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Wireless mobile ad hoc stations have limited battery capacity, hence, Ad Hoc routing protocols ought to be energy conservative. Route discovery is a common operation in routing to resolve many issues relating to energy conservation. In a Mobile Ad Hoc Networks (MANETs) in particular, due to host mobility, such operations are expected to be executed more frequently and a straightforward broadcasting by flooding is usually very costly and will result in serious redundancy, contention, and collision. In this paper, an algorithm is proposed to improve the flooding performance of an Ad Hoc On–Demand Distance Vector (AODV) routing protocol called, Probabilistic–Mean–Energy–Flooding (PMEF) which periodically performs an averaging algorithm Calculate–Average–Energy (CAE) to estimate the average energy Eavg. This algorithm is used in route discovery process to make a rebroadcast decision by the node …