Abstract : This thesis is in the field of Networked Controlled Systems, which are multidisciplinary systems and which experience a great development in the context of the current technology and introduce new research problems, particularly for the communities of Automatic Control and Communication Network. The aim is to show the interest in considering a bidirectional link between the Quality of Control (QoC) (stability and performance of process control applications) and Quality of Service (QoS) (delays in the transmissions) and to focus on Local Area Networks and, more particularly, on the scheduling of frames in the MAC layer in which we consider CSMA MAC protocols. Our work first concerns a CAN network where we have three proposals. The first proposal consists of solutions for QoS, for process control applications, which are based on the concept of hybrid priority for the frame scheduling in which we define a dynamic priority part which depends on a QoC parameter. This allows to implement a relation QoC->QoS. The second proposal consists of QoC solutions by using a compensation method for time delays (maintenance of dominant poles) which allows to implement a relation QoS->QoC. The third proposal consists in implementing a relation QoS<=>QoC that ensures, for the implementation of several applications, a fairness property. We then discuss the specific context of Wireless LANs, where, on the one hand, we define collision-free CSMA MAC protocols on the basis of priorities and, on the other hand, we show the feasibility of the ideas developed in the CAN network.