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Chain-based barrier coverage in WSNs: toward identifying and repairing weak zones

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Abstract

Barrier coverage constructs a sensing barrier for detecting intruders crossing a belt region. Recent studies mostly focus on efficient algorithms to guarantee barrier coverage, with little consideration on the collaboration between individual nodes. Observing that in many situations, sensors naturally fall into several clusters (or components), for example when the sensors are deployed uniformly at random with a relatively low density, or when random sensors go down as a result of energy exhaustion, we propose to use chain as a basic scheduling unit for sensing and communication. A chain is a set of sensors whose sensing areas overlap with each other, and it can be extracted from a cluster. We present a distributed algorithm, named BARRIER, to provide barrier coverage with a low communication overhead for the wireless sensor networks (WSNs). The algorithm is able to detect weak zones that are often found in an initial deployment of a WSN, and repair them by adding an appropriate number of sensors. Theoretic analysis and simulations show that, compared with a representative previous algorithm, BARRIER significantly reduces the communication overhead and reparation cost in terms of number of sensors.

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Acknowledgments

This work was supported in part by the National Natural Science Foundation of China under Grants 61271226, 61272410, 61202460 and 61471408; by the National High Technology Research and Development Program (“863” Program) of China under Grants 2014AA01A701 and 2015AA011303; by the National Natural Science Foundation of Hubei Province under Grant 2014CFA040; by the China Postdoctoral Science Foundation under Grants 2014M560608; and by the Fundamental Research Funds for the Central Universities under Grant 2015QN073.

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Correspondence to Hongzhi Lin.

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Liu, T., Lin, H., Wang, C. et al. Chain-based barrier coverage in WSNs: toward identifying and repairing weak zones. Wireless Netw 22, 523–536 (2016). https://doi.org/10.1007/s11276-015-0988-y

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