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Sensors 2014, 14(5), 7655-7683; doi:10.3390/s140507655
Article

An Uncertainty-Based Distributed Fault Detection Mechanism for Wireless Sensor Networks

* ,
,
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State Key Laboratory of Networking and Switching Technology, Beijing University of Posts and Telecommunications, No.10 Xitucheng Road, Haidian District, Beijing 100876, China
* Author to whom correspondence should be addressed.
Received: 14 February 2014 / Revised: 14 April 2014 / Accepted: 17 April 2014 / Published: 25 April 2014
(This article belongs to the Section Physical Sensors)
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Abstract

Exchanging too many messages for fault detection will cause not only a degradation of the network quality of service, but also represents a huge burden on the limited energy of sensors. Therefore, we propose an uncertainty-based distributed fault detection through aided judgment of neighbors for wireless sensor networks. The algorithm considers the serious influence of sensing measurement loss and therefore uses Markov decision processes for filling in missing data. Most important of all, fault misjudgments caused by uncertainty conditions are the main drawbacks of traditional distributed fault detection mechanisms. We draw on the experience of evidence fusion rules based on information entropy theory and the degree of disagreement function to increase the accuracy of fault detection. Simulation results demonstrate our algorithm can effectively reduce communication energy overhead due to message exchanges and provide a higher detection accuracy ratio.
Keywords: fault detection; uncertainty; evidence fusion; data missing; information entropy fault detection; uncertainty; evidence fusion; data missing; information entropy
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Yang, Y.; Gao, Z.; Zhou, H.; Qiu, X. An Uncertainty-Based Distributed Fault Detection Mechanism for Wireless Sensor Networks. Sensors 2014, 14, 7655-7683.

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