Admission Control Algorithm for Network Slicing Management in SDN-NFV Environment

Future networks have to be flexible to satisfy requirements of 5G use cases. Software Defined Networking (SDN), Network Function virtualization (NFV) and Network Slicing technologies have proved to be promising paradigms for new services provisioning. In our work, we propose a new mechanism for the admission control of new users' requests. To this aim, we propose a network orchestrator module which receives new users' requests and then determines if their demands can be served by an existing slice on not. The major aim of our algorithm is the selection of the best target slice for the user request based on several network criteria such as the network resources latency, availability and reliability as well as their computational performances. Thus, according to the proposed algorithm, users' requests will be mapped into the slice that corresponds perfectly to the request. A mathematical formulation of our proposed algorithm and a performance evaluation are presented. We demonstrate that by providing the ideal slice for users' requests, the quality of service afforded to the users will be enhanced.