Carrier aggregation (CA) of mixed numerologies

1. A method for wireless communications by a network entity, comprising:

scheduling, via a first component carrier (CC) having a first numerology, a user equipment (UE) for at least one downlink transmission in the first CC and at least one downlink transmission in a second CC having a second numerology;

receiving, from the UE, uplink control information (UCI) in one of the first or second CCs carrying feedback for the downlink transmissions in both the first and second CCs, wherein the UCI comprises acknowledgement information bundled as a single acknowledgement or negative acknowledgment per data block over a plurality of time-domain resources;

providing a downlink assignment index (DAI) for each of the downlink transmissions; and

wherein DAIs are assigned to the downlink transmissions in a time-first, frequency-second manner.

2. The method of claim 1 , wherein:

the first numerology is defined by a first subcarrier spacing and a first transmission time interval (TTI); and

the second numerology is defined by a second subcarrier spacing and a second transmission time interval (TTI).

3. The method of claim 1 , wherein:

the first numerology has a transmission time interval (TTI) that is greater than a TTI of the second numerology; and

the UCI is provided in a plurality of PUCCH transmissions on the second CC.

4. The method of claim 1 , wherein:

the first numerology has a transmission time interval (TTI) that is greater than a TTI of the second numerology; and

the UCI is available in only a subset of slots in the second CC.

5. The method of claim 4 , wherein the UCI is available in a last slot of a bundle of slots.

6. The method of claim 1 , wherein:

the first numerology has a transmission time interval (TTI) that is less than a TTI of the second numerology; and

the UCI is provided in a PUCCH on the second CC and for the downlink transmissions.

7. The method of claim 6 , wherein the single acknowledgement or negative acknowledgment is bundled per transport block over multiple time slots.

8. The method of claim 6 , wherein a number of hybrid acknowledgment retransmission request (HARQ) processes supported on at least one of the first or second CC depends on which of the first or second CC is used for HARQ feedback.

9. A method for wireless communications by a user equipment (UE), comprising:

receiving scheduling, via a first component carrier (CC) having a first numerology, for at least one downlink transmission in the first CC and at least one downlink transmission in a second CC having a second numerology;

transmitting uplink control information (UCI) in one of the first or second CCs carrying feedback for the downlink transmissions in both the first and second CCs, wherein the UCI comprises acknowledgment information bundled as a single acknowledgement or negative acknowledgment per data block over a plurality of time-domain resources;

receiving a downlink assignment index (DAI) for each downlink transmission; and

wherein DAIs are assigned to the downlink transmissions in a time-first, frequency-second manner.

10. The method of claim 9 , wherein:

the first numerology is defined by a first subcarrier spacing and a first transmission time interval (TTI); and

the second numerology is defined by a second subcarrier spacing and a second transmission time interval (TTI).

11. The method of claim 9 , wherein:

the first numerology has a transmission time interval (TTI) that is greater than a TTI of the second numerology; and

the UCI is provided in a plurality of PUCCH transmissions on the second CC.

12. The method of claim 9 , wherein:

the first numerology has a transmission time interval (TTI) that is greater than a TTI of the second numerology; and

the UCI is available in only a subset of slots in the second CC.

13. The method of claim 12 , wherein the UCI is available in a last slot of a bundle of slots.

14. The method of claim 9 , wherein:

the first numerology has a transmission time interval (TTI) that is less than a TTI of the second numerology; and

the UCI is provided in a PUCCH on the second CC and for the downlink transmissions.

15. The method of claim 14 , wherein the single acknowledgement or negative acknowledgment is bundled per transport block over multiple time slots.

16. The method of claim 14 , wherein a number of hybrid acknowledgment retransmission request (HARQ) processes supported on at least one of the first or second CC depends on which of the first or second CC is used for HARQ feedback.

17. A method for wireless communications by a network entity, comprising:

scheduling, via a first component carrier (CC) having a first numerology, a user equipment (UE) for at least one downlink transmission in the first CC and at least one downlink transmission in a second CC having a second numerology;

receiving, from the UE, uplink control information (UCI) in one of the first or second CCs carrying feedback for the downlink transmissions in both the first and second CCs, wherein the UCI comprises acknowledgement information bundled as a single acknowledgement or negative acknowledgment per data block over a plurality of time-domain resources;

providing a downlink assignment index (DAI) for each of the downlink transmissions;

wherein DAIs are assigned to the downlink transmissions in a time-first, frequency-second manner;

transmitting a single downlink control information (DCI), via the first, to schedule the UE for at least two transmissions in the second CC; and

communicating with the UE according to the transmissions scheduled by the DCI.

18. The method of claim 17 , wherein the DCI schedules at least two physical downlink shared channel (PDSCH) transmissions in the second CC.

19. A method for wireless communications by a user equipment (UE), comprising:

receiving scheduling, via a first component carrier (CC) having a first numerology, for at least one downlink transmission in the first CC and at least one downlink transmission in a second CC having a second numerology;

transmitting uplink control information (UCI) in one of the first or second CCs carrying feedback for the downlink transmissions in both the first and second CCs, wherein the UCI comprises acknowledgment information bundled as a single acknowledgement or negative acknowledgment per data block over a plurality of time-domain resources;

receiving a downlink assignment index (DAI) for each downlink transmission;

receiving a single downlink control information (DCI), from a base station via the first CC, scheduling the UE for at least two transmissions in the second CC;

communicating with the base station according to the transmissions scheduled by the DCI; and

wherein DAIs are assigned to the downlink transmissions in a time-first, frequency-second manner.

20. The method of claim 19 , wherein the DCI schedules at least two physical downlink shared channel (PDSCH) transmissions in the second CC.