US 11,902,974 B2
Method and apparatus for transmitting and receiving wireless signals in wireless communication system
Youngdae Lee, Seoul (KR); Suckchel Yang, Seoul (KR); and Joonkui Ahn, Seoul (KR)
Assigned to LG ELECTRONICS INC., Seoul (KR)
Filed by LG ELECTRONICS INC., Seoul (KR)
Filed on Sep. 6, 2022, as Appl. No. 17/903,776.
Application 17/903,776 is a continuation of application No. PCT/KR2021/010213, filed on Aug. 4, 2021.
Claims priority of provisional application 63/062,360, filed on Aug. 6, 2020.
Prior Publication US 2023/0049784 A1, Feb. 16, 2023
Int. Cl. H04L 1/1812 (2023.01); H04W 72/1273 (2023.01); H04W 72/23 (2023.01)
CPC H04W 72/1273 (2013.01) [H04L 1/1812 (2013.01); H04W 72/23 (2023.01)] 12 Claims
OG exemplary drawing
 
1. A method for receiving a signal by a user equipment (UE) in a wireless communication system supporting multicast broadcast services (MBSs), the method comprising:
receiving, 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;
receiving, 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;
receiving a first physical downlink shared channel (PDSCH) scheduled by the first DCI;
transmitting HARQ-acknowledgement (ACK) information for the first PDSCH;
receiving, based on a cell-RNTI (C-RNTI), second DCI including a second HARQ process ID field and a second NDI field; and
receiving a second PDSCH scheduled by the second DCI,
wherein, based on the second HARQ process ID field, and the second NDI field, the UE determines that 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 the UE 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.