Wireless Charging Handover Between In-Band and Out-Band Links
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless power transfer systems face challenges in efficiently managing communication connections between in-band and out-band communication modes, particularly in maintaining reliable communication and preventing wireless charging interruptions.
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 communication modes, and out-band reconnection procedures to ensure continuous and secure charging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If in-band communication is used for wireless power transfer, then communication can be established within the power transfer channel, but communication reliability deteriorates when handover to out-band is required
Solution Approach 1:
The system dynamically switches between in-band and out-band communication modes based on operational requirements. The handover mechanism allows the communication channel to transition from the power transfer band to an independent out-band when needed, maintaining adaptability while ensuring reliability through dedicated reconnection procedures that preserve connection state information during mode transitions.
Solution Approach 2:
The out-band communication serves as an intermediary channel that bridges the gap when in-band communication becomes insufficient. By establishing a separate communication path with preserved connection state information, the system can maintain reliable communication even when the primary in-band channel needs to be abandoned or experiences failures.
2Reliability
If handover from in-band to out-band communication is implemented, then communication reliability can be improved, but system complexity increases due to additional connection management
Solution Approach 1:
The system performs preliminary actions by maintaining connection state information in the power transfer contract before handover occurs. This pre-prepared information includes out-band support capability and connection state, which are established during the in-band phase. When handover is needed, this预先 stored information enables immediate reconnection without requiring full re-initialization, thus reducing the operational complexity of managing the handover process.
Solution Approach 2:
The handover mechanism is designed to be self-sufficient by preserving all necessary connection state information within the power transfer contract itself. The system does not require external assistance or complex coordination protocols because the contract contains embedded information about out-band support and connection state, enabling autonomous reconnection and simplifying the overall management complexity.
3Reliability
If out-band reconnection requires initialization to selection phase, then communication can be re-established, but charging time increases due to complete re-initialization
Solution Approach 1:
Connection state information is preliminarily preserved in the power transfer contract during the in-band communication phase. This includes information about out-band support capability and the current connection state. When handover to out-band is required, this pre-stored information allows the system to resume communication without undergoing complete re-initialization, significantly reducing the time loss during reconnection while maintaining reliable reconnection capability.
4Reliability
If security measures are implemented using random MAC addresses, then communication security is improved, but device identification complexity increases
Solution Approach 1:
The system enhances security by dynamically changing the MAC address parameter to a random value during in-band communication. This parameter change ensures that each communication session uses a unique identifier, preventing replay attacks and enhancing security. The complexity is managed by integrating this randomization directly into the existing communication protocol without requiring separate identification mechanisms, thus maintaining security improvements while minimizing additional complexity.
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
The proposed solution enables adaptive control of communication connections, enhances security through random MAC addresses, improves communication reliability, and prevents wireless charging interruptions by enabling fast and repeatable reconnection attempts in out-band mode.
Implementation Method 1
a power transfer method based on magnetic coupling... a 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
a 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.