Method and apparatus for feeding back HARQ-ACK in wireless communication system

A method performed by a base station in a wireless communication system, the method comprising:

• determining configured grant-downlink feedback information (CG-DFI);
• and
• transmitting, to a terminal, downlink control information, DCI, including the CG-DFI including hybrid automatic repeat request-acknowledgement (HARQ-ACK) feedback for at least one first physical uplink shared channel (PUSCH),
• wherein the HARQ-ACK feedback for the at least one first PUSCH is included in the CG-DFI, wherein the at least one PUSCH is associated with a code block group (CBG) based PUSCH and a contention window value, wherein the HARQ-ACK feedback corresponds to the at least one PUSCH in a reference duration,
• wherein if at least 10% of the HARQ-ACK feedback is ACK, the contention window value is a minimum value associated with a channel access priority class, and
• wherein if not at least 10% of the HARQ-ACK feedback is ACK, the contention window value is adjusted from a current value associated with the channel access priority class to a next higher value associated with the channel access priority class.

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

• a transceiver;
• and
• at least one processor configured to:
• receive, from a base station, downlink control information, DCI, including configured grant-downlink feedback information, CG-DFI, including hybrid automatic repeat request-acknowledgement (HARQ-ACK) feedback for at least one first physical uplink shared channel (PUSCH),
• identify the HARQ-ACK feedback for the at least one first PUSCH, based on the HARQ-ACK feedback included in the CG-DFI, wherein the at least one PUSCH is associated with a code block group (CBG) based PUSCH and a contention window value, and wherein the HARQ-ACK feedback corresponds to the at least one first PUSCH in a reference duration,
• if at least 10% of the HARQ-ACK feedback is ACK, adjust the contention window value to a minimum value associated with a channel access priority class, and
• if not at least 10% of the HARQ-ACK feedback is ACK, adjust the contention window value from a current value associated with the channel access priority class to a next higher value associated with the channel access priority class.

A base station in a wireless communication system, the base station comprising:

• a transceiver;
• and
• at least one processor configured to:
• determine configured grant-downlink feedback information (CG-DFI), and
• transmit, to a terminal via the transceiver, downlink control information, DCI, including the CG-DFI including hybrid automatic repeat request-acknowledgement (HARQ-ACK) feedback for at least one first physical uplink shared channel (PUSCH),
• wherein the HARQ-ACK feedback for the at least one first PUSCH is included in the CG-DFI,
• wherein the at least one PUSCH is associated with a code block group (CBG) based PUSCH and a contention window value,
• wherein the HARQ-ACK feedback corresponds to the at least one first PUSCH in a reference duration,
• wherein if at least 10% of the HARQ-ACK feedback is ACK, the contention window value is a minimum value associated with a channel access priority class, and
• wherein if not at least 10% of the HARQ-ACK feedback is ACK, the contention window value is adjusted from a current value associated with the channel access priority class to a next higher value configured for the channel access priority class.