Patent ID: 9712214
Date: 2017-07-18
CPC Classifications: H04B

Claim:
1. A method in a user equipment (UE) for feeding back channel state information (CSI), comprising: acquiring a set of CSI processes which are configured by a transmission point (TP); acquiring a sub-band (SB) inheritance which is configured by a TP for a CSI process from the set of CSI processes; calculating the CSI based on the configuration for the CSI process; and feeding the calculated CSI back to a TP, wherein for a CSI process which supports non-coordinated multi-point (COMP) transmission, no inheritance is configured, for a CSI process which supports non-coherent joint transmission (JT) and frequency-domain dynamic point selection/dynamic point blanking (DPS/DPB) transmission, an RI inheritance is configured and no SB inheritance is configured, for a CSI process which supports independent multi-point transmissions, no RI inheritance is configured and an SB inheritance is configured, and/or for a CSI process which supports coherent JT transmission, an RI inheritance and an SB inheritance are configured.