Wireless Power Authentication During Charging Handshake
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless power transfer systems lack a reliable method for authenticating devices, which can lead to safety risks due to non-authorized products being used.
Innovation Solution
A method and device for performing authentication in a wireless power transfer system, where a target device is authenticated by receiving a packet indicating support for authentication, transmitting an authentication request, and confirming the authentication based on a certificate response.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If wireless power transfer is implemented without authentication, then ease of operation is improved, but reliability deteriorates due to safety risks from non-authorized products
Solution Approach 1:
The patent implements authentication procedures before wireless power transfer begins. The transmitting device and receiving device exchange authentication packets and verify certificates in advance, ensuring that only authorized devices can engage in power transfer. This preliminary authentication action prevents unauthorized devices from causing safety issues while maintaining smooth operation for legitimate devices.
2Reliability
If authentication procedures are added to wireless power transfer, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent employs universal authentication protocols and certificate structures that can be applied across different wireless power transfer scenarios and device types. The authentication mechanism uses standardized packet formats and certificate verification processes that work universally, reducing the need for device-specific complex authentication logic and making the system scalable.
3Stability of the object's composition
If mutual authentication is performed between transmitting and receiving devices, then stability is improved during high-power charging, but loss of time increases due to authentication overhead
Solution Approach 1:
The patent performs mutual authentication between transmitting and receiving devices before initiating high-power wireless charging. Both devices exchange authentication packets and verify each other's certificates in advance, ensuring that only authorized devices can engage in power transfer. This preliminary authentication action prevents unauthorized devices from causing safety issues while maintaining smooth operation for legitimate devices.
Solution Approach 2:
The authentication process includes feedback mechanisms where devices exchange authentication status information and adjust their interaction accordingly. The transmitting device receives authentication results from the receiving device and uses this feedback to determine whether to proceed with power transfer, ensuring stable and reliable operation.
Data Source
AI summary
A method in a wireless power transfer system can include, in response to a digital ping initiated by a wireless power transmitter, transmitting to the wireless power transmitter during a ping phase, a response signal. The method can further include transmitting, to the wireless power transmitter during a configuration phase, a configuration packet including first control information related to whether a wireless power receiver supports an authentication function to authenticate the wireless power transmitter; receiving, from the wireless power transmitter during a negotiation phase, a capability packet including second control information and a potential power value of the wireless power transmitter; and transmitting, to the wireless power transmitter during a power transfer phase, an authentication request message.