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Technical contribution summarizing proposed solutions and interim conclusions for improving IMS signaling efficiency and call setup procedures over GEO NB-IoT NTN in the context of 3GPP standards.
Year:
2026
Location:
Goa, India
Subject:
IMS enhancement for GEO NB-IoT NTN access
Document Type:
Meeting contribution / Technical conclusion
Organization:
3GPP TSG-WG SA2
Author:
Huawei, HiSilicon
Agenda Item:
20.1.1
Work Item / Release:
FS_5GSAT_Ph4-ARC / Rel-20
Purpose:
Approval
Reference Document:
TR 23.700-19 v1.1.0
Interim Conclusions:
SigComp, SIP header slimming, SDP preconfiguration, shortened call setup, B2BUA support, dedicated bearer for IMS voice data
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Year:
2024
Region / City:
Athens, Greece
Topic:
Networking, IP Addressing, NAT
Document Type:
Technical Report
Organization / Institution:
Ericsson
Author:
Ericsson
Target Audience:
Technical professionals, network engineers
Effective Period:
February 26 – March 1, 2024
Approval Date:
Not provided
Revision Date:
Not provided
Year:
2024
Region / City:
Changsha
Subject:
Vertical Federated Learning, 5GC, NWDAF, AF
Document Type:
Proposal
Organization / Institution:
3GPP SA WG2
Author:
vivo, Huawei, HiSilicon, Tencent, Tencent Cloud, Ericsson
Target Audience:
3GPP SA WG2 members, network engineers, AI model developers
Effective Period:
April 15, 2024 – April 19, 2024
Approval Date:
To be determined
Amendment Date:
To be determined
Year:
2026
Event:
3GPP TSG‑WG SA2#173
Location:
Goa
Country:
India
Dates:
9–13 February 2026
Working Group:
3GPP SA2
Standardization Body:
3rd Generation Partnership Project
Source Organizations:
ZTE; InterDigital
Pen-holder(s):
ZTE; InterDigital
Work Item:
FS_6G_ARC
Agenda Item:
20.6.2
Document Type:
Technical contribution
Topic:
6G Service-Based Architecture (SBA) framework and solution variants
Subject Area:
Network function registration, discovery, selection, and architecture evolution for 6G core networks
Purpose:
Approval
Content Structure:
High-level summary table of solution variants and detailed description of enhancements to NF profiles and discovery procedures
Year:
2026
Region / City:
Goa, India
Theme:
Telecommunications
Document Type:
Meeting Conclusion
Organization:
3GPP TSG-WG SA2
Author:
Huawei, HiSilicon
Target Audience:
Telecommunications professionals, engineers, and network operators
Period of validity:
N/A
Approval Date:
9th Feb 2026
Amendment Date:
N/A
Year:
2026
Location:
Goa, India
Topic:
IMS enhancement for GEO NB-IoT NTN access
Document type:
Meeting contribution / Technical report
Organization:
3GPP TSG-WG SA2
Author:
Huawei, HiSilicon
Audience:
3GPP members, telecom engineers
Agenda item:
20.1.1
Work item / Release:
FS_5GSAT_Ph4-ARC / Rel-20
Reference document:
TR 23.700-19 v1.1.0
Meeting number:
#173
Date:
9–13 February 2026
Summary:
Interim conclusions for Key Issue #2 on IMS enhancement for GEO NB-IoT NTN access including SIP message size reduction, shortened call setup, and B2BUA interoperation
Year:
2025
Region / City:
Dallas, USA
Topic:
Network energy saving, policy control, service adjustment
Document Type:
Contribution
Organization / Institution:
3GPP, NTT DOCOMO, Lenovo, InterDigital, NEC, Apple, Vivo, Nokia, China Mobile, China Telecom, ZTE, Ericsson, MediaTek Inc., Samsung, Huawei, HiSilicon
Author:
Not specified
Target Audience:
3GPP participants, network operators, technical teams
Action Period:
November 17 – 21, 2025
Approval Date:
Not specified
Date of Changes:
Not specified
Agenda Item:
20.4.1
Work Item / Release:
FS_EnergySys_Ph2 / Rel-20
Year:
2024
Region / city:
Orlando, USA
Topic:
5G System, RTP Header Extension, PDU Set Marking, QoS
Document type:
Technical Report
Organization / institution:
Huawei, HiSilicon
Author:
Huawei, HiSilicon
Target audience:
3GPP participants, 5G system developers, network engineers
Period of validity:
November 2024
Approval date:
November 2024
Amendment date:
Not provided
Year:
2026
Region / city:
Goa, India
Topic:
Security protection for sensing service operations
Document Type:
Technical Report
Author:
Ericsson
Target Audience:
3GPP Technical Standards Group members
Period of validity:
N/A
Approval Date:
2026-02-09
Amendment Date:
N/A
Work Item:
FS_Sensing_SEC
Spec:
3GPP TR 33.777
Version:
0.3.0
Agenda Item:
5.2.7
Comments:
The document discusses security solutions for sensing service operations between sensing entities and SF.
Contextual description:
Technical report on security protection for sensing service operations in a 5G environment.
Year:
2026
Location:
Goa, India
Organization:
3GPP TSG-SA WG2
Document Type:
Meeting Report
Agenda Item:
20.1.1
Work Item / Release:
FS_5GSAT_Ph4_ARC / Rel-20
Author / Contributor:
MediaTek Inc.
Target Audience:
3GPP members and IMS implementers
Subject:
IMS enhancement, GEO NB-IoT NTN, static SDP pre-definition
Date of Meeting:
February 09–13, 2026
Proposal Status:
Interim conclusion
References:
RFC 4566
Year:
2026
Region / city:
Goa, India
Topic:
Security and privacy for local access
Document type:
Draft
Organization / institution:
3GPP TSG-SA3
Author:
ZTE, China Telecom, Nokia
Target audience:
Members of 3GPP TSG-SA3
Effective period:
2026
Approval date:
Pending
Amendment date:
Pending
Contextual description:
Document outlining conclusions and security considerations for Key Issue #2 in the context of NR Femto GW integration and N4 interface protection.
Year:
2026
Region / City:
Goa, India
Topic:
Voice over GEO links, Satellite Communication
Document Type:
Technical Paper
Author:
Skylo Technologies, ViaSat, Boost Mobile Network, EchoStar
Target Audience:
3GPP participants, telecommunications engineers, network architects
Effective Period:
February 9-13, 2026
Approval Date:
February 9, 2026
Modification Date:
Not specified
Keywords:
GEO, Voice over Satellite, Call Setup Time (CST), IMS, SIP, Binary Encoding, NB-IoT, NTN
Abstract:
The document outlines interim conclusions for Key Issue #2 related to the optimization of voice call setup over GEO links for emergency communication, focusing on call setup time (CST) and protocol efficiency.
Year:
2024
Region / City:
Orlando
Theme:
5G System, RTP Header Extension, PDU Set Marking
Document Type:
Technical Report
Organization / Institution:
3GPP
Author:
Huawei, HiSilicon
Target Audience:
5G System Engineers, Network Operators, RTP Specialists
Period of validity:
N/A
Approval Date:
N/A
Date of Changes:
N/A
Year:
2024
Organization:
3GPP SA4-e RTC SWG
Work item code:
FS_5G_RTP_Ph2
Category:
B (addition of feature)
Release:
19
Source to WG:
Huawei, HiSilicon
Source to TSG:
SA WG 4
Date submitted:
11-10-2024
Affected components:
UICC apps, ME, Radio Access Network, Core Network
Clauses affected:
4, 4.1, 4.2
References:
3GPP TS 29.571, 3GPP TS 38.415, RTP Parameters (iana.org)
Type of document:
Change Request
Summary:
Guidelines for marking PDU Sets in RTP streams for lone and multiplexed PDUs, including QoS handling and scenarios where SSRC-based packet filtering cannot be applied.
Year:
2026
Region / City:
Goa, India
Topic:
IMS signaling transport for GEO NB-IoT NTN access
Document Type:
Meeting Contribution
Organization / Institution:
3GPP
Author:
vivo
Target Audience:
3GPP TSG-SA WG2 members
Period of validity:
February 2026
Approval Date:
Not specified
Modification Date:
Not specified
Agenda Item:
20.1.1
Work Item / Release:
FS_5GSAT_Ph4_ARC / Rel-20
Abstract:
Updated conclusion on IMS signaling transport for GEO NB-IoT NTN access
Context:
Document proposing conclusions on IMS signaling transport for GEO NB-IoT NTN access.
Year:
2025
Region / city:
Göteborg, SE
Theme:
IMS voice call optimization via NB-IoT GEO
Document Type:
Technical Specification
Organization:
Huawei, HiSilicon, China Telecom, CSCN
Author:
Not specified
Target Audience:
Telecom engineers, 3GPP members
Period of validity:
Not specified
Approval Date:
Not specified
Date of Changes:
Not specified
Year:
2026
Region / City:
Goa, India
Theme:
Telecommunications
Document Type:
Meeting Conclusion
Organization:
3GPP TSG-WG SA2
Author:
Huawei, HiSilicon
Target Audience:
Telecommunications professionals, engineers, and network operators
Period of validity:
N/A
Approval Date:
9th Feb 2026
Amendment Date:
N/A
Year:
2026
Location:
Goa, India
Topic:
IMS enhancement for GEO NB-IoT NTN access
Document type:
Meeting contribution / Technical report
Organization:
3GPP TSG-WG SA2
Author:
Huawei, HiSilicon
Audience:
3GPP members, telecom engineers
Agenda item:
20.1.1
Work item / Release:
FS_5GSAT_Ph4-ARC / Rel-20
Reference document:
TR 23.700-19 v1.1.0
Meeting number:
#173
Date:
9–13 February 2026
Summary:
Interim conclusions for Key Issue #2 on IMS enhancement for GEO NB-IoT NTN access including SIP message size reduction, shortened call setup, and B2BUA interoperation
Year:
2025
Region / City:
Global / 3GPP Members
Subject:
Telecommunications; NB-IoT; IMS Voice; GEO Satellite
Document Type:
Technical contribution / Agreement
Organization:
3GPP, vivo Mobile Communication Co.
Authors:
Contributors from vivo, China Mobile, MediaTek, ZTE, Verizon, Ericsson, CATT, Nokia, Skylo, Thales, China Telecom, Spreadtrum, Xiaomi, OPPO, China Unicom, LG Electronics, Apple, Samsung, NTT DOCOMO, CSCN, SHARP
Target Audience:
3GPP Working Groups RAN1, RAN2, SA2, SA4
Period of Effect:
2025 – until next update
Approval Date:
August 2025
References:
3GPP TR 23.700-19, TS 26.132, TR 36.321, TR 36.763, TR 38.811, TR 38.821, FS_ULBC Tdocs
Year:
2026
Region / city:
Goa, India
Topic:
IMS Voice over GEO Satellite
Document Type:
Specification
Organization:
3GPP
Author:
Nokia
Target audience:
3GPP members
Period of validity:
N/A
Approval date:
N/A
Modification date:
N/A
Year:
2026
Region / city:
Goa, India
Topic:
Change request for GEO voice data transport
Document Type:
Change Request
Organization:
3GPP
Author:
vivo
Target Audience:
3GPP Working Groups, SA2
Period of Validity:
N/A
Approval Date:
2026-01-30
Amendment Date:
N/A
Proposed change:
Documentation of required normative work for GEO voice data transport over UP IP.
Consequences if not approved:
GEO voice data transport over UP IP will not be supported.