Method and apparatus for transmitting/receiving signals for groupcast in wireless communication system

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

• transmitting a configuration including information indicating a feedback mode for a multicast broadcast services (MBS);
• transmitting:
• a first physical downlink shared channel (PDSCH) associated with the MBS, and
• a second PDSCH associated with the MBS,
• receiving a first physical uplink control channel (PUCCH),
• wherein:
• the configuration indicates a first HARQ-ACK reporting mode for first HARQ-ACK information for the first PDSCH,
• the configuration indicates a second HARQ-ACK reporting mode for second HARQ-ACK information for the second PDSCH, and
• the second HARQ-ACK information is received according to the first HARQ-ACK reporting mode, based on the second HARQ-ACK information being multiplexed with the first HARQ-ACK information in the first PUCCH.

A user equipment (UE) in a communication system, the UE comprising:

• a transceiver;
• and
• at least one processor configured to:
• receive a configuration including information indicating a feedback mode for a multicast broadcast services (MBS);
• receive:
• a first physical downlink shared channel (PDSCH) associated with the MBS, and
• a second PDSCH associated with the MBS,
• identify:
• first HARQ-ACK information for the first PDSCH,
• second HARQ-ACK information for the second PDSCH,
• transmit a first physical uplink control channel (PUCCH),
• wherein:
• the configuration indicates a first HARQ-ACK reporting mode for the first HARQ-ACK information for the first PDSCH,
• the configuration indicates a second HARQ-ACK reporting mode for the second HARQ-ACK information for the second PDSCH, and
• the second HARQ-ACK information is transmitted according to the first HARQ-ACK reporting mode, based on the second HARQ-ACK information being multiplexed with the first HARQ-ACK information in the first PUCCH.

Abase station in a communication system, the base station comprising:

• a transceiver;
• and
• at least one processor configured to:
• transmit a configuration including information indicating a feedback mode for a multicast broadcast services (MBS),
• transmit:
• a first physical downlink shared channel (PDSCH) associated with the MBS, and
• a second PDSCH associated with the MBS,
• receive a first physical uplink control channel (PUCCH),
• wherein:
• the configuration indicates a first HARQ-ACK reporting mode for first HARQ-ACK information for the first PDSCH,
• the configuration indicates a second HARQ-ACK reporting mode for second HARQ-ACK information for the second PDSCH, and
• the second HARQ-ACK information is received according to the first HARQ-ACK reporting mode, based on the second HARQ-ACK information being multiplexed with the first HARQ-ACK information in the first PUCCH.