Paper Info
Title
Proactive fault-tolerant wireless mesh networks for mission-critical control systems
Abstract
Although wireless networks are becoming a fundamental infrastructure for various control applications, they are inherently exposed to network faults such as lossy links and node failures in environments such as mining, outdoor monitoring, and chemical process control. In this paper, we propose a proactive fault-tolerant mechanism to protect the wireless network against temporal faults without any explicit network state information for mission-critical control systems. Specifically, the proposed mechanism optimizes the multiple routing paths, link scheduling, and traffic generation rate such that it meets the control stability demands even if it experiences multiple link faults and node faults. The proactive network relies on a constrained optimization problem, where the objective function is the network robustness, and the main constraints are the set of the traffic demand, link, and routing layer requirements. To analyze the robustness, we propose a novel performance metric called stability margin ratio, based on the network performance and the stability boundary. Our numerical and experimental performance evaluation shows that the traffic generation rate and the delay of wireless networks are found as critical as the network reliability to guarantee the stability of control systems. Furthermore, the proposed proactive network provides more robust performance than practical state-of-the-art solutions while maintaining high energy efficiency.
Year
DOI
Venue
2021
10.1016/j.jnca.2021.103082
Journal of Network and Computer Applications
Keywords
DocType
Volume
Proactive mechanism,Fault-tolerant design,Wireless mesh network,Robustness,Mission-critical control system,Constrained optimization
Journal
186
ISSN
Citations 
PageRank 
1084-8045
1
0.36
References 
Authors
0
3
Name
Order
Citations
PageRank
Pan Gun Park128917.42
Hossein S. Ghadikolaei210.36
Fischione Carlo31120101.77