Network coding and satellites
draft-irtf-nwcrg-network-coding-satellites-00

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Internet Engineering Task Force                             N. Kuhn, Ed.
Internet-Draft                                                      CNES
Intended status: Informational                            E. Lochin, Ed.
Expires: April 8, 2019                                      ISAE-SUPAERO
                                                             Oct 5, 2018

                     Network coding and satellites
             draft-irtf-nwcrg-network-coding-satellites-00

Abstract

   This memo presents the current deployment of network coding in some
   satellite telecommunications systems along with a discussion on the
   multiple opportunities to introduce these techniques at a wider
   scale.

Status of This Memo

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   This Internet-Draft will expire on April 8, 2019.

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   Copyright (c) 2018 IETF Trust and the persons identified as the
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Kuhn & Lochin             Expires April 8, 2019                 [Page 1]
Internet-Draft        Network coding and satellites             Oct 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 network coding 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  . . . . . . . . . . .  10
   5.  Research challenges . . . . . . . . . . . . . . . . . . . . .  11
     5.1.  Deployability in current SATCOM systems . . . . . . . . .  11
     5.2.  Interaction with NFV  . . . . . . . . . . . . . . . . . .  12
   6.  Conclusion  . . . . . . . . . . . . . . . . . . . . . . . . .  12
   7.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  12
   8.  Contributors  . . . . . . . . . . . . . . . . . . . . . . . .  12
   9.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  13
   10. Security Considerations . . . . . . . . . . . . . . . . . . .  13
   11. References  . . . . . . . . . . . . . . . . . . . . . . . . .  13
     11.1.  Normative References . . . . . . . . . . . . . . . . . .  13
     11.2.  Informative References . . . . . . . . . . . . . . . . .  13
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  16

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 had to add to cope from link impairments,
   without reducing the good-put when the channel quality is high.
   Generally speaking, enough redundancy is added so as to guarantee a
   Quasi-Error Free transmission; however, there are cases where the
   physical layer could hardly recover the transmission losses (e.g.
   with a mobile user) and layer 2 (or above) re-transmissions induce an
   at least 500 ms delay with a geostationary satellite.  Further
   exploiting network coding schemes at higher OSI-layers is an
   opportunity for releasing constraints on the physical layer and
   improving the performance of SATCOM systems when the physical layer