US 12,245,074 B2
Methods and apparatus directed to non-access stratum procedures in connection with layer 2 relaying
Saad Ahmad, Montreal (CA); Behrouz Aghili, Commack, NY (US); Xiaoyan Shi, Westmount (CA); Samir Ferdi, Kirkland (CA); and Michelle Perras, Montreal (CA)
Assigned to INTERDIGITAL PATENT HOLDINGS, INC., Wilmington, DE (US)
Filed by INTERDIGITAL PATENT HOLDINGS, INC., Wilmington, DE (US)
Filed on Jun. 6, 2024, as Appl. No. 18/736,392.
Application 18/736,392 is a continuation of application No. 17/925,501, previously published as PCT/US2021/033603, filed on May 21, 2021.
Claims priority of provisional application 63/028,554, filed on May 21, 2020.
Prior Publication US 2024/0323754 A1, Sep. 26, 2024
Int. Cl. H04W 28/02 (2009.01); H04W 40/22 (2009.01); H04W 76/23 (2018.01)
CPC H04W 28/0289 (2013.01) [H04W 40/22 (2013.01); H04W 76/23 (2018.02)] 16 Claims
OG exemplary drawing
 
1. A first wireless transmit/receive unit (WTRU) comprising circuitry, including a transmitter, a receiver, a processor and memory, configured to:
receive, from a second WTRU, a first PC5 sidelink transmission comprising a first link release message, wherein the first link release message comprises a first backoff timer value and a cause value indicating congestion, and wherein the second WTRU is a first relay WTRU;
release the connection with the second WTRU and initiate a backoff timer associated with the second WTRU based on the received first backoff timer value;
determine to connect to a third WTRU based on a second PC5 sidelink transmission comprising a first discovery message from the third WTRU, wherein the third WTRU is a second relay WTRU;
establish a PC5 sidelink connection to the third WTRU;
receive, from the third WTRU, a third PC5 sidelink transmission comprising a second link release message;
release the connection with the third WTRU;
determine to connect to a fourth WTRU based on a fourth PC5 sidelink transmission comprising a second discovery message from the fourth WTRU; and
on condition that the fourth WTRU is the same WTRU as the second WTRU, refrain from establishing a PC5 connection to the second WTRU on condition that the backoff timer associated with the second WTRU has not expired.