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

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 Local Area Network (WLAN) with a collision-free CSMA MAC protocol called CANlike protocol (adaptation of the MAC protocol of the CAN bus to the wireless context). The co-design approach is based on links 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 WLAN. We present, first, the implementation of the relation QoS→QoC on the base of the delay compensation method called dominant pole method, and second, the implementation of the relation QoC→QoS on the base of the hybrid priorities for the frame scheduling. Finally, we show the interest of the relation QoS⇋QoC i.e. the joint action of the delay compensation and the role of the hybrid priority in order to have a more efficient WNCS 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 (WNCSs). 2012. ⟨hal-00668746v1⟩