US 11,817,929 B2
Channel state information measurement method and apparatus and network side device
Yunfeng Sun, Shanghai (CN); Guibao Li, Xi'an (CN); Chenhong Lu, Shenzhen (CN); Qunfang Lou, Shanghai (CN); Zhiying Wang, Shanghai (CN); and Feng Li, Xi'an (CN)
Assigned to Huawei Technologies Co., Ltd., Shenzhen (CN)
Filed by Huawei Technologies Co., Ltd., Shenzhen (CN)
Filed on Sep. 24, 2021, as Appl. No. 17/484,936.
Application 17/484,936 is a continuation of application No. PCT/CN2020/080580, filed on Mar. 23, 2020.
Claims priority of application No. 201910227899.3 (CN), filed on Mar. 25, 2019.
Prior Publication US 2022/0014250 A1, Jan. 13, 2022
Int. Cl. H04B 7/06 (2006.01); H04L 5/00 (2006.01); H04W 24/08 (2009.01)
CPC H04B 7/0626 (2013.01) [H04L 5/0048 (2013.01); H04W 24/08 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A channel state information measurement method, comprising:
configuring, by a network side device, channel state information reference signal (CSI-RS) transmit information of M access points, wherein the CSI-RS transmit information is used to indicate to the M access points to periodically send a CSI-RS to a first user equipment at a preset interval, wherein the preset interval is a time interval and/or a subband interval, and wherein M is an integer greater than 1; and
obtaining, by the network side device, channel state information (CSI) corresponding to each of the M access points, wherein the CSI corresponding to each access point, of the M access points, comprises first CSI, and wherein the first CSI is information that is measured based on the CSI-RS corresponding to the access point and fed back by the first user equipment,
wherein a precoding matrix indicator (PMI) in the CSI corresponding to the access point is fed back, in accordance with the preset interval being the subband interval, at a granularity of a subband.