№ files_lp_4_process_3_126878
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The document specifies the addition of PMI reporting requirements for 64 CSI-RS ports with eType II codebook for FDD with 4RX, as part of the 3GPP RAN4 Working Group activities.
Year:
2026
Region / City:
Gothenburg Metropolitan Area, Sweden
Topic:
PMI Reporting Requirements
Document Type:
Change Request (CR)
Organization / Institution:
3GPP TSG-RAN4
Author:
Apple
Target Audience:
3GPP Working Groups
Period of Effect:
2026-02-09 to 2026-02-13
Approval Date:
2026-01-29
Modification Date:
N/A
Related Specifications:
TS 38.521-4
Affected Clauses:
6.3.3.1
Release:
Rel-19
Category:
B
Work Item Code:
NR_MIMO_Ph5-Perf
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Year:
2026
Location:
Gothenburg Metropolitan Area, Sweden
Meeting:
3GPP TSG-RAN4 Meeting #118
Organization:
3rd Generation Partnership Project (3GPP)
Working Group:
TSG-RAN4
Specification:
3GPP TS 38.101-4
Current Specification Version:
19.1.0
Release:
Rel-19
Category:
B (addition of feature)
Work Item Code:
NR_MIMO_Ph5-Perf
Source Company:
Apple
Source to TSG:
R4
Date:
2026-01-29
Affected Clause:
6.3.3.1
Related Test Specification:
TS 38.521-4
Technical Topic:
NR MIMO performance and PMI reporting
Technology Domain:
5G NR radio access
Duplex Mode:
FDD
Antenna Configuration:
64Tx / 4Rx
Purpose of Change:
Introduction of PMI reporting requirements with 64 CSI-RS ports using eType II codebook
Summary of Change:
Addition of requirements for 64-TX eType II configuration for FDD with 4RX
Basis Document:
Endorsed draft Big CR R4-2521039
Year:
2023
Region / City:
Incheon, KR
Topic:
NR 3Tx 4Rx
Document Type:
Meeting Report
Source:
OPPO
Target Audience:
Technical engineers, network operators
Period of validity:
May 22 – May 26, 2023
Approval Date:
Not specified
Modification Date:
Not specified
Year:
2026
Location:
Gothenburg Metropolitan Area, Sweden
Meeting:
3GPP TSG-RAN4 Meeting #118
Organization:
3rd Generation Partnership Project (3GPP)
Working Group:
TSG-RAN4
Specification:
3GPP TS 38.101-4
Current Specification Version:
19.1.0
Release:
Rel-19
Category:
B (addition of feature)
Work Item Code:
NR_MIMO_Ph5-Perf
Source Company:
Apple
Source to TSG:
R4
Date:
2026-01-29
Affected Clause:
6.3.3.1
Related Test Specification:
TS 38.521-4
Technical Topic:
NR MIMO performance and PMI reporting
Technology Domain:
5G NR radio access
Duplex Mode:
FDD
Antenna Configuration:
64Tx / 4Rx
Purpose of Change:
Introduction of PMI reporting requirements with 64 CSI-RS ports using eType II codebook
Summary of Change:
Addition of requirements for 64-TX eType II configuration for FDD with 4RX
Basis Document:
Endorsed draft Big CR R4-2521039
Year:
2020
Region / City:
E-meeting
Theme:
Telecommunications
Document Type:
Technical Proposal
Author:
Huawei, HiSilicon
Target Audience:
Industry professionals in telecommunications
Period of validity:
August 17th – 28th, 2020
Approval Date:
Not specified
Modification Date:
Not specified
Note:
Context
Document Type:
Meeting Report
Organization:
3GPP TSG RAN WG1
Date:
August 17–28, 2020
Reference ID:
R1-200abcd
Scope:
CSI enhancements for MTRP and FR1 FDD reciprocity
Frequency Range:
FR1
Duplex Mode:
FDD
Scenario:
Dense Urban Macro
Antenna Configuration:
gNB 16–32 ports, UE 2–4 RX
Evaluation Metrics:
Throughput and CSI feedback overhead
MIMO Scheme:
SU-MIMO / MU-MIMO with rank adaptation
Channel Modeling:
FDD DL/UL reciprocity, Options 1 and 2
Companies Participating:
19 companies including VIVO, Samsung, Ericsson, Nokia, Apple, Huawei/HiSi
Year:
2020
Region / city:
E-meeting
Topic:
CSI enhancements for MTRP and FR1 FDD reciprocity
Document Type:
Technical Report
Organization / institution:
Huawei, HiSilicon
Author:
Not specified
Target audience:
Industry professionals, technical experts
Period of validity:
Not specified
Approval date:
Not specified
Date of changes:
Not specified
Note:
Context
Year:
2020
Region / City:
E-meeting
Topic:
CSI enhancements, MTRP, FDD reciprocity
Document Type:
Technical Discussion Summary
Organization:
Huawei, HiSilicon
Author:
Not specified
Target Audience:
3GPP TSG RAN WG1 members
Effective Period:
August 17th – 28th, 2020
Approval Date:
Not specified
Modification Date:
Not specified
Evaluation Assumptions:
MTRP, FR1 FDD reciprocity, CSI reporting for DL multi-TRP/panel transmission
Frequency Range:
FR1, 2GHz, optional for 4GHz
Antenna Setup:
Various configurations for gNB and UE
Traffic Model:
FTP model 1, packet size 0.5 Mbytes
Simulation Bandwidth:
20 MHz for 15kHz
MIMO Scheme:
SU/MU-MIMO with rank adaptation
Feedback Assumption:
Periodic CSI feedback
Overhead Assumption:
DNL overhead for CSI
UE Distribution:
80% indoor, 20% outdoor
CSI Feedback Periodicity:
5ms
SRS Modeling:
5ms/10ms periodicity
Evaluation Metric:
Throughput and CSI feedback overhead
Baseline:
Rel-16 PS eTypeII Codebook
SRS Configuration:
Configuration details for different models
FDD DL/UL Calibration:
Ongoing discussions on error model
Channel Modeling:
Discussion on FDD reciprocity models
Context Description:
Technical discussion on CSI enhancements for FDD reciprocity, focusing on MTRP and FR1 with contributions from various companies.
Year:
2022
Region / City:
Global
Topic:
Wireless communication; CSI reporting enhancements
Document Type:
Meeting report / Technical specification proposal
Organization:
3GPP TSG RAN WG1
Author:
Huawei, HiSilicon (Moderator)
Audience:
RAN1 working group members and participating companies
Meeting Dates:
February 21 – March 3, 2022
Agenda Item:
8.1.4
Proposals:
Further enhancement, correction, editorial changes
Target Release:
Rel-17
Frequency Range:
FR1, FR2
Technologies:
MTRP, FDD, CSI-RS, Type II port selection
Companies Contributing:
Lenovo, Samsung, Vivo, CATT
Year:
2026
Region / City:
Gothenburg, Sweden
Theme:
Radio communication
Document type:
Working Draft
Organization:
Ericsson
Author:
Ericsson
Target audience:
RAN4 Working Group members
Approval date:
Not specified
Date of last changes:
Not specified
Period of applicability:
Not specified
Year:
2021
Region:
Global
Topic:
Telecommunications, 5G NR
Document Type:
Change Request
Organization:
3GPP TSG-RAN WG4
Author:
MediaTek
Target Audience:
Network equipment manufacturers, test engineers
Work Item Code:
NR_UE_pow_sav-Perf
Release:
Rel-16
Category:
B (addition of feature)
Date Submitted:
2021-01-15
Affected Sections:
5.3.2.1.3, 5.3.3.1.3
Related Specifications:
TS38.101-4, TS38.521-4
Change Purpose:
Define demodulation performance requirements for power saving UE
Revision History:
Revised from draft CR R4-2102086
Year:
2026
Location:
Gothenburg Metropolitan Area, Sweden
Meeting:
3GPP TSG-RAN4 Meeting #118
Organization:
3rd Generation Partnership Project (3GPP)
Working Group:
TSG-RAN4
Specification:
3GPP TS 38.101-4
Current Specification Version:
19.1.0
Release:
Rel-19
Category:
B (addition of feature)
Work Item Code:
NR_MIMO_Ph5-Perf
Source Company:
Apple
Source to TSG:
R4
Date:
2026-01-29
Affected Clause:
6.3.3.1
Related Test Specification:
TS 38.521-4
Technical Topic:
NR MIMO performance and PMI reporting
Technology Domain:
5G NR radio access
Duplex Mode:
FDD
Antenna Configuration:
64Tx / 4Rx
Purpose of Change:
Introduction of PMI reporting requirements with 64 CSI-RS ports using eType II codebook
Summary of Change:
Addition of requirements for 64-TX eType II configuration for FDD with 4RX
Basis Document:
Endorsed draft Big CR R4-2521039