Mechanism and signalling on coreset and PUCCH resource grouping for multi-TRP operation

1. A method comprising:

receiving a single physical uplink control channel (PUCCH) resource group configuration that comprises an identifier for one or more mappings, wherein the PUCCH resource group configuration comprises a configuration for a first group of PUCCH resources associated with a first transmission and reception point (TRP) and a second group of PUCCH resources associated with a second TRP;

receiving downlink control information (DCI) messages that schedule PUCCH transmissions and indicate resources based at least on the one or more mappings; and

performing PUCCH transmissions to TRPs, including the first TRP and the second TRP, in accordance with the PUCCH resource group configuration and based on at least the resources indicated in the DCI messages.

2. The method of claim 1 , wherein a first part of the first group of PUCCH resources is time-division multiplexed with a first part of the second group of PUCCH resources, and wherein a second part of the first group of PUCCH resources is not time-division multiplexed with a second part of the second group of PUCCH resources.

3. The method of claim 1 , wherein:

receiving the PUCCH resource group configuration comprises receiving a PUCCH resource indicator (PRI) configuration for a first PRI and a second PRI, wherein a first part of the first group of PUCCH resources and a first part of the second group of PUCCH resources is addressed by the first PRI, and wherein a second part of the first group of PUCCH resources and a second part of the second group of PUCCH resources is addressed by the second PRI; and

receiving downlink control information (DCI) messages comprises receiving the DCI messages that schedule the PUCCH transmissions, wherein the PUCCH transmissions use resources indicated by PRIs included in the DCI messages.

4. The method of claim 1 , wherein receiving the PUCCH resource group configuration comprises receiving, via radio resource control (RRC) signaling, medium access control (MAC) control element (CE) signaling, or both, a serving cell identifier, a bandwidth part (BWP) identifier, a PUCCH resource identifier, and a PUCCH resource group identifier.

5. The method of claim 1 , wherein the PUCCH resource group configuration comprises a group association between a PUCCH resource group and a control resource set (CORESET) group.

6. The method of claim 5 , comprising:

receiving a CORESET pool configuration that comprises a serving cell identifier, a bandwidth part (BWP) identifier, a CORESET identifier, and a CORESET pool identifier associated with the CORESET pool.

7. The method of claim 1 , wherein a first part of the first group of PUCCH resources is time-division multiplexed with a first part of the second group of PUCCH resources, and wherein a second part of the first group of PUCCH resources at least partially overlaps with a second part of the second group of PUCCH resources.

8. The method of claim 7 , wherein performing the PUCCH transmissions comprises: transmitting first hybrid automatic repeat request (HARQ) feedback to the first TRP using the first part of the first group of PUCCH resources; and

transmitting second HARQ feedback to the second TRP using the first part of the second group of PUCCH resources.

9. An apparatus comprising one or more processors configured to perform operations comprising:

receiving a physical uplink control channel (PUCCH) resource group configuration that comprises an identifier for one or more mappings, wherein the PUCCH resource group configuration comprises a configuration for a first group of PUCCH resources associated with a first transmission and reception point (TRP) and a second group of PUCCH resources associated with a second TRP;

receiving downlink control information (DCI) messages that schedule PUCCH transmissions and indicate resources based at least on the one or more mappings; and

performing PUCCH transmissions to TRPs, including the first TRP and the second TRP, in accordance with the PUCCH resource group configuration and based on at least the resources indicated in the DCI messages.

10. The apparatus of claim 9 , wherein a first part of the first group of PUCCH resources is time-division multiplexed with a first part of the second group of PUCCH resources, and wherein a second part of the first group of PUCCH resources is not time-division multiplexed with a second part of the second group of PUCCH resources.

11. The apparatus of claim 9 , wherein:

receiving the PUCCH resource group configuration comprises receiving a PUCCH resource indicator (PRI) configuration for a first PRI and a second PRI, wherein a first part of the first group of PUCCH resources and a first part of the second group of PUCCH resources is addressed by the first PRI, and wherein a second part of the first group of PUCCH resources and a second part of the second group of PUCCH resources is addressed by the second PRI; and

receiving downlink control information (DCI) messages comprises receiving the DCI messages that schedule the PUCCH transmissions, wherein the PUCCH transmissions use resources indicated by PRIs included in the DCI messages.

12. The apparatus of claim 9 , wherein receiving the PUCCH resource group configuration comprises receiving, via radio resource control (RRC) signaling, medium access control (MAC) control element (CE) signaling, or both, a serving cell identifier, a bandwidth part (BWP) identifier, a PUCCH resource identifier, and a PUCCH resource group identifier.

13. The apparatus of claim 9 , wherein the PUCCH resource group configuration comprises a group association between a PUCCH resource group and a control resource set (CORESET) group.

14. The apparatus of claim 13 , wherein the operations comprise:

receiving a CORESET pool configuration that comprises a serving cell identifier, a bandwidth part (BWP) identifier, a CORESET identifier, and a CORESET pool identifier associated with the CORESET pool.

15. The apparatus of claim 9 , wherein a first part of the first group of PUCCH resources is time-division multiplexed with a first part of the second group of PUCCH resources, and wherein a second part of the first group of PUCCH resources at least partially overlaps with a second part of the second group of PUCCH resources.

16. The apparatus of claim 15 , wherein performing the PUCCH transmissions comprises: transmitting first hybrid automatic repeat request (HARQ) feedback to the first TRP on the first part of the first group of PUCCH resources; and

transmitting second HARQ feedback to the second TRP on the first part of the second group of PUCCH resources.

17. An apparatus comprising one or more processors configured to perform operations comprising:

transmitting a physical uplink control channel (PUCCH) resource group configuration that comprises an identifier for one or more mappings, wherein the PUCCH resource group configuration comprises a configuration for a first group of PUCCH resources associated with a first transmission and reception point (TRP) and a second group of PUCCH resources associated with a second TRP;

transmitting downlink control information (DCI) messages that schedule PUCCH transmissions and indicate resources based at least on the one or more mappings; and

receiving one or more PUCCH transmissions to one or more TRPs in accordance with the PUCCH resource group configuration and based on at least the resources indicated in the DCI messages.

18. The apparatus of claim 17 , wherein a first part of the first group of PUCCH resources is time-division multiplexed with a first part of the second group of PUCCH resources, and wherein a second part of the first group of PUCCH resources is not time-division multiplexed with a second part of the second group of PUCCH resources.

19. The apparatus of claim 18 , wherein the one or more processors are configured to provide a PUCCH resource indicator (PRI) configuration for a first PRI and a second PRI, wherein the first part of the first group of PUCCH resources and the first part of the second group of PUCCH resources is addressed by the first PRI, and wherein the second part of the first group of PUCCH resources and the second part of the second group of PUCCH resources is addressed by the second PRI.

20. The apparatus of claim 17 , wherein the PUCCH resource group configuration comprises a group association between a PUCCH resource group and a control resource set (CORESET) pool.