SDN-Based In-band Network Telemetry for Low-Orbit Satellite Networks

In view of the high dynamics of satellite networks under SDN architecture and the limited on-board resources, to address the path planning problem of the full network information collection of the LEO satellite constellation, this paper introduces the in-band network telemetry technology which is more applicable to mobile satellite networks, improves it and forms the DLSDN in-band telemetry architecture, and proposes the SN-INT path planning algorithm based on the actual deployment of ground stations, taking the satellites that can only be directly controlled by ground stations as the telemetry starting and ending points as the The problem of adding the minimum number of auxiliary edges to the topological graph is abstracted into a minimum-weight perfect matching problem in graph theory and solved using the Euler-path planning algorithm with the constraint of minimum number of in-band telemetry initiations and minimum number of repeated traversal links.