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Fig. 14 | EURASIP Journal on Wireless Communications and Networking

Fig. 14

From: Cluster tree topology construction method based on PSO algorithm to prolong the lifetime of ZigBee wireless sensor networks

Fig. 14

Flow chart of reconstruction method with variable threshold. This figure shows the flow chart of a network reconstruction method based on a variable power threshold. As shown in the figure, when the remaining rate of battery energy of any router drops below the threshold that is set to 80%, network reconstruction is performed. It is required that nodes whose remaining power is below the threshold cannot be set as a router. If network reconstruction becomes impossible in the current threshold, the threshold is reduced by 10%. In this case, the node with the remaining power higher than the threshold can be set as the router, and the node below the threshold can only be set as the end-device. In this way, the threshold decreases with 10% step size, and network reconstruction is carried out in a circular way. When the threshold becomes less than 10%, the network structure is maintained and the operation of the network is performed until the remaining energy of any node is below zero

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