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Sensor activation and radius adaptation (SARA) in heterogeneous sensor networks

Sensor activation and radius adaptation (SARA) in heterogeneous sensor networks Sensor Activation and Radius Adaptation (SARA) in Heterogeneous Sensor Networks NOVELLA BARTOLINI and TIZIANA CALAMONERI, Sapienza University of Rome TOM LA PORTA, Pennsylvania State University CHIARA PETRIOLI and SIMONE SILVESTRI, Sapienza University of Rome In order to prolong the lifetime of a wireless sensor network (WSN) devoted to monitoring an area of interest, a useful means is to exploit network redundancy, activating only the sensors that are strictly necessary for coverage and making them work with the minimum necessary sensing radius. In this article, we introduce the first algorithm that reduces sensor coverage redundancy through joint Sensor Activation and sensing Radius Adaptation (SARA) in general application scenarios comprising two classes of devices: sensors with variable sensing radius and sensors with fixed sensing radius. This device heterogeneity is explicitly addressed by modeling the coverage problem through Voronoi-Laguerre diagrams that, differently from Voronoi diagrams, allow for correctly identifying each sensor coverage region depending on the sensor current radius and the radii of its neighboring nodes. SARA executes quickly with guaranteed termination and, given the currently available nodes, it always guarantees maximum coverage. By means of extensive simulations, we show that SARA obtains remarkable improvements with respect to previous solutions, ensuring, http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png ACM Transactions on Sensor Networks (TOSN) Association for Computing Machinery

Sensor activation and radius adaptation (SARA) in heterogeneous sensor networks

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Publisher
Association for Computing Machinery
Copyright
Copyright © 2012 by ACM Inc.
ISSN
1550-4859
DOI
10.1145/2240092.2240098
Publisher site
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Abstract

Sensor Activation and Radius Adaptation (SARA) in Heterogeneous Sensor Networks NOVELLA BARTOLINI and TIZIANA CALAMONERI, Sapienza University of Rome TOM LA PORTA, Pennsylvania State University CHIARA PETRIOLI and SIMONE SILVESTRI, Sapienza University of Rome In order to prolong the lifetime of a wireless sensor network (WSN) devoted to monitoring an area of interest, a useful means is to exploit network redundancy, activating only the sensors that are strictly necessary for coverage and making them work with the minimum necessary sensing radius. In this article, we introduce the first algorithm that reduces sensor coverage redundancy through joint Sensor Activation and sensing Radius Adaptation (SARA) in general application scenarios comprising two classes of devices: sensors with variable sensing radius and sensors with fixed sensing radius. This device heterogeneity is explicitly addressed by modeling the coverage problem through Voronoi-Laguerre diagrams that, differently from Voronoi diagrams, allow for correctly identifying each sensor coverage region depending on the sensor current radius and the radii of its neighboring nodes. SARA executes quickly with guaranteed termination and, given the currently available nodes, it always guarantees maximum coverage. By means of extensive simulations, we show that SARA obtains remarkable improvements with respect to previous solutions, ensuring,

Journal

ACM Transactions on Sensor Networks (TOSN) – Association for Computing Machinery

Published: Jul 1, 2012

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