US 12,003,300 B2
Hierarchical channel state information (CSI) feedback with partial reciprocity in a network
Weidong Yang, San Diego, CA (US); Chunhai Yao, Beijing (CN); Chunxuan Ye, San Diego, CA (US); Dawei Zhang, Cupertino, CA (US); Haitong Sun, Cupertino, CA (US); Hong He, Cupertino, CA (US); Ismael Gutierrez Gonzalez, Sunnyvale, CA (US); Jie Cui, Cupertino, CA (US); Oghenekome Oteri, San Diego, CA (US); Sigen Ye, Cupertino, CA (US); Wei Zeng, Cupertino, CA (US); Yang Tang, Cupertino, CA (US); and Yushu Zhang, Beijing (CN)
Assigned to Apple Inc., Cupertino, CA (US)
Appl. No. 17/442,429
Filed by Apple Inc., Cupertino, CA (US)
PCT Filed Aug. 7, 2020, PCT No. PCT/CN2020/107926
§ 371(c)(1), (2) Date Sep. 23, 2021,
PCT Pub. No. WO2022/027631, PCT Pub. Date Feb. 10, 2022.
Prior Publication US 2023/0208488 A1, Jun. 29, 2023
Int. Cl. H04B 7/06 (2006.01); H04B 7/0456 (2017.01); H04L 5/00 (2006.01)
CPC H04B 7/0626 (2013.01) [H04B 7/0478 (2013.01); H04L 5/0051 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A base station, comprising:
a memory;
one or more processors configured to:
transmit a channel state information reference signal (CSI-RS) for CSI feedback; and
receive channel state information (CSI) feedback corresponding to one or more frequency parts at hierarchical precoding levels of a frequency band based on a hierarchical precoding scheme in response to providing the CSI-RS.