IP Library › Granted Patent US 12,707,417
Granted Patent B2
US 12,707,417 · App. 18/019,366 · Granted Aug 11, 2026

Methods for reference signal configuration in wireless systems

Inventors: Jaya Rao (Montreal, CA); Fumihiro Hasegawa (Westmount, CA); Moon Il Lee (Melville, NY); Aata El Hamss (Laval, CA); Tuong Hoang (Montreal, CA); Ghyslain Pelletier (Montreal, CA); Paul Marinier (Brossard, CA); Janet Stern-Berkowitz (Little Neck, NY)
Assignee: INTERDIGITAL PATENT HOLDINGS, INC.
H04W64/00H04L5/0051
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Quick Facts
Patent No.
US 12,707,417
App. No.
18/019,366
Filed
Feb 2, 2023
Granted
Aug 11, 2026
Kind
B2
Art Unit
2642
USPC
455/456.1
Abstract

A method performed by a WTRU may comprise receiving PRS configuration information and performing a first set of measurements based on the PRS configuration. The method may further comprise determining whether to trigger an on-demand PRS request based on the first set of measurements and on-demand PRS criteria. On a condition that the determining to trigger is affirmative, transmitting an on-demand PRS request. In embodiments, the on-demand PRS criteria may be based on an RSRP, TDoA, number of multipaths, accuracy and/or latency.

Claims (36)

1 . A method performed by a wireless transmit/receive unit (WTRU), the method comprising:

receiving positioning reference signal (PRS) configuration information including (i) an initial PRS configuration for one or more transmission/reception points (TRPs) and (ii) information indicating a mapping between the one or more TRPs and associated PRS pre-configuration IDs;

performing, based on the received PRS configuration information, a first set of measurements on a PRS received according to the initial PRS configuration;

determining, by the WTRU, to trigger an on-demand PRS request based on the first set of measurements and on-demand PRS criteria, wherein the on-demand PRS criteria is based on one or more of a reference signal receive power (RSRP), a time difference of arrival (TDoA), or a number of multipath signals;

in response to determining to trigger the on-demand PRS request, selecting, using the mapping, a PRS pre-configuration ID from among the associated PRS pre-configuration IDs, the PRS pre-configuration ID corresponding to a PRS configuration to be requested via the on-demand PRS request, wherein the PRS configuration to be requested is an aperiodic PRS configuration or a semi-persistent PRS configuration; and

transmitting the on-demand PRS request including an indication of the PRS configuration to be requested and the selected PRS pre-configuration ID.

2 . The method of claim 1 , wherein the first set of measurements correspond to one or more cells or TRPs.

3 . The method of claim 1 , wherein the on-demand PRS criteria is further based on a positioning accuracy requirement.

4 . The method of claim 1 , wherein the on-demand PRS criteria is further based on a positioning latency requirement.

5 . The method of claim 1 , wherein the PRS configuration information is received from a Location Management Function (LMF).

6 . The method of claim 1 , wherein the determining, by the WTRU, to trigger the on-demand PRS request is based on one or more configured thresholds.

7 . The method of claim 1 , wherein transmitting the on-demand PRS request further comprises:

transmitting, in the on-demand PRS request, an indication including one or more of a TRP identifier associated with the selected PRS pre-configuration ID or an urgency of the on-demand PRS request, to a serving base station or a Location Management Function (LMF).

8 . The method of claim 1 , further comprising:

on a condition that a confirmation of the request or an on-demand configuration of the request is received:

performing a second set of measurements on one or more resources of the requested or received on-demand PRS configuration; and

transmitting a report including one or more of the second set of measurements or the selected PRS pre-configuration ID to a base station or a Location Management Function (LMF).

9 . A wireless transmit/receive unit (WTRU) comprising:

a transceiver; and

a processor:

wherein the transceiver and the processor are configured to:

receive positioning reference signal (PRS) configuration information including (i) an initial PRS configuration for one or more transmission/reception points (TRPs) and (ii) information indicating a mapping between the one or more TRPs and associated PRS pre-configuration IDs;

perform, based on the received PRS configuration information, a first set of measurements on a PRS received according to the initial PRS configuration;

determine whether to trigger an on-demand PRS request based on the first set of measurements and on-demand PRS criteria, wherein the on-demand PRS criteria is based on one or more of a reference signal receive power (RSRP), a time difference of arrival (TDoA), or a number of multipath signals;

on a condition that the WTRU determines to trigger the on-demand PRS request, selecting, using the mapping, a PRS pre-configuration ID from among the associated PRS pre-configuration IDs, the PRS pre-configuration ID corresponding to a PRS configuration to be requested via the on-demand PRS request, wherein the PRS configuration to be requested is an aperiodic PRS configuration or a semi-persistent PRS configuration; and

transmit the on-demand PRS request including an indication of the PRS configuration to be requested and the selected PRS pre-configuration ID.

10 . The WTRU of claim 9 , wherein the first set of measurements correspond to one or more cells or TRPs.

11 . The WTRU of claim 9 , wherein the PRS configuration information is received from a Location Management Function (LMF).

12 . The WTRU of claim 9 , wherein the determination of whether to trigger the on-demand PRS request is based on one or more configured thresholds.

13 . The WTRU of claim 9 , wherein the transceiver is further configured to:

transmit, in the on-demand PRS request, an indication including one or more of a TRP identifier associated with the selected PRS pre-configuration ID or an urgency of the on-demand PRS request, to a serving base station or a Location Management Function (LMF).

14 . The WTRU of claim 9 , wherein the transceiver and the processor are further configured to:

perform a second set of measurements on one or more resources of a configured on-demand PRS; and

transmit a report including one or more of the second set of measurements or the selected PRS pre-configuration ID to a base station or a Location Management Function (LMF).

15 . The WTRU of claim 9 , wherein the on-demand PRS criteria is further based on a positioning accuracy requirement.

16 . The WTRU of claim 9 , wherein the on-demand PRS criteria is further based on a positioning latency requirement.

Continuity (6)
Provisional Application 63185710 · May 7, 2021
Provisional Application 63167781 · Mar 30, 2021
Provisional Application 63130037 · Dec 23, 2020
Provisional Application 63091694 · Oct 14, 2020
Provisional Application 63061714 · Aug 5, 2020
Related Publication 20240015686A1 · Jan 11, 2024
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