基于井下异构无线传感器网络DV-Hop定位算法的改进

为了满足矿井安全生产和监测需要,针对井下巷道特殊环境和异构无线传感器网络特点而提出一种改进DV-Hop定位精度的解决方案。该方案考虑了井下节点分布不均匀和平均跳距之间的偏差度对定位精度的影响,在选取跳数和平均跳距的过程中均引入了一个筛选因子,从而得到更加精确的平均跳数和平均跳距,以达到提高定位精度目的。仿真结果表明:该方案能有效提高DV-Hop算法定位精度,更加适合井下弯曲复杂场景的定位。

Improvement of DV-Hop localization algorithm based on underground heterogeneous WSNs

In order to meet requirement of mine safety fabrication and monitoring, in view of special environment of underground roadway and characteristics of heterogeneous wireless sensor networks （WSNs）, put forward a solution to improve positioning precision of DV-Hop. This solution considers impact of non-uniform node distribution and deviation degree of average hop distance on positioning precision, and introduce a screening factor in selection of hop numbers and the average hop distance to get more acurate average hop count and average hop distance to improve positioning precision. Simulation results show that this solution can effectively improve positioning precision of DV-Hop algorithm, and is more suitable for localization of underground curved complex scene.