US 12,135,367 B2
Methods and systems for locating a user equipment device based on signal travel time and bias suppression
Per J Skoglar, Linköping (SE); and David A Tornqvist, Linghem (SE)
Assigned to Verizon Patent and Licensing Inc., Basking Ridge, NJ (US)
Filed by Verizon Patent and Licensing Inc., Basking Ridge, NJ (US)
Filed on Dec. 8, 2021, as Appl. No. 17/545,438.
Prior Publication US 2023/0176206 A1, Jun. 8, 2023
Int. Cl. G01S 13/87 (2006.01); G01S 5/02 (2010.01); G01S 5/10 (2006.01); H04W 4/029 (2018.01)
CPC G01S 13/876 (2013.01) [G01S 5/021 (2013.01); G01S 5/10 (2013.01); H04W 4/029 (2018.02)] 20 Claims
OG exemplary drawing
 
1. A method comprising:
determining, by a user equipment (UE) locator system, a time measurement indicative of a signal travel time between a UE device and an access point device, the signal travel time corresponding to an apparent distance, presuming a line-of-sight (LoS) signal travel path, between a location of the UE device and a location of the access point device;
determining, by the UE locator system, a set of hypothesis locations for the UE device;
accessing, by the UE locator system from a bias suppression datastore, bias suppression data configured for use in suppressing an influence of a bias between the apparent distance and a true distance between the location of the UE device and the location of the access point device, the bias suppression data corresponding to each hypothesis location in the set of hypothesis locations for the UE device; and
estimating, by the UE locator system based on the time measurement and the bias suppression data, the location of the UE device by determining a weighted average location based on the set of hypothesis locations and a respective weight assigned to each hypothesis location in the set based on respective degrees of agreement between the time measurement and the bias suppression data for each of the hypothesis locations in the set.