面向大规模确定性网络的全局循环排队与转发机制  

Global cyclic queuing and forwarding mechanism for large-scale deterministic networks

作　　者：莫益军 杨子涵 刘辉宇[1] 何天流 MO Yijun;YANG Zihan;LIU Huiyu;HE Tianliu(School of Computer Science and Technology Huazhong University of Science and Technology,Wuhan 430074,China)

机构地区：[1]华中科技大学计算机科学与技术学院,湖北武汉430074

出　　处：《电信科学》2021年第10期55-65,共11页Telecommunications Science

基　　金：国家重点研发计划项目(No.2020YFB1805203)。

摘　　要：时延抖动敏感的工业控制和远程驾驶应用驱动网络由尽力而为服务向确定性转发服务转变。为满足确定性应用时延抖动的有界需求,工业界和学术界在逐流过滤整形和队列转发控制方面进行了大量研究,实现了小规模以太网环境下轻载稳定流的微秒级时延和亚微秒级抖动保障。多数研究因较少考虑长距离网络拓扑变化、传输时延波动和短时突发流量过载等影响,难以满足大规模骨干网场景下的确定性要求。在循环排队转发(cyclic queuing and forwarding,CQF)基础上,考虑了源目的路径特性和确定性流量强度因素,提出了全局循环排队转发三队列(global cyclic queuing and forwarding 3-queue,GCQF-3),并在基于OMNeT++搭建的确定性网络仿真系统中,比较了CQF、CQF-3和GCQF-3的转发控制机制,实验表明GCQF-3能根据确定性流量状态及时调整门控时机和排队优先级,在时延、抖动和网络利用率等方面都达到最佳。Delay and jitter sensitive industrial control and remote driving application-driven network by best-effort to deterministic service.To meet the deterministic application of delay and jitter demands,industry and academia have conducted detailed research on stream filtering shaping and queue forwarding control,implementing microsecond delay and microsecond jitter of light load steady in small-scale ethernet environment.However,the study seldom considers the effects of long-distance topology change,transmission delay fluctuations and short-time traffic overloads,challenging to meet deterministic requirements under large-scale backbone networks.For this challenge,based on cyclic queuing and forwarding,considers source-destination path properties and deterministic traffic intensity,the global cyclic queuing and forwarding three-queue was proposed.The deterministic network simulation system was based on OMNeT++.Experiments compare queue forwarding control mechanisms such as CQF,CQF-three and GCQF-three.Results show that GCQF-three can timely adjust the gatecontrol and queueing priority according to the deterministic traffic state,achieves the best in delay,jitter and network utilization.

关 键 词：确定性网络 大规模骨干网 循环队列转发 流量整形 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]