Wireless Power Receiver Authentication via Dual Communication Links
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Solution Overview
Problem
Existing wireless power transmission systems face delays in device authentication due to the out-of-band communication function of the power receiving apparatus being disabled when placed on the power transmitting apparatus, necessitating the use of in-band communication, which is slower.
Innovation Solution
Implementing a power receiving apparatus with dual communication units - a first unit for in-band communication and a second unit for out-of-band communication, such as Bluetooth Low Energy (BLE), allowing the system to determine the capability of the power transmitting apparatus for out-of-band communication and enabling it if necessary, thereby facilitating faster device authentication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If out-of-band communication is used for device authentication, then authentication speed is improved, but the communication function may be disabled when the power receiving apparatus is placed on the power transmitting apparatus
Solution Approach 1:
The system dynamically switches between out-of-band communication (when available and faster) and in-band communication (when out-of-band is disabled or unavailable). The determination unit checks the availability of out-of-band communication and the execution unit activates it if disabled, creating a flexible communication system that adapts to different operational states.
2Ease of operation
If in-band communication is used for device authentication, then communication availability is ensured, but authentication time is increased
Solution Approach 1:
The system introduces an intermediary check mechanism where the determination unit first assesses whether out-of-band communication is available before committing to a communication method. This intermediary step allows the system to prefer the faster out-of-band communication when possible while falling back to in-band communication when necessary, balancing speed and availability.
3Speed
If the power receiving apparatus always uses out-of-band communication, then authentication speed is maximized, but device complexity increases due to dual communication units
Solution Approach 1:
The power receiving apparatus is designed with multi-functionality, incorporating both out-of-band and in-band communication capabilities. The determination unit and execution unit work together to select the appropriate communication method based on availability, making the system universally adaptable to different communication scenarios without requiring constant use of the more complex out-of-band system.
Data Source
AI summary
A power receiving apparatus for receiving power transmitted by wireless power transmission from a power transmitting apparatus, comprises a first communication unit for communicating with the power transmitting apparatus, and a second communication unit for performing communication at a speed higher than the first communication unit. The power receiving apparatus determines, by communication via the first communication unit, whether the power transmitting apparatus has a function of transmitting/receiving, via the second communication unit, information for device authentication with the power transmitting apparatus, and enables the second communication unit to execute transmission/reception of the information for the device authentication with the power transmitting apparatus via the second communication unit if it is determined that the power transmitting apparatus has the function and the second communication unit is in a disabled state.