Wireless Power Out-of-Band Communication for Stable Negotiation
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Solution Overview
Problem
Existing wireless power transfer systems face issues with communication confusion and conflicts between wireless power transmitters and receivers, particularly in maintaining compatibility and ensuring stable power transfer across different power classes and profiles.
Innovation Solution
Implementing out-of-band communication methods, such as Bluetooth Low Energy (BLE), to facilitate clear negotiation and configuration phases between wireless power transmitters and receivers, ensuring stable power transfer and compatibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If in-band communication is used for negotiation between wireless power transmitter and receiver, then power transfer can be established, but communication confusion and conflicts occur between devices
Solution Approach 1:
The communication channel is segmented into two separate bands: in-band communication for power transfer and out-of-band communication for negotiation and control. This segmentation prevents communication confusion by dedicating separate channels for different functions, allowing the wireless power transmitter and receiver to negotiate parameters without interfering with power transfer signals.
Solution Approach 2:
Out-of-band communication acts as an intermediary channel that facilitates negotiation between the wireless power transmitter and receiver before power transfer begins. This intermediary communication path allows devices to exchange control information, negotiate power parameters, and establish connections without causing conflicts in the power transfer channel.
2Adaptability or versatility
If wireless power transfer system supports multiple power classes and profiles, then versatility is improved, but communication compatibility and stability deteriorate
Solution Approach 1:
The out-of-band communication channel serves as a universal negotiation path that works across all power classes and profiles (PC1, PC2, PC3, EPP, BPP). This multi-functional communication path enables the wireless power transmitter and receiver to negotiate and adapt to different power transfer requirements while maintaining stable communication regardless of the specific power class or profile being used.
Data Source
AI summary
The present disclosure provides a method for wireless power transmission by a wireless power transmitter in a wireless power transmission system, and a device using same, the method comprising: receiving a configuration packet from a wireless power receiver in a configuration phase, wherein the configuration packet related to the wireless power receiver includes information about whether a function of out-of-band communication is supported or not; and transmitting or receiving a specific packet related to the out-of-band communication in a negotiation phase, wherein the specific packet includes information for reporting an operation executed in the out-of-band communication.