Terminal Beam Selection for Efficient Wireless Energy Charging

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Solution Overview

Problem

The details of beamforming control procedures for wireless energy charge in wireless communication systems are unclear, necessitating higher transmission power to compensate for low transmission efficiency.

Innovation Solution

A terminal equipped with a reception unit to receive beam indications from a base station, a control unit to determine reception beams for energy charge, and an energy reception unit to apply these beams for wireless energy charge.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of energy

If higher transmission power is used to compensate for low transmission efficiency in wireless energy charge, then energy transmission efficiency is improved, but device complexity and control difficulty increase

Engineering Contradiction:
Improvetransmission efficiencyVSAvoidcontrol procedure complexity
Core Design Contradiction:
Loss of energyVSDevice complexity

Solution Approach 1:

The base station performs beamforming control procedures in advance to establish optimal beams for wireless energy charge before actual energy transmission begins. This preliminary beam establishment simplifies the control procedure during energy transmission by avoiding real-time complex adjustments.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The patent introduces beamforming as an intermediary technique between the base station and terminal for wireless energy charge. The beamforming mechanism mediates the energy transmission process, enabling efficient energy delivery without requiring direct complex control between the energy charging device and terminal.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Productivity

If beamforming is applied to wireless energy charge, then transmission efficiency is improved, but control procedure details become more complex

Engineering Contradiction:
Improveenergy charge efficiencyVSAvoidbeamforming control complexity
Core Design Contradiction:
ProductivityVSDevice complexity

Solution Approach 1:

The beamforming control procedure is segmented into distinct phases: beam indication from base station to terminal, beam determination by terminal, and beam application for energy reception. This segmentation simplifies the overall control complexity by breaking down the beamforming process into manageable, sequential steps.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The base station provides beam indications to the terminal, and the terminal determines and applies reception beams based on these indications. This feedback mechanism ensures that the beamforming control is coordinated and optimized for wireless energy charge while maintaining manageable complexity through structured information exchange.

Inventive Principle:
Principle #23Feedback

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 controlled wireless energy charge through beamforming, enhancing transmission efficiency and flexibility in wireless communication systems.

Implementation Method 1

beamforming is expected to be applied

Methodology Applied
Scientific EffectBeamforming:

Implementation Method 2

receive wireless energy charge from an energy charging device

Methodology Applied
Scientific EffectElectromagnetic energy transmission: Electromagnetic Induction

Data Source

PatentEP4683244A1Terminal and power supply method
Publication Date: 2026.01.21 NTT DOCOMO INC
  • EP4683244A1 patent drawingFigure 1~2
  • EP4683244A1 patent drawingFigure 3
  • EP4683244A1 patent drawingFigure 4

AI summary

A terminal includes: a reception unit configured to receive an indication related to a beam from a base station; a control unit configured to determine a reception beam related to energy charge, based on the indication related to the beam; and an energy reception unit configured to receive wireless energy charge from an energy charging device by applying the reception beam.