无线传感器网络中的定位技术研究

传感器网络是综合了传感器、嵌入式计算、网络及无线通信等技术的一种全新信息获取和处理技术。由于许多应用需要精确的定位,因此过去几年无线传感器网络定位技术得到广泛关注。研究了几种典型的定位技术,并根据距离误差、节点密度、anchor节点数量和所需设备等要求对各算法进行了性能分析、比较。最后总结了这些定位技术用于无线传感器网络中存在的问题,并提出了下一步工作的设想,即研究一个公共的三阶段的分布定位算法。

Research on Localization Technology of Wireless Sensor Networks

Sensor network, which is made by the convergence ofsensor, nested computation techniques, networks and wirelesscommunications techniques, is a novel technology about acquir-ing and processing information. Wireless sensor networks havebeen proposed for a multitude of location - dependent applica-tions, so the wireless sensor networks localization problem hasreceived considerable attention in the past. Recently a numberof location algorithms have been proposed specifically for wire-less sensor networks. In this paper, localization techniques arereviewed, and the effectiveness of some localization algorithmsare evaluated according to range error, connectivity, anchorfraction and required device. The main conclusion is that nosingle algorithm performs best, there is significant room for im-proving accuracy and/or increasing coverage. The future work isto study a common, three phase, structure in the distributed lo-calization algorithms.