Abstract: In this work an energy-efficient cluster based routing protocol for Wireless Sensor Networks (WSNs) is proposed in which a monitor node is deployed in the network to enhance the overall network performance. The network divided the deployed sensor nodes into four logical regions on the basis of their locality in the sensing ?eld. The nodes will directly communicate with Base station and Monitor node in two regions, in which Base station and Monitor node is deployed. Whereas for remaining two regions, cluster hierarchy is used to transmit the data and cluster heads from these regions will further send their data to the nearest destination either Base station or Monitor node. The monitor node is high power node deployed in the network. Further, in proposed work result of throughput and percentage of alive nodes of Leach are compared with the results of proposed algorithm that is Mon-Leach.

Keywords: Leach, WSN’s, cluster head, routing protocol, Mon-Leach etc.