Multipath Communication with Satellite and Terrestrial Links
draft-deutschmann-sat-ter-multipath-00

Document Type Active Internet-Draft (individual)
Authors Jörg Deutschmann  , Kai-Steffen Hielscher  , Reinhard German 
Last updated 2020-10-19
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Internet Engineering Task Force                           J. Deutschmann
Internet-Draft                                            K-S. Hielscher
Intended status: Informational                                 R. German
Expires: April 22, 2021                      Univ. of Erlangen-Nuernberg
                                                        October 19, 2020

      Multipath Communication with Satellite and Terrestrial Links
                 draft-deutschmann-sat-ter-multipath-00

Abstract

   Multipath communication enables the combination of low data rate, low
   latency terrestrial links and high data rate, high latency links
   (e.g., geostationary satellite links) to provide a full-fledged
   Internet access.  However, the combination of such heterogeneous
   links is challenging from a technical point of view.  This document
   describes a possible solution, i.e. an architecture and scheduling
   mechanism.  The applicability of this approach to encrypted transport
   protocols (e.g., Multipath QUIC) is also discussed.

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Architecture  . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  Comparison of Link Characteristics  . . . . . . . . . . . . .   4
   4.  Backlog-Based Scheduling  . . . . . . . . . . . . . . . . . .   4
   5.  Applicability to Non-TCP / Enrypted Traffic . . . . . . . . .   5
   6.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   5
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   5
   8.  Security Considerations . . . . . . . . . . . . . . . . . . .   5
   9.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   5
     9.1.  Normative References  . . . . . . . . . . . . . . . . . .   5
     9.2.  Informative References  . . . . . . . . . . . . . . . . .   5
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   6

1.  Introduction

   Some areas (e.g., rural areas) suffer from poor Internet connectivity
   (e.g., low data rate DSL lines or old generation cellular networks).
   On the other hand, geostationary satellite Internet access is
   available all over the world with data rates of up to 50 Mbit/s and
   more.  Obviously, the combination of both Internet access types seems
   beneficial.

             high data rate, ______
             high latency          \
                                    +-----> high data rate,
             low data rate, _______/        low latency
             low latency

    Motivation for combining very heterogeneous Internet access links.

                                 Figure 1

   However, the combination of very heterogeneous link types is
   challenging given currently deployed transport protocols.  Some
   applications could be strictly assigned to either the high data rate,
   high latency link (e.g., bulk data transfer) or the low data rate,
   low latency link (e.g., VoIP).  Other applications, especially
   Internet browsing, have more versatile requirements.  Connection
   setup and interactive content require low latency, but transferring
   large objects requires high data rate.  The combination of links as
   shown in Figure 1 cannot outperform a fast terrestrial Internet

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