Bluetooth Slave Device Architecture Reducing Hardware Complexity
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Solution Overview
Problem
Current Bluetooth devices, such as mice, are wasteful in hardware resources and costly due to their need to support both master and slave device functionalities, despite only requiring slave functionality, as existing circuit architectures and connection methods require both capabilities for connection establishment.
Innovation Solution
A Bluetooth slave device with a simplified architecture, comprising a communication module, memory for storing an access code, and an RF output module, which transmits an access code to initiate a connection with a master device, eliminating the need for inquiry scanning and reducing circuit complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If Bluetooth devices are equipped with both master and slave device functionalities to establish connections, then connection compatibility is improved, but hardware resource usage and device complexity increase
Solution Approach 1:
The patent extracts and removes the master device functionality from Bluetooth devices that only need to receive connections. By eliminating the inquiry scanning module and master device processing logic, the device complexity is reduced while slave device functionality and connection compatibility are preserved. The device only performs paging scanning and responds to connection requests.
Solution Approach 2:
The patent applies universality by designing a Bluetooth device that can operate as a slave device in various connection scenarios without requiring master device capabilities. The simplified architecture provides universal slave functionality that works with any master device, eliminating the need for dual functionality in single-role devices.
2Adaptability or versatility
If Bluetooth devices support both master and slave functionalities, then connection establishment capability is improved, but hardware resource usage increases
Solution Approach 1:
The patent removes the master device functional modules including the inquiry scanning module and master device state machine from the device. This extraction eliminates unnecessary hardware resources such as RF transmission power amplifiers for inquiry signals, inquiry packet generation circuits, and master device protocol processing units, thereby reducing hardware resource usage while maintaining connection establishment capability as a slave device.
3Adaptability or versatility
If conventional Bluetooth connection method is used, then connection compatibility is improved, but device cost increases
Solution Approach 1:
The patent extracts and eliminates master device functionality to reduce device cost. By removing the inquiry scanning module, master device protocol stack, and associated hardware resources, the bill of materials and manufacturing complexity are reduced. The device can still establish connections compatibly with conventional Bluetooth master devices through its slave device functionality.
Data Source
AI summary
A slave device that complies with Bluetooth communication protocol includes a communication module, a memory and a RF output module. The communication module can be operated to generate a driving signal. The memory stores an access code that complies with Bluetooth communication protocol and is electrically connected to the communication module. The memory is configured to determine whether or not to output the access code according to the driving signal output by the communication module. The RF output module is electrically connected to the memory so as to receive and output the access code.