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Efficient Information Dissemination in Wireless Sensor Networks using Mobile Sinks

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Conference paper

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Wireless sensor networks constitute an emerging technology that has received recently significant attention both from industry and academia. On the one hand, there is an ever-widening range of attractive applications e.g., disaster and environmental monitoring, wildlife habitat monitoring, target tracking, intrusion detection, security surveillance sensor networks can be used for. On the other hand, sensor networks are self-organizing ad-hoc systems where optimized energy consumption is of paramount importance therefore, relaying information between sensors and a sink node, possibly over multiple wireless hops, in an energy-efficient manner is a challenging task that preoccupies the research community for some time now. Optimizing energy consumption in wireless sensor networks is of paramount importance. Sensors are tiny devices with sensing, processing, and transmitting capabilities they are of low cost, but have a consequently low storage and computational capacity, and a limited energy supply. It is usually considered impossible or impractical from a technical or economical point of view to recharge their batteries thus, they should be managed in such a way to ensure the unattended operation of the network for a long enough time period e.g., several months. There is a recent trend to deal with this problem by introducing mobile elements sensors or sink nodes in the network. The majority of these approaches assume time-driven scenarios. However, there are several real-life applications for which an event-based is more appropriate. In this paper we propose to adaptively move the sink node inside the covered region, according to the evolution of current events, so as to minimize the energy consumption of the dissemination of the event-related data. Both analytical and simulation results are given.

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  • Radio Communications

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