Patent ID: 9131405
Filing Date: 2015-09-08
Classification: H04B,H04J,H04L,H04W

Abstract:
1. A method of transmitting channel status information (CSI) at a user equipment (UE) in a wireless communication system, the method comprising: receiving, by the UE, control information including a coordinated multi-point (CoMP) CSI request field, wherein a bit size of the CoMP CSI request field is set to 2 bits, and wherein a serving cell and at least one coordinating cell exist when a CoMP system is applied; determining, by the UE, a CoMP CSI report type for the CSI based on a value of the CoMP CSI request field, wherein the determined CoMP CSI report type is distinguished by CSI report contents with reference to a report target, and wherein the determined CoMP CSI report type comprises a first CoMP CSI report type having content for the serving cell, a second CoMP CSI report type having content for the at least one coordinating cell, and a third CoMP CSI report type having content for the serving cell and the at least one coordinating cell; and transmitting, by the UE, the CSI corresponding to the determined CoMP CSI report type to a base station via an uplink data channel.