Extended Stable Election Protocol (SEP) for three-level hierarchical clustered heterogeneous WSN

In heterogeneous sensor networks, some nodes become cluster heads which aggregate the data of their cluster nodes and transmit it to the sink. Here, the authors present an extended Stable Election Protocol (SEP) algorithm for cluster head selection in a hierarchically clustered heterogeneous network to reorganize the network topology efficiently. The presented algorithm considers the sensor nodes are static and randomly distributed in the heterogeneous network, the coordinates of the sink and the dimensions of the sensor field are known. Our simulation result shows that the extended SEP algorithm achieves better performance than the existing SEP algorithm in terms of network lifetime and throughput.