基于OPNET的混合关键性网络建模与仿真分析
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摘要
混合关键性网络是一种新型的通信架构,可以满足非实时性和实时性业务的需求。为分析其网络性能,提出在OPNET网络仿真环境中建模的方法。以开放式系统互联模型为基础,采用层次化建模,构建网络的节点模型和进程模型。该模型考虑了事件触发和时间触发消息的特点,通过设计调度算法和容错方式,实现了仿真实验的灵活配置和端到端延迟抖动等性能指标的验证。对仿真结果的性能分析表明,混合关键性网络能够保证实时业务的确定性以及兼容标准以太网的非实时业务。
A mixed-criticality system is a novel communication architecture that meets the requirements of all applications from non-real-time application to real-time application. To evaluate mixed-criticality system's performance,the network modeling method is developed based on the OPNET network simulation environment. Based on Open System Interconnection(OSI) model,layered modeling method is adopted to implement node model and process model of mixed-criticality system. By considering the character of time-triggered and event-triggered communication,through designing scheduling algorithm and fault-tolerant modes,the model realizes flexible configuration of simulation and verification of end-to-end delay jitter. The performance analysis from simulations proves that mixed-criticality system achieves determinism property of real-time traffic and is full compatible with non-real-time traffic of standard Ethernet.
A mixed-criticality system is a novel communication architecture that meets the requirements of all applications from non-real-time application to real-time application. To evaluate mixed-criticality system's performance,the network modeling method is developed based on the OPNET network simulation environment. Based on Open System Interconnection(OSI) model,layered modeling method is adopted to implement node model and process model of mixed-criticality system. By considering the character of time-triggered and event-triggered communication,through designing scheduling algorithm and fault-tolerant modes,the model realizes flexible configuration of simulation and verification of end-to-end delay jitter. The performance analysis from simulations proves that mixed-criticality system achieves determinism property of real-time traffic and is full compatible with non-real-time traffic of standard Ethernet.
引文
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[4]赵露茜,李峭,林晚晴,等.基于随机网络演算的TTE网络时延分析[J].航空学报,2016,37(6):1953-1962.ZHAO Luxi,LI Qiao,LIN Wanqing,et al.Stochastic network calculus for analysis of latency on TT Ethernet network[J].Acta Aeronautica et Astronautica Sinica,2016,37(6):1953-1962.(in Chinese)
[5]ADEMAJ A,SIVENCRONA H,BAUER G,et al.Evaluation of fault handling of the time-triggered architecture with bus and star topology[C]//Proceedings of International Conference on Dependable Systems and Networks.San Francisco,CA,USA:IEEE,2003:123-132.
[6]ABUTEIR M,Obermaisser R.Simulation environment for time-triggered ethernet[C]//Proceedings of 11th IEEEInternational Conference on Industrial Informatics(INDIN).Bochun,Germany:IEEE,2013:642-648.
[7]ABUTEIR M,OBERMAISSER R.Scheduling of rateconstrained and time-triggered traffic in multi-cluster TTEthernet systems[C]//Proceedings of 13th IEEE International Conference on Industrial Informatics.Wuhan:IEEE,2015:239-245.
[8]贾琪明,李峭,熊华钢.TTE网络混合关键性通信的仿真与性能分析[J].电光与控制,2015,22(9):8-10.JIA Qiming,LI Qiao,XIONG Huagang.Modeling and performance analysis for mixed-criticality flows in TTE network[J].Electronics Optics&Control,2015,22(9):8-10.(in Chinese)
[9]OBERMAISSER R,OWDA Z,ABUTEIR M,et al.Endto-end real-time communication in mixed-criticality systems based on networked multicore chips[C]//Proceedings of 17th Euromicro Conference on DSD.Verona,Italy:IEEE,2014:293-302.
[10]李晓汀,丁凡,熊华钢.基于OPNET的CAN网络建模与仿真[J].北京航空航天大学学报,2009,35(3):285-287.LI Xiaoting,DING Fan,XIONG Huagang.CAN modeling and simulation based on OPNET[J].Journal of Beijing University of Aeronautics and Astronautics,2009,35(3):285-287.(in Chinese)
[11]徐晓飞,曹晨,郭骏,等.TT-RMS:时间触发网络通信表生成算法[J].北京航空航天大学学报,2015,41(8):1403-1408.XU Xiaofei,CAO Chen,GUO Jun,et al.TT-RMS:communication table generation algorithm of time-triggered network[J].Journal of Beijing University of Aeronautics and Astronautics,2015,41(8):1403-1408.(in Chinese)
[12]刘晚春,李峭,何锋,等.时间触发以太网同步及调度机制的研究[J].航空计算技术,2011,41(4):123-127.LIU Wanchun,LI Qiao,HE Feng,et al.Research on time-triggered ethernet synchronization and scheduling mechanism[J].Aeronautical Computing Technique,2011,41(4):123-127.(in Chinese)
[13]王兆云,王玉文,陈捷,等.基于OPNET交换式局域网仿真建模与分析[J].无线电工程,2014,44(11):11-14.WANG Zhaoyun,WANG Yuwen,CHEN Jie,et al.Simulation modeling and analysis on switching LAN based on OPNET[J].Radio Engineering,2014,44(11):11-14.(in Chinese)