Content for  TS 29.503  Word version:  18.4.0

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1  Scopep. 23

The present document specifies the stage 3 protocol and data model for the Nudm Service Based Interface. It provides stage 3 protocol definitions and message flows, and specifies the API for each service offered by the UDM.
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. 23

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 33.501: "Security Architecture and Procedures for 5G System".
TS 29.571: "5G System; Common Data Types for Service Based Interfaces Stage 3".
TS 23.003: "Numbering, addressing and identification".
TS 29.504: "5G System; Unified Data Repository Services; Stage 3".
TS 29.505: "5G System; Usage of the Unified Data Repository Services for Subscription Data; Stage 3".
TS 32.255: "Charging management; 5G data connectivity domain charging".
TS 32.298: "Charging management; Charging Data Record (CDR) parameter description".
RFC 9113:  "HTTP/2".
OpenAPI Initiative, "OpenAPI Specification Version 3.0.0",
RFC 8259:  "The JavaScript Object Notation (JSON) Data Interchange Format".
RFC 9457:  "Problem Details for HTTP APIs".
RFC 7396:  "JSON Merge Patch".
RFC 6749:  "The OAuth 2.0 Authorization Framework".
TS 29.510: "Network Function Repository Services; Stage 3".
TS 23.122: "Non-Access-Stratum (NAS) functions related to Mobile Station in idle mode".
TS 29.002: "Mobile Application Part (MAP) specification".
TS 29.338: "Diameter based protocols to support Short Message Service (SMS) capable Mobile Management Entities (MMEs)"
ITU-T Recommendation E.164: "The international public telecommunication numbering plan".
TS 29.509: "Authentication Server Services; Stage 3".
[25]  Void
RFC 9111:  "HTTP Caching".
TS 24.501: "Non-Access-Stratum (NAS) protocol for 5G System (5GS); Stage 3".
ETSI TS 102 225: "Smart Cards; Secured packet structure for UICC based applications".
RFC 7542:  "The Network Access Identifier".
TR 21.900: "Technical Specification Group working methods".
RFC 3986:  "Uniform Resource Identifier (URI): Generic Syntax".
TS 23.632: "User Data Interworking, Coexistence and Migration"
TS 29.519: "Policy Data, Application Data and Structured Data for Exposure; Stage 3".
TS 29.572: "5G System; Location Management Services; Stage 3".
TS 23.288: "Architecture enhancements for 5G System (5GS) to support network data analytics services".
TS 29.518: "Access and Mobility Management Services".
TS 23.316: "Wireless and wireline convergence access support for the 5G System (5GS); Stage 2".
TS 23.273: "5G System (5GS) Location Services (LCS); Stage 2".
TS 29.515: "5G System; Gateway Mobile Location Services; Stage 3".
TS 29.508: "5G System; Session Management Event Exposure Service; Stage 3".
RFC 6902:  "JavaScript Object Notation (JSON) Patch".
BBF TR-069: "CPE WAN Management Protocol".
BBF TR-369: "User Services Platform (USP)".
TS 29.524: "5G System; Cause codes mapping between 5GC interfaces; Stage 3".
TS 29.122: "T8 reference point for Northbound APIs".
TS 24.008: "Mobile radio interface Layer 3 specification; Core network protocols; Stage 3".
TS 22.071: "Location Services (LCS); Service description; Stage 1".
TS 32.422: "Telecommunication management; Subscriber and equipment trace; Trace control and configuration management".
TS 24.302: "Access to the 3GPP Evolved Packet Core (EPC) via non-3GPP access networks".
RFC 9110:  "http Semantics".
TS 23.287: "Architecture enhancements for 5G System (5GS) to support Vehicle-to-Everything (V2X) services".
TS 29.328: "IP Multimedia (IM) Subsystem Sh interface; Signalling flows and message contents".
TS 23.040: "Technical realization of the Short Message Service (SMS)".
TS 29.522: "5G System; Network Exposure Function Northbound APIs; Stage 3".
TS 33.535: "Authentication and Key Management for Applications (AKMA) based on 3GPP credentials in the 5G System (5GS)".
TS 37.355: "LTE Positioning Protocol (LPP)".
TS 23.304: "Proximity based Services (ProSe) in the 5G System (5GS)".
TS 29.520: "5G System; Network Data Analytics Services; Stage 3".
TS 23.247: "Architectural enhancements for 5G multicast-broadcast services; Stage 2".
TS 23.548: "5G System Enhancements for Edge Computing; Stage 2".
TS 33.220: "Generic Authentication Architecture (GAA); Generic Bootstrapping Architecture (GBA)".
TS 29.563: "5G System; Home Subscriber Server (HSS) services for interworking with Unified Data Management (UDM); Stage 3"
TS 33.558: "Security aspects of enhancement of support for enabling edge applications; Stage 2".
TS 33.503: "Security Aspects of Proximity based Services (ProSe) in the 5G System (5GS)".
TS 29.562: "5G System; Home Subscriber Server (HSS) Services; Stage 3"
TS 23.540: "5G System; Technical realization of Service Based Short Message Service; Stage 2".
TS 32.256: "Charging management; 5G connection and mobility domain charging; Stage 2".
TS 29.514: "5G System; Policy Authorization Service; Stage 3".
[69]  Void
TS 23.256: "Support of Uncrewed Aerial Systems (UAS) connectivity, identification and tracking; Stage 2".
TS 23.015: "Technical realization of Operator Determined Barring (ODB)".

3  Definitions and abbreviationsp. 26

3.1  Definitionsp. 26

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. 26

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
5G ProSe Key Management Function
5G ProSe
5G Proximity-based Services
Auto-Configuration Server
Authentication and Key Management for Applications
Access and Mobility Management Function
Authentication Server Function
Data Collection Coordination Function
Data Network Name
Edge Enabler Server
Fully Qualified Domain Name
Fixed Network RG
Gateway Mobile Location Centre
Generic Public Subscription Identifier
Globally Unique AMF Identifier
Javascript Object Notation
LoCation Services
Low Power and High Accuracy Positioning
LCS Privacy Indicator
Mobile Initiated Connection Only
Network Access Identifier
Non-Access Stratum
Network Exposure Function
Non-IP Data Delivery
Network Repository Function
Network Slice Selection Assistance Information
Network Data Analytics Function
Permanent Equipment Identifier
Personal IoT Network
Position Reference Unit
QoS Flow Identifier
5G Residential Gateway
Residential Gateway
Service Based Interface
SideLink Positioning Key Management Function
Session Management Function
Short Message Service Function
Subscription Concealed Identifier
Subscription Permanent Identifier
Unified Data Management
Unified Data Repository
Wireline Access Gateway Function

4  Overviewp. 27

4.1  Introductionp. 27

Within the 5GC, the UDM offers services to the AMF, SMF, SMSF, NEF, GMLC, NWDAF, AUSF, HSS, GBA's BSF, SMS-GMSC, DCCF, 5GDDNMF, PAnF and 5G PKMF via the Nudm service-based interface (see TS 23.501, TS 23.502, TS 23.288, GPP TS 23.304, TS 23.540, and TS 33.503).
Figure 4.1-1 provides the reference model (in service-based interface representation and in reference point representation), with focus on the UDM.
Reproduction of 3GPP TS 29.503, Fig. 4.1-1: Reference model - UDM
The functionalities supported by the UDM are listed in clause 6.2.7 of TS 23.501.

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