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arXiv 2401.13631cs.NI
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量化帧抢占对组合TSN整形器的影响

Quantifying the Impact of Frame Preemption on Combined TSN Shapers

Rubi Debnath, Philipp Hortig, Luxi Zhao, Sebastian Steinhorst

AI总结:

本文量化了将帧抢占与CBS和GCL集成的影响,发现可抢占AVB流延迟降低达40%,并提出保护带方案减少TT流抖动,为TSN配置提供建议。

摘要:

时间敏感网络(TSN)中的不同调度机制可以集成在一起,以设计和支持具有增强能力的复杂架构,用于混合关键网络。将帧抢占(FP)与基于信用的整形器(CBS)和门控控制列表(GCL)集成,开辟了不同的模式和配置选择,导致对多种可能性及其对服务质量(QoS)影响的复杂评估。在本文中,我们通过将FP纳入架构,实现并量化了抢占式CBS与GCL的集成。我们的实验表明,当音频视频桥接(AVB)流被设置为可抢占类时,由CBS整形的AVB流的端到端延迟显著降低(高达40%)。我们进一步表明,在“带保持/释放”模式下,时间触发(TT)流量的抖动不受影响。此外,我们提出在“不带保持/释放”模式中引入保护带(GB)以减少TT流的抖动。我们比较了所有不同的集成模式,从CBS与GCL开始,进一步扩展到FP。我们在合成和现实场景中评估所有可行组合,并为实际配置方法提供建议。

英文摘要:

Different scheduling mechanisms in Time Sensitive Networking (TSN) can be integrated together to design and support complex architectures with enhanced capabilities for mixed critical networks. Integrating Frame Preemption (FP) with Credit-Based Shaper (CBS) and Gate Control List (GCL) opens up different modes and configuration choices resulting in a complex evaluation of several possibilities and their impact on the Quality of Service (QoS). In this paper, we implement and quantify the integration of preemptive CBS with GCL by incorporating FP into the architecture. Our experiments show that the end-to-end delay of Audio Video Bridging (AVB) flows shaped by CBS reduces significantly (up to 40\%) when AVB flows are set to preemptable class. We further show that the jitter of Time Triggered (TT) traffic remains unaffected in "with Hold/Release" mode. Furthermore, we propose to introduce Guardband (GB) in the "without Hold/Release" to reduce the jitter of the TT flow. We compare all the different integration modes, starting with CBS with GCL, extending it further to FP. We evaluate all feasible combinations in both synthetic and realistic scenarios and offer recommendations for practical configuration methods.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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