In mobile ad hoc networks, there is no centralized infrastructure to monitor or

A mobile ad hoc network is a collection of wireless nodes that have a dynamic topology and rely on batteries for their operation. Routing in these ad hoc networks is highly complex as there is no central coordinator in contrast to cellular networks. Many routing protocols have been developed for mobile ad hoc networks. Since nodes in an ad hoc network are powered by battery which is limited, there is a need for energy efficient routing protocols to optimize the performance of the network. In this paper we have proposed a new energy efficient dynamic route discovery (EEDRD) protocol which increases the lifespan of the network by efficiently minimizing the routing overhead and managing the power consumed by the nodes in the network. The performance of the proposed protocol is compared with dynamic route discovery (DRD) protocol-a variant of existing energy efficient min-max battery cost routing (MMBCR) protocol. From the simulation results it is observed that the proposed protocol gives increased network lifetime, better throughput performance and packet delivery ratio, less delay and routing overhead as compared to MMBCR and DRD protocols.

Nodes in a mobile ad hoc network have limited battery power. If a node is used frequently for transmission or overhearing of data packets, more energy is consumed by that node and after certain amount of time the energy level may not be sufficient for data transmission resulting in link failure. In this paper, we have considered two routing protocols-Dynamic Source Routing (DSR) & Minimum Maximum Battery cost Routing (MMBCR) and studied their performances in terms of network lifetime for the same network scenario. Simulations are carried out using NS2. Finally from the simulation results we have concluded that MMBCR gives more network lifetime by selecting route with maximum battery capacity thereby outperforming DSR. General TermsEnergy efficiency, MANETS, Routing Protocols.

M obile nodes in an ad hoc wireless network have limited battery power. These nodes need to be energy conserved to maximize the battery life. Thus, development of energy efficient routing protocols is needed due to the limited battery power of all nodes. In this paper, we have considered two on-demand routing protocols-AODV & DSR for mobile ad hoc networks and evaluated the energy performance metrics in all the four modes (transmitting, receiving, idle & sleep) and the residual energy. We have also evaluated other performance metrics such as packet delivery fraction, throughput and end-to-end delay for both protocols. The simulation has been carried out using ns2. Finally, by the observations we conclude that DSR offers the best combination of energy consumption and throughput performance. AODV gives better packet delivery fraction and delay performance compared to DSR in a more stressful conditions i.e., more number of nodes. General TermsM obile ad hoc networks, AODV, DSR.

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