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Experimental controller tuning and QoS optimization of a wireless transmission scheme for real-time remote control applications

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3 Author(s)
Panousopoulou, A. ; Electr. & Comput. Eng. Dept., Patras Univ., Greece ; Nikolapoulos, G. ; Tzes, A.

In this paper an experimental optimization of a wireless (802.11b) transmission scheme, coupled to the tuning process of the controller parameters, for real-time control applications is presented. In congested wireless networked controlled systems (WNCS), there is considerable loss of data-packets in the transmission process between the client and server-sides. Accordingly the quality of service (QoS) suffers and the system's performance deteriorates. An integrated framework is proposed, that monitors the QoS-factor and: a) adjusts the data re-transmission attempts, and b) periodically tunes the controller's parameters. Experimental studies on a WNCS-prototype are used for the optimization procedure. These studies indicate the need for a compromise between the achieved QoS, the network's throughput, and the selected sampling period.

Published in:

Industrial Technology, 2004. IEEE ICIT '04. 2004 IEEE International Conference on  (Volume:2 )

Date of Conference:

8-10 Dec. 2004