Patent ID: 9621319
Date: 2017-04-11
CPC Classifications: H04B,H04L,H04W

Claim:
1. A method for feeding back Channel State Information (CSI) using a common subband at a user equipment in a wireless communication system, comprising: determining a prescribed SubFrame Threshold (SFT) based on a mobility of the user equipment and a channel change rate; transmitting first CSI based on the common subband to at least one base station at a first transmission time point according to a first CSI feedback configuration; determining whether or not a second transmission time point for transmitting second CSI is within the prescribed SFT; generating the second CSI based on the common subband if the second transmission time point is within the prescribed SFT or based on a subband selected according to a channel state of the second transmission time point if the second transmission time point is not within the prescribed SFT; and transmitting the second CSI to the at least one base station at the second transmission time point according to a second CSI feedback configuration.