Wireless Power Feeding NFC Mode Retention During Re-Authentication
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Solution Overview
Problem
In wireless power transmission systems using NFC communication, the communication mode often changes during re-authentication, which is undesirable and requires NFC authentication to be performed for each communication, disrupting the established mode.
Innovation Solution
A power supply apparatus that holds information about the communication mode established during initial authentication and controls the communication to maintain that mode during subsequent authentications, preventing changes by not replying to carrier signals or returning error replies during a predetermined period.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If NFC authentication is performed for each communication reconnection, then communication reliability is improved, but communication mode stability deteriorates
Solution Approach 1:
The system performs NFC authentication and mode determination in advance during initial connection, then stores the determined communication mode information. During reconnection, the stored mode information is reused without requiring re-authentication, thus maintaining mode stability while ensuring initial reliability.
Solution Approach 2:
The communication mode information determined during initial authentication is copied and stored in memory. During reconnection events, this copied mode information is retrieved and applied, avoiding the need to re-determine the mode and preventing mode changes.
2Stability of the object's composition
If communication mode is fixed to prevent changes, then mode stability is improved, but adaptability to different communication scenarios deteriorates
Solution Approach 1:
The appropriate communication mode is determined in advance during initial authentication based on the specific devices and scenarios involved. This pre-determined mode is then consistently applied during reconnections, ensuring both stability and appropriate adaptability to the specific communication scenario.
3Reliability
If NFC authentication is performed repeatedly, then security is improved, but communication efficiency deteriorates
Solution Approach 1:
NFC authentication is performed once in advance during initial connection to establish security and determine communication mode. The results are stored and reused during reconnections, eliminating repeated authentication overhead while maintaining security from the initial authentication.
Solution Approach 2:
The authentication results and mode information are copied and stored after initial authentication. During reconnections, this copied information is retrieved and applied directly, avoiding repeated authentication processes and improving communication efficiency while maintaining security.
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
Prevents changes in the communication mode during re-authentication, ensuring consistent communication modes and maintaining established NFC authentication settings.
Implementation Method 1
a power supply apparatus that wirelessly supplies power to an electronic device
Implementation Method 2
NFC (Near Field Communication) communicating means
Data Source
Figure 1
Figure 2
Figure 3A
AI summary
According to the present invention, the communication mode can be prevented from changing when re-authentication is performed. To achieve this, a power supply apparatus that wirelessly supplies power to an electronic device, comprises a communicating unit that contactlessly transmits power and transmits/receives information, a holding unit that holds, when authentication is first performed with an electronic device via the communicating unit, information indicating a communication mode when communication is established with the electronic device, and a controlling unit that controls the communicating unit so as to perform communication in a communication mode based on the information held in the holding unit, when a second authentication is performed with the electronic device via the communicating unit.