Bluetooth Audio Streaming Bandwidth Optimization
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Solution Overview
Problem
Bluetooth audio data streaming methods waste bandwidth resources due to repetitive transmission of periodic advertising messages, especially in 5.1-channel surround sound systems, where unnecessary metadata is continuously sent after initial reception.
Innovation Solution
A method for transmitting audio data using Bluetooth low energy in a short-range wireless communication system that forms a connection with a sink device, performs a setup procedure including timing and metadata information, and transmits audio data without periodic advertising messages, optimizing bandwidth usage by using a unicast method for initial setup and metadata transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If periodic advertising messages are transmitted continuously to send timing and metadata information, then the sink device can receive audio data, but bandwidth resources are wasted due to repetitive transmissions after initial reception
Solution Approach 1:
The source device transmits timing information and metadata information through a unicast connection establishment phase before audio data transmission begins. This preliminary transmission ensures the sink device has all necessary information for audio playback without requiring continuous periodic advertising messages during the actual audio streaming, thereby eliminating repetitive transmissions while maintaining transmission reliability.
2Speed
If Bluetooth classic BR/EDR method is used for audio streaming, then high speed transmission is achieved, but device complexity and connection management overhead increase
Solution Approach 1:
The patent changes the connection management parameters by using Bluetooth Low Energy (BLE) instead of Bluetooth Classic BR/EDR. BLE uses simplified connection establishment and management protocols with reduced overhead, while still achieving adequate audio streaming speeds for the intended application. This parameter change reduces device complexity and connection management burden while maintaining functional performance.
3Adaptability or versatility
If Bluetooth devices without display or user interface are connected, then device versatility is improved, but ease of operation deteriorates due to increased connection and management complexity
Solution Approach 1:
The source device performs automatic connection establishment and configuration with the sink device without requiring user intervention. The system automatically manages the Bluetooth connection, transmits the necessary timing and metadata information, and initiates audio streaming without user input. This self-service approach maintains versatility by supporting various Bluetooth devices while simplifying operation for users of devices without displays or interfaces.
Data Source
AI summary
The present specification relates to a method by which a source device transmits audio data in a short-range wireless communication system, and to an apparatus for same. The method proposed in the present specification comprises the steps of: establishing a connection with a sink device; performing a setup procedure for transmitting the audio data with the sink device on the basis of the established connection; and transmitting, to the sink device, the audio data on the basis of the setup procedure, wherein the steps of performing a setup procedure further comprises a step of transmitting, to the sink device, timing information on a transmission timing of the audio data and metadata information for transmission of the audio data, and the audio data is transmitted without transmission of a periodic advertisement message for transmitting the timing information and the metadata information.