Segment Routing Algorithm for Mega LEO Constellations

Against the backdrop of limited transmission resources, high latency, and diverse transmission service types within mega LEO constellation space networks, this paper proposes a segment routing algorithm tailored for mega LEO constellations. In this algorithm, the application-aware module at the satellite head node collects application-specific information, while the route calculation module employs the quadrant method to filter and compute satellite segment nodes, ultimately generating an IP packet with a path label stack. The algorithm dynamically adjusts the routing path based on various application data, optimizes QoS guarantees for routing, supports the selection of satellite segment nodes in segment routing, and effectively enhances system throughput while reducing packet loss. Simulation results indicate that the proposed routing algorithm outperforms others in latency, packet loss rate, and throughput within mega LEO constellations.