Patent ID: 11902974
Assignee: LG ELECTRONICS INC.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 11:
12. A base station for transmitting a signal in a wireless communication system supporting multicast broadcast services (MBSs), the base station comprising:
a transceiver; and
a processor configured to control the transceiver to:
transmit, through radio resource control (RRC) signaling, configuration information including first information regarding a group-radio network temporary identifier (G-RNTI), and second information regarding whether a hybrid automatic repeat request (HARQ) feedback for multicast is enabled;
transmit, through a physical downlink control channel (PDCCH) based on the G-RNTI, first downlink control information (DCI) including a first hybrid automatic repeat request (HARQ) process ID field and a first new data indicator (NDI) field;
transmit a first physical downlink shared channel (PDSCH) scheduled by the first DCI;
receive HARQ-acknowledgement (ACK) information for the first PDSCH;
transmit, based on a cell-RNTI (C-RNTI), second DCI including a second HARQ process ID field and a second NDI field; and
transmit a second PDSCH scheduled by the second DCI,
wherein, based on the second HARQ process ID field and the second NDI field, the second PDSCH scheduled based on the C-RNTI provides a retransmission of the first PDSCH scheduled based on the G-RNTI,
wherein the second information informs a user equipment that the HARQ-feedback for multicast is DCI-dependently enabled for a MBS associated with the G-RNTI, and
wherein the HARQ-ACK information is provided for only the first PDSCH scheduled by the first DCI, based on (i) the HARQ-feedback for multicast being DCI-dependently enabled through the second information of the RRC message, and (ii) an indicator in the first DCI of the PDCCH indicates enabling of the HARQ-ACK feedback for the first PDSCH.