RSSI-based gradient clustering for wireless sensor networks

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Cluster-based structure is generally used for Wireless Sensor Network ( WSN) in order to reduce the overhead of transmissions and energy consumption. Concerning the problem of load unbalance of nodes in consideration for the mode of data collection in WSN, a RSSI-based Gradient Clustering ( RGC) algorithm was proposed. RGC built the gradient information based on nodes' RSSI values, and then the hierarchical structure of the networks was formed. Taking cluster heads with same gradients or not into consideration, the load-balancing RGC was designed, which reduced the complexity of clustering algorithms and energy consumption efficiently, and the networks lifetime was also lengthened. The simulation results verify the correctness and efficiency of RGC.