面向工业互联网的异构时间敏感数据流协同传输机制设计  

Design of coordinated transmission mechanism of heterogeneous time-sensitive data flow for industrial internet

作　　者：张景龙 陈彩莲[1,2,3] 许齐敏 林美涵 卢宣兆 陈营修 ZHANG JingLong;CHEN CaiLian;Xu QiMin;LIN MeiHan;LU XuanZhao;CHEN YingXiu(Automation Department,Shanghai Jiaotong University,Shanghai 200240,China;Key Laboratory of System Control and Information Processing,Ministry of Education,Shanghai 200240,China;Shanghai Engineering Research Center of Intelligent Industrial Control and Management,Shanghai 200240,China)

机构地区：[1]上海交通大学自动化系,上海200240 [2]系统控制与信息处理教育部重点实验室,上海200240 [3]上海市工业智能管控工程技术研究中心,上海200240

出　　处：《中国科学：技术科学》2022年第1期138-151,共14页Scientia Sinica(Technologica)

基　　金：国家重点研发计划项目(编号:2018YFB1702100);国家杰出青年科学基金项目(批准号:62025305);国家自然科学基金重点项目(批准号:61933009)资助。

摘　　要：工业互联网需要实现IT(information technology)和OT(operation technology)的融合,现场级工业网络的构建是真正实现从OT到IT产线数据无缝接入、从IT到OT实现产线智能运维的关键.对于OT来说,工业系统中的数据具有高度的时间敏感特性,感知数据和控制指令在时间上的确定性传输是实现工业系统可靠稳定运行的基础.然而工业现场仍面临感知数据异构、协议不兼容、传输性能需求不一致等问题,给异构时间敏感数据流的确定性传输带来了巨大的挑战.设计统一的低时延低抖动时间感知门控机制,从而精确地控制数据流的传输行为,是解决这一问题的可行方案之一,这也是时间敏感网络(time-sensitive networking,TSN)标准中的其中一项关键技术.本文主要研究多跳TSN网络中异构时间敏感数据流协同传输问题.首先,将异构时间敏感数据流建模为两大类:周期时间敏感(periodic time-sensitive,PTS)流和非周期时间敏感(sporadic time-sensitive,STS)流.然后,本文分析了PTS流集合的可调度性和门控列表的设计方法,给出了可调度性的充分条件和必要条件,并设计了可调度性判别算法来判定任意决策集合的可调度性.接着,提出了异构时间敏感数据流的协同传输框架,并构建了异构数据调度的约束集合.为实现PTS流最小的端到端确定性时延,并尽可能地降低PTS流调度机制对STS流传输的影响,本文采用无等待时隙调度的设计方法,以最小化调度单元中的最大的时隙占用为优化目标,构建了异构时间敏感数据流调度优化问题.再次,本文设计了均匀排布与填充(uniform arrangement and filling,UAF)算法,通过对相同周期的流进行均匀排布以及填充前序周期调度时产生的空闲时隙,实现调度单元时隙占用最小化.最后,仿真和实验结果验证了两大类异构时间敏感数据流协同传输框架的有效性,以及UAF调度算法在保证同等调度性能基�Industrial internet needs to realize the integration of IT(information technology)and OT(operation technology).The construction of the field-level industrial network is key to truly realizing seamless access of production line data from OT to IT and the intelligent operation and maintenance of the production line from IT to OT.For OT,the data in the industrial system is highly time-sensitive,and the deterministic behavior of perceived data and control instructions in time is the foundation for reliable and stable industrial system operation.However,the industrial field is plagued by problems such as heterogeneous perceived data,incompatible protocols,and varying transmission requirements,which pose significant challenges to the deterministic transmission of heterogeneous timesensitive flow.One feasible solution to this problem is to design a unified time-aware gating mechanism with low delay and jitter,allowing precise control of data flow transmission behavior;this is one of the key technologies in the time-sensitive networking(TSN)standard.This paper mainly studies the coordinated transmission of heterogeneous time-sensitive flow in multi-hop TSN networks.First,heterogeneous time-sensitive traffic is modeled into two categories:periodic time-sensitive(PTS)flow and sporadic time-sensitive(STS)flow.Then,the schedulability of the PTS flow set and the design method of the gate control lists are analyzed,the sufficient and necessary conditions of schedulability are defined,and a schedulability discriminant algorithm is designed to determine the schedulability of any decision set.Then,a coordinated transmission framework of heterogeneous time-sensitive flow is proposed,followed by the construction of the constraint set of heterogeneous data scheduling.This paper employs the design method of no-wait slot scheduling and constructs the heterogeneous time-sensitive flow scheduling problem with the optimization goal of minimizing the maximum slot occupation in the scheduling unit to achieve the minimum end-to-end determin

关 键 词：工业互联网 时间敏感网络 确定性传输 协同传输 无等待时隙调度 

分 类 号：TP393.09[自动化与计算机技术—计算机应用技术]