Dynamic Transmission Power Adjustment for Microwave Links
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Solution Overview
Problem
In microwave transmission systems, existing methods fail to dynamically adjust transmission power in response to varying channel conditions, leading to inefficiencies such as service interruptions from low power and system gain wastage from high power.
Innovation Solution
A method and apparatus that acquire and utilize transmission power and modulation mode configuration information to calculate and adjust transmission power and modulation mode based on current channel conditions, ensuring power remains within set limits and modulation modes are optimized.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If transmission power is increased to ensure service continuity, then reliability is improved, but energy consumption increases and system gain is wasted
Solution Approach 1:
The patent implements dynamic transmission power adjustment by continuously monitoring channel conditions (SNR, fading state) and adapting the transmission power level in real-time. The system transitions from static power allocation to dynamic power control, where power is increased only when channel conditions deteriorate and reduced when conditions improve, thereby maintaining service continuity while minimizing energy waste.
Solution Approach 2:
The system changes transmission power as a variable parameter based on channel state information. By monitoring parameters such as signal-to-noise ratio and fading depth, the system adjusts the transmission power level to match actual channel conditions, ensuring reliable communication during poor conditions while conserving energy during good conditions.
2Reliability
If transmission power is increased to overcome channel degradation, then reliability is improved, but interference to other systems increases
Solution Approach 1:
The patent applies local quality adjustment by tailoring transmission power to specific local channel conditions rather than using a uniform high power level. The system identifies localized fading regions and increases power only in those specific time-frequency slots where channel degradation occurs, leaving other slots with lower power to minimize interference to neighboring systems.
3Productivity
If adaptive modulation is used to improve transmission efficiency, then productivity is improved, but system complexity increases
Solution Approach 1:
The system implements dynamic modulation adaptation by selecting modulation schemes (QPSK, 16-QAM, 64-QAM, etc.) based on real-time channel conditions. The modulation order is adjusted dynamically - using higher-order modulation when channel quality is good to maximize throughput, and switching to lower-order modulation when conditions deteriorate to maintain reliability, thereby optimizing transmission efficiency adaptively.
4Use of energy by moving object
If transmission power is decreased to save energy, then energy consumption is reduced, but service interruption occurs
Solution Approach 1:
The patent employs feedback mechanisms where the receiver monitors channel quality metrics (SNR, bit error rate) and feeds this information back to the transmitter. Based on this feedback, the transmitter adjusts power levels appropriately - reducing power when channel conditions are good to save energy, and increasing power when feedback indicates deteriorating conditions that would cause service interruption.
Data Source
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AI summary
A method and an apparatus of adjusting transmission power are provided. Transmission power configuration information is acquired, where the transmission power configuration information includes a transmission power lower limit and a transmission power upper limit; modulation mode configuration information is acquired, where the modulation mode configuration information includes a lower limit modulation mode and an upper limit modulation mode; current channel information is acquired; calculation is performed according to the current channel information, the transmission power configuration information and the modulation mode configuration information to obtain first transmission power and a first modulation mode; and signal transmission is controlled according to the first transmission power and the first modulation mode.