车载自组织网络安全信息传输机制研究

A Security Information Transmission Mechanism Based on VANET

车载自组织网络(VANET)在车辆间主动交互安全信息,有助于提高驾驶安全性。对车辆进行分簇管理,可提高VANET的网络性能。以城市交通场景为背景,提出了一种基于车辆密度与位置的分簇算法。在分簇的基础上,利用多信道资源,针对安全信息的传输特点和作用范围,设计了多信道安全信息传输机制。簇内通信使用非竞争的TDMA机制,簇间通信使用基于竞争的CSMACA机制。仿真实验结果表明,这种分簇算法以及通信机制能有效提高安全信息传输性能。

VANET actively transmits safety message between vehicles can improve driving safety. Clustering is an effective way to manage vehicles and improve network performance. A relatively stable clustering algorithm based on vehicle density and location is proposed for urban traffic scenarios. After the clustering, a multi-channel safety message transmission protocol is designed according to the transmission characteristics and affecting area of safety message based on multi-channel resources. The non-competitive TDMA mechanism is taken for intra-cluster communications, while the competitive CSMA CA mechanism is taken for inter-cluster communications. The simulation results show that the clustering algorithm and communication mechanism can effectively improve the transmission performance of safety information.