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Content for  TS 29.559  Word version:  18.2.0

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1  Scopep. 7

The present document specifies the stage 3 protocol and data model for the Npkmf Service Based Interface. It provides stage 3 protocol definitions and message flows, and specifies the API for each service offered by the 5G PKMF as specified in TS 33.503.
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 33.503: "Security Aspects of Proximity based Services (ProSe) in the 5G System (5GS)".
[5]
TS 29.500: "5G System; Technical Realization of Service Based Architecture; Stage 3".
[6]
TS 29.501: "5G System; Principles and Guidelines for Services Definition; Stage 3".
[7]
OpenAPI : "OpenAPI Specification Version 3.0.0", https://spec.openapis.org/oas/v3.0.0.
[8]
RFC 9113:  "HTTP/2".
[9]
RFC 8259:  "The JavaScript Object Notation (JSON) Data Interchange Format".
[10]
RFC 9457:  "Problem Details for HTTP APIs".
[11]
TS 33.501: "Security architecture and procedures for 5G system".
[12]
RFC 6749:  "The OAuth 2.0 Authorization Framework".
[13]
TS 29.510: "Network Function Repository Services; Stage 3".
[14]
TR 21.900: "Technical Specification Group working methods".
[15]
TS 29.571: "5G System; Common Data Types for Service Based Interfaces; Stage 3".
[16]
TS 24.554: "Proximity-services (ProSe) in 5G System (5GS) protocol aspects; Stage 3".
[17]
TS 29.503: "5G System; Unified Data Management Services; Stage 3".
[18]
TS 29.509: "5G System; Authentication Server Services; Stage 3".
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3  Definitions of terms, symbols and abbreviationsp. 8

3.1  Termsp. 8

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.

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.
5G PKMF
5G ProSe Key Management Function
5G ProSe
5G Proximity based Services
RPAUID
Restricted ProSe Application User ID
PDUID
ProSe Discovery UE ID
UP-PRUK
User Plane ProSe Remote User Key
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4  Overviewp. 8

The 5G ProSe Key Management Function (5G PKMF) is the logical function handling network related actions required for the key management and the security material for discovery of a 5G ProSe UE-to-Network Relay by a 5G ProSe Remote UE, for establishing a secure PC5 communication link between a 5G ProSe Remote UE and 5G ProSe UE-to-Network Relay, for discovery of a 5G ProSe UE-to-UE Relay by a 5G ProSe End UE, and for establishing a secure PC5 communication link between a 5G ProSe End UE and a 5G ProSe UE-to-UE Relay (see TS 33.503).
Figure 4-1 provides the reference model (in service based interface representation and in reference point representation), with focus on the 5G PKMF:
Reproduction of 3GPP TS 29.559, Fig. 4-1: Reference model - 5G PKMF
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The functionalities supported by the 5G PKMF are listed in clause 4.2.1.2 of TS 33.503.

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