E-CHATSEP: Enhanced CHATSEP for clustered heterogeneous wireless sensor networks

The Critical Heterogeneous Adaptive Threshold Sensitive Stable Election Protocol (CHATSEP) is a reactive protocol having three different energy values for sensor nodes. It incorporates a special adaptive feature of informing the observing base station about the status of the network if there is no transmission to the base station from a long time due to reactive nature of the network. It also includes the concept of Critical Threshold to give priority to important information, so that such information can be communicated directly to the controlling station or through any intermediate node. A modification based on CHATSEP has been proposed in this work. E-CHATSEP aims to prolong the stable period of the sensor nodes by considering an energy factor as well as a distance parameter in determining the threshold value that will be used for new enhanced cluster heads election. The proposed scheme is found to be more efficient than related protocols like LEACH, SEP, TSEP and CHATSEP in terms of throughput, lifetime and energy consumed for a temperature sensing application.