Techniques for synchronizing based on sidelink synchronization signal prioritization

1. A method for wireless communications at a user equipment (UE), comprising:

receiving a first configuration from a first synchronization source, the first configuration comprising a first synchronization source identification associated with the first synchronization source;

receiving a second configuration from a second synchronization source, the second configuration comprising a second synchronization source identification associated with the second synchronization source,

identifying the first synchronization source identification and the second synchronization source identification are from a first set of synchronization source identifications associated with independent synchronization sources,

selecting the first synchronization source based at least in part on determining a first priority associated with the first synchronization source is higher than a second priority associated with the second synchronization source, wherein determining the first priority is higher than the second priority is based at least in part on a comparison of a value of the first synchronization source identification and a value of the second synchronization source identification; and

communicating with one or more devices using synchronization information associated with the selected first synchronization source as a synchronization reference.

2. The method of claim 1 , wherein determining the first priority is higher than the second priority is based at least in part on the value of the first synchronization source identification being lower than the value of the second synchronization source identification.

3. The method of claim 1 , wherein the first synchronization source identification has a same value as the second synchronization source identification, the method further comprising:

determining a first reference signal received power measurement for the first synchronization source and a second reference signal received power measurement for the second synchronization source, wherein the first synchronization source is selected based at least in part on the first reference signal received power measurement for the first synchronization source.

4. The method of claim 1 , wherein the first priority and the second priority are determined based at least in part on priority groups within the first set of synchronization source identifications associated with the independent synchronization sources.

5. The method of claim 4 , further comprising:

receiving, via radio resource control signaling, an indication of the priority groups.

6. The method of claim 1 , further comprising:

determining a first reference signal received power measurement for the first synchronization source and a second reference signal received power measurement for the second synchronization source, wherein the first synchronization source is selected based at least in part on the first reference signal received power measurement for the first synchronization source.

7. The method of claim 1 , further comprising:

receiving the second configuration from the second synchronization source;

identifying the second synchronization source identification has a higher priority than the first synchronization source identification; and

transitioning communications with the one or more devices from using the synchronization information associated with the selected first synchronization source to using synchronization information associated with the second synchronization source based at least in part on the higher priority of the second synchronization source identification.

8. The method of claim 1 , further comprising:

identifying a third synchronization source comprising a third synchronization source identification, the third synchronization source identification being from a second set of synchronization source identifications associated with a higher priority than the first set of synchronization source identifications; and

communicating with the one or more devices using synchronization information associated with the third synchronization source based at least in part on the second set of synchronization source identifications having the higher priority than the first set of synchronization source identifications.

9. The method of claim 8 , wherein the second set of synchronization source identifications are associated with a global navigation satellite system coverage.

10. The method of claim 1 , wherein the first synchronization source comprises a first UE and the second synchronization source comprises a second UE.

11. The method of claim 1 , wherein the communications with the one or more devices comprise sidelink communications, and the first configuration is received over a sidelink with the first synchronization source and the second synchronization configuration is received over a sidelink with the second synchronization source.

12. An apparatus for wireless communications at a user equipment (UE), comprising:

a processor,

memory coupled with the processor; and

instructions stored in the memory and executable by the processor to cause the apparatus to:

receive a first configuration from a first synchronization source, the first configuration comprising a first synchronization source identification associated with the first synchronization source;

receive a second configuration from a second synchronization source, the second configuration comprising a second synchronization source identification associated with the second synchronization source;

identify the first synchronization source identification and the second synchronization source identification are from a first set of synchronization source identifications associated with independent synchronization sources;

select the first synchronization source based at least in part on a first priority associated with the first synchronization source is higher than a second priority associated with the second synchronization source, wherein determining the first priority is higher than the second priority is based at least in part on a comparison of a value of the first synchronization source identification and a value of the second synchronization source identification; and

communicate with one or more devices using synchronization information associated with the selected first synchronization source as a synchronization reference.

13. The apparatus of claim 12 , wherein determining the first priority is higher than the second priority is based at least in part on the value of the first synchronization source identification being lower than the value of the second synchronization source identification.

14. The apparatus of claim 12 , wherein the first synchronization source identification has a same value as the second synchronization source identification, the instructions are further executable by the processor to cause the apparatus to:

determining a first reference signal received power measurement for the first synchronization source and a second reference signal received power measurement for the second synchronization source, wherein the first synchronization source is selected based at least in part on the first reference signal received power measurement for the first synchronization source.

15. The apparatus of claim 12 , wherein the first priority and the second priority are determined based at least in part on priority groups within the first set of synchronization source identifications associated with the independent synchronization sources.

16. The apparatus of claim 15 , wherein the instructions are further executable by the processor to cause the apparatus to:

receive, via radio resource control signaling, an indication of the priority groups.

17. The apparatus of claim 12 , wherein the instructions are further executable by the processor to cause the apparatus to:

determine a first reference signal received power measurement for the first synchronization source and a second reference signal received power measurement for the second synchronization source, wherein the first synchronization source is selected based at least in part on the first reference signal received power measurement for the first synchronization source.

18. The apparatus of claim 12 , wherein the instructions are further executable by the processor to cause the apparatus to:

receive the second configuration from the second synchronization source;

identify the second synchronization source identification has a higher priority than the first synchronization source identification; and

transition communications with the one or more devices from using the synchronization information associated with the selected first synchronization source to using synchronization information associated with the second synchronization source based at least in part on the higher priority of the second synchronization source identification.

19. The apparatus of claim 12 , wherein the instructions are further executable by the processor to cause the apparatus to:

identify a third synchronization source comprising a third synchronization source identification, the third synchronization source identification being from a second set of synchronization source identifications associated with a higher priority than the first set of synchronization source identifications; and

communicate with the one or more devices using synchronization information associated with the third synchronization source based at least in part on the second set of synchronization source identifications having the higher priority than the first set of synchronization source identifications.

20. The apparatus of claim 19 , wherein the second set of synchronization source identifications are associated with a global navigation satellite system coverage.

21. The apparatus of claim 12 , wherein the first synchronization source comprises a first UE and the second synchronization source comprises a second UE.

22. The apparatus of claim 12 , wherein the communications with the one or more devices comprise sidelink communications, and the first configuration is received over a sidelink with the first synchronization source and the second synchronization configuration is received over a sidelink with the second synchronization source.

23. An apparatus for wireless communications at a user equipment (UE), comprising:

means for receiving a first configuration from a first synchronization source, the first configuration comprising a first synchronization source identification associated with the first synchronization source;

means for receiving a second configuration from a second synchronization source, the second configuration comprising a second synchronization source identification associated with the second synchronization source;

means for identifying the first synchronization source identification and the second synchronization source identification are from a first set of synchronization source identifications associated with independent synchronization sources;

means for selecting the first synchronization source based at least in part on a first priority associated with the first synchronization source is higher than the second priority associated with the second synchronization source, wherein determining the first priority is higher than the second priority is based at least in part on a comparison of a value of the first synchronization source identification and a value of the second synchronization source identification; and

means for communicating with one or more devices using synchronization information associated with the selected first synchronization source as a synchronization reference.

24. The apparatus of claim 23 , wherein determining the first priority is higher than the second priority based at least in part on the value of the first synchronization source identification being lower than the value of the second synchronization source identification.

25. The apparatus of claim 23 , wherein the first synchronization source identification has a same value as the second synchronization source identification, the apparatus further comprising:

means for determining a first reference signal received power measurement for the first synchronization source and a second reference signal received power measurement for the second synchronization source, wherein the first synchronization source is selected based at least in part on the first reference signal received power measurement for the first synchronization source.

26. The apparatus of claim 23 , wherein the first priority and the second priority are determined based at least in part on priority groups within the first set of synchronization source identifications associated with the independent synchronization sources.

27. A non-transitory computer-readable medium storing code for wireless communications at a user equipment (UE), the code comprising instructions executable by a processor to:

receive a first configuration from a first synchronization source, the first configuration comprising a first synchronization source identification associated with the first synchronization source;

receive a second configuration from a second synchronization source, the second configuration comprising a second synchronization source identification associated with the second synchronization source;

identify the first synchronization source identification and the second synchronization source identification are from a first set of synchronization source identifications associated with independent synchronization sources;

select the first synchronization source based at least in part on determining a first priority associated with the first synchronization source is higher than the second priority associated with the second synchronization source, wherein determining the first priority is higher than the second priority is based at least in part on a comparison of a value of the first synchronization source identification and a value of the second synchronization source identification; and

communicate with one or more devices using synchronization information associated with the selected first synchronization source as a synchronization reference.

28. The method of claim 1 , wherein the independent synchronization sources associated with the first set of synchronization source identifications comprise synchronization sources out of a global navigation satellite system coverage, not connected to a base station, independent of the synchronization reference, or a combination thereof.

29. The apparatus of claim 12 , wherein the independent synchronization sources associated with the first set of synchronization source identifications comprise synchronization sources out of a global navigation satellite system coverage, not connected to a base station, independent of the synchronization reference, or a combination thereof.

30. The apparatus of claim 23 , wherein the independent synchronization sources associated with the first set of synchronization source identifications comprise synchronization sources out of a global navigation satellite system coverage, not connected to a base station, independent of the synchronization reference, or a combination thereof.