US 11,700,044 B2
Apparatus and methods for multi-AP joint transmission and reception
Young Hoon Kwon, Laguna Niguel, CA (US); Liwen Chu, San Ramon, CA (US); Sudhir Srinivasa, Los Gatos, CA (US); Hongyuan Zhang, Fremont, CA (US); and Huiling Lou, Sunnyvale, CA (US)
Assigned to NXP USA, Inc., Austin, TX (US)
Filed by NXP USA, Inc., Austin, TX (US)
Filed on Nov. 10, 2020, as Appl. No. 17/94,645.
Claims priority of provisional application 62/983,292, filed on Feb. 28, 2020.
Claims priority of provisional application 62/980,345, filed on Feb. 23, 2020.
Claims priority of provisional application 62/933,863, filed on Nov. 11, 2019.
Prior Publication US 2021/0143884 A1, May 13, 2021
Int. Cl. H04B 7/06 (2006.01); H04W 72/04 (2023.01); H04B 7/0413 (2017.01); H04W 88/06 (2009.01); H04W 88/02 (2009.01)
CPC H04B 7/0626 (2013.01) [H04B 7/0413 (2013.01); H04W 72/04 (2013.01); H04W 88/02 (2013.01); H04W 88/06 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A method for joint sounding by a client with a master access point (AP) and a slave AP, comprising:
receiving a message from the master AP;
applying network allocation vector (NAV) rules to update NAV values, wherein the received message which is identified as inter-BSS causes an intra-basic service set (BSS) NAV to be set based on the updated NAV values when a transmit address (TA) of the received message has a prespecified value;
receiving a first trigger frame identified as inter-BSS, the trigger frame having a TA with the prespecified value; and
transmitting a first channel state information (CSI) to the master AP when the channel is idle based on the updated NAV values of the intra-BSS NAV in response to the trigger frame.