Wireless Charging Terminal Feedback for Interference-Aware Power Control

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Solution Overview

Problem

The challenge in wireless energy charging is the low transmission efficiency, which can lead to interference with coexisting wireless communication systems, and the lack of clarity in reporting feedback information related to the energy charge state and communication state.

Innovation Solution

A terminal equipped with a reception unit to receive energy charge indications, an energy reception unit to receive wireless energy, a control unit to measure the state, and a transmission unit to report this state to the base station, enabling efficient feedback information reporting.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If higher transmission power is used to compensate for low transmission efficiency in wireless energy charge, then energy charge quality is improved, but interference with coexisting wireless communication systems increases

Engineering Contradiction:
Improveenergy charge qualityVSAvoidinterference with wireless communication
Core Design Contradiction:
ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The patent implements a feedback mechanism where the terminal measures the state of wireless energy charge and transmits this information back to the base station. The base station uses this feedback to dynamically adjust transmission parameters, optimizing energy charge quality while minimizing interference with coexisting communication systems through adaptive control.

Inventive Principle:
Principle #23Feedback

2Reliability

If detailed feedback information reporting is implemented for wireless energy charge state, then energy charge control quality is improved, but device complexity increases

Engineering Contradiction:
Improveenergy charge control qualityVSAvoidfeedback reporting complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The patent reuses existing communication protocols and channels for feedback reporting, making the feedback mechanism multi-functional by serving both energy charge monitoring and communication coordination purposes. This approach improves control quality without proportionally increasing device complexity, as the same infrastructure handles multiple functions.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

Enables efficient reporting of wireless energy charge feedback, allowing the base station to appropriately control subsequent energy charge operations and minimize interference with coexisting systems.

Implementation Method 1

an energy reception unit configured to receive wireless energy charge, based on the indication related to energy charge

Methodology Applied
Scientific EffectElectromagnetic Induction: Electromagnetic Induction

Data Source

PatentEP4686269A1Terminal and power supply method
Publication Date: 2026.01.28 NTT DOCOMO INC
  • EP4686269A1 patent drawingFigure 1~2
  • EP4686269A1 patent drawingFigure 3
  • EP4686269A1 patent drawingFigure 4

AI summary

A terminal includes: a reception unit configured to receive an indication related to energy charge from a base station; an energy reception unit configured to receive wireless energy charge, based on the indication related to energy charge; a control unit configured to measure a state of the wireless energy charge; and a transmission unit configured to transmit information related to the state of the wireless energy charge to the base station.