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GSI 46, rue Barrault 75634 Paris Cedex 13 FRANCE FRANCE 25, boulevard de l'Amiral Bruk 75782 Paris Cedex 16ARSTRACT The purpose of this paper is to study the general concept of Quality of Service (QOS) and to propose a QOS framework. QOS is commonly viewed as one of the important issues in Broadband Integrated Services Digital Network (B-ISDN). It is a critical factor in this future network that will support a wide variety of services ranging from voice and data to, ultimately, multimedia services. These services will cause tremendous competition among network and service providers. We overview the user's requirements and the concept of QOS, and then propose a framework for QOS. We assume three types of intercommunicating entities in this framework : network provider, service provider, and final service user. The relationship between our QOS framework and the Network Management framework is described.

We are currently witnessing an evolution towards network virtualization and Software Defined Networking (SDN) paradigm. SDN permits the decoupling of the control and data planes of traditional networks, and offers flexible and programmable networks. Besides, the need for dynamic provisioning and composition of networking services leads to the deployment of software components on virtualized network infrastructures. In this paper, we propose a unified management of networking and Information Technology resources and the exposure of management operations to the operator and to third-party service providers. For this sake, we introduce a programmable Controller that offers runtime reconfiguration of components. It exposes different management views according to operator or third-party applications' needs, and simplifies the automation of virtualized networking services. A networking use case is presented to evaluate the advantages of the proposed Controller, where our approach is compared to the control of both Linux Bonding and Click modules. Our Controller overcomes the limitations of virtual network functions management and provisioning approaches at the expense of a slight increase in execution time.

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