Abstract
In recent years, the prevalence of mobile devices has brought about tremendous growth in the volume of video traffic in the Internet. Faced with the burst of Internet traffic, how to utilize the network resources to guarantee quality of service (QoS) of video traffic so as to enhance user experience without adding additional expenditure becomes an urgent issue to the service providers. Most existing studies on providing quality of service (QoS) guarantee mainly focus on intra-domain QoS. However, inter-domain QoS setup along the delivery path is critical to a typical video service. In this thesis, we present the design of an inter-domain signaling video streaming framework in the SDN networks. In the framework, SDN controllers are tasked with handling a proposed QoS-BGP protocol. We use SDN controllers to gather network resources in their domains, and put QoS information such as available bandwidth into QoS-BGP messages. With the QoS-BGP protocol, our inter-domain routing path selection algorithm takes the QoS information into account. In addition, we design a novel SDN signaling protocol for an SDN controller to communicate with other controllers and servers. Our framework exploits the signaling protocol to exchange signaling messages, and carry out QoS negotiation and setup. Our simulation results show that the proposed QoS-BGP has similar convergence time and the number of BGP messages exchanged, but accepts around three times more QoS requests compared to the standard BGP.