Wireless Power Communication Handover Using Random MAC Reconnection
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Solution Overview
Problem
Current wireless power transfer systems face challenges in controlling communication connections between in-band and out-band modes, particularly in maintaining reliable communication and preventing interruptions during handover and reconnection, especially when power demand or communication quality changes.
Innovation Solution
A method for controlling communication connections in a wireless power transfer system that supports both in-band and out-band communication, involving the creation of a power transfer contract, handover between modes, and periodic reconnection attempts using a random MAC address, allowing for adaptive communication based on power demand and quality changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the system uses in-band communication for power transfer, then power transmission efficiency is improved, but communication reliability deteriorates when power demand or communication quality changes
Solution Approach 1:
The communication channel is segmented into two independent paths: in-band communication for power transfer and out-band communication for control signals. This segmentation allows each channel to be optimized for its specific function, with in-band handling power efficiently while out-band ensures communication reliability during handovers and reconnections.
Solution Approach 2:
An out-band communication channel acts as an intermediary for control signals during in-band communication disruptions. When in-band communication quality degrades or power demand changes, the out-band channel serves as a reliable mediator to maintain control signal transmission and enable seamless handover between communication modes.
2Adaptability or versatility
If the system performs handover between in-band and out-band modes, then communication adaptability is improved, but device complexity increases
Solution Approach 1:
The wireless power transfer system is designed with multi-functionality to support both in-band and out-band communication modes within a single device architecture. This universal design allows the system to adapt to different communication conditions without requiring separate dedicated systems, managing complexity through integrated multi-mode support.
Solution Approach 2:
The system implements dynamic handover capability that automatically switches between in-band and out-band communication modes based on real-time power demand and communication quality conditions. This dynamic adaptation allows the system to optimize performance while managing complexity through automated mode selection rather than manual configuration.
3Speed
If the system uses fixed MAC address for out-band reconnection, then reconnection speed is improved, but security deteriorates
Solution Approach 1:
The system performs preliminary actions by pre-establishing out-band communication connections and maintaining connection state information during the power transfer process. This preliminary setup enables faster reconnection speeds when needed, while security is maintained through the use of random MAC addresses generated in advance for each charging session.
Solution Approach 2:
The system changes the MAC address parameter dynamically by using random MAC addresses instead of fixed ones for out-band communication. This parameter change enhances security by preventing unauthorized devices from predicting or impersonating legitimate devices, while reconnection speed is maintained through the preservation of connection state information that enables rapid re-establishment of authenticated sessions.
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
This approach enhances communication reliability and prevents interruptions by enabling seamless handover and reconnection between in-band and out-band modes, improving charging efficiency and security.
Implementation Method 1
a power transfer method based on magnetic coupling... The magnetic induction method is a method of transferring energy based on a current induced in the coil of a receiver due to a magnetic field generated by the coil battery cell of the transmitter according to electromagnetic coupling between the coil of the transmitter and the coil of the receiver
Implementation Method 2
The magnetic induction method is a method of transferring energy based on a current induced in the coil of a receiver due to a magnetic field generated by the coil battery cell of the transmitter
Implementation Method 3
The magnetic resonance method is similar to the magnetic induction method in that the magnetic field is used. However, the magnetic resonance method is different from the magnetic induction method in that resonance occurs when a specific resonant frequency is applied to the coil of the transmitter and the coil of the receiver
Data Source
AI summary
The present invention relates to wireless power transmission. A method for controlling a communication connection for a wireless charging device supporting in-band communication and out-band communication, according to an embodiment of the present invention, may comprise: a step of receiving a first packet from a device through in-band communication; a step of generating a power transmission contract on the basis of the first packet; a step of performing an out-band communication connection on the basis of the power transmission contract; a step of controlling power by using out-band communication when the out-band communication connection is successful.