Experiments on the spatial distribution of network code diversity in segmented DTNs

Authors:
Brenton Walker;Calvin Ardi;Agoston Petz;Jung Ryu;Christine Julien
Affiliations:
Laboratory for Telecommunications Sciences, College Park, MD, USA;Laboratory for Telecommunications Sciences, College Park, MD, USA;University of Texas - Austin, Austin, TX, USA;University of Texas - Austin, Austin, TX, USA;University of Texas - Austin, Austin, TX, USA
Venue:
CHANTS '11 Proceedings of the 6th ACM workshop on Challenged networks
Year:
2011

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Abstract

Biologists have observed that when a small colony breaks off from a larger population, the colony tends to have less genetic diversity. This phenomenon, called the "founder effect", has an analogy in delay-tolerant networks that employ network coded routing to disseminate large bundles of data. In this paper, we study the spread of information diversity through various experiments using a network coding DTN router. The scenarios we investigate include single communities with "mixing nodes", segmented communities with occasional travelers between sub-groups, and real encounter traces. Our experiments are carried out on the VirtualMeshTest testbed, which allows us to perform large trials with real implementations communicating using commodity wireless cards over emulated RF channels.