Sidelink resource allocation in unlicensed spectrum

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

• identifying a resource selection configuration for resource selection between a plurality of candidate resources of a plurality of component carriers for sidelink communications within a shared radio frequency spectrum band;
• performing sensing within a sensing window for selecting a first candidate resource of the plurality of candidate resources on a first component carrier of the plurality of component carriers based at least in part on the resource selection configuration;
• transmitting a first sidelink control message indicating a carrier index of the first component carrier and a resource allocation corresponding to the first candidate resource;
• and
• communicating a first sidelink message within the first candidate resource of the shared radio frequency spectrum band using the first component carrier.

An apparatus for wireless communication at a 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:
• identify a carrier selection configuration for selecting between a plurality of component carriers for sidelink communications within a shared radio frequency spectrum band;
• select a first component carrier of the plurality of component carriers in accordance with the carrier selection configuration;
• and
• communicate a first sidelink message within a first resource of the shared radio frequency spectrum band using the first component carrier.

An apparatus for wireless communication at a 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:
• identify a resource selection configuration for resource selection between a plurality of candidate resources of a plurality of component carriers for sidelink communications within a shared radio frequency spectrum band;
• perform sensing within a sensing window for selecting a first candidate resource of the plurality of candidate resources on a first component carrier of the plurality of component carriers based at least in part on the resource selection configuration;
• transmit a first sidelink control message indicating a carrier index of the first component carrier and a resource allocation corresponding to the first candidate resource;
• and
• communicate a first sidelink message within the first candidate resource of the shared radio frequency spectrum band using the first component carrier.