TS 23.304 – 5G Proximity Services (ProSe) Stage 2
3GPP TS 23.304 is the 3GPP Technical Specification for 5G Proximity Services (ProSe) Stage 2. Its official 3GPP title is “Proximity based Services (ProSe) in the 5G System (5GS)”. It is published in 4 releases (Rel-17 to Rel-20); the latest version is 20.1.0 in Rel-20.
Specifies Stage 2 of 5G ProSe features: Direct Discovery, Direct Communication, UE-to-Network Relay, UE-to-UE Relay, and Intermediate UE-to-Network Relay.
Releases and versions of TS 23.304
| Release | Latest version | Links |
|---|---|---|
| Rel-20 | 20.1.0 | Read · Download (3GPP) |
| Rel-19 | 19.6.0 | Read · Download (3GPP) |
| Rel-18 | 18.8.0 | Read · Download (3GPP) |
| Rel-17 | 17.8.0 | Read · Download (3GPP) |
Scope of TS 23.304
Category: Services (Proximity Services). 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 23.304
- TS 36.300 E-UTRAN Radio Interface Protocol Architecture
- TS 38.300 NR and NG-RAN Overall Description
- TS 38.304 NR UE Idle and Inactive State Procedures
- TS 23.122 Idle Mode and PLMN Selection Procedures
- TS 36.331 E-UTRA Radio Resource Control (RRC) Protocol
- TS 38.331 NR Radio Resource Control (RRC)
- TR 21.905 3GPP Terminology and Definitions
- TR 23.752 5G ProSe Enhancement Study
- TS 32.277 Charging Management for Proximity Services (ProSe)
- TS 24.554 5G ProSe Protocols and Procedures
- TS 38.351 Sidelink Relay Adaptation Protocol (SRAP)
- TS 33.503 5G ProSe Security Specification
Specifications that reference TS 23.304
- TS 23.501 5G System Architecture
- TS 23.502 5G System Procedures
- TS 36.331 E-UTRA Radio Resource Control (RRC) Protocol
- TS 38.300 NR and NG-RAN Overall Description
- TS 38.331 NR Radio Resource Control (RRC)
- TS 23.503 5G Policy and Charging Control Framework
- TS 38.413 NG Application Protocol (NGAP) Specification
- TS 28.541 5G Network Resource Model (NRM) Stage 2 and 3
- TS 31.102 USIM Application Specification
- TS 29.503 UDM Service Based Interface
- TS 37.340 Overview of Multi-Connectivity Operation using E-UTRA and NR
- TS 38.321 NR MAC Protocol Specification
Other specifications in the 23 series
- TS 23.288 5G Network Data Analytics Architecture
- TS 23.289 Mission Critical Services over 5G System Architecture
- TS 23.292 IMS Centralized Services (ICS) Architecture
- TS 23.303 Proximity Services (ProSe) Stage 2
- TS 23.316 Wireless and wireline convergence access support
- TS 23.327 3GPP-WLAN Mobility Stage 2 Description
- TS 23.333 MRFC-MRFP Mp Interface Requirements
- TS 23.334 IMS-ALG to IMS-AGW Interface (Iq) Stage 2
Frequently asked questions
What is 3GPP TS 23.304?
3GPP TS 23.304 is the 3GPP Technical Specification for 5G Proximity Services (ProSe) Stage 2. Specifies Stage 2 of 5G ProSe features: Direct Discovery, Direct Communication, UE-to-Network Relay, UE-to-UE Relay, and Intermediate UE-to-Network Relay.
Which 3GPP releases include TS 23.304?
TS 23.304 is published in 4 releases, from Rel-17 to Rel-20. The latest version on 3GPP Explorer is 20.1.0 (Rel-20).
What category does TS 23.304 belong to?
TS 23.304 belongs to the Services (Proximity Services) category of 3GPP specifications. It applies to 5G networks.
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