Abstract
Reducing power consumption and increasing battery life of nodes in an ad hoc network require an integrated power control and routing strategy. The control is better attained by new route selection mechanisms for MANET routing protocols, which we call Energy Based Time Delay Routing (EBTDR) and Highest Energy Routing (HER). These two algorithms try to increase the operational lifetime of an ad hoc network. In this paper, a couple of modifications to the basic DSR protocol are proposed so as to make it energy efficient. First, a delay is introduced in forwarding the packets by nodes, which is inversely proportional to the remaining energy level of the node (EBTDR). Second, energy information is included on the Route Request (RREQ) packet and the route is selected based on this information (HER). The energy Drain Rate (DR) is included in the cost metric to improve the fidelity of the HER algorithm as it provides an optimised solution by the link traffic in the network. Based on the simulation results obtained, it is observed that our algorithms increase the lifetime of Mobile Ad hoc Networks (MANETs), at the expense of delay in route discovery and control overhead.
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