Wireless Audio Data Transmission Across Dual Link Groups for BLE Reliability
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Solution Overview
Problem
The limitations in time slot resources for Bluetooth Low Energy (BLE) audio transmission in wireless broadcast audio (WBA) functions lead to unstable audio data transmission, particularly in environments with fading or interference, resulting in interruptions and a poor user experience.
Innovation Solution
A method and device that transmit two distinct audio data units from the same audio frame through different communication link groups within isochronous intervals, where the first data unit carries more information and is transmitted via a primary link group, while the second, less information-carrying unit is transmitted via a secondary link group, ensuring stable transmission even if the primary link fails.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If audio data is transmitted using a single communication link group in WBA, then time slot resource usage is minimized, but transmission reliability deteriorates in fading or interference environments
Solution Approach 1:
The patent divides the audio data transmission into two separate communication link groups: a first communication link group for transmitting first audio data units and a second communication link group for transmitting second audio data units. This segmentation allows the system to utilize different time slot resources through different link groups, thereby improving transmission reliability in fading or interference environments while managing complexity through structured organization of transmission paths.
2Reliability
If more time slot resources are allocated for audio transmission, then transmission reliability improves, but resource efficiency worsens
Solution Approach 1:
The patent transmits second audio data units (which carry less audio information) through the second communication link group in addition to the primary transmission path. This partial redundancy approach provides backup transmission capability without fully duplicating the resource consumption of the primary link, thereby improving reliability while maintaining reasonable resource efficiency.
3Reliability
If audio data units with full information are transmitted through multiple links, then reliability improves, but resource consumption increases
Solution Approach 1:
The patent applies different transmission strategies to different types of audio data units: first audio data units (carrying more information) are transmitted through the first communication link group, while second audio data units (carrying less information) are transmitted through the second communication link group. This local differentiation optimizes resource allocation by matching transmission capacity to data importance, improving reliability without unnecessarily increasing overall data transmission volume.
Data Source
AI summary
The present invention provides a wireless audio data transmission method and a related device. A master device performs broadcast communication with one or more first slave devices within continuous isochronous intervals to transmit an audio stream. The method comprises: obtaining a first audio data unit and a second audio data unit respectively based on an audio frame in the audio stream, wherein the first audio data unit and the second audio data unit obtained based on the same audio frame carry different audio information; encapsulating the first audio data unit to obtain a first broadcast data packet and encapsulating the second audio data unit to obtain a second broadcast data packet; and transmitting the first broadcast data packet via a first communication link group and the second broadcast data packet via a second communication link group within one of the isochronous intervals respectively, wherein an airtime slot occupied by the first audio data unit is greater than that occupied by the second audio data unit. The present invention enhances audio transmission reliability between the master device and the slave devices.