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Delay- and disruption-tolerant networking (DTN) grew out of attempts to develop an interplanetary Internet but has evolved into an active area of networking research, with applications in space networking, military tactical networking, and networking for various challenged communities. The DTN Research Group provides an open forum in which DTN researchers and developers can collaborate to further...
The Licklider transmission protocol (LTP) is a delay-tolerant point-to-point protocol being developed by the Delay-Tolerant Networking Research Group (DTNRG). LTP-Transport is an extension to LTP that provides end-to-end services and which is designed to be a generic Delay-Tolerant Network (DTN) friendly transport protocol. We describe our network emulation based test setup for these protocols and...
Challenging networks require transmission protocols able to deal with the specificities of the environment. These adverse conditions include very long delays (delays in hours are normal), episodic connectivity, asymmetric data rates, higher bit error rate (The raw BERs are in the order of 10-2), very high free space losses (around 250-300 dB) and power constraints that may severely compromise the...
The authors give an overview of current work on delay- and disruption-tolerant networking and review the overall architecture proposed by the Internet Research Task Force's Delay Tolerant Networking Research Group. Their approach to networking makes no assumption that nodes will have end-to-end connectivity, which could be missing with extremely high-latency connections, if the nodes are only in contact...
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