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Discussion of time and frequency synchronization enhancements for NR NTN and IoT NTN, summarizing company views and proposing updates for UL synchronization based on GNSS-assisted methods.
Year:
2021
Region / City:
Global
Topic:
Time and frequency synchronization
Document Type:
Meeting Report
Organization:
3GPP TSG RAN WG1
Author:
Moderator (MediaTek)
Target Audience:
Industry professionals, IoT NTN stakeholders
Period of Validity:
Ongoing
Approval Date:
Not specified
Date of Changes:
Not specified
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Year:
2021
Note:
Region / City
Topic:
IoT NTN Timing Relationships
Document Type:
Meeting Agenda
Organ / Institution:
3GPP
Author:
Moderator (Sony)
Target Audience:
Industry professionals, engineers working on IoT NTN
Period of Action:
November 2021
Date of Approval:
November 2021
Year:
2021
Period:
January 25 – February 5
Organization:
3GPP TSG RAN WG1
Document Type:
Technical report / meeting summary
Source:
Moderator (MediaTek)
Agenda Item:
8.4.3
Audience:
Discussion and Decision participants
Focus:
UL synchronization and GNSS-assisted pre-compensation in IoT NTN
Related Documents:
TR 36.763, TR 38.821, NR NTN agreements
Year:
2021
Event:
3GPP TSG RAN WG1#106-e
Agenda Item:
8.15.2
Source:
Moderator (Sony)
Type of document:
Feature Lead summary
Scope:
IoT-NTN timing relationship enhancements
Standards reference:
TR 36.763
Target technologies:
NB-IoT, eMTC
Discussion dates:
August 16-27, 2021
Deadline for company contributions:
August 17, 2021, 18:00 UTC
Purpose:
Analysis of contributions and proposals on timing relationships
Companies involved:
Sony, Huawei, and others
Year:
2021
Meeting:
3GPP TSG RAN WG1 Meeting #104e
Agenda Item:
8.15.2
Date:
January 25 – February 5, 2021
Source:
Moderator (MediaTek)
Document Number:
R1-210XXXX
Title:
Summary #3 of AI 8.15.2 Enhancements to Time and Frequency Synchronization
Document For:
Discussion and Decision
Study Item:
IoT Non Terrestrial Network (NTN)
Related Work Item:
NR NTN
Referenced Reports:
TR 36.763, TR 38.821
Technical Scope:
Uplink timing advance and frequency synchronization for IoT NTN
Contributing Companies:
ZTE, Huawei, Qualcomm, Spreadtrum, Lenovo, MotoM, CATT, vivo, Nokia, NSB, Ericsson, Xiaomi, MediaTek, Sony, APT, OPPO, Intel, Asia Pacific Telecom, CMCC, Samsung, Apple, Interdigital
Key Topics:
GNSS-based pre-compensation, Doppler shift mitigation, timing advance calculation, RRC states applicability, reuse of NR NTN agreements
Date:
2025-11-03
Note:
Author(s)
Year:
2025
Region / city:
Global
Topic:
Wireless LAN standards
Document type:
Draft specification
Organization / institution:
IEEE
Author:
Multiple authors from different companies
Target audience:
Engineers and researchers in wireless communications
Period of validity:
N/A
Approval date:
N/A
Amendment date:
N/A
Note:
Year
Year:
2025
Note:
Region / City
Topic:
Wireless LANs, NPCA synchronization
Document Type:
Technical standard
Institution:
IEEE
Author:
Seongho Byeon, Salvatore Talarico, Dongju Cha, Zhenpeng Shi, Juseong Moon, Inaki Val, Shubhodeep Adhikari, Matthew Fischer, Ning Gao, Xiaofei Wang, Kaiying Lu
Target Audience:
Engineers, Standards Committee Members, Wireless Communication Researchers
Context:
A technical document that outlines resolutions for comment IDs related to NPCA synchronization mechanisms in wireless LAN standards.
Year:
2016
Note:
Region / City
Theme:
Clock Synchronization
Document Type:
Technical Standard
Organization / Institution:
LXI Consortium
Target Audience:
Developers, Engineers, and Technical Experts
Approval Date:
8 November 2016
Year:
2021
Region / City:
West Lafayette
Topic:
Educational Technology
Document Type:
User Guide
Institution:
Purdue University
Author:
ITAP
Target Audience:
Faculty, Course Administrators
Effective Period:
Not specified
Approval Date:
6/18/2021
Modification Date:
Not specified
Year:
2021
Period:
January 25 – February 5
Organization:
3GPP TSG RAN WG1
Document Type:
Technical report / meeting summary
Source:
Moderator (MediaTek)
Agenda Item:
8.4.3
Audience:
Discussion and Decision participants
Focus:
UL synchronization and GNSS-assisted pre-compensation in IoT NTN
Related Documents:
TR 36.763, TR 38.821, NR NTN agreements
Year:
2020
Note:
Region / city
Topic:
Time and frequency synchronization, NR NTN
Document type:
Meeting agenda
Organization / institution:
3GPP TSG-RAN WG1
Author:
Thales
Target audience:
Participants of 3GPP TSG-RAN WG1
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
Year:
2026
Region / City:
Malibu, CA
Theme:
Traffic safety, technology, public works
Document type:
Press release
Organization / Institution:
City of Malibu
Author:
Matt Myerhoff
Target audience:
General public, residents, traffic safety advocates
Action date:
February 4, 2026
Date of approval:
January 14, 2026
Date of changes:
N/A
Budget:
$19.1 million
Partners involved:
Caltrans, Los Angeles County
Description:
Press release announcing the completion of a signal synchronization project aimed at improving traffic safety and mobility on Pacific Coast Highway (PCH) in Malibu, part of ongoing efforts to enhance PCH safety.
Year:
2019
Region / City:
Global
Subject:
Data synchronization in the context of Chinese import customs declarations
Document Type:
Implementation Guide
Author:
GS1 China, GAC
Target Audience:
Importers, suppliers, manufacturers, and brand owners exporting goods to China
Effective Period:
From July 1, 2018
Approval Date:
August 2019
Revision Date:
September 2019
Year:
2021
Meeting:
3GPP TSG RAN WG1 Meeting #104e
Agenda Item:
8.15.2
Date:
January 25 – February 5, 2021
Source:
Moderator (MediaTek)
Document Number:
R1-210XXXX
Title:
Summary #3 of AI 8.15.2 Enhancements to Time and Frequency Synchronization
Document For:
Discussion and Decision
Study Item:
IoT Non Terrestrial Network (NTN)
Related Work Item:
NR NTN
Referenced Reports:
TR 36.763, TR 38.821
Technical Scope:
Uplink timing advance and frequency synchronization for IoT NTN
Contributing Companies:
ZTE, Huawei, Qualcomm, Spreadtrum, Lenovo, MotoM, CATT, vivo, Nokia, NSB, Ericsson, Xiaomi, MediaTek, Sony, APT, OPPO, Intel, Asia Pacific Telecom, CMCC, Samsung, Apple, Interdigital
Key Topics:
GNSS-based pre-compensation, Doppler shift mitigation, timing advance calculation, RRC states applicability, reuse of NR NTN agreements
Year:
2018
Location:
Lisbon, Portugal
Subject:
5G MFCN spectrum synchronization
Document type:
Plenary contribution / Technical proposal
Organization:
European Communications Committee (ECC), CEPT
Author:
GSA
Intended audience:
ECC PT1 members, national administrations
Date issued:
15 February 2018
Period covered:
27 February – 2 March 2018
References:
ECC Report “Analysis of the suitability of the regulatory technical conditions for 5G MFCN operation in the 3400-3800 MHz band”; CEPT Report A to the European Commission
Year:
2026
Region / City:
Global
Subject:
Data Synchronization, GS1 Standards, GDSN
Document Type:
Guidance / FAQ
Organization / Institution:
Acxion
Author:
Acxion Data Management Team
Target Audience:
Manufacturers, Suppliers, Private Label Suppliers, Third-Party Suppliers
Effective Period:
2026
Approval Date:
2026-03-01
Related Standards:
GS1 Global Data Synchronization Network (GDSN), Global Trade Item Number (GTIN), Global Location Number (GLN), Global Product Classification (GPC)
XML Serialization of Synchronization Knowledge (MS-XSSK) Open Specifications Technical Documentation
Year:
2009–2016
Document Identifier:
MS-XSSK
Subject Area:
Data synchronization; XML data serialization; protocol structures
Document Type:
Technical specification
Organization:
Microsoft
Publisher:
Microsoft
Series:
Microsoft Open Specifications
Initial Release Date:
July 13, 2009
Latest Revision Date:
May 10, 2016
Revision History:
Versions 0.1–2.0 with major, minor, and editorial updates
Technology Domain:
Data portability and synchronization protocols
Format:
XML schema specification
Applicable Technologies:
Synchronization knowledge representation and data replication systems
Related Standards:
XML schema and network programming standards
Intended Audience:
Software developers and system architects implementing synchronization technologies
Year:
2021
Region / City:
Fort Huachuca, AZ
Subject:
Military contracts, construction, and information technology services
Document Type:
Contract Requirement Description
Organization / Institution:
United States Army
Author:
Not specified
Target Audience:
Government contracting entities
Validity Period:
2021-2025 (Projected)
Approval Date:
January 2021
Amendment Date:
None provided
Year:
2023
Region / City:
Global
Topic:
Variable Frequency Drives
Document Type:
Technical Specification
Author:
Not specified
Target Audience:
Engineers, Technical Professionals
Period of Validity:
Not specified
Approval Date:
Not specified
Modification Date:
Not specified
Standards:
UL 508C, CSA 22.2 No. 274-2017, UL 1995, CE mark 2006/42/EC, IEC 60529, EN 61800-3, IEEE C62.41
Quality Assurance:
In-circuit testing, computerized testing, MTBF 28 years
Description:
Technical specification document describing the mechanical and operational features of the HV600 Variable Frequency Drive (VFD) for industrial applications, with detailed information on performance, construction, standards, and protection mechanisms.