%0 Journal Article %T 航空电子AFDX与AVB传输实时性抗干扰对比<br>Comparison of real-time anti-jamming transmission for avionics AFDX and AVB %A 赵琳 %A 何锋 %A 熊华钢 %J 北京航空航天大学学报 %D 2017 %R 10.13700/j.bh.1001-5965.2016.0908 %X 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。<br>Abstract：AVB is considered to meet the demands of audio video transmission in future avionics system, which is a real-time multimedia network and has become a candidate for in-vehicle embedded systems. Comparative study on AFDX and AVB is implemented. First, standards of AVB and AFDX are compared. Second, the method for end-to-end delay in AVB and AFDX is discussed by network calculus. Then the elements interfering real-time transmission are analyzed depending on different transmission scenarios. Conclusions are verified by simulation. In typical networking with 1 000 virtual links, the results show that the end-to-end delay of high priority traffic in AFDX is smaller than that in AVB; the advantage and disadvantage of end-to-end delay for low priority traffic exist in both AVB and AFDX. But influenced by the burst 50 low priority streams (each with 0.22 Mbit/s bandwidth), the variation rate of average end-to-end delay for high priority traffic is 0.25% in AVB and 0.38% in AFDX; influenced by the burst 50 high priority streams (each with 0.22 Mbit/s bandwidth), the variation rate of low priority traffic is 5.17% in AVB and 10.25% in AFDX. Real-time anti-jamming transmission of time-sensitive information in AVB is superior to AFDX. %K 航空电子网络 %K 音视频桥接(AVB)网络 %K 航空电子全双工交换以太网(AFDX) %K 实时性 %K 抗干扰< %K br> %K avionics network %K audio/video bridging (AVB) network %K avionics full-duplex switched Ethernet (AFDX) %K real-time %K anti-jamming %U http://bhxb.buaa.edu.cn/CN/abstract/abstract14271.shtml