Satellite Data Transmission Parameter Update via Demodulation Feedback
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Solution Overview
Problem
Satellite communication systems face high latency and reliability issues due to the long distance between satellites and terminals, which affects data transmission performance, especially when Hybrid Automatic Repeat Request (HARQ) feedback mechanisms are used, as they increase latency and require cache design adjustments.
Innovation Solution
A data transmission method where terminals determine demodulation performance parameters and report target indication information to satellites to update transmission parameters, allowing for improved data transmission efficiency and reliability by adjusting modulation, coding schemes, resource allocation, and power levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If HARQ feedback mechanism is used for data transmission in satellite communication, then data transmission reliability is improved, but transmission latency increases significantly
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple transmission parameters (modulation schemes, coding rates, power levels) before actual data transmission. The terminal device prepares a set of candidate parameters and their corresponding demodulation performance indicators in advance, so that when parameter adjustment is needed, the satellite can quickly select from pre-prepared options rather than calculating new parameters in real-time, thus reducing latency while maintaining reliability
Solution Approach 2:
The patent implements dynamics by enabling dynamic adjustment of transmission parameters based on real-time demodulation performance feedback. The system transitions from static pre-configured parameters to dynamic adaptive parameters, where the terminal reports demodulation performance indicators and the satellite adjusts transmission parameters accordingly, allowing the system to adapt to changing channel conditions while minimizing latency through efficient feedback mechanisms
2Reliability
If HARQ feedback mechanism is implemented, then transmission reliability is enhanced, but terminal cache design complexity increases
Solution Approach 1:
The patent applies the extraction principle by separating the complex cache management functions from the terminal device and relocating them to the satellite. The terminal only needs to report simple demodulation performance indicators, while the satellite handles the complex tasks of parameter selection, cache management, and retransmission control, thereby significantly reducing terminal cache design complexity while maintaining reliability
Solution Approach 2:
The patent uses demodulation performance indicators as an intermediary between the terminal and satellite. Instead of the terminal directly managing complex cache operations and parameter adjustments, it simply reports performance indicators that serve as intermediaries for the satellite to make intelligent decisions about parameter adjustments and cache management, simplifying terminal design while ensuring reliable transmission
3Productivity
If transmission parameters are adjusted dynamically based on demodulation performance, then data transmission efficiency is improved, but system complexity increases
Solution Approach 1:
The patent applies partial action by selectively adjusting only the most critical transmission parameters (such as modulation scheme and coding rate) based on demodulation performance indicators, rather than adjusting all possible parameters. This targeted approach improves transmission efficiency by focusing computational resources on the parameters that have the greatest impact on performance, while avoiding the excessive complexity that would result from adjusting every parameter
Solution Approach 2:
The patent implements parameter changes by systematically varying transmission parameters (modulation schemes, coding rates, power levels) based on observed demodulation performance. The satellite monitors performance indicators and adjusts parameters within predefined ranges to optimize transmission efficiency, using structured parameter adjustment strategies that improve productivity while controlling system complexity through predefined adjustment rules
Data Source
AI summary
A data transmission method, apparatus and computer readable storage medium that improve the reliability and efficiency of data transmission. The reliability and efficiency of data transmission are improved by determining one or more demodulation performance parameters for demodulating data received through a satellite; reporting target indication information determined according to the demodulation performance parameters to the satellite, wherein the target indication information is configured to instruct the satellite to update one or more transmission parameters for the terminal performing data transmission; and performing data transmission with the satellite according to updated one or more target transmission parameters transmitted by the satellite.