Wireless Power Receiver BLE Role Switching
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Solution Overview
Problem
Existing wireless power transmission systems face challenges in establishing appropriate connections between power supply and receiving apparatuses due to limitations in Bluetooth Low Energy (BLE) protocols, particularly when the number of connected devices is limited, and when devices cannot switch roles effectively, leading to constraints in wireless power supply initiation.
Innovation Solution
A power receiving apparatus equipped with a detection unit, communication unit, and control unit that dynamically switches between transmission and reception of information based on its state to establish connections with power transmitting apparatuses, allowing role changes between peripheral and central roles depending on battery voltage or received electromagnetic waves.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a power receiving apparatus operates as a central role apparatus in BLE, then it can initiate connections to peripheral devices, but it cannot connect to power transmitting apparatuses that also serve as central role apparatuses
Solution Approach 1:
The power receiving apparatus dynamically switches its BLE role between central and peripheral based on the operational state. When battery voltage is sufficient, it operates as a central role apparatus to initiate connections. When battery voltage is low or during power reception, it switches to peripheral role to receive connections from power transmitting apparatuses. This dynamic role switching resolves the contradiction by adapting the connection mode to the current power state.
Solution Approach 2:
The apparatus changes the BLE role parameter (central/peripheral) based on power conditions. The control unit monitors battery voltage and power reception state, then switches the communication unit's role accordingly. This parameter change allows the apparatus to connect to different types of power transmitting apparatuses under different power conditions, resolving the compatibility issue.
2Adaptability or versatility
If a power receiving apparatus operates as a peripheral role apparatus in BLE, then it can connect to central role power transmitting apparatuses, but it cannot initiate connections and must end existing connections first
Solution Approach 1:
The apparatus dynamically switches its BLE role between central and peripheral based on the operational state. When battery voltage is sufficient, it operates as a central role apparatus to initiate connections. When battery voltage is low or during power reception, it switches to peripheral role to receive connections from power transmitting apparatuses. This dynamic role switching resolves the contradiction by adapting the connection mode to the current power state.
Solution Approach 2:
The apparatus performs preliminary role switching before connection establishment. The control unit determines the appropriate role based on power state and switches to peripheral role in advance, allowing the power transmitting apparatus to initiate the connection without requiring the power receiving apparatus to end existing connections first.
3Device complexity
If the power receiving apparatus limits the number of connected apparatuses, then connection management is simplified, but connection flexibility in various power states is reduced
Solution Approach 1:
The apparatus dynamically switches its BLE role between central and peripheral based on the operational state. When battery voltage is sufficient, it operates as a central role apparatus to initiate connections. When battery voltage is low or during power reception, it switches to peripheral role to receive connections from power transmitting apparatuses. This dynamic role switching resolves the contradiction by adapting the connection mode to the current power state.
Data Source
AI summary
A power receiving apparatus that is capable of communicating with a power transmitting apparatus with wireless power transmission capability, the power receiving apparatus comprises: a detection unit configured to detect a state of the power receiving apparatus; a communication unit configured to, in order to establish connection to other apparatuses including the power transmitting apparatus, transmit information indicating an existence of the power receiving apparatus to the other apparatuses, or receive information indicating an existence of the other apparatuses from the other apparatuses; and a control unit configured to control transmission and reception of the information, wherein in order to enable establishment of connection to the power transmitting apparatus, the control unit switches between transmission and reception of the information based on whether the state of the power receiving apparatus is a predetermined state.