# US 12,114,153 B2 · Authentication for relay > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,114,153 B2 - Document ID: US12114153B2 - Status: Granted - Kind: B2 - Application number: 17/635,998 - Filed: 2020-08-19 - Published: 2022-09-01 - Granted: 2024-10-08 - Earliest claimed: 2019-08-19 - Assignees: LG Electronics Inc. - Applicants: LG Electronics Inc. - Inventors: Myungjune Youn; Laeyoung Kim - Web page: https://patentgrep.com/patent/US12114153B2 ## CPC - H04W 12/06: Authentication - H04W 76/11: Allocation or use of connection identifiers - H04W 8/20: Transfer of user or subscriber data - H04W 12/72: Subscriber identity - H04W 60/00: Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration - H04L 63/0884: {by delegation of authentication, e.g. a proxy authenticates an entity to be authenticated on behalf of this entity vis-à-vis an authentication entity} - H04L 63/0892: {by using authentication-authorization-accounting [AAA] servers or protocols} - H04W 8/26: Network addressing or numbering for mobility support - H04W 76/14: Direct-mode setup - H04W 76/30: Connection release - H04W 88/04: adapted for relaying to or from another terminal or user - H04W 92/18: between terminal devices - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract One disclosure of the present specification provides a method for an SMF node to perform authentication. The method may include the steps of: receiving, from a relay UE, a Remote UE report message related to a Remote UE connected to the relay UE; transmitting a request message to a UDM node or an AMF node on the basis of the Remote UE report message including an SUCI of the remote unit; receiving a response message, including an SUPI of the Remote UE, from the UDM node or the AMF node; and transmitting an authentication request message, requesting authentication for the Remote UE, to an authentication server. ## Claims ### Claim 1 A method for a Session Management Function (SMF) node to perform authentication, comprising: receiving a Remote User Equipment (UE) report message related to a remote UE connected to a relay UE from the relay UE; transmitting a request message to a unified data management (UDM) node or an access and mobility management function (AMF) node, based on that the Remote UE report message includes a Subscription Concealed Identifier (SUCI) of the remote UE; receiving, from the UDM node or the AMF node, a response message including a Subscription Permanent Identifier (SUPI) of the remote UE, in response to the request message; and transmitting an authentication request message requesting authentication for the remote UE to an authentication server, based on that the Remote UE report message is received, wherein the authentication request message includes a SUPI of the remote UE. ### Claim 2 (depends on 1) The method of claim 1, further comprising: receiving a response message including information on the authentication result for the remote UE, in response to the authentication request message from the authentication server. ### Claim 3 (depends on 2) The method of claim 2, further comprising: transmitting a response message including information on the authentication result for the remote UE to the relay UE. ### Claim 4 (depends on 1) The method of claim 1, further comprising: receiving, from the UDM node, the subscription data of the remote UE. ### Claim 5 (depends on 4) The method of claim 4, further comprising: determining whether to perform authentication for the remote UE, based on the subscription data of the Remote-remote UE. ### Claim 6 (depends on 5) The method of claim 5, when authentication for the remote UE is determined to be performed, the authentication request message is transmitted to the authentication server. ### Claim 7 A method for a relay User Equipment (UE) to perform authentication, comprising: receiving a direct communication request message from the Remote a remote UE; transmitting a Remote UE report message to a Session Management Function (SMF) node, based on the direct communication request message being received; and receiving a message including an authentication result for the remote UE from the SMF node, wherein the direct communication request message includes Remote UE ID information of the remote UE, wherein the Remote UE ID information includes a Subscription Concealed Identifier (SUCI) of the remote UE, wherein the SUCI of the remote UE is used by the SMF node to obtain a Subscription Permanent Identifier (SUPI) of the remote UE. ### Claim 8 (depends on 7) The method of claim 7, wherein the SUPI of the remote UE is included in an authentication request message for the remote UE that to be transmitted by the SMF node to an authentication server. ### Claim 9 (depends on 7) The method of claim 7, further comprising: when the authentication result for the remote UE includes information indicating that authentication for the remote UE has failed or a request to stop the service of the remote UE, releasing the connection between the remote UE and the relay UE. ### Claim 10 (depends on 9) The method of claim 9, wherein the connection between the remote UE and the relay UE is a PC5 link. ### Claim 11 (depends on 7) The method of claim 7, further comprising: transmitting a Remote UE registration request message to an access and mobility management function (AMF) node; and receiving a Remote UE registration accept message from the AMF node, in response to the Remote UE registration request message. ### Claim 12 A relay User Equipment (UE) that performs authentication, the relay UE comprising: at least one processor; and at least one memory storing instructions and operably electrically connectable with the at least one processor, wherein the operations performed based on the execution of the instructions by the at least one processor include: receiving a direct communication request message from a remote UE; transmitting a Remote UE report message to a Session Management Function (SMF) node, based on the direct communication request message being received; and receiving a message including an authentication result for the remote UE from the SMF node, wherein the direct communication request message includes Remote UE ID information of the remote UE, wherein the Remote UE ID information includes a Subscription Concealed Identifier (SUCI) of the remote UE, wherein the SUCI of the remote UE is used by the SMF node to obtain a Subscription Permanent Identifier (SUPI) of the Remote remote UE. ### Claim 13 (depends on 12) The relay UE of claim 12, wherein the relay UE is an autonomous driving device that communicates with at least one of a mobile terminal, a network, and an autonomous vehicle other than the relay UE.