Research on Routing Topology Classification of Polar Orbit Constellation Satellite Networks

In recent years, a series of progress has been made in the research on the routing topology of low-orbiting (LEO) satellite networks. In this paper, we take the LEO satellite network of the polar orbit constellation as the main research object, and conducts a detailed study on the classification of the network routing topology. We analyze the network routing topology structure of polar-orbiting constellations, and propose a network topology classification strategy based on the state of inter-satellite links. The simulation results show that, under this strategy, the routing topology of a LEO satellite network in a polar-orbiting constellation configuration can be represented periodically by a small number of topologies. This proves that incorporating ephemeris prediction can effectively reduce topology changes and reduce the required routing computations.