Semi-persistent scheduling for broadcast or multicast
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive information identifying a semi-persistent scheduling (SPS) configuration for a broadcast or multicast (broadcast/multicast) communication. The UE may receive the broadcast/multicast communication in accordance with the SPS configuration. Numerous other aspects are provided.
1. A method of wireless communication performed by a user equipment (UE), comprising:
receiving information identifying a semi-persistent scheduling (SPS) configuration for a broadcast or multicast (broadcast/multicast) communication, wherein the SPS configuration indicates a precoding matrix index of the broadcast/multicast communication;
receiving signaling regarding the SPS configuration, wherein the signaling indicates to activate, deactivate, or reconfigure the broadcast/multicast communication, and wherein the signaling is scrambled; and
receiving the broadcast/multicast communication in accordance with the SPS configuration.
2. The method of claim 1 , wherein the SPS configuration is cell-specific.
3. The method of claim 1 , wherein the UE is associated with a cell, and wherein the SPS configuration is used for UEs of the cell.
4. The method of claim 1 , wherein the SPS configuration further indicates at least one of:
a periodicity of the broadcast/multicast communication,
a modulation and coding scheme of the broadcast/multicast communication, or
a number of hybrid automatic repeat request processes of the broadcast/multicast communication.
5. The method of claim 1 , wherein the SPS configuration further indicates a resource or a beam for at least one of:
the broadcast/multicast communication, or
an acknowledgment or a negative acknowledgment for the broadcast/multicast communication.
6. The method of claim 1 , wherein the SPS configuration further indicates a common downlink control information (DCI) or media access control (MAC) control element (CE) for activation, deactivation, reconfiguration, or retransmission of the broadcast/multicast communication.
7. The method of claim 6 , wherein the SPS configuration further indicates a common radio network temporary identifier (RNTI) to be used to scramble the common DCI.
8. The method of claim 6 , wherein the SPS configuration further indicates a common control resource set or a search space for the common DCI.
9. The method of claim 1 ,
wherein the signaling is broadcast/multicast signaling, and
wherein the broadcast/multicast signaling is scrambled using a radio network temporary identifier associated with a group of UEs that includes the UE.
10. The method of claim 1 , further comprising:
transmitting an acknowledgment (ACK) or a negative ACK (NACK) for the broadcast/multicast communication, wherein the ACK or the NACK uses a same physical sequence for each UE of a group of UEs that includes the UE.
11. The method of claim 1 , wherein the SPS configuration identifies an uplink feedback configuration that is cell-specific.
12. The method of claim 1 , wherein the SPS configuration is UE-specific.
13. The method of claim 1 , wherein the SPS configuration for multiple UEs uses a same downlink reception parameter for the multiple UEs.
14. The method of claim 1 , wherein the SPS configuration identifies an uplink feedback configuration that is UE-specific.
15. The method of claim 1 ,
wherein the signaling is unicast signaling, and
wherein the unicast signaling is scrambled using a dedicated radio network temporary identifier of the UE.
16. A method of wireless communication performed by a base station (BS), comprising:
transmitting, to a user equipment (UE), information identifying a semi-persistent scheduling (SPS) configuration for a broadcast or multicast (broadcast/multicast) communication, wherein the SPS configuration indicates a precoding matrix index of the broadcast/multicast communication;
transmitting signaling regarding the SPS configuration, wherein the signaling indicates to activate, deactivate, or reconfigure the broadcast/multicast communication, and wherein the signaling is scrambled; and
transmitting the broadcast/multicast communication in accordance with the SPS configuration.
17. The method of claim 16 , wherein the SPS configuration is cell-specific.
18. The method of claim 16 , wherein the SPS configuration indicates at least one of:
a periodicity of the broadcast/multicast communication,
a modulation and coding scheme of the broadcast/multicast communication, or
a number of hybrid automatic repeat request processes of the broadcast/multicast communication.
19. The method of claim 16 , wherein the SPS configuration further indicates a resource or a beam for at least one of:
the broadcast/multicast communication, or
an acknowledgment or a negative acknowledgment for the broadcast/multicast communication.
20. The method of claim 16 , wherein the SPS configuration further indicates a common downlink control information (DCI) or media access control (MAC) control element (CE) for activation, deactivation, reconfiguration, or retransmission of the broadcast/multicast communication.
21. The method of claim 20 , wherein the SPS configuration further indicates a common radio network temporary identifier (RNTI) to be used to scramble the common DCI.
22. The method of claim 20 , wherein the SPS configuration further indicates a common control resource set or a common search space for the common DCI.
23. The method of claim 16 ,
wherein the signaling broadcast/multicast signaling, and
wherein the broadcast/multicast signaling is scrambled using a radio network temporary identifier associated with a group of UEs that includes the UE.
24. The method of claim 16 , further comprising:
receiving feedback regarding the broadcast/multicast communication; and
retransmitting the broadcast/multicast communication based at least in part on the feedback.
25. The method of claim 24 , wherein the feedback is received on a common resource for a group of UEs that includes the UE.
26. The method of claim 24 , wherein the feedback is received on a resource specific to the UE.
27. The method of claim 24 , wherein the feedback uses a same physical sequence for each UE of a group of UEs that includes the UE.
28. The method of claim 24 , wherein the broadcast/multicast communication is retransmitted in a next SPS allocation.
29. The method of claim 24 , wherein the feedback includes negative feedback from one or more UEs, and wherein the broadcast/multicast communication is retransmitted for the one or more UEs using a dynamically scheduled resource that is scheduled using dedicated downlink control information.
30. The method of claim 16 , wherein the SPS configuration for multiple UEs uses a same downlink reception parameter for the multiple UEs.