TS 29.503 – UDM Service Based Interface
3GPP TS 29.503 is the 3GPP Technical Specification for UDM Service Based Interface. Its official 3GPP title is “5G System; Unified Data Management Services”. It is published in 6 releases (Rel-15 to Rel-20); the latest version is 20.1.0 in Rel-20.
Defines the stage 3 protocols, APIs, data models, and procedures for Unified Data Management services in the 5G Core Network.
Releases and versions of TS 29.503
| Release | Latest version | Links |
|---|---|---|
| Rel-20 | 20.1.0 | Read · Download (3GPP) |
| Rel-19 | 19.7.0 | Read · Download (3GPP) |
| Rel-18 | 18.13.0 | Read · Download (3GPP) |
| Rel-17 | 17.22.0 | Read · Download (3GPP) |
| Rel-16 | 16.18.0 | Read · Download (3GPP) |
| Rel-15 | 15.10.0 | Read · Download (3GPP) |
Scope of TS 29.503
Category: Services (UDM and Service Based Interface). Technology generation: 5G. Network layer: Services.
Who should read this specification?
- Network operators
- Device manufacturers
- Regulators and standards bodies
- Researchers and academics
Implementation notes
Complexity level: Advanced. Implementation difficulty: High.
Key technologies
Excerpt from TS 29.503
1 Scope
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 [2] and TS 23.502 [3].
The Technical Realization of the Service Based Architecture and the Principles and Guidelines for Services Definition are specified in TS 29.500 [4] and TS 29.501 [5].
Excerpt from the official 3GPP document (Rel-20). Read the full specification with interactive table of contents.
Specifications referenced by TS 29.503
- TS 29.505 UDR Services for Subscription Data
- TS 32.255 5G Data Connectivity Converged Charging
- TS 32.298 Charging Data Record Specification
- TS 29.510 NRF Service-Based Interface
- TR 21.905 3GPP Terminology and Definitions
- TS 23.122 Idle Mode and PLMN Selection Procedures
- TS 29.002 Mobile Application Part (MAP) Specification
- TS 29.338 Diameter protocols for SMS in MME/5GS
- TS 29.509 AUSF Service Based Interface
- TS 24.501 5GS NAS Protocol Specification
- TS 23.501 5G System Architecture
- TR 21.900 3GPP Document Management Working Methods
Specifications that reference TS 29.503
- TS 23.501 5G System Architecture
- TS 23.502 5G System Procedures
- TS 33.501 5G Security Architecture
- TS 29.510 NRF Service-Based Interface
- TS 29.500 5G Service Based Architecture
- TS 29.501 5GC SBI API Design Principles
- TS 23.288 5G Network Data Analytics Architecture
- TS 32.422 Trace, MDT and UE Measurement Control
- TS 28.541 5G Network Resource Model (NRM) Stage 2 and 3
- TS 28.552 5G Network Performance Measurements
- TS 29.122 T8 SCEF Service Exposure APIs
- TS 29.522 NEF Northbound Interface
Other specifications in the 29 series
- TS 29.486 V2X Application Enabler (VAE) Protocol; Stage 3
- TS 29.500 5G Service Based Architecture
- TS 29.501 5GC SBI API Design Principles
- TS 29.502 5G SMF Service Based Interface Stage 3
- TS 29.504 Nudr Unified Data Repository Services
- TS 29.505 UDR Services for Subscription Data
- TS 29.506 UDR Services for Ambient IoT Data
- TS 29.507 Access and Mobility Policy Control
Frequently asked questions
What is 3GPP TS 29.503?
3GPP TS 29.503 is the 3GPP Technical Specification for UDM Service Based Interface. Defines the stage 3 protocols, APIs, data models, and procedures for Unified Data Management services in the 5G Core Network.
Which 3GPP releases include TS 29.503?
TS 29.503 is published in 6 releases, from Rel-15 to Rel-20. The latest version on 3GPP Explorer is 20.1.0 (Rel-20).
What category does TS 29.503 belong to?
TS 29.503 belongs to the Services (UDM and Service Based Interface) category of 3GPP specifications. It applies to 5G networks.
View the full specification with interactive table of contents, version history, and AI analysis.
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