LEO Satellite Link Prediction for Seamless Constellation Handover
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Solution Overview
Problem
LEO satellite communication systems face frequent link disruptions due to satellite movement, leading to instantaneous communication interruptions, which conventional routing protocols struggle to handle effectively, especially in high-volume data transmission scenarios.
Innovation Solution
A traffic control ground station predicts future satellite links based on trajectories and controls data transmission paths to switch to predicted links before disconnection, using a communication control unit to manage C-plane and U-plane separately, ensuring continuous communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional routing protocols are used in LEO satellite systems, then device complexity is reduced, but communication reliability deteriorates due to frequent link disruptions
Solution Approach 1:
The traffic control ground station performs preliminary actions by predicting future satellite positions and pre-determining optimal routing paths before link disruptions occur. The system calculates trajectories of LEO satellites and proactively establishes communication routes through the satellite constellation, ensuring seamless handovers and preventing communication interruptions before they happen.
2Reliability
If real-time link switching is implemented to maintain communication, then communication reliability improves, but response time deteriorates due to calculation delays
Solution Approach 1:
The system performs preliminary routing calculations by predicting satellite positions in advance and determining optimal paths before disruptions occur. This proactive approach eliminates real-time calculation delays during actual link failures, as routing decisions are pre-computed based on predicted satellite trajectories and communication requirements.
Solution Approach 2:
The traffic control mechanism dynamically adapts to changing satellite positions and communication demands by continuously updating predicted trajectories and re-optimizing routing paths. The system adjusts communication routes in response to moving satellites while maintaining seamless connectivity, balancing dynamic adaptation with efficient resource utilization.
3Reliability
If the ground station controls all routing decisions, then communication reliability improves, but device complexity at ground station increases
Solution Approach 1:
The traffic control functionality is segmented into distinct modules: trajectory prediction units that calculate satellite positions, routing optimization units that determine optimal paths, and control units that manage switching operations. This segmentation allows each component to specialize in specific tasks, improving overall system efficiency while distributing processing complexity across multiple functional units within the ground station.
Data Source
AI summary
A satellite constellation apparatus, a satellite constellation system, a method, and a non-transitory computer-readable medium that can prevent instantaneous interruption of communication are provided. A traffic control ground station is capable of communicating with a plurality of satellites and includes a communication control unit configured to predict a functional link through the plurality of satellites at a time point later than the present time point by a predetermined time based on trajectories of the plurality of satellites and control switching of transmission destinations of communication data transmitted and received by the satellites so that communication is performed by using the predicted functional link before a functional link through the plurality of satellites at the present time point is disconnected at the time point later by the predetermined time.