Wireless Power Authentication Timing for Stable Message Exchange
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Solution Overview
Problem
Existing wireless power transfer systems face challenges in maintaining communication stability, particularly during the authentication phase, which can lead to communication loss and instability.
Innovation Solution
A method and apparatus for transmitting a first application message to a wireless power transmitter and receiving a second application message in response, where the wireless power receiver completes receiving the second message within a specific time interval, starting from the transmission of the first message, to prevent communication loss and stabilize authentication messages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wireless communication is performed during power transfer phase, then power transmission functionality is achieved, but communication stability deteriorates due to authentication message loss
Solution Approach 1:
The patent applies preliminary action by performing authentication before the power transfer phase. The receiver and transmitter complete mutual authentication during the configuration phase, establishing secure communication credentials before power transfer begins. This ensures that authentication messages are not lost during the power transfer phase, as the authentication is already completed. The time requirement is set to allow sufficient time for this preliminary authentication to complete before power transfer starts.
Solution Approach 2:
The patent implements feedback by setting a specific time requirement for the receiver to complete receiving the second application message (authentication response) and feed back confirmation to the transmitter. The transmitter waits for this feedback within the specified time interval, and only proceeds with power transfer when confirmation is received. This feedback mechanism ensures reliable authentication message exchange and prevents communication instability.
2Reliability
If authentication messages are transmitted during power transfer phase, then secure power transmission is achieved, but communication loss increases due to interference
Solution Approach 1:
The patent performs authentication as a preliminary action before the power transfer phase begins. All authentication messages (first application message, second application message, and authentication response) are exchanged during the configuration phase, completing the authentication process before power transfer starts. This eliminates interference between authentication messages and power transfer signals, preventing communication loss while maintaining authentication reliability.
Solution Approach 2:
The patent segments the communication process into distinct phases: configuration phase for authentication and power transfer phase for power transmission. By separating authentication messages from power transfer operations in time, the patent avoids interference between the two functions. The configuration phase handles all authentication messaging, while the power transfer phase handles only power transmission, ensuring both authentication reliability and communication stability.
3Reliability
If time requirement is extended for receiving authentication messages, then communication stability improves, but power transfer efficiency decreases
Solution Approach 1:
The patent optimizes the time requirement parameter to achieve the best balance between communication stability and power transfer efficiency. The time requirement is set to a specific value that is sufficient for reliable authentication message reception but not excessively long. This optimized parameter allows the receiver to complete receiving the second application message and send confirmation in time, ensuring communication stability while minimizing delay before power transfer begins, thus maintaining high power transfer efficiency.
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
This approach effectively prevents communication loss and resolves communication instability during the authentication phase, ensuring reliable data exchange between the wireless power transmitter and receiver.
Implementation Method 1
The magnetic induction method corresponds to a method transmitting power by using electric currents that are induced to the coil of the receiver by a magnetic field, which is generated from a coil battery cell of the transmitter, in accordance with an electromagnetic coupling between a transmitting coil and a receiving coil.
Implementation Method 2
the magnetic resonance method is different from the magnetic induction method in that energy is transmitted due to a concentration of magnetic fields on both a transmitting end and a receiving end, which is caused by the generated resonance.
Data Source
AI summary
Provided in the present disclosure is a method for receiving wireless power from a wireless power transmitter by a wireless power receiver in a wireless power transmission system, and a device using same, the method including: entering a power transmission phase associated with wireless power reception; transmitting a first application message to the wireless power transmitter in the power transmission phase; and receiving a second application message, which is a response to the first application message, from the wireless power transmitter in the power transmission phase, wherein the wireless power receiver finishes receiving the second application message within a specific time interval, and a start point of the specific time interval is a start point of the first application message.