Dilution of precision-assisted reporting for low latency or on-demand positioning

1. A method of wireless positioning performed by a user equipment (UE) comprising:

receiving a dilution of precision (DOP) threshold;

identifying one or more sets of transmission-reception points (TRPs) from a plurality of K sets of M TRPs, wherein K is a number of sets of TRPs and M is a number of TRPs, and wherein the plurality of K sets of M TRPs is selected from all TRPs from which the UE can measure positioning reference signals (PRS) until a highest priority set of M TRPs that satisfies the DOP threshold is identified;

performing one or more positioning measurements of PRS transmitted by at least one set of TRPs of the one or more sets of TRPs, wherein at least the at least one set of TRPs of the one or more sets of TRPs satisfies the DOP threshold, and wherein the at least one set of TRPs is the highest priority set of M TRPs; and

reporting the one or more positioning measurements or location information derived from the one or more positioning measurements.

2. The method of claim 1 , wherein a number of TRPs in each of the one or more sets of TRPs is less than a threshold.

3. The method of claim 2 , further comprising:

selecting the plurality of K sets of M TRPs from all TRPs from which the UE can measure PRS, wherein M is less than or equal to the threshold.

4. The method of claim 3 , further comprising:

measuring PRS from each TRP in each of the plurality of K sets of M TRPs to determine a DOP for each of the plurality of K sets of M TRPs.

5. The method of claim 4 , further comprising:

assigning a priority to each set of M TRPs of the plurality of K sets of M TRPs based on the DOP for the respective set of M TRPs.

6. The method of claim 3 , wherein:

the plurality of K sets of M TRPs are selected until a smallest set of M TRPs that satisfies the DOP threshold is identified, and

the at least one set of TRPs is the smallest set of M TRPs.

7. The method of claim 3 , further comprising:

assigning a priority to each of the plurality of K sets of M TRPs.

8. The method of claim 3 , further comprising:

receiving N, M, and K from a serving base station or a location server.

9. The method of claim 3 , wherein a smaller size of K and a larger size of M is selected with each successive selection of the plurality of K sets of M TRPs.

10. The method of claim 3 , wherein a larger size of K and a smaller size of M is selected with each successive selection of the plurality of K sets of M TRPs.

11. The method of claim 3 , wherein a smaller size of K and a smaller size of M is selected with each successive selection of the plurality of K sets of M TRPs.

12. The method of claim 1 , further comprising:

transmitting a coarse location to a serving base station or a location server; and

receiving identifiers of the one or more sets of TRPs from the serving base station or the location server based on the coarse location of the UE.

13. The method of claim 12 , wherein the identifiers of the one or more sets of TRPs are received based on a determination over a plurality of positioning sessions that the one or more sets of TRPs will satisfy the DOP threshold based on the coarse location of the UE.

14. The method of claim 12 , further comprising:

determining the coarse location based on measurements of reference signals transmitted by a single TRP, a global navigation satellite system (GNSS) location of the UE, an inertial navigation location of the UE, reference signals transmitted by one or more wireless local area network (WLAN) access points, or any combination thereof.

15. The method of claim 14 , further comprising:

determining a quality metric associated with the reference signals based on the measurements of the reference signals.

16. The method of claim 12 , further comprising:

determining the coarse location based on measurements of reference signals transmitted by a plurality of TRPs.

17. The method of claim 16 , further comprising:

determining a quality metric associated with the reference signals based on the measurements of the reference signals.

18. The method of claim 1 , wherein:

the DOP threshold is received from a serving base station or a location server.

19. The method of claim 1 , wherein a set of TRPs among TRPs of the at least one set of TRPs are determined by a location server for future positioning sessions with the UE.

20. The method of claim 1 , wherein the DOP threshold comprises a geometric dilution of precision (GDOP) threshold, a horizontal dilution of precision (HDOP) threshold, a vertical dilution of precision (VDOP) threshold, a position dilution of precision (PDOP) threshold, a time dilution of precision (TDOP) threshold, or any combination thereof.

21. A user equipment (UE), comprising:

a memory;

at least one transceiver; and

at least one processor communicatively coupled to the memory and the at least one transceiver, the at least one processor configured to:

receive, via the at least one transceiver, a dilution of precision (DOP) threshold;

identify one or more sets of transmission-reception points (TRPs) from a plurality of K sets of M TRPs, wherein K is a number of sets of TRPs and M is a number of TRPs, and wherein the plurality of K sets of M TRPs is selected from all TRPs from which the UE can measure positioning reference signals (PRS) until a highest priority set of M TRPs that satisfies the DOP threshold is identified;

perform one or more positioning measurements of PRS transmitted by at least one set of TRPs of the one or more sets of TRPs, wherein at least the at least one set of TRPs of the one or more sets of TRPs satisfies the DOP threshold, and wherein the at least one set of TRPs is the highest priority set of M TRPs; and

report, via the at least one transceiver, the one or more positioning measurements or location information derived from the one or more positioning measurements.

22. The UE of claim 21 , wherein a number of TRPs in each of the one or more sets of TRPs is less than a threshold.

23. The UE of claim 22 , wherein the at least one processor is further configured to:

select the plurality of K sets of M TRPs from all TRPs from which the UE can measure PRS, wherein M is less than or equal to the threshold.

24. The UE of claim 23 , wherein the at least one processor is further configured to:

measure PRS from each TRP in each of the plurality of K sets of M TRPs to determine a DOP for each of the plurality of K sets of M TRPs.

25. The UE of claim 24 , wherein the at least one processor is further configured to:

assign a priority to each set of M TRPs of the plurality of K sets of M TRPs based on the DOP for the respective set of M TRPs.

26. The UE of claim 23 , wherein:

the plurality of K sets of M TRPs are selected until a smallest set of M TRPs that satisfies the DOP threshold is identified, and

the at least one set of TRPs is the smallest set of M TRPs.

27. The UE of claim 21 , wherein the at least one processor is further configured to:

transmit, via the at least one transceiver, a coarse location to a serving base station or a location server; and

receive, via the at least one transceiver, identifiers of the one or more sets of TRPs from the serving base station or the location server based on the coarse location of the UE.

28. A user equipment (UE), comprising:

means for receiving a dilution of precision (DOP) threshold;

means for identifying one or more sets of transmission-reception points (TRPs) from a plurality of K sets of M TRPs, wherein K is a number of sets of TRPs and M is a number of TRPs, and wherein the plurality of K sets of M TRPs is selected from all TRPs from which the UE can measure positioning reference signals (PRS) until a highest priority set of M TRPs that satisfies the DOP threshold is identified;

means for performing one or more positioning measurements of PRS transmitted by at least one set of TRPs of the one or more sets of TRPs, wherein at least the at least one set of TRPs of the one or more sets of TRPs satisfies the DOP threshold, and wherein the at least one set of TRPs is the highest priority set of M TRPs; and

means for reporting the one or more positioning measurements or location information derived from the one or more positioning measurements.

29. A non-transitory computer-readable medium storing computer-executable instructions that, when executed by a user equipment (UE), cause the UE to:

receive a dilution of precision (DOP) threshold;

identify one or more sets of transmission-reception points (TRPs) from a plurality of K sets of M TRPs, wherein K is a number of sets of TRPs and M is a number of TRPs, and wherein the plurality of K sets of M TRPs is selected from all TRPs from which the UE can measure positioning reference signals (PRS) until a highest priority set of M TRPs that satisfies the DOP threshold is identified;

perform one or more positioning measurements of PRS transmitted by at least one set of TRPs of the one or more sets of TRPs, wherein at least the at least one set of TRPs of the one or more sets of TRPs satisfies the DOP threshold, and wherein the at least one set of TRPs is the highest priority set of M TRPs; and

report the one or more positioning measurements or location information derived from the one or more positioning measurements.