一种基于立体交通场景的CAB广播路由算法

针对立体交通环境下，经典车载自组网广播协议可能出现的数据误传率高、网络延时大、传输不可靠等问题.提出了一种基于路侧单元装置(RSU， Road Side Unit)的准确高效的广播算法CAB(Cubic traffic Adaptive Broadcast Routing Algorithm).该算法根据立体交通不同的应用场景，将广播分为前向、后向和全向类型.同时，通过特殊hello包交换邻居节点信息.通过统计邻居表信息来选择下一跳转播节点，以达到缩短广播时延，提高广播效率的目的.针对立体交通中数据误传率高的问题，引入了车道判别方案和一跳广播确认机制提高其传输的可靠性.使用NS-3和VanetMobiSim仿真结果表明，与现有经典的广播算法相比，该协议在立体交通场景下有更好的包到达率、更轻的网络负载和更低的传输时延.

A CAB broadcast routing algorithm based on 3D transportation scene

In this paper the vehicle self-organized network broadcasting protocol is studied under 3D transportation environment. In order to handle the data error， network delay， unreliable transmission， we propose a novel accurate and efficient algorithm Cubic traffic Adaptive Broadcast Routing (CAB) based on the Road Side Unit (RSU). In this algorithm， the broadcasting is divided into forward， backward and all-direction types according to the application in 3D transportation environment. Meanwhile， neighboring note information is exchanged using hello package exchange. By choosing the next broadcasting node based on the neighboring node statistics， the broadcasting efficiency is improved. For the data error problem in 3D transportation， the vehicle lane classification and the first jump confirmation method are introduce. Using NS-3 and VanetMobiSim to simulate the results， the proposed algorithm exhibits better package arrival rate， lower network loads， and smaller network delay， compared with the traditional broadcasting algorithms.