基于DSPN的5G工业控制系统业务可用性分析

doi:10.12305/j.issn.1001-506X.2023.08.39

摘要/Abstract

摘要：

5G工业控制系统规模化应用的关键是保障其高可用性。若通过试验评估，其成本高昂且困难诸多。而已有的可用性建模方法很少考虑到5G对可用性的影响。对此，以一个实际的5G转钢系统为例，采用确定性随机Petri网(deterministic stochastic Petri net, DSPN)从业务流程的角度对5G技术改造后的工控系统的动态故障和维修过程进行形式化建模，评估不同的失效模式对系统业务可用性的影响。在案例中分析了5G工业控制系统中不同参数对系统业务可用性造成的影响，发现无线链路平均故障间隔时间(mean time between failures, MTBF)对系统业务可用性影响最大。实验结果表明，所提方法可用于评估5G工业控制系统的业务可用性，为系统设计人员提供参考。

关键词: 业务可用性, 5G, 转钢业务, 确定性随机Petri网

Abstract:

The key to the large-scale application of 5G industrial control systems is to ensure its high availability. However, through experimental evaluation, the cost is high and there are many difficulties. Existing availability modeling methods rarely consider the impact of 5G on availability. Taking an actual 5G rotating steel system as an example, a deterministic stochastic Petri net (DSPN) is used to formalize the dynamic faults and maintenance process of the industrial control system after 5G technology transformation from a business process perspective, and to evaluate the impact of different failure models on the system's application availability. In the case study, the impact of different parameters on system application availability in the 5G industrial control system is analyzed, and it is found that the mean time between failures (MTBF) of wireless links has the greatest impact on system application availability. The experiment results indicate that the proposed method can be used to evaluate the application availability of 5G industrial control systems, providing reference for system designers.

Key words: application availability, 5G, rotating steel, deterministic stochastic Petri net (DSPN)

中图分类号:

TN081

杨启航, 易志为, 黄宁. 基于DSPN的5G工业控制系统业务可用性分析[J]. 系统工程与电子技术, 2023, 45(8): 2634-2642.

Qihang YANG, Zhiwei YI, Ning HUANG. DSPN-based application availability analysis for 5G industrial control systems[J]. Systems Engineering and Electronics, 2023, 45(8): 2634-2642.

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组件类型	MTBF/h	MTTR/h
传感器	28 011	5
5G摄像头	30 000	8
PLC	131 400	100
边缘网关	44 957	8
gNB	120 000	10
服务器硬件	8 760	1
操作系统	1 440	1
虚拟机	2 800	0.17
边缘服务	6 865.3	0.167

服务	感知	边缘网关	无线通信	边缘服务
可用性场景1	0.999 866 7	0.999 660 0	0.976 824 0	0.994 856 1

参数	敏感度指数
无线链路 MTBF	4.51×10^-3
PLC MTBF	0.34×10^-3
操作系统 MTBF	0.31×10^-3
gNB MTBF	3.75×10^-5
虚拟机 MTBF	2.73×10^-3
边缘服务 MTBF	1.09×10^-5

服务		感知	网关	无线通信	边缘服务
可用性	场景1	0.999 866 7	0.999 660 0	0.976 824 0	0.994 856 1
可用性	场景2	0.999 371 8	0.999 822 1	0.999 845 8	0.996 577 5

场景	场景1	场景2
业务可用性	0.971 339 4	0.995 620 7