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航空电子AFDX与AVB传输实时性抗干扰对比

赵琳 何锋 熊华钢

赵琳, 何锋, 熊华钢等 . 航空电子AFDX与AVB传输实时性抗干扰对比[J]. 北京航空航天大学学报, 2017, 43(12): 2359-2369. doi: 10.13700/j.bh.1001-5965.2016.0908
引用本文: 赵琳, 何锋, 熊华钢等 . 航空电子AFDX与AVB传输实时性抗干扰对比[J]. 北京航空航天大学学报, 2017, 43(12): 2359-2369. doi: 10.13700/j.bh.1001-5965.2016.0908
ZHAO Lin, HE Feng, XIONG Huaganget al. Comparison of real-time anti-jamming transmission for avionics AFDX and AVB[J]. Journal of Beijing University of Aeronautics and Astronautics, 2017, 43(12): 2359-2369. doi: 10.13700/j.bh.1001-5965.2016.0908(in Chinese)
Citation: ZHAO Lin, HE Feng, XIONG Huaganget al. Comparison of real-time anti-jamming transmission for avionics AFDX and AVB[J]. Journal of Beijing University of Aeronautics and Astronautics, 2017, 43(12): 2359-2369. doi: 10.13700/j.bh.1001-5965.2016.0908(in Chinese)

航空电子AFDX与AVB传输实时性抗干扰对比

doi: 10.13700/j.bh.1001-5965.2016.0908
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:

    赵琳 女, 博士研究生。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: V247;TP393

Comparison of real-time anti-jamming transmission for avionics AFDX and AVB

Funds: 

National Natural Science Foundation of China 61301086

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

More Information
  • 摘要:

    为满足未来航电系统音视频信息传输的需求,考虑车载嵌入式系统的候选实时多媒体网络AVB在航电环境中的应用,并对AVB与AFDX的传输进行了对比研究。首先构建AVB与AFDX标准对比;其次提出基于网络演算的AVB和AFDX端到端延迟计算方法;然后通过定义不同的消息传输场景,采用理论方法分析消息传输实时性的干扰要素;最后利用仿真方法予以验证。在典型1 000条虚拟链路的组网规模下,结果显示:AFDX高优先级流量的端到端延迟优于AVB,对于低优先级流量端到端延迟,则AVB和AFDX各有优劣;但受突发的流量影响,在增加50条各0.22 Mbit/s带宽的低优先级流量干扰情况下,高优先级流量平均端到端延迟的变化率在AVB中为0.25%,在AFDX中为0.38%;在增加50条各0.22 Mbit/s带宽的高优先级流量干扰情况下,低优先级流量平均端到端延迟的变化率在AVB中为5.17%,在AFDX中为10.25%。结果表明:时间敏感消息在AVB网络中传输实时性的抗干扰能力优于AFDX。

     

  • 图 1  AFDX流量调度机制

    Figure 1.  Traffic scheduling mechanism in AFDX

    图 2  AVB流量调度机制

    Figure 2.  Traffic scheduling mechanism in AVB

    图 3  CBS算法

    Figure 3.  CBS algorithm

    图 4  网络演算模型对比

    Figure 4.  Comparison of network calculus models

    图 5  AVB中的帧传输模型Ⅰ

    Figure 5.  The first model of frame transmission in AVB

    图 6  AVB中的帧传输模型Ⅱ

    Figure 6.  The second model of frame transmission in AVB

    图 7  简单AFDX拓扑

    Figure 7.  Simple AFDX topology

    图 8  网络拓扑

    Figure 8.  Network topology

    图 9  AVB与AFDX流量延迟对比

    Figure 9.  Comparison of traffic delay in AVB and AFDX

    图 10  VL151延迟变化对比

    Figure 10.  Comparison of VL151 delay variation

    表  1  SR_A类和SR_B类参数

    Table  1.   Parameters of SR_A and SR_B

    类型 优先级 最大帧长/Byte 发送频率/μs 7跳最大延迟/ms 最大抖动/μs
    SR_A 1 171 125 2 125
    SR_B 1 500 250 50 1 000
    下载: 导出CSV

    表  2  端到端延迟对比

    Table  2.   Comparison of end-to-end delay

    μs
    VL 最小延迟 平均延迟 最大延迟 真实最坏延迟[21] 组网络演算最坏延迟[21]
    1 152.14 152.76 267.47 272 273.6
    2 152.14 152.42 190.12 192 192.4
    3 152.17 153.10 254.06 272 273.6
    4 152.16 152.82 271.10 272 273.6
    5 96.08 96.57 160.15 176 177.6
    下载: 导出CSV

    表  3  配置信息

    Table  3.   Configuration information

    VLi 源节点 目的节点 帧长/Byte AFDX AVB
    BAG/ms 流量类型 ServiceRate/ms MIF 流量类型
    1~50 72 2 低优先级 40 20 SR_B
    51~150 172 16 高优先级 160 10 SR_A
    151~350 800 128 低优先级 1 280 10 SR_B
    351~450 100 8 高优先级 40 5 SR_A
    451~650 200 32 高优先级 320 10 SR_A
    651~850 372 64 低优先级 320 5 SR_B
    851~950 72 4 高优先级 40 10 SR_A
    951~1 000 872 32 高优先级 160 5 SR_A
    951~1 000 872 32 低优先级 160 5 SR_B
    下载: 导出CSV

    表  4  VL151~350平均端到端延迟对比

    Table  4.   Comparison of average end-to-end delay for VL151~350

    场景 平均端到端延迟/ms
    AFDX AVB
    场景1 19.292 15.053
    场景2 21.270 15.831
    下载: 导出CSV

    表  5  VL851~950平均端到端延迟对比

    Table  5.   Comparison of average end-to-enddelay for VL851~950

    场景 平均端到端延迟/ms
    AFDX AVB
    场景1 2.901 3.561
    场景2 2.912 3.570
    下载: 导出CSV
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出版历程
  • 收稿日期:  2016-12-01
  • 录用日期:  2017-02-24
  • 网络出版日期:  2017-12-20

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