Adaptive Wireless Relay Transmission Scheme for Channel Capacity
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Solution Overview
Problem
In wireless communication systems where a relay device moves, such as on a UAV or geosynchronous satellite, channel capacity fluctuates, leading to inefficient use of communication resources due to either insufficient or excessive data transmission relative to available capacity.
Innovation Solution
A communication system and method that estimates channel capacity and adjusts transmission schemes based on channel conditions, using lower efficiency for higher quality when capacity is high and lower quality for higher efficiency when capacity is low, employing techniques like MIMO and adaptive transmission power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If data transmission timing is fixed regardless of channel capacity changes, then communication system is simple to operate, but communication resources are not effectively used
Solution Approach 1:
The patent applies dynamics by making the transmission scheme adjustable based on real-time channel capacity changes. The system transitions from a fixed transmission mode to a dynamic one where transmission parameters (such as modulation scheme, coding rate) are automatically adjusted according to the estimated channel capacity, thereby optimizing communication resource utilization without requiring complex manual intervention.
Solution Approach 2:
The patent implements feedback by incorporating channel capacity estimation into the transmission control loop. The system continuously estimates the current channel capacity and uses this information to determine the appropriate transmission scheme, creating a closed-loop control mechanism that adapts transmission parameters based on actual channel conditions to maximize resource efficiency.
2Reliability
If transmission scheme is fixed, then device complexity is low, but transmission quality varies with channel capacity changes
Solution Approach 1:
The patent applies parameter changes by modifying transmission parameters (modulation order, coding rate, power level) based on estimated channel capacity. When channel capacity is high, the system uses higher-order modulation and better coding rates to maximize transmission quality. When channel capacity is low, the system switches to more robust but lower-efficiency transmission modes, thereby maintaining reliable communication across varying channel conditions.
3Productivity
If transmission efficiency is maximized always, then communication resource utilization is high, but data loss increases when channel capacity is low
Solution Approach 1:
The patent resolves this contradiction by making transmission efficiency dynamic rather than fixed. The system adjusts the balance between transmission efficiency and reliability based on real-time channel capacity estimates. When channel conditions are good, it maximizes efficiency; when conditions deteriorate, it prioritizes reliability by switching to more robust transmission modes, preventing data loss while maintaining high overall productivity.
Data Source
AI summary
A capacity estimation unit estimates a channel capacity related to wireless communication between a communication device and a relay device. A scheme determination unit determines a transmission scheme of the data from the communication device to the relay device to be a scheme in which transmission efficiency is lower and transmission quality is higher as the channel capacity is larger, or to be a scheme in which the transmission quality is lower and the transmission efficiency is higher as the channel capacity is smaller.