Techniques for configured beam-sweeping reception for New Radio sidelink

1. A method for wireless communication at first user equipment (UE), comprising:

receiving, from a base station, an indication of a set of periodic reception occasions, each reception occasion of the set of periodic reception occasions including a plurality of reception opportunities for receiving sidelink control information from a second UE, wherein each reception opportunity of the plurality of reception opportunities is associated with a different receive beam;

monitoring, using one or more receive beams associated with one or more reception opportunities, for the sidelink control information over the one or more reception opportunities associated with a first reception occasion;

decoding whether the sidelink control information is present during a reception opportunity as a result of the monitoring; and

communicating with the second UE in accordance with the decoding.

2. The method of claim 1 , further comprising:

receiving, from the base station, a configuration of a plurality of sidelink feedback resources that each correspond to one of the plurality of reception opportunities associated with each reception occasion, wherein the configuration indicates a same quasi-colocation source for corresponding sidelink feedback resources and reception opportunities.

3. The method of claim 2 , wherein communicating with the second UE in accordance with the decoding comprises:

transmitting, to the second UE using a first directional beam, feedback over a first sidelink feedback resource corresponding to the reception opportunity based at least in part on decoding whether the sidelink control information is present during the reception opportunity, wherein the reception opportunity and the first sidelink feedback resource are both associated with a same first quasi-colocation source corresponding to the first directional beam in accordance with the configuration.

4. The method of claim 1 , further comprising:

receiving, from the base station, a configuration of a plurality of uplink control channel resources that each correspond to one of the plurality of reception opportunities associated with each reception occasion, wherein the configuration indicates, for each uplink control channel resource, whether that uplink control channel resource is exclusively for positive acknowledgement feedback or for either positive acknowledgement feedback or negative acknowledgement feedback.

5. The method of claim 4 , wherein the configuration indicates that each uplink control channel resource is exclusively for positive acknowledgement feedback.

6. The method of claim 4 , wherein the configuration indicates that a first subset of uplink control channel resources within each reception occasion are exclusively for positive acknowledgement feedback and that a final uplink control channel resource within each reception occasion is for either positive acknowledgement feedback or negative acknowledgement feedback.

7. The method of claim 4 , wherein the configuration indicates:

a supplemental uplink control channel resource for each reception occasion in addition to the plurality of uplink control channel resources that each correspond to one of the plurality of reception opportunities included within each reception occasion; and

that each uplink control channel resource of the plurality of uplink control channel resources is exclusively for positive acknowledgement feedback and that the supplemental uplink control channel resource is for either positive acknowledgement feedback or negative acknowledgement feedback.

8. The method of claim 1 , further comprising:

receiving, from the second UE, the sidelink control information over a first reception opportunity associated with the first reception occasion, wherein the sidelink control information indicates sidelink shared channel resource reservations for a remainder of the plurality of reception opportunities associated with the first reception occasion.

9. The method of claim 1 , further comprising:

receiving, from the second UE, the sidelink control information and sidelink data in a first reception opportunity associated with the first reception occasion, wherein the sidelink control information indicates a sidelink shared channel resource reservation for a re-transmission of the sidelink data, the sidelink shared channel resource reservation outside of the first reception occasion.

10. The method of claim 1 , wherein monitoring for the sidelink control information comprises:

monitoring for the sidelink control information over a first reception opportunity during a first time period using a first receive beam; and

switching to monitoring for the sidelink control information over a second reception opportunity during a second time period using a second receive beam after the first time period based at least in part on failing to decode the sidelink control information or corresponding sidelink data over the first reception opportunity.

11. The method of claim 1 , wherein the first reception occasion comprises a first reception opportunity and a second reception opportunity, and wherein monitoring for the sidelink control information comprises:

monitoring for the sidelink control information over the first reception opportunity during a first time period using a first receive beam; and

refraining from monitoring for the sidelink control information over the second reception opportunity based at least in part on successfully decoding the sidelink control information and corresponding sidelink data over the first reception opportunity.

12. The method of claim 1 , wherein each reception opportunity of the plurality of reception opportunities comprises a different set of time and frequency resources.

13. A method for wireless communication at a base station, comprising:

transmitting, to a first user equipment (UE), an indication of a set of periodic reception occasions, each reception occasion of the set of periodic reception occasions including a plurality of reception opportunities for receiving sidelink control information from a second UE, wherein each reception opportunity of the plurality of reception opportunities is associated with a different receive beam;

transmitting, to the second UE, a grant for transmitting the sidelink control information to the first UE over at least one of the plurality of reception opportunities associated with a first reception occasion; and

communicating with one or both of the first UE or the second UE based at least in part on transmitting the indication of the set of periodic reception occasions and the grant.

14. The method of claim 13 , further comprising:

transmitting, to the first UE, a configuration of a plurality of sidelink feedback resources that each correspond to one of the plurality of reception opportunities associated with each reception occasion, wherein the configuration indicates a same quasi-colocation source for corresponding sidelink feedback resources and reception opportunities.

15. The method of claim 13 , further comprising:

transmitting, to the first UE, a configuration of a plurality of uplink control channel resources that each correspond to one of the plurality of reception opportunities associated with each reception occasion, wherein the configuration indicates, for each uplink control channel resource, whether that uplink control channel resource is exclusively for positive acknowledgement feedback or for either positive acknowledgement feedback or negative acknowledgement feedback.

16. The method of claim 15 , wherein the configuration indicates that each uplink control channel resource is exclusively for positive acknowledgement feedback.

17. The method of claim 15 , wherein the configuration indicates that a first subset of uplink control channel resources within each reception occasion are exclusively for positive acknowledgement feedback and that a final uplink control channel resource within each reception occasion is for either positive acknowledgement feedback or negative acknowledgement feedback.

18. The method of claim 15 , wherein the configuration indicates:

a supplemental uplink control channel resource for each reception occasion in addition to the plurality of uplink control channel resources that each correspond to one of the plurality of reception opportunities included within each reception occasion; and

that each uplink control channel resource of the plurality of uplink control channel resources is exclusively for positive acknowledgement feedback and that the supplemental uplink control channel resource is for either positive acknowledgement feedback or negative acknowledgement feedback.

19. The method of claim 13 , wherein transmitting the grant to the second UE comprises:

transmitting a single grant scheduling the second UE to transmit the sidelink control information over a first reception opportunity associated with the first reception occasion, wherein the sidelink control information indicates sidelink shared channel resource reservations for a remainder of the plurality of reception opportunities associated with the first reception occasion.

20. The method of claim 13 , wherein transmitting the grant to the second UE comprises:

transmitting a plurality grants scheduling the second UE to transmit the sidelink control information and sidelink data over the plurality of reception opportunities associated with the first reception occasion, wherein the sidelink control information indicates a sidelink shared channel resource reservation for a re-transmission of the sidelink data, the sidelink shared channel resource reservation outside of the first reception occasion.

21. The method of claim 13 , further comprising:

re-scheduling a resource associated with a reception opportunity for sidelink communication to a third UE, wherein the third UE has a different identifier than the first UE.

22. The method of claim 13 , further comprising:

re-scheduling a resource associated with a reception opportunity for sidelink communication to a third UE, wherein the sidelink communication includes second sidelink control information for the third UE, the second sidelink control information associated with a lower-indexed sub-channel than the resource associated with the reception opportunity.

23. The method of claim 13 , wherein each reception opportunity of the plurality of reception opportunities comprises a different set of time and frequency resources.

24. An apparatus for wireless communication at first user equipment (UE), comprising:

a processor;

memory coupled with the processor; and

instructions stored in the memory and executable by the processor to cause the apparatus to:

receive, from a base station, an indication of a set of periodic reception occasions, each reception occasion of the set of periodic reception occasions including a plurality of reception opportunities for receiving sidelink control information from a second UE, wherein each reception opportunity of the plurality of reception opportunities is associated with a different receive beam;

monitor, using one or more receive beams associated with one or more reception opportunities, for the sidelink control information over the one or more reception opportunities associated with a first reception occasion;

decode whether the sidelink control information is present during a reception opportunity as a result of the monitoring; and

communicate with the second UE in accordance with the decoding.

25. The apparatus of claim 24 , wherein the instructions are further executable by the processor to cause the apparatus to:

receive, from the base station, a configuration of a plurality of sidelink feedback resources that each correspond to one of the plurality of reception opportunities associated with each reception occasion, wherein the configuration indicates a same quasi-colocation source for corresponding sidelink feedback resources and reception opportunities.

26. The apparatus of claim 24 , wherein the instructions are further executable by the processor to cause the apparatus to:

receive, from the base station, a configuration of a plurality of uplink control channel resources that each correspond to one of the plurality of reception opportunities associated with each reception occasion, wherein the configuration indicates, for each uplink control channel resource, whether that uplink control channel resource is exclusively for positive acknowledgement feedback or for either positive acknowledgement feedback or negative acknowledgement feedback.

27. The apparatus of claim 24 , wherein the instructions are further executable by the processor to cause the apparatus to:

receive, from the second UE, the sidelink control information over a first reception opportunity associated with the first reception occasion, wherein the sidelink control information indicates sidelink shared channel resource reservations for a remainder of the plurality of reception opportunities associated with the first reception occasion.

28. The apparatus of claim 24 , wherein the instructions are further executable by the processor to cause the apparatus to:

receive, from the second UE, the sidelink control information and sidelink data in a first reception opportunity associated with the first reception occasion, wherein the sidelink control information indicates a sidelink shared channel resource reservation for a re-transmission of the sidelink data, the sidelink shared channel resource reservation outside of the first reception occasion.

29. The apparatus of claim 24 , wherein the instructions to monitor for the sidelink control information are executable by the processor to cause the apparatus to:

monitor for the sidelink control information over a first reception opportunity during a first time period using a first receive beam; and

switch to monitoring for the sidelink control information over a second reception opportunity during a second time period using a second receive beam after the first time period based at least in part on failing to decode the sidelink control information or corresponding sidelink data over the first reception opportunity.

30. An apparatus for wireless communication at a base station, comprising:

a processor;

memory coupled with the processor; and

instructions stored in the memory and executable by the processor to cause the apparatus to:

transmit, to a first user equipment (UE), an indication of a set of periodic reception occasions, each reception occasion of the set of periodic reception occasions including a plurality of reception opportunities for receiving sidelink control information from a second UE, wherein each reception opportunity of the plurality of reception opportunities is associated with a different receive beam;

transmit, to the second UE, a grant for transmitting the sidelink control information to the first UE over at least one of the plurality of reception opportunities associated with a first reception occasion; and

communicate with one or both of the first UE or the second UE based at least in part on transmitting the indication of the set of periodic reception occasions and the grant.