TAILIEUCHUNG - báo cáo hóa học:" Research Article Characterizing the Path Coverage of Random 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 Characterizing the Path Coverage of Random Wireless Sensor Networks | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2010 Article ID 716565 11 pages doi 2010 716565 Research Article Characterizing the Path Coverage of Random Wireless Sensor Networks Moslem Noori Sahar Movaghati and Masoud Ardakani Department of Electrical and Computer Engineering University of Alberta Edmonton Canada T6G 2V4 Correspondence should be addressed to Moslem Noori moslem@ Received 1 November 2009 Accepted 24 February 2010 Academic Editor Xinbing Wang Copyright 2010 Moslem Noori 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. Wireless sensor networks are widely used in security monitoring applications to sense and report specific activities in a field. In path coverage for example the network is in charge of monitoring a path and discovering any intruder trying to cross it. In this paper we investigate the path coverage properties of a randomly deployed wireless sensor network when the number of sensors and also the length of the path are finite. As a consequence Boolean model which has been widely used previously is not applicable. Using results from geometric probability we determine the probability of full path coverage distribution of the number of uncovered gaps over the path and the probability of having no uncovered gaps larger than a specific size. We also find the cumulative distribution function cdf of the covered part of the path. Based on our results on the probability of full path coverage we derive a tight upper bound for the number of nodes guaranteeing the full path coverage with a desired reliability. Through computer simulations it is verified that for networks with nonasymptotic size our analysis is accurate where the Boolean model can be inaccurate. 1. Introduction Wireless sensor networks WSNs have

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