Content for TS 29.550 Word version: 18.2.0
1 Scope
2 References
3 Definitions, symbols and abbreviations
3.1 Terms
3.2 Symbols
3.3 Abbreviations
4 Overview
...
...
1 Scope p. 6
The present document specifies the stage 3 protocol and data model for the Nsoraf Service Based Interface. It provides stage 3 protocol definitions and message flows, and specifies the API for each service offered by the SOR-AF.
The 5G System stage 2 architecture and procedures are specified in TS 23.501 and TS 23.502. The stage 2 architecture and procedures for 5G Steering of Roaming are specified in TS 23.122.
The Technical Realization of the Service Based Architecture and the Principles and Guidelines for Services Definition are specified in TS 29.500 and TS 29.501.
2 References p. 6
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.
[1]
TR 21.905: "Vocabulary for 3GPP Specifications".
[2]
TS 23.501: "System Architecture for the 5G System; Stage 2".
[3]
TS 23.502: "Procedures for the 5G System; Stage 2".
[4]
TS 29.500: "5G System; Technical Realization of Service Based Architecture; Stage 3".
[5]
TS 29.501: "5G System; Principles and Guidelines for Services Definition; Stage 3".
[6]
OpenAPI: "OpenAPI 3.0.0 Specification", https://spec.openapis.org/oas/v3.0.0 .
[7]
TR 21.900: "Technical Specification Group working methods".
[8]
TS 33.501: "Security architecture and procedures for 5G system".
[9]
RFC 6749: "The OAuth 2.0 Authorization Framework".
[10]
TS 29.510: "5G System; Network Function Repository Services; Stage 3".
[11]
RFC 9113: HTTP/2.
[12]
RFC 8259: "The JavaScript Object Notation (JSON) Data Interchange Format".
[13]
RFC 9457: "Problem Details for HTTP APIs".
[14]
TS 23.122: "Non-Access-Stratum (NAS) functions related to Mobile Station (MS) in idle mode".
[15]
TS 29.503: "5G System; Unified Data Management Services; Stage 3".
[16]
TS 29.571: "5G System; Common Data Types for Service Based Interfaces Stage 3".
[17]
TS 31.115: "Secured packet structure for (Universal) Subscriber Identity Module (U)SIM Toolkit applications".
[18]
TS 24.501: "Non-Access-Stratum (NAS) protocol for 5G System (5GS); Stage 3".
[19]
TS 29.544: "5G System; Secured Packet Application Function (SP-AF) services; Stage 3".
[20]
TS 29.509: "Authentication Server Services; Stage 3".
3 Definitions, symbols and abbreviations p. 7
3.1 Terms p. 7
SoR Information:
In this specification, this refers to the following HPLMN information:
- an indication of whether the SOR-AF requires the UDM to request an acknowledgement from the UE for successful reception of the Steering of Roaming information; and
-
one of the following:
- a list of preferred PLMN/access technology combinations with an indication that it is included;
- a secured packet with an indication that it is included; or
- the HPLMN indication that 'no change of the "Operator Controlled PLMN Selector with Access Technology" list stored in the UE is needed and thus no list of preferred PLMN/access technology combinations is provided'.
3.2 Symbols p. 7
Void.
3.3 Abbreviations p. 7
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.
JSON
Javascript Object Notation
NF
Network Function
SOR-AF
Steering Of Roaming Application Function
SoR
Steering of Roaming
SUPI
Subscription Permanent Identifier
UDM
Unified Data Management
UE
User Equipment
4 Overview p. 8
4.1 Introduction p. 8
Within the 5GC, the Steering Of Roaming Application Function (SOR-AF) provides services (see TS 23.122) to NF service consumers (e.g. UDM) via the Nsoraf service based interface.
Figure 4.1-1 depicts the reference architecture of the SOR-AF.
