Satellite Control Unit Set-Based Scheduling Optimization
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Solution Overview
Problem
Satellite communication systems face challenges in optimizing system throughput due to interference between beams and the need for user scheduling in multi-beam satellite systems, where precoding techniques have not been fully implemented, leading to inefficiencies in communication quality and throughput.
Innovation Solution
A control unit is configured to determine joint communication quality for sets of terminals, identify liable terminals causing low quality, and schedule communications accordingly, allowing for efficient scheduling and exclusion of terminals with poor quality to prevent interference and optimize system throughput.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If precoding techniques are implemented for satellite communication, then communication quality and system throughput are improved, but user scheduling complexity increases
Solution Approach 1:
The patent segments users into sets and schedules them in batches rather than individually. The control unit divides the plurality of terminals into multiple sets, where each set is scheduled together with a common precoding matrix. This segmentation approach reduces the scheduling complexity from O(N) individual user scheduling to O(N/K) set-based scheduling, where K is the average set size, while maintaining communication quality through joint precoding for each set.
2Area of stationary object
If beam coverage area is increased, then coverage is improved, but interference between beams increases
Solution Approach 1:
The patent applies local quality by customizing the precoding matrix for each user set based on their specific channel conditions. Instead of using a uniform precoding approach for the entire beam, the control unit determines a dedicated precoding matrix for each set of terminals, optimizing the signal transmission for that specific local group while minimizing interference. This allows the beam to maintain large coverage area while reducing inter-beam interference through set-specific precoding optimization.
3Productivity
If all terminals are scheduled with common precoding, then system throughput is improved, but communication quality for individual terminals with poor channels deteriorates
Solution Approach 1:
The patent implements dynamics by adaptively forming user sets and selecting precoding matrices based on real-time channel conditions. The control unit continuously monitors channel state information and dynamically adjusts the set composition and precoding parameters. This allows the system to optimize the balance between system throughput and individual terminal quality by adapting to changing channel conditions, ensuring that terminals with poor channels are appropriately grouped or scheduled while maintaining overall system efficiency.
Data Source
AI summary
A control unit is configured to control a communication between a satellite and a plurality of terminals, wherein the control unit is configured for controlling the communication such that communication is scheduled to a terminal, the communication being one of at least a set-wise first type for a set of terminals and/or a second type. The control unit is configured for determining a joint communication quality for a set of terminals from the plurality of terminals using a joint communication information of the set of terminals. The control unit is configured for determining that the joint communication quality is below a quality threshold value, determining a liable terminal from the set of terminals, the liable terminal being liable for the joint communication quality being below the quality threshold value, and controlling the communication such that communication of the second type is scheduled to the liable terminal.