无线传感器网络数据融合研究

Survey on Data Fusion of Wireless Sensor Networks

数据融合是无线传感器网络的一个研究热点,能减少传感器节点间传输的数据量和能量消耗,从而明显提高网络即时性能,延长网络生命周期,减小时间延迟。文章首先介绍了无线传感器网络中数据融合的必要性,然后介绍了数据融合的原理、层次、结构,重点介绍了多传感器数据融合的三个层次,并比较了三个融合层次的优缺点,最后对数据融合的发展趋势进行了展望。

Data fusion which is a hot topic in a wireless sensor networks （WSN）, can reduce the communication overhead and energy expenditure of sensor nodes, to significantly improve the performance of real-time network, extend the network lifetime, and reduce the time delay. This paper firstly introduced the necessity of data fusion in WSN. Then the fusion principle, the fusion level, the fusion architecture and WSN were introduced, especially the three levels of multi-sensor data fusion and their advan-tages and disadvantages.Finally, the developing trend of data fusion were discussed.