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The key point for successful operation of routing based sensor networks is to save power consumption and thus utilize the energy efficiently. Researchers have been working on the same by following standard Type I, II and III sleep scheduling algorithms. In this paper we have proposed a new approach Traffic Dependent Power Conservation, which proactively measures and models the traffic of the network and the sleep window size is estimated by considering the entire traffic of network as a cumulative flow instead of individual patterns. Authors are successful in modeling the proposed approach TDPC (Traffic Dependent Power Conservation) to provide enhanced capability to achieve power conservation.