Improved AODV routing protocol for wireless sensor network based on ZigBee
ICACT'09 Proceedings of the 11th international conference on Advanced Communication Technology - Volume 1
Measurements and characterization of link quality metrics in energy constrained IEEE 802.15.4
WTS'10 Proceedings of the 9th conference on Wireless telecommunications symposium
Repairing sensors strategies in fault-tolerant wireless sensor networks
Proceedings of the 8th ACM Symposium on Performance evaluation of wireless ad hoc, sensor, and ubiquitous networks
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In this paper, we have proposed two distributed preventive maintenance strategies dedicated for large-scale wireless sensor networks (WSNs) using a reduced number of mobile robots : (i) Fixed Distributed Preventive Maintenance Strategy denoted by F-DPMS, (ii) Adaptive Distributed Preventive Maintenance Strategy denoted by A-DPMS. F-DPMS and A-DPMS are based on a simple analytical model to estimate the expected failures. To share the sensors repair load among the available robots, F-DPMS subdivides the WSN sensing area in equal surface subareas. Each maintainer robot is assigned to a single one area to deal with its anticipated failures. In contrary, A-DPMS uses an adaptive area partitioning technique depending on the distribution of failures over the network map, in order to balance the repair load sharing. Simulation has shown that both F-DPMS and A-DPMS provide a null network dysfunction time with a sufficient number of robots. Obtained results show also that A-DPMS requests a minimal number of robots lower than F-DPMS. But, it produces a heavier signaling cost. To remedy this problem, we have proposed a new version of A-DPMS denoted by A-DPMS*. The novel maintenance strategy reduces not only the introduced signaling messages, but also the traveled distance achieved by the maintainer robots to replace the expected failures.