This article focused on the energy limit propertyof Wireless Sensor Network, and proposed a residual energybased algorithm WRECS, which is improved on classicalrouting algorithm LEACH. The algorithm took thenormalized residual energy and the cumulative number ofthe normal nodes supported by the cluster heads as clusterheadsselection parameters. In order to balance the energyconsumption of each cluster-head, the algorithm took boththe different positions of the base station and the initialenergy of the network into consideration, and weighted thetwo factors to balance the energy consumption betweentransmission and data fusion. Simulation results show thatthe algorithm can promote the lifetime of the uneven energynetwork and does not impair the effects of the LEACHalgorithm.
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