车载蠕虫传播建模与仿真

Modeling and Simulating Epidemics of Vehicular Worms

通过对移动模式、通信信道、媒质访问控制和蠕虫传播等环节的建模,分析了蠕虫在车载自组网城市场景稳态下的理论传播结果,大量的蒙特卡洛实验揭示了最小至最大的传输半径、自由流至拥塞流的移动速度、稀疏态至密集态的节点密度等网络状态和媒质访问控制机制对蠕虫传播的影响。通过大量的网络仿真实验研究了蠕虫在相同场景动态下的实际传播结果,讨论了理论值与实际值的关联性,并分析了导致局部差异的原因,指出了感染概率与其他网络参数之间的内在联系,研究结果有助于为工程人员设计智能和自动的无线蠕虫检测和控制措施提供帮助。

The theoretic spreading results under an urban scenario with equilibrium traffic are analyzed through modeling mobility pattern, communication channel, medium access control, worm propagation, and others. The extensive Monte Carlo simulations uncover the effects of the transmission range （from a typical minimum to a maximum）, the minimum velocity and the maximum velocity （from the free flow to the congested traffic）, and the vehicle density （from a sparse topology to a dense spatial relation） on epidemic spreading of such worms in vehicular ad hoe networks. Further, the wireless worm propagation in the same scenario with dynamic traffic is simulated by using network simulation software, the correlation between theoretic results and practical outcome is discussed, and the reasons resulting in the local differences are also analyzed.