A Review of Routing Optimization Techniques for Quality of Service Assurance in Software-Defined Networks

The traditional military communication network is based on IP architecture, which has the problems of rigid architecture and challenging quality of service guarantee. The rapid development of various new applications has put differentiated demands on the whole network's service quality. In recent years, software-defined network technology has been developing, which has the characteristics of decoupling the control and data planes. Its control plane has excellent global control capability and network equipment information collection capability, which has natural advantages for optimizing the quality of service. Firstly, the SDN network architecture, quality of service performance parameters, and service model are introduced; secondly, the different requirements of quality of service for standard and typical service application scenarios are analyzed, and the current research status of quality of service enhancement through routing optimization is described; finally, the outlook is summarized, and two new ideas for quality of service enhancement in SDN networks and the development trend of quality of service research in military communication networks are proposed.