Performance Enhancement of Limited-Bandwidth Industrial Control Systems

2013 ◽  
Vol 739 ◽  
pp. 608-615 ◽  
Author(s):  
Basem Al-Madani ◽  
Anas Al-Roubaiey ◽  
Mohammad F. Al-Hammouri
Keyword(s):  
Real Time ◽  
Manufacturing Systems ◽  
Performance Enhancement ◽  
Industrial Control ◽  
Industrial Control Systems ◽  
Limited Bandwidth ◽  
Network Bandwidth ◽  
Overall Performance ◽  
Data Distribution Service ◽  
The Cost

Due to its portability, reliability, flexibility, real time and rich set of QoS support, Data Distribution Service (DDs) middleware became one of the best solutions for real time distributed manufacturing systems. Most of these systems are composed of heterogeneous networked devices where network bandwidth represents a very important resource. Those devices include limited-resources devices, such as sensors, actuators and controllers. Thus, controlling such resource will significantly enhance the overall performance of the network in terms of resource utilization, delay, and throughput; moreover, it reduces the cost of using leased network bandwidth by limiting the amount of bandwidth as much as needed. In this paper we propose a solution for controlling the limited-bandwidth networked manufacturing systems by using DDS; and we describe the DDS QoS polices that support manufacturing systems to control network bandwidth. Furthermore, we evaluate DDS middleware performance over Bluetooth channel by measuring latency, throughput and jitter; and examining different QoS parameters to show their effect on improving the existing limited-bandwidth networks.

Enhancing Safety in Manufacturing Systems by Integrating Diagnostic Information

2008 ◽  
Author(s):  
Kyle Schroeder ◽  
Aftab A. Khan ◽  
James Moyne ◽  
Dawn Tilbury
Keyword(s):  
Manufacturing Systems ◽  
Diagnostic System ◽  
Process Variable ◽  
Safety System ◽  
Industrial Control ◽  
Industrial Control Systems ◽  
System A ◽  
The Individual ◽  
Diagnostics System

Integrating traditionally separate industrial control systems can derive factory-wide benefits by leveraging more information about the ongoing process. This paper shows that connecting a networked safety system and a process control system leads to an extension of the individual benefits provided by each system. A safety system gains the ability to protect not only the machines and workers but also the product that is being built. A diagnostic system can also raise safety alarms when a process variable is outside the expected range of safe operation. This connection is explored to determine the practical impact of different methods of integration on machining and system processes. Three integration methods are possible depending on which portions of the system can be classified as “safe”. A case study integrating a diagnostics system as a non-safe sensor proves that this connection, when it is implemented on an industrial testbed, provides all of the benefits described and does not require significant changes to control software.

scholarly journals Sensitivity Analysis for Vulnerability Mitigation in Hybrid Networks

Electronics ◽  
2022 ◽  
Vol 11 (2) ◽  
pp. 238
Author(s):  
Attiq Ur-Rehman ◽  
Iqbal Gondal ◽  
Joarder Kamruzzaman ◽  
Alireza Jolfaei
Keyword(s):  
Mitigation Strategies ◽  
Hybrid Networks ◽  
Industrial Control ◽  
Industrial Control Systems ◽  
It Systems ◽  
Wide Range ◽  
Assessment Techniques ◽  
Threat Strategies ◽  
Iot Devices ◽  
The Cost

The development of cyber-assured systems is a challenging task, particularly due to the cost and complexities associated with the modern hybrid networks architectures, as well as the recent advancements in cloud computing. For this reason, the early detection of vulnerabilities and threat strategies are vital for minimising the risks for enterprise networks configured with a variety of node types, which are called hybrid networks. Existing vulnerability assessment techniques are unable to exhaustively analyse all vulnerabilities in modern dynamic IT networks, which utilise a wide range of IoT and industrial control devices (ICS). This could lead to having a less optimal risk evaluation. In this paper, we present a novel framework to analyse the mitigation strategies for a variety of nodes, including traditional IT systems and their dependability on IoT devices, as well as industrial control systems. The framework adopts avoid, reduce, and manage as its core principles in characterising mitigation strategies. Our results confirmed the effectiveness of our mitigation strategy framework, which took node types, their criticality, and the network topology into account. Our results showed that our proposed framework was highly effective at reducing the risks in dynamic and resource constraint environments, in contrast to the existing techniques in the literature.

The State of the Art of Software Defined Networking (SDN)

2018 ◽  
Vol 10 (4) ◽  
pp. 44-60 ◽  
Author(s):  
Emilia Rosa Jimson ◽  
Kashif Nisar ◽  
Mohd Hanafi Ahmad Hijazi
Keyword(s):  
Real Time ◽  
Network Architecture ◽  
Software Defined Networking ◽  
Centralized Control ◽  
Network Resources ◽  
Limited Bandwidth ◽  
Network Bandwidth ◽  
Real Time Traffic ◽  
Complex Design ◽  
Proposed Model

The complex design of the current network architecture, which has inevitably resulted in poor network resources management, has triggered researchers to propose a Software Defined Networking (SDN)-based network model to simplify the management of the limited bandwidth of a network. The key idea of the SDN-based model is to simplify network management by introducing a centralized control through which the dynamic update of forwarding rules, the simplification of network devices tasks, and flow abstractions can be realized. This proposed model utilizes the limited network bandwidth systematically by giving real-time traffic higher priority than non-real-time traffic to access limited resources. The experimental results showed that the proposed model helped ensure real-time traffic would be given greater priority to access the limited bandwidth, where the major portion of the limited bandwidth was allocated to the real-time traffic.

scholarly journals Safe and Policy Oriented Secure Android-Based Industrial Embedded Control System

2020 ◽  
Vol 10 (8) ◽  
pp. 2796 ◽  
Author(s):  
Raimarius Delgado ◽  
Jaeho Park ◽  
Cheonho Lee ◽  
Byoung Wook Choi
Keyword(s):  
Control System ◽  
Embedded System ◽  
Real Time ◽  
Industrial Control ◽  
Embedded Control ◽  
Industrial Control Systems ◽  
Industrial Systems ◽  
Safety And Reliability ◽  
Time Requirements ◽  
Copy Protection

Android is gaining popularity as the operating system of embedded systems and recent demands of its application on industrial control are steadily increasing. However, its feasibility is still in question due to two major drawbacks: safety and security. In particular, ensuring the safe operation of industrial control systems requires the system to be governed by stringent temporal constraints and should satisfy real-time requirements. In this sense, we explore the real-time characteristics of Xenomai to guarantee strict temporal deadlines, and provide a viable method integrating Android processes to real-time tasks. Security is another issue that affects safety due to the increased connectivity in industrial systems provoking a higher risk of cyber and hardware attacks. Herein, we adopted a hardware copy protection chip and enforced administrative security policies in the booting process and the Android application layer. These policies ensure that the developed system is protected from physical tampering and unwanted Android applications. The articulacy of the administrative policies is demonstrated through experiments. The developed embedded system is connected to an industrial EtherCAT motion device network exhibiting operability on an actual industrial application. Real-time performance was evaluated in terms of schedulability and responsiveness, which are critical in determining the safety and reliability of the control system.

A Fast Real-Time Scheduling Algorithm for WIA-PA

2014 ◽  
Vol 519-520 ◽  
pp. 124-127 ◽  
Author(s):  
Xi Jin ◽  
Peng Zeng
Keyword(s):  
Real Time ◽  
Mesh Networks ◽  
Scheduling Algorithm ◽  
Distributed Network ◽  
Performance Limits ◽  
Industrial Control ◽  
Industrial Control Systems ◽  
Real Time Scheduling ◽  
Time Scheduling ◽  
Industrial Monitoring

WIA-PA networks have been widely used in industrial monitoring systems, but its real-time performance limits its usage in industrial control systems. And no existing works on real-time scheduling have taken into account all features of WIA-PA. So, in this paper, we propose an algorithm to schedule transmissions under real-time constraints for WIA-PA star-mesh networks. The algorithm is based on hybrid centralized and distributed network management, so it can quickly determine how to schedule transmissions. Experimental results show that our algorithm is fast and efficient.

scholarly journals Towards Real-Time Assessment of Industrial Control Systems (ICSs): A Framework for Future Research

2013 ◽  
Author(s):  
William P. Knowles ◽  
Daniel E Prince ◽  
David Hutchison ◽  
Jules Ferdinand Pagna Disso ◽  
Kevin Jones
Keyword(s):  
Control Systems ◽  
Real Time ◽  
Future Research ◽  
Industrial Control ◽  
Industrial Control Systems ◽  
Time Assessment
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