LAUSR

Software-Defined Satellite Networking (SDSN) has emerged as a new paradigm that offers the programmability required to dynamically manage a satellite network. However, the characteristics of SDSN bring several important issues to be solved in the routing scheme. First, interface protocols of the controller incur nonnegligible overhead, which affects the general traffic. Second, more than one controller is required to ensure the reliability of SDSN, which means that they should cooperate with each other to realize the routing function. Third, how to make full use of the advantage of SDSN’s centralized management for routing algorithm is worth studying. In this paper, we first propose an SDSN architecture to realize flexible centralized management. Based on this architecture, Intelligent Quality of Service (QoS) Routing scheme is proposed and evaluated. Intelligent QoS Routing (IQR) scheme is composed of overhead balancing strategy, controller cooperation strategy, and IQR algorithm. Overhead balancing strategy effectively reduces the impact of overhead on general traffic, which improves the performance of IQR algorithm. Controller cooperation strategy adopts the ensemble Support Vector Regression (SVR) from artificial intelligence tools to enhance the consistency of different controllers’ network views under low frequency situation, which will provide a more accurate reference for IQR algorithm and other management strategies. IQR algorithm takes full advantage of SDSN’s centralized control and rich data to offer fine-grained QoS guarantee intelligently. Simulation results show that IQR scheme achieves better overhead balancing performance, more effective controller cooperation, and better QoS guarantee compared with the existing methods.