Beam determination for a slot aggregation

1. A method for wireless communications at a user equipment (UE), comprising:

transmitting to a base station an indication of a UE capability associated with a time threshold for a beam change at the UE;

receiving from the base station a control signal comprising a transmission configuration indicator (TCI) and a grant for a transport block over a first slot aggregation comprising a plurality of slots, wherein receiving the control signal comprises receiving a plurality of repetitions of the control signal over a second slot aggregation occurring prior to the first slot aggregation, and wherein a scheduling slot for the control signal comprises a slot carrying a last repetition of the plurality of repetitions of the control signal;

determining that an offset between the scheduling slot and a sequentially first slot of the first slot aggregation is smaller than the time threshold;

refraining from performing a beam change for the plurality of slots of the first slot aggregation; and

transmitting or receiving at least one instance of the transport block over at least one slot of the first slot aggregation using a UE beam, wherein the UE beam is selected based at least in part on the refraining.

2. The method of claim 1 , wherein the time threshold is based at least in part on the indicated UE capability.

3. The method of claim 2 , further comprising:

receiving from the base station during a second scheduling slot a second control signal comprising a second transmission configuration indicator (TCI) and a second grant for a second transport block over the second slot aggregation comprising a second plurality of slots;

determining that an offset between the second scheduling slot and a sequentially first slot of the second slot aggregation is larger than the time threshold; and

performing the beam change based at least in part on the second TCI.

4. The method of claim 1 , further comprising:

receiving a semi-static slot configuration, wherein a portion of the first slot aggregation conflicts with the semi-static slot configuration.

5. The method of claim 4 , further comprising:

ignoring a portion of the first slot aggregation that conflicts with the semi-static slot configuration.

6. The method of claim 4 , wherein a sequentially first slot of the first slot aggregation is a first slot of a second portion of the first slot aggregation that does not conflict with the semi-static slot configuration.

7. The method of claim 1 , wherein the first slot aggregation includes a pair of slots.

8. The method of claim 7 , wherein the UE is configured to transmit or receive on the pair of slots using a same MCS and a same resource element allocation.

9. The method of claim 1 , wherein the first slot aggregation and second slot aggregation are part of a plurality of slot aggregations.

10. The method of claim 9 , wherein each of the plurality of slot aggregations comprises a pair of slots, and each slot aggregation is adjacent to two other slot aggregations.

11. The method of claim 9 , wherein the UE is configured to transmit or receive on the pair of slots using a same MCS and a same resource element allocation.

12. An apparatus for wireless communications at a user equipment (UE), comprising: a processor, memory in electronic communication with the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to:

transmit to a base station an indication of a UE capability associated with a time threshold for a beam change at the UE;

receive from the base station a control signal comprising a transmission configuration indicator (TCI) and a grant for a transport block over a first slot aggregation comprising a plurality of slots, wherein receiving the control signal comprises receiving a plurality of repetitions of the control signal over a second slot aggregation occurring prior to the first slot aggregation, and wherein a scheduling slot for the control signal comprises a slot carrying a last repetition of the plurality of repetitions of the control signal;

determine that an offset between the scheduling slot and a sequentially first slot of the first slot aggregation is smaller than the time threshold;

refrain from performing a beam change for the plurality of slots of the first slot aggregation; and

transmit or receive at least one instance of the transport block over at least one slot of the first slot aggregation using a UE beam, wherein the UE beam is selected based at least in part on the refraining.

13. The apparatus of claim 12 , wherein the time threshold is based at least in part on the indicated UE capability.

14. The apparatus of claim 13 , wherein the instructions are further executable by the processor to cause the apparatus to:

receive, from the base station, during a second scheduling slot a second control signal comprising a second transmission configuration indicator (TCI) and a second grant for a second transport block over the second slot aggregation comprising a second plurality of slots;

perform the beam change based at least in part on the second TCI if the time threshold is less than an offset between the second scheduling slot and a sequentially first slot of the second slot aggregation.

15. An apparatus for wireless communications at a user equipment (UE), comprising:

means for transmitting to a base station an indication of a UE capability associated with a time threshold for a beam change at the UE;

means for receiving from the base station a control signal comprising a transmission configuration indicator (TCI) and a grant for a transport block over a first slot aggregation comprising a plurality of slots, wherein the means for receiving the control signal comprises means for receiving a plurality of repetitions of the control signal over a second slot aggregation occurring prior to the first slot aggregation, and wherein a scheduling slot for the control signal comprises a slot carrying a last repetition of the plurality of repetitions of the control signal;

means for determining that an offset between the scheduling slot and a sequentially first slot of the first slot aggregation is smaller than the time threshold;

means for refraining from performing a beam change for the plurality of slots of the first slot aggregation; and

means for transmitting or receiving at least one instance of the transport block over at least one slot of the first slot aggregation using a UE beam, wherein the UE beam is selected based at least in part on the refraining.

16. The apparatus of claim 15 , wherein the time threshold is based at least in part on the indicated UE capability.

17. The apparatus of claim 16 , further comprising:

means for receiving from the base station during a second scheduling slot a second control signal comprising a second transmission configuration indicator (TCI) and a second grant for a second transport block over the second slot aggregation comprising a second plurality of slots;

means for determining that an offset between the second scheduling slot and a sequentially first slot of the second slot aggregation is larger than the time threshold; and

means for performing the beam change based at least in part on the second TCI.

18. A non-transitory computer-readable medium storing code for wireless communications at a user equipment (UE), the code comprising instructions executable by a processor to:

transmit to a base station an indication of a UE capability associated with a time threshold for a beam change at the UE;

receive from the base station a control signal comprising a transmission configuration indicator (TCI) and a grant for a transport block over a first slot aggregation comprising a plurality of slots, wherein receiving the control signal comprises receiving a plurality of repetitions of the control signal over a second slot aggregation occurring prior to the first slot aggregation, and wherein a scheduling slot for the control signal comprises a slot carrying a last repetition of the plurality of repetitions of the control signal;

determine that an offset between the scheduling slot and a sequentially first slot of the first slot aggregation is smaller than the time threshold;

refrain from performing a beam change for the plurality of slots of the first slot aggregation; and

transmit or receive at least one instance of the transport block over at least one slot of the first slot aggregation using a UE beam, wherein the UE beam is selected based at least in part on the refraining.

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

receiving a semi-static slot configuration;

transmitting to a base station an indication of a UE capability associated with a time threshold for a beam change at the UE;

receiving from the base station a control signal comprising a transmission configuration indicator (TCI) and a grant for transmission of a transport block over a sequentially second slot in a first slot aggregation of a pair of slots, the first slot aggregation including a sequentially first slot and the sequentially second slot, wherein the sequentially second slot conflicts with the semi-static slot configuration, wherein receiving the control signal comprises receiving a plurality of repetitions of the control signal over a second slot aggregation occurring prior to the first slot aggregation, and wherein a scheduling slot for the control signal comprises a slot carrying a last repetition of the plurality of repetitions of the control signal;

determining that an offset between the scheduling slot and a sequentially first slot of the first slot aggregation is smaller than the time threshold;

refraining from performing a beam change for the plurality of slots of the first slot aggregation; and

transmitting or receiving at least one instance of the transport block over at least one slot of the first slot aggregation using a UE beam, wherein the UE beam is selected based at least in part on the refraining.