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- Title
Distributed lifetime coverage optimization protocol in wireless sensor networks.
- Authors
Idrees, Ali; Deschinkel, Karine; Salomon, Michel; Couturier, Raphaël
- Abstract
One of the main research challenges faced in Wireless Sensor Networks (WSNs) is to preserve continuously and effectively the coverage of an area (or region) of interest to be monitored, while simultaneously preventing as much as possible a network failure due to battery-depleted nodes. In this paper, we propose a protocol, called distributed lifetime coverage optimization protocol (DiLCO), which maintains the coverage and improves the lifetime of a wireless sensor network. First, we partition the area of interest into subregions using a classical divide-and-conquer method. Our DiLCO protocol is then distributed on the sensor nodes in each subregion in a second step. To fulfill our objective, the proposed protocol combines two effective techniques: a leader election in each subregion, followed by an optimization-based node activity scheduling performed by each elected leader. This two-step process takes place periodically, to choose a small set of nodes remaining active for sensing during a time slot. Each set is built to ensure coverage at a low energy cost, allowing to optimize the network lifetime. Simulations are conducted using the discrete event simulator OMNET++. We refer to the characteristics of a Medusa II sensor for the energy consumption and the computation time. In comparison with two other existing methods, our approach is able to increase the WSN lifetime and provides improved coverage performances.
- Subjects
WIRELESS sensor networks; PROGRAM transformation; WIRELESS sensor nodes; COMPUTER simulation; ENERGY consumption of computers
- Publication
Journal of Supercomputing, 2015, Vol 71, Issue 12, p4578
- ISSN
0920-8542
- Publication type
Article
- DOI
10.1007/s11227-015-1558-x