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AVB网络流量整形帧模型端到端延迟计算

李二帅 何锋 熊华钢

李二帅, 何锋, 熊华钢等 . AVB网络流量整形帧模型端到端延迟计算[J]. 北京航空航天大学学报, 2017, 43(7): 1442-1449. doi: 10.13700/j.bh.1001-5965.2016.0539
引用本文: 李二帅, 何锋, 熊华钢等 . AVB网络流量整形帧模型端到端延迟计算[J]. 北京航空航天大学学报, 2017, 43(7): 1442-1449. doi: 10.13700/j.bh.1001-5965.2016.0539
LI Ershuai, HE Feng, XIONG Huaganget al. End-to-end traffic latency computation using frame shaping model in AVB network[J]. Journal of Beijing University of Aeronautics and Astronautics, 2017, 43(7): 1442-1449. doi: 10.13700/j.bh.1001-5965.2016.0539(in Chinese)
Citation: LI Ershuai, HE Feng, XIONG Huaganget al. End-to-end traffic latency computation using frame shaping model in AVB network[J]. Journal of Beijing University of Aeronautics and Astronautics, 2017, 43(7): 1442-1449. doi: 10.13700/j.bh.1001-5965.2016.0539(in Chinese)

AVB网络流量整形帧模型端到端延迟计算

doi: 10.13700/j.bh.1001-5965.2016.0539
基金项目: 

国家自然科学基金 61301086

中央高校基本科研业务费专项资金 YWF-15-GJSYS-055

详细信息
    作者简介:

    李二帅  男, 硕士研究生。主要研究方向:实时网络

    何锋  男, 博士, 讲师。主要研究方向:航空电子综合、实时调度、实时网络

    熊华钢  男, 博士, 教授, 博士生导师。主要研究方向:航空电子综合、机载网络

    通讯作者:

    何锋, E-mail:robinleo@buaa.edu.cn

  • 中图分类号: TP393

End-to-end traffic latency computation using frame shaping model in AVB network

Funds: 

National Natural Science Foundation of China 61301086

the Fundamental Research Funds for the Central Universities YWF-15-GJSYS-055

More Information
  • 摘要:

    音视频桥接技术(AVB)以传统以太网为基础,通过基于信用量的整形(CBS)算法进行流量整形,提供了音视频流确定性传输的基础保障。在CBS流模型的延迟分析计算基础上,考虑了AVB网络中数据帧实际排队和调度的离散特性,提出了一种改进的CBS帧模型来计算音视频流量的排队传输延迟,并推导了帧模型下最坏延迟计算公式。采用典型的车载网络应用场景对2种模型进行演算验证,结果表明:同流模型相比,CBS帧模型中得到的端到端延迟更小,显示出更好的紧性评估效果,同时这种紧性评估在针对低优先级流量的延迟分析时,差异会更加显著。

     

  • 图 1  AVB中流量排队及转发过程

    Figure 1.  Queuing and forwarding for AVB streams

    图 2  CBS算法

    Figure 2.  CBS algorithm

    图 3  流模型下的CBS

    Figure 3.  CBS based on stream model

    图 4  帧模型下的CBS

    Figure 4.  CBS based on frame model

    图 5  网络拓扑模型[13]

    Figure 5.  Network topology model[13]

    图 6  端到端延迟结果对比

    Figure 6.  Comparison of end-to-end latency results

    表  1  流量配置表

    Table  1.   Traffic configuration

    消息类型 带宽/(Mbit·s-1) 最大帧长/byte 突发量/byte
    SR_A(CS) 0.512 64 640
    SR_B(VS) 16.97 1 522 70 012
    BE(MVS) 15.70 1 522 65 446
    下载: 导出CSV
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出版历程
  • 收稿日期:  2016-06-22
  • 录用日期:  2016-11-04
  • 刊出日期:  2017-07-20

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