tailieunhanh - Báo cáo hóa học: " Research Article Scalable Coverage Maintenance for Dense Wireless Sensor Networks"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Scalable Coverage Maintenance for Dense Wireless Sensor Networks | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2007 Article ID 34758 13 pages doi 2007 34758 Research Article Scalable Coverage Maintenance for Dense Wireless Sensor Networks Jun Lu Jinsu Wang and Tatsuya Suda Bren School of Information and Computer Sciences University of California Irvine CA 92697 USA Received 1 October 2006 Accepted 30 March 2007 Recommended by Mischa Dohler Owing to numerous potential applications wireless sensor networks have been attracting significant research effort recently. The critical challenge that wireless sensor networks often face is to sustain long-term operation on limited battery energy. Coverage maintenance schemes can effectively prolong network lifetime by selecting and employing a subset of sensors in the network to provide sufficient sensing coverage over a target region. We envision future wireless sensor networks composed of a vast number of miniaturized sensors in exceedingly high density. Therefore the key issue of coverage maintenance for future sensor networks is the scalability to sensor deployment density. In this paper we propose a novel coverage maintenance scheme scalable coverage maintenance SCOM which is scalable to sensor deployment density in terms of communication overhead . number of transmitted and received beacons and computational complexity . time and space complexity . In addition SCOM achieves high energy efficiency and load balancing over different sensors. We have validated our claims through both analysis and simulations. Copyright 2007 Jun Lu et al. 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. 1. INTRODUCTION The recent advances in microsensor and communication technologies have increased the possibility of manufacturing inexpensive small wireless sensors with simple sensing

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