Interaction of positioning and media access control procedures
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may determine its position based on one or more position reference signals (PRSs), which the UE receives via different component carriers (CCs). The UE may maintain an active state with a first CC transmitting a PRS, while activating and deactivating a secondary CC that may transmit PRSs based on a periodic interval. Additionally, the UE may apply similar techniques for inactive BWPs where a PRS spans multiple BWPs. In some implementations, the position of the UE may enhance a UE mobility procedure based on determining a resource to use for the UE mobility procedure that is dependent upon the position of the UE. For example, the UE mobility procedure may include a random access procedure or a handover procedure. Additionally, the resources used for the mobility procedures may be quasi co-located with PRSs.
1. A method for wireless communication at a user equipment (UE), comprising:
communicating on a first set of frequency resources that are in an active state for the UE;
identifying a periodic interval associated with a second set of frequency resources, wherein the second set of frequency resources are in an inactive state for data communications for the UE, the periodic interval comprising a first time window during which the second set of frequency resources are activated for positioning reference signal monitoring and a second time window during which the second set of frequency resources are inactive for data communications and for positioning reference signal monitoring; and
receiving, during the first time window of the periodic interval, a first positioning reference signal on the first set of frequency resources and a second positioning reference signal on the second set of frequency resources.
2. The method of claim 1 , further comprising receiving a configuration indicating the periodic interval, wherein the periodic interval is identified based on the received configuration.
3. The method of claim 1 , further comprising receiving, on the second set of frequency resources, control channel signaling during the first time window.
4. The method of claim 3 , wherein the second positioning reference signal and the control channel signaling are received during a same set of one or more symbol periods.
5. The method of claim 3 , wherein the second positioning reference signal is received in a first set of one or more symbol periods and the control channel signaling is received in a second set of one or more symbol periods adjacent to the first set of one or more symbol periods.
6. The method of claim 1 , wherein communicating on the first set of frequency resources comprises communicating on the first set of frequency resources based on a configuration that includes the first set of frequency resources, and excludes the second set of frequency resources.
7. The method of claim 1 , wherein:
the first set of frequency resources comprise a first component carrier; and
the second set of frequency resources comprise a second component carrier different than the first component carrier.
8. The method of claim 1 , wherein:
the first set of frequency resources comprise a first bandwidth part; and
the second set of frequency resources comprise a second bandwidth part different than the first bandwidth part.
9. The method of claim 1 , further comprising maintaining an inactivity timer indicating the inactive state of the second set of frequency resources for the UE during the second time window while communicating on the first set of frequency resources that are in the active state for the UE during the second time window.
10. The method of claim 1 , wherein receiving the first positioning reference signal and the second positioning reference signal comprises receiving, during the first time window of the periodic interval, the first positioning reference signal from a first network device on the first set of frequency resources and the second positioning reference signal from a second network device on the second set of frequency resources.
11. The method of claim 1 , wherein receiving the first positioning reference signal and the second positioning reference signal comprises receiving, during the first time window of the periodic interval, the first positioning reference signal from a network device on the first set of frequency resources and the second positioning reference signal from the network device on the second set of frequency resources.
12. An apparatus for wireless communication at a user equipment (UE), comprising:
a processor,
memory in electronic communication with the processor; and
instructions stored in the memory and executable by the processor to cause the apparatus to:
communicate on a first set of frequency resources that are in an active state for the UE;
identify a periodic interval associated with a second set of frequency resources, wherein the second set of frequency resources are in an inactive state for data communications for the UE, the periodic interval comprising a first time window during which the second set of frequency resources are activated for positioning reference signal monitoring and a second time window during which the second set of frequency resources are inactive for data communications and for positioning reference signal monitoring; and
receive, during the first time window of the periodic interval, a first positioning reference signal on the first set of frequency resources and a second positioning reference signal on the second set of frequency resources.
13. The apparatus of claim 12 , wherein the instructions are further executable by the processor to cause the apparatus to receive a configuration indicating the periodic interval, wherein the periodic interval is identified based on the received configuration.
14. The apparatus of claim 12 , wherein the instructions are further executable by the processor to cause the apparatus to receive, on the second set of frequency resources, control channel signaling during the first time window.
15. The apparatus of claim 14 , wherein the second positioning reference signal and the control channel signaling are received during a same set of one or more symbol periods.
16. The apparatus of claim 14 , wherein the second positioning reference signal is received in a first set of one or more symbol periods and the control channel signaling is received in a second set of one or more symbol periods adjacent to the first set of one or more symbol periods.
17. The apparatus of claim 12 , wherein the instructions to communicate on the first set of frequency resources are executable by the processor to cause the apparatus to communicate on the first set of frequency resources based on a configuration that includes the first set of frequency resources and excludes the second set of frequency resources.
18. The apparatus of claim 12 , wherein:
the first set of frequency resources comprise a first component carrier; and
the second set of frequency resources comprise a second component carrier different than the first component carrier.
19. The apparatus of claim 12 , wherein:
the first set of frequency resources comprise a first bandwidth part; and
the second set of frequency resources comprise a second bandwidth part different than the first bandwidth part.
20. The apparatus of claim 12 , wherein the instructions are further executable by the processor to cause the apparatus to maintain an inactivity timer indicating the inactive state of the second set of frequency resources for the UE during the second time window while communicating on the first set of frequency resources that are in the active state for the UE during the second time window.
21. The apparatus of claim 12 , wherein the instructions to receive the first positioning reference signal and the second positioning reference signal are executable by the processor to cause the apparatus to receive, during the first time window of the periodic interval, the first positioning reference signal from a first network device on the first set of frequency resources and the second positioning reference signal from a second network device on the second set of frequency resources.
22. The apparatus of claim 12 , wherein the instructions to receive the first positioning reference signal and the second positioning reference signal are executable by the processor to cause the apparatus to receive, during the first time window of the periodic interval, the first positioning reference signal from a network device on the first set of frequency resources and the second positioning reference signal from the network device on the second set of frequency resources.
23. An apparatus for wireless communication at a user equipment (UE), comprising:
means for communicating on a first set of frequency resources that are in an active state for the UE;
means for identifying a periodic interval associated with a second set of frequency resources, wherein the second set of frequency resources are in an inactive state for data communications for the UE, the periodic interval comprising a first time window during which the second set of frequency resources are activated for positioning reference signal monitoring and a second time window during which the second set of frequency resources are inactive for data communications and for positioning reference signal monitoring; and
means for receiving, during the first time window of the periodic interval, a first positioning reference signal on the first set of frequency resources and a second positioning reference signal on the second set of frequency resources.
24. The apparatus of claim 23 , further comprising means for receiving a configuration indicating the periodic interval, wherein the periodic interval is identified based on the received configuration.
25. The apparatus of claim 23 , further comprising means for receiving, on the second set of frequency resources, control channel signaling during the first time window.
26. The apparatus of claim 23 , wherein the means for communicating on the first set of frequency resources are based on a configuration that includes the first set of frequency resources, and excludes the second set of frequency resources.
27. The apparatus of claim 23 , further comprising means for maintaining an inactivity timer indicating the inactive state of the second set of frequency resources for the UE during the second time window while communicating on the first set of frequency resources that are in the active state for the UE during the second time window.
28. The apparatus of claim 23 , wherein the means for receiving the first positioning reference signal and the second positioning reference signal comprise means for receiving, during the first time window of the periodic interval, the first positioning reference signal from a first network device on the first set of frequency resources and the second positioning reference signal from a second network device on the second set of frequency resources.
29. The apparatus of claim 23 , wherein the means for receiving the first positioning reference signal and the second positioning reference signal comprise means for receiving, during the first time window of the periodic interval, the first positioning reference signal from a network device on the first set of frequency resources and the second positioning reference signal from the network device the second set of frequency resources.
30. A non-transitory computer-readable medium storing code for wireless communication at a user equipment (UE), the code comprising instructions executable by a processor to:
communicate on a first set of frequency resources that are in an active state for the UE;
identify a periodic interval associated with a second set of frequency resources, wherein the second set of frequency resources are in an inactive state for data communications for the UE, the periodic interval comprising a first time window during which the second set of frequency resources are activated for positioning reference signal monitoring and a second time window during which the second set of frequency resources are inactive for data communications and for positioning reference signal monitoring; and
receive, during the first time window of the periodic interval, a first positioning reference signal on the first set of frequency resources and a second positioning reference signal on the second set of frequency resources.
31. The method of claim 1 , further comprising:
determining a position of the UE based at least in part on the received first positioning reference signal and the received second positioning reference signal.
32. The apparatus of claim 12 , wherein the instructions are further executable by the processor to cause the apparatus to determine a position of the UE based at least in part on the received first positioning reference signal and the received second positioning reference signal.
33. The apparatus of claim 23 , further comprising means for determining a position of the UE based at least in part on the received first positioning reference signal and the received second positioning reference signal.
34. The non-transitory computer-readable medium of claim 30 , wherein the code further comprises instructions executable by the processor to:
determine a position of the UE based at least in part on the received first positioning reference signal and the received second positioning reference signal.