Uplink Scheduling Using Power Amplifier Nonlinear Efficiency
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Solution Overview
Problem
Existing mobile communication terminal UpLink (UL) scheduling methods do not adequately consider the nonlinear efficiency characteristics of power amplifiers, leading to suboptimal energy efficiency in data transmission.
Innovation Solution
A method and apparatus for calculating packet transmission time that minimizes energy consumption by utilizing the nonlinear amplification efficiency of the power amplifier, allowing for optimized UL scheduling in mobile communication terminals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If transmission time is extended to improve energy efficiency, then energy consumption per bit decreases, but transmission delay increases
Solution Approach 1:
The patent changes the parameter of transmission time dynamically based on the power amplifier's operating state and nonlinear efficiency characteristics. By adjusting transmission time according to real-time conditions rather than using fixed scheduling, the system achieves optimal energy efficiency while minimizing unnecessary delays.
Solution Approach 2:
The patent introduces dynamic transmission time calculation that adapts to the power amplifier's instantaneous efficiency characteristics. The scheduling mechanism transitions from static to dynamic, allowing the system to respond to changing operational conditions and optimize the trade-off between energy consumption and transmission delay in real-time.
2Device complexity
If fixed efficiency assumption is used for power amplifier, then calculation complexity is reduced, but energy efficiency optimization is insufficient
Solution Approach 1:
The patent changes the efficiency parameter from a fixed constant to a dynamic variable that reflects the power amplifier's actual nonlinear efficiency characteristics. This allows the system to capture the true efficiency behavior across different operating points while managing calculation complexity through efficient algorithms.
Solution Approach 2:
The patent implements a feedback mechanism where the power amplifier's efficiency characteristics are continuously monitored and fed back into the transmission time calculation. This closed-loop approach enables the system to adapt to changing efficiency conditions and optimize energy consumption without requiring overly complex open-loop calculations.
3Use of energy by moving object
If nonlinear amplification efficiency is considered, then energy efficiency is optimized, but calculation complexity increases
Solution Approach 1:
The patent transforms the calculation from using a simple fixed efficiency parameter to using dynamic efficiency parameters that capture nonlinear characteristics. The system manages this increased complexity through efficient computational approaches that leverage the specific structure of the nonlinear efficiency model.
Solution Approach 2:
The patent performs preliminary characterization of the power amplifier's nonlinear efficiency characteristics and stores this information for reuse. By pre-processing and caching efficiency data, the system reduces the computational burden during actual transmission scheduling while still capturing the full nonlinear behavior for optimal energy efficiency.
Data Source
AI summary
An UpLink (UL) scheduling method and apparatus considering a characteristic of a power amplifier in a mobile communication terminal are provided. The UL scheduling method includes calculating a packet transmission time, which minimizes energy consumed in packet transmission, by using a Direct Current (DC) voltage used in a power amplifier for signal amplification and by using nonlinear amplification efficiency; and scheduling UL data by using the calculated packet transmission time.