Subject: New Liaison Statement, "LS on ATSSS Phase 2 Requirements to IETF QUIC Working Group"

From: Liaison Statement Management Tool <[email-masked]>
Date: Thu, 24 Sep 2020 07:59:32 -0700

Title: LS on ATSSS Phase 2 Requirements to IETF QUIC Working Group
Submission Date: 2020-09-24
URL of the IETF Web page: https://datatracker.ietf.org/liaison/1697/

From: Susanna Kooistra <[email-masked]>
To: Mark Nottingham <[email-masked]>,Lars Eggert <[email-masked]>,Lucas Pardue <[email-masked]>
Cc: QUIC Discussion List <[email-masked]>,Lucas Pardue <[email-masked]>,Magnus Westerlund <[email-masked]>,Martin Duke <[email-masked]>,Mark Nottingham <[email-masked]>,Lars Eggert <[email-masked]>,Gonzalo Camarillo <[email-masked]>,The IETF <[email-masked]>
Response Contacts: [email-masked]
Technical Contacts: 
Purpose: For information

Body: 1. Overall Description:
3GPP was encouraged by IETF QUIC Working Group in last liaison exchange on May 2020 to keep IETF informed of the requirements for QUIC/MP-QUIC related protocols and extensions.  Since then, 3GPP ATSSS Phase-2 study has made significant progress and identified some important dependency on the work in IETF. 

While 3GPP is working towards the conclusion of the study phase by 4Q2020, dependencies and requirements have been identified on the QUIC/MP-QUIC protocols and extensions development in IETF.  Hence, we would like to consult with IETF with the following questions: 

Qn-1: The target date on the conclusion of 3GPP ATSSS Ph2 study which includes also the consideration to leverage the multipath support for connection splitting capabilities is 4Q2020. 3GPP would like to consult with IETF on the feasibility to have working group drafts on MP-QUIC protocols and extensions on or before 1Q2021.  

Qn-2: When enabling QUIC/MP-QUIC between UE (User Equipment) and UPF (User Plane Function) in 3GPP 5G Core, would it be feasible to optionally disable encryption in QUIC/MP-QUIC, in order to avoid multiple encryption layers? 

2. Actions:
To IETF group:
ACTION: 3GPP SA2 kindly requests IETF to take the above information into account to provide us the feedback and to take our requirements into considerations for future development.

3. Date of Next TSG-SA2 Meetings:
3GPP TSG SA2#141E	12th – 23rd October 2020	eMeeting
3GPP TSG SA2#142E	16th – 20th  November 2020	eMeeting
Attachments:

    S2-2006331 was 5185 eATSSS LS to IETFr07
    https://www.ietf.org/lib/dt/documents/LIAISON/liaison-2020-09-24-3gpp-tsgsa-sa2-quic-ls-on-atsss-phase-2-requirements-to-ietf-quic-working-group-attachment-1.docx