Paper Info
Title
Sensor activation and radius adaptation (SARA) in heterogeneous sensor networks
Abstract
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, in networks with heterogeneous nodes, longer network lifetime and wider coverage.
Year
DOI
Venue
2010
10.1145/2240092.2240098
ACM Transactions on Sensor Networks (TOSN)
Keywords
DocType
Volume
sensor current radius,radius adaptation,sensor coverage redundancy,coverage problem,sensor coverage region,sensor activation,heterogeneous sensor network,wider coverage,network redundancy,wireless sensor network,maximum coverage,longer network lifetime,wireless sensor networks
Journal
8
Issue
ISSN
Citations 
3
1550-4859
10
PageRank 
References 
Authors
0.56
22
5
Name
Order
Citations
PageRank
Novella Bartolini125021.87
Tiziana Calamoneri251146.80
thomas la porta3100.56
C. Petrioli41713157.55
S. Silvestri527529.61