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Internet-Drafts are working documents of the Internet Engineering Task Force (IETF), its areas, and its working groups. Note that other groups may also distribute working documents as Internet-Drafts. Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is(More)
—Interplanetary Overlay Network (ION) is an implementation of the DTN Bundle Protocol that is intended to be usable for interplanetary communications. The space-flight-specific constraints on this implementation are discussed, as are the architecture of ION-based DTN nodes and the results of some initial performance benchmarking.
A strategy is being developed whereby the current set of internationally standardized space data communications protocols can be incrementally evolved so that a first version of an operational "Interplanetary Internet" is feasible by the end of the decade. This paper describes its architectural concepts, discusses the current set of standard space data(More)
Dagstuhl Leibniz Center for Informatics. During the seminar, several participants presented their current research, and ongoing work and open problems were discussed. Abstracts of the presentations given during the seminar as well as abstracts of seminar results and ideas are put together in this paper. The rst section describes the seminar topics and goals(More)
Delay and disruption tolerant networks (DTNs) may experience frequent and long-lived connectivity disruptions. Unlike traditional networks, such as the TCP/IP-based Internet, DTNs are often subject to high latency caused by very long propagation delays (e.g., interplanetary communication) and/or intermittent connectivity. Another feature that sets DTNs(More)
Controlling congestion is critical to ensure adequate network operation and performance. That is especially the case in networks operating in "challenged"- or "extreme" environments where episodic connectivity is part of the network's normal operation. Our goal is to study congestion control mechanisms that have been proposed for these so-called disruption(More)
Historically, a fundamental obstacle to providing universal network access has been the difficulty of extending network infrastructure to under-served users at affordable cost. The desperately poor are not the only ones affected:  Relatively affluent users may be in locations that are too geographically remote (and too sparsely populated) to justify the(More)
Unlike TCP/IP networks, in DTNs end-to-end paths between nodes cannot be guaranteed at all times. This means that DTN nodes may have to store messages for long periods of time before they can forward the messages towards their ultimate destinations. As a result, congestion control in DTNs is critical to achieve adequate performance, yet needs to be(More)
A Delay-Tolerant Network (DTN) is a necessity for communication nodes that may need to wait for long periods to form networks. The IETF Delay Tolerant Network Research Group is developing protocols to enable such networks for a broad variety of Earth and interplanetary applications. The Arctic would benefit from a predictive velocity-enabled version of DTN(More)