QUIC for SATCOM
draft-kuhn-quic-4-sat-02

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Internet Engineering Task Force                                  N. Kuhn
Internet-Draft                                                      CNES
Intended status: Informational                              G. Fairhurst
Expires: May 6, 2020                              University of Aberdeen
                                                               J. Border
                                             Hughes Network Systems, LLC
                                                              E. Stephan
                                                                  Orange
                                                        November 3, 2019

                            QUIC for SATCOM
                        draft-kuhn-quic-4-sat-02

Abstract

   QUIC has been designed for use across Internet paths.  Initial
   designs of QUIC have focussed on common deployment scenarios for web
   traffic and have not focussed on the performance when using a path
   with a large Bandwidth-Delay Product (BDP).  A path can combine
   satellites network segment together with a wide variety of other
   network technologies (Ethernet, cable modems, WiFi, cellular, radio
   links, etc): this complicates the characteristics of the end-to-end
   path.  One example of such a scenario occurs when a satellite
   communication (SATCOM) system is used to provide all or a part of the
   end-to-end path.  If this is not addressed, the end-to-end quality of
   experience can be degraded.

   This memo identifies the characteristics of a SATCOM link that impact
   the operation of the QUIC transport protocol and proposes current
   practice to ensure acceptable protocol performance.

Status of This Memo

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

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF).  Note that other groups may also distribute
   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at https://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on May 6, 2020.

Kuhn, et al.               Expires May 6, 2020                  [Page 1]
Internet-Draft                 QUIC 4 SAT                  November 2019

Copyright Notice

   Copyright (c) 2019 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (https://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
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   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Operating over a path with a large BDP  . . . . . . . . . . .   3
   3.  TCP Split Solution  . . . . . . . . . . . . . . . . . . . . .   5
   4.  Mechanisms that improve the performance of QUIC for SATCOM  .   5
     4.1.  Getting up to speed . . . . . . . . . . . . . . . . . . .   5
     4.2.  Maximum window  . . . . . . . . . . . . . . . . . . . . .   6
     4.3.  Reliability . . . . . . . . . . . . . . . . . . . . . . .   6
     4.4.  ACK ratio . . . . . . . . . . . . . . . . . . . . . . . .   6
   5.  Discussion  . . . . . . . . . . . . . . . . . . . . . . . . .   7
   6.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   7
   7.  Contributors  . . . . . . . . . . . . . . . . . . . . . . . .   7
   8.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   8
   9.  Security Considerations . . . . . . . . . . . . . . . . . . .   8
   10. References  . . . . . . . . . . . . . . . . . . . . . . . . .   8
     10.1.  Normative References . . . . . . . . . . . . . . . . . .   8
     10.2.  Informative References . . . . . . . . . . . . . . . . .   8
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  10

1.  Introduction

   The end-to-end performance of an application using an Internet path
   can be impacted by the Bandwidth-Delay Product (BDP) of the links and
   network devices forming the path.  For instance, the page load time
   for a complex page can be much larger when the path includes a
   satellite link.  A significant contribution to this reduced
   performance arises from the initialisation and design of transport
   mechanisms.  QUIC's default congestion control is based on TCP