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TS 23.501 (SA2)
System Architecture for the 5G System

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V15.4.0 (PDF)2018/12  … p.

5G-EIR (5G-Equipment Identity Register) – AF (Application Function) – AMF (Access and Mobility Management Function) – AUSF (Authentication Server Function) – DN (Data Network) – NEF (Network Exposure Function) – NRF (Network Repository Function) – NSSF (Network Slice Selection Function) – PCF (Policy Control Function) – (R)AN ((Radio) Access Network) – SMF (Session Management Function) – UDM (Unified Data Management) – UDSF (Unstructured Data Storage Function) – UPF (User Plane Function) – UDR (Unified Data Repository) –

Rapporteur:  Ms. Chandramouli, Devaki
See also:  5G-related TS/TR

The present document defines the Stage 2 system architecture for the 5G System. The 5G System provides data connectivity and services. This specification covers both roaming and non-roaming scenarios in all aspects, including interworking between 5GS and EPS, mobility within 5GS, policy control and charging, and authentication. TS 23.502 contains the stage 2 procedures and flows for 5G System and it is a companion specification to this specification.