Wireless Power Discovery via BLE Out-of-Band Communication
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Solution Overview
Problem
Existing wireless power transfer systems face limitations in quick discovery, service connection, location-based services, and power availability due to the inefficiencies of in-band communication, necessitating the development of an out-of-band communication method using Bluetooth Low Energy (BLE) for faster and more reliable information exchange.
Innovation Solution
A method and apparatus for wireless power transfer that employs an out-of-band (OOB) BLE communication system, including an OOB module for signal transmission and reception, and an in-band module for power transfer, with a processor controlling both to facilitate quick discovery, service connection, and location-based services by receiving advertisement data and updating connection parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If in-band communication is used for wireless power transfer, then power transfer can be established, but data transmission speed and capacity are limited
Solution Approach 1:
The communication function is segmented into two separate channels: in-band communication for power transfer control and out-of-band BLE communication for data exchange. This segmentation allows each channel to optimize for its specific purpose, resolving the contradiction between reliable power transfer establishment and high-speed data transmission.
Solution Approach 2:
BLE out-of-band communication acts as an intermediary channel that handles data transmission tasks, freeing the in-band power communication channel from data processing burdens. This intermediary approach enables simultaneous optimization of both power transfer reliability and data transmission speed.
2Reliability
If in-band communication is used, then power transfer control is maintained, but service discovery and connection setup are slow
Solution Approach 1:
Service discovery, advertisement, and connection setup are performed in advance through BLE out-of-band communication before power transfer begins. This preliminary action through the faster BLE channel eliminates delays during the actual power transfer process, while in-band communication maintains reliable power control.
3Productivity
If out-of-band BLE communication is introduced, then data transmission speed improves, but system complexity increases
Solution Approach 1:
The BLE out-of-band communication module serves multiple functions including service discovery, advertisement, connection setup, and data transmission. This multi-functionality consolidates various communication tasks into a single universal channel, improving data transmission speed while minimizing the increase in overall system complexity.
4Adaptability or versatility
If connection parameters are updated during power transfer, then adaptability improves, but connection stability may be affected
Solution Approach 1:
Connection parameters are made dynamic and can be updated during power transfer through BLE out-of-band communication. This allows the system to adapt to changing conditions (power levels, device movement, environmental factors) while maintaining connection stability through coordinated updates between the BLE control channel and in-band power channel.
Data Source
AI summary
The present disclosure relates to a method, device and computer program for communicating information relating to wireless power transmission, and a recording medium thereof. A quick discovery method by means of out-of-band (OOB) in a wireless power transmission system according to an embodiment of the present disclosure can comprise the steps in which: a power transmitter (PTX) receives one or more advertisement data items from a power receiver (PRX) in the OOB; the PTX obtains a first service or characteristic of the PRX in the OOB on the basis of the advertisement data items; power transmission from the PTX to the PRX is initiated in-band on the basis of the first service or characteristic; and the PTX obtains a second service or characteristic of the PRX in the OOB after the power transmission has been initiated.