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    题名: On Connected Target Coverage for Wireless Heterogeneous Sensor Networks with Multiple Sensing Units
    作者: 石貴平;Shih, Kuei-ping;Deng, Der-jiunn;Chang, Ruay-shiung;Chen, Hung-chang
    贡献者: 淡江大學資訊工程系
    关键词: connectivity;heterogeneous sensors;multiple sensing units;target coverage;wireless sensor networks
    日期: 2009-01-01
    上传时间: 2010-08-09 18:52:20 (UTC+8)
    出版者: Molecular Diversity Preservation International (MDPI)
    摘要: The paper considers the connected target coverage (CTC) problem in wireless heterogeneous sensor networks (WHSNs) with multiple sensing units, termed MU-CTC problem. MU-CTC problem can be reduced to a connected set cover problem and further formulated as an integer linear programming (ILP) problem. However, the ILP problem is an NP-complete problem. Therefore, two distributed heuristic schemes, REFS (remaining energy first scheme) and EEFS (energy efficiency first scheme), are proposed. In REFS, each sensor considers its remaining energy and its neighbors’ decisions to enable its sensing units and communication unit such that all targets can be covered for the required attributes and the sensed data can be delivered to the sink. The advantages of REFS are its simplicity and reduced communication overhead. However, to utilize sensors’ energy efficiently, EEFS is proposed. A sensor in EEFS considers its contribution to the coverage and the connectivity to make a better decision. To our best knowledge, this paper is the first to consider target coverage and connectivity jointly for WHSNs with multiple sensing units. Simulation results show that REFS and EEFS can both prolong the network lifetime effectively. EEFS outperforms REFS in network lifetime, but REFS is simpler.
    關聯: Sensors 9(7), pp.5173-5200
    DOI: 10.3390/s90705173
    显示于类别:[資訊工程學系暨研究所] 期刊論文

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