BLE Audio Data Transmission Reliability via Target Mapping Table
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Solution Overview
Problem
Bluetooth Low Energy Audio (BLE Audio) technology experiences low reliability in audio data transmission due to unsuccessful acknowledgement messages, leading to delayed retransmission of unsent audio data, which affects the overall efficiency and reliability of wireless audio services.
Innovation Solution
A data transmission method that involves generating a target mapping table based on the reception status of data packets, including both successful and unsuccessful receptions, and transmitting this table to the audio source device within the same time interval to facilitate timely retransmission of failed data packets, thereby improving transmission reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the receiving device transmits an acknowledgement message to confirm reception status, then the audio source device can confirm reception status, but the audio source device may not receive the acknowledgement message successfully due to interference, resulting in delayed retransmission
Solution Approach 1:
The receiving device proactively generates a target mapping table that records the reception status of data packets before the acknowledgement message is transmitted. This preliminary action ensures that even if the acknowledgement message is lost due to interference, the audio source device can obtain the reception status information through alternative means (such as subsequent mapping tables or retransmission protocols), thereby preventing indefinite delays in retransmission while maintaining accurate reception status tracking.
2Reliability
If the audio source device waits for acknowledgement messages to confirm reception status, then transmission accuracy can be maintained, but transmission efficiency decreases due to potential retransmission delays
Solution Approach 1:
The receiving device generates and transmits a target mapping table that provides comprehensive feedback on the reception status of data packets. This mapping table includes information about successfully received packets and packets that require retransmission. By providing this structured feedback mechanism, the audio source device can efficiently identify which packets need retransmission without waiting for multiple acknowledgement messages, thereby improving transmission efficiency while maintaining reception accuracy.
Data Source
AI summary
The present invention discloses a data transmission method, and a data transmission device, which relates to the field of wireless communication technology to solve the problem of low reliability in audio data transmission. The data transmission method is applied to a first device and comprises: receiving a first data group transmitted by a second device during a first time interval, the first data group comprising a first initial data group and/or a first retransmission data group, wherein the first initial data group comprises one or more first data packets that have not been transmitted by the second device before the first time interval, and the first retransmission data group comprises one or more second data packets comprising at least a portion of one or more data packets transmitted by the second device before the first time interval that were not successfully received by the first device; generating a target mapping table based on a reception status of the first data group and a reception status of the data packets transmitted by the second device before the first time interval, wherein the reception status comprises a failed reception; and transmitting the target mapping table to the second device within the first time interval. In this way, the reliability of the audio data transmission can be improved.