TS 29.531 – Nnssf Service Based Interface Stage 3
3GPP TS 29.531 is the 3GPP Technical Specification for Nnssf Service Based Interface Stage 3. Its official 3GPP title is “Network Slice Selection Services”. It is published in 6 releases (Rel-15 to Rel-20); the latest version is 20.0.0 in Rel-20.
Specifies the API and protocol for NSSF services including network slice selection and NSSAI availability in 5G.
Releases and versions of TS 29.531
| Release | Latest version | Links |
|---|---|---|
| Rel-20 | 20.0.0 | Read · Download (3GPP) |
| Rel-19 | 19.7.0 | Read · Download (3GPP) |
| Rel-18 | 18.10.0 | Read · Download (3GPP) |
| Rel-17 | 17.12.0 | Read · Download (3GPP) |
| Rel-16 | 16.11.0 | Read · Download (3GPP) |
| Rel-15 | 15.8.0 | Read · Download (3GPP) |
Scope of TS 29.531
Category: Core Network (Service Based Architecture). Technology generation: 5G. Network layer: CoreNetwork.
Who should read this specification?
- Network operators
- Device manufacturers
- Researchers and academics
Implementation notes
Complexity level: Advanced. Implementation difficulty: High.
Key technologies
Specifications referenced by TS 29.531
- TS 33.501 5G Security Architecture
- TS 29.510 NRF Service-Based Interface
- TR 21.900 3GPP Document Management Working Methods
- TR 21.905 3GPP Terminology and Definitions
- TS 24.501 5GS NAS Protocol Specification
- TS 38.413 NG Application Protocol (NGAP) Specification
- TS 23.288 5G Network Data Analytics Architecture
- TS 29.503 UDM Service Based Interface
- TS 23.501 5G System Architecture
- TS 23.502 5G System Procedures
- TS 29.500 5G Service Based Architecture
- TS 29.501 5GC SBI API Design Principles
Specifications that reference TS 29.531
- TS 29.510 NRF Service-Based Interface
- TS 29.500 5G Service Based Architecture
- TS 38.413 NG Application Protocol (NGAP) Specification
- TS 28.541 5G Network Resource Model (NRM) Stage 2 and 3
- TS 28.552 5G Network Performance Measurements
- TS 29.518 AMF Service Based Interface
- TS 29.520 5G NWDAF Services
- TS 29.502 5G SMF Service Based Interface Stage 3
- TS 29.525 UE Policy Control Service
- TS 29.507 Access and Mobility Policy Control
- TS 29.524 5GC to NAS Cause Mapping Specification
- TS 29.552 5G Network Data Analytics Procedures
Other specifications in the 29 series
- TS 29.525 UE Policy Control Service
- TS 29.526 Nnssaaf Service Interface
- TS 29.527 IMS-CS Interworking (SIP-ISUP)
- TS 29.530 5G AF AI/ML Services
- TS 29.532 Nmbsmf Service Based Interface Specification
- TS 29.534 5G Access and Mobility Policy Authorization
- TS 29.535 AAnF Service Based Interface
- TS 29.536 Nnsacf Network Slice Admission Control
Frequently asked questions
What is 3GPP TS 29.531?
3GPP TS 29.531 is the 3GPP Technical Specification for Nnssf Service Based Interface Stage 3. Specifies the API and protocol for NSSF services including network slice selection and NSSAI availability in 5G.
Which 3GPP releases include TS 29.531?
TS 29.531 is published in 6 releases, from Rel-15 to Rel-20. The latest version on 3GPP Explorer is 20.0.0 (Rel-20).
What category does TS 29.531 belong to?
TS 29.531 belongs to the Core Network (Service Based Architecture) category of 3GPP specifications. It applies to 5G networks.
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