通信学报 ›› 2012, Vol. 33 ›› Issue (11): 33-40.doi: 10.3969/j.issn.1000-436x.2012.11.005

• 学术论文 • 上一篇    下一篇

最优的FlexRay静态段配置算法

谢勇,李仁发,阮华斌,彭鑫   

  1. 湖南大学 嵌入式系统及网络实验室,湖南 长沙 410082
  • 出版日期:2012-11-25 发布日期:2017-07-25
  • 基金资助:
    国家自然科学基金资助项目;湖南省研究生科研创新基金资助项目

Optimal configuration algorithm for static segment of FlexRay

Yong XIE,Ren-fa LI,Hua-bin RUAN,Xin PENG   

  1. Embedded Systems&Networking Laboratory,Hunan Univers ty,Changsha 410082,China
  • Online:2012-11-25 Published:2017-07-25
  • Supported by:
    The National Natural Science Foundation of China;The Innovation Foundation for Postgraduate of Hunan Province

摘要:

FlexRay在高带宽、实时性和可靠性等方面具有良好优势,被公认为是新一代的汽车总线标准,但是它配置的复杂性对其应用造成了巨大阻碍。静态段时隙 ID 分配是FlexRay 总线配置的关键内容,从集成了任务层和通信层设计的系统级角度出发,提出一种新的调度单元模型,在对调度单元的可行时隙 ID 空间进行界定和时延进行分析的基础上,利用分支界定法实现最小化系统整体端到端时延的时隙 ID 分配方案的求解。理论证明和实验分析都表明,该方法在优化系统整体的端到端时延方面是最优的。

关键词: FlexRay总线, 汽车电子系统, 总线配置, 分支界定法

Abstract:

FlexRay,which could provide high data bandwidth,time determinism and reliability,was recognized as the standard of the next generation automotive buses,but the complexity of the configuration hindered its wide application in automotive electronics systems.Slot ID assignment of static segment was the key part of its configuration.Started from the system-level point of view,a new system-level scheduling unit model was defined.Based on confining the iable slot IDs and analyzing delay for each scheduling unit,a branch and bound-based searching was carried on to search the optimal slot ID assignment plan that realized the minimization of system’s end-to-end delay.Both theoretical proving and experimental results show that the slot ID assignment method is optimal in optimizing system’s end-to-end delay.

Key words: FlexRay bus, automotive electronic systems, bus configuration, branch and bound

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