论文部分内容阅读
节点定位是无线传感器网络的应用基础和重要支撑技术之一.目前对于节点定位已有大量的研究成果,但面向室内三维定位的研究尚少,也没有推出有效的定位算法.本研究在考虑建筑物中节点按水平分层分布的特点及非高精度三维定位无法解决楼层判定问题后,提出一种分层结构的定位思想,即给节点预设楼层参数,通过投影测距算法利用节点间的投影距离进行三边定位从而降低网络拓扑对算法的影响,而且使三维定位从至少需要4个信标节点减少到3个.仿真结果表明,该算法比DV-Hop算法的定位精度的定位覆盖率都高,并且在信标节点比例较低及网络稀疏的情况下表现出较好的鲁棒性和稳定性.
Nodal location is one of the basic applications and important supporting technologies of wireless sensor networks.Nowadays, there are a lot of research results on the location of nodes, but there are few researches on 3D indoor location and no effective location algorithm.This dissertation, According to the characteristics of hierarchical distribution of objects and the non-accurate three-dimensional positioning of nodes can not solve the problem of floor determination, this paper proposes a hierarchical structure of positioning ideas, that is, to the node preset floor parameters, projection distance measurement algorithm using nodes Projection distance to reduce the impact of the network topology on the algorithm and reduce the 3D positioning from at least 4 beacon nodes to 3. The simulation results show that the positioning accuracy of the proposed algorithm is better than that of DV-Hop algorithm Are high, and show better robustness and stability when the beacon node has a lower proportion and a sparse network.