FlexRay总线静态段网络资源利用率优化研究  

Research on Optimization of Network Resource Utilization in Static Segment of FlexRay Bus

作　　者：何欣航 李而康[1] 张宏超[1] He Xinhang;Li Erkang;Zhang Hongchao(China North Vehicle Research Institute,Beijing 100072,China)

机构地区：[1]中国北方车辆研究所,北京100072

出　　处：《系统仿真学报》2022年第3期564-572,共9页Journal of System Simulation

摘　　要：为了提高FlexRay总线的网络资源利用率,针对静态段调度对网络进行优化。分析FlexRay通信机制,建立报文模型并推导出带宽损失的计算方法,同时考虑协议开销与网络空载,以静态帧数目与静态帧有效负载长度为设计变量,通过求解此多目标优化问题来获得系统整体最优封装方案。最终应用在车辆的底盘综合控制系统进行仿真分析与验证,结果表明,该方案对网络资源利用率有较大提升,且比起仅考虑网络空载,并行考虑协议开销时对网络资源利用率的提升更为明显。In order to improve the utilization of the network resources of the FlexRay bus,the network is optimized for static segment scheduling.The FlexRay communication mechanism is analyzed,the message model is established and the calculation method of bandwidth loss is derived,while considering the protocol overhead and network idling,taking the number of static frames and the length of the static frame payload as design variables,the overall optimal packaging scheme is obtained by solving this multi-objective optimization problem.This solution is finally applied to the vehicle chassis integrated control system for simulation analysis and verification.The results show that the solution has a greater improvement in the utilization of network resources.

关 键 词：FLEXRAY 带宽损失 网络空载 协议开销 调度 

分 类 号：TP336[自动化与计算机技术—计算机系统结构] TP391.9[自动化与计算机技术—计算机科学与技术]