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    Please use this identifier to cite or link to this item: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/59816

    Title: Decentralized and Energy-Balanced Algorithms for Maintaining Temporal Full-Coverage in Mobile WSNs
    Authors: Chang, Chih-Yung;Hung, Li-Ling;Lu, Yun-Jung;Chang, Sheng-Wen;Chen, Yu-Chieh
    Contributors: 淡江大學資訊工程學系
    Keywords: Coverage;Eenergy-balanced;Hole-movement;Mobile sensor;WSN
    Date: 2010-05
    Issue Date: 2011-10-05 22:18:06 (UTC+8)
    Publisher: Oxford: John Wiley & Sons Ltd.
    Abstract: Coverage is one of the most important issues in Wireless Sensor Networks (WSNs). However, full coverage only can be achieved when surplus mobile sensors contribute a coverage area larger than the hole size. When there is no surplus mobile sensor to cover a big hole, previous studies have utilized mobile sensors by moving the hole from one location to another, therefore achieving temporal full-coverage, where each location on the monitoring region has been ever covered by mobile sensors during a fixed time interval. However, with only some mobile sensors participating in the hole-movement task, this results in an energy-imbalance WSN. This paper considers a mobile WSN that contains a big hole where there exists no redundant mobile sensor to heal the hole. Three distributed algorithms, called Basic, Forward-Only, and Any-Direction movement mechanisms, are proposed to achieve the purpose of temporal full-coverage in a way that the total energy consumption is minimized or that the energy consumption of all mobile sensors that participate in the hole-movement task are balanced. Simulation results reveal that the proposed hole-movement mechanisms enhance the coverage of WSNs and balance the energy consumption of mobile sensor nodes.
    Relation: Wireless Communications and Mobile Computing 12(5), pp.445–462
    DOI: 10.1002/wcm.977
    Appears in Collections:[Graduate Institute & Department of Computer Science and Information Engineering] Journal Article

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