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Toward Adaptive Control of QoS-Importance Decoupled Real-Time Systems
Linköping University, The Institute of Technology. Linköping University, Department of Computer and Information Science, RTSLAB - Real-Time Systems Laboratory.
Institutionen för datavetenskap Linköpings universitet.
Linköping University, The Institute of Technology. Linköping University, Department of Computer and Information Science, RTSLAB - Real-Time Systems Laboratory.
Linköping University, The Institute of Technology. Linköping University, Department of Electrical Engineering, Automatic Control.
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2007 (English)In: IEEE International Workshop on Feedback Control Implementation and Design in Computing Systems and Networks,2007, 2007Conference paper, Published paper (Refereed)
Abstract [en]

This paper deals with differentiated services in real-time systems. Tasks submitted to a real-time system are differentiated with respect to importance and QoS requirements. We use feedback control to enforce the requirements in QoS and ensure a hierarchical admission policy based on the importance of the tasks. The results show that the requirements are met during steady state when the workload is constant. The feedback control approach does not satisfactorily manage QoS when there is a sudden and significant workload change (transient state) due to the time-variant nature of the system. To address this, we present preliminary and promising results using adaptive control, and report on some challenges we are facing when applying the theory.

Place, publisher, year, edition, pages
2007.
Keyword [en]
real-time system, quality of service, QoS, control theory, system identification, differentiated services
National Category
Computer Science
Identifiers
URN: urn:nbn:se:liu:diva-38143Local ID: 41926OAI: oai:DiVA.org:liu-38143DiVA: diva2:258992
Available from: 2009-10-10 Created: 2009-10-10

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http://www.ida.liu.se/~rtslab/publications/2007/Amirijoo07Toward.pdf

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Amirijoo, MehdiHansson, JörgenGunnarsson, Svante

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Citation style
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Output format
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