US 12,120,534 B1
Interactive physical placement of devices for optimal motion sensing using channel state information (CSI)
Ravi Ichapurapu, Morgan Hill, CA (US); Durga Laxmi Narayana Swamy Inti, Kakinada (IN); Dhruv Kohli, Fremont, CA (US); and Adithya Subramanian, Santa Clara, CA (US)
Assigned to Amazon Technologies, Inc., Seattle, WA (US)
Filed by Amazon Technologies, Inc., Seattle, WA (US)
Filed on Jul. 28, 2021, as Appl. No. 17/387,703.
Int. Cl. H04L 12/00 (2006.01); H04L 67/12 (2022.01); H04W 24/02 (2009.01); H04W 24/10 (2009.01)
CPC H04W 24/02 (2013.01) [H04L 67/12 (2013.01); H04W 24/10 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A method comprising:
receiving, at a first time, first channel state information (CSI) data representing channel properties of a wireless channel used by a first wireless device and a second wireless device, wherein the first wireless device is located at a first location in an environment and the second wireless device is located at a second location in the environment;
determining that (i) a size of the first CSI data is less than a first threshold or (ii) the first CSI data is not received in a first specified time interval;
sending, to a user device, a first indication that the first location of the first wireless device is not valid;
receiving, at a second time after the first time, second CSI data representing channel properties of the wireless channel, wherein the first wireless device is located at a third location at the second time;
determining that (iii) a size of the second CSI data exceeds the first threshold or (iv) the second CSI data is received in a second specified time interval;
determining that the second CSI data corresponds to first ground truth data and indicates that there is no motion in the environment; or
determining that the second CSI data corresponds to second ground truth data and indicates that there is motion in the environment; and
sending, to the user device, a second indication that the third location of the first wireless device is valid.