Allocation dynamique des ressources et gestion de la qualité de service dans la virtualisation des réseaux

摘要

Internet has been successful in the recent years. The critical infrastructure of the internethas become stagnant due to the absence of changes in the core networks and stiffness of deployedequipment. It has become difficult and expensive to deploy new network services. Network virtualizationis a new paradigm to overcome this problem.In this thesis, we present network virtualization and Software Defined Networking (SDN) asa solution that can be used by service providers. It enables them to provide new services tousers through virtual networks (VNs) with better quality of service while optimizing the use ofphysical network resources.Firstly, we demonstrate the potential of SDN in the QoS management of a virtualized homenetwork (VN). We propose and implement ”FlowQoS”, a mechanism that can be deployed byan Internet Service Provider in the last-mile hop or in the home gateway. Performance measurementsshow that this solution can share bandwidth between applications according to userdefinedconfiguration to guarantee QoS for each active traffic.The second contribution is modeling the interaction between service providers and infrastructureproviders using game theoretic framework to offer dynamic sharing of physical infrastructureacross multiple VN with different QoS requirements. We present a set of non-cooperative gamesto model the negotiation phase and the dynamic allocation of nodes and physical links for eachdeployed VN.Finally we focus on a predictive approach that allows an adaptive control of bandwidth allocationin order to reduce the packet delays for a given VN on each physical link.The last two contributions offer dynamic sharing models of physical infrastructure resourceswhile guaranteeing the QoS for each VN.