URLLC physical uplink control channel (PUCCH) configuration with sub-slot structure

1. A user equipment (UE), comprising:

one or more non-transitory computer-readable media storing one or more computer-executable instructions; and

at least one processor coupled to the one or more non-transitory computer-readable media and configured to execute the one or more computer-executable instructions to cause the UE to:

receive, from a base station (BS), a configuration to configure a sub-slot structure in a slot for a plurality of physical uplink control channel (PUCCH) resources for Hybrid Automatic Repeat Request-ACKnowledgement (HARQ-ACK) feedback in response to at least one physical downlink shared channel (PDSCH) for ultra-reliable low-latency communication (URLLC); and

transmit the HARQ-ACK feedback in response to the at least one PDSCH for URLLC based on the configured sub-slot structure in the slot, wherein:

the plurality of PUCCH resources are confined within a sub-slot, and

each of PUCCH resource allocations for the plurality of PUCCH resources is confined within the sub-slot based on the configured sub-slot structure.

2. The UE of claim 1 , wherein the sub-slot structure comprises a 2-symbol structure, a 3and 4-symbol structure or a 7-symbol structure.

3. The UE of claim 1 , wherein the UE is configured with higher layer signaling for the sub-slot structure for PUCCH allocation.

4. The UE of claim 1 , wherein:

the UE is configured with a subset of sub-slots in the sub-slot structure, and

the plurality of PUCCH resources are configured within the sub-slots in the subset of the sub-slot structure.

5. The UE of claim 1 , wherein the UE is configured with a plurality of subsets of sub-slots in the sub-slot structure for PUCCH resource allocation.

6. The UE of claim 5 , wherein the plurality of subsets of sub-slots in the sub-slot structure are specified, and the UE is configured, by higher layer signaling via the subset of sub-slots in the sub-slot structure.

7. The UE of claim 1 , wherein the UE is configured with a plurality of sub-slot structures for PUCCH resource allocation.

8. A base station (BS), comprising:

one or more non-transitory computer-readable media storing one or more computer-executable instructions; and

at least one processor coupled to the one or more non-transitory computer-readable media and configured to execute the one or more computer-executable instructions to cause the BS to:

transmit, to a user equipment (UE), a configuration to configure a sub-slot structure in a slot for a plurality of physical uplink control channel (PUCCH) resources for Hybrid Automatic Repeat Request-ACKnowledgement (HARQ-ACK) feedback in response to at least one physical downlink shared channel (PDSCH) for ultra-reliable low-latency communication (URLLC); and

receive, from the UE, the HARQ-ACK feedback in response to the at least one PDSCH for URLLC based on the configured sub-slot structure in the slot, wherein:

the plurality of PUCCH resources are confined within a sub-slot, and

each of PUCCH resource allocations for the plurality of PUCCH resources is confined within the sub-slot based on the configured sub-slot structure.

9. The BS of claim 8 , wherein the sub-slot structure comprises a 2-symbol structure, a 3 and 4-symbol structure or a 7-symbol structure.

10. The BS of claim 8 , wherein the UE is configured with higher layer signaling for the sub-slot structure for PUCCH allocation.

11. The BS of claim 8 , wherein:

the UE is configured with a subset of sub-slots in the sub-slot structure, and

the plurality of PUCCH resources are configured within the sub-slots in the subset of the sub-slot structure.

12. The BS of claim 8 , wherein the UE is configured with a plurality of subsets of sub-slots in the sub-slot structure for PUCCH resource allocation.

13. The BS of claim 12 , wherein the plurality of subsets of sub-slots in the sub-slot structure are specified, and the UE is configured, by higher layer signaling via the subset of sub-slots in the sub-slot structure.

14. The BS of claim 8 , wherein the UE is configured with a plurality of sub-slot structures for PUCCH resource allocation.

15. A method performed by a user equipment (UE), the method comprising:

receiving, from a base station (BS), a configuration to configure a sub-slot structure in a slot for a plurality of physical uplink control channel (PUCCH) resources for Hybrid Automatic Repeat Request-ACKnowledgement (HARQ-ACK) feedback in response to at least one physical downlink shared channel (PDSCH) for ultra-reliable low-latency communication (URLLC); and

transmitting the HARQ-ACK feedback in response to the at least one PDSCH for URLLC based on the configured sub-slot structure in the slot, wherein:

the plurality of PUCCH resources are confined within a sub-slot, and

each of PUCCH resource allocations for the plurality of PUCCH resources is confined within the sub-slot based on the configured sub-slot structure.

16. The method of claim 15 , wherein the UE is configured with a plurality of sub-slot structures for PUCCH resource allocation and the sub-slot structure comprises a 2-symbol structure, a 3 and 4-symbol structure or a 7-symbol structure.

17. The method of claim 15 , wherein the UE is configured with higher layer signaling for the sub-slot structure for PUCCH allocation.

18. The method of claim 15 , wherein:

the UE is configured with a subset of sub-slots in the sub-slot structure, and

the plurality of PUCCH resources are configured within the sub-slots in the subset of the sub-slot structure.

19. The method of claim 15 , wherein the UE is configured with a plurality of subsets of sub-slots in the sub-slot structure for PUCCH resource allocation.

20. The method of claim 19 , wherein the plurality of subsets of sub-slots in the sub-slot structure are specified, and the UE is configured, by higher layer signaling via the subset of sub-slots in the sub-slot structure.