Mechanisms for sidelink resource scheduling

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

receiving broadcast information from a base station that identifies one or more types of radio access technologies for which corresponding resources for vehicle-based sidelink communications are supported by the base station;

transmitting a request to the base station for resource scheduling information to perform a vehicle-based sidelink communication based at least in part on the identified one or more types of radio access technologies, the request comprising an indication of a type of resources associated with a corresponding radio access technology for the vehicle-based sidelink communication supported by the base station and a quality of service (QoS) metric associated with the vehicle-based sidelink communication; and

receiving, in response to the request, a response from the base station that comprises the resource scheduling information to perform the vehicle-based sidelink communication.

2. The method of claim 1 , further comprising:

determining a logical channel ID (LCID) based at least in part on the received response;

identifying a mapping between the LCID and the requested QoS metric; and

determining whether the requested QoS metric is accepted by the base station based at least in part on the mapping.

3. The method of claim 1 , further comprising:

transmitting a second request for at least one grant from the base station to perform the vehicle-based sidelink communication based at least in part on the received resource scheduling information; and

receiving a second response indicating the at least one grant allocated on a set of carrier frequencies from the base station based at least in part on the type of resources indicated in the request.

4. The method of claim 3 , wherein requesting the at least one grant further comprises transmitting a Buffer Status Report (BSR) to the base station.

5. The method of claim 3 , further comprising:

determining a logical channel ID (LCID) based at least in part on a mapping associated with the requested QoS metric, wherein the mapping is indicated in the response; and

including the LCID in the second request for the at least one grant.

6. The method of claim 3 , further comprising:

receiving the at least one grant based at least in part on receiving a Downlink Control Indicator (DCI); and

determining whether the at least one grant is allocated using Long Term Evolution (LTE) resources, New Radio (NR) resources, or both, based at least in part on a bit included in the DCI.

7. The method of claim 3 , further comprising:

determining a scrambling identifier associated with the vehicle-based sidelink communication based at least in part on the response; and

identifying the at least one grant to perform the vehicle-based sidelink communication based at least in part on determining that the at least one grant is scrambled using the scrambling identifier.

8. The method of claim 3 , wherein the second response comprises a timing associated with the at least one grant, a frequency associated with the at least one grant, a Bandwidth Part (BWP) associated with the at least one grant, a Modulation and Coding Scheme (MCS), a Carrier Indicator Field (CIF), or a combination thereof.

9. The method of claim 1 , wherein the response comprises information related to a Bandwidth Part (BWP) associated with the vehicle-based sidelink communication, decoding information for the vehicle-based sidelink communication comprising a Control Resource Set (CORESET) information, a location of at least a grant associated with the vehicle-based sidelink communication, a scrambling identifier associated with the vehicle-based sidelink communication, one or more mappings associated with the requested QoS metric, or a combination thereof.

10. The method of claim 9 , wherein the one or more mappings associated with the requested QoS metric comprise at least one of a first mapping between logical channel ID (LCID) and the requested QoS metric and a second mapping between the LCID and a logical channel group (LCG) ID.

11. The method of claim 1 , wherein the one or more types of resources comprise LTE resources, NR resources or both.

12. The method of claim 1 , wherein the request is included in a sidelink information message to the base station.

13. The method of claim 1 , wherein the request is included in an assistance information message to the base station.

14. The method of claim 1 , wherein the request or the response is a Radio Resource Control (RRC) message.

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

transmitting broadcast information to a user equipment (UE) that identifies one or more types of radio access technologies for which corresponding resources for vehicle-based sidelink communications are supported by the base station;

receiving a request from the UE for resource scheduling information to perform a vehicle-based sidelink communication based at least in part on the identified one or more types of radio access technologies, the request comprising an indication of a type of resources associated with a corresponding radio access technology for the vehicle-based sidelink communication supported by the base station and a quality of service (QoS) metric associated with the vehicle-based sidelink communication; and

transmitting to the UE, in response to the request, a response that comprises the resource scheduling information to perform the vehicle-based sidelink communication.

16. The method of claim 15 , further comprising:

determining a mapping between a logical channel ID (LCID) and the requested QoS metric, wherein the response further comprises an indication of the mapping.

17. The method of claim 15 , further comprising:

receiving from the UE, a second request for at least one grant to perform the vehicle-based sidelink communication based at least in part on the received resource scheduling information; and

transmitting a second response indicating the at least one grant allocated on a set of carrier frequencies based at least in part on the type of resources indicated in the request.

18. The method of claim 17 , wherein receiving the second request for the at least one grant further comprises receiving a Buffer Status Report (BSR).

19. The method of claim 17 , further comprising:

receiving a logical channel ID (LCID) in the second request, wherein the LCID is based at least in part on a mapping associated with the requested QoS metric indicated in the response.

20. The method of claim 17 , further comprising:

transmitting the at least one grant based at least in part on transmitting a Downlink Control Indicator (DCI); and

indicating whether the at least one grant is allocated using Long Term Evolution (LTE) resources, New Radio (NR) resources, or both, based at least in part on a bit included in the DCI.

21. The method of claim 17 , further comprising:

indicating in the response, a scrambling identifier associated with the vehicle-based sidelink communication; and

scrambling the at least one grant to perform the vehicle-based sidelink communication using the scrambling identifier.

22. The method of claim 17 , wherein the second response comprises a timing associated with the at least one grant, a frequency associated with the at least one grant, a Bandwidth Part (BWP) associated with the at least one grant, a Modulation and Coding Scheme (MCS), a Carrier Indicator Field (CIF), or a combination thereof.

23. The method of claim 15 , wherein the response comprises information related to a Bandwidth Part (BWP) associated with the vehicle-based sidelink communication, decoding information for the vehicle-based sidelink communication comprising a Control Resource Set (CORESET) information, a location of at least a grant associated with the vehicle-based sidelink communication, a scrambling identifier associated with the vehicle-based sidelink communication, one or more mappings associated with the requested QoS metric, or a combination thereof.

24. The method of claim 23 , wherein the one or more mappings associated with the requested QoS metric comprise at least one of a first mapping between logical channel ID (LCID) and the requested QoS metric and a second mapping between the LCID and a logical channel group (LCG) ID.

25. The method of claim 15 , wherein the one or more types of resources comprise LTE resources, NR resources or both.

26. The method of claim 15 , wherein the request is included in a sidelink information message to the base station.

27. The method of claim 15 , wherein the request is included in an assistance information message to the base station.

28. The method of claim 15 , wherein the request or the response is a Radio Resource Control (RRC) message.

29. An apparatus for wireless communication, 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 broadcast information from a base station that identifies one or more types of radio access technologies for which corresponding resources for vehicle-based sidelink communications are supported by the base station;

transmit a request to the base station for resource scheduling information to perform a vehicle-based sidelink communication based at least in part on the identified one or more types of radio access technologies, the request comprising an indication of a type of resources associated with a corresponding radio access technology for the vehicle-based sidelink communication supported by the base station and a quality of service (QoS) metric associated with the vehicle-based sidelink communication; and

receive, in response to the request, a response from the base station that comprises the resource scheduling information to perform the vehicle-based sidelink communication.

30. An apparatus for wireless communication, 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 broadcast information to a user equipment (UE) that identifies one or more types of radio access technologies for which corresponding resources for vehicle-based sidelink communications are supported by the base station;

receive a request from the UE for resource scheduling information to perform a vehicle-based sidelink communication based at least in part on the identified one or more types of radio access technologies, the request comprising an indication of a type of resources associated with a corresponding radio access technology for the vehicle-based sidelink communication supported by the base station and a quality of service (QoS) metric associated with the vehicle-based sidelink communication; and

transmit to the UE, in response to the request, a response that comprises the resource scheduling information to perform the vehicle-based sidelink communication.