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Feedback & Requirements

Liaison Statements & Inputs

Liaison statements 5G-MAG has sent to and received from 3GPP, MPEG and ETSI MEC, listed newest first.

Overview

A liaison statement (LS) is a formal message exchanged between standards groups. In the tables below, Out means a document that 5G-MAG sent to the body, and In means a reply or document that 5G-MAG received. Where a note follows an entry (for example "withdrawn", "approved", "postponed", "revised into ..."), it records the current status of that document or the reply relationship between an outgoing item and the incoming response it triggered.

The tables are grouped by standards body (3GPP, MPEG, ETSI MEC) and listed newest first. Each link downloads the document (a ZIP or office file) from the relevant document server.

warning

The working-group titles and some reply threads below have not all been reconfirmed against the source document servers. Confirm the exact meeting, document number and status before relying on them.

3GPP: Incoming / Outgoing LS and Inputs

YearIn/OutMeetingTitle
2026Out3GPP SA4#136S4-261155 - 5G-MAG’s Support to 3GPP Study Items and Work Items
2026Out3GPP SA4#136S4-260903 - LS Reply on Service APIs for MBS User Services
2026Out3GPP SA4#136S4-260902 - High-level design and service APIs for MBS User Service Announcements (withdrawn)
2026Out3GPP CT3#147C3-262023 - High-level design and service APIs for MBS User Service Announcements
2026Out3GPP CT4#135C4-262234 - High-level design and service APIs for MBS User Service Announcements
2026In3GPP CT4#135C4-262311 - Reply LS on High-level design and service APIs for MBS User Service Announcements (CT4 reply to 5G-MAG, postponed)
2026In3GPP CT4#135C4-262052 - Reply LS on High-level design and service APIs for MBS User Service Announcements (Qualcomm, reply to 5G-MAG, revised into C4-262311)
2026Out3GPP CT3#146C3-261386 - High-level design and service APIs for MBS User Service Announcements
2026Out3GPP CT3#146C3-261385 - LS Reply on Service APIs for MBS User Services
2026In3GPP CT3#146C3-261579 - LS Reply on Service APIs for MBS User Services (CT3 reply to 5G-MAG, approved)
2026Out3GPP CT4#134C4-261261 - LS Reply on Service APIs for MBS User Services
2026Out3GPP CT4#134C4-261260 - High-level design and service APIs for MBS User Service Announcements
2026Out3GPP SA4#135-bis-eS4-260708 - High-level design and service APIs for MBS User Service Announcements
2026Out3GPP SA4#135-bis-eS4-260707 - LS Reply on Service APIs for MBS User Services
2026In3GPP SA4#135-bis-eS4-260734 - High-level design and service APIs for MBS User Service Announcements (SA4 reply to 5G-MAG, approved)
2026Out3GPP CT4#133C4-260367 - Reply LS on Service APIs for MBS User Services
2026Out3GPP CT3#145C3-260506 - LS Reply on Service APIs for MBS User Services
2025Out3GPP CT4#132LS on Service APIs for MBS User Services
2025Out3GPP CT3#144LS on Service APIs for MBS User Services
2025Out3GPP SA4#134LS on Service APIs for MBS User Services
2025Out3GPP SA4 Video AHG post 132[FS_Beyond2D] Creation of a 5G-MAG repository
2025Out3GPP PCG#545G-MAG MRP Report: Update on 5G-MAG’s Work
2025Out3GPP SA4#131[DEMOS] Reference Tools: Demonstrators at SA4#131 Meeting
2024Out3GPP SA4#130LS on uplink media delivery features for 5GMSu and RTC
2024Out3GPP SA4 MBS AHG post 129-eLS on 5G-MAG INSIGHTS, Reference Tools and resolution of issues in 3GPP media delivery specifications
2024Out3GPP SA4 MBS AHG post 127-bis-e5G-MAG Views on FS_AMD_Advanced Media Delivery (Tdoc/URL to verify)
2024Out3GPP RAN#105LS on 5G-MAG activities on LTE-based 5G Terrestrial Broadcast and ETSI TS 103 720
2024Out3GPP SA1#107LS on 5G-MAG Work on NTN for Media Distribution: Devices, services, communication mechanisms and deployment models
2024Out3GPP SA4#127Progress on Reference Tools Projects January'24
2023Out3GPP RAN#1025G-MAG Report on Time and Frequency Interleaving for 3GPP broadcast services
2023Out3GPP SA4#122On ETSI TS 103 720 Second Version
2022Out3GPP SA4#121Reply LS: Clarification and fixes to 3GPP TS 26.512
2022Out3GPP SA4#121Clarification and fixes to 3GPP TS 26.512
2022Out3GPP SA4#120-e5G-MAG Target 2023 - Reference Tools for 5G-based media services
2021Out3GPP TSG RAN#91-eWID on new bands and bandwidth allocation for LTE-based 5G terrestrial broadcast

MPEG: Incoming / Outgoing LS and Inputs

These are inputs to MPEG (Moving Picture Experts Group), organised under ISO/IEC JTC 1/SC 29. The meeting column names the SC 29 working group that received each contribution (for example WG 3, WG 4 and WG 7, which cover different parts of the MPEG immersive and coding work).

YearIn/OutMeetingTitle
2025OutMPEG ISO/IEC JTC 1/SC 29/WG 3m74566 - [SD] XR and MPEG-I in Reference Tools
2025OutMPEG ISO/IEC JTC 1/SC 29/WG 4m73733 - V3C and Haptic Immersive platform release on 5G-MAG reference tools (MIV)
2025OutMPEG ISO/IEC JTC 1/SC 29/WG 7m73724 - V3C and Haptic Immersive platform release on 5G-MAG reference tools (V-PCC and Haptics)
2025OutMPEG ISO/IEC JTC 1/SC 29/WG 3m73539 - [SD] XR and MPEG-I in Reference Tools
2025OutMPEG ISO/IEC JTC 1/SC 29/WG 3m72702 - [SD] XR and MPEG-I in Reference Tools
2025OutMPEG ISO/IEC JTC 1/SC 29/WG 3m71455 - [SD] XR and MPEG-I in Reference Tools
2024OutMPEG ISO/IEC JTC 1/SC 29/WG 3m70269 - [SD] XR and MPEG-I in Reference Tools
2024OutMPEG ISO/IEC JTC 1/SC 29/WG 3m69262 - [SD] XR and MPEG-I in Reference Tools
2024OutMPEG ISO/IEC JTC 1/SC 29/WG 3m67862 - [SD] XR and MPEG-I in Reference Tools
2024OutMPEG ISO/IEC JTC 1/SC 29/WG 3m66555 - [SD] XR and MPEG-I in Reference Tools

ETSI MEC (Multi-access Edge Computing)

YearIn/OutMeetingTitle
2024OutMEC043Media industry segment
2024OutMEC043MEC043 UC on Electronic news gathering