Body Proximity RF Power Control for Wireless User Equipment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Wireless communication devices face challenges in balancing transmission power to cover greater distances with less data loss while minimizing radio frequency exposure to users, necessitating a solution that adheres to regulatory RF exposure limits.
Innovation Solution
User equipment employs a body proximity sensor to adjust transmission power levels based on the probability of detecting a human body, switching between high and low power levels to ensure compliance with RF exposure limits, optimizing transmission power gain while maintaining safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If user equipment uses greater transmission power to transmit signals over greater distance and with less data loss, then transmission coverage and signal quality are improved, but radio frequency exposure to the user increases
Solution Approach 1:
The patent applies dynamics by making the transmission power level adjustable and adaptive rather than fixed. The system dynamically switches between first transmission power level (higher power) and second transmission power level (lower power) based on real-time body proximity detection, allowing the transmission power to optimize between coverage distance and RF exposure reduction according to actual usage conditions
Solution Approach 2:
The patent implements feedback through the body proximity sensor that continuously monitors the presence of a user's body near the antenna. This feedback signal is used by the processor to automatically adjust the transmission power level, creating a closed-loop control system that responds to changing conditions and maintains optimal balance between transmission performance and safety
2Object-affected harmful factors
If transmission power is limited to reduce radio frequency exposure effect on user, then radio frequency exposure is reduced, but transmission distance and signal quality deteriorate
Solution Approach 1:
The system dynamically adjusts transmission power based on detected body proximity. When no body is detected or probability is below threshold, the system uses first transmission power level (higher power) to maximize transmission performance. When body proximity is detected above threshold, it switches to second transmission power level (lower power) to reduce RF exposure, thus adapting transmission performance to actual safety requirements
Solution Approach 2:
The patent changes the transmission power parameter based on body proximity detection results. The processor determines a probability of body presence and adjusts the transmission power level accordingly, switching between two distinct power levels. This parameter change allows the system to optimize transmission performance when safe and reduce power when necessary to protect user health
3Object-affected harmful factors
If body proximity sensor continuously monitors to detect body presence, then radio frequency exposure safety is improved, but device complexity and energy consumption increase
Solution Approach 1:
The body proximity sensor performs self-service by automatically detecting body presence and providing feedback signals without requiring manual user input or complex external monitoring systems. The sensor autonomously monitors the environment and triggers power level adjustments based on detected conditions, simplifying the overall system architecture while maintaining safety
Solution Approach 2:
The system uses simple feedback from the body proximity sensor to control transmission power adjustments. The sensor provides binary or probabilistic detection signals that directly inform the processor when to switch between power levels, creating an efficient control mechanism that balances safety monitoring with system simplicity and low energy consumption
Data Source
AI summary
A first transmission power level based on a radio frequency exposure limit and a second transmission power level based on the first transmission power level and a probability of detection of a body by a body proximity sensor are determined, where it is ensured that an average usage of the first and second transmission power levels over time does not exceed the transmission power limit, determined based on radio frequency exposure limits. A transmission power gain is determined based on a difference between the first and second transmission power level based on the probability of detection, and a false alarm rate of the body by the body proximity sensor. The transmission power gain may be used as a performance indicator to select from multiple first and second transmission power gains. First and second transmission power gains corresponding to the selected transmission power gain may be stored and applied during transmission.