Rate Adaptive Satellite Data Transmission
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current satellite communication systems are inefficient as they transmit data at a fixed, worst-case rate due to infrequent worst-case conditions, leading to underutilization of resources like transmitter power and antenna size, and fail to adapt to varying link quality and location-related changes in data transmission capacity.
Innovation Solution
Implementing a rate adaptive data transmission system that monitors downlink parameters such as signal-to-noise ratio, data error rate, and satellite location to adjust transmission rates dynamically, allowing for higher rates when conditions improve and lower rates when they deteriorate, using a satellite with a rate adaptive transmitter and a terrestrial receiving station with a rate adaptive receiver.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If satellite communication systems transmit data at a fixed worst-case rate, then reliability is maintained under all conditions, but productivity is significantly reduced due to underutilization of transmission capacity during good conditions
Solution Approach 1:
The patent implements dynamic rate adaptation by continuously monitoring downlink parameters (signal-to-noise ratio, data error rate, satellite location) and adjusting the transmission rate accordingly. The system transitions from a static fixed-rate transmission to a dynamic adaptive transmission that responds to changing channel conditions, thereby resolving the contradiction between maintaining reliability and maximizing productivity.
Solution Approach 2:
The system employs feedback mechanisms where the receiver monitors downlink parameters and sends rate adaptation commands back to the satellite transmitter. This closed-loop feedback enables the system to maintain reliable communication by adjusting the transmission rate based on actual channel conditions, while simultaneously maximizing data download capacity during favorable conditions.
2Adaptability or versatility
If satellite communication systems use fixed worst-case transmission parameters, then adaptability to varying conditions is lost, but device complexity is reduced
Solution Approach 1:
The patent changes the transmission parameter (data rate) dynamically based on monitored downlink parameters. The system adjusts the transmission rate to match current channel conditions, enabling adaptability to varying link quality without requiring complex hardware modifications. This parameter-based adaptation resolves the contradiction between adaptability and device complexity.
3Productivity
If satellite communication systems transmit at higher rates during good conditions, then productivity increases, but reliability may deteriorate when conditions worsen
Solution Approach 1:
The system dynamically adjusts the transmission rate based on real-time monitoring of downlink parameters. When channel conditions are good, the system increases the transmission rate to maximize productivity. When conditions deteriorate, the system automatically reduces the rate to maintain reliability, thus resolving the contradiction between productivity and reliability through dynamic adaptation.
Solution Approach 2:
The feedback mechanism continuously monitors downlink parameters and adjusts the transmission rate accordingly. This ensures that the system maintains reliable communication by reducing the rate when conditions worsen, while maximizing productivity when conditions are favorable, effectively resolving the contradiction through closed-loop control.
Data Source
AI summary
A system and method for transmitting data from a satellite to a terrestrial receiving station are provided. The system comprises a satellite including a rate adaptive data receiver. The system is configured to establish a data transmission for the satellite to the terrestrial receiving station; the data transmission having an initial transmission rate. The system further monitors one or more downlink parameters of the data transmission, and when the one or more downlink parameters meets a criteria, both the rate adaptive data transmitter and the rate adaptive data receiver simultaneously adjust the data transmission to a new data transmission rate, and transmit the data at the new data transmission rate.