Application time for non-serving cell reference signal update
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a base station, an indication of an update associated with a non-serving cell reference signal. The UE may select a first application time duration based at least in part on a determination that the non-serving cell reference signal has been tracked by the UE or a second application time duration based at least in part on a determination that the non-serving cell reference signal has not been tracked by the UE, resulting in a selected application time duration. The UE may apply the update associated with the non-serving cell reference signal after the selected application time duration. Numerous other aspects are described.
1. A user equipment (UE) for wireless communication, comprising:
one or more memories;
one or more processors, coupled to the one or more memories, configured to:
receive an indication of an update associated with a non-serving cell reference signal of a non-serving cell, wherein the indication includes a beam indication to use a transmission configuration indicator (TCI) state associated with the non-serving cell reference signal for receiving at least one of a scheduled aperiodic reference signal or a scheduled physical downlink shared channel (PDSCH) communication;
apply the update associated with the non-serving cell reference signal after an application time duration selected from a first application time duration and a second application time duration,
wherein the first application time duration is selected based at least in part on the non-serving cell reference signal being tracked by the UE based at least in part on the UE measuring the non-serving cell reference signal, and
wherein the second application time duration is selected based at least in part on the non-serving cell reference signal not being tracked by the UE; and
receive, after the application time duration, the at least one of the scheduled aperiodic reference signal or the scheduled PDSCH communication using the TCI state associated with the non-serving cell reference signal.
2. The UE of claim 1 , wherein the application time duration is based at least in part on a time at which the UE receives the indication.
3. The UE of claim 1 , wherein the one or more processors are further configured to:
transmit an acknowledgment based at least in part on receiving the indication, wherein the application time duration is based at least in part on a time at which the UE transmits the acknowledgment.
4. The UE of claim 1 , wherein whether the non-serving cell reference signal has been tracked by the UE is based at least in part on whether the UE has been configured to monitor the non-serving cell reference signal for inter-cell mobility measurements.
5. The UE of claim 1 , wherein whether the non-serving cell reference signal has been tracked by the UE is based at least in part on a reference signal being configured for measurement by the UE on the TCI state associated with the non-serving cell reference signal.
6. The UE of claim 1 , wherein the second application time duration is longer than the first application time duration.
7. The UE of claim 6 , wherein the second application time duration includes at least a time duration associated with a frequency.
8. A network entity for wireless communication, comprising:
one or more memories;
one or more processors, coupled to the one or more memories, configured to:
transmit an indication of an update associated with a non-serving cell reference signal of a non-serving cell, wherein the indication includes a beam indication to use a transmission configuration indicator (TCI) state associated with the non-serving cell reference signal for receiving at least one of a scheduled aperiodic reference signal or a scheduled physical downlink shared channel (PDSCH) communication; and
transmit, after an application time duration, the at least one of the scheduled aperiodic reference signal or the scheduled PDSCH communication using the TCI state associated with the non-serving cell reference signal,
wherein the update associated with the non-serving cell reference signal is applied after the application time duration,
wherein the application time duration is selected from a first application time duration and a second application time duration,
wherein the first application time duration is selected based at least in part on the non-serving cell reference signal being tracked by a user equipment (UE) based at least in part on the UE measuring the non-serving cell reference signal, and
wherein the second application time duration is selected based at least in part on the non-serving cell reference signal not being tracked by the UE.
9. The network entity of claim 8 , wherein the application time duration is based at least in part on a time at which the indication is transmitted.
10. The network entity of claim 8 , wherein the one or more processors are further configured to:
receive an acknowledgment based at least in part on transmitting the indication, wherein the application time duration is based at least in part on a time associated with receiving the acknowledgment.
11. The network entity of claim 8 , wherein whether the non-serving cell reference signal has been tracked by the UE is based at least in part on whether the UE has been configured to monitor the non-serving cell reference signal for inter-cell mobility measurements.
12. The network entity of claim 8 , wherein whether the non-serving cell reference signal has been tracked by the UE is based at least in part on a reference signal being configured for measurement by the UE on the TCI state associated with the non-serving cell reference signal.
13. The network entity of claim 8 , wherein the second application time duration is longer than the first application time duration.
14. The network entity of claim 13 , wherein the second application time duration includes at least a time duration associated with a frequency.
15. A method of wireless communication performed by a user equipment (UE), comprising:
receiving an indication of an update associated with a non-serving cell reference signal of a non-serving cell, wherein the indication includes a beam indication to use a transmission configuration indicator (TCI) state associated with the non-serving cell reference signal for receiving at least one of a scheduled aperiodic reference signal or a scheduled physical downlink shared channel (PDSCH) communication;
applying the update associated with the non-serving cell reference signal after an application time duration selected from a first application time duration and a second application time duration,
wherein the first application time duration is selected based at least in part on the non-serving cell reference signal being tracked by the UE based at least in part on the UE measuring the non-serving cell reference signal, and
wherein the second application time duration is selected based at least in part on the non-serving cell reference signal not being tracked by the UE; and
receiving, after the application time duration, the at least one of the scheduled aperiodic reference signal or the scheduled PDSCH communication using the TCI state associated with the non-serving cell reference signal.
16. The method of claim 15 , wherein the application time duration is based at least in part on a time at which the UE receives the indication.
17. The method of claim 15 , further comprising:
transmitting an acknowledgment based at least in part on receiving the indication, wherein the application time duration is based at least in part on a time at which the UE transmits the acknowledgment.
18. The method of claim 15 , wherein whether the non-serving cell reference signal has been tracked by the UE is based at least in part on a reference signal being configured for measurement by the UE on the TCI state associated with the non-serving cell reference signal.
19. The method of claim 15 , wherein the second application time duration is longer than the first application time duration.
20. The method of claim 19 , wherein the second application time duration includes at least a time duration associated with a frequency.