Wireless Device TER Control via Dynamic Power Limits
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Solution Overview
Problem
Wireless electronic devices face a challenge in satisfying total exposure ratio (TER) regulations without degrading communication performance, as reducing transmit power to comply with TER regulations can lead to performance degradation.
Innovation Solution
An electronic device with multiple antennas and a controller that sets transmit power limits, calculates residual TER values, and adjusts power control modes to optimize communication performance while adhering to TER regulations by dynamically managing transmit power across different communication networks and time windows.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If transmit power is reduced to satisfy TER regulation condition, then TER compliance is improved, but communication performance deteriorates
Solution Approach 1:
The patent implements dynamic power control by continuously monitoring residual TER values and adjusting transmit power limits in real-time based on current TER conditions. The controller dynamically sets power limits for target windows, allowing the system to adapt to changing electromagnetic exposure conditions while maintaining optimal communication performance when TER conditions permit.
Solution Approach 2:
The system changes the transmit power parameter dynamically based on calculated residual TER values. By adjusting the power limit parameter according to TER measurement results and power control mode, the system optimizes the balance between TER compliance and communication performance through parameter variation rather than fixed power reduction.
2Object-generated harmful factors
If transmit power is reduced to satisfy TER regulation condition, then electromagnetic exposure is reduced, but power transmission capability deteriorates
Solution Approach 1:
The system dynamically adjusts the transmit power parameter based on residual TER calculations. When residual TER values indicate available headroom, the system increases power transmission capability; when TER limits are approached, power is reduced accordingly. This parameter change strategy maintains both electromagnetic safety and transmission capability.
Solution Approach 2:
The patent implements a feedback mechanism where TER measurements are continuously monitored, residual TER values are calculated, and power limits are adjusted based on this feedback. The controller uses the feedback loop to maintain power transmission capability within safe electromagnetic exposure limits, optimizing the balance between safety and performance.
Data Source
AI summary
An electronic device includes a plurality of antennas, a transmitter configured to be selectively connected to at least one antenna of the plurality of antennas, and a controller configured to set a transmit power limit of the transmitter. The controller is further configured to calculate a residual total exposure ratio (TER) value for a TER measurement period based on transmit power of the transmitter output through the at least one antenna, set a power control mode of the electronic device, based on a comparison between the residual TER value and a first reference TER value, and set the transmit power limit for a target window based on the power control mode.