Energy efficient routing protocols for mobile AdHoc networks

Adhoc on demand distance vector routing protocol is specially designed for mobile adhoc networks with reduced overhead using Expanding Ring Search technique. But energy consumption should also be considered in MANET due to battery constrain of the nodes. In this paper, we propose an energy efficient route discovery process for AODV based on ERS. Our approach saves energy of the nodes by avoiding the redundant rebroadcasting of the route request packets. The relaying status of the node is decided based on the broadcasting of its RREQ packets by its neighbors. And it helps in reducing routing overhead incurred during the route discovery process. Simulations are performed to study the performance of Energy Efficient AODV (E²AODV) protocol using GloMoSim, the Global Mobile Simulator. This E²AODV reduces energy consumption by 75-85% compared to AODV. It also reduces routing overhead of around 65-75% and there by reduces 60-70% collisions.