Satellite Beam Hopping Synchronization via Ground Segment Timing
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Solution Overview
Problem
Current satellite communication systems face inefficiencies in synchronizing beam hopping sequences between the satellite and ground segments, leading to misalignment of data transmission and reception, which affects connectivity and resource utilization.
Innovation Solution
A payload system with beamforming networks, a controller, and a synchronisation pulse generator, synchronized with a master clock signal, allows for seamless updates of beam hopping sequences, ensuring alignment with ground data sequence switching by generating synchronisation pulses at predetermined reset times, enabling continuous and efficient antenna coverage changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If beam hopping sequences are updated frequently to adapt to changing environments, then adaptability is improved, but synchronization complexity increases
Solution Approach 1:
The ground segment calculates and transmits future reset times in advance before the actual beam hopping sequence update occurs. This preliminary action allows the satellite to prepare for synchronization without complex real-time calculations, reducing synchronization complexity while maintaining frequent updates for adaptability
Solution Approach 2:
The system uses feedback mechanisms where the satellite confirms receipt and processing of beam hopping sequence updates, and the ground segment adjusts future update timing based on satellite response. This feedback loop ensures synchronization is maintained despite frequent adaptations
2Productivity
If data transmission is aligned with beam hopping switches, then data transmission efficiency is improved, but loss of time for synchronization increases
Solution Approach 1:
The ground segment calculates the exact reset times when beam hopping sequences will change and transmits synchronization information in advance. This allows data frames to be pre-aligned with upcoming beam switches, eliminating the need for time-consuming real-time synchronization adjustments and minimizing transmission efficiency losses
Solution Approach 2:
The system maintains continuous synchronization by establishing reset times that occur at regular intervals, ensuring data transmission can continuously align with beam hopping without interruption. This continuous alignment prevents synchronization pauses that would reduce data transmission efficiency
3Productivity
If beam switching occurs rapidly to maximize throughput, then productivity is improved, but measurement precision of synchronization decreases
Solution Approach 1:
The ground segment calculates future reset times based on predetermined intervals before beam switching occurs. This preliminary calculation allows for precise synchronization even at rapid switching rates, as the timing is established in advance rather than measured in real-time during fast transitions
Solution Approach 2:
The system uses periodic reset times that occur at regular intervals to synchronize beam hopping sequences. This periodic action provides a stable timing reference that maintains measurement precision even when beam switching occurs rapidly between periods
Data Source
AI summary
An improved procedure and associated hardware to allow a satellite to switch antenna coverages according to predefined repetitive sequences and to align switching of the antenna sequence with ground data sequence switching. The principle of synchronisation of the sequence switching is based on the anticipation of the exact time at which change in beam hopping sequence occurs at the satellite, such that a change to a beam hopping sequence can be reflected in ground data sequence switching without losing connectivity between the satellite and ground segment.