US 11,678,347 B2
Need-based antenna switching in Wi-Fi angle-of-arrival locationing
Matthew Aaron Silverman, Shaker Heights, OH (US); Ardalan Alizadeh, Milpitas, CA (US); Michael Barry DeLong, Macedonia, OH (US); and Guru Prasanna Gopalakrishnan, San Jose, CA (US)
Assigned to Cisco Technology, Inc., San Jose, CA (US)
Filed by Cisco Technology, Inc., San Jose, CA (US)
Filed on Jan. 8, 2021, as Appl. No. 17/145,249.
Prior Publication US 2022/0225317 A1, Jul. 14, 2022
Int. Cl. H04W 72/04 (2023.01); H04W 72/51 (2023.01); G01S 3/26 (2006.01); H04W 72/044 (2023.01); H04W 84/12 (2009.01)
CPC H04W 72/51 (2023.01) [G01S 3/26 (2013.01); H04W 72/046 (2013.01); H04W 84/12 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method comprising:
receiving, in a block based modulation environment, one or more packets from a client at one or more switchable antennas of an access point, the access point having a plurality of switchable antennas, each switchable antenna having an antenna state;
switching among the plurality of switchable antennas such that at least five of the antenna states are sampled wherein switching among the plurality of switchable antennas such that the at least five of the antenna states are sampled comprises:
receiving, at the access point, a bitmap from a host, the bitmap indicating one or more antenna states that have not been sampled for the client; and
switching to sample the one or more antenna states that have not been sampled for the client; and
calculating angle of arrival of the client based on the at least five of the antenna states.