| Summary: | 碩士 === 國立中央大學 === 資訊工程研究所 === 97 === Due to the procedure of experiment in wireless sensor networks (WSNs) is cumbersome and the network simulators cannot present the real effects of wireless communications such as signal fading and anisotropic propagation, the WSN testbeds become a good solution for performance evaluation. In this paper, we design and implement a distributed architecture for wireless sensor network testbed. Our testbed can deploy WSNs in different locations and connects them through the Internet and gateways. The testbed allows the researchers both to submit their experiments and get the reports of performance evaluation through web interface. In the outdoor applications, power consumption is an important metric to evaluate the performance of WSN protocols. In our testbed, we also propose a software-based with hardware-supported scheme to measure the energy consumption of sensor nodes for the experiments. We compare our estimations with the measurements from oscilloscope. The results show that the differences between our testbed and oscilloscope are slight. However, the measurements from oscilloscope may contain more errors than our scheme since the current waveform and its duration time are unstable.
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