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Based on the topology of underlying ad hoc network, an energy efficient scheme is proposed that takes care of comparative cost in individual links. Within single hop downlink neighbourhood of a node, multiple paths (single or multi-hop) may exist to various downlink neighbours. Depending upon energy consumption in each of them, LNE2S selects the optimum one. Please note that, by the cost of communication from node ni to NJ , LNE2S understands the sum of costs of communication from ni to nj and nj to ni, because acknowledgements are indispensable for successful completion of a communication session. This is a very unique feature of LNE2S. Moreover, a weight based sleeping strategy is also proposed where the best alternative of a node ni bridges the gap between communicating uplink and downlink neighbours of ni, where ni goes to sleep.
Keywords—Ad hoc network, downlink neighbor, energy efficiency, battery powered, energy-oriented link life, velocity oriented link life.
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