ETSI - TS 123 501
5G; System architecture for the 5G System (5GS)
|Publication Date:||1 April 2021|
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, QoS, policy control and charging, authentication and in general 5G System wide features e.g. SMS, Location Services, Emergency Services.
ITU-T Recommendation I.130  describes a three-stage method for characterisation of telecommunication services, and ITU-T Recommendation Q.65  defines Stage 2 of the method.
TS 23.502  contains the stage 2 procedures and flows for 5G System and it is a companion specification to this specification.
TS 23.503  contains the stage 2 Policy Control and Charging architecture for 5G System and it is a companion specification to this specification.