Dynamic LEO Downlink Power by User Altitude and Angle
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Solution Overview
Problem
Low Earth Orbit (LEO) satellites face challenges in providing consistent downlink power to users due to variable elevations and weather conditions, requiring additional satellites and higher power levels, which is time-consuming and expensive.
Innovation Solution
Dynamic power configuration methods for LEO satellites that adjust downlink transmission power based on altitude and transmission angle measurements from user equipment, using extraterrestrial base stations to optimize power usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If additional LEO satellites are deployed to a constellation to provide coverage in remote areas and global access, then the coverage area and service capability are improved, but the deployment time and cost increase significantly
Solution Approach 1:
The patent implements dynamic power configuration that adjusts downlink transmission power levels based on real-time conditions including user elevation, weather conditions, and satellite position. This allows existing satellites to adapt their service capability dynamically, effectively expanding coverage without adding more satellites, thereby resolving the contradiction between coverage area and deployment time
2Area of stationary object
If additional LEO satellites are deployed to a constellation to provide coverage in remote areas and global access, then the coverage area and service capability are improved, but the deployment cost increases significantly
Solution Approach 1:
The system dynamically adjusts downlink power configuration based on actual service needs, user elevation, and environmental conditions. This optimization allows the existing satellite constellation to serve remote areas more efficiently without requiring expensive additional satellite deployments, thereby resolving the contradiction between coverage area and deployment cost
3Reliability
If LEO satellites transmit at higher than necessary downlink transmit power levels to ensure coverage to all users, then the reliability of service is improved, but the power consumption and energy efficiency deteriorate
Solution Approach 1:
The patent implements dynamic power configuration that continuously adjusts downlink transmit power levels based on real-time measurements of user elevation, weather conditions, satellite position, and signal quality. This ensures reliable service coverage while minimizing power consumption by transmitting at the minimum necessary power level, thereby resolving the contradiction between service reliability and power consumption
Solution Approach 2:
The system changes the downlink power parameter dynamically based on measured conditions including user elevation angle, atmospheric conditions, and signal strength requirements. By adjusting this key parameter in response to changing conditions, the system maintains service reliability while optimizing power efficiency
4Reliability
If LEO satellites transmit at higher than necessary downlink transmit power levels to ensure coverage to all users, then the service coverage quality is improved, but the power consumption increases
Solution Approach 1:
The system dynamically configures downlink power levels based on real-time conditions including user elevation, weather, and signal requirements. This ensures adequate power delivery for reliable service while minimizing energy waste by avoiding transmission at unnecessarily high power levels, thereby resolving the contradiction between downlink power delivery and energy efficiency
Data Source
AI summary
The method begins with receiving, at an extraterrestrial base station, at least one first uplink communication from a first device. The first uplink communication contains an altitude measurement and at least one of: a signal strength measurement and a power level of the first device. The method then continues with determining a location and transmission angle of the first device with respect to a field of regard of the extraterrestrial base station. Then, a downlink transmission power setting for the extraterrestrial base station is dynamically determined based on the altitude measurement and the transmission angle of the first device.