移动无线物联网感知层传感节点定位算法研究

Sensor Node Localization Algorithm in Sensing Layer of Mobile Wireless Internet of Things

为了解决当前算法在锚节点密度较低时,传感节点定位精度不高的问题,提出了移动无线物联网感知层传感节点定位算法。建立了包含锚节点误差的移动无线物联网模型;根据共线度筛选候选锚节点。加权平均处理锚节点可信度,计算每个未知传感节点的平均跳距和定位误差,将计算误差低于设定阈值的未知传感节点转化为锚节点,并对初步定位结果进行循环位置修正,实现感知层传感节点定位。仿真结果表明,所提算法在锚节点密度相同时的定位误差低于2.5 cm。

In order to solve the problem that the sensor node positioning accuracy is not high when the anchor node density is low,a sensor node positioning algorithm in the sensing layer of mobile wireless Internet of things is proposed.A mobile wireless Internet of things model including anchor node error is established.Candidate anchor nodes are screened according to collinearity.The reliability of the anchor node is handled according to the weighted average,the average hop distance and the positioning error of each unknown sensor node are calculated,the unknown sensor node whose calculation error is lower than the set threshold is converted into the anchor node,and cyclic position correction on the preliminary positioning results is carried out to realize the positioning of the sensor node in the sensing layer.Simulation results show that the positioning error of the proposed algorithm is less than 2.5 cm when the anchor node density is the same.