fNode: reducing network packet transmission overhead in indoor heterogeneous wireless sensor networks (ユビキタス・センサネットワーク)

概要

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Wireless sensor networks (WSNs) have become popular because of the availability of a variety of sensor node hardwares, each having its own unique capability. However, combining several sensor node platforms for a certain wireless sensor network application meets many difficulties such as the differences in radio frequency, network protocols and system architectures. Such WSNs are often referred to as a heterogeneous WSN. In our research, we aim to improve performance of a heterogeneous WSN deployed in indoor building environment under common sensor net-working architectures by reducing the total packet transmission occurring. Our approach is to combine the existing WSN infrastructure with fNode, our implementation of a sensor node capable of forwarding packets of different communication architecture, which is used to replace the redundant nodes within the network. We have implemented and evaluated our work under a real-life indoor environment using 15 sensor nodes. Our experimental results show that fNode reduces the total packet transmission overhead, power consumption and latency within the WSN by approximately 30%.
2011-01-13