TS 25.321 – MAC Protocol Specification for UTRAN
3GPP TS 25.321 is the 3GPP Technical Specification for MAC Protocol Specification for UTRAN. It is published in 18 releases (Rel-2 to Rel-19); the latest version is 19.0.0 in Rel-19.
Specifies the MAC protocol for UTRAN, covering architecture, entities, channels, services, functions, and procedures for FDD/TDD modes.
Releases and versions of TS 25.321
| 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 | 13.3.0 | Read · Download (3GPP) |
| Rel-12 | 12.2.0 | Read · Download (3GPP) |
| Rel-11 | 11.5.0 | Read · Download (3GPP) |
| Rel-10 | 10.8.0 | Read · Download (3GPP) |
| Rel-9 | 9.10.0 | Read · Download (3GPP) |
| Rel-8 | 8.17.0 | Read · Download (3GPP) |
| Rel-7 | 7.19.0 | Read · Download (3GPP) |
| Rel-6 | 6.18.0 | Read · Download (3GPP) |
| Rel-5 | 5.14.0 | Read · Download (3GPP) |
| Rel-4 | 4.10.0 | Read · Download (3GPP) |
| R99 | 3.17.0 | Read · Download (3GPP) |
| Rel-2 | 1200 | Read · Download (3GPP) |
Scope of TS 25.321
Category: Radio Access (Layer 2 Protocols). Technology generation: 3G. Network layer: RAN.
Who should read this specification?
- Device manufacturers
- Network operators
- Researchers and academics
Implementation notes
Complexity level: Advanced. Implementation difficulty: High.
Key technologies
Specifications referenced by TS 25.321
- TS 33.102 3G Security Architecture Specification
- TS 25.425 UTRAN Iur Interface User Plane Protocols
- TS 25.133 UTRAN RRM Requirements for FDD
- TS 25.214 UTRA FDD Physical Layer Procedures
- TS 25.123 Radio Resource Management for TDD
- TS 33.105 3G Security: Cryptographic Algorithm Requirements
- TS 25.212 UTRA FDD Layer 1 Multiplexing & Channel Coding
- TS 25.215 UTRA FDD Measurement Definitions
- TS 25.224 UTRA TDD Physical Layer Procedures
- TS 25.222 UTRA TDD Multiplexing & Channel Coding
- TR 21.905 3GPP Terminology and Definitions
- TS 25.225 UTRA TDD Physical Layer Measurements
Specifications that reference TS 25.321
- TS 23.060 GPRS Stage 2 Service Description
- TS 25.331 RRC Protocol for UE-UTRAN Radio Interface
- TS 28.622 Generic Network Resource Information Service
- TS 32.422 Trace, MDT and UE Measurement Control
- TS 33.102 3G Security Architecture Specification
- TS 37.320 MDT Overall Description (Stage 2)
- TS 25.304 UE Idle Mode Procedures
- TS 25.214 UTRA FDD Physical Layer Procedures
- TS 25.215 UTRA FDD Measurement Definitions
- TS 25.224 UTRA TDD Physical Layer Procedures
- TS 25.415 Iu Interface User Plane Protocol
- TS 25.133 UTRAN RRM Requirements for FDD
Other specifications in the 25 series
- TS 25.307 UE Requirements for Release-Independent Frequency Bands
- TS 25.308 HSDPA Overall Description
- TS 25.309 FDD Enhanced Uplink Technical Specification
- TS 25.319 Enhanced Uplink for UTRA FDD/TDD
- TS 25.322 RLC Protocol Specification
- TS 25.323 Packet Data Convergence Protocol (PDCP) Specification
- TS 25.324 Broadcast/Multicast Control Protocol
- TS 25.327 Multi-carrier HSDPA UE requirements
Related glossary terms
Related topics
Frequently asked questions
What is 3GPP TS 25.321?
3GPP TS 25.321 is the 3GPP Technical Specification for MAC Protocol Specification for UTRAN. Specifies the MAC protocol for UTRAN, covering architecture, entities, channels, services, functions, and procedures for FDD/TDD modes.
Which 3GPP releases include TS 25.321?
TS 25.321 is published in 18 releases, from Rel-2 to Rel-19. The latest version on 3GPP Explorer is 19.0.0 (Rel-19).
What category does TS 25.321 belong to?
TS 25.321 belongs to the Radio Access (Layer 2 Protocols) category of 3GPP specifications. It applies to 3G networks.
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