TS 25.401 – UTRAN Overall Architecture
3GPP TS 25.401 is the 3GPP Technical Specification for UTRAN Overall Architecture. It is published in 17 releases (R99 to Rel-19); the latest version is 19.0.0 in Rel-19.
Describes UTRAN architecture, internal interfaces, and assumptions on radio and Iu interfaces.
Releases and versions of TS 25.401
| 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 | 11.1.0 | Read · Download (3GPP) |
| Rel-10 | 10.2.0 | Read · Download (3GPP) |
| Rel-9 | 9.1.1 | Read · Download (3GPP) |
| Rel-8 | 8.2.0 | Read · Download (3GPP) |
| Rel-7 | 7.6.0 | Read · Download (3GPP) |
| Rel-6 | 6.9.0 | Read · Download (3GPP) |
| Rel-5 | 5.10.0 | Read · Download (3GPP) |
| Rel-4 | 4.6.0 | Read · Download (3GPP) |
| R99 | 3.10.0 | Read · Download (3GPP) |
Scope of TS 25.401
Category: Radio Access (UTRAN Architecture). Technology generation: 3G. Network layer: RAN.
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 TS 25.401
- TS 25.424 UTRAN Iur Interface Data Transport & Signalling
- TS 25.434 UTRAN Iub Interface Data Transport and Signalling
- TS 25.426 UTRAN Iur/Iub Transport Bearers
- TS 23.236 Intra Domain Connection of RAN Nodes to Multiple CN Nodes
- 43.930 Iur-g interface; Stage 2
- TR 44.901 Extended NACC for External Cell Change
- TS 48.018 BSS-SGSN Interface for GPRS Control
- TS 25.460 Iuant Interface: General Aspects and Principles
- TS 25.461 Iuant Interface Layer 1 Specification
- TS 25.462 Iuant Interface: Signalling Transport
- TS 23.251 Network Sharing Stage 2 Specification
- TS 25.410 Iu Interface Introduction for UTRAN
Specifications that reference TS 25.401
- TS 23.401 Evolved Packet System Architecture
- TS 23.060 GPRS Stage 2 Service Description
- TS 26.114 IMS Multimedia Telephony Client
- TS 25.331 RRC Protocol for UE-UTRAN Radio Interface
- TS 25.413 Radio Access Network Application Part (RANAP)
- TS 23.221 3GPP System Architectural Requirements
- TS 31.111 USIM Application Toolkit (USAT) Specification
- TS 25.215 UTRA FDD Measurement Definitions
- TS 25.224 UTRA TDD Physical Layer Procedures
- TS 25.415 Iu Interface User Plane Protocol
- TS 25.301 UE-UTRAN Radio Interface Protocol Architecture
- TS 25.211 UTRA FDD Layer 1: Transport & Physical Channels
Other specifications in the 25 series
- TS 25.327 Multi-carrier HSDPA UE requirements
- TS 25.331 RRC Protocol for UE-UTRAN Radio Interface
- TS 25.346 MBMS in UTRA Technical Specification
- TS 25.367 Home NodeB Mobility Procedures
- TS 25.402 UTRAN Synchronisation Mechanisms
- TS 25.410 Iu Interface Introduction for UTRAN
- TS 25.411 Iu Interface Layer 1 Specification
- TS 25.412 Iu Interface Signalling Transport Specification
Related glossary terms
Related topics
Frequently asked questions
What is 3GPP TS 25.401?
3GPP TS 25.401 is the 3GPP Technical Specification for UTRAN Overall Architecture. Describes UTRAN architecture, internal interfaces, and assumptions on radio and Iu interfaces.
Which 3GPP releases include TS 25.401?
TS 25.401 is published in 17 releases, from R99 to Rel-19. The latest version on 3GPP Explorer is 19.0.0 (Rel-19).
What category does TS 25.401 belong to?
TS 25.401 belongs to the Radio Access (UTRAN Architecture) category of 3GPP specifications. It applies to 3G networks.
View the full specification with interactive table of contents, version history, and AI analysis.
Read Full Specification →