CAN总线网络传输的延时优化研究  

Optimization Research on CAN Bus Transmission Delay

作　　者：杜峰 蔡一杰 关志伟 唐风敏 吴迪[2] Du Feng;Cai Yijie;Guan Zhiwei;Tang Fengmin;Wu Di(Tianjin Intelligent Transportation Technology Engineering Center,Tianjin 300222;Tianjin University of Technology and Education,Tianjin 300222;Tianjin Sino-German University of Applied Sciences,Tianjin 300350;China Automobile Research Institute(Tianjin)Automotive Engineering Research Institute Co.,Ltd.,Tianjin 300300;Hebei University of Technology,Tianjin 300401)

机构地区：[1]天津市智能交通技术工程中心,天津300222 [2]天津职业技术师范大学,天津300222 [3]天津中德应用技术大学,天津300350 [4]中汽研(天津)汽车工程研究院有限公司,天津300300 [5]河北工业大学,天津300401

出　　处：《汽车技术》2022年第1期35-40,共6页Automobile Technology

基　　金：国家重点研发计划项目(2017YFB0102500);天津市人工智能科技重大专项(17ZXRGGX00070);天津市自然科学基金项目(16JCZDJC38200)。

摘　　要：为减小CAN总线网络延时对传输速率的影响,提出了一种报文偏移量补偿与标识符优化的混合优化方案。首先定义总线网络传输延时,研究了表征CAN总线网络数据传输延时的主要指标,然后设计了报文分段与编码方案优化方法和延时报文的偏移量补偿方法,最后采用二者相结合的方案改善延时情况,并利用Symtavision软件分别对优化前、后CAN总线延时的主要指标进行仿真比较。分析结果表明,采用偏移量补偿与标识符优化的混合优化方案减少了高度延时和中度延时报文的数量,提高了网络传输速率与可扩展性。In order to reduce the impact of CAN bus network delay on transmission rate,this paper proposes a hybrid optimization scheme of message offset compensation and identifier optimization.Firstly,the transmission delay of the bus network is defined,and the main indicators that characterize the data transmission delay of the CAN bus network are studied.Then the message segmentation and coding scheme optimization method and the delay message offset compensation method are designed.Finally the combination of the two methods is used to improve the delay situation,and symtavision software is used to simulate and compare the main indicators of the two CAN bus delay conditions before and after optimization.The analysis results show that the hybrid optimization scheme using offset compensation and identifier optimization reduces the number of highly delayed and moderately delayed messages,and improves the network transmission rate and scalability.

关 键 词：CAN总线 传输速率 延时 偏移量补偿 标识符优化 

分 类 号：TN929.11[电子电信—通信与信息系统]