The coverage problem in a wireless sensor network
WSNA '03 Proceedings of the 2nd ACM international conference on Wireless sensor networks and applications
Approximate Coverage in Wireless Sensor Networks
LCN '05 Proceedings of the The IEEE Conference on Local Computer Networks 30th Anniversary
Reliable and energy-efficient routing protocol in dense wireless sensor networks
International Journal of Sensor Networks
Receiver-oriented load-balancing and reliable routing in wireless sensor networks
Wireless Communications & Mobile Computing - Distributed Systems of Sensors and Actuators
International Journal of Sensor Networks
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The sensor node deployment schemes are considered for a hierarchical all-optical fibre sensor network (AOFSN), as it mainly affects the sensing accuracy. High sensing accuracy requires high coverage ratio and low blind ratio, while low sensing cost requires less number of sensor nodes/switches and low overlapping ratio. Considering the above requirements, we propose the close-packing based sensor node deployment (CPSD) scheme for two dimensions. Then the CestPSD scheme is extended to three dimensions and is named as 3-D CestPSD. AOFSN applying the 2-D/3-D CestPSD schemes can obtain maximum coverage and minimum blind ratio while maintaining no overlapping ratio. The reliability of AOFSN using 2-D/3-D CestPSD deployment is then discussed and improved by proposing efficient switch architectures and switch deployment schemes. The network performances of sensing accuracy and the reliability of AFOSN are numerically analysed and compared in terms of coverage ratio, overlapping ratio, blind ratio and node density.