摘要
为了满足未来车载通信的高容错性、高可靠性和高实时性的要求,对FlexRay动态段的调度进行了研究。基于柔性时分多址的FlexRay动态段必须根据报文的最坏响应时间进行可调度性分析,使优化调度过程始终满足系统可调度的前提条件。同时采用动态规划的优化调度算法,通过多阶段决策,使系统中所有动态报文的整体最坏响应时间达到最小值。实例分析表明,该算法充分发挥了柔性时分多址的优势,显著提高了FlexRay动态段的带宽利用率。
In order to meet the requirements for future in-vehicle communication, including high fault tolerance, high reliability and better realtime performance, the scheduling of dynamic segment of FlexRay has been studied. Since the dynamic segment of FlexRay is based on flexible time division multiple access, the analysis on scheduling possibility must be carried out according to the worst response time of the messages, thus the optimal scheduling process always meets the sehedulable presupposition. In addition ; by using optimal scheduling algorithm of dynamic programming and multi-stage decision, the minimum integrated worst response time of all the dynamic messages is reached. The practical exampie indicates that the algorithm gives full play to the superiority of flexible time division multiple accesses, and greatly enhances the utilization of the bandwidth of the dynamic segment of FlexRay.
出处
《自动化仪表》
CAS
北大核心
2009年第12期25-29,共5页
Process Automation Instrumentation
关键词
FLEXRAY
动态段
柔性时分多址
动态规划
多阶段决策
调度方案
FlexRay Dynamic segment Flexible time division multiple access Dynamic programming Multi-stage decision Scheduling scheme
