US 11,688,263 B2
Motion detection using wireless local area networks
Dongeek Shin, Santa Clara, CA (US); Yu Wen, San Ramon, CA (US); Zhifeng Cai, Palo Alto, CA (US); Brian Mitchell Silverstein, San Carlos, CA (US); Raymond Reynolds Hayes, Los Gatos, CA (US); and Kevin N. Hayes, Mountain View, CA (US)
Assigned to Google LLC, Mountain View, CA (US)
Appl. No. 17/294,268
Filed by Google LLC, Mountain View, CA (US)
PCT Filed Jan. 8, 2019, PCT No. PCT/US2019/012793
§ 371(c)(1), (2) Date May 14, 2021,
PCT Pub. No. WO2020/145949, PCT Pub. Date Jul. 16, 2020.
Prior Publication US 2022/0005337 A1, Jan. 6, 2022
Int. Cl. G08B 21/02 (2006.01); G08B 21/04 (2006.01); G08B 29/18 (2006.01); H04L 5/00 (2006.01); H04L 67/00 (2022.01); H04W 4/02 (2018.01); G08B 13/24 (2006.01); H04L 67/104 (2022.01)
CPC G08B 21/043 (2013.01) [G08B 29/188 (2013.01); H04L 5/0055 (2013.01); H04L 67/34 (2013.01); H04W 4/027 (2013.01); G08B 13/2491 (2013.01); H04L 67/104 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for classifying motion, by a first wireless local area network (WLAN) device, the method comprising:
transmitting, by the first WLAN device, a sounding packet to a second WLAN device, the first WLAN device being a WLAN Access Point (AP) and the second WLAN device being a WLAN AP;
receiving, from the second WLAN device, an acknowledgement (ACK) of receiving the sounding packet by the second WLAN device;
using the received ACK, determining Channel State Information (CSI) for a radio frequency (RF) signal path between the first WLAN device and the second WLAN device;
aggregating the determined CSI with additional CSI; and
determining, using the aggregated CSI, a presence or a motion within a structure for classification.