Method and apparatus for transmission and reception of sidelink information in unlicensed band

A method performed by a second terminal in a communication system, the method comprising:

• receiving, from a first terminal, sidelink (SL) control information scheduling SL data, the SL control information including an indicator indicating whether a physical SL feedback channel (PSFCH) resource is included in a channel occupancy time (COT);
• receiving, from the first terminal, the SL data on a physical SL shared channel (PSSCH);
• identifying hybrid automatic repeat request (HARQ) feedback associated with the SL data;
• and
• transmitting, to the first terminal, the HARQ feedback on the PSFCH resource based on a channel access procedure based on the indicator.

A first terminal in a communication system, the first terminal comprising:

• a transceiver;
• and
• a controller coupled with the transceiver and configured to:
• transmit, to a second terminal, sidelink (SL) control information scheduling SL data for the second terminal,
• transmit, to the second terminal, the SL data on a physical SL shared channel (PSSCH), and
• receive, from the second terminal, hybrid automatic repeat request (HARQ) feedback associated with the SL data on a physical SL feedback channel (PSFCH) resource,
• wherein the SL control information includes an indicator indicating whether the PSFCH resource is included in a channel occupancy time (COT).

A second terminal in a communication system, the second terminal comprising:

• a transceiver;
• a controller coupled with the transceiver and configured to:
• receive, from a first terminal, sidelink (SL) control information scheduling SL data, the SL control information including an indicator indicating whether a physical SL feedback channel (PSFCH) resource is included in a channel occupancy time (COT),
• receive, from the first terminal, the SL data on a physical SL shared channel (PSSCH),
• identify hybrid automatic repeat request (HARQ) feedback associated with the SL data, and
• transmit, to the first terminal, the HARQ feedback on the PSFCH resource based on a channel access procedure based on the indicator.