Trusted Non-3GPP Access Interworking in 3GPP 5G System

3GPP 5G 시스템에서 Trusted Non-3GPP 액세스 연동 기술

  • Kang, Yoohwa (Electronics and Telecommunications Research Institute) ;
  • Kim, Changki (Electronics and Telecommunications Research Institute)
  • Received : 2018.04.16
  • Accepted : 2018.04.21
  • Published : 2018.04.30


A common core network is the one of main architectural principles in 3GPP 5G System which has common interfaces with different multiple accesses. 3GPP 5G System Phase 1 (Release 15) supports Untrusted Non-3GPP access as well as 3GPP access with common interfaces. Non-3GPP Interworking Function (N3IWF) has been defined to interface with a UE and a core network for supporting Untrusted Non-3GPP access in 3GPP Release 15. However, interworking with Trusted Non-3GPP access is under study to be completed in 3GPP 5G System Phase 2 (Release 16). Therefore, this paper proposes a Trusted Non-3GPP access network architecture and related signaling procedures, and then the implementation based on the proposal shows how to interwork between Trusted Non-3GPP access and the 5G core network. In our proposal, N3IWF can interwork with either Untrusted or Trusted Non-3GPP access without any architectural modification or addition of 3GPP 5G system Phase 1.


Grant : 유/무선 액세스에 비종속적인 5G 코어 핵심기술 개발

Supported by : 정보통신기술진흥센터


  1. 3GPP TS 23.501 v15.0.0, "System Architecture for the 5G System; Stage 2," December 2017.
  2. 3GPP TS 23.502 v15.0.0, "Procedures for the 5G System; Stage 2," December 2017.
  3. 3GPP TR 23.716 v0.3.0, "Study on the Wireless and Wireline Convergence for the 5G system architecture," March 2018.
  4. 3GPP TS 23.402 v15.3.0, "Architecture enhancements for non-3GPP access," March 2018.
  5. IETF RFC 7296, "Internet Key Exchange Protocol Version 2 (IKEv2)," October 2014.
  6. IETF RFC 4303, "IP Encapsulating Security Payload (ESP)," December 2005.