基于分层模型的FlexRay车载网络容错检错机制研究

FlexRay是可应用于车用实时控制系统的通信协议。本文首先分析了它的时钟同步、容错及检错功能。在此基础上,建立了网络抽象分层传输模型。根据此模型,对FlexRay在车用分布式实时控制系统中的错误检测应用进行研究,通过关注协议对错误即时识别分类,分情况讨论各个抽象层在错误发生时层内机制的处理过程,发现FlexRay可在较短时间内定位错误所在的网络层,集中检测该层工作状况最终迅速对错误作出反应。

Research on fault tolerance and error detection mechanism of the vehicle-mounted network FlexRay based on layered model

FlexRay is communication protocol which can be used for vehicle-used real-time control system. Firstly, we analyze its clock synchronization, fault tolerance and error detection mechanism. Secondly, we propose a layer network model base on the mechanism and operational principle. Furthermore, we discuss the error diagnosis and operation detection of FlexRay in real-time communication, The experiment shows that the error can be located in certain network layer in short time. Finally, the conclusion is given that FlexRay is the reliable choice for the next generation of vehicle-used networks.