US 11,990,966 B2
Channel state information feedback method and apparatus
Jian Yu, Shenzhen (CN); Weimin Wu, Wuhan (CN); and Jing Dai, Wuhan (CN)
Assigned to HUAWEI TECHNOLOGIES CO., LTD., Shenzhen (CN)
Filed by Huawei Technologies Co., Ltd., Shenzhen (CN)
Filed on Sep. 30, 2022, as Appl. No. 17/957,563.
Application 17/957,563 is a continuation of application No. 17/314,422, filed on May 7, 2021, granted, now 11,483,048.
Application 17/314,422 is a continuation of application No. PCT/CN2019/116318, filed on Nov. 7, 2019.
Claims priority of application No. 201811321478.9 (CN), filed on Nov. 7, 2018.
Prior Publication US 2023/0097165 A1, Mar. 30, 2023
Int. Cl. H04L 27/28 (2006.01); H04B 7/06 (2006.01)
CPC H04B 7/0626 (2013.01) [H04B 7/0617 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A channel state information feedback method implemented by a beamformer and comprising:
generating a null data packet announcement (NDPA) frame, wherein the NDPA frame comprises:
a sounding dialog token field comprising an NDPA type that indicates a type of the NDPA frame, and wherein the NDPA type comprises two bits that are set to 00 to indicate that the NDPA frame is a very high throughput (VHT) NDPA frame, to 01 to indicate that the NDPA frame is a high efficiency (HE) NDPA frame, to 10 to indicate that the NDPA frame is a ranging NDPA frame, or to 11 to indicate that that the NDPA frame is an extremely high throughput (EHT) NDPA frame; and
one or more pieces of station information comprising a processing mode bitmap that indicates processing modes of channel state information of respective feedback elements; and
sending the NDPA frame.