Integrated coverage and connectivity configuration in wireless sensor networks
Proceedings of the 1st international conference on Embedded networked sensor systems
IEEE Communications Magazine
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Most wireless sensor networks (WSN) researches assume that the network is connected and there is always a path connected by wireless links between a source and a destination. In this paper, we argue that network partitioning is not an uncommon phenomenon for practical WSN applications, especially when the sensor nodes are deployed in a hash working environment. We first present a simple distributed method to detect the occurrence of network partitions. Some critical survival nodes would be selected to re-connect to the sink after certain network disruption happens. Two reconnection approaches, Transmission Range Adjustment (TRA) and Message Ferry (MF), are then proposed. We study their performances in terms of power consumption by taking the specifications of the commercial sensor nodes into account. Simulation results show that TRA is more appropriate for the current implementation of WSN. However, MF has the potential to be more energy-efficient if there is a powerful wireless transmitter and a larger amount of buffers at each sensor node.