To enhance the fidelity and accuracy of the simulation of communication networks,hardware-in-the-loop（HITL） simulation was employed.HITL simulation methods was classified into three categories,of which the merits an...To enhance the fidelity and accuracy of the simulation of communication networks,hardware-in-the-loop（HITL） simulation was employed.HITL simulation methods was classified into three categories,of which the merits and shortages were compared.Combing system-in-the-loop（SITL） simulation principle with high level architecture（HLA）,an HITL simulation model of asynchronous transfer mode（ATM） network was constructed.The throughput and end-to-end delay of all-digital simulation and HITL simulation was analyzed,which showed that HITL simulation was more reliable and effectively improved the simulation credibility of communication network.Meanwhile,HLA-SITL method was fast and easy to achieve and low-cost during design lifecycle.Thus,it was a feasible way to research and analyze the large-scale network.展开更多
In this paper, an extended Kendall model for the priority scheduling input-line group output with multi-channel in Asynchronous Transfer Mode （ATM） exchange system is proposed and then the mean method is used to mod...In this paper, an extended Kendall model for the priority scheduling input-line group output with multi-channel in Asynchronous Transfer Mode （ATM） exchange system is proposed and then the mean method is used to model mathematically the non-typical non-anticipative PRiority service （PR） model. Compared with the typical and non-anticipative PR model, it expresses the characteristics of the priority scheduling input-line group output with multi-channel in ATM exchange system. The simulation experiment shows that this model can improve the HOL block and the performance of input-queued ATM switch network dramatically. This model has a better developing prospect in ATM exchange system.展开更多
针对上海电网各级调度监控系统和数据网络的安全防护,指出安全的重点在于控制安全、信息安全和应用系统的安全。提出了安全防护分区原则和“胖 III 区、瘦 II 区”的分区方案。为适应网络安全分区和安全隔离的需要,横向上建立电网调度...针对上海电网各级调度监控系统和数据网络的安全防护,指出安全的重点在于控制安全、信息安全和应用系统的安全。提出了安全防护分区原则和“胖 III 区、瘦 II 区”的分区方案。为适应网络安全分区和安全隔离的需要,横向上建立电网调度自动化系统数据中心统一支撑平台,纵向上建设基于异步传输模式 ATM 的上海电力调度数据网(Shanghai Power Dispatching Network,ShPDnet)和基于多业务传输平台 MSTP 的电力数据通信网(Shanghai PowerTelecommunication Network,ShPTnet),并分析了安全防护实施过程中应注意的事项。作者提出的防护方案体系结构清晰,有利于应用系统的整改,从而保证上海电网调度核心业务系统的安全稳定运行。展开更多
基金Supported by the National Natural Science Foundation of China (61101129)Specialized Research Fund for the Doctoral Program of Higher Education(20091101110019)
文摘To enhance the fidelity and accuracy of the simulation of communication networks,hardware-in-the-loop（HITL） simulation was employed.HITL simulation methods was classified into three categories,of which the merits and shortages were compared.Combing system-in-the-loop（SITL） simulation principle with high level architecture（HLA）,an HITL simulation model of asynchronous transfer mode（ATM） network was constructed.The throughput and end-to-end delay of all-digital simulation and HITL simulation was analyzed,which showed that HITL simulation was more reliable and effectively improved the simulation credibility of communication network.Meanwhile,HLA-SITL method was fast and easy to achieve and low-cost during design lifecycle.Thus,it was a feasible way to research and analyze the large-scale network.
文摘In this paper, an extended Kendall model for the priority scheduling input-line group output with multi-channel in Asynchronous Transfer Mode （ATM） exchange system is proposed and then the mean method is used to model mathematically the non-typical non-anticipative PRiority service （PR） model. Compared with the typical and non-anticipative PR model, it expresses the characteristics of the priority scheduling input-line group output with multi-channel in ATM exchange system. The simulation experiment shows that this model can improve the HOL block and the performance of input-queued ATM switch network dramatically. This model has a better developing prospect in ATM exchange system.
文摘针对上海电网各级调度监控系统和数据网络的安全防护,指出安全的重点在于控制安全、信息安全和应用系统的安全。提出了安全防护分区原则和“胖 III 区、瘦 II 区”的分区方案。为适应网络安全分区和安全隔离的需要,横向上建立电网调度自动化系统数据中心统一支撑平台,纵向上建设基于异步传输模式 ATM 的上海电力调度数据网(Shanghai Power Dispatching Network,ShPDnet)和基于多业务传输平台 MSTP 的电力数据通信网(Shanghai PowerTelecommunication Network,ShPTnet),并分析了安全防护实施过程中应注意的事项。作者提出的防护方案体系结构清晰,有利于应用系统的整改,从而保证上海电网调度核心业务系统的安全稳定运行。
