US 12,292,522 B2
Determining a position of user equipment by using adaptive phase-changing devices
Jibing Wang, San Jose, CA (US); and Erik Richard Stauffer, Sunnyvale, CA (US)
Assigned to Google LLC, Mountain View, CA (US)
Appl. No. 18/005,555
Filed by Google LLC, Mountain View, CA (US)
PCT Filed Jul. 15, 2021, PCT No. PCT/US2021/041802
§ 371(c)(1), (2) Date Jan. 13, 2023,
PCT Pub. No. WO2022/015965, PCT Pub. Date Jan. 20, 2022.
Claims priority of provisional application 63/058,319, filed on Jul. 29, 2020.
Claims priority of provisional application 63/053,560, filed on Jul. 17, 2020.
Prior Publication US 2023/0258759 A1, Aug. 17, 2023
Int. Cl. G01S 5/00 (2006.01); G01S 5/02 (2010.01)
CPC G01S 5/0036 (2013.01) [G01S 5/0273 (2013.01); G01S 2205/008 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method performed by a base station for determining a position of a user equipment, UE, by using multiple adaptive phase-changing devices, APDs, the method comprising:
transmitting a first wireless signal toward a first reconfigurable intelligent surface, RIS, of a first APD among the multiple APDs, the first APD being located at a first position;
receiving, from the UE via a wireless connection, a first identifier associated with a first reflection of the first wireless signal received by the UE from the first APD;
transmitting a second wireless signal toward a second RIS of a second APD among the multiple APDs, the second APD being located at a second position;
receiving, from the UE via the wireless connection, a second identifier associated with a second reflection of the second wireless signal received by the UE from the second APD;
determining a first reflected angle off the first RIS of the first APD for the first reflection of the first wireless signal based on the first identifier;
determining a second reflected angle off the second RIS of the second APD for the second reflection of the second wireless signal based on the second identifier; and
determining the position of the UE based on the first reflected angle of the first reflection, the second reflected angle of the second reflection, the first position of the first APD, and the second position of the second APD.