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为了提高无需测距的距离矢量(DV-Hop)定位算法对随机分布网络节点的定位精度。在分析了DV-Hop算法实现思想的基础上,提出了一种锚节点整体均匀分布优化方案,对该算法节点跳数进行优化。另一方面,在双通信半径算法基础上提出了一种三通信半径改进方法,使得两节点之间的跳数与距离的关系更接近线性规律,最后结合两种改进方法,进行整体仿真。仿真结果表明,锚节点均匀分布的三通信半径DV-Hop算法比双通信半径DV-Hop算法提高定位精度约为7%~8%。
In order to improve the location accuracy of random distributed network nodes by distance-vector-based (DV-Hop) positioning algorithm without distance measurement. Based on the analysis of the idea of DV-Hop algorithm, this paper proposes an optimization scheme of uniform distribution of anchor nodes, and optimizes the hop count of the algorithm. On the other hand, based on the algorithm of dual communication radius, an improved method of three-communication radius is proposed, which makes the relationship between the number of hops and the distance closer to the linear rule. Finally, two improved methods are used to simulate the whole. The simulation results show that the DV-Hop algorithm with uniform communication of anchor nodes improves the positioning accuracy by about 7% -8% compared with DV-Hop algorithm with double communication radius.