Collision handling for semi-persistent scheduling signals
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a base station may identify a collision between a first resource for a downlink semi-persistent scheduled communication and a second resource for another downlink signal; and perform an action to mitigate the collision based at least in part on identifying the collision. In some aspects, a user equipment (UE) may identify a collision between a first resource for a downlink semi-persistently scheduled (SPS) communication and a second resource for another downlink signal; and determine an action, to be performed by a base station, to mitigate the collision based at least in part on identifying the collision; and selectively receive the downlink SPS communication or the other downlink signal based at least in part on the determination. Numerous other aspects are provided.
1. A method of wireless communication performed by a user equipment (UE), comprising:
identifying a collision between a first resource for a downlink semi-persistently scheduled (SPS) communication and a second resource for another downlink signal;
determining an action, to be performed by a base station, to mitigate the collision based at least in part on identifying the collision,
wherein the action comprises at least one of:
moving a demodulation reference signal of the downlink SPS communication to a third resource that is a next sequential resource after the second resource and that does not overlap the second resource, or
canceling a transmission of the downlink SPS communication based at least in part on a threshold associated with a ratio of overlapping resources, an effective rate of the downlink SPS communication, or a limited resource availability for the demodulation reference signal of the downlink SPS communication; and
selectively receiving the downlink SPS communication or the other downlink signal based at least in part on the determination.
2. The method of claim 1 , wherein the first resource is for the demodulation reference signal of the downlink SPS communication.
3. The method of claim 1 , further comprising:
transmitting a negative acknowledgment for the downlink SPS communication.
4. The method of claim 1 , wherein the action comprises canceling the transmission of the downlink SPS communication.
5. The method of claim 4 , wherein canceling the transmission of the downlink SPS communication is based at least in part on the threshold associated with the ratio of overlapping resources or the effective rate of the downlink SPS communication.
6. The method of claim 1 , wherein canceling the transmission of the downlink SPS communication is based at least in part on the limited resource availability.
7. The method of claim 1 , wherein the action comprises the moving the demodulation reference signal of the downlink SPS communication.
8. The method of claim 1 , wherein the other downlink signal is associated with at least one of:
a synchronization signal block,
a rate-matched resource set,
a resource element-level reserved resource, or
a channel state information reference signal.
9. The method of claim 1 , wherein the first resource is associated with a first pattern, and wherein the third resource is associated with a second pattern.
10. The method of claim 1 , wherein the action further comprises at least one of:
rate matching a data portion of the downlink SPS communication around an overlapping resource of the first resource and the second resource, or
puncturing the data portion of the downlink SPS communication on the overlapping resource.
11. The method of claim 1 , wherein the first resource and the second resource are associated with a same symbol, and wherein the downlink SPS communication and the other downlink signal are associated with different spatial quasi-collocation configurations.
12. The method of claim 11 , further comprising:
identifying the first resource as unavailable for a downlink data channel based at least in part on the collision.
13. The method of claim 1 , wherein the action is based at least in part on a priority rule associated with the downlink SPS communication and the other downlink signal.
14. The method of claim 1 , wherein the action is based at least in part on a capability of a recipient of the downlink SPS communication relating to contemporaneous reception of multiple spatial beams.
15. The method of claim 14 , wherein the collision is between the downlink SPS communication and multiple other downlink signals including the other downlink signal, and wherein the action further comprises selecting a subset of the downlink SPS communication and the multiple other downlink signals for transmission based at least in part on the capability.
16. The method of claim 1 , wherein the action is based at least in part on whether a network associated with the UE is configured to perform contemporaneous transmission of multiple spatial beams for the downlink SPS communication and the other downlink signal.
17. The method of claim 1 , wherein the action comprises moving the demodulation reference signal and canceling the transmission of the downlink SPS communication.
18. A method of wireless communication performed by a base station, comprising:
identifying a collision between a first resource for a downlink semi-persistently scheduled (SPS) communication and a second resource for another downlink signal; and
performing an action to mitigate the collision based at least in part on identifying the collision,
wherein performing the action comprises at least one of:
moving a demodulation reference signal of the downlink SPS communication to a third resource that is a next sequential resource after the second resource and that does not overlap the second resource, or
canceling a transmission of the downlink SPS communication based at least in part on a threshold associated with a ratio of overlapping resources, an effective rate of the downlink SPS communication, or a limited resource availability for the demodulation reference signal of the downlink SPS communication.
19. The method of claim 18 , wherein the first resource is for the demodulation reference signal of the downlink SPS communication.
20. The method of claim 18 , wherein performing the action comprises canceling the transmission of the downlink SPS communication.
21. The method of claim 18 , wherein canceling the transmission of the downlink SPS communication is based at least in part on the limited resource availability.
22. The method of claim 18 , wherein performing the action comprises moving the demodulation reference signal of the downlink SPS communication.
23. The method of claim 18 , wherein the other downlink signal is associated with at least one of:
a synchronization signal block,
a rate-matched resource set,
a resource element-level reserved resource, or
a channel state information reference signal.
24. The method of claim 18 , wherein the first resource is associated with a first pattern, and wherein the third resource is associated with a second pattern.
25. The method of claim 18 , wherein performing the action further comprises:
rate matching a data portion of the downlink SPS communication around an overlapping resource of the first resource and the second resource, or
puncturing the data portion of the downlink SPS communication on the overlapping resource.
26. The method of claim 18 , wherein the first resource and the second resource are associated with a same symbol, and wherein the downlink SPS communication and the other downlink signal are associated with different spatial quasi-collocation configurations.
27. The method of claim 18 , wherein the action is based at least in part on whether a network associated with the base station is configured to perform contemporaneous transmission of multiple spatial beams for the downlink SPS communication and the other downlink signal.
28. The method of claim 18 , wherein performing the action comprises moving the demodulation reference signal and canceling the transmission of the downlink SPS communication.
29. A user equipment (UE) for wireless communication, comprising:
a memory; and
one or more processors coupled to the memory, the memory and the one or more processors configured to:
identify a collision between a first resource for a downlink semi-persistently scheduled (SPS) communication and a second resource for another downlink signal;
determine an action, to be performed by a base station, to mitigate the collision based at least in part on identifying the collision,
wherein the action comprises at least one of:
moving a demodulation reference signal of the downlink SPS communication to a third resource that is a next sequential resource after the second resource and that does not overlap the second resource, or
canceling a transmission of the downlink SPS communication based at least in part on a threshold associated with a ratio of overlapping resources, an effective rate of the downlink SPS communication, or a limited resource availability for the demodulation reference signal of the downlink SPS communication; and
selectively receive the downlink SPS communication or the other downlink signal based at least in part on the determination.
30. A base station for wireless communication, comprising:
a memory; and
one or more processors coupled to the memory, the memory and the one or more processors configured to:
identify a collision between a first resource for a downlink semi-persistent scheduled (SPS) communication and a second resource for another downlink signal; and
perform an action to mitigate the collision based at least in part on identifying the collision,
wherein the action comprises at least one of:
moving a demodulation reference signal of the downlink SPS communication to a third resource that is a next sequential resource after the second resource and that does not overlap the second resource, or
canceling a transmission of the downlink SPS communication based at least in part on a threshold associated with a ratio of overlapping resources, an effective rate of the downlink SPS communication, or a limited resource availability for the demodulation reference signal of the downlink SPS communication.