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Under DTN2

by Agoston Petz, Brenton Walker, Christine Julien, Calvin Ardi
"... The Bundle Protocol shows great promise as a general purpose application-layer protocol for delay-tolerant networks (DTNs) and has found many adopters within the research community. As an application layer protocol, a convergence layer (UDP/TCP sockets or some other domain-specific transport mechani ..."
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Modular Router as a new highly configurable and extensible convergence layer, provide an implementation for a Click convergence layer adapter in the popular DTN2 Bundle Protocol reference implementation, and present a performance comparison between the Click convergence layer and native DTN2 convergence

An N4C DTN Router Node Design

by Stephen Farrell, Stefan Weber, Alex Mcmahon, Eoin Meehan, Kerry Hartnett
"... We describe the design for a Delay Tolerant Network (DTN) node to be used in the N4C project's summer 2009 trials to be held in conjunction with the ExtremeCom workshop. The design uses COTS products and applications; the DTN2 implementation of the Bundle Protocol (BP) and provides basic networ ..."
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We describe the design for a Delay Tolerant Network (DTN) node to be used in the N4C project's summer 2009 trials to be held in conjunction with the ExtremeCom workshop. The design uses COTS products and applications; the DTN2 implementation of the Bundle Protocol (BP) and provides basic

IBR-DTN: an efficient implementation for embedded systems

by Michael Doering, Sven Lahde, Johannes Morgenroth, Lars Wolf - in Proceedings of the third ACM workshop on Challenged networks (CHANTS ’08
"... In our demonstration we present an implementation of DTN for embedded systems and demonstrate how a WLAN ac-cess point can be turned into a stand-alone DTN-node for mobile applications. The modular software design of “IBR-DTN ” is centered on the efficient use of resources and inter-operability with ..."
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-operability with the DTN2 reference implementation. Our modules comprise a DTN Core, Bundle Router, Persistent Storage and a Convergence Layer Manager. IBR-DTN is work in progress, but the comparison of the features and performance to DTN2 is already very promising. Finally, we present a practical evaluation in a mobile

Design, Experimentation, Measurement

by Brenton D. Walker, Ian D. Vo, Matthew Beecher, Matthew Seligman
"... MeshTest is a laboratory-based multi-hop wireless testbed that can subject real wireless nodes running real DTN imple-mentations to reproducible mobile scenarios. It uses shielded enclosures and an RF matrix switch to dynamically control the attenuation experienced between pairs of nodes. The testbe ..."
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. The testbed is an ideal platform for DTN testing, oering con-venient experimental control and data management. We have installed the DTN2 Reference Implementation on the testbed nodes, and and have been using it to run exper-iments. Our current experimental scenarios are similar to the well known Data MULE

A DTN Stack for Cognitive Radio Networks

by Jawad Seddar, Vania Conan
"... Abstract — In this paper, we evaluate over a software de-fined radio testbed the performance of a DTN implementa-tion in cognitive radio networks. Our experimental platform uses USRP devices operated by the GNU radio platform for physical and MAC layers operations. Over the deployed soft-ware archie ..."
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-ware archietcture, we have compared 2 existing DTN imple-mentations then run a set of expirements in order to chatac-terize the reaction of the DTN bundle protocol to dynamically frequency changing environment. Our experiments show that DTN can offer lower delivery delays in cognitive radio net

Supporting Predicate Routing in DTN over MANET ∗

by Gabriele Ferrari, Aggradi Flavio, Esposito Ibrahim Matta
"... We consider a Delay Tolerant Network (DTN) whose users (nodes) are connected by an underlying Mobile Ad hoc Network (MANET) substrate. Users can declaratively express high-level policy constraints on how “content ” should be routed. For example, content may be diverted through an intermediary DTN no ..."
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Linux [2] to emulate every node running a DTN Reference Implementation code [5]. In our initial prototype, we use the On Demand Distance Vector (AODV) MANET routing protocol. We use the network simulator ns-2 (ns-emulation version) to simulate the mobility and wireless connectivity of both DTN and MANET

Exact Radiation Conditions on Spheroidal Boundaries with Sparse Iterative Methods for Efficient Computation of Exterior Acoustics

by Lonny L. Thompson, Cristian Ianculescu, Runnong Huan
"... Exact Dirichlet-to-Neumann (DtN) maps are derived on spheroidal boundaries for finite element implementation. The use of spheroidal boundaries enables the efficient solution of scattering from elongated objects. Comparisons of sparse preconditioned iterative solvers, including BiCG-Stab and QMR with ..."
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Exact Dirichlet-to-Neumann (DtN) maps are derived on spheroidal boundaries for finite element implementation. The use of spheroidal boundaries enables the efficient solution of scattering from elongated objects. Comparisons of sparse preconditioned iterative solvers, including BiCG-Stab and QMR

PreDA: Predicate Routing for DTN Architectures over MANET

by Flavio Esposito, Ibrahim Matta , 2009
"... Abstract—We consider a Delay Tolerant Network (DTN) whose users (nodes) are connected by an underlying Mobile Ad hoc Network (MANET) substrate. Users can declaratively express high-level policy constraints on how “content ” should be routed. For example, content can be directed through an intermedia ..."
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within the MANET nodes. Our testbed [2] uses a Linux system architecture with User Mode Linux [3] to emulate every DTN node with a DTN Reference Implementation code [4]. In our initial architecture prototype, we use the On Demand Distance Vector (AODV) routing protocol at the MANET level. We use

PreDA: Predicate Routing for DTN Architectures over MANET

by Esposito Flavio, Flavio Esposito, Ibrahim Matta , 2009
"... Abstract—We consider a Delay Tolerant Network (DTN) whose users (nodes) are connected by an underlying Mobile Ad hoc Network (MANET) substrate. Users can declaratively express high-level policy constraints on how “content ” should be routed. For example, content can be directed through an intermedia ..."
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within the MANET nodes. Our testbed [2] uses a Linux system architecture with User Mode Linux [3] to emulate every DTN node with a DTN Reference Implementation code [4]. In our initial architecture prototype, we use the On Demand Distance Vector (AODV) routing protocol at the MANET level. We use

Delay-Tolerant Network Experiments on the MeshTest Wireless Testbed

by Matthew Seligman, Brenton Walker, T. Charles Clancy
"... Abstract — Delay Tolerant Networks (DTNs) are a class of networks in which a contemporaneous end-to-end path from source to destination generally does not exist. Such networks often use on a store-carry-forward communication model which relies on the mobility of nodes to transfer data between geogra ..."
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installed the DTN2 Reference Implementation on the testbed nodes, and in this paper we report on a series of experiments based on the well known Data MULE model. Specifically, we investigate the effects of buffer limitations on the data MULEs and sensors node, velocity of the data MULEs, and bundle
Results 1 - 10 of 28