TS 24.294 – IMS Centralized Services (ICS) I1 Interface Protocol
3GPP TS 24.294 is the 3GPP Technical Specification for IMS Centralized Services (ICS) I1 Interface Protocol. Its official 3GPP title is “IP Multimedia Subsystem (IMS) Centralized Services (ICS) protocol via I1 interface”. It is published in 11 releases (Rel-9 to Rel-19); the latest version is 19.0.0 in Rel-19.
Defines I1 interface protocol between ICS UE and SCC AS for session control and supplementary services, transport-independent application layer.
Releases and versions of TS 24.294
| Release | Latest version | Links |
|---|---|---|
| Rel-19 | 19.0.0 | Read · Download (3GPP) |
| Rel-18 | 18.0.0 | Read · Download (3GPP) |
| Rel-17 | 17.0.0 | Read · Download (3GPP) |
| Rel-16 | 16.0.0 | Read · Download (3GPP) |
| Rel-15 | 15.0.0 | Read · Download (3GPP) |
| Rel-14 | 14.0.0 | Read · Download (3GPP) |
| Rel-13 | 13.0.0 | Read · Download (3GPP) |
| Rel-12 | 12.0.0 | Read · Download (3GPP) |
| Rel-11 | 11.0.0 | Read · Download (3GPP) |
| Rel-10 | 10.1.0 | Read · Download (3GPP) |
| Rel-9 | 9.6.0 | Read · Download (3GPP) |
Scope of TS 24.294
Category: Services (IMS). Technology generation: Multi-Gen. Network layer: Services.
Who should read this specification?
- Network operators
- Device manufacturers
Implementation notes
Complexity level: Advanced. Implementation difficulty: Medium.
Key technologies
Specifications referenced by TS 24.294
- TS 23.009 Handover Procedures in PLMNs
- TS 25.413 Radio Access Network Application Part (RANAP)
- TS 24.229 IMS SIP/SDP Call Control Protocol
- TS 24.237 IMS Service Continuity Protocol Details
- TS 29.002 Mobile Application Part (MAP) Specification
- TS 23.003 Numbering, Addressing and Identification
- TS 23.218 IMS Call Model Specification
- TS 24.173 Multimedia Telephony Service and Supplementary Services in IMS
- TS 23.038 Character Sets, Languages and Message Handling Requirements for SMS, CBS and USSD
- TR 21.905 3GPP Terminology and Definitions
- TS 23.078 CAMEL Phase 4 Stage 2 Specification
- TS 24.147 IMS Conferencing Protocol Details
Specifications that reference TS 24.294
- TS 23.038 Character Sets, Languages and Message Handling Requirements for SMS, CBS and USSD
Other specifications in the 24 series
- TS 24.283 Mission Critical Location Management
- TS 24.285 Allowed CSG List Management Object
- TS 24.286 IP Multimedia (IM) Core Network (CN) subsystem
- TS 24.292 IMS Centralized Services (ICS) Protocol
- TS 24.301 EPS NAS Mobility and Session Management
- TS 24.302 Access to EPC via non-3GPP networks; Stage 3
- TS 24.303 Dual-Stack MIPv6 Mobility Management
- TS 24.304 MIPv4 FA Mode Mobility Management in EPC
Related glossary terms
Related topics
Frequently asked questions
What is 3GPP TS 24.294?
3GPP TS 24.294 is the 3GPP Technical Specification for IMS Centralized Services (ICS) I1 Interface Protocol. Defines I1 interface protocol between ICS UE and SCC AS for session control and supplementary services, transport-independent application layer.
Which 3GPP releases include TS 24.294?
TS 24.294 is published in 11 releases, from Rel-9 to Rel-19. The latest version on 3GPP Explorer is 19.0.0 (Rel-19).
What category does TS 24.294 belong to?
TS 24.294 belongs to the Services (IMS) category of 3GPP specifications. It applies to Multi-Gen networks.
View the full specification with interactive table of contents, version history, and AI analysis.
Read Full Specification →