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Systèmes contrôlés en réseau : évaluation de performances d'architectures Ethernet commutées

Abstract : In the field of networked control systems, researches have considerably evolved since Ethernet is more and more used to substitute the traditional industrial local area networks. Even if this choice of Ethernet is justified regarding its intrinsic ability to support all the communications of the enterprise (from office to workshop), it is not suitable to assume the time constraints of distributed control applications. Contrary to the fieldbuses, the non-determinism of the medium access method used by Ethernet does not enable to guarantee strict time constraints. The contribution of this thesis is to define an analytical approach to upper-bound the end-to-end delays in networked control systems which are based on switched Ethernet architectures. Work has focused on the adaptation of the network calculus theory to these specifics environments. Within this framework, this thesis presents the modeling of an IEEE 802.1D switch as well as a computation method of the end-to-end delays based on the increasing of the traffic burstiness. Several real experiments validate the tightness of the computed bounds. In addition to the performance evaluation, the work has also considered the Classification of Service (IEEE 802.1D/p) and the optimization of the frames scheduling on Ethernet. Finally, this thesis shows how such a performances evaluation method can be used to scale and optimize the design of switched Ethernet architectures.
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Submitted on : Thursday, March 29, 2018 - 11:06:04 AM
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  • HAL Id : tel-01747614, version 1



Jean-Philippe Georges. Systèmes contrôlés en réseau : évaluation de performances d'architectures Ethernet commutées. Autre [cs.OH]. Université Henri Poincaré - Nancy 1, 2005. Français. ⟨NNT : 2005NAN10145⟩. ⟨tel-01747614⟩



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