Isochronous Adaption Layer Mode Switching for Bluetooth LE Audio
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Solution Overview
Problem
Current wireless audio streaming over Bluetooth LE connections is inefficient due to unnecessary power consumption when other devices in the same group are in an inactive or low-power state, leading to wasted power and bandwidth, and existing methods to switch modes result in audio glitches and user experience issues.
Innovation Solution
Implementing an automatic mode switching mechanism that dynamically adjusts the isochronous adaptation layer's communication mode based on the activity status of connected devices, switching from unsegmented framed mode to unframed mode when devices are idle, without disconnecting and reconnecting, to match the audio stream interval and reduce power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If unsegmented framed mode is used to maintain compatibility with other devices in the group, then communication compatibility is improved, but power consumption increases due to unnecessary transmissions at 7.5 ms intervals
Solution Approach 1:
The patent implements dynamic mode switching between unsegmented framed mode and unframed mode based on the activity status of other devices in the group. When other devices are inactive, the system switches to unframed mode with 10 ms intervals to reduce power consumption. When other devices are active, the system uses unsegmented framed mode with 7.5 ms intervals to maintain compatibility. This dynamic adaptation resolves the contradiction by making the communication mode flexible rather than fixed.
Solution Approach 2:
The patent changes the communication parameter (ISO interval) from fixed 7.5 ms to variable intervals of either 7.5 ms or 10 ms based on device activity. By monitoring whether other devices in the group are active or inactive, the system adjusts the transmission interval parameter to optimize the trade-off between compatibility and power consumption.
2Use of energy by moving object
If mode switching is implemented to reduce power consumption, then energy efficiency is improved, but audio glitches occur due to connection disruptions
Solution Approach 1:
The patent performs preliminary monitoring of device activity status before switching modes. By detecting when other devices become inactive beforehand, the system can smoothly transition to unframed mode without abrupt connection disruptions. This preliminary detection allows the audio stream to continue uninterrupted while reducing power consumption.
Solution Approach 2:
The patent uses an intermediary mechanism (mode indicator in protocol data units) to coordinate the transition between communication modes. This intermediary allows both the host and listening device to synchronize their mode changes, ensuring seamless transitions that maintain audio stream continuity while achieving energy efficiency.
Data Source
AI summary
Disclosed herein are devices, methods, and systems for automatically switching a mode of the isochronous adaption layer. The system establishes a connection group via a wireless transceiver, where the connection group includes a listening device and another device. The wireless transceiver may transmit data packets to the connection group using a communication connection in a data packet mode. The system may determine a reconfiguration of the communication connection based on an activity status of the other device within the connection group, wherein the reconfiguration comprises changing the data packet mode of the communication connection to a second data packet mode. The system may then cause the wireless transceiver to transmit the data packets over the communication connection in the second data packet mode.