It is important to ensure the network lifetime in wireless sensor network. Wireless sensor networks have led to many new protocols specifically designed for sensor networks where energy awareness is an essential consideration. A node elects itself as a cluster head based not only on its residual energy but also on its mobility in order to achieve balanced energy consumption among all nodes and thus longer lifetime of the network. In our proposed framework we consider an energy efficient cluster head selection mechanism. CGSR protocol which gives better path for transmission. In our WSN, we have to split up our network in to regions. Each region have cluster head and cluster member. The node which have the highest energy is act as a cluster head and all the information is handle by this cluster head. Also proposes a heuristic algorithm to find an obstacle-avoiding shortest route for the mobile sink. For that we use we use the algorithm to construct the spanning graph of the network model. According to the spanning graph, we obtain all obstacle-avoiding paths. Proposed mobile sink, which collects the data from cluster head reduces the routing obstacles. Simulation result shows, our proposed technique enhance the network lifetime from analyzing delay, energy, and throughput.