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Content for  TS 29.503  Word version:  16.4.0

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1  ScopeWord‑p. 18
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.
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2  References
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]  TS 33.501   "Security Architecture and Procedures for 5G System".
[7]  TS 29.571   "5G System; Common Data Types for Service Based Interfaces Stage 3".
[8]  TS 23.003   "Numbering, addressing and identification".
[9]  TS 29.504   "5G System; Unified Data Repository Services; Stage 3".
[10]  TS 29.505   "5G System; Usage of the Unified Data Repository Services for Subscription Data; Stage 3".
[11]  TS 32.255   "Charging management; 5G data connectivity domain charging".
[12]  TS 32.298   "Charging management; Charging Data Record (CDR) parameter description".
[13]  RFC 7540:  "Hypertext Transfer Protocol Version 2 (HTTP/2)".
[14]  OpenAPI Initiative, "OpenAPI 3.0.0 Specification", https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.0.md
[15]  RFC 8259:  "The JavaScript Object Notation (JSON) Data Interchange Format".
[16]  RFC 7807:  "Problem Details for HTTP APIs".
[17]  RFC 7396:  "JSON Merge Patch".
[18]  RFC 6749:  "The OAuth 2.0 Authorization Framework".
[19]  TS 29.510   "Network Function Repository Services; Stage 3".
[20]  TS 23.122   "Non-Access-Stratum (NAS) functions related to Mobile Station in idle mode".
[21]  TS 29.002   "Mobile Application Part (MAP) specification".
[22]  TS 29.338   "Diameter based protocols to support Short Message Service (SMS) capable Mobile Management Entities (MMEs)"
[23]  ITU-T Recommendation E.164: "The international public telecommunication numbering plan".
[24]  TS 29.509   "Authentication Server Services; Stage 3".
[25]  RFC 7232:  "Hypertext Transfer Protocol (HTTP/1.1): Conditional Requests".
[26]  RFC 7234:  "Hypertext Transfer Protocol (HTTP/1.1): Caching".
[27]  TS 24.501   "Non-Access-Stratum (NAS) protocol for 5G System (5GS); Stage 3".
[28]  ETSI TS 102 225: "Smart Cards; Secured packet structure for UICC based applications".
[29]  RFC 7542:  "The Network Access Identifier".
[30]  TR 21.900   "Technical Specification Group working methods".
[31]  RFC 3986:  "Uniform Resource Identifier (URI): Generic Syntax".
[32]  TS 23.632   "User Data Interworking, Coexistence and Migration"
[33]  TS 29.519   "Policy Data, Application Data and Structured Data for Exposure; Stage 3".
[34]  TS 29.572   "5G System; Location Management Services; Stage 3".
[35]  TS 23.288   "Architecture enhancements for 5G System (5GS) to support network data analytics services".
[36]  TS 29.518   "Access and Mobility Management Services".
[37]  TS 23.316   "Wireless and wireline convergence access support for the 5G System (5GS); Stage 2".
[38]  TS 23.273   "5G System (5GS) Location Services (LCS); Stage 2".
[39]  TS 29.515   "5G System; Gateway Mobile Location Services; Stage 3".
[40]  TS 29.508   "5G System; Session Management Event Exposure Service; Stage 3".
[41]  RFC 6902:  "JavaScript Object Notation (JSON) Patch".
[42]  BBF TR-069: "CPE WAN Management Protocol".
[43]  BBF TR-369: "User Services Platform (USP)".
[44]  TS 29.524   "5G System; Cause codes mapping between 5GC interfaces; Stage 3".
[45]  TS 29.122   "T8 reference point for Northbound APIs".
[46]  TS 24.008   "Mobile radio interface Layer 3 specification; Core network protocols; Stage 3".
[47]  TS 22.071   "Location Services (LCS); Service description; Stage 1".
[48]  TS 32.422   "Telecommunication management; Subscriber and equipment trace; Trace control and configuration management".
[49]  TS 24.302   "Access to the 3GPP Evolved Packet Core (EPC) via non-3GPP access networks".
[50]  RFC 7230:  "Hypertext Transfer Protocol (HTTP/1.1): Message Syntax and Routing".
[51]  TS 23.287   "Architecture enhancements for 5G System (5GS) to support Vehicle-to-Everything (V2X) services".
[52]  TS 29.328   "IP Multimedia (IM) Subsystem Sh interface; Signalling flows and message contents".
[53]  TS 23.040   "Technical realization of the Short Message Service (SMS)".
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3  Definitions and abbreviationsWord‑p. 20
3.1  Definitions
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  Abbreviations
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.
5GC
5G Core Network
ACS
Auto-Configuration Server
AMF
Access and Mobility Management Function
AUSF
Authentication Server Function
NIDD
Non-IP Data Delivery
DNN
Data Network Name
FQDN
Fully Qualified Domain Name
FN-RG
Fixed Network RG
GMLC
Gateway Mobile Location Centre
GPSI
Generic Public Subscription Identifier
GUAMI
Globally Unique AMF Identifier
HGMLC
Home GMLC
JSON
Javascript Object Notation
LCS
LoCation Services
LPI
LCS Privacy Indicator
MICO
Mobile Initiated Connection Only
N5GC
Non-5G-Capable
NAI
Network Access Identifier
NAS
Non-Access Stratum
NEF
Network Exposure Function
NRF
Network Repository Function
NSSAI
Network Slice Selection Assistance Information
NWDAF
Network Data Analytics Function
PEI
Permanent Equipment Identifier
QFI
QoS Flow Identifier
5G-RG
5G Residential Gateway
RG
Residential Gateway
SBI
Service Based Interface
SMF
Session Management Function
SMSF
Short Message Service Function
SUCI
Subscription Concealed Identifier
SUPI
Subscription Permanent Identifier
UDM
Unified Data Management
UDR
Unified Data Repository
W-AGF
Wireline Access Gateway Function
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4  OverviewWord‑p. 21
4.1  Introduction
Within the 5GC, the UDM offers services to the AMF, SMF, SMSF, NEF, GMLC, NWDAF and AUSF via the Nudm service based interface (see TS 23.501, TS 23.502 and TS 23.288).
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, Figure 4.1-1: Reference model - UDM
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The functionalities supported by the UDM are listed in clause 6.2.7 of TS 23.501.

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