US 12,445,998 B2
Methods, systems and computer program products for determining location of tags in an environment using mobile antennas
Seth Edward-Austin Hollar, Raleigh, NC (US); and Ryan Michael Tedrick, Raleigh, NC (US)
Assigned to Wiser Systems, Inc., Raleigh, NC (US)
Filed by Wiser Systems, Inc., Raleigh, NC (US)
Filed on Nov. 10, 2023, as Appl. No. 18/506,443.
Application 18/506,443 is a continuation of application No. 17/155,406, filed on Jan. 22, 2021, granted, now 11,856,551.
Claims priority of provisional application 62/965,361, filed on Jan. 24, 2020.
Prior Publication US 2024/0080796 A1, Mar. 7, 2024
Int. Cl. H04W 4/40 (2018.01); H01Q 5/25 (2015.01); H04W 4/02 (2018.01); H04W 4/80 (2018.01); H04W 24/10 (2009.01); H04W 64/00 (2009.01)
CPC H04W 64/003 (2013.01) [H01Q 5/25 (2015.01); H04W 4/025 (2013.01); H04W 4/40 (2018.02); H04W 4/80 (2018.02); H04W 24/10 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A system for determining location of tags in an environment, the system comprising:
at least one mobile antenna that moves around the environment, wherein an absolute location associated with the at least one mobile antenna is known and wherein the at least one mobile antenna sends and receives messages including at least one of time of arrival, time of departure, signal strength and angle of arrival;
a measurement module that performs distance measurements between the at least one mobile antenna and at least one tag in the environment to obtain at least, the distance measurements being associated with at least two locations of the at least one mobile antenna;
a storage module that records the distance measurements at the at least two locations and the at least two locations;
a location module that computes a location of each of the at least one tags based on the recorded distance measurements at the at least two locations and the recorded at least two locations of the mobile antenna; and
at least one camera and wherein the location module processes images or videos obtained by the at least one camera to deduce the location of the at least one mobile antenna,
wherein an orientation of one of the mobile antennas is determined using angle of arrival measurements related to other fixed or mobile antenna devices; and
wherein the location module detects a mobile antenna when it enters a defined environment and forms an ad hoc network with the mobile antenna entering the defined environment and other mobile antennas and stationary antennas already within in the defined environment and wherein the ad hoc network performs cooperative localization of tags.