US 11,871,465 B2
Method and apparatus for establishing sidelink radio bearer for UE-to-UE relay communication in a wireless communication system
Li-Te Pan, Taipei (TW); Li-Chih Tseng, Taipei (TW); and Richard Lee-Chee Kuo, Taipei (TW)
Assigned to ASUSTek Computer Inc., Taipei (TW)
Filed by ASUSTek Computer Inc., Taipei (TW)
Filed on Jun. 24, 2021, as Appl. No. 17/357,404.
Claims priority of provisional application 63/173,061, filed on Apr. 9, 2021.
Claims priority of provisional application 63/057,138, filed on Jul. 27, 2020.
Claims priority of provisional application 63/046,901, filed on Jul. 1, 2020.
Prior Publication US 2022/0007445 A1, Jan. 6, 2022
Int. Cl. H04W 76/15 (2018.01); H04L 69/22 (2022.01); H04W 40/22 (2009.01)
CPC H04W 76/15 (2018.02) [H04L 69/22 (2013.01); H04W 40/22 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A method for a first User Equipment (UE), comprising:
establishing a Sidelink (SL) Data Radio Bearer (DRB) for transmission to a second UE directly or via a relay UE, wherein a configuration of the SL DRB is identified by a configuration index, and the SL DRB is mapped to a SL Radio Link Control (RLC) channel established between the first UE and the second UE or between the first UE and the relay UE, and wherein the SL RLC channel is identified by a logical channel identity (LCID);
ciphering, using at least the LCID as input to ciphering algorithm, a sidelink packet to be sent to the second UE on the SL DRB if the SL DRB is established for transmission to the second UE directly; and
ciphering, using at least the configuration index as input to ciphering algorithm, the sidelink packet to be sent to the second UE on the SL DRB if the SL DRB is established for transmission to the second UE via the relay UE.