VANET运动模型解析解与数值解的比照分析

依据车载自组织网络(VANET)的高移动性特征分别建立VANET运动解析模型与运动仿真模型.通过两种运动模型得到VANET度分布的解析解与数值解.对它们进行比照分析,发现两种度分布曲线均呈现出小度值的节点个数众多、大度值节点个数较少的特点,符合幂律函数分布,由此证明VANET是一个无标度网络.另外,从理论分析与仿真实验两个角度证明,VANET对随机性攻击具有较高的鲁棒性,但对针对性攻击则表现出网络的脆弱性.

Contrast Analysis of Analytical Solution and Numerical Solution to the VANET Mobility Model

Considering the high mobility characteristics of vehicular ad-hoc network (VANET)， a mobility analytical model and a mobility simulation model were established. The analytic solution and the numerical solution of the VANET degree distribution were obtained by the two proposed mobility models. Comparing the two degree distribution curves， it is shown that there are lot of nodes with small degree values， while a few nodes with huge degree values， which means that the degree distribution follows the power law function， proving that the VANET is a scale-free network. And the theoretical analysis and simulation experiment verified the high robustness of the VANET against random attacks and its vulnerability when facing targeted attacks.