On interplays between the Quality of Service and the Quality of Control for a co-design approach in Wireless Networked Control Systems

Xuan Hung Nguyen (1) , Guy Juanole (1)

1 LAAS-SARA - Équipe Services et Architectures pour Réseaux Avancés

We consider the implementation of process control applications on a Wireless LAN with a collision-free CSMA MAC protocol called CANlike (adaptation of the MAC protocol of the CAN bus to the wireless context). The goal of this paper is to show a co-design approach which is based on relations between the Quality of Control (QoC) provided by the controller and the Quality of Service (QoS) provided by the frame scheduling in the MAC layer of the Wireless LAN. We present, first, the relation QoS-->QoC on the basis of a compensation method for time delays called dominant pole method, and second, the relation QoC-->QoS based on the hybrid priorities for the frame scheduling. Finally, we show the interest of the joint action of the delay compensation and the role of the hybrid priority (i.e. relation QoS<-->QoC) in order to have a more efficient Wireless Networked Control System design.

Mots clés: Networked Control System; MAC protocol; Wireless Network; Automatic Control; Co-Design; Quality of Service; Quality of Control; delay compensation

Domaines: Systèmes embarqués

Xuan Hung Nguyen, Guy Juanole. On interplays between the Quality of Service and the Quality of Control for a co-design approach in Wireless Networked Control Systems. 2012. ⟨hal-00668746v3⟩