AECHE: ADAPTIVE ENERGY EFFICIENT CLUSTER HEAD ELECTION MECHANISM FOR REACTIVE WIRELESS SENSOR NETWORKS.

Wireless sensor network (WSN) has developed as one of the most promising technologies for the future. This has been achieved by advances in technology to avail small, inexpensive, and smart sensors, which result in cost effective and easily deployable WSNs. Clustering technique is used in communication protocols, so that considerable amount of energy has been conserved while transmitting the data to the cluster head rather than directly to the far away sink. In some applications, the sensors will be triggered to send data when the sensed data exceed the threshold value. In these circumstances, limited number of sensor nodes gets activated and sends the data and remaining nodes are under idle mode. Hence energy consumption is more in these activated regions, which leads to death of sensors nodes. It is concentrated on these activated sensors and find the change in the ratio between the active nodes and alive nodes to calculate the optimal cluster number for each round. The optimum number of clusters is calculated so that the balanced clusters are created. Extensive analysis has been made with e isting protocols, and found that the proposed methodology out performs the existing protocol in terms of networks life time and throughput. [ABSTRACT FROM AUTHOR]