Contention window adjustment for sidelink communication

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

• a memory;
• and
• one or more processors, coupled to the memory, configured to:
• transmit, during a channel occupancy time (COT) on a sidelink, a first sidelink transmission starting at a second starting symbol candidate that occurs after a first starting symbol candidate that occurs at a beginning of a first slot in the COT;
• transmit, during the COT on the sidelink, a second sidelink transmission that spans a duration of a second slot in the COT that occurs after the first slot;
• and
• determine a contention window adjustment based at least in part on hybrid automatic repeat request (HARQ) feedback received for the second slot.

A UE for wireless communication, comprising:

• a memory;
• and
• one or more processors, coupled to the memory, configured to:
• transmit, during a channel occupancy time (COT) on a sidelink, a first sidelink transmission starting at a second starting symbol candidate that occurs after a first starting symbol candidate that occurs at a beginning of a first slot in the COT;
• transmit, during the COT on the sidelink, a second sidelink transmission that spans a duration of a second slot in the COT that occurs after the first slot;
• and
• determine a contention window adjustment based at least in part on:
• first hybrid automatic repeat request (HARQ) feedback received for the first slot, or second HARQ feedback received for the second slot.

A UE for wireless communication, comprising:

• a memory;
• and
• one or more processors, coupled to the memory, configured to:
• transmit, during a channel occupancy time (COT) on a sidelink, a first sidelink transmission starting at a second starting symbol candidate that occurs after a first starting symbol candidate that occurs at a beginning of a first slot in the COT;
• transmit, during the COT on the sidelink, a second sidelink transmission that spans a duration of a second slot in the COT that occurs after the first slot;
• and
• determine a contention window adjustment based at least in part on:
• first hybrid automatic repeat request (HARQ) feedback received for the first slot, and
• second HARQ feedback received for the second slot.