Wireless Power Receiver Handover Between In-Band and Out-Band Communication
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Solution Overview
Problem
Conventional wireless power transmission systems face limitations in communication speed and reliability due to the use of 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 various communication protocols.
Innovation Solution
A wireless power transmission system that includes a wireless power transmitter and receiver capable of heterogeneous communication, using a combined signal strength packet to switch between in-band and out-band communication methods, allowing for the selection of various communication protocols and enabling handover between different communication methods to support diverse applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ASK or FSK is used for communication in wireless power transmission, then magnetic coupling can be established, but transmission speed is limited to several kHz and reliability deteriorates due to vulnerability to electronic and magnetic disturbances
Solution Approach 1:
The patent changes the communication parameter from traditional ASK/FSK modulation to utilizing the load modulation capability of the power receiver, enabling communication at higher data rates while maintaining reliability through the power transmission channel itself
Solution Approach 2:
The patent makes the power transmission system multi-functional by enabling it to perform both power transmission and high-speed communication through the same magnetic coupling channel, eliminating the need for separate communication hardware
2Adaptability or versatility
If ASK or FSK is used for communication, then wireless power transmission can be implemented, but the system cannot support various communication protocols required for different applications
Solution Approach 1:
The patent creates a universal communication framework that can accommodate multiple communication protocols (NB-IoT, LTE-M, Wi-Fi, Bluetooth, etc.) within the wireless power transmission system, allowing the same infrastructure to support diverse applications while maintaining reliable power transfer
3Quantity of substance
If conventional communication methods are used, then simple wireless charging is possible, but the system cannot support middle-level power transmission or large-capacity data transmission such as authentication
Solution Approach 1:
The patent changes the data transmission parameter by utilizing the load modulation capability of the power receiver during the power transmission process, enabling high-capacity data transmission including authentication information without adding complex separate communication hardware
Solution Approach 2:
The patent merges the power transmission function with the data communication function into a single integrated system, where the same magnetic coupling infrastructure carries both power and high-capacity data, reducing overall system complexity while increasing data capacity
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 reliable and efficient communication in wireless power transmission systems by allowing the selection of suitable communication protocols, improving data transmission speed and reliability, and supporting various applications by switching between in-band and out-band communication based on signal strength and protocol compatibility.
Implementation Method 1
a power pick-up unit configured to receive a digital ping signal or wireless power from a wireless power transmitter through magnetic coupling with the wireless power transmitter at an operating frequency and to convert an alternating current (AC) signal generated by the wireless power into a direct current (DC) signal
Data Source
AI summary
The present invention relates to an apparatus and a method for supporting heterogeneous communication in a wireless power transmission system. The present disclosure discloses a wireless power receiver comprising: a power pickup unit configured to receive, from a wireless power transmitter, a digital ping signal or wireless power by magnetically coupling with the wireless power transmitter at an operating frequency, and to convert an alternating current signal generated by the wireless power into a direct current signal; a communication/control unit configured to receive the direct current signal from the power pickup unit, and to perform at least one of an in-band communication using the operating frequency and an out-band communication using a frequency other than the operating frequency; and a load configured to receive the direct current signal from the power pickup unit. As a heterogeneous communication protocol can be selected at an early stage of power transmission between the wireless power transmitter and the wireless power receiver, it is possible to support various applications of wireless power transmission.