Out-of-Band Broadcast Messaging for Wireless Charging Devices
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Solution Overview
Problem
The narrow working frequency band in wireless charging technologies limits the amount of information that can be communicated, making it difficult to meet more extensive communication requirements.
Innovation Solution
A method and apparatus for transmitting information using out-of-band communication, where a broadcast message is transmitted by a power transmitting device within a non-working frequency band to carry more information, including device identifiers, authentication information, charging state information, and DTX information, allowing for efficient communication between power transmitting devices and receiving devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If wireless charging communication uses the working frequency band (narrow band around 124 kHz), then the wireless charging function is maintained, but the amount of information that can be communicated is limited
Solution Approach 1:
The patent introduces out-of-band communication as a new dimension for information transmission, separate from the working frequency band. This allows the system to transmit additional information (device identifiers, authentication data, charging state, DTX information) through a different communication channel, effectively increasing the total information capacity without interfering with the wireless charging function.
2Productivity
If out-of-band communication is introduced to transmit more information, then communication efficiency is improved, but system complexity increases
Solution Approach 1:
The communication system is segmented into two independent parts: in-band communication for wireless charging control and out-of-band communication for additional information exchange. This segmentation allows each subsystem to operate independently with optimized protocols, improving overall communication efficiency while managing complexity through modular design.
Solution Approach 2:
The out-of-band communication channel serves multiple functions simultaneously: transmitting device identifiers, authentication information, charging state updates, and DTX (discontinuous transmission) control data. This multi-functionality consolidates what would otherwise require multiple separate communication mechanisms, improving efficiency without proportionally increasing complexity.
Data Source
AI summary
A method for transmitting information includes transmitting a broadcast message in a manner of out-of-band communication by a first power transmitting device. The broadcast message is configured to indicate related information of a first power transmitting device to a power receiving device and/or other power transmitting devices.