№ files_lp_4_process_3_094237
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Technical standardization change request documenting proposed updates to the NR MAC protocol specification to introduce and modify MAC Control Elements supporting enhanced MIMO functions and multi-cell transmission configurations in 5G systems.
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
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3GPP TSG RAN WG1 #100bis R1-2002978e Meeting, 20–30 April 2020: Feature Lead Summary of Email Discussion on NR eMIMO ULFPTx (Agenda Item 7.2.6.4)
Organization: 3GPP TSG RAN WG1
Meeting: #100bis
Document number: R1-2002978e
Date: 20–30 April 2020
Source: moderator (vivo)
Agenda Item: 7.2.6.4
Document for: Discussion and Decision
Title: Feature lead summary of [100b-e-NR-eMIMO-ULFPTx-01] Email discussion
Technical specification: TS 38.214
Affected clauses: 38.214 section 6.1.1.1
Related specifications: TS 38.211; TS 38.212
Subject: Codebook based UL transmission and codebookSubset configuration for 2-port and 4-port SRS resources
Reason for change: Ambiguity of codebook subset associated with 2 port SRS resource when partialAndNonCoherent is configured
Summary of change: Clarification that the codebookSubset associated with 2 port SRS resource is nonCoherent under specified conditions
Consequences if not approved: Ambiguity in codebook subset associated with 2 port SRS
Companies providing comments: OPPO; CMCC; LG
Report from Break-out session on R16 eMIMO, CLI, PRN, RACS and R17 NTN and REDCAP
Year: 2020
Region / City: Online
Topic: 5G, eMIMO, CLI, PRN, RACS, NTN, REDCAP
Document Type: Report
Organ / Institution: 3GPP TSG-RAN WG2
Author: Vice Chairman (ZTE Corporation)
Target Audience: 3GPP members
Period of Validity: November 2nd - 13th, 2020
Approval Date: 2020-11-03
Date of Amendments: Not specified
Status: Ongoing
Time Zone: UTC
Meeting Dates: November 2nd - 13th, 2020
End Date: 2020-11-13
Context: Report summarizing the discussions and plans for various NR R16 and R17 topics, including eMIMO, CLI, PRN, RACS, NTN, and REDCAP, from the 3GPP TSG-RAN WG2 break-out sessions.
Email discussion summary for RAN4#94e #16 NR eMIMO UE RF — 3GPP TSG-RAN WG4 Electronic Meeting, Feb. 24 – Mar. 6, 2020
Year: 2020
Event: 3GPP TSG-RAN WG4 Meeting #94-e
Meeting format: Electronic Meeting
Date: 24 February – 6 March 2020
Agenda item: 8.11.1
Document type: Technical meeting contribution
Technical field: 5G NR radio access network and RF requirements
Topic: NR eMIMO UE RF requirements and MPR evaluation
Working group: 3GPP TSG-RAN WG4
Work item: Rel-16 Enhancements on MIMO for NR
Source: Moderator (Samsung)
Participating companies: Qualcomm Incorporated; Nokia; Nokia Shanghai Bell; Huawei; HiSilicon
Key technologies: pi/2-BPSK DMRS; MPR (Maximum Power Reduction); FR1 and FR2 frequency ranges; uplink full power transmission
Purpose: Information and coordination of email discussion topics for RAN4#94e
Relevant specifications: Rel-15 and Rel-16 NR RF requirements
Evaluation scope: RF requirements impact and MPR improvements for pi/2-BPSK DMRS and uplink full power transmission
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.
3GPP TS 38.321 V18.54.0 (20254-0312) Technical Specification
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
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)
Topics: 0691 eMIMO 38321