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

George Nikolakopoulos, Athanasia Panousopoulou, Antonios Tzes

Research output: Contribution to journalArticle


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, which monitors the QoS-factor, and (a) adjusts the data retransmission 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.

Original languageEnglish (US)
Pages (from-to)333-346
Number of pages14
JournalControl Engineering Practice
Issue number3
Publication statusPublished - Mar 1 2008



  • 802.11b protocol
  • Gain scheduling
  • Networked controlled systems
  • QoS

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Industrial and Manufacturing Engineering

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