Abstract: To improve data transmission efficiency for vehicular Ad Hoc network, and make data communication between vehicles can be sustained, it proposes a car Ad Hoc network communication protocol with multi-link sensing. In order to ensure that vehicles node sustains transmission of data during the execution of communication tasks, and prevent the communication link disconnection frequently from affecting the transmission quality, time correlation model of vehicle network is proposed to discuss the difference between the speed of the vehicle between the duration of the communication relationship. In order to shorten the total time for data transfer tasks VANET, protocol based on improved ant colony makes multi-link sensing, in order to find the shortest transmission path under the communication needs time. The results show that, compared to routing based on improved geographical information and VANET data transmission algorithm based on optimization link state routing, data transmission task completion time of the proposed algorithm is shortened by 38.4% and 27.3%, the average transmission delay is decreased by 25.5% and 12.1%.

Key words: car Ad Hoc networks, propagation protocol, time correlation model, multi-link sensing

摘要： 为了提高车辆自组织网络（Vehicular Ad Hoc Network，VANET）的数据传输效率，并使车辆间的数据通信能够持续进行，提出一种多向链路感知的车载Ad Hoc网络传播协议。为了保证车辆节点在执行通信任务的过程中实现数据的持续传输，防止通信链路频繁断连影响传输质量，提出了车辆网络的时间关联模型来讨论车辆间的速度差与通信持续时间的关系。为了缩短VANET中用于数据传输任务的总时间，协议基于改进蚁群的方法进行了多向链路感知，从而寻找在保证通信需求时间下的最短传输路径。实验结果分析表明，相比基于改进地理信息路由和基于优化链路状态路由的VANET数据传输算法，该算法的数据传输任务完工时间分别缩短了38.4%和27.3%，平均传输延迟分别降低了25.5%和12.1%。

关键词: 车载Ad Hoc网络, 传播协议, 时间关联模型, 多向链路感知