Isochronous Channel Mechanism for BLE Audio Transmission
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Solution Overview
Problem
Bluetooth Low Energy (BLE) technology faces challenges in transmitting audio streams efficiently due to high energy efficiency requirements and latency issues, making it difficult to support periodic data transmission like audio data, which often results in latency problems and reduced energy efficiency.
Innovation Solution
The implementation of an isochronous channel mechanism in BLE technology for transmitting and receiving audio streams, allowing for periodic data transmission with guaranteed latency and interleaved packet transmission modes, independent of acknowledgement receipt, to improve energy efficiency and data transfer reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If traditional BLE data channels are used for audio stream transmission, then energy consumption is reduced, but latency increases and transmission reliability deteriorates
Solution Approach 1:
The patent segments the transmission process by separating audio data packets from acknowledgment packets in time. Multiple audio packets are transmitted in succession during a channel interval without waiting for acknowledgments, and acknowledgments are sent separately after the channel interval. This segmentation allows continuous transmission improving reliability while maintaining BLE's energy-efficient operation mode.
Solution Approach 2:
The patent applies preliminary action by transmitting multiple audio packets in advance during the channel interval before receiving acknowledgments. The transmitting device sends packets proactively without waiting for confirmation, ensuring that audio data reaches the receiving device within the required time frame while maintaining energy efficiency.
2Use of energy by moving object
If traditional BLE data channels are used for audio stream transmission, then energy efficiency is improved, but latency increases
Solution Approach 1:
The patent implements periodic action by establishing regular channel intervals for audio transmission. Within each channel interval, multiple audio packets are transmitted at predetermined times according to a periodic schedule. This periodic structure ensures consistent latency performance while maintaining the energy efficiency of BLE by operating in structured transmission bursts rather than continuous communication.
Solution Approach 2:
The patent achieves continuity of useful action by transmitting multiple audio packets in succession during each channel interval without interruption or waiting for acknowledgments. This continuous transmission sequence reduces latency compared to traditional stop-and-wait protocols while maintaining BLE's energy-efficient operation by confining continuous transmission to structured intervals.
3Reliability
If acknowledgments are waited for before transmitting next audio packet, then transmission reliability improves, but productivity decreases
Solution Approach 1:
The patent segments the transmission-acknowledgment cycle by separating audio packet transmission from acknowledgment reception in time. Multiple audio packets are transmitted in a sequence during the channel interval without interleaving acknowledgments, which increases transmission speed while reliability is maintained through separate acknowledgment handling after the interval.
Solution Approach 2:
The patent maintains continuity of useful action by transmitting audio packets continuously during the channel interval without pausing for acknowledgments. This continuous transmission maximizes data throughput and productivity while reliability is ensured by sending acknowledgments separately after the transmission phase completes.
Data Source
AI summary
Disclosed are a method and apparatus for transmitting and receiving data using a Bluetooth low energy (BLE) technology. A method of transmitting or receiving data using Bluetooth low energy (BLE) in a wireless communication system includes forming Bluetooth LE connection with a second device, establishing an isochronous channel for transmitting an audio packet with the second device and transmitting audio packets to the second device through the isochronous channel using an interleaved method at a specific channel interval. The sequence in which the audio packets are transmitted may be determined regardless of whether acknowledgement (ACK) for each of the audio packets is received from the second device.