Network coding and satellites
draft-irtf-nwcrg-network-coding-satellites-04
Internet Engineering Task Force N. Kuhn, Ed.
Internet-Draft CNES
Intended status: Informational E. Lochin, Ed.
Expires: July 7, 2019 ISAE-SUPAERO
Jan 3, 2019
Network coding and satellites
draft-irtf-nwcrg-network-coding-satellites-04
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
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This Internet-Draft will expire on July 7, 2019.
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Internet-Draft Network coding and satellites Jan 2019
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1. Glossary . . . . . . . . . . . . . . . . . . . . . . . . 3
2. A note on satellite topology . . . . . . . . . . . . . . . . 4
3. Actual deployment of reliability schemes in satellite systems 6
4. Details on the use cases . . . . . . . . . . . . . . . . . . 7
4.1. Two-way relay channel mode . . . . . . . . . . . . . . . 7
4.2. Reliable multicast . . . . . . . . . . . . . . . . . . . 8
4.3. Hybrid access . . . . . . . . . . . . . . . . . . . . . . 8
4.4. Dealing with varying capacity . . . . . . . . . . . . . . 9
4.5. Improving the gateway handovers . . . . . . . . . . . . . 10
5. Research challenges . . . . . . . . . . . . . . . . . . . . . 11
5.1. Towards an increased deployability in SATCOM systems . . 11
5.2. Interaction with virtualization . . . . . . . . . . . . . 11
5.3. Delay/Disruption Tolerant Networks . . . . . . . . . . . 12
6. Conclusion . . . . . . . . . . . . . . . . . . . . . . . . . 12
7. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 13
8. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 13
9. Security Considerations . . . . . . . . . . . . . . . . . . . 13
10. Informative References . . . . . . . . . . . . . . . . . . . 13
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 15
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
identifying opportunities for further usage of coding in these
systems.
This document follows the taxonomy of coding techniques for efficient
network communications [RFC8406].
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