摘要
为解决智能车载网络中MAC层由于链路不稳定、信道冲突、广播风暴等问题导致的数据丢包严重问题,提出采用基于路段分区的区域优化泛洪广播协议,充分结合道路交通以及车辆运行状态情况,设计能动态自适应调整相关参数以优化性能的M AC协议,提高信息广播的可靠性.设计的路段域红灯等停路口车辆簇头机制,通过将网络分割成相对独立、自治的子簇,将广播信息的传输限制在同路段的簇内和该路段内有限的节点之间进行.簇内通信引入RTS-CTS握手方式以及簇内竞争窗口调节机制,设计了综合考虑城市网络环境以及车辆自身特性的自适应MAC竞争窗机制.仿真实验表明,该方案针对不同的道路交通流量都能获得较好的网络传输性能,非常适合于大规模、动态变化的智能城市车载网络.
In order to solve the serious problem of packet loss in intelligent vehicle network MAC layer,such as the problems of unstable links、channel conflict、the broadcast storm,we plan to adopt the optimization of regional flooding broadcast protocol based on road partition and vehicle running conditions in road,to design a MAC protocol that can self-adjustment of related parameters dynamically to optimize performance,and to improve the reliability of broadcast. The road domain of red light stop intersection cluster head mechanism can limite the transmission of broadcasting information between the cluster within the same section of the road and limited nodes of the section,by dividing the network into independent、autonomous sub-culster. Intra-cluster communication introduces RTS-CTS handshake and the cluster contention windowadjustment mechanism,it designs a self-adaptive MAC contention windowmechanism considering urban network environment and the characteristics of vehicle. Simulation shows that the solutions can get better performance of network transmission in different road traffic,which is very suitable for large,dynamic changes of intelligent urban vehicle network.
出处
《小型微型计算机系统》
CSCD
北大核心
2016年第3期531-534,共4页
Journal of Chinese Computer Systems
基金
国际合作重大专项基金项目(2010DFB90460)资助
国家自然科学基金项目(61363077)资助
校青年成长基金资助
