无线传感器网络中节点定位算法

Localization Algorithm in Wireless Sensor Networks

近年来,无线传感器网络作为一种新型的数据采集技术得到了空前的发展,研究能够满足实际应用的定位算法成为一个新的热点。考虑到无线传感器节点的成本、性能、功耗和应用领域等不同因素的影响,已经出现了许多实用的定位算法。基于锚点的质心算法定位精度高,而与锚点无关的ABC算法的成本低。通过结合这两种定位算法的优点,提出了一种改进算法。在减少质心算法锚点数目的情况下控制ABC算法的误差在可接受的范围内,从而来满足实际应用对精确度的要求。最后讨论了使用改进算法需要注意的两方面因素和如何根据实际应用来进行选择。

Wireless sensor networks becomes a new data collection technology of autonomous sensor nodes.The research on localization algorithm in the actual applications has been very hot.In this situation,a number of excellent localization algorithm appeared according to various factors,such as the cost,power and applications areas.As we know,the anchor-based mass algorithm has higher precision while the anchor-free ABC algorithm has lower cost.In order to take advantages of them,a new localization algorithm is presented.It does not only control the precision within endure ranges of ABC algorithm,but also reduces the number of anchors of the mass algorithm.So it can meet the needs of the actual applications.Finally,the attentions of the new localization algorithm is indicated.