中文摘要：

为研究节点移动方向、移动速度等因素对车载自组织网络（VANET）链路动态性的影响,通过限制实际VANET环境中的道路宽度和节点传播范围定义节点有效覆盖区域,建立链路动态分析模型,推导出链路持续时间及其累计分布函数的理论表达式。通过仿真实验对理论结果进行验证,得出理论计算与仿真数据吻合较好的结论,并表明节点移动速度、道路宽度和节点传播范围等因素对链路持续时间都有一定程度的影响,其中节点传播范围所占比重相对较大。

英文摘要：

In order to study the influence of node movement direction and movement speed on the dynamism of Vehicular Ad Hoc Network（ VANET）,a link dynamic analysis model is established by limiting the path width and node propagation range in the actual VANET environment. The theoretical expression of link duration and its Cumulative Distribution Function（ CDF） are derived. The theoretical results are verified by the simulation experiment,and the results showthat the theoretical analysis results are in good agreement with the simulation data,and node movement speed,road width and node transmission range have a certain impact on the results,however the node transmission range on the VANET link duration is relatively large.