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This document is a summary of the discussions and proposals made during the 3GPP RAN WG1#107-e meeting on timing relationships for IoT-NTN, focusing on Koffset and Kmac handling, PDCCH monitoring, and related issues.
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
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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
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
Year:
2023
Region / City:
Incheon, South Korea
Topic:
NR-NTN and IoT-NTN
Document Type:
Meeting Report
Organization:
3GPP TSG-RAN WG2
Author:
Vice Chairman (ZTE Corporation)
Target Audience:
3GPP members
Period of validity:
May 22-26, 2023
Approval Date:
Not specified
Modification Date:
Not specified
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:
2025
Region / City:
Bengaluru, India
Topic:
Telecommunications, 3GPP Standards
Document Type:
Change Request
Organization / Institution:
3GPP TSG-RAN4
Author:
vivo, Apple, CATT, China Telecom, Echostar, Ericsson, Globalstar, Hisilicon, Huawei, Inmarsat, LGE, Mediatek, Nokia, OPPO, Qualcomm, Samsung, Skyworks, Thales, viasat, Xiaomi, ZTE
Target Audience:
Telecommunications professionals, standardization bodies
Period of Validity:
2025-08-29
Approval Date:
2025-08-29
Revision History:
Revision 12.3
Year:
2024
Region / City:
Athens, Greece
Topic:
NR-NTN and IoT-NTN
Document Type:
Report
Organizational Body:
3GPP TSG-RAN WG2
Author:
Vice Chairman (ZTE Corporation)
Target Audience:
Participants of 3GPP TSG-RAN WG2
Period of Validity:
February 26th – March 1st, 2024
Approval Date:
February 26th, 2024
Date of Changes:
None
Year:
2025
Location:
Bangalore, India
Topic:
IoT-NTN TDD, Stage 2 Change Requests
Document type:
Technical discussion document
Organization:
3GPP TSG-RAN WG2
Author:
Iridium Satellite LLC
Audience:
RAN2 members and contributing companies
Deadline for input:
August 1, 2025, 08:00 UTC
References:
RP-243293 (Madrid, Dec 2024), R1-2504883 (St. Julians, May 2025)
Contact persons:
Andjela Ilic-Savoia (Iridium), Yitao Mo (vivo), Zhihong Qiu (ZTE), Ping Yuan (Nokia), Xubin (Huawei, HiSilicon)
Scope:
Open issues related to Stage 2 CR for IoT-NTN TDD Rel-19 WI
Purpose:
Discussion and endorsement of proposed changes
Affected specifications:
TS 36.300, TS 36.102
Relevant bands:
1616–1626.5 MHz
Year:
2021
Note:
Region / city
Theme:
IoT-NTN Timing Relationship Enhancements
Document type:
Meeting Agenda
Organization:
3GPP TSG RAN WG1
Author:
Moderator (Sony)
Target audience:
Industry professionals, engineers
Approval date:
May 10th – 27th, 2021
Year:
2026
Region / City:
Goteborg, Sweden
Theme:
5G NR-NTN, IoT-NTN, 6G
Document Type:
Meeting Report
Organization:
3GPP TSG-RAN WG2
Author:
Session Chair (ZTE Corporation)
Target Audience:
3GPP participants, engineers, researchers
Period of Action:
February 9th – 13th, 2026
Approval Date:
February 9th, 2026
Date of Changes:
N/A
Year:
2026
Region / City:
Goteborg, Sweden
Theme:
NR-NTN and IoT-NTN
Document Type:
Meeting Report
Organization:
ZTE Corporation
Author:
Session Chair (ZTE Corporation)
Target Audience:
3GPP TSG-RAN WG2 participants
Period of Validity:
February 9th – 13th, 2026
Approval Date:
February 9th, 2026
Date of Changes:
None
Year:
2024
Location:
Fukuoka, Japan
Topic:
NR-NTN and IoT-NTN session reports
Document type:
Meeting report / Technical document
Organization:
3GPP TSG-RAN WG2
Author:
Session Chair (ZTE Corporation)
Target audience:
Member companies and working group participants
Agenda items:
9.3
Period:
May 20–24, 2024
Deadlines:
May 22, 2024 (feedback), May 23–24, 2024 (rapporteur summaries)
Related releases:
Rel-17, Rel-18, Rel-19
Content focus:
IoT NTN enhancements, NR NTN enhancements, AI/ML PHY, Positioning, UAV, Network Energy Saving
Offline discussions:
AT126 [301–304]
Breakout sessions:
ASN.1 review, NR/IoT NTN CBs, AI/ML Mobility, Rel-18/19 technical items
Year:
2026
Region / City:
Goteborg, Sweden
Topic:
NR-NTN, IoT-NTN
Document Type:
Meeting Report
Organization:
3GPP TSG-RAN WG2
Author:
Session Chair (ZTE Corporation)
Target Audience:
3GPP Participants
Period of Action:
February 9th – 13th, 2026
Approval Date:
February 13th, 2026
Date of Amendments:
N/A
Year:
2026
Region / City:
Goteborg, Sweden
Topic:
NR-NTN and IoT-NTN
Document Type:
Meeting Report
Organization:
3GPP TSG-RAN WG2
Author:
Session Chair (ZTE Corporation)
Target Audience:
3GPP Meeting Participants
Period of Action:
February 9th – 13th, 2026
Date of Approval:
February 9th, 2026
Date of Changes:
N/A
Year:
2026
Region / City:
Goteborg, Sweden
Topic:
NR-NTN and IoT-NTN
Document Type:
Meeting Report
Organization / Institution:
3GPP TSG-RAN WG2
Author:
Session Chair (ZTE Corporation)
Target Audience:
Participants of the 3GPP TSG-RAN WG2 meeting
Effective Period:
February 9th – 13th, 2026
Approval Date:
February 9th, 2026
Date of Last Change:
N/A
Year:
2026
Event:
3GPP TSG RAN WG1 Meeting #124
Location:
Gothenburg, Sweden
Date:
9–13 February 2026
Agenda Item:
8.7.2
Document Number:
R1-2601117
Organization:
3GPP TSG RAN Working Group 1
Source:
Moderator (Sony)
Moderator:
Martin Beale
Technical Domain:
IoT Non-Terrestrial Networks (IoT-NTN)
Release Version:
Rel-19
Document Type:
Feature Lead Summary / Technical discussion document
Related Specifications:
3GPP TS 36.211; 3GPP TS 36.213
Contributing Organizations:
Sony, Ericsson, Lenovo, LGE, Gatehouse Satcom, Nokia, InterDigital, ETRI, vivo, Sharp, Xiaomi, Spreadtrum (UNISOC), TCL, ZTE, Nordic Semiconductor, CMCC, OPPO
Primary Topics:
IoT-NTN maintenance issues, NPUSCH format 1 enhancements, uplink capacity improvements, OCC schemes, Early Data Transmission signaling reduction, CB-Msg3 and CB-Msg4 procedures
Referenced Contributions:
R1-26002257, R1-2601028, R1-2600076, R1-2600167, R1-2600317, R1-2600732, R1-2601063, R1-2601249, R1-2600478
Purpose:
Discussion
Contact List:
Points of contact from participating companies for the IoT-NTN work item discussion
Year:
2025
Location:
St. Julian’s, Malta
Organization:
3rd Generation Partnership Project (3GPP)
Working Group:
TSG-RAN WG1
Meeting:
TSG-RAN WG1 Meeting #121
Document type:
Draft Change Request
Specification:
3GPP TS 36.212
Current specification version:
18.1.0
Release:
Rel-19
Category:
B (addition of feature)
Work item code:
IoT_NTN_Ph3-Core
Source:
FUTUREWEI
Date:
27 May 2025
Affected clause:
6.4.3.1
Affected specifications:
36.213
Technical scope:
LTE radio access network; IoT over non-terrestrial networks
Topic:
Downlink Control Information format N0 and OCC support for NPUSCH scheduling
Year:
2021
Organization:
3GPP TSG RAN WG1
Meeting:
R1-21xxxxxe, May 10–27, 2021
Agenda Item:
8.15.3
Title:
FL summary #1 of AI 8.15.3: Timing relationships for IoT-NTN
Authors:
Sony (Moderator), contributions from Apple, Ericsson, ZTE
Document Type:
Meeting report / technical summary
Intended Audience:
Companies participating in RAN1 discussions
Main Topics:
eMTC and NB-IoT timing relationships, timing advance, PDCCH to PRACH, PUSCH timing, GNSS measurements, EDT support
Referenced Documents:
105-e-NR-NB_IoT_eMTC-03, TS 36.213A
Action Required:
Company review and feedback by May 24, 2021
Distribution:
RAN1 members and contributors
Year:
2024
Region / City:
Athens, Greece
Topic:
Frame structure and timing aspects for Rel-19 Ambient IoT
Document Type:
Discussion Paper
Organization / Institution:
3GPP TSG-RAN WG1
Author:
Moderator (vivo)
Target Audience:
Participants of 3GPP TSG-RAN WG1
Period of Validity:
February 26th – March 1st, 2024
Approval Date:
N/A
Modification Date:
N/A