摘要
面向航空智能制造大批量数据采集与传递的实时性要求,提出一种基于异步光分组交换(optical packet switching,OPS)技术的具有多级管理能力的边缘计算系统方案,满足多源、海量、易构、分布式数据的实时采集、安全交互及预测性分析需求。提出一种基于循环光纤延时线(Rec-fiber delay lines,FDL)全光分组冲突解决机制,建立了系统的稳定性与时延分析模型,并完成仿真分析。结果表明,对于边缘计算节点规模为16385的系统,Rec-FDL冲突解决机制的分组平均最长等待时间为7.63ns,而传统数据重传(PRA)机制的时间为16.85ns。因此,Rec-FDL冲突解决机制能够在交换节点内部进行数据冲突的本地解决,它可避免PRA机制带来的路径时延,同时更有利于系统的扩展。
In order to meet the real-time requirements of large-scale data acquisition and transmission in aviation intelligent manufacturing,an edge computing system with multi-level management capability based on asynchronous Optical Packet Switching(OPS)technology is proposed to meet the requirements of real-time acquisition,security interaction and predictive analysis of multi-source,massive,easy to construct and distributed data.An all-optical packet conflict resolution mechanism based on recyclable optical fiber delay line(Rec-FDL)is proposed.The stability and delay analysis model of the system are established,and the simulation analysis is completed.The results show that the average longest packet waiting time of Rec-FDL conflict resolution mechanism is 7.63ns,while that of traditional data retransmission(PRA)mechanism is 16.85ns.Therefore,Rec-FDL conflict resolution mechanism can solve the data conflict locally within the exchange node,which can avoid the path delay caused by PRA mechanism,and is more conducive to the expansion of the system.
作者
赵俊
吴宝锋
徐盛果
孙小菡
Zhao Jun;Wu Baofeng;Xu Shengguo;Sun Xiaohan(Southeast University,Nanjing 210096,China;Nanjing Sunlight Information Technology Research Institute Co.,Ltd.,Nanjing 210012,China;Changyuan Shenrui Jibao Automation Co.,Ltd.,Nanjing 210000,China)
出处
《航空科学技术》
2021年第7期73-78,共6页
Aeronautical Science & Technology
基金
航空科学基金(2019ZH069003)。
关键词
智能制造
边缘计算
光分组交换
稳定性
时延
intelligent manufacturing
edge computing
optical packet switching
stability
latency
