US 12,457,114 B2
Relay UE and remote UE authorization
Zhang Fu, Stockholm (SE); Monica Wifvesson, Lund (SE); Shabnam Sultana, Montreal (CA); and Juying Gan, Shanghai (CN)
Assigned to Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
Appl. No. 18/031,183
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
PCT Filed Oct. 11, 2021, PCT No. PCT/IB2021/059294
§ 371(c)(1), (2) Date Apr. 11, 2023,
PCT Pub. No. WO2022/079572, PCT Pub. Date Apr. 21, 2022.
Claims priority of application No. PCT/CN2020/120324 (WO), filed on Oct. 12, 2020.
Prior Publication US 2023/0379168 A1, Nov. 23, 2023
Int. Cl. H04L 9/40 (2022.01); H04L 9/32 (2006.01); H04W 12/06 (2021.01); H04W 16/26 (2009.01)
CPC H04L 9/3247 (2013.01) [H04L 9/3213 (2013.01); H04W 12/06 (2013.01); H04W 16/26 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A method performed by a relay user equipment (UE) for determining whether the relay UE is authorized to provide a relay service to a remote UE, the method comprising:
the relay UE receiving from the remote UE a first message comprising a first authorization token and a first digital signature for verifying the authenticity of the first authorization token, wherein the first digital signature was generated by a first network function implemented in a network using the first authorization token and a first key, and the first authorization token indicates whether or not the remote UE is authorized to utilize a relay service provided by the relay UE;
the relay UE verifying the authenticity of the first authorization token; and
the relay UE transmitting to the remote UE a second message comprising a second authorization token and a second digital signature for verifying the authenticity of the second authorization token, wherein
the second digital signature was generated by a second network function implemented in the network or the first network function, and
the second authorization token indicates that the relay UE is authorized to provide a relay service to the remote UE.