Antenna Output Power Control via Location-Based Dynamic Reduction
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Solution Overview
Problem
Current wireless terminal devices enable or disable dynamic power reduction (DPR) functions based on frequency bands rather than country-specific SAR standards, leading to unnecessary power reduction and communication quality degradation in countries with less strict regulations.
Innovation Solution
Implement a method in wireless terminal devices to automatically recognize the operating country and enable or disable the DPR function for each frequency band, using a reference table to determine the necessary power reduction, thereby ensuring compliance with SAR regulations while maintaining communication quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If dynamic power reduction function is enabled based on frequency band, then SAR compliance is improved, but communication quality deteriorates due to unnecessary power reduction
Solution Approach 1:
The patent applies local quality by enabling DPR function selectively for specific frequency bands (e.g., Band 12 in the USA) rather than uniformly across all bands. The control unit determines whether to enable DPR based on the specific frequency band being used, allowing SAR compliance in regions where needed while maintaining full power transmission in regions where SAR limits are not restrictive, thus preserving communication quality.
2Object-affected harmful factors
If dynamic power reduction is applied, then electromagnetic energy absorption is reduced, but transmission power is unnecessarily reduced in countries with less strict regulations
Solution Approach 1:
The patent implements dynamics by making the DPR function configurable and adaptable based on operating conditions. The control unit dynamically enables or disables the DPR function depending on the detected frequency band and location. This dynamic adjustment ensures that transmission power is reduced only when necessary for SAR compliance, while maintaining full power when operating in countries with less strict regulations, thus optimizing the balance between electromagnetic energy absorption reduction and transmission power utilization.
3Object-affected harmful factors
If DPR function is always enabled, then SAR standards are met, but device complexity increases due to continuous monitoring and control
Solution Approach 1:
The patent applies partial action by implementing DPR selectively rather than continuously. The control unit enables the DPR function only for specific frequency bands where SAR compliance is required (such as Band 12 in the USA), and disables it for other bands where SAR limits are not restrictive. This partial implementation reduces the burden on the monitoring and control system, thereby reducing device complexity while still meeting SAR standards where applicable.
Data Source
AI summary
An embodiment provides a information handling device, including: one or more processors; one or more antennas, a communication element, and a memory device that stores instructions executed by the one or more processors, the instructions being executable by the one or more processors to: recognize a location within which the information handling device is operating through wireless communication received via the communication element; and modulate, based on which location the information handling device is operating within, a dynamic power reduction of transmission power through the antenna.