UE Power Amplifier Selection Using Offline Characterization Data
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Solution Overview
Problem
Existing user equipment (UE) systems face inefficiencies in selecting the appropriate power amplifier for antenna transmission, leading to suboptimal power consumption and signal transmission based on varying transmission conditions.
Innovation Solution
The UE stores characterization data associating transmission parameters with thresholds to select between peak performance and efficient power amplifiers based on target power output, generated through offline characterization in a laboratory environment, enabling efficient power amplifier selection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single power amplifier is used for all transmission conditions, then device complexity is reduced, but power consumption and signal transmission efficiency become suboptimal
Solution Approach 1:
The patent divides the power amplifier selection into discrete segments based on transmission conditions. Multiple power amplifiers are configured with different performance characteristics (peak performance vs. efficient), and the system selects appropriate segments (amplifiers) based on measured transmission conditions such as path loss and proximity to base station, thereby optimizing power consumption without requiring a single complex amplifier design
Solution Approach 2:
The system dynamically switches between different power amplifiers based on real-time transmission conditions. The UE measures conditions like path loss and determines which power amplifier to use, making the power amplifier selection adaptive and dynamic rather than static, allowing optimization of both power consumption and signal transmission quality under varying network conditions
2Reliability
If peak performance power amplifier is always selected, then signal transmission quality is maximized, but power consumption increases unnecessarily
Solution Approach 1:
Different power amplifiers are assigned different local qualities or characteristics tailored to specific transmission conditions. The system has a first power amplifier optimized for peak performance when needed (e.g., at cell edge with high path loss) and a second power amplifier optimized for efficiency when conditions permit, allowing each amplifier to operate with its optimal characteristics for its intended use case
Solution Approach 2:
The system changes the operating parameters by selecting different power amplifiers based on measured transmission conditions. When path loss exceeds a threshold (indicating poor signal conditions), the system switches to the peak performance amplifier. When path loss is below the threshold (indicating good signal conditions), it switches to the efficient amplifier, thereby dynamically adjusting system parameters to optimize both quality and consumption
3Use of energy by moving object
If efficient power amplifier is always selected, then power consumption is minimized, but signal transmission quality deteriorates when needed
Solution Approach 1:
The UE continuously measures transmission conditions such as path loss and uses this feedback information to determine when to switch between power amplifiers. When measurements indicate that the efficient amplifier cannot maintain adequate signal quality (e.g., when path loss is high), the feedback mechanism triggers a switch to the peak performance amplifier, ensuring signal quality requirements are met while minimizing power consumption during acceptable conditions
4Use of energy by moving object
If power amplifier selection is made in real-time based on measurements, then power consumption is optimized, but processing time and complexity increase
Solution Approach 1:
The system performs preliminary characterization of different power amplifiers and their performance characteristics before actual transmission occurs. Thresholds for path loss are pre-determined and stored, allowing the UE to quickly compare measured conditions against these pre-established criteria during operation, avoiding complex real-time calculations and enabling rapid amplifier selection based on simple threshold comparisons
Data Source
AI summary
The present application relates to selecting a power amplifier from among a plurality of power amplifiers of a user equipment (UE) for use in transmitting data via an antenna of the UE to a base station. In an example, the UE stores characterization data that indicates the selection of the power amplifier given a requested power output for the uplink transmission and a set of transmission parameters. This set can include any or a combination of the antenna, a radio access technology, a frequency band, and/or a frequency bandwidth. The characterization data can be generated according to an offline characterization process and can be stored as a look-up table in a memory of the UE.