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The critical speeds and radii for converage in sensor networks

注意：本论文已在《Lecture Notes in Control and Information Sciences Volume 344/2006 / Intelligent Control and Automation 》:106-117发表
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ZANG Chuan-zhi1,2　 LIANG Wei1　 YU Hai-bin1
(1．Shenyang Institute Automation，Chinese Academy of Sciences，Shenyang 110016；
2．Graduate School of the Chinese Academy of Sciences，Beijing 100049，China)　

Abstract: In sensor network the coverage problem is very important to topology control, energy saving, routing and et al. Compared to the well known sensor model and exposure model, a modified sensor model and a modified exposure model are used to analyze the critical parameters for coverage. The modified sensor model can deal with more general conditions, and the modified exposure model is more reasonable than the known ones. Based on these models, the sensor physical characteristics and the target properties, we analyze the coverage problem mathematically and identify two critical speeds and two critical radii of influence of the sensor node. Using these results, it is easy to estimate the critical sensor density or the critical number of sensor nodes required to cover a given area.
Keywords: sensor network - coverage - exposure

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