US 11,747,466 B2
Sidelink ranging with reconfigurable intelligent surface-user equipment co-location
Shuanshuan Wu, San Diego, CA (US); Junyi Li, Fairless Hills, PA (US); Kapil Gulati, Belle Mead, NJ (US); Anantharaman Balasubramanian, San Diego, CA (US); and Sourjya Dutta, San Diego, CA (US)
Assigned to QUALCOMM Incorporated, San Diego, CA (US)
Filed by QUALCOMM Incorporated, San Diego, CA (US)
Filed on Aug. 23, 2021, as Appl. No. 17/409,737.
Prior Publication US 2023/0058156 A1, Feb. 23, 2023
Int. Cl. G01S 13/87 (2006.01); G01S 13/76 (2006.01); G01S 7/00 (2006.01)
CPC G01S 13/876 (2013.01) [G01S 7/006 (2013.01); G01S 13/765 (2013.01)] 30 Claims
OG exemplary drawing
 
1. An apparatus for wireless communication at a first user equipment (UE), comprising:
a memory; and
at least one processor coupled to the memory and configured to:
receive, from a second UE, an indication that the second UE is associated with at least one reconfigurable intelligent surface (RIS);
transmit one or more sidelink reference signals to the at least one RIS associated with the second UE based on the indication;
receive one or more reflected reference signals reflected from the at least one RIS; and
calculate a signal round-trip time (RTT) based on the one or more sidelink reference signals and the one or more reflected reference signals.