LP-ESAR: Lifetime prediction based energy saving routing algorithm for MANET

Mobile Ad-hoc NETwork (MANET) devices are generally powered by battery, and hence are energy constrained. In such a scenario, overloading nodes with forwarding data packets from other nodes leads to quick depletion of energy in the nodes and ultimately leading to its death, and hence network partitioning. Thus, in case of MANETs energy metrics like network lifetime, have to be given its due importance. However, the routing protocol must be flexible enough to allow network administrator to switch priorities between energy saving routing and least delay routing. Some papers have been written to cater to this need, like ESAR [19], EEAODR [20] etc. This paper proposes an improvement to the ESAR protocol, by replacing its energy metric with lifetime prediction. This improves the overall efficiency of ESAR protocol, while retaining the flexibility in regards to choosing between energy efficiency and least delay metric. Simulation results have shown improvement in performance in terms of energy efficiency in our proposed protocol.