US 11,916,680 B2
Sidelink resource sensing using feedback channels
Chunxuan Ye, San Diego, CA (US); Fengjun Xi, San Diego, CA (US); and Kyle Jung-Lin Pan, Saint James, NY (US)
Assigned to InterDigital Patent Holdings, Inc., Wilmington, DE (US)
Appl. No. 17/421,499
Filed by InterDigital Patent Holdings, Inc., Wilmington, DE (US)
PCT Filed Jan. 9, 2020, PCT No. PCT/US2020/012858
§ 371(c)(1), (2) Date Jul. 8, 2021,
PCT Pub. No. WO2020/146580, PCT Pub. Date Jul. 16, 2020.
Claims priority of provisional application 62/790,139, filed on Jan. 9, 2019.
Prior Publication US 2022/0085923 A1, Mar. 17, 2022
Int. Cl. H04L 1/1825 (2023.01); H04L 1/1607 (2023.01); H04W 72/04 (2023.01)
CPC H04L 1/1825 (2013.01) [H04L 1/1607 (2013.01); H04W 72/04 (2013.01)] 16 Claims
OG exemplary drawing
 
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.