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