[Fwd: New Liaison Statement, "LS on need for Multi-Path QUIC for ATSSS"]

[Magnus Westerlund <[e-mail]>]

QUIC WG,

The IETF has received the attached Liasion statement (
https://datatracker.ietf.org/liaison/1678/) that is intended for the QUIC WG.
Please review it and the WG should considerd sending information to 3GPP as
requested at key points in the process of the multi-path extension/version of
QUIC. 
 
Cheers

Magnus Westerlund 
TSV AD

--- Begin Message ---

Title: LS on need for Multi-Path QUIC for ATSSS
Submission Date: 2020-04-01
URL of the IETF Web page: https://datatracker.ietf.org/liaison/1678/

From: Susanna Kooistra <[e-mail]>
To: The IETF Chair <[e-mail]>
Cc: The IESG <[e-mail]>,The IETF Chair <[e-mail]>,Gonzalo Camarillo <[e-mail]>
Response Contacts: [e-mail]
Technical Contacts: 
Purpose: For information

Body: 1. Overall Description:
3GPP has approved the study item on “Study on Access Traffic Steering, Switch and Splitting support in the 5G system architecture Phase 2” as part of Release 17.

This study aims to investigate the extension of Rel-16 ATSSS feature enabling the support of steering, switching and splitting the traffic of a PDU session supported over multiple accesses (namely 3GPP and Non-3GPP access), including the following objective:

-	Whether and how to support additional steering methods(s). Proposed solutions shall be based on IETF protocols or extension of such protocols (i.e. QUIC/MP-QUIC).

Please see attached document for details on study item objectives and timelines. 

The work on the study has not yet started in 3GPP, and there are thus no agreed conclusions. . The goal is to enable steering, switching and splitting of traffic (primarily UDP) across multiple accesses, including latency sensitive and real time traffic. Therefore 3GPP is interested to receive regular feedback on progress and prioritization on the multipath extensions to QUIC.


2. Actions:
To IETF group:
ACTION: 	3GPP SA kindly requests IETF to take the above information into account when discussing future work in prioritizing the multipath work for QUIC.


3. Date of Next TSG-SA Meetings:
3GPP TSG SA#88	17th – 19th June 2020	Malmö, SWEDEN
3GPP TSG SA#89	16th – 18th September 2020	Funchal (Madeira), Portugal
Attachments:

    SP-200095_S2-2002593_SP-190558_Revised_SID_FS_ATSSS_Ph2_rm
    https://www.ietf.org/lib/dt/documents/LIAISON/liaison-2020-04-01-3gpp-ietf-ls-on-need-for-multi-path-quic-for-atsss-attachment-1.doc

    SP-200095_S2-2002593_SP-190558_Revised_SID_FS_ATSSS_Ph2_cl
    https://www.ietf.org/lib/dt/documents/LIAISON/liaison-2020-04-01-3gpp-ietf-ls-on-need-for-multi-path-quic-for-atsss-attachment-2.doc

    SP-200289_SP-200264_cleaned
    https://www.ietf.org/lib/dt/documents/LIAISON/liaison-2020-04-01-3gpp-ietf-ls-on-need-for-multi-path-quic-for-atsss-attachment-3.docx

--- End Message ---