改进的TTE网络RC流量延迟上界整体分析方法

发布时间：2019-03-17 21:17

【摘要】：时间触发以太网(TTE)中的速率约束(RC)流量受到按预先定义时刻发送的高优先级时间触发(TT)流量的抢占,采用传统的固定优先级/先入先出(FP/FIFO)的模型进行整体法(holistic)分析,得到的RC流量延迟上界值过于保守。根据RC流量在网络的传输过程中受到TT流量消息抢占的具体情况进行分析,提出适用于TTE网络RC流量的改进整体法。将网络拓扑的TT调度时刻表作为参数,分析RC流量在特定时间抖动区间内TT流量的抢占情况,通过遍历RC流量发送相位得出最坏情况延迟。理论分析和案例仿真验证结果表明,采用该方法得到的RC流量的端到端延迟上界值更加合理。
[Abstract]:Rate-constrained (RC) traffic in the time-triggered Ethernet (TTE) is preempted by high-priority time-triggered (TT) traffic sent at a predefined time. The traditional fixed priority / first-in-first-out (FP/FIFO) model is used for integer (holistic) analysis, and the upper bound of RC traffic delay is too conservative. Based on the analysis of the situation that RC traffic is preempted by TT traffic message in the transmission process of TTE network, an improved integer method suitable for RC traffic of TTE network is proposed. Taking the TT scheduling schedule of the network topology as a parameter, the preemption of RC traffic in a given time jitter range is analyzed, and the worst-case delay is obtained by traversing the transmission phase of RC traffic. The results of theoretical analysis and case simulation show that the end-to-end delay upper bound of RC traffic obtained by this method is more reasonable.
【作者单位】：北京航空航天大学电子信息工程学院;
【基金】：国家自然科学基金项目(61301086) 航空科学基金项目(20131951027)
【分类号】：TP393.11

【相似文献】