US 12,356,476 B1
Method and apparatus for remote UE supporting link identifier update procedure in UE-to-UE relay communication in a wireless communication system
Li-Te Pan, Taipei (TW); Li-Chih Tseng, Taipei (TW); and Yu-Hsuan Guo, Taipei (TW)
Assigned to ASUS Technology Licensing Inc., Taipei (TW)
Filed by ASUS Technology Licensing Inc., Taipei (TW)
Filed on Mar. 21, 2025, as Appl. No. 19/086,920.
Claims priority of provisional application 63/568,489, filed on Mar. 22, 2024.
Int. Cl. H04W 76/14 (2018.01); H04W 76/15 (2018.01); H04W 88/04 (2009.01)
CPC H04W 76/14 (2018.02) [H04W 76/15 (2018.02); H04W 88/04 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for a first User Equipment (UE), comprising:
the first UE establishes a PC5 connection with a relay UE for supporting a relay communication between the first UE and a second UE via the relay UE, wherein a direct link context associated with the relay communication includes a first layer-2 Identity (ID) of the second UE;
the first UE initiates a link identifier update (LIU) procedure with the second UE via the relay UE, wherein the first UE receives a LIU response message from the second UE in the LIU procedure, and the LIU response message includes a second layer-2 ID of the second UE; and
the first UE does not update the direct link context with the second layer-2 ID of the second UE.
 
14. A method for a second User Equipment (UE), comprising:
the second UE establishes a PC5 connection with a relay UE for supporting a relay communication between a first UE and the second UE via the relay UE, wherein a direct link context associated with the relay communication includes a first layer-2 Identity (ID) of the first UE;
the second UE performs a link identifier update (LIU) procedure with the first UE via the relay UE, wherein the second UE receives a LIU request message from the first UE in the LIU procedure, and the LIU request message includes a second layer-2 ID of the first UE; and
the second UE does not update the direct link context with the second layer-2 ID of the first UE.