Patent ID: 9413442
Filing Date: 2016-08-09
CPC Classification: H04B,H04L

Claim Text:
1. A method for reporting channel state information (CSI) by user equipment (UE) in a wireless communication system, the method comprising: determining reporting timing of a rank indicator (RI) corresponding to a precoding type indicator (PTI) having a value of 0; determining reporting timing of a wideband first precoding matrix indicator (PMI); determining reporting timing of a wideband second PMI and wideband channel quality indicator (CQI); and reporting the CSI based on the result of the reporting timing determinations, wherein CSI subsequent to the determined reporting timing of the RI corresponding to the PTI having the value of 0 is the wideband first PMI, wherein reporting of the wideband second PMI and wideband CQI is dropped after the determined reporting timing of the RI corresponding to the PTI having the value of 0, and wherein the wideband first PMI is reported instead of the dropped wideband second PMI and wideband CQI at a CSI reporting timing immediately after the determined reporting timing of the RI corresponding to the PTI having the value of 0.