Resource reservation in sidelink communications

1. A transmit user equipment (UE) configured for wireless communication, comprising:

a memory; and

one or more processors coupled to the memory, the one or more processors configured to cause the transmit UE to:

determine that a channel busy ratio satisfies a channel busy ratio threshold;

reserve, based at least in part on determining that the channel busy ratio satisfies the channel busy ratio threshold, a resource in a set of resources outside of a sidelink discontinuous reception (DRX) on duration of a receive UE, the resource being reserved for transmission of a packet with a particular priority to the receive UE; and

transmit the packet using the resource based at least in part on reserving the resource.

2. The transmit UE of claim 1 , wherein the one or more processors are further configured to cause the transmit UE to:

determine that a channel occupancy ratio satisfies a channel occupancy ratio threshold; and

wherein the one or more processors, when reserving the resource, are configured to cause the transmit UE to:

reserve the resource based at least in part on determining that the channel occupancy ratio satisfies the channel occupancy ratio threshold.

3. The transmit UE of claim 1 , wherein the one or more processors, when reserving the resource, are configured to cause the transmit UE to:

reserve the resource based at least in part on the particular priority of the packet.

4. The transmit UE of claim 1 , wherein the channel busy ratio threshold is selected based at least in part on a corresponding channel busy ratio range of a set of channel busy ratio ranges, and

wherein each channel busy ratio range is associated with a respective set of parameters, the respective set of parameters including at least one of a channel occupancy ratio parameter, a maximum transmit power parameter, or a modulation and coding scheme parameter.

5. The transmit UE of claim 1 , wherein the channel busy ratio is within a channel busy ratio range of a set of channel busy ratio ranges.

6. The transmit UE of claim 5 , wherein the one or more processors, when reserving the resource, are configured to cause the transmit UE to:

reserve a particular quantity of resources in a particular span of resources, wherein the particular quantity and the particular span are based at least in part on at least one of the channel busy ratio range in which the channel busy ratio occurs or a packet priority of the packet.

7. The transmit UE of claim 1 , wherein the one or more processors, when reserving the resource, are configured to cause the transmit UE to:

reserve the resource based at least in part on a status of a communication parameter of the receive UE, wherein the status of the communication parameter is based at least in part on the channel busy ratio, and wherein the communication parameter is at least one of a channel occupancy range parameter, a maximum transmit power parameter, a modulation and coding scheme parameter, a resource block range parameter, or a re-transmission range parameter.

8. The transmit UE of claim 7 , wherein the channel busy ratio is within a channel busy ratio range of a set of channel busy ratio ranges, and

wherein each channel busy ratio range includes a corresponding value for the communication parameter of the receive UE.

9. The transmit UE of claim 1 , wherein the one or more processors, when reserving the resource, are configured to cause the transmit UE to:

reserve the resource based at least in part on a remaining packet delay budget for the packet.

10. The transmit UE of claim 1 , wherein the one or more processors are further configured to cause the transmit UE to:

determine a first set of parameters for resource reservation within the sidelink DRX on duration of the receive UE and a second set of parameters for resource reservation outside of the sidelink DRX on duration of the receive UE; and

wherein the one or more processors, that cause the transmit UE to transmit the packet, cause the transmit UE to:

transmit the packet using the resource and the first set of parameters for the resource based at least in part on the resource being within the sidelink DRX on duration of the receive UE.

11. The transmit UE of claim 1 , wherein the one or more processors, when reserving the resource, are further configured to cause the transmit UE to:

reserve the resource for a retransmission of the packet.

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

determining that a channel busy ratio satisfies a channel busy ratio threshold;

reserving, based at least in part on determining that the channel busy ratio satisfies the channel busy ratio threshold, a resource in a set of resources outside of a sidelink discontinuous reception (DRX) on duration of a receive UE, the resource being reserved for transmission of a packet with a particular priority to the receive UE; and

transmitting the packet using the resource based at least in part on reserving the resource.

13. The method of claim 12 , further comprising:

determining that a channel occupancy ratio satisfies a channel occupancy ratio threshold; and

wherein reserving the resource comprises:

reserving the resource based at least in part on determining that the channel occupancy ratio satisfies the channel occupancy ratio threshold.

14. The method of claim 12 , wherein reserving the resource comprises:

reserving the resource based at least in part on the particular priority of the packet.

15. The method of claim 12 , wherein the channel busy ratio threshold is selected based at least in part on a corresponding channel busy ratio range of a set of channel busy ratio ranges, and

wherein each channel busy ratio range is associated with a respective set of parameters, the respective set of parameters including at least one of a channel occupancy ratio parameter, a maximum transmit power parameter, or a modulation and coding scheme parameter.

16. The method of claim 12 , wherein the channel busy ratio is within a channel busy ratio range of a set of channel busy ratio ranges.

17. The method of claim 16 , wherein reserving the resource comprises:

reserving a particular quantity of resources in a particular span of resources, wherein the particular quantity and the particular span are based at least in part on at least one of the channel busy ratio range in which the channel busy ratio occurs or a packet priority of the packet.

18. The method of claim 12 , wherein reserving the resource comprises:

reserving the resource based at least in part on a status of a communication parameter of the receive UE, wherein the status of the communication parameter is based at least in part on the channel busy ratio, and wherein the communication parameter is at least one of a channel occupancy range parameter, a maximum transmit power parameter, a modulation and coding scheme parameter, a resource block range parameter, or a re-transmission range parameter.

19. The method of claim 18 , wherein the channel busy ratio is within a channel busy ratio range of a set of channel busy ratio ranges, and

wherein each channel busy ratio range includes a corresponding value for the communication parameter of the receive UE.

20. The method of claim 12 , wherein reserving the resource comprises:

reserving the resource based at least in part on a remaining packet delay budget for the packet.

21. The method of claim 12 , further comprising:

determining a first set of parameters for a first-resource reservation within the sidelink DRX on duration of the receive UE and a second set of parameters for resource reservation outside of the sidelink DRX on duration of the receive UE; and

wherein transmitting the packet comprises:

transmitting the packet using the resource and the first set of parameters for the resource based at least in part on the resource being within the sidelink DRX on duration of the receive UE.

22. The method of claim 12 , wherein reserving the resource comprises:

reserving the resource for a retransmission of the packet.

23. A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising:

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

determine that a channel busy ratio satisfies a channel busy ratio threshold;

reserve, based at least in part on determining that the channel busy ratio satisfies the channel busy ratio threshold, a resource in a set of resources outside of a sidelink discontinuous reception (DRX) on duration of a receive UE, the resource being reserved for transmission of a packet with a particular priority to the receive UE; and

transmit the packet using the resource based at least in part on reserving the resource.

24. The non-transitory computer-readable medium of claim 23 , wherein the one or more instructions further cause the UE to:

determine that a channel occupancy ratio satisfies a channel occupancy ratio threshold; and

wherein the one or more instructions, that cause the UE to reserve the resource, cause the UE to:

reserve the resource based at least in part on determining that the channel occupancy ratio satisfies the channel occupancy ratio threshold.

25. The non-transitory computer-readable medium of claim 23 , wherein the one or more instructions, that cause the UE to reserve the resource, cause the UE to:

reserve the resource based at least in part on the particular priority of the packet.

26. The non-transitory computer-readable medium of claim 23 , wherein the channel busy ratio threshold is selected based at least in part on a corresponding channel busy ratio range of a set of channel busy ratio ranges, and

wherein each channel busy ratio range is associated with a respective set of parameters, the respective set of parameters including at least one of a channel occupancy ratio parameter, a maximum transmit power parameter, or a modulation and coding scheme parameter.

27. An apparatus for wireless communication, comprising:

means for determining that a channel busy ratio satisfies a channel busy ratio threshold;

means for reserving, based at least in part on determining that the channel busy ratio satisfies the channel busy ratio threshold, a resource in a set of resources outside of a sidelink discontinuous reception (DRX) on duration of a receive UE, the resource being reserved for transmission of a packet with a particular priority to the receive UE; and

means for transmitting the packet using the resource based at least in part on reserving the resource.

28. The apparatus of claim 27 , further comprising:

means for determining that a channel occupancy ratio satisfies a channel occupancy ratio threshold; and

wherein the means for reserving the resource are configured to:

means for reserving the resource based at least in part on determining that the channel occupancy ratio satisfies the channel occupancy ratio threshold.

29. The apparatus of claim 27 , wherein the means for reserving the resource are configured to:

means for reserving the resource based at least in part on the particular priority of the packet.

30. The apparatus of claim 27 , wherein the channel busy ratio threshold is selected based at least in part on a corresponding channel busy ratio range of a set of channel busy ratio ranges, and

wherein each channel busy ratio range is associated with a respective set of parameters, the respective set of parameters including at least one of a channel occupancy ratio parameter, a maximum transmit power parameter, or a modulation and coding scheme parameter.