TS 23.121 – UMTS/GSM Evolution Technical Spec
3GPP TS 23.121 is the 3GPP Technical Specification for UMTS/GSM Evolution Technical Spec. It is part of 3GPP R99 (version 3.6.0).
Specifies evolution from GSM to UMTS, covering architecture, Iu interface, and interworking procedures.
Releases and versions of TS 23.121
| Release | Latest version | Links |
|---|---|---|
| R99 | 3.6.0 | Read · Download (3GPP) |
Scope of TS 23.121
Category: Core Network (Network Architecture). Technology generation: 3G. Network layer: CoreNetwork.
Who should read this specification?
- Network operators
- Device manufacturers
- Researchers and academics
Implementation notes
Complexity level: Intermediate. Implementation difficulty: Medium.
Key technologies
Specifications that reference TS 23.121
Other specifications in the 23 series
- TS 23.108 GSM Radio Interface Layer 3 Procedures
- TS 23.110 Access Stratum Services Specification
- TS 23.116 Super-Charger Stage 2 Specification
- TS 23.119 Gateway Location Register (GLR) Stage 2 Description
- TS 23.122 Idle Mode and PLMN Selection Procedures
- TS 23.125 Flow Based Charging Architecture
- TS 23.127 Virtual Home Environment Stage 2 Specification
- TS 23.135 Multicall Supplementary Service Stage 2
Related glossary terms
Related topics
Frequently asked questions
What is 3GPP TS 23.121?
3GPP TS 23.121 is the 3GPP Technical Specification for UMTS/GSM Evolution Technical Spec. Specifies evolution from GSM to UMTS, covering architecture, Iu interface, and interworking procedures.
Which 3GPP releases include TS 23.121?
TS 23.121 is part of 3GPP R99. The latest version on 3GPP Explorer is 3.6.0 (R99).
What category does TS 23.121 belong to?
TS 23.121 belongs to the Core Network (Network Architecture) category of 3GPP specifications. It applies to 3G networks.
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