Proceedings of 2nd International Conference on Information Technology and Computer Science Held on 9 th – 10 th July 2016, in Pattaya, ISBN: 9788193137345 144 OPTIMIZED ENERGY AWARE ROUTING SCHEME FOR MOBILE AD HOC NETWORKS Mr. Makarand R. Shahade Asst. Prof., Department Of I.T J.D. Institute of Engg. & Technology, Yavatmal, INDIA Dr. D. N. Chaudhari Professor, Department. Of CSE. J.D.Institute of Engg. & Tech., Yavatmal, INDIA Abstract - One important characteristic of MANETs is that the nodes are energy-constrained. Since, nodes are battery-operated, recharging frequently or replacing batteries may become undesirable or even impossible. The nodes in Mobile Ad-hoc Networks (MANET) are limited battery-powered. This not only leads to degradation in performance of the network but also reduces the lifetime of the network and in some cases makes the network partitioned. In order to maximize the lifetime of MANETs, routes having nodes with low energy and nodes with more buffered packets should be avoided. so, the energy efficiency is one of the primary metrics of interest. Energy efficient routing in MANETs is considered as a major issue. In this Paper, a new energy efficient scheme in the routing protocol for mobile ad hoc network has been proposed which will efficiently utilize the battery power of the mobile nodes in such a way that the algorithm improves the network energy consumption and increases the lifetime of the network. The popular on demand routing protocols use shortest path between sources to destination without considering the energy of the intermediate nodes in the path. The proposed algorithm not only considers energy of the node while selecting the route but also takes into account the number of packets buffered in the node. More number of buffered packets means remaining energy will be less and time taken to deliver a packet will be more. Keywords - Mobile ad hoc network; Routing Protocol; Energy Efficient Routing; Packet buffered; I. INTRODUCTION MANET has emerged as one of the most focused and thrust research areas in the field of wireless networks and mobile computing. In ad hoc mobile networks, routes are mainly multi hop because of the limited radio propagation range and topology changes frequently and unpredictably since each network host moves randomly. Therefore, routing is an integral part of ad hoc communications. Many routing protocols are proposed for MANET. The protocols are mainly classified in to three categories: Proactive, Reactive and Hybrid. Proactive routing protocols attempt to maintain consistent, up-to-date routing information from each node to every other node in the network. Reactive routing protocols create routes only when desired by the source node. Once a route has been established, it is maintained by a route maintenance procedure. Hybrid Routing Protocol which combines the merits of proactive and reactive approach and overcome their demerits. Nodes in Ad Hoc networks should be enabled to manage efficiently their energy consumption to prolong the network lifetime [1]. The energy consumption of each node varies according to its communication state: transmitting, receiving, listening or sleeping state. Any power failure of a node will affect the overall network lifetime. As a result, energy efficiency should be taken into consideration as it is a critical and extensive research issue. Mobile phones, laptops and PDAs are the devices used as nodes in MANETs, as shown in figure 1. Researchers and industry both are working on the mechanism to prolong the lifetime of these devices. Hardware manufacturers are also coming forward to help in saving the battery power by making energy efficient devices like energy efficient CPUs, low