FastDet：为广域网中对时间敏感的流量提供更快的确定性传输

IF 4.4 2区计算机科学 Q1 COMPUTER SCIENCE, HARDWARE & ARCHITECTURE

Computer Networks Pub Date : 2024-11-19 DOI:10.1016/j.comnet.2024.110881

Mengyu Wang , Shuyong Zhu , Yujun Zhang

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引用次数: 0

摘要

广域网（WAN）中新出现的时间敏感型应用对确定性服务质量（QoS）提出了迫切要求，而传统网络无法满足这些要求。确定性网络（DetNet）旨在实现第三层网络的确定性传输。它以周期指定队列和转发（CSQF）机制为基础，能够为时间敏感型数据流提供有限制的延迟和抖动。然而，使用 CSQF 传输时，数据包可能会经历不必要的排队延迟，这将进一步影响数据包的端到端延迟。本文提出了循环快速队列和转发（CFQF）机制来解决这一问题。它根据数据包的到达时间，提前发送符合传输条件的数据包，在保持抖动约束不变的情况下，将数据包的排队延迟减少几个周期。为了在广域网中部署 CFQF，我们提出了 FastDet 架构，该架构可实现更快的确定性传输，并为不同类型的流量提供差异化服务。仿真结果表明，与现有的确定性网络架构相比，FastDet 能以更低的队列延迟为时间敏感型数据流提供有界的端到端延迟和抖动，其他类型数据流的 QoS 也能得到一定程度的保证，这表明其在广域网中应用的可行性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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FastDet: Providing faster deterministic transmission for time-sensitive flows in WAN

Emerging time-sensitive applications in Wide Area Network (WAN) put forward urgent demands for deterministic Quality of Service (QoS), which cannot be satisfied by traditional networks. Deterministic Networking (DetNet) is designed to achieve deterministic transmission in Layer-3 networks. Based on the Cycle Specified Queuing and Forwarding (CSQF) mechanism, it has been able to provide bounded latency and jitter for time-sensitive flows. However, packets may experience unnecessary queuing delay when transmitted with CSQF, which will further affect their end-to-end latency. In this paper, the Cyclic Fast Queuing and Forwarding (CFQF) mechanism is proposed to address the problem. It sends packets meeting transmission conditions in advance according to their arrival time, reducing their queuing delay by several cycles while maintaining the same jitter’s bound. To deploy CFQF in WAN, we present the FastDet architecture that enables Faster Deterministic transmission and offers differentiated services for different types of flows. The simulation results demonstrate that FastDet can provide bounded end-to-end latency and jitter for time-sensitive flows with lower queuing delay than the existing deterministic networking architecture, and the QoS of flows with other types can also be guaranteed to some extent, indicating its feasibility to be applied in WAN.

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来源期刊

Computer Networks 工程技术-电信学

CiteScore

10.80

自引率

3.60%

发文量

434

审稿时长

8.6 months

期刊介绍： Computer Networks is an international, archival journal providing a publication vehicle for complete coverage of all topics of interest to those involved in the computer communications networking area. The audience includes researchers, managers and operators of networks as well as designers and implementors. The Editorial Board will consider any material for publication that is of interest to those groups.