基于移动锚节点的无线传感器网络节点坐标校正

Node Coordinate Calibration in Wireless Sensor Networks Based on Mobile Anchor Node

提出一种通过测量移动锚节点的方位信息校正无线传感器网络中传感器节点坐标的算法.对于锚节点位置精确已知、概率分布已知和完全未知等情况,首先给出了传感器节点的定位方法,然后从理论上分析了传感器节点的定位误差,最后提出了传感器节点在不同坐标轴上坐标的独立校正方法.仿真结果表明,所提算法能够有效避免错误校正的发生,提高了传感器节点的位置精度.

A scheme is proposed to calibrate the sensor node coordinate with the bearing measurement of a mobile anchor node in wireless sensor networks. For the cases that the location of the mobile anchor node is known, uncertain and unknown, a method to estimate the sensor node location is firstly presented; the node localization error is then theoretically analyzed; and a method to calibrate the sensor node coordinates in different coordinate axes is lastly proposed. Simulation results show that the proposed scheme efficiently avoids errors in calibration and improves the sensor node position accuracy.