关键词: 一体化融合网络, 软件定义网络, 路由调度, 路径成本, 多路径路由

Abstract: In recent years, the Internet of Everything has developed rapidly, and a large number of network protocols and types that meet different needs have emerged. In the scenario of integrated network requirements, the network integrating different types and protocols has problems such as unstable communication, unbalanced data traffic load, and poor robustness. Software Defined Networking (SDN), as a new type of network paradigm, provides a convenient way to solve these problems. Combined with SDN analysis and research, the dynamic mechanism is used to solve the routing and scheduling problem of the integrated convergent network. First, the link information is divided into 8 combinations of hop count, delay, bandwidth, and packet loss rate. Different networks select different combination costs according to their characteristics, and monitor and calculate network information through real-time traffic modules. Secondly, the accurate cost model based on subjective and objective is optimized. Based on the subjective weighting method G1 method, the index threshold type G1 method is proposed and then the multiplicative integration is used for weighted combination to give the final link cost. At the same time, an integrated multi-path selection algorithm for converged networks is designed, and the optimized cost combination is applied to the multi-path Dijkstra variant algorithm to obtain the transmission link and the combined cost. According to the routing strategy, the multi-path that meets its own characteristics is selected for different networks and proportionally forward. The routing and scheduling mechanism in SDN is simulated through the Ryu controller and Mininet platform. The results show that, through the dynamic and multi-dimensional full-time air conditioning mechanism, the multi-path characteristics of the integrated converged network are fully explored, and the differentiated path selection and flow scheduling of the integrated converged network in a dynamic environment are realized, and the delay and bandwidth utilization Obvious results have been achieved on multiple indicators such as transmission rate, jitter, and packet loss rate.

Key words: Integrated network, Software Defined Networking, Routing scheduling, Path cost, Multipath routing