Uncertain metrics applied to QoS multipath routing

Morawski, Michał

doi:10.1109/drcn.2005.1563891

Cited by 4 publications

(7 citation statements)

References 22 publications

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“…Unfortunately the information about delays is always outdated and former approaches exploiting this rule have been failed (Khanna & Zinky, 1989). Here we shortly discuss another approach developed recently by Morawski (Morawski, 2005;Morawski, 2006b;Morawski, 2007). His approach is based on the method of suitable utilisation of multiple communication channels that dissipates congestions (originated by media access procedure, noise, retransmissions, foreign flows interference, etc.)…”

Section: Network Layer Compensationmentioning

confidence: 99%

“…These phenomena are exceptionally important for wireless media, but the problem exists in any shared media. This problem can be diminished in network layer using multiple transmission channels and suitable traffic engineering mechanisms (Morawski, 2005), where link costs (delays) are considered as uncertain numbers. From the above discussion follows that selection of the sampling period in network based control systems requires additional analysis as compared with that performed (Åström & Wittenmark, 1997;Wang & Liu 2008) in the case of classical computer controlled systems.…”

Section: Network Introduced Delaysmentioning

confidence: 99%

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Robustness Enhancement of Networked Control Systems

Morawski¹,

Zajaczkowski²

2010

Factory Automation

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Section: Network Layer Compensationmentioning

confidence: 99%

Section: Network Introduced Delaysmentioning

confidence: 99%

Robustness Enhancement of Networked Control Systems

Morawski¹,

Zajaczkowski²

2010

Factory Automation

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“…In the papers by Morawski (2005;2006b;2007a;2007b) the methods of adaptive tuning of the proper values of α and β are described. Our strategy significantly decreases the probability of burst delay or losses and the susceptibility on congestion, noise, interferences, etc.…”

Section: Network Layer Compensationmentioning

confidence: 99%

“…The problem can be diminished using multiple transmission channels and suitable traffic engineering mechanisms (Morawski, 2005), where link costs (delays) are considered uncertain numbers. From the above discussion it follows that the selection of the sampling period in network based control systems requires additional analysis compared with that performed (Åström and Wittenmark, 1997;Wang and Liu, 2008) in the case of classical computer controlled systems.…”

Section: Network Introduced Delaysmentioning

confidence: 99%

“…Hence, in our NCS, we implemented a remote controller designed using the first of the two aforementioned methods. The predictive controller implemented in the application layer was complemented by traffic engineering mechanisms developed recently by Morawski (2005;2006b;2007a;2007b) and implemented in the network layer. It is worth adding that our experimental NCS was assembled from standard inexpensive network components typically used for office networking.…”

Section: Introductionmentioning

confidence: 99%

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Approach to the design of robust networked control systems

Morawski¹,

Zajaczkowski²

2010

International Journal of Applied Mathematics and Computer Science

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The paper describes the application of the traffic engineering framework together with application layer procedures as mechanisms for the reduction of network latency lags. These mechanisms allow using standard and inexpensive hardware and software technologies typically applied for office networking as a means of realising networked control systems (NCSs) with high dynamic control plants, where a high dynamic control plant is the one that requires the sampling period several times shorter than communication lags induced by a network. The general discussion is illustrated by experimental results obtained in a laboratory NCS with the magnetic levitation system (MLS), which is an example of a structurally unstable plant of high dynamics.

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Network based controller applied to a highly dynamic system

Morawski

Zajaczkowski

2008

2008 IEEE International Conference on Emerging Technologies and Factory Automation

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The paper deals with the design of the real-time networked control system (NCS) for the experimental magnetic levitation system (MLS) which is an example of the highly dynamic and structurally unstable controlled plant. The experimental system under consideration consists of the plant (MLS) equipped with sensor, actuator and a local computer responsible mainly for communication with a remote controller computing values of control feedback and connected with the local computer by a computer network. The design of this NCS is performed using the predictive control approach which is relatively simple for implementation and well suited for systems with variable transmission delays, even several times longer then the sampling period used for discretization of the plant model. In this paper we assume that, the network is a general purpose network without fixed or even constrained latencies.

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Uncertain metrics applied to QoS multipath routing

Cited by 4 publications

References 22 publications

Robustness Enhancement of Networked Control Systems

Robustness Enhancement of Networked Control Systems

Approach to the design of robust networked control systems

Network based controller applied to a highly dynamic system

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