Date depot: 10 avril 2020 Titre: New Generation of Software defined Networking for Green Hybrid Cloud/Fog Systems Directrice de thèse: Maria TROCAN (LISITE) Encadrante : Shohreh AHVAR (LISITE) Domaine scientifique: Sciences et technologies de l'information et de la communication Thématique CNRS : Non defini Resumé: Nowadays there is an explosive increase in the number of end-users and requested resources (e.g., as computing, networks, storage, software). Cloud computing provides quick on-demand network access to a shared pool of scalable and cost-efficient resources . The physical distance between a cloud service provider’s data centers (e.g., Amazon ) and end devices is a limitation of cloud computing. This distance could cause delays, which may not be compatible with the requirements of latency-sensitive applications, such as Public Protection and Disaster Relief (PPDR), healthcare, and autonomous driving applications. Fog systems help cloud computing to provide a lower latency by extending the architecture to the edge of the network and allocating some parts of computations to the edge statiend-to-end /mobile nodes/data centers . In such extended architecture, hybrid cloud/fog systems, network scale, topology and configuration are highly heterogeneous, dynamic and mission-oriented (e.g., temporary hospitals built during the Covid-19 pandemic). Software Defined Networking (SDN) is a new technology which can adapt the network to the running environment on the fly in a cost efficient manner and can meet the requirements of hybrid cloud/fog systems from various perspectives, including edge network, access network, core network and data center networking (e.g., temporarily boosting edge data centers capacity and handling real time ambulances communications with the information center). In addition, SDN by decoupling the management and control from the data plane allows the control plane to evolve independently, which enables faster innovation since software often exceeds hardware in innovation speed. However, currently SDN standardization in the form of OpenFlow is not scalable, reliable and efficient enough to fully handle all possible scenarios/use cases and managerial operations in hybrid cloud/fog systems. Due to these challenges, organizations and some vendors, who are frustrated by closed architectures are reluctant to adopt SDN.