US 12,216,222 B2
Reference signal design and device procedures for downlink-based positioning/ranging using multi-frequency phase difference of arrival
Loran Jatunov, Raritan, NJ (US); Hussain Elkotby, Conshohocken, PA (US); Tanbir Haque, Jackson Heights, NY (US); Patrick Cabrol, Bayshore, NY (US); and Ravikumar Pragada, Warrington, PA (US)
Assigned to InterDigital Patent Holdings, Inc., Wilmington, DE (US)
Appl. No. 17/796,187
Filed by INTERDIGITAL PATENT HOLDINGS, INC., Wilmington, DE (US)
PCT Filed Jan. 29, 2021, PCT No. PCT/US2021/015793
§ 371(c)(1), (2) Date Jul. 28, 2022,
PCT Pub. No. WO2021/155210, PCT Pub. Date Aug. 5, 2021.
Claims priority of provisional application 63/051,709, filed on Jul. 14, 2020.
Claims priority of provisional application 62/967,953, filed on Jan. 30, 2020.
Prior Publication US 2023/0074373 A1, Mar. 9, 2023
Int. Cl. G01S 5/02 (2010.01); G01S 11/02 (2010.01); G01S 13/84 (2006.01); H04W 64/00 (2009.01)
CPC G01S 5/0244 (2020.05) [G01S 11/02 (2013.01); G01S 13/84 (2013.01); H04W 64/003 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method performed by a wireless transmit receive unit (WTRU) that is configured for use in a zero energy (ZE) interface, the method comprising:
receiving a message indicating a plurality of positioning reference signal (PRS) configurations, wherein each PRS configuration provides frequency and time resources for reception, by the WTRU, of a plurality of PRSs, and wherein the message indicates a default PRS configuration;
upon a condition that the default PRS configuration is not suitable for one or more capabilities or requirements of the WTRU, transmitting a message including a request to use another one of the plurality of PRS configurations, wherein the another one of the plurality of PRS configurations is requested based on the one or more capabilities or requirements of the WTRU;
receiving a message indicating ranging assistance information applicable during a time duration;
receiving, within the time duration, the plurality of PRSs using the another one of the plurality of PRS configurations and using the indicated ranging assistance information; and
transmitting a report indicating a range estimate that meets a required accuracy, wherein the range estimate is based on a phase difference of arrival (PDOA) of the received plurality of PRSs.