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Rhythm and randomness in human contact

By Mervyn P. Freeman, Nicholas W. Watkins, Eiko Yoneki and Jon Crowcroft

Abstract

There is substantial interest in the effect of human mobility patterns on opportunistic communications. Inspired by recent work revisiting some of the early evidence for a L\'evy flight foraging strategy in animals, we analyse datasets on human contact from real world traces. By analysing the distribution of inter-contact times on different time scales and using different graphical forms, we find not only the highly skewed distributions of waiting times highlighted in previous studies but also clear circadian rhythm. The relative visibility of these two components depends strongly on which graphical form is adopted and the range of time scales. We use a simple model to reconstruct the observed behaviour and discuss the implications of this for forwarding efficiency

Topics: Data and Information, Electronics, Engineering and Technology
Year: 2010
DOI identifier: 10.1109/ASONAM.2010.57
OAI identifier: oai:nora.nerc.ac.uk:11781
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