Quality of Service Guaranteed Resource Management Dynamically in Software Defined Network

摘要

Quality of Service (QoS) is the idea that transmission rates, error rates, and other characteristics can be measured, improved, and, to some extent, guaranteed in advance. It is difficult to guarantee the performance requirements for various services with current Internet. Therefore, meeting ever-growing QoS requirements for those services is an urgently resolved problem. In this paper, we design a novel QoS-enabled management framework to create an end-to-end communication service over software defined networking (SDN). This framework classifies flow into different level and allocates network resource dynamically to ensure the request of services. The High priority flow will be rerouted by route optimization algorithm when the original path can't provide available bandwidth. Once there is no feasible path for high priority flow, this framework will enable queue mechanism to guarantee the transmission of QoS flow. We present the simulation experiment to validate the performance of our framework. Furthermore, we deploy this framework into our physical testbed to proof the feasibility and expandability. Experiment results have shown that an effectively improve on QoS can be achieved for various services using our framework.