TR 25.921 – UMTS Protocol Specification Guidelines
3GPP TR 25.921 is the 3GPP Technical Report for UMTS Protocol Specification Guidelines. It is published in 5 releases (R99 to Rel-7); the latest version is 7.0.0 in Rel-7.
Guidelines for specifying UMTS stage 2 and 3 protocols, including compatibility, error handling, formal methods, and procedure documentation.
Releases and versions of TR 25.921
| Release | Latest version | Links |
|---|---|---|
| Rel-7 | 7.0.0 | Read · Download (3GPP) |
| Rel-6 | 6.1.0 | Read · Download (3GPP) |
| Rel-5 | 5.5.0 | Read · Download (3GPP) |
| Rel-4 | 4.8.0 | Read · Download (3GPP) |
| R99 | 3.11.0 | Read · Download (3GPP) |
Scope of TR 25.921
Category: Radio Access (Protocol Specification). Technology generation: 3G. Network layer: RAN.
Who should read this specification?
- Network operators
- Device manufacturers
- Researchers and academics
Implementation notes
Complexity level: Advanced. Implementation difficulty: High.
Key technologies
Specifications that reference TR 25.921
- TS 25.331 UTRAN Radio Resource Control Protocol
- TS 25.413 Radio Access Network Application Part (RANAP)
- TS 38.413 NG Application Protocol (NGAP) Specification
- TS 36.413 S1 Application Protocol (S1AP) for E-UTRAN
- TS 25.321 MAC Protocol Specification for UTRAN
- TS 38.423 NG-RAN Xn Application Protocol
- TS 36.423 X2 Application Protocol (X2AP) Specification
- TS 25.433 Node B Application Part (NBAP) Protocol
- TS 38.473 F1 Application Protocol (F1AP)
- TS 38.455 NR Positioning Protocol A
- TS 25.423 UTRAN RNSAP Specification
- TS 36.455 LTE Positioning Protocol Annex (LPPa)
Other specifications in the 25 series
- TR 25.907 RF Pattern Matching for UMTS Location
- TR 25.912 Evolved UTRA and UTRAN Technical Report
- TR 25.913 Evolved UTRA and UTRAN Requirements
- TR 25.914 3G UE Radio Performance Test Methods
- TR 25.922 UTRAN Radio Resource Management Strategies
- TR 25.925 UMTS Broadcast and Multicast Radio Aspects
- TR 25.926 UMTS UE Radio Access Capabilities
- TR 25.927 Energy Saving Solutions for UMTS Node B
Frequently asked questions
What is 3GPP TR 25.921?
3GPP TR 25.921 is the 3GPP Technical Report for UMTS Protocol Specification Guidelines. Guidelines for specifying UMTS stage 2 and 3 protocols, including compatibility, error handling, formal methods, and procedure documentation.
Which 3GPP releases include TR 25.921?
TR 25.921 is published in 5 releases, from R99 to Rel-7. The latest version on 3GPP Explorer is 7.0.0 (Rel-7).
What category does TR 25.921 belong to?
TR 25.921 belongs to the Radio Access (Protocol Specification) category of 3GPP specifications. It applies to 3G networks.
Now in 3GPP
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