№ files_lp_3_process_9_36731
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This document outlines the MAC protocol specification for NR in Release 18 within the 3GPP framework, providing technical details on channel structure, procedures, and operations relevant to the radio access network.
Year: 2025
Region / City: Sophia Antipolis, France
Topic: Medium Access Control (MAC) Protocol Specification for NR
Document Type: Technical Specification
Organization / Institution: 3GPP
Author: 3GPP Organizational Partners
Target Audience: Developers, Engineers, Researchers
Period of Validity: N/A
Approval Date: N/A
Date of Changes: N/A
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3GPP TS 38.306 V17.121.0 (20254-0312) Technical Specification
Year: 2025
Region / City: Sophia Antipolis, France
Topic: Radio Access Network, User Equipment (UE) Capabilities
Document Type: Technical Specification
Organization: 3GPP
Author: 3GPP Technical Specification Group Radio Access Network
Target Audience: Industry professionals and developers in wireless communication technologies
Validity Period: Release 17
Approval Date: N/A
Modification Date: N/A
Introduction of Network energy savings to TS 38.321
Year: 2023
Region / city: Chicago, U.S.A.
Subject: Network Energy Saving
Document Type: Change Request
Organization / Institution: 3GPP
Author: InterDigital
Target Audience: 3GPP members, RAN2 working group
Action Period: November 2023
Approval Date: 2023-11-03
Change Category: B (addition of feature)
Release: Rel-18
3GPP TS 38.321 V17.143.0 (2025-096) Technical Specification for NR MAC protocol (Release 17)
Year: 2025
Region / City: Sophia Antipolis, France
Subject: NR Medium Access Control (MAC) protocol specification
Document Type: Technical Specification
Organization / Institution: 3GPP
Author: 3GPP
Target Audience: 3GPP Organizational Partners and future development work participants
Validity Period: Ongoing development
Approval Date: Not yet approved
Date of Changes: 2025
Context: Technical specification for the MAC protocol in NR systems as defined by 3GPP, detailing procedures for data transfer, random access, and resource management.
Addition of MPE reporting to TS 38.321 in Rel-16
Year: 2020
Organization: 3GPP RAN WG2
Document type: Change Request
Work item code: NR_RF_FR2_req_enh
Category: B
Release: Rel-16
Affected specifications: TS 38.321, TS/TR 38.331, TS 38.101-1, TS 38.101-2, TS 38.101-3
Date: 2020-08-24
Source to WG: R2
Clauses affected: 5.4.6, 6.1.3
Technical focus: FR2 MPE P-MPR measurement and reporting, Power Headroom reporting
3GPP TS 38.321 V18.87.0 (2025-12-09) Medium Access Control (MAC) protocol specification for NR (Release 18)
Year: 2025
Organization: 3rd Generation Partnership Project (3GPP)
Technical Group: Radio Access Network; NR
Document Type: Technical Specification
Scope: Medium Access Control (MAC) protocol for 5G NR
Release: 18
Authors: 3GPP Technical Specification Group
Target Audience: Network engineers, protocol developers, researchers in mobile communications
Status: For future development work, not for implementation
Publication Date: 2025-12-09
Copyright: © 2025 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC)
3GPP TS 38.321 Change Request 0691: MAC Running CR for NR eMIMO (RAN WG2 Meeting #109, February–March 2020)
Year: 2020
Meeting: 3GPP TSG-RAN WG2 Meeting #109
Location: Elbonia
Meeting period: 24 February – 6 March 2020
Specification: 3GPP TS 38.321
Current specification version: 15.8.0
Change Request number: 0691
Revision: -1
Release: Rel-16
Category: B (addition of feature)
Work item code: NR_eMIMO-Core
Source to WG: Samsung
Source to TSG: R2
Affected system components: Mobile Equipment (ME), Radio Access Network
Technical domain: NR MAC protocol
Related technology: 5G New Radio (NR)
Subject: MAC Control Elements and protocol updates for enhanced MIMO operation
Affected clauses: 3.2, 5.1.1, 5.1.2, 5.4.3.1.3, 5.4.4, 5.9, 5.17, 5.18.1, 5.18.4, 5.18.5, 5.18.yy, 5.18.za, 5.18.zb, 5.18.zc, 5.18.zd, 5.18.ze, 6.1.3.14, 6.1.3.15 and related sections
Key technical elements: MAC Control Elements, PUCCH spatial relation, SRS spatial relation, Pathloss Reference RS activation, TCI state activation, multi-CC and multi-BWP operation
Related specifications: 3GPP TS 38.300, 3GPP TS 38.322, 3GPP TS 38.323, 3GPP TS 38.331, 3GPP TS 38.213, 3GPP TS 38.214, 3GPP TS 38.211, 3GPP TS 38.212
Topics: V18540 20254-0312 38321