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A data retransmission method, bluetooth master device and wireless communication system

A bluetooth master device and data retransmission technology, applied in wireless communication, short-distance communication service, error prevention/detection using return channel, etc., can solve problems such as difficulty in ensuring data transmission reliability, and achieve the effect of improving reliability

Active Publication Date: 2021-10-26
NANJING ZGMICRO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the actual application process, in the increasingly serious interference environment, it is difficult for CSB / BIS to guarantee the reliability of data transmission

Method used

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  • A data retransmission method, bluetooth master device and wireless communication system
  • A data retransmission method, bluetooth master device and wireless communication system
  • A data retransmission method, bluetooth master device and wireless communication system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Such as figure 1 As shown, this embodiment proposes a data retransmission method, the method comprising:

[0030] S101, sending broadcast data to the Bluetooth slave device in the sending time slot at a preset sending interval;

[0031] S102. Receive an acknowledgment packet sent by the Bluetooth slave device, where the acknowledgment packet includes a synchronization word;

[0032] S103, detecting the confirmation packet to obtain a signal strength value and a normalized correlation value of the synchronization word;

[0033] S104. Determine retransmission broadcast data according to the signal strength value and the synchronization word normalized correlation value.

[0034] The data retransmission method described in this embodiment is applied to a Bluetooth master device, and may also become a CSB master device. First, the CSB master device sends broadcast data to the CSB slave device in the sending time slot at a preset sending interval, and the CSB slave device...

Embodiment 2

[0037] Such as figure 2 As shown, this embodiment proposes a data retransmission method, the method comprising:

[0038] S201, receiving the broadcast data sent by the Bluetooth master device at a preset receiving interval;

[0039] S202, detecting whether the broadcast data sent by the Bluetooth master device is correctly received;

[0040] S203. When it is detected that the broadcast data sent by the Bluetooth master device is incorrectly received, request the Bluetooth master device to retransmit the broadcast data and receive the retransmitted broadcast data.

[0041] The data retransmission method described in this embodiment is applied to a Bluetooth slave device, which may also be called a CSB slave device. In this embodiment, a data feedback mechanism is added to the CSB slave device, that is to say, the CSB slave device itself is allowed to judge whether the Bluetooth master device (that is, the CSB master device) needs to retransmit the broadcast data. In order t...

Embodiment 3

[0046] Such as Figure 4 As shown, the present embodiment proposes a bluetooth master device, which includes an antenna, a radio frequency transceiver, a baseband processor, an acknowledgment packet detector and a bluetooth protocol processor;

[0047] The radio frequency transceiver is used to modulate the baseband signal sent by the baseband processor into a radio frequency signal and send it to the bluetooth slave device through the antenna, and receive the confirmation packet sent by the bluetooth slave device received by the antenna, and send the confirmation packet to Acknowledgment packet detector, described acknowledgment packet is that bluetooth does not receive the broadcast data sent correctly from equipment, requests the data packet that retransmission broadcast data generates;

[0048] The baseband processor is used to convert the broadcast data sent by the bluetooth protocol processor and the confirmation packet sent by the radio frequency transceiver into baseba...

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Abstract

An embodiment of the present invention provides a method for retransmitting data. The method includes: sending broadcast data to the Bluetooth slave device in the sending time slot at a preset sending interval; when receiving the confirmation packet sent by the Bluetooth slave device, sending The bluetooth slave device retransmits the broadcast data corresponding to the confirmation packet; the confirmation packet is a signal generated by the bluetooth slave device not correctly receiving the sent broadcast data and requesting retransmission of the broadcast data. The embodiment of the invention also provides a bluetooth master device and a wireless communication system. On the basis of the existing point-to-multipoint broadcast transmission mechanism, the present invention utilizes the characteristics that multiple bluetooth slave devices use the same synchronization word to send simultaneously on the same channel, and judges whether to Automatic retransmissions are implemented to improve the reliability of point-to-multipoint broadcast transmissions in the presence of Bluetooth slave devices requiring data retransmissions.

Description

technical field [0001] The invention relates to the field of bluetooth wireless communication, in particular to a data retransmission method, bluetooth main equipment and a wireless communication system. Background technique [0002] The extensive development of Bluetooth technology has made Bluetooth products a part of people's lives, especially the application of Bluetooth headsets and Bluetooth speakers with smartphones as the central node has brought great convenience to people. Bluetooth is mainly a point-to-point communication technology, such a network topology limits Bluetooth to meet more and more extensive needs of people. To this end, the Bluetooth standard has added a connectionless slave broadcast technology (CSB: Connectionless Slave Broadcast), and will soon add Bluetooth Low Energy (BLE: Bluetooth Low Energy) synchronous channel broadcast technology (BIS: Broadcast Isochronous Stream) to the future standard to achieve Point-to-multipoint data transmission. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W4/06H04W4/80H04W28/04H04L1/16
CPCH04L1/16H04W4/06H04W28/04H04W4/80
Inventor 徐斌
Owner NANJING ZGMICRO CO LTD
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