Service Forwarding Method of Aerospace Information Network Based on Software Defined Networking

Abstract

The invention proposes a service forwarding method of an aerospace information network based on a software-defined network. According to different types of aerospace information network services that have different service quality requirements in terms of bandwidth, delay, and packet loss rate, the idea of ​​software-defined networking is introduced, and centralized control is adopted to realize the separation of control plane and data plane. A tunnel control mechanism based on business type is built in the core network of SkyInformation Network Topology. Multiple tunnels calculate different types of business traffic paths according to the reserved bandwidth, priority and tunnel business type. According to the tuple matching information of the uploaded packet flow transmitted by the southbound interface, it is judged that the service is forwarded based on packets or labels. According to the data plane node flow status feedback information, when the network resources are insufficient, the label path is replanned according to the priority. The forwarding mechanism designed by the present invention has flexibility and globality, and can efficiently realize the service delivery of the aerospace information network.

Description

Technical field [0001] The invention belongs to the technical field of information networks, and specifically relates to a software-defined network-based aerospace information network service forwarding method. Background technique [0002] Glossary: [0003] GEO satellite: Geostationary Orbit (circular orbit) [0004] MEO satellite: Middle Earth Orbit [0005] LEO satellite: Low Earth Orbit [0006] PBTSP module: Combining network topology type topology information, according to the initial customized tunnel information, using the shortest path Dijkstra algorithm to calculate the label path that meets the bandwidth and priority of the business. [0007] Dijkstra algorithm: Dijkstra algorithm refers to the shortest path algorithm from one vertex to the rest of the vertices, which solves the shortest path problem in a directed graph. [0008] The aerospace information network takes various types of space platforms as the carrier, through the integration of multi-system systems, is the cor...

AI Technical Summary

Problems solved by technology

[0012] Like the terrestrial network, IP-based next-generation satellite networks also have many shortcomings, such as slow convergence speed of distributed routing algorithms, lack of global vision, complex network configuration, inability to perform flexible configuration updates and provide fine-grained network management services

In addition, the characteristics of the satellite network also bring more challenges to network performance. For example, the dynamic topology of the network makes the routing algorithm more unstable, and the long satellite-ground distance and the data interaction method of satellite overhead transmission make the global network routing Updates take longer

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