US 11,716,137 B2
Terrestrial wireless positioning in licensed and unlicensed frequency bands
Andrei Dragos Radulescu, San Diego, CA (US); Hem Agnihotri, Benares (IN); Stephen William Edge, Escondido, CA (US); Sven Fischer, Nuremberg (DE); Bapineedu Chowdary Gummadi, Hyderabad (IN); and Venkata A Naidu Babbadi, Hyderabad (IN)
Assigned to QUALCOMM Incorporated, San Diego, CA (US)
Filed by QUALCOMM Incorporated, San Diego, CA (US)
Filed on Dec. 10, 2020, as Appl. No. 17/118,401.
Application 17/118,401 is a continuation of application No. 16/586,766, filed on Sep. 27, 2019, granted, now 10,887,005.
Application 16/586,766 is a continuation of application No. 15/607,409, filed on May 26, 2017, granted, now 10,461,847, issued on Oct. 29, 2019.
Prior Publication US 2021/0091851 A1, Mar. 25, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. H04B 7/26 (2006.01); H04W 16/16 (2009.01); H04W 64/00 (2009.01)
CPC H04B 7/2634 (2013.01) [H04B 7/2637 (2013.01); H04W 16/16 (2013.01); H04W 64/003 (2013.01)] 30 Claims
OG exemplary drawing
 
1. A method at a user equipment (UE) for determining a distance from the UE to a base station, comprising:
transmitting a first positioning reference signaling (PRS) signal to the base station at a first time, wherein the first PRS signal is received by the base station at a second time, and wherein the first time corresponds to the start of a first subframe of a cellular radio access technology (RAT) utilizing unlicensed radio frequency spectrum;
receiving a second PRS signal from the base station at a third time, wherein the second PRS signal is transmitted by the base station at a fourth time, and wherein the fourth time corresponds to the start of a second subframe of the cellular RAT; and
enabling the distance to be determined based on the first time, the second time, the third time, and the fourth time.