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Content for  TS 29.544  Word version:  17.3.0

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1  Scopep. 7

The present document specifies the stage 3 protocol and data model for the Nspaf Service Based Interface. It provides stage 3 protocol definitions and message flows, and specifies the API for each service offered by the SP-AF.
The 5G System stage 2 architecture and procedures are specified in TS 23.501 and TS 23.502.
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.
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2  Referencesp. 7

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 Specification Version 3.0.0", 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 7540:  "Hypertext Transfer Protocol Version 2 (HTTP/2)".
[12]
RFC 8259:  "The JavaScript Object Notation (JSON) Data Interchange Format".
[13]
RFC 7807:  "Problem Details for HTTP APIs".
[14]
TS 29.503: "Unified Data Management Services"; Stage 3.
[15]
TS 29.571: "5G System; Common Data Types for Service Based Interfaces Stage 3".
[16]
TS 31.115: "Secured packet structure for (Universal) Subscriber Identity Module (U)SIM Toolkit applications".
[17]
TS 29.509: "Authentication Server Services; Stage 3".
[18]
TS 23.040: "Technical realization of the Short Message Service (SMS)"
[19]
TS 24.501: "Non-Access-Stratum (NAS) protocol for 5G System (5GS); Stage 3".
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3  Definitions, symbols and abbreviationsp. 8

3.1  Termsp. 8

Void.

3.2  Symbolsp. 8

Void.

3.3  Abbreviationsp. 8

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.
OTA
Over The Air
SOR-AF
Steering Of Roaming Application Function
SP-AF
Secured Packet Application Function
UDM
Unified Data Management

4  Overviewp. 8

4.1  Introductionp. 8

Within the 5GC, the SP-AF offers services to the UDM and to the SOR-AF via the Nspaf service based interface.
The UDM or SOR-AF shall make use of the SP-AF services when it needs to protect UE parameters for which the final consumer is the USIM (see TS 33.501, clause 6.15.2.1).
Figure 4.1-1 provides the reference model with focus on the SP-AF.
Copy of original 3GPP image for 3GPP TS 29.544, Fig. 4.1-1: Reference model - SP-AF
Figure 4.1-1: Reference model - SP-AF
(⇒ copy of original 3GPP image)
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