Network coding and satellites
draft-irtf-nwcrg-network-coding-satellites-01

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Internet Engineering Task Force                             N. Kuhn, Ed.
Internet-Draft                                                      CNES
Intended status: Informational                            E. Lochin, Ed.
Expires: May 14, 2019                                       ISAE-SUPAERO
                                                            Nov 10, 2018

                     Network coding and satellites
             draft-irtf-nwcrg-network-coding-satellites-01

Abstract

   This memo details a multi-gateway satellite system to identify
   multiple opportunities on how coding techniques could be deployed at
   a wider scale.

Status of This Memo

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

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   This Internet-Draft will expire on May 14, 2019.

Copyright Notice

   Copyright (c) 2018 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

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Kuhn & Lochin             Expires May 14, 2019                  [Page 1]
Internet-Draft        Network coding and satellites             Nov 2018

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Glossary  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.2.  Requirements Language . . . . . . . . . . . . . . . . . .   3
   2.  A note on satellite topology  . . . . . . . . . . . . . . . .   4
   3.  Status of reliability schemes in actually deployed satellite
       systems . . . . . . . . . . . . . . . . . . . . . . . . . . .   6
   4.  Details on the use cases  . . . . . . . . . . . . . . . . . .   6
     4.1.  Two way relay channel mode  . . . . . . . . . . . . . . .   7
     4.2.  Reliable multicast  . . . . . . . . . . . . . . . . . . .   7
     4.3.  Hybrid access . . . . . . . . . . . . . . . . . . . . . .   8
     4.4.  Dealing with varying capacity . . . . . . . . . . . . . .   9
     4.5.  Improving the gateway handovers . . . . . . . . . . . . .  10
     4.6.  Delay/Disruption Tolerant Networks  . . . . . . . . . . .  11
   5.  Research challenges . . . . . . . . . . . . . . . . . . . . .  12
     5.1.  Deployability in current SATCOM systems . . . . . . . . .  12
     5.2.  Interaction with virtualization . . . . . . . . . . . . .  12
   6.  Conclusion  . . . . . . . . . . . . . . . . . . . . . . . . .  13
   7.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  13
   8.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  13
   9.  Security Considerations . . . . . . . . . . . . . . . . . . .  13
   10. References  . . . . . . . . . . . . . . . . . . . . . . . . .  13
     10.1.  Normative References . . . . . . . . . . . . . . . . . .  13
     10.2.  Informative References . . . . . . . . . . . . . . . . .  14
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  17

1.  Introduction

   Guaranteeing both physical layer robustness and efficient usage of
   the radio resource has been in the core design of SATellite
   COMmunication (SATCOM) systems.  The trade-off often resided in how
   much redundancy a system adds to cope from link impairments, without
   reducing the good-put when the channel quality is high.  There is
   usually enough redundancy to guarantee a Quasi-Error Free
   transmission.  However, physical layer reliability mechanisms may not
   recover transmission losses (e.g. with a mobile user) and layer 2 (or
   above) re-transmissions induce 500 ms one-way delay with a
   geostationary satellite.  Further exploiting coding schemes at higher
   OSI-layers is an opportunity for releasing constraints on the
   physical layer in such cases and improving the performance of SATCOM
   systems.

   We have noticed an active research activity on coding and SATCOM in
   the past.  That being said, not much has actually made it to
   industrial developments.  In this context, this document aims at