Patent ID: 9716539
Date: 2017-07-25
CPC Classifications: H04B,H04L,H04W

Claim:
1. A method for reporting channel state information (CSI) by a user equipment (UE) having a plurality of CSI processes in a wireless communication system, the method comprising: receiving information designating a specific CSI process of the plurality of CSI processes that the UE should use to determine CSI; measuring a channel based on a CSI-reference signal (CSI-RS) configuration associated with the specific CSI process of the plurality of CSI processes; measuring an interference based on a CSI-interference measurement (CSI-IM) configuration associated with the specific CSI process; determining the CSI for the specific CSI process based on the measured channel and the measured interference by using one codebook type of a plurality of codebook types, wherein the plurality of codebook types for CSI reporting are configured individually for each CSI process; determining a precoding matrix from the one of the plurality of codebook types in order to report the CSI corresponding to the specific CSI process; and reporting the CSI determined for the specific CSI process.