US 12,457,016 B2
Transmission and receiving method; and apparatus for using trigger frames to schedule a second access point
Mao Yang, Xi'an (CN); Bo Li, Xi'an (CN); and Yunbo Li, Shenzhen (CN)
Assigned to Huawei Technologies Co., Ltd., Shenzhen (CN)
Filed by HUAWEI TECHNOLOGIES CO., LTD., Guangdong (CN)
Filed on Sep. 8, 2021, as Appl. No. 17/468,862.
Application 17/468,862 is a continuation of application No. PCT/CN2020/078164, filed on Mar. 6, 2020.
Claims priority of application No. 201910177084.9 (CN), filed on Mar. 8, 2019.
Prior Publication US 2021/0409075 A1, Dec. 30, 2021
Int. Cl. H04W 4/00 (2018.01); H04B 7/024 (2017.01); H04B 7/0452 (2017.01); H04W 72/121 (2023.01)
CPC H04B 7/024 (2013.01) [H04B 7/0452 (2013.01); H04W 72/121 (2013.01)] 10 Claims
OG exemplary drawing
 
1. An information transmission method, comprising:
generating, by a first access point (AP), a slave AP trigger frame, wherein the slave AP trigger frame comprises a trigger type information field or subfield, AP indication information, and a transmission identifier field, the trigger type information field or subfield of the slave AP trigger frame indicates a trigger type of the slave AP trigger frame, the AP indication information comprises an identifier of a second AP, the identifier of the second AP indicates the second AP, the transmission identifier field identifying a frame to be transmitted in coordination, the slave AP trigger frame is configured to trigger the second AP to send a physical protocol data unit (PPDU), and the PPDU carries the frame corresponding to the trigger type of the slave AP trigger frame, wherein the slave AP trigger frame comprises a null data packet announcement (NDPA) channel sounding subtype frame, or a null data packet (NDP) channel sounding subtype frame, or a beamforming report poll (BFRP) channel sounding subtype frame; and
sending, by the first AP, the slave AP trigger frame addressing the second AP, thereby slaving an operation of the second AP triggered by the slave AP trigger frame.