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Content for  TS 29.540  Word version:  17.6.0

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1  Scopep. 6

The present document specifies the stage 3 protocol and data model for the Nsmsf Service Based Interface. It provides stage 3 protocol definitions and message flows, and specifies the API for each service offered by the SMSF.
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.

2  Referencesp. 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.
TR 21.905: "Vocabulary for 3GPP Specifications".
TS 23.501: "System Architecture for the 5G System; Stage 2".
TS 23.502: "Procedures for the 5G System; Stage 2".
TS 29.500: "5G System; Technical Realization of Service Based Architecture; Stage 3".
TS 29.501: "5G System; Principles and Guidelines for Services Definition; Stage 3".
TS 29.571: "5G System; Common Data Types for Service Based Interfaces; Stage 3".
RFC 7540:  "Hypertext Transfer Protocol Version 2 (HTTP/2)".
RFC 8259:  "The JavaScript Object Notation (JSON) Data Interchange Format".
RFC 2387:  "The MIME Multipart/Related Content-type".
RFC 2045:  "Multipurpose Internet Mail Extensions (MIME) Part One: Format of Internet Message Bodies".
TS 23.040: "Technical realization of the Short Message Service (SMS)".
TS 24.011: "Point-to-Point (PP) Short Message Service (SMS) support on mobile radio interface".
TS 33.501: "Security architecture and procedures for 5G system".
RFC 6749:  "The OAuth 2.0 Authorization Framework".
TS 29.510: "Network Function Repository Services; Stage 3".
TR 21.900: "Technical Specification Group working methods".
RFC 7807:  "Problem Details for HTTP APIs".
RFC 7232:  "Hypertext Transfer Protocol (HTTP/1.1): Conditional Requests".
OpenAPI: "OpenAPI Specification Version 3.0.0",
RFC 6902:  "JavaScript Object Notation (JSON) Patch".
TS 23.540: "5G System; Technical realization of Service Based Short Message Service Stage 2".
TS 29.577: "5G System; IP Short Message Gateway and SMS Router For Short Message Services Stage 3".

3  Definitions and abbreviationsp. 7

3.1  Definitionsp. 7

For the purposes of the present document, the terms and definitions 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.

3.2  Abbreviationsp. 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.
5G Core Network
Access Management Function
Javascript Object Notation
SMS Function

4  Overviewp. 7

Within the 5GC, the SMSF offers services to the AMF, SMS-GMSC, IP-SM-GW and SMS Router via the Nsmsf service based interface (see TS 23.501, TS 23.502 and TS 23.540).
Figure 4-1 provides the reference model (in service based interface representation and in reference point representation), with focus on the SMSF and the scope of the present specification.
Copy of original 3GPP image for 3GPP TS 29.540, Fig. 4-1: Reference model - SMSF
Figure 4-1: Reference model - SMSF
(⇒ copy of original 3GPP image)
The functionalities supported by the SMSF are listed in clause 6.2.13 of TS 23.501.
The services and service operations provided by the Nsmsf interface are listed in clause 5.2.9 of TS 23.502 and clause 6.4 of TS 23.540.

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