Wireless Power Authentication via ADT Packet Retry Handshake
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing wireless power transfer systems lack a reliable method for authenticating devices, which can lead to safety risks due to the presence of non-authorized products that do not adhere to technical standards, potentially causing overheating or other safety issues during charging.
Innovation Solution
A method and device for performing authentication in a wireless power transfer system, involving the exchange of authentication request and response messages using an auxiliary data transport (ADT) protocol, where the target device's support for authentication is indicated through capability or configuration packets, and certificates are used to confirm the authenticity of wireless power transmitting and receiving devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If wireless power transfer is performed without device authentication, then charging convenience is improved, but safety and reliability deteriorate due to non-authorized products causing overheating or other safety issues
Solution Approach 1:
The patent implements authentication exchange between wireless power transmitting and receiving devices before power transfer begins. The transmitting device sends authentication requests and receives verification responses, ensuring both devices are genuine and compliant with technical standards prior to charging, thus preventing safety issues while maintaining convenience
2Reliability
If device authentication is implemented in wireless power transfer system, then safety and reliability are improved, but system complexity increases due to additional authentication protocols and message exchanges
Solution Approach 1:
The patent utilizes existing communication channels and message formats within the wireless power transfer protocol to carry authentication information. Authentication requests, responses, and verification data are embedded in standard control messages, allowing the system to perform both power control and authentication functions through the same communication infrastructure, thereby avoiding significant increases in system complexity
Data Source
AI summary
A wireless power transmitter including a power converter configured to transfer a wireless power to a wireless power receiver; and a communicator/controller configured to control the wireless power, wherein the wireless power transmitter is configured to transmit, to the wireless power receiver, a bit pattern requesting permission to communicate; receive, from the wireless power receiver, a response packet granting the permission in response to the bit pattern; transmit, to the wireless power receiver, a first auxiliary data transport (ADT) data packet after receiving the response packet; receive, from the wireless power receiver, a not acknowledge (NAK) in response to the first ADT data packet; and transmit, to the wireless power receiver, a second ADT data packet after receiving the NAK, wherein a value of a header for the first ADT data packet is same as a value of a header for the second ADT data packet.