AVN Terminal Multi-Device Bluetooth Connection Management
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Solution Overview
Problem
Current vehicle AVN terminals can only connect up to two Bluetooth devices, lacking a method to seamlessly connect three or more devices, which causes user inconvenience and affects initial quality studies due to sensitive Bluetooth functionality.
Innovation Solution
A method and apparatus that allows seamless connection of multiple Bluetooth devices to a vehicle AVN terminal by receiving a connection request from a third device, releasing connections from existing devices, and setting connections to the new device, using a dispatch Bluetooth agent to sense sound source play and transmit connection requests, and controlling streaming data to output through vehicle speakers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the AVN terminal connects up to two Bluetooth devices simultaneously, then the connection stability is maintained within software driver limits, but the system cannot support seamless connection of three or more Bluetooth devices
Solution Approach 1:
The system dynamically adjusts Bluetooth connections by monitoring connection requests and automatically releasing connections from existing devices when new devices are connected. The controller continuously manages the connection state, transitioning between different connection configurations to support more than two devices while maintaining stable connections at any given time.
Solution Approach 2:
The system changes the connection parameter from a static limit of two devices to a dynamic state where connections can be released and reconfigured. By modifying the connection state parameter based on incoming connection requests and playback status, the system enables seamless connection of multiple devices beyond the traditional two-device limit.
2Reliability
If manual Bluetooth pairing procedure is required for each device, then connection reliability is ensured through user confirmation, but user inconvenience increases and pairing time is extended
Solution Approach 1:
The system performs preliminary actions by automatically initiating connection requests and releasing connections based on predetermined conditions such as sound source playback detection. The dispatch Bluetooth agent monitors playback status and triggers connection management actions in advance, eliminating the need for manual user intervention during each pairing process.
Solution Approach 2:
The system provides self-service by automatically managing Bluetooth connections without requiring user manipulation. The controller monitors connection requests, determines which devices to connect or release based on playback status, and executes connection management autonomously, reducing both pairing time and user burden while maintaining reliable connections.
3Adaptability or versatility
If the AVN terminal automatically manages connection release and setting for multiple Bluetooth devices, then seamless connection of three or more devices is enabled, but the device complexity of the control system increases
Solution Approach 1:
The dispatch Bluetooth agent serves as an intermediary between the audio playback system and the Bluetooth connection management. It monitors sound source playback and communicates with the controller to trigger connection requests and release actions, simplifying the overall control architecture by introducing a dedicated intermediary component that handles the complexity of multi-device management.
Data Source
AI summary
A method of connecting multiple electronic devices to an audio video navigation (AVN) teminal mounted in a vehicle includes receiving a connection request message from a third Bluetooth device in a state in which first and second Bluetooth devices have been connected to the AVN terminal, searching for a Bluetooth device, connection of which can be released, and releasing connection to any one of the first and second Bluetooth devices according to a search result and setting connection to the third Bluetooth device.