3GPP Access Traffic Steering Switching and Splitting (ATSSS) - Overview for IETF Participants
draft-bonaventure-quic-atsss-overview-00

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Last updated 2020-05-30
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QUIC Working Group                                     M. Boucadair, Ed.
Internet-Draft                                                    Orange
Intended status: Informational                       O. Bonaventure, Ed.
Expires: December 1, 2020                                 M. Piraux, Ed.
                                                           Q. De Coninck
                                                               UCLouvain
                                                         S. Dawkins, Ed.
                                                         Tencent America
                                                      M. Kuehlewind, Ed.
                                                                Ericsson
                                                                M. Amend
                                                        Deutsche Telekom
                                                              A. Kassler
                                                     Karlstad University
                                                                   Q. An
                                                           Alibaba Group
                                                           N. Keukeleire
                                                                Tessares
                                                                  S. Seo
                                                           Korea Telecom
                                                            May 30, 2020

3GPP Access Traffic Steering Switching and Splitting (ATSSS) - Overview
                         for IETF Participants
                draft-bonaventure-quic-atsss-overview-00

Abstract

   This document briefly presents the Access Traffic Steering,
   Switching, and Splitting (ATSSS) service being specified within the
   3rd Generation Partnership Project (3GPP).  The ATSSS service
   provides network support for multihomed devices to select a path for
   transmission (steer), move traffic from one path to another (switch),
   or use multiple paths simultaneously (split).  TS 23.501 specifies an
   ATSSS architecture for TCP traffic.

   This document presents a snap-shot of the ongoing discussion in the
   3GPP to enable ATSSS for non-TCP traffic, based on the use of QUIC,
   and assesses to what extent IETF specifications can be used to meet
   the ATSSS design goals.  Apparent gaps are also documented.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

Boucadair, et al.       Expires December 1, 2020                [Page 1]
Internet-Draft                 QUIC ATSSS                       May 2020

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  Notes for Readers . . . . . . . . . . . . . . . . . . . .   4
   2.  Introduction to Access Traffic Steering, Switching, and
       Splitting (ATSSS) . . . . . . . . . . . . . . . . . . . . . .   4
   3.  Contribution and Discussion Venues for this draft.  . . . . .   5
   4.  Conventions, Terminology, and Definitions . . . . . . . . . .   6
   5.  High Level ATSSS Overview . . . . . . . . . . . . . . . . . .   7
     5.1.  Reference Architecture  . . . . . . . . . . . . . . . . .   7
     5.2.  External IP Addresses Used by the ATSSS UPF . . . . . . .   8
     5.3.  ATSSS Modes . . . . . . . . . . . . . . . . . . . . . . .   9
     5.4.  ATSSS Rules . . . . . . . . . . . . . . . . . . . . . . .   9
   6.  ATSSS Phases  . . . . . . . . . . . . . . . . . . . . . . . .  11
   7.  ATSSS Phase 1: Support for TCP  . . . . . . . . . . . . . . .  11
     7.1.  ATSSS Phase 2: Adding Non-TCP Support . . . . . . . . . .  13
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