Coding techniques for satellite systems
draft-irtf-nwcrg-network-coding-satellites-05
Internet Engineering Task Force N. Kuhn, Ed.
Internet-Draft CNES
Intended status: Informational E. Lochin, Ed.
Expires: December 6, 2019 ISAE-SUPAERO
June 4, 2019
Coding techniques for satellite systems
draft-irtf-nwcrg-network-coding-satellites-05
Abstract
This document is the product of the Coding for Efficient Network
Communications Research Group (NWCRG). This document follows the
taxonomy document [RFC8406] and considers coding as a linear
combination of packets that operate above the network layer. In this
context, this memo details a multi-gateway satellite system to
identify use-cases where coding is relevant. As example, coding
operating above the network layer can be exploited to cope from
residual losses or provide reliable multicast services. The
objective is to contribute to a larger deployment of such techniques
in SATCOM systems. This memo also identifies open research issues
related to the deployment of coding in SATCOM systems, such as the
interaction between congestion controls and coding techniques.
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 December 6, 2019.
Copyright Notice
Copyright (c) 2019 IETF Trust and the persons identified as the
document authors. All rights reserved.
Kuhn & Lochin Expires December 6, 2019 [Page 1]
Internet-Draft Coding techniques for satellite systems June 2019
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. A note on satellite topology . . . . . . . . . . . . . . . . 5
3. Use-cases for improving the SATCOM system performance with
coding techniques . . . . . . . . . . . . . . . . . . . . . . 7
3.1. Two-way relay channel mode . . . . . . . . . . . . . . . 7
3.2. Reliable multicast . . . . . . . . . . . . . . . . . . . 8
3.3. Hybrid access . . . . . . . . . . . . . . . . . . . . . . 9
3.4. Dealing with LAN losses . . . . . . . . . . . . . . . . . 9
3.5. Dealing with varying channel conditions . . . . . . . . . 10
3.6. Improving the gateway handovers . . . . . . . . . . . . . 11
4. Research challenges . . . . . . . . . . . . . . . . . . . . . 11
4.1. On the joint-use of coding techniques and congestion
control in SATCOM systems . . . . . . . . . . . . . . . . 12
4.2. On the efficient usage of satellite ressource . . . . . . 12
4.3. Interaction with virtualized satellite gateways and
terminals . . . . . . . . . . . . . . . . . . . . . . . . 12
4.4. Delay/Disruption Tolerant Networks . . . . . . . . . . . 12
5. Conclusion . . . . . . . . . . . . . . . . . . . . . . . . . 13
6. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 13
7. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 13
8. Security Considerations . . . . . . . . . . . . . . . . . . . 13
9. Informative References . . . . . . . . . . . . . . . . . . . 14
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 goodput when the channel quality is good. There is
usually enough redundancy to guarantee a Quasi-Error Free
transmission. The recovery time depends on the encoding block size.
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