Group-common dynamic indication of physical uplink control channel repetition factor
Aspects presented herein may enable a network entity, such as a base station or a component of a base station, to indicate a PUCCH repetition factor to a set of UEs via group-common DCI. In one aspect, a network entity transmits, to a set of UEs, an indication associated with a number of PUCCH retransmissions via group-common DCI. The network entity receives, from one or more UEs in the set of UEs, one or more PUCCH retransmissions based on the transmitted indication. In another aspect, a UE receives, from a network entity, an indication associated with a number of PUCCH retransmissions via group-common DCI. The UE transmits, to the network entity, one or more PUCCH retransmissions based on the received indication.
1. An apparatus for wireless communication at a network entity, comprising:
memory; and
at least one processor coupled to the memory and configured to:
transmit, to a set of user equipments (UEs), an indication associated with a number of physical uplink control channel (PUCCH) retransmissions via group-common downlink control information (DCI), wherein the indication is an index that corresponds to one of multiple configured values of PUCCH retransmissions at each of one or more UEs in the set of UEs; and
receive, from the one or more UEs in the set of UEs, a configured value of PUCCH retransmissions based on the index.
2. The apparatus of claim 1 , wherein the at least one processor and the memory are further configured to:
transmit, to the set of UEs, a configuration for a set of PUCCH resources for each UE in the set of UEs, wherein the network entity receives the configured value of PUCCH retransmissions from the one or more UEs based on the set of PUCCH resources configured for each UE in the set of UEs.
3. The apparatus of claim 1 , wherein the configured value is one of the multiple configured values of PUCCH retransmissions.
4. The apparatus of claim 1 , wherein the configured values of PUCCH retransmissions for at least two of the one or more UEs are different.
5. The apparatus of claim 1 , wherein the at least one processor and the memory are further configured to:
determine a channel quality for at least one uplink channel associated with each UE in the set of UEs; and
determine, based on the channel quality for the at least one uplink channel, a value for the index.
6. The apparatus of claim 5 , wherein the channel quality is determined based on channel measurement feedback received from at least one UE of the set of UEs or based on a channel history of at least one of the at least one uplink channel.
7. The apparatus of claim 1 , wherein the indication applies to PUCCH retransmissions that include uplink control information (UCI).
8. The apparatus of claim 7 , wherein the indication applies to the PUCCH retransmissions that include the UCI carrying channel state information (CSI) feedback.
9. The apparatus of claim 1 , wherein the indication applies to PUCCH retransmissions using one or more PUCCH formats, or to PUCCH retransmissions using a short PUCCH format of the one or more PUCCH formats.
10. The apparatus of claim 1 , wherein the indication applies to PUCCH retransmissions based on at least one of subcarrier spacing, frequency range, carrier frequency, or a bandwidth part (BWP) associated with the PUCCH retransmissions.
11. The apparatus of claim 1 , wherein the at least one processor and the memory are further configured to:
configure a restriction for each UE in the set of UEs for each UE to determine whether to transmit PUCCH retransmissions based on the indication.
12. The apparatus of claim 11 , wherein the restriction is configured for each UE of the set of UEs via radio resource control (RRC) signaling.
13. The apparatus of claim 11 , wherein the restriction is associated with uplink control information (UCI) or with one or more PUCCH formats for the PUCCH retransmissions.
14. The apparatus of claim 11 , wherein the restriction is associated with at least one of subcarrier spacing, frequency range, carrier frequency, or a bandwidth part (BWP) for the PUCCH retransmissions.
15. A method of wireless communication at a network entity, comprising:
transmitting, to a set of user equipments (UEs), an indication associated with a number of physical uplink control channel (PUCCH) retransmissions via group-common downlink control information (DCI), wherein the indication is an index that corresponds to one of multiple configured values for PUCCH retransmissions at each of one or more UEs in the set of UEs; and
receiving, from the one or more UEs in the set of UEs, one or more PUCCH retransmissions based on the index.
16. An apparatus for wireless communication at a user equipment (UE), comprising:
memory; and
at least one processor coupled to the memory and configured to:
receive, from a network entity, an indication associated with a number of physical uplink control channel (PUCCH) retransmissions via a group-common downlink control information (DCI), wherein the indication is an index that corresponds to one of multiple configured values for PUCCH retransmissions at the UE; and
transmit, to the network entity, a configured value of the PUCCH retransmissions based on the index.
17. The apparatus of claim 16 , wherein the at least one processor and the memory are further configured to:
receive, from the network entity, a configuration for a set of PUCCH resources, wherein the UE transmits the configured value of PUCCH retransmissions based on the set of PUCCH resources.
18. The apparatus of claim 16 , wherein the configured value is one of the multiple configured values for the PUCCH retransmissions.
19. The apparatus of claim 16 , wherein the multiple configured values for PUCCH retransmissions are determined based on at least one of: uplink control information (UCI) size, PUCCH format, UCI content, or PUCCH resource set.
20. The apparatus of claim 16 , wherein the at least one processor and the memory are further configured to:
determine whether to apply PUCCH retransmissions.
21. The apparatus of claim 20 , wherein the determination of whether to apply PUCCH retransmissions is based on whether the PUCCH retransmissions include uplink control information (UCI) or UCI carrying CSI feedback.
22. The apparatus of claim 20 , wherein the determination of whether to apply PUCCH retransmissions is based on a PUCCH format for the PUCCH retransmissions.
23. The apparatus of claim 20 , wherein the determination of whether to apply PUCCH retransmissions is based on at least one of subcarrier spacing, frequency range, carrier frequency, or a bandwidth part (BWP) associated with the PUCCH retransmissions.
24. The apparatus of claim 20 , wherein the determination of whether to apply PUCCH retransmissions is based on a restriction configured by the network entity.
25. The apparatus of claim 24 , wherein the restriction is configured by the network entity via radio resource control (RRC) signaling.
26. The apparatus of claim 24 , wherein the restriction is associated with uplink control information (UCI) or is associated with one or more PUCCH formats for the PUCCH retransmission.
27. The apparatus of claim 24 , wherein the restriction is associated with at least one of subcarrier spacing, frequency range, carrier frequency, or a bandwidth part (BWP) for the PUCCH retransmissions.
28. A method of wireless communication at a user equipment (UE), comprising:
receiving, from a network entity, an indication associated with a number of physical uplink control channel (PUCCH) retransmissions via a group-common downlink control information (DCI), wherein the indication is an index that corresponds to one of multiple configured values for PUCCH retransmissions at the UE; and
transmitting, to the network entity, a configured value of the PUCCH retransmissions based on the index.