Wireless Power Transfer Handover Using Random BLE Addresses
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Solution Overview
Problem
Conventional wireless power transmission systems face limitations in communication methods, particularly with amplitude shift keying (ASK) and frequency shift keying (FSK), which are vulnerable to electronic and magnetic disturbances, making them unsuitable for middle-level power transmission and large-capacity data transmission, such as authentication, and lack the ability to support heterogeneous communication protocols.
Innovation Solution
A wireless power transmission system that includes a power pick-up circuit and a communication/control circuit capable of performing in-band and out-of-band communication, using random address packets to facilitate handover between different communication methods, ensuring secure and efficient communication by renewing addresses and using a link layer for advertising and initiating connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ASK or FSK communication methods are used in wireless power transmission, then communication can be established between transmitter and receiver, but the transmission speed is limited to several kHz and the system is vulnerable to electronic and magnetic disturbances
Solution Approach 1:
The communication system is segmented into multiple independent communication modules, each supporting different communication protocols (magnetic field-based ASK/FSK, electromagnetic field-based WiFi/BLE, RF-based communication). This allows the system to select appropriate communication methods based on specific application requirements, thereby achieving both high reliability for power control and high speed for data transmission without being constrained by the limitations of a single communication method.
Solution Approach 2:
The wireless power transmission system is designed with multi-functional communication capabilities, incorporating universal communication interfaces that support heterogeneous protocols. The system can simultaneously perform power transmission using magnetic coupling while establishing independent data communication channels through electromagnetic fields or RF, enabling it to function as both a power transmission system and a data communication system, thus resolving the contradiction between reliability and speed.
2Power
If conventional magnetic coupling communication is used, then power transmission is achieved, but the system cannot support heterogeneous communication protocols or large-capacity data transmission such as authentication
Solution Approach 1:
An intermediary communication control module is introduced that acts as a bridge between the magnetic coupling power transmission channel and multiple heterogeneous communication protocols. This intermediary module manages different communication protocols (WiFi, BLE, RF) independently while coordinating with the power transmission process, allowing the system to maintain stable power transmission while supporting diverse communication protocols and large-capacity data transmission for authentication and other applications.
Solution Approach 2:
The system transitions from relying solely on the magnetic field dimension for both power and communication to utilizing multiple dimensional channels: magnetic field for power transmission, electromagnetic field for mid-range communication, and RF for long-range or high-speed data transmission. This dimensional expansion allows simultaneous power transmission and heterogeneous communication without interference, resolving the limitation of protocol adaptability.
3Ease of manufacture
If a single communication protocol is used for power transmission, then the system is simple to implement, but it cannot support various applications requiring different communication methods
Solution Approach 1:
The communication system is designed with dynamic protocol selection capability, where the communication control module can automatically select or switch between different communication protocols based on application requirements, device capabilities, and environmental conditions. This dynamic adaptability allows the system to maintain simplicity for basic power transmission while providing access to multiple protocols when advanced applications are needed, effectively resolving the contradiction between implementation simplicity and application versatility.
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 system enhances security and reliability by preventing cross-reference and reinforcing security, enabling safer BLE connections and stable power transfer across various devices and applications.
Implementation Method 1
a power pick-up circuit being configured to receive wireless power from a power transferring device via magnetic coupling with the wireless power transferring device
Data Source
AI summary
The present specification relates to a device and method for supporting heterogeneous communication in a wireless power transfer system. The present specification discloses a wireless power reception device comprising: a power pickup circuit configured to receive, from a wireless power transfer device, wireless power generated on the basis of magnetic coupling in a power transfer phase; and a communication and control circuit configured to transmit, to the wireless power transfer device, a first random address packet including a random address of the wireless power reception device or receive, from the wireless power transfer device, a second random address packet including a random address of the wireless power transfer device via in-band communication. By performing a handover using a random address, cross reference can be prevented and security can be enhanced, and thus a BLE connection in a wireless charging system can be more safely performed.