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Summary of proposals and discussions on uplink timing and frequency synchronization for non-terrestrial networks, including UE GNSS capability assumptions, timing advance acquisition methods, and ephemeris handling, from the TSG-RAN WG1 #102-e meeting.
Year:
2020
Event:
TSG-RAN WG1 Meeting #102-e
Topic:
UL time and frequency synchronization for NR NTN
Document type:
Technical contribution / meeting report
Organization:
3GPP
Author:
Thales (moderator)
Contributors:
MediaTek, CATT, Ericsson, InterDigital, CMCC, ZTE, Apple, CAICT, Sony, LG Electronics
Target audience:
3GPP RAN1 working group members
Agenda item:
8.4.2
Sections:
Clarification on UE capability; UL timing synchronization; UL frequency synchronization; Serving satellite ephemeris; References
Scope:
NR NTN Rel-17 solutions
Date of meeting:
August 17–28, 2020
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Year:
2020
Note:
Region / City
Topic:
NR SRS carrier switching
Document Type:
Discussion
Organization:
3GPP
Author:
Qualcomm Incorporated
Target Audience:
RAN1 and RAN2 groups
Organization:
3rd Generation Partnership Project (3GPP)
Group:
TSG RAN WG1
Meeting:
#102-e e-Meeting
Document Number:
R1-2007151
Agenda Item:
8.1.1
Source:
Moderator (Samsung)
Company:
Samsung
Title:
Moderator summary for multi-beam enhancement: EVM
Work Item:
Rel.17 NR FeMIMO
Frequency Range:
FR2 @ 30 GHz (baseline), applicable also to FR1
Simulation Type:
SLS (baseline), optional LLS
Scenarios:
Dense Urban, High Speed Train, Indoor
Channel Model References:
TR 38.802, TR 38.913, TR 38.901
Performance Metrics:
UE throughput CDF, average and 5% throughput, TCI state update signaling overhead, beam switching latency, RSRP distribution
Traffic Model:
Full buffer
UE Configuration:
Multi-panel UE (3 panels: left, right, back)
Antenna Configuration:
BS (4,8,2,2,2); UE (1,4,2)
Transmission Scheme:
Multi-antenna port transmission
Link Adaptation:
Based on CSI-RS
Intended Purpose:
Discussion and Decision
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
Organization:
3rd Generation Partnership Project
Working Group:
TSG-RAN WG4
Meeting:
#102-e
Document number:
R4-22XXXXX
Meeting type:
Electronic Meeting
Date:
21 February – 03 March 2022
Agenda item:
10.14
Source:
Moderator (MediaTek Inc.)
Title (as provided):
Email discussion summary for [102-e][222] NR_UE_pow_sav_enh
Document for:
Information
Related Work Item:
NR_UE_pow_sav_enh (Rel-17)
Related Specifications:
RLM/BFD relaxation, RRM requirements
Contributing Companies:
CMCC; Ericsson; MediaTek Inc.; Qualcomm, Inc.; Apple; vivo
Technical Scope:
UE Power Saving Enhancements including RLM/BFD relaxation and RRM performance requirements
Discussion Rounds:
1st round (scope and options); 2nd round (issue conclusions)
Feature Table Reference:
Rel-17 feature table entry for Support of RLM/BFD relaxation
Type of Document:
Meeting summary and technical discussion report
Year:
2020
Organization:
3GPP TSG RAN WG1
Meeting Number:
102-e
Source:
Moderator (Samsung)
Document Type:
Meeting Report / Technical Discussion
Agenda Item:
8.7.1.2
Topics Covered:
TRS/CSI-RS for idle/inactive UEs, clarification proposals, RS types, functional discussion
Phase:
Phase II discussion
Contributors:
Huawei, HiSilicon, Panasonic, DOCOMO
Discussion Period:
August 17–28, 2020
Decision Status:
For discussion/decision
Target Audience:
3GPP working group members
Year:
2022
Region / City:
Electronic Meeting
Topic:
UE Power Saving Enhancements
Document Type:
Meeting Summary
Organization:
3GPP TSG-RAN WG4
Author:
Moderator (MediaTek Inc.)
Target Audience:
3GPP TSG-RAN WG4 Participants
Period of Effect:
February 21, 2022 – March 03, 2022
Approval Date:
Not Provided
Modification Date:
Not Provided
Organization:
3rd Generation Partnership Project
Working Group:
3GPP TSG‑RAN WG4
Meeting:
3GPP TSG‑RAN WG4 Meeting #102‑e
Meeting format:
Electronic Meeting
Meeting period:
21 February – 03 March 2022
Agenda item:
10.14
Topic:
NR UE Power Saving Enhancements
Document type:
Email discussion summary
Document status:
Information
Source:
Moderator (MediaTek Inc.)
Technical domain:
Telecommunications Engineering / 5G NR
Related technical areas:
Radio Resource Management (RRM), Radio Link Monitoring (RLM), Beam Failure Detection (BFD)
Related release:
3GPP Release 17
Companies contributing:
China Mobile Communications Corporation, Ericsson, MediaTek Inc., Qualcomm, Apple Inc., vivo
Referenced document:
R2-2201989 LS to RAN4 on RLM/BFD relaxation for ePowSav
Primary subject:
UE capability signaling and measurement relaxation mechanisms for RLM and BFD in NR power saving features
Agenda subtopics:
General and work plan; UE measurements relaxation for RLM/BFD; RRM performance requirements
Year:
2022
Meeting:
3GPP TSG-RAN WG4 Meeting #102-e
Date:
21 February – 03 March 2022
Agenda item:
10.14
Organization:
3GPP TSG-RAN Working Group 4
Source:
Moderator (MediaTek Inc.)
Participating organizations:
CMCC; Ericsson; MediaTek Inc.; Qualcomm, Inc.; vivo
Topic:
NR UE Power Saving Enhancements
Technical scope:
RLM/BFD relaxation mechanisms and UE measurement requirements
Related correspondence:
Incoming LS from RAN2 (R2-2201989) on RLM/BFD relaxation for ePowSav
Document type:
Email discussion summary
Work items:
NR_UE_pow_sav_enh feature definition for Release 17
Technical areas:
Radio Resource Management; UE capability signaling; power saving mechanisms
Key concepts:
RLM relaxation; BFD relaxation; SSB-based measurements; CSI-RS-based measurements; beam failure recovery
Proposed feature scope:
UE capability for relaxation of RLM and/or BFD measurements with per-UE granularity and optional capability signaling
Discussion process:
Two-round email discussion covering scope, options, and issue resolution
Year:
2022
Event:
3GPP TSG-RAN WG4 Meeting #102-e
Date:
February 21 – March 3, 2022
Location:
Electronic meeting
Agenda item:
9.35
Source:
Qualcomm Incorporated
Contributors:
InterDigital Finland Oy, Apple, Huawei, HiSilicon, Ericsson, Nokia, Nokia Shanghai Bell, ZTE Corporation, Xiaomi
Document type:
Meeting summary / Technical discussion
Work item:
RP-212622
Objective:
Increase maximum output power for CA and DC
Target submission:
RAN #95e
Proposals included:
Power class adjustments, per-band signaling, LUT method, sum method
Technical scope:
NR uplink, inter-band CA, DC configurations
Year:
2020
Organization:
3GPP TSG RAN WG1
Document Type:
Meeting report / Discussion paper
Region:
International
Author / Moderator:
Samsung
Target Audience:
3GPP member companies
Agenda Item:
8.7.1.2
Discussion Phases:
Phase I, Phase II, Phase III
Topics Covered:
TRS/CSI-RS usage for idle/inactive UEs, proposals for clarification, RS types, functionalities
Date of Meeting:
August 17–28, 2020
Year:
2020
Event:
3GPP TSG RAN WG1 #102-e
Date:
August 17–28, 2020
Document Type:
Meeting contribution
Topic:
TRS/CSI-RS configuration for idle/inactive UEs
Source:
Moderator (Samsung)
Audience:
3GPP RAN WG1 members
Phase:
Phase II discussions
Agenda Items:
8.7.1.2
Proposals Discussed:
TRS/CSI-RS transmission for idle/inactive UEs, availability notification, signaling methods
Companies Involved:
Samsung, Apple, Panasonic, Sony, Ericsson, DOCOMO, Huawei, Intel, Nokia, Qualcomm, ZTE, Spreadtrum, MediaTek, CMCC, Futurewei, HiSilicon
Year:
2022
Region / city:
Global
Theme:
Power saving enhancements in UE
Document Type:
Meeting Summary
Organization:
3GPP TSG-RAN WG4
Author:
MediaTek Inc.
Target Audience:
Industry professionals, engineers, and organizations working on UE power saving enhancements
Period of validity:
February – March 2022
Approval Date:
21 February 2022
Revision Date:
N/A
Year:
2022
Region / City:
International / Virtual Meeting
Subject:
NR uplink power limits for CA and DC
Document Type:
Meeting summary / Technical report
Organization:
3GPP TSG-RAN WG4
Author:
Moderator (Qualcomm Incorporated)
Target Audience:
3GPP members and contributing companies
Period:
February 21 – March 3, 2022
Approval Date:
Not specified
Revision Date:
Not specified
Contributing Companies:
InterDigital Finland Oy, Apple, Huawei, HiSilicon, Ericsson, Nokia, Nokia Shanghai Bell, ZTE Corporation, Xiaomi
Year:
2020
Organization:
3GPP TSG RAN WG1
Document type:
Meeting report / Technical contribution
Source:
Moderator (NTT DOCOMO, INC.)
Agenda item:
7.2.12
Topic:
Aperiodic CSI-RS/TRS triggering with beam switching timing
Target audience:
RAN1 Working Group members
Date of meeting:
August 17–28, 2020
Decision status:
For discussion and decision
Reference documents:
R1-2004831, R1-2005162, R1-2005453
Year:
2025
Region / city:
Baku, Republic of Azerbaijan
Topic:
Telecommunication Development, ITU-D Projects, Resolutions Implementation
Document Type:
Official Report
Organization:
International Telecommunication Union (ITU)
Author:
Telecommunication Development Bureau
Target Audience:
ITU Member States
Period of validity:
2023–2025
Approval Date:
13 October 2025
Amendment Date:
Not provided
Meeting:
3GPP TSG-RAN WG4 Meeting #96-e
Document number:
R4-20xxxxx
Agenda item:
7.3.5 & 7.3.6
Source:
Moderator (LG Electronics)
Title:
Email discussion summary for [96e][210] 5G_V2X_NRSL_RRM
Document for:
Information
Date:
17–28 Aug 2020
Working group:
TSG-RAN WG4
Related specifications:
38.133, 36.133
Related change requests:
R4-2010084, R4-2010085, R4-2011380, R4-2011053, R4-2011382, R4-2010037, R4-2010083, R4-2011054, R4-2011379
Companies involved:
LG Electronics, MediaTek, Huawei, HiSilicon, Qualcomm
Topics:
5G V2X NR sidelink RRM core requirements, performance requirements, interruption requirements, measurement accuracy, test cases
Communication format:
Electronic meeting and e-mail discussion
Technical scope:
Interruption to WAN, synchronization scenarios, LTE SL and NR SL switching, measurement accuracy, scheduling availability, test case planning
Year:
2025
Region / city:
Baku, Republic of Azerbaijan
Topic:
Telecommunication Development
Document Type:
Administrative Document
Organization:
Telecommunication Development Bureau
Author:
Director, Telecommunication Development Bureau
Target Audience:
Conference participants
Action Period:
17–28 November 2025
Approval Date:
30 October 2025
Modification Date:
N/A
Organization:
3rd Generation Partnership Project (3GPP)
Group:
TSG RAN WG1
Meeting:
#102-e e-Meeting
Document Number:
R1-2007151
Agenda Item:
8.1.1
Source:
Moderator (Samsung)
Company:
Samsung
Title:
Moderator summary for multi-beam enhancement: EVM
Work Item:
Rel.17 NR FeMIMO
Frequency Range:
FR2 @ 30 GHz (baseline), applicable also to FR1
Simulation Type:
SLS (baseline), optional LLS
Scenarios:
Dense Urban, High Speed Train, Indoor
Channel Model References:
TR 38.802, TR 38.913, TR 38.901
Performance Metrics:
UE throughput CDF, average and 5% throughput, TCI state update signaling overhead, beam switching latency, RSRP distribution
Traffic Model:
Full buffer
UE Configuration:
Multi-panel UE (3 panels: left, right, back)
Antenna Configuration:
BS (4,8,2,2,2); UE (1,4,2)
Transmission Scheme:
Multi-antenna port transmission
Link Adaptation:
Based on CSI-RS
Intended Purpose:
Discussion and Decision
Year:
2025
Location:
Baku, Republic of Azerbaijan
Event:
World Telecommunication Development Conference 2025 (WTDC-25)
Organizing body:
Telecommunication Development Bureau
Conference body:
ITU-D
Document number:
WTDC-25/DT/1-E
Meeting:
Plenary Meeting
Date of document:
17 October 2025
Language:
English only
Document type:
Draft time management plan
Conference dates:
17–28 November 2025
Sessions included:
Plenary, High-Level Segment, WG-PL, COM1, COM2, COM3, COM4, COM5
Related events:
Global Youth Celebration, ITU-D 30+ Celebration Dinner, Host Country Welcome Reception
Status:
Evolving document updated regularly
Conference:
World Telecommunication Development Conference 2025
Organizing body:
International Telecommunication Union – Telecommunication Development Sector (ITU-D)
Bureau responsible:
Telecommunication Development Bureau
Meeting type:
Plenary Meeting
Document symbol:
WTDC-25/INF/1-E
Date of document:
12 November 2025
Conference venue:
Baku, Republic of Azerbaijan
Conference dates:
17–28 November 2025
Language:
English only
Priority area:
Action Plan, Regional Initiatives and ITU-D Study Group Questions
Related resolutions:
WTDC Resolutions 17 and 71 (Rev. Kigali, 2022); PP-22 Resolutions 169, 205 and 209 (Rev. Bucharest, 2022)
Subject:
Membership growth, diversification and engagement in ITU-D and the evolving role of the private sector
Reporting period:
January 2023 – August 2025
Target audience:
Member States, Sector Members, Associates, Academia, regulators and private sector representatives
Expected action:
WTDC invited to note the document