Bluetooth Audio Output System With Dual Controller Segmentation
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Solution Overview
Problem
Current Bluetooth (BT) technology experiences transmission delays when switching links between multiple BT devices due to the limited radio frequency source, which restricts simultaneous active use of multiple BT mobile phones with a BT earbud.
Innovation Solution
Implementing a wireless BT audio output system with a primary BT controller managing an active link and a secondary BT controller managing inactive links, allowing the primary controller to focus on real-time streaming while the secondary controller maintains connections with additional devices without controlling audio playback, thereby reducing the need for device wake-up and minimizing delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a time division mechanism is used to allow multiple BT mobile phones to share the BT earbud resource, then the multipoint mode is enabled, but transmission delay occurs when switching links between devices
Solution Approach 1:
The patent segments the BT controller into two independent controllers: a primary BT controller dedicated to handling the active link for real-time audio streaming, and a secondary BT controller dedicated to managing inactive links. This segmentation allows each controller to specialize in its specific function, eliminating the need for the single controller to switch between different link modes, thereby reducing transmission delay while maintaining multipoint mode capability.
2Device complexity
If a single BT controller is used to manage multiple links, then device complexity is reduced, but the radio frequency source cannot serve multiple devices simultaneously causing link switching delays
Solution Approach 1:
The patent divides the single BT controller into two separate controllers: the primary BT controller exclusively manages the active link with low latency requirements, while the secondary BT controller manages inactive links. This segmentation increases the controller structure complexity slightly but dramatically improves link switching speed by eliminating the need for the radio frequency source to reconfigure between different link types, as each controller operates independently on its designated links.
Data Source
AI summary
A control method for a wireless Bluetooth (BT) audio output system includes: establishing an active link between a main BT controller to a first BT smart device among a plurality of BT smart devices; establishing an inactive link between an extra BT controller to a second BT smart device among the plurality of BT smart devices; and playing, by means of an audio output element, media data transmitted from the first BT smart device via the active link under control of the primary BT controller.