BLE Audio Multicast Transmission for Power Optimization
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Solution Overview
Problem
Bluetooth Low Energy (BLE) protocols face challenges in achieving high audio quality while minimizing power consumption, particularly in noisy environments due to restricted data rates and excessive power consumption from retransmissions.
Innovation Solution
A method and apparatus for transmitting audio data using a multicast/broadcast channel in BLE, where the data packet is repetitively transmitted a determined number of times based on the maximum connection interval, optimizing power usage and reducing retransmission overhead by transmitting the same data to multiple slave devices simultaneously.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If Bluetooth Low Energy is used to reduce power consumption, then power consumption is reduced, but data rate is insufficient and retransmissions occur in noisy environments
Solution Approach 1:
The patent merges multiple unicast transmissions into a single multicast transmission. Instead of transmitting audio data separately to each slave device (which causes multiple retransmissions and higher power consumption), the system uses a multicast channel to transmit the same data packet to multiple slave devices simultaneously, reducing overall retransmission overhead and power consumption while maintaining reliability
Solution Approach 2:
The multicast channel serves multiple slave devices simultaneously with a single transmission. The channel is designed to be universally accessible by all connected slave devices, allowing one transmission to fulfill multiple delivery requirements and eliminating the need for separate unicast transmissions to each device
2Adaptability or versatility
If data is transmitted to multiple slave devices using unicast, then each device receives data, but power consumption increases due to repeated retransmissions
Solution Approach 1:
The patent combines multiple individual data transmissions into a single multicast transmission. Instead of transmitting data to each slave device separately (which requires multiple retransmissions in noisy environments), the system uses one multicast transmission that delivers data to all connected slave devices simultaneously, significantly reducing power consumption while maintaining universal data delivery
Solution Approach 2:
The system creates a copy of the audio data packet that can be distributed to multiple slave devices through the multicast channel. This copying mechanism allows the same data to be delivered to multiple devices without requiring multiple separate transmission operations, reducing the overall energy consumption of the system
Data Source
AI summary
A method and an apparatus are provided for transmitting audio data. The method includes setting a connection with a plurality of slave devices by using a short range wireless communication protocol, generating a data packet comprising the audio data, and repetitively transmitting the data packet to the plurality of slave devices through a multicast/broadcast channel a number of times.