US 12,250,701 B2
User equipment and method for hybrid automatic repeat request reporting
Huei-Ming Lin, South Yarra (AU)
Assigned to GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD., Dongguan (CN)
Filed by GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD., Dongguan (CN)
Filed on Apr. 28, 2022, as Appl. No. 17/731,568.
Application 17/731,568 is a continuation of application No. PCT/CN2020/124711, filed on Oct. 29, 2020.
Claims priority of provisional application 62/928,221, filed on Oct. 30, 2019.
Prior Publication US 2022/0256504 A1, Aug. 11, 2022
Int. Cl. H04W 72/30 (2023.01); H04L 5/00 (2006.01)
CPC H04W 72/30 (2023.01) [H04L 5/0055 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A method for hybrid automatic repeat request (HARQ) reporting of a user equipment (UE), comprising:
determining, by the UE, a hybrid automatic repeat request (HARQ) information in response to one or more transport blocks (TBs) in a received physical sidelink shared channel (PSSCH) in a resource pool; and
selecting a sequence cyclic shift for the HARQ information in a physical sidelink feedback channel (PSFCH) transmission in the resource pool, wherein the sequence cyclic shift is generated according to a pre-configured or network configured initial cyclic shifting value;
wherein the method further comprises:
decoding, by the UE, an associated sidelink control information (SCI) scheduling the received PSSCH, wherein the SCI comprises a HARQ feedback indicator for enabling or disabling a HARQ feedback reporting of the HARQ information from the UE, wherein the HARQ information is given in a positive acknowledgement (ACK)/negative acknowledgement (NACK) representation format comprising a full format of ACK or NACK, or a reduced format of ACK-only or NACK-only;
determining, by the UE, whether to perform the HARQ feedback reporting for the received PSSCH is based on the HARQ feedback indicator in the associated SCI;
wherein the HARQ feedback reporting for the received PSSCH is based on an ACK/NACK representation format;
wherein a selection or determination of the ACK/NACK representation format is based on a group size of a groupcast that serves as a sidelink cast type;
for the groupcast, either the full format or the reduced format is used, a selection of which format to use is based on the group size of the groupcast and/or an indication in the associated SCI;
when the group size of the groupcast is known, the UE selects the full format of ACK or NACK; and
when the group size of the groupcast is larger than a pre-define/fixed value or number of candidate PSFCH resources, the UE follows an ACK/NACK representation format indicated in the associated SCI or selects the reduced format of ACK-only or NACK-only.