An SDN framework for video conference in inter-domain network

Video conference is the most popular application which is required high quality of service (QoS) such as delay and jitter. Several existing mechanisms for enhancing were proposed in the traditional network not only at the application side as video clients but also at the network core as network routers. Although, these mechanisms can provide a good quality of service, they require a lot of maintenance cost. In addition, the static routing with the shortest-path fashion at the network gateways is not enough to provide a high quality of service for video/audio data transferring due to the affectation of background traffic. Software Defined Network (SDN) is an emerging network architecture that allows a network operator to manage their network environment by programmable centralized control. This not only reduces the cost of maintenance but also increase the performance of networking. In this paper, we proposed an SDN framework for video conference in inter-domain network. The framework used the Packet Pair technique to consider the characteristics of bandwidth and end-to-end delay between two video conference clients. A transferring path and network gateway inside-domain are set up based on this information without a requirement of a routing modification of outside-domains. The evaluation results from Mininet emulator and OF@TEIN testbed show that our framework outperforms the traditional networking significantly in terms of QoS metrics.