Journal ArticleDOI
Implementation of a bandwidth allocation scheme in a token-passing fieldbus network
Seung Ho Hong,Yu Chul Kim +1 more
TLDR
The results obtained from the experimental model show that the proposed scheme restricts the delay of both periodic and time-critical data to a pre-specified bound, and the proposed bandwidth allocation scheme also fully utilized the bandwidth resource of the network system.Abstract:
This paper presents a method for implementing a bandwidth allocation scheme on Profibus that operates on a token-passing discipline basis. In order to implement the bandwidth allocation scheme, this study incorporates the following additional functions to the fieldbus datalink layer (FDL) protocol of Profibus. First, the medium bandwidth of the network system is separated into both periodic and time-available intervals, and, second, node timers are synchronized over a local link. The validity of this bandwidth allocation scheme is determined using an experimental model of a network system. The results obtained from the experimental model show that the proposed scheme restricts the delay of both periodic and time-critical data to a pre-specified bound. The proposed bandwidth allocation scheme also fully utilized the bandwidth resource of the network system.read more
Citations
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Journal ArticleDOI
QoS-based remote control of networked control systems via Profibus token passing protocol
TL;DR: An algorithm for selection of target rotation time using a genetic algorithm to ensure QoS of control information is presented here and the performance of the QoS-based remote control scheme under conditions of controlled network delay is discussed.
Journal ArticleDOI
An Approach to Constructing Web Service Workflow Based on Business Spanning Graph
TL;DR: Experimental results demonstrate that the constructing model could effectively shield the physical varieties and differences of Web service, and preferably combine the Web service resource in the Internet.
Proceedings ArticleDOI
Optimal Bandwidth Allocation and QoS-Adaptive Control Co-Design for Networked Control Systems
Kun Ji,Won-jong Kim +1 more
TL;DR: Simulation results show that this co-design approach significantly improves overall control performance and utilizes less bandwidth compared to static strategies.
Journal ArticleDOI
Experimental evaluation of a bandwidth allocation scheme for foundation fieldbus
Seung Ho Hong,In-Ho Choi +1 more
TL;DR: A network design for the foundation fieldbus protocol using a bandwidth allocation scheme that restricted the delay of both periodic and time-critical data to a pre-specified bound and fully utilized the bandwidth resources of the network system.
Journal ArticleDOI
Brief Paper: Intelligent scheduling and optimisation for resource-constrained networks
TL;DR: Two intelligent and optimal scheduling strategies are employed by a bandwidth scheduler according to corresponding dynamic resource allocation approach to improve overall control performance in comparison with the fixed bandwidth allocation and optimal bandwidth allocation in the literatures.
References
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Book
Deadline Scheduling for Real-Time Systems: EDF and Related Algorithms
TL;DR: In this paper, the authors present the algorithms and associated analysis, but guidelines, rules, and implementation considerations are also discussed, especially for the more complicated situations where mathematical analysis is difficult, adding to the complexity is the fact that a variety of algorithms have been designed for different combinations of these considerations.
Journal ArticleDOI
Scheduling algorithm of data sampling times in the integrated communication and control systems
TL;DR: A scheduling algorithm of determining data sampling times is developed using the window concept, where the sampled data from the control components in the ICCS share a limited number of windows, so that the performance requirement of each control loop is satisfied as well as the utilization of network resources is considerably increased.
Journal ArticleDOI
Bandwidth allocation scheme in CAN protocol
Seung Ho Hong,W.-H. Kim +1 more
TL;DR: The bandwidth allocation algorithm introduced in the paper not only satisfies the performance requirement of real-time application systems interconnected into the CAN but also fully utilises the bandwidth of the CAN.
Book
Computer systems for automation and control
Gustaf Olsson,Gianguido Piani +1 more
TL;DR: Typical process computer problems systems physical process input and output signal processing bus sytems operating systems and real time programming sequential control digital feedback control digital communication man-machine communication system integration.