Mobile ad hoc network is a collection of mobile nodes that are powered by battery for their operation. Globalized power aware routing protocols such as Minimum Battery Cost Routing (MBCR) and Min-Max Battery Cost Routing (MMBCR) selects a path considering the total transmission powers of nodes in a given route without considering the individual node transmission power and a path with nodes having maximum battery capacity for transmission of data packets from source to destination respectively. MBCR do not consider individual node battery power resulting in early network breakdown by selecting a route with less energy node. Though MMBCR considers individual node battery power during route discovery process, the route selected does not change unless any node in that route is exhausted completely resulting in network failure. This paper proposes a Source Based Energy Efficient Dynamic Route Discovery (SBEEDRD) mechanism wherein the selection of route for transmission of data is decided by the source node instead of destination node. The protocol adapts a new route dynamically before the link breaks (due to node battery exhaustion) resulting in increasing the lifetime of the network. The performance of the proposed routing protocol is compared with the existing MMBCR and EEDRD protocol. Simulation results show that the proposed protocol not only increases the lifetime of the network but also gives better throughput and packet delivery ratio, reduced delay and routing overhead.

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Network Lifetime Battery Capacity Energy Level Throughput Packet Delivery Ratio Delay Routing Overhead