Are current resources in SDN allocated to maximum performance and minimize costs and maintaining QoS problems?

In order to maintain application specific Quality of Service (QoS) requirements, the number of resources used in network directly impacts the capital (CAPEX) and operational expenditure (OPEX). Therefore, it is vital to investigate feasible strategies to maintain QoS and minimizing resources provisioning cost. In this paper, we propose a solution in a hierarchical Software-defined network (SDN) architecture that provides flow-balancing (with guaranteed QoS) in proactive operations of SDN controllers, and attempts to optimize the use of instance resources provisioning costs to the controller. Furthermore, in order to validate our findings, we showed results from performance evaluations using appropriate analytical model. We believe that our solution will helps to set-up a network with minimum resources and affordable cost with guaranteed application QoS.

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