QUIC for SATCOM
draft-kuhn-quic-4-sat-00

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Last updated 2019-07-03
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Internet Engineering Task Force                                  N. Kuhn
Internet-Draft                                                      CNES
Intended status: Informational                              G. Fairhurst
Expires: January 4, 2020                          University of Aberdeen
                                                               J. Border
                                             Hughes Network Systems, LLC
                                                              E. Stephan
                                                                  Orange
                                                            July 3, 2019

                            QUIC for SATCOM
                        draft-kuhn-quic-4-sat-00

Abstract

   QUIC's congestion control is not designed for operating over an
   Internet path with a high BDP.  This limits the user experience.
   Moreover, 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.  If this is not addressed,
   the end-to-end quality of experience will be degraded.

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

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
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   This Internet-Draft will expire on January 4, 2020.

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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
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   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  . . . . . . . . . . . . . . . . . . . . .   4
   4.  Mechanisms that improve the performance of QUIC for SATCOM  .   4
     4.1.  Getting up to speed . . . . . . . . . . . . . . . . . . .   4
     4.2.  Reliability . . . . . . . . . . . . . . . . . . . . . . .   5
     4.3.  Maximum window  . . . . . . . . . . . . . . . . . . . . .   5
     4.4.  ACK ratio . . . . . . . . . . . . . . . . . . . . . . . .   5
   5.  Discussion  . . . . . . . . . . . . . . . . . . . . . . . . .   6
   6.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   6
   7.  Contributors  . . . . . . . . . . . . . . . . . . . . . . . .   6
   8.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   6
   9.  Security Considerations . . . . . . . . . . . . . . . . . . .   6
   10. References  . . . . . . . . . . . . . . . . . . . . . . . . .   6
     10.1.  Normative References . . . . . . . . . . . . . . . . . .   6
     10.2.  Informative References . . . . . . . . . . . . . . . . .   6
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   8

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 congestion control is based on TCP NewReno
   [I-D.ietf-quic-recovery] and the recommended initial window is
   defined by [RFC6928].

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