Data retransmission method, bluetooth slave equipment and wireless communication system

A technology of data retransmission and bluetooth master device, 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: 2018-10-02
NANJING ZGMICRO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the actual application process, in the increasingly serious interference...

Method used

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  • Data retransmission method, bluetooth slave equipment and wireless communication system
  • Data retransmission method, bluetooth slave equipment and wireless communication system
  • Data retransmission method, bluetooth slave equipment and wireless communication system

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0030] Such as figure 1 As shown, this embodiment proposes a data retransmission method, the method comprising:

[0031] S101, receiving the broadcast data sent by the Bluetooth master device at a preset receiving interval;

[0032] S102, detecting whether the broadcast data sent by the Bluetooth master device is correctly received;

[0033] S103. When it is detected that the broadcast data sent by the Bluetooth master device is not correctly received, request the Bluetooth master device to retransmit the broadcast data and receive the retransmitted broadcast data.

[0034] 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 ...

Embodiment 2

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

[0038] S201, sending broadcast data to the Bluetooth slave device in the sending time slot at a preset sending interval;

[0039] S202. Receive an acknowledgment packet sent by the Bluetooth slave device, where the acknowledgment packet includes a synchronization word;

[0040] S203, detecting the confirmation packet to obtain a signal strength value and a normalized correlation value of the synchronization word;

[0041] S204. Determine retransmission broadcast data according to the signal strength value and the normalized correlation value of the synchronization word.

[0042] 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 slav...

Embodiment 3

[0047] Such as Figure 4 As shown, the present embodiment proposes a bluetooth slave device, which includes a data transceiver module and a processor;

[0048] The data transceiver module is used to receive the broadcast data sent by the Bluetooth master device at a preset receiving interval;

[0049] The processor is configured with processor-executable operation instructions to perform the following operations:

[0050] Detect whether the broadcast data sent by the Bluetooth master device is correctly received;

[0051] When it is detected that the broadcast data sent by the Bluetooth master device is not correctly received, request the Bluetooth master device to retransmit the broadcast data and receive the retransmitted broadcast data.

[0052] Specifically, the Bluetooth slave device described in this embodiment is essentially a CSB slave device. This embodiment adds a data feedback mechanism to the CSB slave device, that is to say, let the CSB slave device itself judge...

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Abstract

The embodiment of the invention provides a data retransmission method. The data retransmission method comprises the steps of receiving broadcast data transmitted by bluetooth master equipment at a preset receiving interval; detecting whether the broadcast data transmitted by the bluetooth master equipment is correctly received or not; and when it is detected that the broadcast data transmitted bythe bluetooth master equipment is not correctly received, requesting the bluetooth master equipment to retransmit the broadcast data, and receiving the retransmitted broadcast data. The embodiment ofthe invention further provides bluetooth slave equipment and a wireless communication system. The data retransmission method has an additional function of feeding back information of incorrect reception after the bluetooth slave equipment receives the broadcast data on the basis of the existing point-to-multipoint broadcast transmission mechanism. Whether there is bluetooth slave equipment requesting data retransmission or not is judged according to a relation between the bluetooth master equipment and the feedback data by using a characteristic that multiple sets of bluetooth slave equipmentsimultaneously transmit by adopting the same synchronization word on the same channel, thereby realizing automatic retransmission, and thus improving the reliability of point-to-multipoint broadcast transmission.

Description

technical field [0001] The invention relates to the field of bluetooth wireless communication, in particular to a data retransmission method, a bluetooth slave device 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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IPC IPC(8): H04W4/06H04W4/80H04W28/04H04L1/16
CPCH04L1/16H04W4/06H04W4/80H04W28/04Y02D30/70
Inventor 徐斌
Owner NANJING ZGMICRO CO LTD
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