Radio Module TX Power Ratio Adjustment Under RF Exposure Limits

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Solution Overview

Problem

Existing methods for allocating TX power in multiple radio modules in user equipment (UE) result in inefficiencies and reduced performance due to fixed TX power ratios, leading to unused power margins in some modules while others cannot utilize them, failing to meet regulatory RF exposure limits and performance requirements simultaneously.

Innovation Solution

A method and radio module that dynamically adjust TX power ratios by interacting with other modules to allocate unused power margins, using RF exposure limits to map TX power limits and adjust ratios based on module status and performance indices, ensuring compliance with regulatory limits and optimizing performance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional fixed ratio TX power allocation method is used, then RF exposure limit compliance is ensured, but power utilization efficiency deteriorates due to unused power margins

Engineering Contradiction:

ImproveRF exposure limit complianceVSAvoidpower utilization efficiency

Core Design Contradiction:

ReliabilityVSLoss of energy

Solution Approach 1:

The patent implements dynamic TX power ratio adjustment where radio modules can flexibly allocate power margins to each other based on real-time needs. The system transitions from fixed predetermined ratios to dynamic adjustable ratios, allowing modules to optimize power distribution while maintaining RF exposure compliance through continuous monitoring and adjustment mechanisms.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the TX power ratio parameter from fixed predetermined values to dynamically adjustable values. By allowing the power ratio to vary based on actual transmission needs and available power margins, the system achieves both RF exposure limit compliance and improved power utilization efficiency through parameter optimization.

Inventive Principle:

Principle #35Parameter changes

2Reliability

If maximum available TX power ratio is allocated to multiple radio modules with predetermined fixed ratio, then RF exposure limit is met, but performance deteriorates due to inability to utilize TX power margin

Engineering Contradiction:

ImproveRF exposure limit complianceVSAvoidperformance

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent enables dynamic power margin utilization by allowing radio modules to adjust their TX power ratios in real-time. When a module has unused power margin, other modules can dynamically receive additional power allocation, optimizing overall system performance while maintaining RF exposure compliance through coordinated adjustment.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system incorporates feedback mechanisms where radio modules monitor their power usage and RF exposure levels. Based on this feedback, modules can adjust their power allocation dynamically, ensuring that power margins are utilized efficiently to improve performance while maintaining compliance with RF exposure limits.

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS12634839B2Method for adjusting transmitting power ratio of radio module and associated radio module

Publication Date: 2026.05.19 MEDIATEK INC

AI summary

A method for adjusting a transmitting (TX) power ratio of a radio module includes: mapping a radiofrequency (RF) exposure limit to a TX power limit; interacting with at least one other radio module for adjusting the TX power ratio, to obtain an adjusted TX power ratio; and adjusting the TX power limit according to the adjusted TX power ratio, to generate an adjusted TX power limit of the radio module.