Patent ID: 11956798
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 4:
5. A method performed by a base station in a communication system, the method comprising:
transmitting, to a terminal, configuration information on a semi-persistent scheduling (SPS) for a multicast;
transmitting, to the terminal, first downlink control information (DCI) for activating the SPS;
transmitting, to the terminal, a first SPS physical downlink shared channel (PDSCH) after an activation of the SPS corresponding to the configuration information and the first DCI;
receiving, from the terminal, hybrid automatic repeat request acknowledgement (HARQ-ACK) information corresponding to the first SPS PDSCH associated with a first feedback scheme;
transmitting, to the terminal, a second SPS PDSCH; and
identifying HARQ-ACK information corresponding to the second SPS PDSCH associated with a second feedback scheme is received from the terminal,
wherein the first feedback scheme is a feedback type that a terminal generates ACK or NACK as HARQ-ACK information and the second feedback scheme is a feedback type that a terminal generates only NACK as HARQ-ACK information.