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Simulation hybride des réseaux IP-DiffServ-MPLS multi-services sur environnement d'exécution distribuée

Abstract : Technology used for telecommunication packet-switched networks is in constant evolution. Current trends are directed towards mutualisation of voice and data services and of their infrastructures and technologies (IP/MPLS networks and QoS in Internet). Analytic modelling and event-driven simulations are the common ways to evaluate performance of these networks. But event-driven simulations require huge processing time whereas models resulting from analytic methods can lack of accuracy. This thesis defines a framework called Distributed Hybrid Simulation, which rigorously combines the differential traffic theory and event driven simulations. In a first technique, network resources are partitioned in domains. Some of them are simulated by events, and the others are modelled by numerically integrated differential equations. The other technique allows propagation of event-driven traffics over networks modelled by differential equations. Thus Hybrid Simulation pushes back the theoretical limits of analytic modelling and allows one to design general performance evaluation models and less time-consuming software. A Hybrid simulator prototype has been developed. One can model Internet Diffserv and MPLS routers, TCP protocols and various multimedia traffic sources (Audio, Video). To even more reduce processing time, the simulator can be parallelized. So a new communication kernel has been designed for the LANDA environment. It proposes a MPI software library that allows a latency-efficient and bandwidth-efficient use of several communication interfaces and SMP shared memory.
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Submitted on : Friday, November 18, 2005 - 10:52:52 AM
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  • HAL Id : tel-00011034, version 1


David Gauchard. Simulation hybride des réseaux IP-DiffServ-MPLS multi-services sur environnement d'exécution distribuée. Automatique / Robotique. Université Paul Sabatier - Toulouse III, 2003. Français. ⟨tel-00011034⟩



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