US 11,943,057 B2
Method and apparatus for indicating sidelink hybrid automatic repeat request (HARQ) feedback
Qun Zhao, Beijing (CN)
Assigned to BEIJING XIAOMI MOBILE SOFTWARE CO., LTD., Beijing (CN)
Appl. No. 17/775,499
Filed by BEIJING XIAOMI MOBILE SOFTWARE CO., LTD., Beijing (CN)
PCT Filed Nov. 8, 2019, PCT No. PCT/CN2019/116596
§ 371(c)(1), (2) Date May 9, 2022,
PCT Pub. No. WO2021/087954, PCT Pub. Date May 14, 2021.
Prior Publication US 2022/0385413 A1, Dec. 1, 2022
Int. Cl. H04L 1/1812 (2023.01); H04L 1/1607 (2023.01); H04L 1/1822 (2023.01); H04L 5/00 (2006.01); H04W 76/14 (2018.01)
CPC H04L 1/1812 (2013.01) [H04L 1/1614 (2013.01); H04L 1/1822 (2013.01); H04L 5/0055 (2013.01); H04W 76/14 (2018.02)] 18 Claims
OG exemplary drawing
 
1. A method of indicating a sidelink Hybrid Automatic Repeat reQuest (HARQ) feedback, comprising:
allocating, by a base station, a target resource to a user equipment to perform sidelink communication; and
sending, by the base station, a downlink control signaling to the user equipment, wherein the downlink control signaling comprises the target resource and first indication information; the first indication information is configured for at least one of followings:
in response to determining that the user equipment uses the target resource allocated by the base station to perform sidelink unicast communication, indicating whether to perform the sidelink HARQ feedback;
in response to determining that the user equipment uses the target resource allocated by the base station to perform sidelink multicast communication, indicating whether to perform the sidelink HARQ feedback; or
in response to determining that the user equipment uses the target resource allocated by the base station to perform the sidelink multicast communication, indicating a feedback manner of performing the sidelink HARQ feedback;
wherein the feedback manner indicates feedback operations performed by a data receiving end of the sidelink multicast communication, a data sending end of the sidelink multicast communication being the user equipment, and the feedback manner comprises one of:
feeding back, by the data receiving end, NACK only in response to incorrect reception of data; or
feeding back, by the data receiving end, ACK in response to correct reception of data, and feeding back NACK in response to incorrect reception of data;
wherein the downlink control signaling further comprises second indication information; wherein the second indication information indicates that the sidelink communication performed by the user equipment is the sidelink unicast communication or the sidelink multicast communication; or
the downlink control signaling further comprises third indication information; wherein the third indication information indicates a target address for performing the sidelink communication, and the target address indicates the sidelink communication performed by the user equipment is the sidelink unicast communication or the sidelink multicast communication.