TR 22.979 – CS-IMS Combinational Service Requirements
3GPP TR 22.979 is the 3GPP Technical Report for CS-IMS Combinational Service Requirements. Its official 3GPP title is “Feasibility study on combined Circuit Switched (CS) calls and IP Multimedia Subsystem (IMS) sessions”. It is published in 13 releases (Rel-7 to Rel-19); the latest version is 19.0.0 in Rel-19.
Studies service requirements for combining a CS call with IMS services, focusing on user experience, charging, and supplementary services.
Releases and versions of TR 22.979
| Release | Latest version | Links |
|---|---|---|
| Rel-19 | 19.0.0 | Read · Download (3GPP) |
| Rel-18 | 18.0.1 | 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 | 10.0.0 | Read · Download (3GPP) |
| Rel-9 | 9.0.0 | Read · Download (3GPP) |
| Rel-8 | 8.0.0 | Read · Download (3GPP) |
| Rel-7 | 7.0.0 | Read · Download (3GPP) |
Scope of TR 22.979
Category: Services (IMS). Technology generation: 3G. Network layer: Services.
Who should read this specification?
- Network operators
- Device manufacturers
- Researchers and academics
Implementation notes
Complexity level: Intermediate. Implementation difficulty: Medium.
Key technologies
Specifications referenced by TR 22.979
- TS 22.115 3GPP Charging and Billing Service Aspects
Specifications that reference TR 22.979
- TS 22.279 CS and IMS Combinational Services Requirements
Other specifications in the 22 series
- TR 22.975 UMTS Numbering and Addressing Requirements
- TR 22.976 3GPP Release 2000 Service Requirements TR
- TR 22.977 Speech Enabled Services and Multimodal Framework
- TR 22.978 Feasibility of All-IP Network (AIPN) in 3GPP
- TR 22.980 Network Composition Feasibility Study
- TR 22.982 Customized Alerting Tone Service Requirements
- TR 22.983 Service Delivery Across CS and IMS Domains
- TR 22.985 3GPP User Data Convergence (UDC) concept
Related glossary terms
Related topics
Frequently asked questions
What is 3GPP TR 22.979?
3GPP TR 22.979 is the 3GPP Technical Report for CS-IMS Combinational Service Requirements. Studies service requirements for combining a CS call with IMS services, focusing on user experience, charging, and supplementary services.
Which 3GPP releases include TR 22.979?
TR 22.979 is published in 13 releases, from Rel-7 to Rel-19. The latest version on 3GPP Explorer is 19.0.0 (Rel-19).
What category does TR 22.979 belong to?
TR 22.979 belongs to the Services (IMS) category of 3GPP specifications. It applies to 3G networks.
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