Patent ID: 9596067
Date: 2017-03-14
CPC Classifications: H04B,H04L,H04W

Claim:
1. A method for reporting Channel State Information (CSI) by a user equipment (UE) in a wireless communication system, the method comprising: receiving multiple zero-power CSI-reference signal (ZP CSI-RS) configurations associated with multiple transmission points configured to perform coordinated multi-point (CoMP) operation for the UE; receiving an enhanced physical downlink control channel (EPDCCH) configuration that identifies one of the multiple ZP CSI-RS configuration; receiving information on a CSI process associated with a CSI-RS configuration and a CSI-Interference Measurement (CSI-IM) configuration; receiving, via an EPDCCH, downlink control information (DCI) indicating the CSI process; and transmitting the CSI based on at least one of the CSI-RS configuration and the CSI-IM configuration for the CSI process, wherein, in receiving the DCI, the UE determines that the DCI of the EPDCCH is not mapped to a resource of a ZP CSI-RS configuration that is identified by the EPDCCH configuration, wherein the CSI-IM configuration indicates resource elements, a period and a subframe offset for interference measurement, and wherein the resource elements, the period and the subframe offset indicated by the CSI-IM configuration are included in one of the multiple ZP CSI-RS configurations.