Dynamic Power Class Reduction for SAR-Compliant Transmission
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communications systems reduce transmit power more than necessary to comply with safety parameters like SAR and MPE, leading to reduced signal quality and UE performance.
Innovation Solution
Implement power class reduction algorithms that minimize power reduction while maintaining compliance with safety parameters by adjusting ΔPPowerClass based on duty cycles and using MPR/A-MPR for higher power classes when necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If power class reduction is applied to comply with safety parameters (SAR, MPE), then user safety is improved, but signal quality and device performance deteriorate
Solution Approach 1:
The patent implements dynamic adjustment of power class reduction based on measured duty cycle. The UE determines ΔPPowerClass by comparing measured duty cycle against maximum duty cycle, allowing the power reduction to vary dynamically rather than applying a fixed reduction. This resolves the contradiction by adapting the safety compliance level to actual transmission conditions, maintaining safety while preserving signal quality when possible.
Solution Approach 2:
The patent changes the parameter ΔPPowerClass based on duty cycle measurements. When the measured duty cycle is below the maximum duty cycle, the UE reduces or eliminates power class reduction, thereby changing the transmit power parameter to improve signal quality while still maintaining safety compliance through duty cycle control.
2Object-affected harmful factors
If power class reduction is applied to comply with safety parameters, then regulatory compliance is improved, but transmit power and coverage deteriorate
Solution Approach 1:
The system dynamically adjusts transmit power by modulating ΔPPowerClass according to duty cycle measurements. When duty cycle conditions permit, the UE transmits at higher power levels, maximizing transmit power and coverage while still meeting regulatory requirements through duty cycle-based control.
Solution Approach 2:
The patent employs periodic duty cycle measurement and evaluation to control power transmission. By measuring duty cycle over evaluation periods and adjusting power class reduction accordingly, the system achieves regulatory compliance through periodic control while maintaining higher average transmit power when conditions allow.
3Object-affected harmful factors
If fixed power class reduction is applied, then safety parameter compliance is ensured, but device performance and signal quality worsen
Solution Approach 1:
The patent replaces fixed power class reduction with a dynamic determination mechanism that evaluates measured duty cycle against maximum duty cycle. This allows device performance to vary dynamically based on actual conditions, achieving safety compliance while maximizing productivity when duty cycle conditions permit higher power transmission.
Data Source
AI summary
Various aspects of the present disclosure relate to a user equipment (UE) that controls aspects of power reduction for signal transmission to reduce an amount of power reduction that is applied as part of compliance with user safety parameters. For instance, power class reduction algorithms are disclosed that provide minimum power class reductions for different power classes while enabling compliance with specified user safety parameters. Further, the described techniques enable appropriate maximum power reduction (MPR) or additional maximum power reduction (A-MPR) values to be identified and applied in conjunction with power reduction.