TS 23.228 – IP Multimedia Core Network Subsystem
3GPP TS 23.228 is the 3GPP Technical Specification for IP Multimedia Core Network Subsystem. Its official 3GPP title is “IP Multimedia Subsystem (IMS)”. It is published in 18 releases (Rel-2 to Rel-20); the latest version is 20.1.0 in Rel-20.
Defines the stage-2 IMS service architecture, functions, procedures, interfaces, and mechanisms for delivering IP multimedia services across 3GPP and other IP access networks.
Releases and versions of TS 23.228
| Release | Latest version | Links |
|---|---|---|
| Rel-20 | 20.1.0 | Read · Download (3GPP) |
| Rel-19 | 19.8.0 | Read · Download (3GPP) |
| Rel-18 | 18.12.0 | Read · Download (3GPP) |
| Rel-17 | 17.3.0 | Read · Download (3GPP) |
| Rel-16 | 16.7.0 | Read · Download (3GPP) |
| Rel-15 | 15.5.0 | Read · Download (3GPP) |
| Rel-14 | 14.7.0 | Read · Download (3GPP) |
| Rel-13 | 13.9.0 | Read · Download (3GPP) |
| Rel-12 | 12.11.0 | Read · Download (3GPP) |
| Rel-11 | 11.11.0 | Read · Download (3GPP) |
| Rel-10 | 10.9.0 | Read · Download (3GPP) |
| Rel-9 | 9.4.0 | Read · Download (3GPP) |
| Rel-8 | 8.12.0 | Read · Download (3GPP) |
| Rel-7 | 7.16.0 | Read · Download (3GPP) |
| Rel-6 | 6.16.0 | Read · Download (3GPP) |
| Rel-5 | 5.15.0 | Read · Download (3GPP) |
| R99 | 1100 | Read · Download (3GPP) |
| Rel-2 | 1200 | Read · Download (3GPP) |
Scope of TS 23.228
Category: Services (IMS). Technology generation: Multi-Gen. Network layer: Services.
Who should read this specification?
- Network operators
- Device manufacturers
- Regulators and standards bodies
- Researchers and academics
Implementation notes
Complexity level: Expert. Implementation difficulty: High.
Key technologies
Excerpt from TS 23.228
1 Scope
This document defines the stage-2 service description for the IP Multimedia Core Network Subsystem (IMS), which includes the elements necessary to support IP Multimedia (IM) services. ITU‑T Recommendation I.130 [4] describes a three-stage method for characterisation of telecommunication services and ITU‑T Recommendation Q.65 [3] defines stage 2 of the method.
This document does not cover the Access Network functionality except as they relate to provision of IM services, these aspects are covered in the normative Annexes.
This document identifies the mechanisms to enable support for IP multimedia applications. In order to align IP multimedia applications wherever possible with non-3GPP IP applications, the general approach is to adopt non-3GPP specific IP based solutions.
Excerpt from the official 3GPP document (Rel-20). Read the full specification with interactive table of contents.
Specifications referenced by TS 23.228
- TS 36.321 E-UTRA MAC Protocol Specification
- TS 38.300 NR and NG-RAN Overall Description
- TS 38.321 NR MAC Protocol Specification
- TS 23.288 5G Network Data Analytics Architecture
- TS 26.264 IMS-based Conversational Augmented Reality Services
- TS 24.186 IMS Data Channel and AR Communication
- TS 29.214 Rx Interface for Policy and Charging Control
- TS 33.203 IMS Security Features and Mechanisms
- TS 23.002 3GPP System Architecture Overview
- TS 33.210 Network Domain Security for IP Networks
- 22.941 IP Based Multimedia Services Framework
- TS 23.060 GPRS Stage 2 Service Description
Specifications that reference TS 23.228
- TS 23.501 5G System Architecture
- TS 23.502 5G System Procedures
- TS 24.229 IMS SIP/SDP Call Control Protocol
- TS 23.401 Evolved Packet System Architecture
- TS 23.060 GPRS Stage 2 Service Description
- TS 26.114 IMS Multimedia Telephony Client
- TS 23.203 Policy and Charging Control Architecture
- TS 23.503 5G Policy and Charging Control Framework
- TS 23.002 3GPP System Architecture Overview
- TS 32.240 3GPP Charging Architecture and Principles
- TS 23.682 Architecture for MTC and SCEF Enhancements
- TS 23.288 5G Network Data Analytics Architecture
Other specifications in the 23 series
- TS 23.221 3GPP System Architectural Requirements
- TS 23.222 Common API Framework (CAPIF)
- TS 23.226 Global Text Telephony (GTT) Stage 2
- TS 23.227 UE Resource Scheduling and Application Management
- TS 23.231 SIP-I based CS core network stage 2
- TS 23.234 3GPP-WLAN Interworking Index
- TS 23.236 Intra Domain Connection of RAN Nodes to Multiple CN Nodes
- TS 23.237 IMS Service Continuity (ISC) Stage 2
Frequently asked questions
What is 3GPP TS 23.228?
3GPP TS 23.228 is the 3GPP Technical Specification for IP Multimedia Core Network Subsystem. Defines the stage-2 IMS service architecture, functions, procedures, interfaces, and mechanisms for delivering IP multimedia services across 3GPP and other IP access networks.
Which 3GPP releases include TS 23.228?
TS 23.228 is published in 18 releases, from Rel-2 to Rel-20. The latest version on 3GPP Explorer is 20.1.0 (Rel-20).
What category does TS 23.228 belong to?
TS 23.228 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.
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