The present document defines the Stage 2 architecture, procedures, flows and Network Function Services for User Data Interworking, Coexistence and Migration within the 5G System.
The following documents contain provisions which, through reference in this text, constitute provisions of the present document.
References are either specific (identified by date of publication, edition number, version number, etc.) or non specific.
For a specific reference, subsequent revisions do not apply.
For a non-specific reference, the latest version applies. In the case of a reference to a 3GPP document (including a GSM document), a non-specific reference implicitly refers to the latest version of that document in the same Release as the present document.
 TR 21.905
"Vocabulary for 3GPP Specifications".
 TS 23.501
"System Architecture for the 5G System; Stage 2".
 TS 23.002
 TS 23.380
"IMS Restoration Procedures".
 TS 23.502
"Procedures for the 5G System; Stage 2".
 TS 33.501
"Security Architecture and Procedures for 5G System".
 TS 23.228
"IP Multimedia Subsystem (IMS); Stage 2".
 TS 33.401
"3GPP System Architecture Evolution (SAE); Security architecture".
 TS 33.402
"3GPP System Architecture Evolution (SAE); Security aspects of non-3GPP accesses".
 TS 33.203
"3G security; Access security for IP-based services".
 TS 33.220
"3G security; Generic Authentication Architecture (GAA); Generic Bootstrapping Architecture (GBA)".
 TS 24.080
"Mobile radio interface layer 3 supplementary services specification - Formats and coding".
 TS 23.237
"IP Multimedia Subsystem (IMS) Service Continuity".
 TS 23.008
"Organization of subscriber data".
 TS 29.328
"IP Multimedia (IM) Subsystem Sh interface; Signalling flows and message contents".
 TS 23.682
"Architecture enhancements to facilitate communications with packet data networks and applications; Stage 2".
 TS 23.040
"Technical realization of the Short Message Service (SMS)".
 TS 23.204
"Support of Short Message Service (SMS) over generic 3GPP Internet Protocol (IP) access; Stage 2".
For the purposes of the present document, the terms given in TR 21.905
and the following apply. A term defined in the present document takes precedence over the definition of the same term, if any, in TR 21.905
For the purposes of the present document, the abbreviations given in TR 21.905
and the following apply. An abbreviation defined in the present document takes precedence over the definition of the same abbreviation, if any, in TR 21.905
5G Unified Data Repository
EPS User Data Repository