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- 2017
航空电子AFDX与AVB传输实时性抗干扰对比
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Abstract:
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。
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.
| [1] | BOUDEC J Y L.Network calculus:A theory of deterministic queuing systems for the Internet[M].Berlin:Springer,2001:7-24. |
| [2] | CRUZ R L.A calculus for network delay.Part Ⅰ. Network elements in isolation[J].IEEE Transaction on Information Theory,1991,37(1):114-131. |
| [3] | CRUZ R L. A calculus for network delay. Part Ⅱ. Network analysis[J].IEEE Transaction on Information Theory,1991,37(1):132-141. |
| [4] | CHANG C S.Performance guarantees in communication networks[M].London:Springer,2000:4-22. |
| [5] | SCHARBARG J L,RIDOUARD F,FRABOUL C.A probabilistic analysis of end-to-end delays on an AFDX avionic network[J]. IEEE Transaction on Industrial Informatics,2009,5(1):28-41. |
| [6] | ARINC 664.Aircraft data network,Part 7:Avionics full duplex switched Ethernet(AFDX)network[S].Annapolis:Aeronautical Radio,2005:9-18. |
| [7] | IEEE 802.1 AVB Task Group.IEEE 802.1 audio/video bridging (AVB)[EB/OL].(2013-03-20)[2016-04-10].http://www.ieee802.org/1/pages/avbridges.html. |
| [8] | STEINBACH T,LIM H T,KORF F,et al.Tomorrow's in-car interconnect? A competitive evaluation of IEEE 802.1 AVB and time-triggered ethernet(AS6802)[C]//2012 IEEE Vehicular Technology Conference.Piscataway,NJ:IEEE Press,2012:1-5. |
| [9] | ALDERISI G,IANNIZZOTTO G,BELLO L L.Towards 802.1 Ethernet AVB for advanced driver assistance systems:A preliminary assessment[C]//2012 IEEE 17th International Conference on Emerging Technologies and Factory Automation. Piscataway,NJ:IEEE Press,2012:1-4. |
| [10] | ZINNER H,NOEBAUER J,SEITZ J,et al.A comparison of time synchronization in AVB and FlexRay in-vehicle networks[C]//2011 Proceedings of the 9th Workshop on Intelligent Solutions in Embedded Systems. Piscataway,NJ:IEEE Press,2011:67-72. |
| [11] | IEEE.IEEE standard for local and metropolitan area networks,virtual bridged local area networks,Amendment 14:Stream reservation protocol (SRP)[S].New York:IEEE,2010:1-5. |
| [12] | BAUER H,SCHARBARG J L,FRABOUL C.Improving the worst-case delay analysis of an AFDX network using an optimized trajectory approach[J].IEEE Transaction on Industrial Information,2010,6(4):521-533. |
| [13] | MANDERSCHEID M,LANGER F.Network calculus for the validation of automotive Ethernet in-vehicle network configuration[C]//2011 International Conference on Cyber-Enable Distributed Computing and Knowledge Discovery.Piscataway,NJ:IEEE Press,2011:206-211. |
| [14] | GEYER F,HEIDINGER E,SCHNEELE S,et al.Evaluation of audio/video bridging forwarding method in avionics switched Ethernet context[C]//2013 IEEE Symposium on Computers and Communications.Piscataway,NJ:IEEE Press,2013:000711-000716. |
| [15] | HEIDINGER E,GEYER F,SCHNEELE S,et al.A performance study of audio video bridging in aeronautic Ethernet networks[C]//7th IEEE International Symposium on Industrial Embedded Systems.Piscataway,NJ:IEEE Press,2012:67-75. |
| [16] | JEON S,LEE J,PARK S.Dual-path method for enhancing the performance of IEEE 802.1 AVB with time-triggered scheme[C]//201521st Asia-Pacific Conference on Communications.Piscataway,NJ:IEEE Press,2015:519-523. |
| [17] | MEYER P,STEINBACH T,KORF F,et al.Extending IEEE 802.1 AVB with time-triggered scheduling:A simulation study of the coexistence of synchronous and asynchronous traffic[C]//IEEE Vehicular Networking Conference.Piscataway,NJ:IEEE Press,2011:47-54. |
| [18] | ALDERISI G,IANNIZZOTTO G,BELLO L L.Simulative assessments of IEEE 802.1 Ethernet AVB and time-triggered Ethernet for advanced driver assistance systems and in-car infotainment[C]//2012 IEEE Vehicular Networking Conference.Piscataway,NJ:IEEE Press,2012:187-194. |
| [19] | 王彤,赵琳,何锋.航空电子音视频传输AVB以太网络[J].电光与控制,2016,23(1):1-6.WANG T,ZHAO L,HE F.Research on audio video bridging(AVB) for avionics network[J].Electronics Optics & Control,2016,23(1):1-6(in Chinese). |
| [20] | IEEE.IEEE standard for local and metropolitan area networks,virtual bridged local area networks,Amendment 12:Forwarding and queuing enhancements for time-sensitive streams[S].New York:IEEE,2009:1-17. |
| [21] | BAUER H,SCHARBARG J L,FRABOUL C. Applying trajectory approach to AFDX avionics network[C]//14th Emerging Technologies & Factory Automation.Piscataway,NJ:IEEE Press,2009:1-8. |
| [22] | 代真,何锋,张宇静,等.AFDX虚拟链路路径实时寻优算法[J].航空学报,2015,36(6):1924-1932.DAI Z,HE F,ZHANG Y J,et al.Real-time path optimization algorithm of AFDX virtual link[J].Acta Aeronautica et Astronautica Sinica,2015,36(6):1924-1932(in Chinese). |
| [23] | 蒲小勃.现代航空电子系统与综合[M].北京:航空工业出版社,2013:55-89.PU X B.Modern avionics system and integration[M].Beijing:Aviation Industry Press,2013:55-89(in Chinese). |
| [24] | 熊华钢,王中华.先进航空电子综合技术[M].北京:国防工业出版社,2009:85-90.XIONG H G,WANG Z H.Advanced avionics integration techniques[M].Beijing:National Defense Industry Press,2009:85-90(in Chinese). |
