Wireless Power Data Timing to Prevent CE Packet Collisions
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Solution Overview
Problem
Existing wireless power transfer systems face challenges in preventing data transmission collisions between wireless power transmitters and receivers, particularly when multiple devices are involved, which can lead to compatibility issues and potential damage due to overvoltage.
Innovation Solution
A method and apparatus that involve receiving control error (CE) packets from a wireless power receiver, determining the interval between packets, and transmitting data packet information based on this interval, using a protocol for coordinating communication between FSK/ASK to reduce the likelihood of communication collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If data transmission is performed in wireless power transfer system, then power transfer capability is improved, but data transmission collision occurs between transmitter and receiver
Solution Approach 1:
The patent implements periodic action by using time-division multiplexing where data transmission and power transfer occur in alternating time slots. The transmitter sends data packets during designated time intervals and switches to power transfer mode during other intervals, preventing simultaneous transmission and eliminating data collisions while maintaining both power transfer capability and data transmission reliability
Solution Approach 2:
The patent introduces an intermediary protocol layer that mediates between data transmission and power transfer operations. This protocol coordinates the timing and sequencing of communications, ensuring that data packets are transmitted only when the power transfer channel is idle, thus preventing collisions while enabling both functions to operate effectively
2Adaptability or versatility
If multiple devices are involved in wireless power transfer, then system versatility is improved, but data transmission collision probability increases
Solution Approach 1:
The patent applies segmentation by dividing the wireless medium into dedicated time slots and frequency channels for different devices. Each device is assigned specific transmission windows and communication channels, preventing simultaneous transmissions that would cause collisions while allowing multiple devices to operate within the same system
Solution Approach 2:
The patent implements preliminary action through a registration and scheduling phase before actual power transfer begins. Devices register with the system and receive assigned time slots and channels in advance, so when power transfer operations commence, all devices already have coordinated transmission schedules that prevent collisions
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 reduces the possibility of communication collisions, ensuring stable and safe power transfer by maintaining compatibility between wireless power transmitters and receivers, thereby preventing damage and enhancing user experience.
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 similar to the magnetic induction method in that is uses a magnetic field. However, 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
The present disclosure relates to a method for transmitting data packet information, wherein the method is performed by a wireless power transmitter in a wireless power transmission system, and comprises the steps of: entering a power transfer phase; receiving a plurality of control error (CE) packets from a wireless power receiver during the power transfer phase; determining the intervals between the plurality of CE packets; and transmitting the data packet information to the wireless power receiver during the power transfer phase on the basis of the intervals, wherein the length of the data packet information is determined on the basis of the length of the intervals.