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KR-102963827-B1 - METHOD AND APPARATUS FOR SUPPORTING NETWORK ASSISTANCE SECURITY ESTABLISHMENT IN UE-TO-UE RELAY IN A WIRELESS COMMUNICATION SYSTEM

KR102963827B1KR 102963827 B1KR102963827 B1KR 102963827B1KR-102963827-B1

Abstract

A method and device for a relay user terminal (User Equipment; UE) are disclosed. In one embodiment, the relay UE receives a first direct communication request message from a source end UE to establish UE-to-UE (UE-to-UE; U2U) relay communication with a target end UE. The relay UE also transmits a second direct communication request message to the target end UE in a direct link establishment procedure used to establish a direct link to support U2U relay communication. The relay UE further receives a direct communication security request message from the target end UE to trigger the relay UE to perform a key request procedure with a network. Additionally, the relay UE transmits a direct communication security refusal message to the target end UE if the key request procedure with the network fails. Additionally, the relay UE stops the direct link establishment procedure after transmitting the direct communication security refusal message.

Inventors

  • 판, 리-테

Assignees

  • 아서스 테크놀러지 라이센싱 아이엔씨.

Dates

Publication Date
20260513
Application Date
20241217
Priority Date
20231226

Claims (12)

  1. As a method for a relay user terminal (User Equipment; UE), The step of the relay UE receiving a first direct communication request message from the source end UE to establish UE-to-UE (UE-to-UE; U2U) relay communication with the target end UE; A step of transmitting a second direct communication request message to the target end UE in a direct link setup procedure used to establish a direct link for the relay UE to support the U2U relay communication; The step of the relay UE receiving a direct communication security request message from the target end UE to trigger the relay UE to perform a network and key request procedure; The step of the relay UE sending a direct communication security refusal message to the target end UE when the key request procedure with the network fails; and A method comprising the step of stopping the direct link establishment procedure after the relay UE transmits the direct communication security refusal message.
  2. In paragraph 1, The above method is, A method further comprising the step of transmitting a first direct communication refusal message to the source end UE after the relay UE has stopped the direct link establishment procedure.
  3. In paragraph 2, The above first direct communication refusal message corresponds to the above first direct communication request message, a method.
  4. In paragraph 2, The above-mentioned first direct communication rejection message is a PROSE DIRECT LINK ESTABLISHMENT REJECT message, a method.
  5. In paragraph 1, A method wherein the second direct communication request message comprises, at least, a relay service code associated with a network assistance security indicator indicating that security procedures using network assistance are required.
  6. In paragraph 1, A method in which the first direct communication request message or the second direct communication request message is a PROSE DIRECT LINK ESTABLISHMENT REQUEST message, the direct communication security request message is a PROSE DIRECT LINK SECURITY ESTABLISHMENT REQUEST message, or the direct communication security rejection message is a PROSE DIRECT LINK SECURITY ESTABLISHMENT REJECT message.
  7. As a relay user terminal (User Equipment; UE), Control circuit; A processor installed within the above control circuit; and It includes a memory installed within the above-mentioned control circuit and operably coupled to the above-mentioned processor, and The above processor is configured to execute program code stored in the memory: Receive a first direct communication request message from a source end UE to establish UE-to-UE (UE-to-UE; U2U) relay communication with a target end UE; In a direct link setup procedure used to establish a direct link to support the above U2U relay communication, a second direct communication request message is transmitted to the target end UE; Receiving a direct communication security request message from the target end UE to trigger the relay UE to perform a network and key request procedure; If the key request procedure with the above network fails, a direct communication security refusal message is sent to the above target end UE; and A relay UE that stops the direct link setup procedure after transmitting the direct communication security rejection message.
  8. In Paragraph 7, The above processor is additionally configured to execute program code stored in the memory: A relay UE that transmits a first direct communication refusal message to the source end UE after stopping the above direct link setup procedure.
  9. In paragraph 8, The above first direct communication refusal message corresponds to the above first direct communication request message, relay UE.
  10. In paragraph 8, The above first direct communication rejection message is a relay UE, which is a PROSE DIRECT LINK ESTABLISHMENT REJECT message.
  11. In Paragraph 7, The above second direct communication request message comprises, at least, a relay UE including a relay service code associated with a network assistance security indicator indicating that security procedures using network assistance are required.
  12. In Paragraph 7, A relay UE in which the first direct communication request message or the second direct communication request message is a PROSE DIRECT LINK ESTABLISHMENT REQUEST message, the direct communication security request message is a PROSE DIRECT LINK SECURITY ESTABLISHMENT REQUEST message, or the direct communication security rejection message is a PROSE DIRECT LINK SECURITY ESTABLISHMENT REJECT message.

Description

Method and apparatus for supporting network assistance security establishment in UE-to-UE relay in a wireless communication system Cross-reference regarding related applications This application claims the benefit of U.S. provisional application serial number 63/614,718 filed December 26, 2023, the entire disclosure of which is incorporated herein by reference in its entirety. Technology field The present disclosure relates generally to wireless communication networks, and more specifically to a method and apparatus for supporting network auxiliary security settings in a UE-to-UE relay in a wireless communication system. As the demand for high-volume data communication to and from mobile communication devices surges, traditional mobile voice communication networks are evolving into networks that communicate using Internet Protocol (IP) data packets. This IP data packet communication can provide users of mobile communication devices with voice over IP, multimedia, multicast, and on-demand communication services. An exemplary network structure is the Evolved Universal Terrestrial Radio Access Network (E-UTRAN). E-UTRAN systems can provide high data throughput to realize the Internet telephony and multimedia services mentioned above. New wireless technologies for the next generation (e.g., 5G) are currently being discussed by the 3GPP standards organization. Accordingly, changes to the current body of the 3GPP standards are currently being proposed and reviewed to advance and finalize the 3GPP standards. A method and device for a relay user terminal (User Equipment; UE) are disclosed. In one embodiment, the relay UE receives a first direct communication request message from a source end UE to establish UE-to-UE (UE-to-UE; U2U) relay communication with a target end UE. The relay UE also transmits a second direct communication request message to the target end UE in a direct link establishment procedure used to establish a direct link to support U2U relay communication. The relay UE further receives a direct communication security request message from the target end UE to trigger the relay UE to perform a key request procedure with a network. Additionally, the relay UE transmits a direct communication security refusal message to the target end UE if the key request procedure with the network fails. Additionally, the relay UE stops the direct link establishment procedure after transmitting the direct communication security refusal message. FIG. 1 illustrates a drawing of a wireless communication system according to an exemplary embodiment. FIG. 2 is a block diagram of a transmitter system (also known as an access network) and a receiver system (also known as a user terminal or UE) according to an exemplary embodiment. FIG. 3 is a functional block diagram of a communication system according to an exemplary embodiment. FIG. 4 is a functional block diagram of the program code of FIG. 3 according to an exemplary embodiment. Figure 5 is a reproduction of Figure 16.12.2.x-1 of 3GPP R2-2314074 and Figure 6.4.3.1-1 of 3GPP TS 23.304 V18.4.0. Figure 6 is a reproduction of Figure 16.12.2.x-2 of 3GPP R2-2314074 and Figure 6.7.1.1-1 of 3GPP TS 23.304 V18.4.0. Figure 7 is a reproduction of Figure 16.12.x-1 of 3GPP R2-2314074 and Figure 7.2.2.2.1 of 3GPP TS 24.554 V18.2.0. Figure 8 is a reproduction of Figure 5.8.9.1.1-1 of 3GPP R2-2314014 and Figure 7.2.2.2.2 of 3GPP TS 24.554 V18.2.0. Figure 9 is a reproduction of Figure 5.8.9.1.1-2 of 3GPP R2-2314014 and Figure 7.2.10.2.1 of 3GPP TS 24.554 V18.2.0. Figure 10 is a reproduction of Figure 5.8.9.8.1-1 of 3GPP R2-2314014 and Figure 8.2.10.2.4.2.1 of 3GPP TS 24.554 V18.2.0. Figure 11 is a reproduction of Figure 6.3.3.2.2-1 of 3GPP TS 33.503 V18.0.0. Figure 12 is a reproduction of Figure 6.6.3.1-1 of 3GPP TS 33.503 V18.0.0. Figure 13 is a reproduction of Figure 8a.2.x.2.1 of 3GPP C1-238124. FIG. 14 illustrates an example of a step flow for PC5 security configuration for U2U relay communication that does not use network assistance based on related standards according to an exemplary embodiment. FIG. 15a illustrates an example of a step flow for a successful PC5 security setup for U2U relay communication using network assistance based on relevant standards according to an exemplary embodiment. FIG. 15b illustrates an example of a step flow of an unsuccessful PC5 security configuration for U2U relay communication using network assistance based on related standards according to an exemplary embodiment. FIG. 16 illustrates an example of a potential future direction for subsequent actions following the transmission of a direct communication security refusal according to an exemplary embodiment. FIG. 17 illustrates an example of a potential issue according to an exemplary embodiment. FIG. 18 illustrates an example of a possible solution for solving the issue illustrated in FIG. 17 according to an exemplary embodiment. FIG. 19 is a flowchart according to an exemplary embodiment. FIG. 20 i