The Wireless Sensor network has placed its inevitable position in monitoring and surveillance purpose. The remote and unattended condition of Wireless Sensor network seeks a new energy efficient algorithm. Enhancing the lifetime of Wireless sensor network has become the primary need to prolong the network lifetime. This paper envisage the increase in lifetime of nodes by properly selecting the cluster head based on the residual energy state and total number of frames transmitted to the sink. The role of sensor node is modelled as Finite State machine and realized as markov process. The process helps in scheduling the role of the sensor node and in the process of cluster head selection. Lifetime enhancement is achieved by selecting optimal cluster head among eligible cluster members. The proposed algorithm outperforms the other algorithms in terms of lifetime and throughput when compared to other protocol. The results supports that Energy aware routing increases the lifetime of the network and serves as the better solution for energy consumption. © 2017 Elsevier Ltd.