID: 9288691
Filing Date: 2016-03-15
CPC Classification: H04B,H04L,H04W

Claim Text:
1. A method of reporting channel state information (CSI) by a user equipment in a wireless communication system supporting a Coordinated Multi Point (CoMP) transmission, the method comprising: receiving a reference signal (RS) from a serving cell and at least one cooperative cell; forming the generating the CSI for the CoMP transmission based on the RS; and reporting the CSI to the serving cell on a Physical Uplink Shared Channel (PUSCH), wherein the CSI includes a Channel Quality Indicator (CQI) information and a Precoding Matrix Index (PMI) information, wherein the CQI information includes a wideband CQI and a CQI for each of subband selected for the CoMP transmission, wherein the PMI information includes a wideband PMI and a PMI for each of the selected subband, and wherein the CSI includes information to compensate a relative phase difference and a relative amplitude difference between a downlink signal transmitted from the at least one cooperative cell and a downlink signal transmitted from the serving cell.