改進(jìn)的TTE網(wǎng)絡(luò)RC流量延遲上界整體分析方法
發(fā)布時(shí)間：2019-03-17 21:17
【摘要】：時(shí)間觸發(fā)以太網(wǎng)(TTE)中的速率約束(RC)流量受到按預(yù)先定義時(shí)刻發(fā)送的高優(yōu)先級時(shí)間觸發(fā)(TT)流量的搶占,采用傳統(tǒng)的固定優(yōu)先級/先入先出(FP/FIFO)的模型進(jìn)行整體法(holistic)分析,得到的RC流量延遲上界值過于保守。根據(jù)RC流量在網(wǎng)絡(luò)的傳輸過程中受到TT流量消息搶占的具體情況進(jìn)行分析,提出適用于TTE網(wǎng)絡(luò)RC流量的改進(jìn)整體法。將網(wǎng)絡(luò)拓?fù)涞腡T調(diào)度時(shí)刻表作為參數(shù),分析RC流量在特定時(shí)間抖動區(qū)間內(nèi)TT流量的搶占情況,通過遍歷RC流量發(fā)送相位得出最壞情況延遲。理論分析和案例仿真驗(yàn)證結(jié)果表明,采用該方法得到的RC流量的端到端延遲上界值更加合理。
[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.
【作者單位】： 北京航空航天大學(xué)電子信息工程學(xué)院;
【基金】：國家自然科學(xué)基金項(xiàng)目(61301086) 航空科學(xué)基金項(xiàng)目(20131951027)
【分類號】：TP393.11
本文編號：2442710
[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.
【作者單位】： 北京航空航天大學(xué)電子信息工程學(xué)院;
【基金】：國家自然科學(xué)基金項(xiàng)目(61301086) 航空科學(xué)基金項(xiàng)目(20131951027)
【分類號】：TP393.11
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