传感网中不规则复杂3D平面定位策略研究

The Study of Positioning Strategy of Irregular 3DPlane in Sensor Networks

针对具有障碍物的复杂3D平面定位误差大以及能耗高的问题,如何进行未知节点的定位,提出了一种具有障碍物的不规则复杂3D平面定位策略,该策略将复杂三维平面划分为水平逻辑层并标记节点的所属层,然后在具有障碍物的水平层进行子区域的划分及合并,最后利用大气压传感器测距进行计算未知节点的坐标从而得到3D复杂平面的定位.通过与最新SV定位机制及COLA定位机制在定位误差及能耗进行综合仿真实验对比,本文的定位策略3D-CCD平均定位误差比SV少了5%,比COLA的平均定位误差少8%以上,定位精度上比SV和COLA提高了6.5%以上,及在能耗上比SV和COLA减少了2.7%左右.因此该定位策略(3D-CCD)在解决复杂不规则图形的不确定节点具有较大的优越性.

Considering the large positioning error and high energy consumption concerning irregular and complex 3D plane with obstacles,this paper put forward a new strategy to locate the unknown nodes.This policy divides the complex three-dimensional plane into different logic layers and labels each layer node it belongs to.Then,sub-regions are divided and merged in horizontal layers.Finally,the positioning of 3D complex plane is possible by calculating the location coordinate of unknown nodes after atmospheric pres-sure sensor ranging.Compared with SV and COLA,the 3D-CCD positioning strategy in the average posi-tioning error is 5% less than SV and 8% less than COLA.Its positioning precision increases more than 6. 5%,and the energy consumption reduces 2.7% than SV and COLA.The 3D-CCD has great advantages in terms of positioning error,accuracy and energy.