TS 36.321 – E-UTRA MAC Protocol Specification
3GPP TS 36.321 is the 3GPP Technical Specification for E-UTRA MAC Protocol Specification. Its official 3GPP title is “Evolved Universal Terrestrial Radio Access (E-UTRA)”. It is published in 12 releases (Rel-8 to Rel-19); the latest version is 19.3.0 in Rel-19.
Specifies the MAC protocol for E-UTRA (LTE), including channels, procedures, DRX, random access, HARQ, and support for NB-IoT and enhanced coverage.
Releases and versions of TS 36.321
| Release | Latest version | Links |
|---|---|---|
| Rel-19 | 19.3.0 | Read · Download (3GPP) |
| Rel-18 | 18.5.0 | Read · Download (3GPP) |
| Rel-17 | 17.7.0 | Read · Download (3GPP) |
| Rel-16 | 16.9.0 | Read · Download (3GPP) |
| Rel-15 | 15.11.0 | Read · Download (3GPP) |
| Rel-14 | 14.13.0 | Read · Download (3GPP) |
| Rel-13 | 13.9.0 | Read · Download (3GPP) |
| Rel-12 | 12.10.0 | Read · Download (3GPP) |
| Rel-11 | 11.6.0 | Read · Download (3GPP) |
| Rel-10 | 10.10.0 | Read · Download (3GPP) |
| Rel-9 | 9.6.0 | Read · Download (3GPP) |
| Rel-8 | 8.12.0 | Read · Download (3GPP) |
Scope of TS 36.321
Category: Radio Access (Medium Access Control). Technology generation: 4G. 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 referenced by TS 36.321
- TS 36.101 LTE UE Radio Transmission and Reception
- TS 36.216 LTE Relay Node Physical Layer
- TS 36.306 E-UTRA UE Radio Access Capability Parameters
- TS 23.303 Proximity Services (ProSe) Stage 2
- TS 23.285 V2X Architecture Enhancements for LTE
- TS 24.386 V2X Communication Protocols and Procedures
- TS 26.114 IMS Multimedia Telephony Client
- TS 38.323 PDCP Protocol Specification
- TS 38.213 NR Physical Layer Control Procedures
- TS 38.133 NR Radio Resource Management Requirements
- TR 21.905 3GPP Terminology and Definitions
- TS 36.300 E-UTRAN Radio Interface Protocol Architecture
Specifications that reference TS 36.321
- TS 23.502 5G System Procedures
- TS 24.229 IMS SIP/SDP Call Control Protocol
- TS 23.401 Evolved Packet System Architecture
- TS 36.331 E-UTRA Radio Resource Control (RRC) Protocol
- TS 23.228 IP Multimedia Core Network Subsystem
- TS 36.300 E-UTRAN Radio Interface Protocol Architecture
- TS 26.114 IMS Multimedia Telephony Client
- TS 28.622 Generic Network Resource Information Service
- TS 24.301 EPS NAS Mobility and Session Management
- TS 32.422 Trace, MDT and UE Measurement Control
- TS 38.321 NR MAC Protocol Specification
- TS 36.304 LTE UE Idle Mode Procedures
Other specifications in the 36 series
- TS 36.305 UE Positioning in E-UTRAN Stage 2
- TS 36.306 E-UTRA UE Radio Access Capability Parameters
- TS 36.307 Release Independent UE Requirements for E-UTRA
- TS 36.314 E-UTRA Radio Measurements Specification
- TS 36.322 E-UTRA Radio Link Control Protocol Specification
- TS 36.323 PDCP Protocol Specification
- TS 36.331 E-UTRA Radio Resource Control (RRC) Protocol
- TS 36.355 LTE Positioning Protocol (LPP)
Frequently asked questions
What is 3GPP TS 36.321?
3GPP TS 36.321 is the 3GPP Technical Specification for E-UTRA MAC Protocol Specification. Specifies the MAC protocol for E-UTRA (LTE), including channels, procedures, DRX, random access, HARQ, and support for NB-IoT and enhanced coverage.
Which 3GPP releases include TS 36.321?
TS 36.321 is published in 12 releases, from Rel-8 to Rel-19. The latest version on 3GPP Explorer is 19.3.0 (Rel-19).
What category does TS 36.321 belong to?
TS 36.321 belongs to the Radio Access (Medium Access Control) category of 3GPP specifications. It applies to 4G networks.
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