A high performance media server and QoS routing for SVC streaming based on Software-Defined Networking

Media streaming is the most rapid-growth network service and occupies most of traffics on Internet. This paper presents approaches for enhancing the network performance for media streaming in two aspects. Firstly, in order to improve the network performance of a media server executing on a Virtual Machine (VM), a network framework using Software-Defined Networking (SDN) is introduced. This framework integrates the Kernel-based VM with OpenFlow switch to address the issue of virtualization overhead. The experimental results show that this scheme improves network performance by 68% compared to the conventional structure. Furthermore, for maintaining the quality of Scalable Video Coding (SVC) media streaming during the transmission, a novel routing algorithm based on SDN is illustrated. This algorithm jointly considers bandwidth, delay, and packet loss and automatically deploys routes for different layers in SVC streaming. Comparing to conventional methods, this algorithm reduces the packet loss rate by more than 10% and improves the quality of the received Video sequence.