Routing in Wireless Sensor Network (WSN) is usually an important area of research. Rapidly increasing applications of sensor nodes in monitoring of physical environment has led to an increased significance of WSN. Modified LEACH-R introduces the energy efficient clustering scheme for Wireless Sensor Network which is dependent on Low Energy Adaptive Clustering Hierarchy structure and removed many of the limitations of the Enhanced LEACH-R protocol. Modified LEACH-R uses the remaining energy of the current cluster head which makes the process of routing better and efficient. In heterogeneous network, a cluster head node aggregate and collects data from their member nodes and send that aggregated data towards the base station. The proposed protocol uses super advance nodes. The role of super advance nodes is to act as cluster head and to perform the task of data aggregation while consuming low power during operation. Modified LEACH-R protocol is tested and simulated in MATLAB software package. Modified LEACH-R protocol increases the frequency of packets that can be transmitted between base stations to cluster heads and between cluster head and nodes. The findings of the simulation revealed that MODIFIED LEACH-R provides better results as compared to Enhanced LEACH-R and LEACH-R protocol. Modified LEACH-R protocol enhances the time of first dead node and as well as increases the duration of operation of the last node and hence enhances the overall network lifetime.

wireless sensor network, energy efficient routing, super advance nodes, advance nodes, normal nodes, dead nodes, clustering, LEACH, LEACH-R.