Optimization of Bandwidth Utilization in Data Center Network with SDN

Data-center network (DCN) plays a fundamental role in cloud computing. As applications grow fastly, capacity utilization of data-center network becomes a big challenge to cloud service, especially when user's requests are unbalanced or data-center works at a peak time when there are amount of demands need to be handled. Software-defined Networking (SDN) is an efficient technology to manage network utilization. In this paper, we apply SDN controller for service routing to increase bandwidth utilization of DCN and meanwhile reduce delay of end-users, by proposing a heuristic algorithm for SDN. Numerical experiments demonstrate the good performance of the proposed algorithm.