Software Defined Networking for HTTP video quality optimization

In this paper, the scheme to improve HTTP video quality using Software Defined Networking (SDN) is explored. First, by analyzing the characteristics of current HTTP video and the defects of the widely used Content Delivery Network (CDN), a HTTP video content delivery scheme is proposed in SDN network. Then, the authors build SDN experimental platform, and present five experiments to measure video quality in the presence of different round-trip delay according to round-trip delay test results of HTTP video access in both SDN and actual network environment (including CDN). Finally, the user QOE of the video measured in each experiment is calculated and compared. For all experimental results examined, SDN scheme yields a substantial improvement in HTTP video quality and user QOE, and achieves more than Good level of video quality and MOS>4 user QOE even in poor network environment with high pocket loss rate.