Patent ID: 11870586
Assignee: LG ELECTRONICS INC.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 15:
16. A processing device adapted to control a first device performing groupcast communication with one or more devices in a group, the processing device comprising:
at least one processor; and
at least one memory connected to the at least one processor and storing instructions that, based on being executed by the at least one processor, perform operations comprising:
determining a number of physical sidelink feedback channel (PSFCH) resources related to a physical sidelink shared channel (PSSCH) resource;
determining that a size of the group is greater than the number of PSFCH resources by comparing the number of PSFCH resources and the size of the group;
selecting, based on the determination that the size of the group is greater than the number of PSFCH resources, negative-only hybrid automatic repeat request (HARQ) feedback among the negative-only HARQ feedback and positive-negative HARQ feedback;
transmitting, to the one or more devices, information regarding the negative-only HARQ feedback;
transmitting, to the one or more devices, data based on the PSSCH resource; and
receiving negative acknowledgement (NACK) from at least one second device, based on failure of decoding of the data by the at least one second device among the one or more devices.