车载CAN网关实时性分析与改进  

Real-time analysis and optimization of vehicle CAN-CAN gateway

作　　者：王渝卉[1,2] 郝矿荣[1] 丁永生[1] 陈胜瑜 

机构地区：[1]东华大学信息科学与技术学院,上海201620 [2]上海华东汽车信息技术有限公司,上海200001

出　　处：《机电工程》2012年第8期873-876,共4页Journal of Mechanical & Electrical Engineering

基　　金：国家自然科学基金重点资助项目(61134009);国家自然科学基金资助项目(60975059);教育部高等学校博士学科点专项科研基金资助项目(20090075110002);上海市优秀学术带头人计划资助项目(11XD1400100);上海领军人才专项资金资助项目(未提供);上海市科学技术委员会重点基础研究资助项目(11JC1400200;10JC1400200);上海市科学技术委员会技术标准专项资助项目(10DZ0506500)

摘　　要：为改进车载网关在实际应用中的实时性能,减少网关延时,将主从节点调度方法引入车载CAN的网关调度中。分析了影响车载CAN网关实时性的因素,根据车载CAN网关的信号路由、报文调度方式和网络负载对网关传输延时的影响,设计了一种基于信号更新位的改进型CAN网络主从节点调度算法;通过使用实际网关硬件和TELLUS汽车网络仿真工具构建了实验平台,并对该调度算法进行了评价。研究结果表明,采用该改进型主从节点调度算法的网关延时最多可以比传统调度方式减少4.6%,可提高车载CAN网关的实时性能。In order to solve the problem of improving real-time characteristics of CAN-CAN gateway, the causes of transmission delay were investigated. After analyzing the influence of gateway routing time, frame transmission time and CAN network bus-load, an optimization design of improved master-slave node scheduling algorithm based on update bit of signal was introduced. The optimization design was evaluated on a simulation platform given by CAN-CAN gateway hardware and TELLUS^TM too1 of CETC-motor company. The experiment results show that the CAN-CAN gateway with improved master-slave node scheduling algorithm can decrease the transmission delay by about 4.6 percent and well meet the real-time characteristic of CAN gateway.

关 键 词：车载CAN网关 传输延时 信号更新位 改进型主从节点调度算法 

分 类 号：TP336[自动化与计算机技术—计算机系统结构] U461[自动化与计算机技术—计算机科学与技术]