TS 29.557 – 5G ProSe Application Function Service
3GPP TS 29.557 is the 3GPP Technical Specification for 5G ProSe Application Function Service. Its official 3GPP title is “5G System; Application Function ProSe Service”. It is published in 3 releases (Rel-17 to Rel-19); the latest version is 19.4.0 in Rel-19.
Specifies stage 3 protocol and data model for 5G ProSe Application Function service, including authorization flows and APIs.
Releases and versions of TS 29.557
| Release | Latest version | Links |
|---|---|---|
| Rel-19 | 19.4.0 | Read · Download (3GPP) |
| Rel-18 | 18.4.0 | Read · Download (3GPP) |
| Rel-17 | 17.3.0 | Read · Download (3GPP) |
Scope of TS 29.557
Primary function: Protocol Definition and API Specification. Category: Services (Application Function ProSe Service). Technology generation: 5G. Network layer: Services.
Who should read this specification?
- Network operators
- Device manufacturers
- Regulators and standards bodies
Protocols and interfaces
Protocols: HTTP/2, NAS
Interfaces: Naf
Key use cases
- ProSe Direct Discovery
- Network Slicing
Implementation notes
Complexity level: Advanced. Implementation difficulty: High.
Key technologies
Specifications referenced by TS 29.557
- TS 29.510 NRF Service-Based Interface
- TS 23.304 5G Proximity Services (ProSe) Stage 2
- TS 23.303 Proximity Services (ProSe) Stage 2
- TS 29.555 5G DDNMF Service Based Interface Stage 3
- TS 29.571 5G Common Data Types
- TR 21.905 3GPP Terminology and Definitions
- 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
- TR 21.900 3GPP Document Management Working Methods
- TS 33.501 5G Security Architecture
Specifications that reference TS 29.557
- TS 24.554 5G ProSe Protocols and Procedures
Other specifications in the 29 series
- TS 29.553 Npanf Service Based Interface Stage 3 Protocol
- TS 29.554 BDT Policy Control Service
- TS 29.555 5G DDNMF Service Based Interface Stage 3
- TS 29.556 EASDF Service Based Interface Stage 3
- TS 29.558 Edge Application Enablement APIs
- TS 29.559 5G PKMF Service Based Interface
- TS 29.561 5G Network Interworking Procedures
- TS 29.562 HSS Nhss Services for IMS and GBA
Related glossary terms
Related topics
Related technologies
Frequently asked questions
What is 3GPP TS 29.557?
3GPP TS 29.557 is the 3GPP Technical Specification for 5G ProSe Application Function Service. Specifies stage 3 protocol and data model for 5G ProSe Application Function service, including authorization flows and APIs.
Which 3GPP releases include TS 29.557?
TS 29.557 is published in 3 releases, from Rel-17 to Rel-19. The latest version on 3GPP Explorer is 19.4.0 (Rel-19).
What does TS 29.557 specify?
Protocol Definition and API Specification.
What category does TS 29.557 belong to?
TS 29.557 belongs to the Services (Application Function ProSe Service) category of 3GPP specifications. It applies to 5G networks.
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