基于SDN的智能交通架构

软件定义网络(SDN)是近年来备受关注的网络问题,已有学者将其和智慧城市建设进行融合。针对当今交通分散治理现状进行了研究,结合SDN转控分离和集中控制等特性,将其引入智能交通系统(ITS),提出了一个协同管理架构,旨在实现协同管理、改善交通。首先阐述了SDN的特点,利用其特性并结合ITS,提出了基于SDN的智能交通架构;其次,结合动态限速、路径诱导及天气等因素构建了协同管理策略模型,并将其与单一控制策略对比;最后通过仿真实验,对提出的架构策略进行了验证分析。实验结果表明,该架构下的管理与单一控制策略相比,平滑了交通流,使交叉口的平均延误降低20.7%,平均排队长度下降35%。

Traffic intelligence platform based on SDN architecture

Software defined network(SDN)has attracted much attention in recent years.Some scholars have integrated it with smart city construction.In view of the current situation of decentralized traffic management and combined with the characteristics of SDN forwarding and control separation and centralized control,this paper introduced it into intelligent transport system(ITS),and proposed a collaborative management architecture to achieve collaborative management and improve traffic.Firstly,it expounded the characteristics of SDN,and proposed an intelligent traffic architecture based on SDN by using ITS characteristics and combining with ITS.Secondly,it built a collaborative management strategy model combining factors such as dynamic speed limit,path guidance and weather and compared with a single control strategy.Finally,through simulation experiments,it verified and analyzed the proposed architecture strategy.The experimental results show that compared with the single control strategy,the management under this architecture smooths the traffic flow,reduces the average delay at the intersection by 20.7%,reduces the average queue length by 35%.