BLE Peripheral Advertising Signal Connection Status Switching
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Solution Overview
Problem
Current Bluetooth Low Energy (BLE) communication systems are cumbersome when changing connections between peripheral and central devices, as they do not allow simultaneous connections with multiple central devices, requiring manual disconnection and reconnection processes.
Innovation Solution
A communication apparatus and method that repeatedly transmits advertising signals with connection status information, allowing seamless switching between central devices by disconnecting from one central device and connecting to another upon receiving a connection request, thereby simplifying the process of changing connection partners.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a peripheral device maintains connection with one central device at a time in BLE communication, then connection stability is ensured, but the ease of operation deteriorates when changing connection partners
Solution Approach 1:
The peripheral device transmits advertising packets in advance that contain connection status information indicating whether it is currently connected to a central device. This preliminary information transmission allows central devices to understand the peripheral's connection state before initiating connection requests, enabling smoother connection transitions without requiring complex manual disconnection and reconnection operations by the user.
2Reliability
If a peripheral device prohibits connection requests when already connected to a central device, then connection stability is maintained, but the adaptability deteriorates when needing to switch to another central device
Solution Approach 1:
The peripheral device dynamically changes its advertising packet content based on its current connection state. When connected to a central device, the advertising packet includes connection status information indicating the device is occupied. When not connected, it transmits advertising packets without this restriction indicator. This dynamic adaptation allows the system to maintain connection stability when needed while enabling flexible switching to other central devices when appropriate, resolving the contradiction between stability and adaptability.
Data Source
AI summary
A communication apparatus includes a communication unit that repeatedly transmits an advertising signal, and a control unit that, in a case of being not connected with a central device via the communication unit, controls the communication unit to transmit an advertising signal that includes information based on not being connected with the central device, and, in a case of being connected to the central device via the communication unit, controls the communication unit to transmit an advertising signal that includes information based on being connected with the central device, when receiving from another central device a connection request with respect to an advertising signal that includes information based on being connected with the central device, the control unit disconnects a BLE connection with the connected central device, and establishes a BLE connection with the another central device.