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Duty cycling in opportunistic networks: the effect on intercontact times

In opportunistic networks, putting devices in energy saving mode is crucial to preserve their battery, and hence to increase the lifetime of the network and to foster user cooperation. However, a side effect of duty cycling is to reduce the number of usable contacts for delivering messages, thus increasing intercontact times and delays. In order to understand the effect of duty cycling in opportunistic networks, in this paper we propose a general model for deriving the pairwise intercontact times when a duty cycling policy is superimposed on the original encounter process determined only by node mobility. Then, we specialise this model when the original intercontact times are exponential (an assumption popular in the literature), and we show that, in this case, the intercontact times measured after duty cycling are, approximately, again exponential, but with a rate proportional to the inverse of the duty cycle.

17th ACM international conference on Modeling, analysis and simulation of wireless and mobile systems (MSWiM 2014), New York, USA, 2014

IIT authors:

Type: Article in proceedings of international peer-reviewed conference
Field of reference: Information Technology and Communication Systems
Da pagina 197 a pagina 201

Activity: Future Internet