A hierarchical scheme for data aggregation in sensor network

Sensor networks are wireless networks that are capable of obtaining and processing physical world information from scattered sensor devices. Its performance is largely constrained by limited power, slow processor, and less memory in each device. Recently, a data-centric scheme called directed diffusion has been proposed to provide efficient data transmission over sensor networks. In this paper, we enhance this scheme by a hierarchical aggregation technique. Experiments demonstrate that our enhanced scheme can save transmission energy to 50% over directed diffusion. Moreover, with the principle of parent selection embedded, our enhanced scheme can obtain higher reliability and provide more applicable data aggregation.