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Defining tolerance : impacts of delay and disruption when managing challenged networks

Show simple item record Birrane, Edward J. III Burleigh, Scott C. Cerf, Vint 2012-04-17T16:55:26Z 2012-04-17T16:55:26Z 2011-03-31
dc.identifier.citation AIAA Infotech@Aerospace, St. Louis, Missouri. March 29-31, 2011 en_US
dc.identifier.clearanceno 11-1063
dc.description.abstract Challenged networks exhibit irregularities in their communication performance stemming from node mobility, power constraints, and impacts from the operating environment. These irregularities manifest as high signal propagation delay and frequent link disruption. Understanding those limits of link disruption and propagation delay beyond which core networking features fail is an ongoing area of research. Various wireless networking communities propose tools and techniques that address these phenomena. Emerging standardization activities within the Internet Research Task Force (IRTF) and the Consultative Committee for Space Data Systems (CCSDS) look to build upon both this experience and scalability analysis. Successful research in this area is predicated upon identifying enablers for common communication functions (notably node discovery, duplex communication, state caching, and link negotiation) and how increased disruptions and delays affect their feasibility within the network. Networks that make fewer assumptions relating to these enablers provide more universal service. Specifically, reliance on node discovery and link negotiation results in network-specific operational concepts rather than scalable technical solutions. Fundamental to this debate are the definitions, assumptions, operational concepts, and anticipated scaling of these networks. This paper presents the commonalities and differences between delay and disruption tolerance, including support protocols and critical enablers. We present where and how these tolerances differ. We propose a set of use cases that must be accommodated by any standardized delay-tolerant network and discuss the implication of these on existing tool development. en_US
dc.description.sponsorship NASA/JPL en_US
dc.language.iso en_US en_US
dc.publisher Pasadena, CA : Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2011. en_US
dc.subject Disruption-Tolerant Networks (DTN) en_US
dc.subject delay en_US
dc.subject communication functions en_US
dc.subject low power processors en_US
dc.subject energy harvesters en_US
dc.subject mobility drivers en_US
dc.title Defining tolerance : impacts of delay and disruption when managing challenged networks en_US
dc.type Preprint en_US
dc.subject.NASATaxonomy Computer Programming and Software en_US

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