US 11,956,798 B2
Method and apparatus for grant-free data transmission in wireless communication system
Sungjin Park, Suwon-si (KR); Youngbum Kim, Suwon-si (KR); Hyunseok Ryu, Suwon-si (KR); and Jeongho Yeo, Suwon-si (KR)
Assigned to Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed by Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed on Oct. 19, 2021, as Appl. No. 17/505,054.
Claims priority of application No. 10-2020-0135145 (KR), filed on Oct. 19, 2020; and application No. 10-2021-0127967 (KR), filed on Sep. 28, 2021.
Prior Publication US 2022/0124783 A1, Apr. 21, 2022
Int. Cl. H04W 72/12 (2023.01); H04L 1/1812 (2023.01); H04L 1/1867 (2023.01); H04W 72/121 (2023.01); H04W 72/23 (2023.01)
CPC H04W 72/23 (2023.01) [H04L 1/1812 (2013.01); H04L 1/1887 (2013.01); H04W 72/121 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A method performed by a terminal in a communication system, the method comprising:
receiving, from a base station, configuration information on a semi-persistent scheduling (SPS) for a multicast;
in case that first downlink control information (DCI) for activating the SPS is received from the base station, receiving, from the base station, a first SPS physical downlink shared channel (PDSCH) after an activation of the SPS based on the configuration information and the first DCI;
identifying hybrid automatic repeat request acknowledgement (HARQ-ACK) information corresponding to the first SPS PDSCH according to a first feedback scheme;
receiving, from the base station, a second SPS PDSCH; and
identifying HARQ-ACK information corresponding to the second SPS PDSCH according to a second feedback scheme,
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.