Patent ID: 11916680
Assignee: INTERDIGITAL PATENT HOLDINGS, INC.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A wireless transmit and receive unit (WRTU), comprising:
a processor configured to:
determine that data is to be transmitted via a sidelink transmission;
select sidelink unicast or sidelink groupcast to transmit the data;
on condition that sidelink groupcast is selected to transmit the data, select Hybrid Automatic Repeat Request (HARQ) Negative Acknowledgement (NACK) feedback or HARQ Acknowledgement/Negative Acknowledgement (ACK/NACK) feedback based upon one or more of: a number of WTRUs to receive the data, a condition of a channel associated with transmission of the data, or a quality of service associated with transmission of the data;
select a first Physical Sidelink Feedback Channel (PSFCH) format or a second PSFCH format based upon one or more of: the selected sidelink unicast or sidelink groupcast, HARQ NACK feedback or HARQ ACK/NACK feedback being selected, or a quality of service associated with transmission of the data;
select the first PSFCH format if sidelink unicast is selected, HARQ ACK/NACK feedback is selected, and the quality of service associated with transmission of the data is other than high reliability; and
transmit, using the selected sidelink unicast or sidelink groupcast, the data, and information indicating the selected first PSFCH format or second PSFCH format, and information indicating one of HARQ NACK feedback or HARQ ACK/NACK feedback.