Compressed L2CAP Header for BLE Audio Transmission
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Solution Overview
Problem
Bluetooth Low Energy (BLE) systems do not support the transmission of audio data, leading to high overhead and power consumption in devices that require low power communication, such as hearing aids.
Innovation Solution
A method and apparatus for transmitting and receiving audio data in BLE-based wireless communication systems by configuring a data packet with identification information indicating the presence of audio data, using a compressed L2CAP header to reduce overhead and power consumption, and implementing a master-slave communication scheme to efficiently transmit audio data packets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If audio data is transmitted using standard BLE protocols, then audio data transmission is achieved, but overhead and power consumption increase significantly
Solution Approach 1:
The L2CAP header is segmented into essential fields only, removing non-essential fields for audio data transmission. This segmentation reduces the header size from the standard format to a compact form that includes only necessary information for audio packet identification and routing.
Solution Approach 2:
Non-essential header fields are extracted and removed from the L2CAP header structure. The patent extracts only the critical fields needed for audio data transmission, eliminating redundant information that increases overhead but provides no additional value for audio streams.
2Ease of operation
If standard L2CAP header format is used, then protocol compatibility is maintained, but packet size and power consumption increase
Solution Approach 1:
The patent applies local quality by creating a specialized, optimized L2CAP header format specifically tailored for audio data transmission. Instead of using the generic header format for all data types, the header structure is locally adapted to include only the fields necessary for audio packets, reducing overall packet size while maintaining compatibility through preserved essential field formats.
3Loss of information
If identification information is added to indicate audio data presence, then audio data can be distinguished, but packet overhead increases
Solution Approach 1:
The identification information for audio data is merged into the existing L2CAP header structure rather than being added as a separate field. The patent combines the audio data indicator with other header fields, utilizing the same structural framework to serve multiple functions: routing identification and audio data type indication, thereby avoiding additional overhead.
Data Source
AI summary
A method for transmitting audio data by a master device in a Bluetooth Low Energy (BLE)-based wireless communication system is provided. The method includes configuring a data packet to include identification information indicating whether the audio data is included in a payload of the data packet and transmitting the data packet to at least one slave device.