Techniques and apparatuses for hybrid automatic repeat request acknowledgement (HARQ-ACK) feedback for carrier aggregation in new radio

1. A method of wireless communication performed by a user equipment (UE), comprising:

determining a first hybrid automatic repeat request acknowledgement (HARQ-ACK) payload for a first component carrier (CC) set based at least on a first downlink assignment index (DAI);

determining a second HARQ-ACK payload for a second CC set based at least on a second DAI; and

transmitting the first HARQ-ACK payload for the first CC set and the second HARQ-ACK payload for the second CC set,

wherein at least one CC is assigned to the first CC set or the second CC set based at least on a semi-static code block group configuration for the at least one CC,

wherein the first HARQ-ACK payload for the first CC set is concatenated in a first HARQ-ACK payload group and the second HARQ-ACK payload for the second CC set is concatenated in a second HARQ-ACK payload group, and

wherein the first HARQ-ACK payload group and the second HARQ-ACK payload group are concatenated with one another for transmission.

2. The method of claim 1 , wherein one or more first CCs included in the first CC set are associated with a first code block group (CBG) configuration, and wherein one or more second CCs included in the second CC set are associated with a second CBG configuration that is different from the first CBG configuration.

3. The method of claim 2 , wherein the first CBG configuration is a configuration where CBGs are enabled and the second CBG configuration is a configuration where CBGs are disabled.

4. The method of claim 1 , wherein at least one different CC is assigned to the first CC set or the second CC set based at least on a dynamic code block group configuration, for the at least one different CC, indicated in fallback downlink control information that overrides a default or semi-static code block group configuration.

5. The method of claim 1 , wherein one or more first CCs are assigned to the first CC set and one or more second CCs are assigned to the second CC set for a particular transmission time interval.

6. The method of claim 1 , wherein one or more first CCs are assigned to the first CC set and one or more second CCs are assigned to the second CC set based at least on a determination that code block groups are enabled for at least one CC of the UE.

7. The method of claim 1 , wherein the first DAI is a first cumulative DAI and the second DAI is a second cumulative DAI.

8. The method of claim 1 , wherein the first DAI is a first total DAI and the second DAI is a second total DAI.

9. The method of claim 1 , wherein at least one of the first HARQ-ACK payload group or the second HARQ-ACK payload group is padded with DAI padding prior to concatenation with one another.

10. The method of claim 1 , wherein a size of the first HARQ-ACK payload is different from a size of the second HARQ-ACK payload.

11. The method of claim 1 , further comprising:

transmitting a first size indicator that indicates a first size of the first HARQ-ACK payload and a second size indicator that indicates a second size of the second HARQ-ACK payload.

12. A user equipment (UE) for wireless communication, comprising:

memory; and

one or more processors operatively coupled to the memory, the memory and the one or more processors configured to:

determine a first hybrid automatic repeat request acknowledgement (HARQ-ACK) payload for a first component carrier (CC) set based at least on a first downlink assignment index (DAI);

determine a second HARQ-ACK payload for a second CC set based at least on a second DAI; and

transmit the first HARQ-ACK payload for the first CC set and the second HARQ-ACK payload for the second CC set,

wherein at least one CC is assigned to the first CC set or the second CC set based at least on a semi-static code block group configuration for the at least one CC,

wherein the first HARQ-ACK payload for the first CC set is concatenated in a first HARQ-ACK payload group and the second HARQ-ACK payload for the second CC set is concatenated in a second HARQ-ACK payload group, and

wherein the first HARQ-ACK payload group and the second HARQ-ACK payload group are concatenated with one another for transmission.

13. The UE of claim 12 , wherein one or more first CCs included in the first CC set are associated with a first code block group (CBG) configuration, and wherein one or more second CCs included in the second CC set are associated with a second CBG configuration that is different from the first CBG configuration.

14. The UE of claim 13 , wherein the first CBG configuration is a configuration where CBGs are enabled and the second CBG configuration is a configuration where CBGs are disabled.

15. The UE of claim 12 , wherein at least one different CC is assigned to the first CC set or the second CC set based at least on

a dynamic code block group configuration, for the at least different one CC, indicated in fallback downlink control information that overrides the semi-static code block group configuration.

16. The UE of claim 12 , wherein one or more first CCs are assigned to the first CC set and one or more second CCs are assigned to the second CC set for a particular transmission time interval.

17. The UE of claim 12 , wherein one or more first CCs are assigned to the first CC set and one or more second CCs are assigned to the second CC set based at least on a determination that code block groups are enabled for at least one CC of the UE.

18. The UE of claim 12 , wherein the first DAI includes at least one of a first cumulative DAI or a first total DAI, and wherein the second DAI includes at least one of a second cumulative DAI or a second total DAI.

19. The UE of claim 12 , wherein at least one of the first HARQ-ACK payload group or the second HARQ-ACK payload group is padded with DAI padding prior to concatenation with one another.

20. The UE of claim 12 , wherein a size of the first HARQ-ACK payload is different from a size of the second HARQ-ACK payload.

21. The UE of claim 12 , wherein the one or more processors are further configured to:

transmit a first size indicator that indicates a first size of the first HARQ-ACK payload and a second size indicator that indicates a second size of the second HARQ-ACK payload.

22. A non-transitory computer-readable medium storing instructions for wireless communication, the instructions comprising:

one or more instructions that, when executed by one or more processors of a user equipment (UE), cause the one or more processors to:

determine a first hybrid automatic repeat request acknowledgement (HARQ-ACK) payload for a first component carrier (CC) set based at least on a first downlink assignment index (DAI);

determine a second HARQ-ACK payload for a second CC set based at least part on a second DAI; and

transmit the first HARQ-ACK payload for the first CC set and the second HARQ-ACK payload for the second CC set,

wherein at least one CC is assigned to the first CC set or the second CC set based at least on a semi-static code block group configuration for the at least one CC,

wherein the first HARQ-ACK payload for the first CC set is concatenated in a first HARQ-ACK payload group and the second HARQ-ACK payload for the second CC set is concatenated in a second HARQ-ACK payload group, and

wherein the first HARQ-ACK payload group and the second HARQ-ACK payload group are concatenated with one another for transmission.

23. The non-transitory computer-readable medium of claim 22 , wherein one or more first CCs included in the first CC set are associated with a first code block group (CBG) configuration, and wherein one or more second CCs included in the second CC set are associated with a second CBG configuration that is different from the first CBG configuration.

24. The non-transitory computer-readable medium of claim 23 , wherein the first CBG configuration is a configuration where CBGs are enabled and the second CBG configuration is a configuration where CBGs are disabled.

25. The non-transitory computer-readable medium of claim 22 , wherein at least one different CC is assigned to the first CC set or the second CC set based at least on

a dynamic code block group configuration, for the at least one different CC, indicated in fallback downlink control information that overrides the semi-static code block group configuration.

26. The non-transitory computer-readable medium of claim 22 , wherein one or more first CCs are assigned to the first CC set and one or more second CCs are assigned to the second CC set based at least on a determination that code block groups are enabled for at least one CC of the UE.

27. The non-transitory computer-readable medium of claim 22 , wherein the first DAI includes at least one of a first cumulative DAI or a first total DAI, and wherein the second DAI includes at least one of a second cumulative DAI or a second total DAI.

28. The non-transitory computer-readable medium of claim 22 , wherein at least one of the first HARQ-ACK payload group or the second HARQ-ACK payload group is padded with DAI padding prior to concatenation with one another.

29. The non-transitory computer-readable medium of claim 22 , wherein a size of the first HARQ-ACK payload is different from a size of the second HARQ-ACK payload.

30. The non-transitory computer-readable medium of claim 22 , wherein the instructions further comprise:

one or more instructions to transmit a first size indicator that indicates a first size of the first HARQ-ACK payload and a second size indicator that indicates a second size of the second HARQ-ACK payload.

31. An apparatus for wireless communication, comprising:

means for determining a first hybrid automatic repeat request acknowledgement (HARQ-ACK) payload for a first component carrier (CC) set based at least on a first downlink assignment index (DAI);

means for determining a second HARQ-ACK payload for a second CC set based at least on a second DAI; and

means for transmitting the first HARQ-ACK payload for the first CC set and the second HARQ-ACK payload for the second CC set,

wherein at least one CC is assigned to the first CC set or the second CC set based at least on a semi-static code block group configuration for the at least one CC,

wherein the first HARQ-ACK payload for the first CC set is concatenated in a first HARQ-ACK payload group and the second HARQ-ACK payload for the second CC set is concatenated in a second HARQ-ACK payload group, and

wherein the first HARQ-ACK payload group and the second HARQ-ACK payload group are concatenated with one another for transmission.

32. The apparatus of claim 31 , wherein one or more first CCs included in the first CC set are associated with a first code block group (CBG) configuration, and wherein one or more second CCs included in the second CC set are associated with a second CBG configuration that is different from the first CBG configuration.

33. The apparatus of claim 32 , wherein the first CBG configuration is a configuration where CBGs are enabled and the second CBG configuration is a configuration where CBGs are disabled.

34. The apparatus of claim 31 , wherein at least one different CC is assigned to the first CC set or the second CC set based at least on

a dynamic code block group configuration, for the at least one different CC, indicated in fallback downlink control information that overrides the semi-static code block group configuration.

35. The apparatus of claim 31 , wherein one or more first CCs are assigned to the first CC set and one or more second CCs are assigned to the second CC set for a particular transmission time interval.

36. The apparatus of claim 31 , wherein one or more first CCs are assigned to the first CC set and one or more second CCs are assigned to the second CC set based at least on a determination that code block groups are enabled for at least one CC of the apparatus.

37. The apparatus of claim 31 , wherein the first DAI includes at least one of a first cumulative DAI or a first total DAI, and wherein the second DAI includes at least one of a second cumulative DAI or a second total DAI.

38. The apparatus of claim 31 , wherein the first HARQ-ACK payload group or the second HARQ-ACK payload group is padded with DAI padding prior to concatenation with one another.

39. The apparatus of claim 31 , wherein a size of the first HARQ-ACK payload is different from a size of the second HARQ-ACK payload.

40. The apparatus of claim 31 , further comprising:

means for transmitting a first size indicator that indicates a first size of the first HARQ-ACK payload and a second size indicator that indicates a second size of the second HARQ-ACK payload.