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Technical report summarizing agreements and design considerations for implementing 14 HARQ processes in DL for LTE-MTC, detailing PDSCH scheduling delay configurations, HARQ-ACK delay alternatives, bit encoding strategies, and potential joint encoding solutions discussed during RAN1 #105-e.
Year:
2021
Event:
3GPP TSG-RAN WG1 Meeting #105-e
Document type:
Feature Lead Summary
Source:
Moderator (Ericsson)
Topic:
LTE-MTC, NB-IoT, HARQ processes, PDSCH scheduling delay
Target audience:
3GPP RAN1 participants
Meeting dates:
May 10–27, 2021
Version:
R1-21xxxxxe
Agreements referenced:
RAN1 #102-e, #103-e, #104-e, #104-bis-e, #105-e
Purpose:
Discussion and decision on HARQ-ACK delay and PDSCH scheduling delay solutions
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Year:
2021
Region / City:
N/A
Topic:
NB-IoT, LTE-MTC, enhancements
Document type:
Change request
Author:
Motorola Mobility
Target audience:
RAN1 working group
Period of validity:
N/A
Approval date:
2021-11-01
Change request date:
2021-11-01
Release:
Rel-17
Work item code:
NB_IOTenh4_LTE_eMTC6-Core
Category:
B
Reason for change:
Introduction of additional enhancements for NB-IoT
Summary of change:
Support for NB-IoT features according to RAN1 agreements: 16QAM for unicast in uplink and downlink
Clauses affected:
16.2.1.1.1, 16.2.2, 16.4.1.3, 16.4.1.5, 16.4.1.5.1, 16.5.1.1, 16.5.1.2
Other affected specifications:
TS 36.211, TS 36.212
Change history:
revision history available
Test specifications:
N/A
O&M Specifications:
N/A
Year:
2021
Date:
April 12–20, 2021
Event:
3GPP TSG-RAN WG1 Meeting #104-bis-e
Agenda Item:
8.9.2
Document Type:
Technical meeting contribution
Organization:
3GPP TSG-RAN Working Group 1
Source:
Moderator (Ericsson)
Topic:
LTE-MTC enhancements for Release 17
Technical Area:
NB-IoT and LTE-MTC radio access technology
Feature:
Support of additional PDSCH scheduling delay for 14 HARQ processes in downlink
Subject:
HARQ-ACK delay determination methods
Alternatives Discussed:
Alt-1 expression based on subframe types; Alt-2 legacy absolute subframe approach
Companies Referenced:
Nokia, NSB, ZTE, Lenovo, Motorola Mobility
Purpose:
Discussion and Decision
Related Work Item:
Additional enhancements for NB-IoT and LTE-MTC
Standardization Context:
3GPP Release 17 development
Year:
2021
Dates:
19–27 May 2021
Meeting:
3GPP TSG-RAN WG1 Meeting #105-e
Agenda Item:
8.6.1.1
Topic:
Reduced maximum UE bandwidth for RedCap
Work Item:
Rel-17 support of reduced capability (RedCap) NR devices
Source:
Moderator (Ericsson)
Document Type:
Feature Lead Summary
Related Contributions:
[3]–[34]
Related Specifications:
3GPP TS 38.331 Appendix B2
Priority Tags:
High Priority, Medium Priority
Check Points:
5/21, 5/25, 5/27
Scope:
Initial DL BWP during and after initial access
Companies Involved:
Huawei, HiSi, Qualcomm, Xiaomi, ZTE, Sanechips, vivo, OPPO
Target Group:
RAN1 delegates and contributing companies
Year:
2021
Meeting:
3GPP TSG-RAN WG1 Meeting #105-e
Date:
19–28 May 2021
Agenda Item:
8.2.3
Document Type:
Technical meeting summary
Organization:
3GPP TSG-RAN Working Group 1
Source:
Moderator (Ericsson)
Topic:
Enhancements for PUCCH Formats 0/1/4
Related Work Item:
Supporting NR from 52.6 GHz to 71 GHz (Rel-17)
Technical Area:
5G NR radio access technology
Subject:
Frequency domain resource mapping and configuration of resource blocks for enhanced PUCCH formats
Participating Companies:
Futurewei, Intel, CATT, ZTE, NTT DOCOMO, Nokia, OPPO, Huawei, Apple, InterDigital, MediaTek, Ericsson, LG
Decision Context:
Discussion and recommendation prior to agreement within RAN1 and coordination with RAN4
Referenced Communication:
Email thread [105-e-NR-52-71GHz-02] with checkpoints on May 25 and May 27, 2021
Year:
2021
Organization:
3GPP TSG-RAN
Meeting:
WG1 Meeting #105-e
Document type:
Meeting Report / Technical Summary
Source:
Moderator (Ericsson)
Agenda item:
8.3.2
Target audience:
RAN1 members, telecom engineers
Discussion period:
May 10 – 27, 2021
Topics:
NR-U, URLLC, CG harmonization, HARQ processes, RRC parameters
Decisions:
Options for enabling/disabling CG-UCI and CG-DFI procedures for unlicensed bands
Observations:
Comparison of configuration options and company preferences
Year:
2023
Region / City:
Athens, Greece
Topic:
IoT NTN, HARQ feedback
Document Type:
Discussion and decision
Organization / Institution:
3GPP
Author:
Moderator (Lenovo)
Target Audience:
3GPP members, technical experts
Effective Period:
2023-02-27 to 2023-03-03
Approval Date:
Not specified
Modification Date:
Not specified
Year:
2022
Region / City:
Electronic Meeting
Theme:
IoT NTN HARQ Enhancements
Document Type:
Report
Organization / Institution:
3GPP
Author:
CMC
Target Audience:
Companies involved in 3GPP discussions
Period of Validity:
2022-10-10 to 2022-10-19
Approval Date:
2022-10-18
Modification Date:
None
Meeting:
3GPP RAN WG2 Meeting #113e
Agenda Item:
8.10.2.2
Document Number:
R2-2102013e
Source:
InterDigital
Document Status:
Draft
Document For:
Discussion, Decision
Date:
January 25 – February 5, 2021
Topic:
HARQ timer behavior in Non-Terrestrial Networks
Technology:
5G NR
Specification References:
TS 38.321
Organizations Mentioned:
3GPP RAN WG2
Participating Companies:
APT, Panasonic, Huawei, HiSilicon, Lenovo, CATT, Spreadtrum, Samsung, Intel, MediaTek, LG, Nokia, OPPO, ZTE, Qualcomm, Xiaomi, Ericsson
Related Release:
Release 17
Deadlines:
February 1–2, 2021
Year:
2021
Region / city:
e-Meeting (Virtual)
Subject:
HARQ operation and enhancements for NB-IoT/eMTC over NTN
Document type:
Technical contribution / meeting report
Organization:
3GPP TSG RAN WG1
Author:
Moderator (Samsung)
Agenda item:
8.15.4
Purpose:
Discussion and decision on potential enhancements
Target audience:
RAN working group members
Reference documents:
RAN#91-e, RAN#92, TR 36.763
Year:
2020
Note:
Region / city
Topic:
HARQ process enhancement for NTN
Document type:
Meeting document
Organization:
3GPP TSG RAN WG1
Target audience:
Industry professionals, engineers
Year:
2020
Region / city:
Global
Topic:
HARQ enhancement for NTN
Document type:
Meeting Summary
Organization:
3GPP TSG RAN WG1
Author:
ZTE
Target audience:
3GPP participants, industry stakeholders
Action period:
2020
Approval date:
August 17th – 28th, 2020
Date of changes:
Not specified
Year:
2022
Meeting:
3GPP TSG-RAN WG2 #117-e
Meeting Type:
Electronic meeting
Meeting Period:
21 February – 3 March 2022
Agenda Item:
4.1
Document Number:
R2-2203572
Source:
Ericsson (Rapporteur)
Contact Person:
Emre A. Yavuz ([email protected]
Note:
)
Organization:
3GPP TSG-RAN WG2
Topic:
NB-IoT R15, 2 HARQ processes and HARQ RTT timer
Related Documents:
R2-2203480; R2-2203486; R2-2203495; R2-2203496
Document For:
Discussion, Decision
Scope:
Discussion of whether correction is needed and work on the related CRs
Intended Outcome:
Report and revised CRs if needed
Deadline:
24 February 2022 12:00 UTC
Type of Document:
Technical meeting report and discussion paper
Year:
2026
City:
Gothenburg
Country:
Sweden
Meeting:
3GPP TSG RAN WG1 #124
Agenda item:
10.5.4.3
Organization:
3GPP TSG RAN Working Group 1
Source:
Moderator (OPPO)
Document number:
R1-2601540
Document status:
Draft
Document for:
Discussion and Decision
Topic:
6G Radio (6GR) HARQ operation
Technical field:
Wireless communications and radio access technology
Related standards:
TR 38.914, TR 38.921, TR 38.922
Frequency scope:
Up to 52.6 GHz including FR1 and FR2-1
Key technologies:
HARQ, OFDM-based waveforms, LDPC, Polar Code, MIMO
Scope:
Physical layer control, data scheduling and retransmission mechanisms
Working group area:
RAN1 physical layer study for 6G radio access
Timeframe of meeting:
09–13 February 2026
Year:
2021
Organization:
3GPP TSG RAN WG1
Location:
e-Meeting
Document Type:
Technical Contribution
Topic:
HARQ Enhancements, IoT over NTN
Author/Source:
Moderator (Samsung)
Agenda Item:
8.15.4
Target Audience:
RAN1 Working Group Members
Study Period:
RAN#91-e to RAN#105-e
Release Reference:
Rel-17
Technical Reference:
TR 36.763
Year:
2021
Date:
April 12–20, 2021
Event:
3GPP TSG-RAN WG1 Meeting #104-bis-e
Agenda Item:
8.9.2
Document Type:
Technical meeting contribution
Organization:
3GPP TSG-RAN Working Group 1
Source:
Moderator (Ericsson)
Topic:
LTE-MTC enhancements for Release 17
Technical Area:
NB-IoT and LTE-MTC radio access technology
Feature:
Support of additional PDSCH scheduling delay for 14 HARQ processes in downlink
Subject:
HARQ-ACK delay determination methods
Alternatives Discussed:
Alt-1 expression based on subframe types; Alt-2 legacy absolute subframe approach
Companies Referenced:
Nokia, NSB, ZTE, Lenovo, Motorola Mobility
Purpose:
Discussion and Decision
Related Work Item:
Additional enhancements for NB-IoT and LTE-MTC
Standardization Context:
3GPP Release 17 development
Year:
2026
Region / city:
Gothenburg, Sweden
Topic:
6G Radio technology, HARQ operation
Document Type:
Draft
Organization:
3GPP TSG RAN WG1
Author:
Moderator (OPPO)
Target audience:
Researchers and engineers in telecommunications
Period of validity:
February 09-13, 2026
Approval date:
N/A
Date of changes:
N/A
Year:
2026
Region / City:
Gothenburg, Sweden
Theme:
6G Radio Access Technology, HARQ
Document Type:
Meeting Draft
Author:
Moderator (OPPO)
Target Audience:
RAN WG members, 6G researchers, telecommunications engineers
Period of Action:
February 09 – 13, 2026
Approval Date:
N/A
Date of Modifications:
N/A
Agenda Item:
10.5.4.3
Discussion Type:
Discussion and Decision
Scope:
6G Radio, HARQ Operations
Related Documents:
RP-253876, TR38.914, RP-250810, TR 38.921, TR 38.922
Technical Focus:
Hybrid Automatic Repeat Request (HARQ)
Network:
6G, LTE, NR
Standardization Area:
RAN
Contributions:
Technical proposals and outcomes for HARQ operations in 6GR
Year:
2026
Location:
Gothenburg, Sweden
Subject:
6G Radio Access, HARQ operation
Document type:
Draft contribution for working group meeting
Organization:
3GPP TSG RAN WG1
Author:
Moderator (OPPO)
Agenda item:
10.5.4.3
Purpose:
Discussion and Decision
Scope:
Frequency ranges up to 52.6 GHz, FR1 to FR2-1, 6GR standalone architecture
Standards referenced:
TR38.914, TR38.921, TR38.922, RP-250810, RP-253876
Technical focus:
HARQ operation, MIMO, waveform and modulation, frame structure, channel coding, spectrum utilization
Year:
2021
Organization:
3GPP TSG RAN WG1
Document type:
Meeting report
Subject:
HARQ enhancements and scheduling in NTN scenarios
Author:
Moderator (ZTE)
Participating companies:
OPPO, Huawei, Intel, Lenovo, Panasonic, Xiaomi, Qualcomm, CATT, ZTE, MTK, Spreadtrum, China Telecom, ETRI, Apple, vivo, LG, Ericsson, APT, InterDigital, CMCC, Samsung, Nokia, Sony
Target audience:
3GPP members and participating companies
Meeting dates:
January 25 – February 5, 2021
Agenda item:
8.4.3
Key topics:
Enhanced HARQ process ID indication, HARQ codebook enhancements, PDSCH/PUSCH scheduling restrictions, HARQ feedback restrictions, performance enhancements
Decisions and proposals:
Options for DCI formats 0-0/1-0, 0-1/1-1, 0-2/1-2 and recommended majority views on HARQ process ID field enhancements
Appendices:
Detailed proposals and company-specific positions
Year:
2026
Location:
Gothenburg, Sweden
Topic:
6G Radio Access Network, HARQ operation
Document type:
Draft contribution
Organization:
3GPP TSG RAN WG1
Author:
Moderator (OPPO)
Agenda item:
10.5.4.3
Purpose:
Discussion and Decision
Frequency ranges:
FR1, FR2-1 up to 52.6 GHz
Technical focus:
Stand-alone architecture, HARQ operation, MIMO, waveform design, spectrum utilization
Target audience:
RAN1 working group members
Date of meeting:
February 09 – 13, 2026