CN108616819B - Data retransmission method, Bluetooth main device and wireless communication system - Google Patents
Data retransmission method, Bluetooth main device and wireless communication system Download PDFInfo
- Publication number
- CN108616819B CN108616819B CN201810247392.XA CN201810247392A CN108616819B CN 108616819 B CN108616819 B CN 108616819B CN 201810247392 A CN201810247392 A CN 201810247392A CN 108616819 B CN108616819 B CN 108616819B
- Authority
- CN
- China
- Prior art keywords
- broadcast data
- bluetooth
- bluetooth slave
- time slot
- master device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/04—Error control
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/80—Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The embodiment of the invention provides a data retransmission method, which comprises the following steps: transmitting broadcast data to the Bluetooth slave equipment in a transmission time slot at a preset transmission interval; when receiving an acknowledgement packet sent by the Bluetooth slave equipment, retransmitting broadcast data corresponding to the acknowledgement packet to the Bluetooth slave equipment; the confirmation packet is a signal generated by the bluetooth slave device not correctly receiving the transmitted broadcast data and requesting retransmission of the broadcast data. The embodiment of the invention also provides the Bluetooth master device and a wireless communication system. On the basis of the existing point-to-multipoint broadcast transmission mechanism, the invention utilizes the characteristic that a plurality of Bluetooth slave devices adopt the same synchronous word to simultaneously transmit on the same channel, and judges whether the Bluetooth slave devices require data retransmission according to the relation between the Bluetooth master device and feedback data, thereby realizing automatic retransmission and improving the reliability of point-to-multipoint broadcast transmission.
Description
Technical Field
The present invention relates to the field of bluetooth wireless communication, and in particular, to a data retransmission method, a bluetooth master device, and a wireless communication system.
Background
The wide development of the bluetooth technology makes bluetooth products become a part of people's life, and especially brings great convenience to people with the application of bluetooth earphones and bluetooth sound boxes which take smart phones as central nodes. Bluetooth is mainly a point-to-point communication technology, and such network topology limits bluetooth to meet more and more extensive demands of people. For this reason, the Bluetooth standard adds a Connectionless Slave Broadcast technology (CSB), that is, a Bluetooth Low Energy (BLE) synchronous channel Broadcast technology (BIS) is added to the future standard to realize point-to-multipoint data transmission. That is, one bluetooth device, which serves as a bluetooth master, can transmit broadcast data to a plurality of bluetooth slaves. However, in practical applications, it is difficult for the CSB/BIS to ensure the reliability of data transmission in an increasingly severe interference environment.
Disclosure of Invention
In view of this, embodiments of the present invention are expected to provide a data retransmission method, a bluetooth master device, and a wireless communication system, which improve reliability of point-to-multipoint broadcast transmission by means of data retransmission.
In order to achieve the above purpose, the technical solution of the embodiment of the present invention is realized as follows:
a first aspect of an embodiment of the present invention provides a data retransmission method, where the method includes:
transmitting broadcast data to the Bluetooth slave equipment in a transmission time slot at a preset transmission interval;
when receiving an acknowledgement packet sent by the Bluetooth slave equipment, retransmitting broadcast data corresponding to the acknowledgement packet to the Bluetooth slave equipment;
the confirmation packet is a data packet generated by the Bluetooth slave device not correctly receiving the transmitted broadcast data and requesting to retransmit the broadcast data.
A second aspect of the embodiments of the present invention provides a bluetooth master device, where the bluetooth master device includes an antenna, a radio frequency transceiver, a baseband processor, an acknowledgement packet detector, and a bluetooth protocol processor;
the radio frequency transceiver is used for modulating a baseband signal sent by the baseband processor into a radio frequency signal and sending the radio frequency signal to the Bluetooth slave equipment through the antenna, receiving an acknowledgement packet sent by the Bluetooth slave equipment and received by the antenna, and sending the acknowledgement packet to the acknowledgement packet detector, wherein the acknowledgement packet is a signal generated by the Bluetooth slave equipment not correctly receiving the sent broadcast data and requesting to retransmit the broadcast data;
the baseband processor is used for processing the broadcast data sent by the Bluetooth protocol processor and the confirmation packet sent by the radio frequency transceiver and converting the broadcast data and the confirmation packet into baseband signals;
the acknowledgement packet detector is used for receiving an acknowledgement packet which is transmitted by the radio frequency transceiver and converted into a baseband signal, and detecting the acknowledgement packet;
and the Bluetooth protocol processor is used for configuring a channel, a sending time slot and a receiving time slot of the radio frequency transceiver and retransmitting the broadcast data corresponding to the confirmation packet to the Bluetooth slave equipment according to the detection result sent by the confirmation packet detector.
A third aspect of the embodiments of the present invention provides a wireless communication system, where the wireless communication system includes a bluetooth master device and a bluetooth slave device as described in the second aspect of the embodiments of the present invention;
the Bluetooth slave device is used for receiving the broadcast data sent by the Bluetooth master device at preset receiving intervals and detecting whether the broadcast data sent by the Bluetooth master device is correctly received; and when detecting that the broadcast data sent by the Bluetooth master device is not correctly received, requesting the Bluetooth master device to retransmit the broadcast data and receiving the retransmitted broadcast data.
The invention has the following beneficial effects: the invention provides a data retransmission method aiming at point-to-multipoint broadcast transmission, which adds the function of feeding back incorrect receiving information after receiving broadcast data by Bluetooth slave equipment on the basis of the existing point-to-multipoint broadcast transmission mechanism. The characteristic that a plurality of Bluetooth slave devices adopt the same synchronous word to simultaneously transmit on the same channel is utilized, and whether the Bluetooth slave devices require data retransmission or not is judged according to the relation between the Bluetooth master devices and feedback data, so that automatic retransmission is realized to improve the reliability of point-to-multipoint broadcast transmission.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
fig. 1 is a flowchart of a data retransmission method according to embodiment 1 of the present invention;
fig. 2 is a flowchart of a data retransmission method according to embodiment 2 of the present invention;
fig. 3 is a schematic diagram of a timeslot structure of a CSB according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a bluetooth slave device according to embodiment 3 of the present invention;
fig. 5 is a flowchart illustrating the operation of the bluetooth slave device according to embodiment 3 of the present invention;
fig. 6 is a schematic diagram of a bluetooth master device according to embodiment 4 of the present invention;
fig. 7 is a flowchart illustrating the operation of the bluetooth master device according to embodiment 4 of the present invention;
fig. 8 is a schematic diagram of a wireless communication system according to embodiment 5 of the present invention.
Detailed Description
In order to make the technical solutions and advantages of the embodiments of the present invention more apparent, the following further detailed description of the exemplary embodiments of the present invention is provided with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and are not exhaustive of all the embodiments. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The data retransmission method, the bluetooth master device and the wireless communication system according to the present invention can be practically applied to any point-to-multipoint wireless transmission scenario, and for the convenience of understanding of those skilled in the art, the following embodiments are described by taking Connectionless Slave Broadcast (CSB) as an example, but are not limited to the CSB scenario.
Example 1
As shown in fig. 1, the present embodiment proposes a data retransmission method, where the method includes:
s101, sending broadcast data to Bluetooth slave equipment in a sending time slot at preset sending intervals;
s102, receiving a confirmation packet sent by Bluetooth slave equipment, wherein the confirmation packet comprises a synchronous word;
s103, detecting the confirmation packet to obtain a signal strength value and a synchronization word normalized correlation value;
and S104, determining retransmission broadcast data according to the signal intensity value and the normalized correlation value of the synchronous word.
The data retransmission method described in this embodiment is applied to a bluetooth master device, and may also be a CSB master device. First, the CSB master device transmits broadcast data to the CSB slave device in a transmission timeslot at a preset transmission interval, and the CSB slave device may feedback whether retransmission is required according to the procedure described in embodiment 1. And after receiving the retransmission request sent by the CSB slave device, the CSB master device judges whether the CSB master device really receives the retransmission request or not, and performs a data retransmission process according to a judgment result.
Specifically, the core point in the data retransmission method according to this embodiment is how to continue to determine whether retransmission is needed in the CSB master device. In the method described in this embodiment, the signal strength value and the synchronization word normalized correlation value are obtained by detecting the acknowledgement packet sent by the CSB slave device. And only when the signal strength value and the normalized correlation value of the synchronous word are both greater than the preset respective threshold values, the fact that the retransmission request sent by a certain CSB slave device is received is determined, and the subsequent retransmission process is carried out, otherwise, the data sending in the current sending interval is directly finished. In addition to this, when the number of times of retransmitting the broadcast data to the CSB slave device is equal to the preset number of retransmissions, the retransmission of the broadcast data to the CSB slave device is stopped.
Example 2
As shown in fig. 2, the present embodiment proposes a data retransmission method, where the method includes:
s201, receiving broadcast data sent by Bluetooth master equipment at preset receiving intervals;
s202, detecting whether the broadcast data sent by the Bluetooth master equipment is correctly received;
s203, when detecting that the broadcast data sent by the Bluetooth master device is not correctly received, requesting the Bluetooth master device to retransmit the broadcast data and receiving the retransmitted broadcast data.
The data retransmission method described in this embodiment is applied to a bluetooth slave device, which may also be referred to as a CSB slave device. In this embodiment, a data feedback mechanism is added to the CSB slave device, that is, the CSB slave device itself determines whether the bluetooth master device (that is, the CSB master device) needs to retransmit the broadcast data. In order to achieve the purpose, firstly, the CSB slave device receives CSB data sent by the CSB master device at a receiving slot at a preset receiving interval, then determines whether the CSB data is correctly received, and determines whether the CSB master device is required to retransmit the CSB data according to the determination result.
Specifically, after receiving the CSB data, it needs to be determined whether the CSB data is correctly received. The judgment is performed in the order of synchronous word detection, packet header detection and Cyclic Redundancy Check (CRC). For example, when the received CSB data passes all of the syncword detection, the packet header detection, and the cyclic redundancy detection, it indicates that the CSB slave device correctly receives the CSB data, and then the CSB master device does not need to retransmit the data, and the data transmission in the current reception interval is finished; and when the sync word of the broadcast data does not match, the packet header is received incorrectly or the cyclic redundancy check fails, it indicates that the CSB slave device has not correctly received the CSB data, and the CSB slave device sends an acknowledgement packet to the CSB master device at a sending timeslot to request the CSB master device to retransmit the data. Then, the CSB slave device receives the retransmitted data sent by the CSB master device again until the CSB slave device receives the broadcast data retransmitted by the CSB master device the number of times equal to the preset number of retransmissions or the number of retransmissions that can remain is zero, and ends reception.
The transmission time slots and the reception time slots of the CSB master and the CSB slave described in embodiments 1 and 2 are all corresponding, that is, the transmission time slot of the CSB master corresponds to the reception time slot of the CSB slave, and vice versa. To facilitate understanding of the slot structure of the CSB of the present invention, fig. 3 shows a slot of the CSB in the embodiment of the present application. As shown in fig. 3, where the solid-line long packet is a broadcast packet, i.e., CSB data, transmitted by the CSB master device according to the bluetooth CSB protocol, the CSB transmission interval is the "CSB transmission interval" shown in the figure. The CSB slave receives CSB data in its transmit slot, in other words, the CSB slave receives CSB data in its receive slot. Wherein the dashed small boxes represent acknowledgement packets sent by the CSB slave's transmit time slots. The dashed large box represents CSB data retransmitted by the CSB master. The retransmission time corresponding to the retransmission times does not exceed the "CSB transmission interval". The acknowledgement packet described in this embodiment includes a preamble and a sync word, and the sync word is generated according to the bluetooth address of the CSB master device, that is, the sync word of the acknowledgement packet sent by the CSB slave device is the same as the sync word of the CSB data packet sent by the CSB master device. In classic bluetooth, the synchronization word is the access code; in bluetooth low energy, the synchronization word is the access address. Therefore, the contents contained in the acknowledgement packet differ from one application scenario to another, but they are substantially the same.
Since all the CSB slaves transmit identical acknowledgement packets almost synchronously, and the synchronization words of the acknowledgement packets have good auto-correlation and cross-correlation properties, there is no mutual interference between the acknowledgement packets transmitted by multiple CSB slaves, i.e., the problem that the CSB master detects whether the acknowledgement packets exist is not affected. Due to signal fading and distance factors, the acknowledgment packets fed back by multiple CSB slaves have different strengths, and the acknowledgment packets of some CSB slaves may be masked by the acknowledgment packets of other CSB slaves, but the CSB master can automatically retransmit CSB data to all CSB slaves feeding back acknowledgment packets as long as it can detect the existence of the strongest acknowledgment packet.
Example 3
As shown in fig. 4, the present embodiment proposes a bluetooth master device, which includes an antenna, a radio frequency transceiver, a baseband processor, an acknowledgement packet detector, and a bluetooth protocol processor;
the radio frequency transceiver is used for modulating a baseband signal sent by the baseband processor into a radio frequency signal and sending the radio frequency signal to the Bluetooth slave equipment through the antenna, receiving an acknowledgement packet sent by the Bluetooth slave equipment and received by the antenna, and sending the acknowledgement packet to the acknowledgement packet detector, wherein the acknowledgement packet is a data packet generated by the fact that the Bluetooth slave equipment does not correctly receive the sent broadcast data and requests to retransmit the broadcast data;
the baseband processor is used for processing the broadcast data sent by the Bluetooth protocol processor and the confirmation packet sent by the radio frequency transceiver and converting the broadcast data and the confirmation packet into baseband signals;
the acknowledgement packet detector is used for receiving an acknowledgement packet which is transmitted by the radio frequency transceiver and converted into a baseband signal, and detecting the acknowledgement packet;
and the Bluetooth protocol processor is used for configuring a channel, a sending time slot and a receiving time slot of the radio frequency transceiver and retransmitting the broadcast data corresponding to the confirmation packet to the Bluetooth slave equipment according to the detection result sent by the confirmation packet detector.
The bluetooth master device described in this embodiment is a CSB master device. And in the time slot sent by the CSB master equipment, the Bluetooth protocol processor configures parameters such as a channel and a time slot of the radio frequency transceiver, sends the sending data to the baseband processor for processing, then sends the sending data to a sending channel of the radio frequency transceiver for modulation into a radio frequency signal, and finally sends the radio frequency signal to the CSB slave equipment through the antenna. In the receiving time slot, parameters such as a channel, a time slot and the like are configured through the Bluetooth protocol processor, wireless signals are converted into baseband signals through a receiving channel of the radio frequency transceiver after being received from the antenna, and the baseband signals are directly sent to the confirmation packet detector for processing. And sending the detection result of the acknowledgement packet detector to a Bluetooth protocol processor to judge whether retransmission is needed.
As shown in fig. 5, the CSB master device transmits broadcast data to the CSB slave device in a transmission timeslot at a preset transmission interval, and the CSB slave device may feedback whether retransmission is required according to the procedure described in embodiment 1 or embodiment 3. And after receiving the retransmission request sent by the CSB slave device, the CSB master device judges whether the CSB master device really receives the retransmission request or not, and performs a data retransmission process according to a judgment result.
Specifically, the core point of this embodiment is how to continue to determine whether retransmission is required in the CSB master device. In this embodiment, the signal strength value and the synchronization word normalized correlation value are obtained by detecting the acknowledgement packet sent by the CSB slave device. And only when the signal strength value and the normalized correlation value of the synchronous word are both greater than the preset respective threshold values, the fact that the retransmission request sent by a certain CSB slave device is received is determined, and the subsequent retransmission process is carried out, otherwise, the data sending in the current sending interval is directly finished. In addition to this, when the number of times of retransmitting the broadcast data to the CSB slave device is equal to the preset number of retransmissions, the retransmission of the broadcast data to the CSB slave device is stopped.
Example 4
As shown in fig. 6, the present embodiment proposes a bluetooth slave device, which includes a data transceiver module and a processor;
the data transceiver module is used for receiving broadcast data sent by the Bluetooth master device at preset receiving intervals;
the processor is configured with processor-executable operational instructions to perform operations comprising:
detecting whether the broadcast data sent by the Bluetooth master device is correctly received;
and when detecting that the broadcast data sent by the Bluetooth master device is not correctly received, requesting the Bluetooth master device to retransmit the broadcast data and receiving the retransmitted broadcast data.
Specifically, the bluetooth slave device described in this embodiment is substantially a CSB slave device, and in this embodiment, a data feedback mechanism is added to the CSB slave device, that is, the CSB slave device itself determines whether the bluetooth master device (that is, the CSB master device) needs to retransmit the broadcast data. In order to achieve the purpose, firstly, the CSB slave device receives CSB data sent by the CSB master device at a receiving slot at a preset receiving interval, then determines whether the CSB data is correctly received, and determines whether the CSB master device is required to retransmit the CSB data according to the determination result.
Specifically, as shown in fig. 7, after receiving the CSB data, it is necessary to determine whether the CSB data is correctly received. The judgment is performed in the order of synchronous word detection, packet header detection and Cyclic Redundancy Check (CRC). For example, when the received CSB data passes all of the syncword detection, the packet header detection, and the cyclic redundancy detection, it indicates that the CSB slave device correctly receives the CSB data, and then the CSB master device does not need to retransmit the data, and the data transmission in the current reception interval is finished; and when the sync word of the broadcast data does not match, the packet header is received incorrectly or the cyclic redundancy check fails, it indicates that the CSB slave device has not correctly received the CSB data, and the CSB slave device sends an acknowledgement packet to the CSB master device at a sending timeslot to request the CSB master device to retransmit the data. Then, the CSB slave device receives the retransmitted data sent by the CSB master device again until the CSB slave device receives the broadcast data retransmitted by the CSB master device the number of times equal to the preset number of retransmissions or the number of retransmissions that can remain is zero, and ends reception.
Example 5
As shown in fig. 8, this embodiment proposes a wireless communication system, which includes a bluetooth master device and at least one bluetooth slave device, where the bluetooth master device is a CSB master device, and the bluetooth slave device is a CSB slave device. The specific structures and working principles of the bluetooth master device and the bluetooth slave device may refer to those described in embodiments 3 and 4, and are not described herein again.
The wireless communication system described in this embodiment implements automatic retransmission by adding a feedback mechanism of a CSB slave device on the basis of the existing bluetooth CSB, thereby improving the reliability of bluetooth peer-to-peer broadcast data. Specifically, when the CSB slave device does not correctly receive the CSB data, the CSB slave device sends an acknowledgement packet to feed back information that the reception is incorrect when sending the slot. And the added CSB master device detects the acknowledgement packet fed back by the CSB slave device in the CSB master device receiving time slot, and judges whether to retransmit the CSB data or not by detecting the acknowledgement packet. In the CSB interval, the retransmission time slots of a plurality of CSBs are increased, so that the CSB data can be retransmitted when the CSB slave devices cannot correctly receive the CSB data, and the broadcasting reliability is improved.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (12)
1. A method of data retransmission, the method comprising:
transmitting broadcast data to a plurality of Bluetooth slave devices in a transmission time slot at preset transmission intervals;
when receiving an acknowledgement packet sent by a Bluetooth slave device in one receiving time slot corresponding to the sending time slot, retransmitting broadcast data corresponding to the acknowledgement packet to the Bluetooth slave device; wherein the sending time slot corresponds to the receiving time slot;
the confirmation packet is a signal generated by requesting retransmission of broadcast data transmitted in a transmission slot when the bluetooth slave device does not correctly receive the transmitted broadcast data, and the plurality of bluetooth slave devices synchronously transmit the same confirmation packet if the plurality of bluetooth slave devices do not correctly receive the transmitted broadcast data.
2. The method of claim 1, wherein after receiving the acknowledgement packet sent by the bluetooth slave device, before retransmitting the broadcast data corresponding to the acknowledgement packet to the bluetooth slave device, the method further comprises:
detecting the confirmation packet to obtain a signal strength value and a synchronous word/access address normalization correlation value;
and determining whether to retransmit the broadcast data according to the signal intensity value and the synchronization word/access address normalization correlation value.
3. The method according to claim 2, wherein the specific process of determining whether to retransmit the broadcast data according to the signal strength value and the sync word/access address normalized correlation value comprises:
and when the signal intensity value obtained by detecting the confirmation packet is greater than the preset signal intensity value and the synchronization word/access address normalized correlation value obtained by detecting the confirmation packet is greater than the preset synchronization word/access address normalized correlation value, determining that the confirmation packet passes the detection and retransmitting the broadcast data to the Bluetooth slave equipment in the retransmission time slot.
4. The method of claim 1, wherein before retransmitting the broadcast data corresponding to the acknowledgement packet to the Bluetooth slave device, the method further comprises:
judging whether the number of times of sending the retransmitted broadcast data to the Bluetooth slave equipment reaches a preset retransmission number;
and when the number of times of sending the retransmitted broadcast data to the Bluetooth slave equipment reaches the preset retransmission number, stopping retransmitting the broadcast data corresponding to the confirmation packet to the Bluetooth slave equipment.
5. The method according to claim 4, wherein the specific process of determining whether to retransmit the broadcast data according to the signal strength value and the sync word/access address normalized correlation value comprises:
and when the signal intensity value obtained by detecting the confirmation packet is smaller than the preset signal intensity value or the synchronization word/access address normalized correlation value obtained by detecting the confirmation packet is smaller than the preset synchronization word/access address normalized correlation value, determining not to retransmit the broadcast data and ending the transmission of the broadcast data of the Bluetooth slave device in the current transmission interval.
6. The method according to any one of claims 1 to 5, further comprising:
the Bluetooth slave equipment receives broadcast data sent by the Bluetooth master equipment at preset receiving intervals;
detecting whether the broadcast data sent by the Bluetooth master device is correctly received;
when detecting that the broadcast data sent by the Bluetooth master device is not correctly received, the Bluetooth slave device requests the Bluetooth master device to retransmit the broadcast data and receives the retransmitted broadcast data.
7. A Bluetooth master device, wherein the Bluetooth master device comprises an antenna, a radio frequency transceiver, a baseband processor, an acknowledgement packet detector and a Bluetooth protocol processor;
the radio frequency transceiver is used for modulating a baseband signal sent by the baseband processor into a radio frequency signal and sending the radio frequency signal to the Bluetooth slave equipment through the antenna, receiving an acknowledgement packet sent by the Bluetooth slave equipment and received by the antenna, and sending the acknowledgement packet to the acknowledgement packet detector, wherein the acknowledgement packet is a signal generated by requesting retransmission of broadcast data sent in a sending time slot when the Bluetooth slave equipment does not correctly receive the sent broadcast data, and a plurality of Bluetooth slave equipment synchronously send the same acknowledgement packet;
the baseband processor is used for processing the broadcast data sent by the Bluetooth protocol processor and the confirmation packet sent by the radio frequency transceiver and converting the broadcast data and the confirmation packet into baseband signals;
the acknowledgement packet detector is used for receiving an acknowledgement packet which is transmitted by the radio frequency transceiver and converted into a baseband signal, and detecting the acknowledgement packet;
the Bluetooth protocol processor is used for configuring a channel, a sending time slot and a receiving time slot of the radio frequency transceiver, and retransmitting broadcast data corresponding to the acknowledgement packet to the Bluetooth slave equipment when the acknowledgement packet sent by the Bluetooth slave equipment is received in one receiving time slot corresponding to the sending time slot according to the detection result sent by the acknowledgement packet detector; wherein the transmission time slot corresponds to the reception time slot.
8. The bluetooth master device of claim 7, wherein the acknowledgement packet detector is specifically configured to: and detecting the confirmation packet to obtain a signal strength value and a synchronous word/access address normalization related value, and sending the signal strength value and the synchronous word/access address normalization related value to a Bluetooth protocol processor.
9. The bluetooth master device of claim 8, wherein the bluetooth protocol processor is specifically configured to: and when the signal intensity value obtained by detecting the confirmation packet is greater than the preset signal intensity value and the synchronization word/access address normalized correlation value obtained by detecting the confirmation packet is greater than the preset synchronization word/access address normalized correlation value, determining that the confirmation packet passes the detection and retransmitting the broadcast data to the Bluetooth slave equipment in the retransmission time slot.
10. The bluetooth master device of claim 7, wherein the bluetooth protocol processor is further configured to:
before retransmitting the broadcast data corresponding to the confirmation packet to the Bluetooth slave equipment, judging whether the times of transmitting the retransmitted broadcast data to the Bluetooth slave equipment reach preset retransmission times or not;
and when the number of times of sending the retransmitted broadcast data to the Bluetooth slave equipment reaches the preset retransmission number, stopping retransmitting the broadcast data corresponding to the confirmation packet to the Bluetooth slave equipment.
11. The bluetooth master device of claim 10, wherein the bluetooth protocol processor is specifically configured to: and when the signal intensity value obtained by detecting the confirmation packet is smaller than the preset signal intensity value or the synchronization word/access address normalized correlation value obtained by detecting the confirmation packet is smaller than the preset synchronization word/access address normalized correlation value, determining not to retransmit the broadcast data and ending the transmission of the broadcast data of the Bluetooth slave device in the current transmission interval.
12. A wireless communication system, the wireless communication system comprising: the bluetooth master device and the bluetooth slave device of any one of claims 7 to 11;
the Bluetooth slave device is used for receiving broadcast data sent by a Bluetooth master device at preset receiving intervals, detecting whether the broadcast data sent by the Bluetooth master device is correctly received or not, and sending an acknowledgement packet when the sent broadcast data is not correctly received, wherein the acknowledgement packet is a signal generated by requesting retransmission of the broadcast data sent in a sending time slot when the Bluetooth slave device does not correctly receive the sent broadcast data, and a plurality of Bluetooth slave devices synchronously send the same acknowledgement packet; when detecting that the broadcast data sent by the Bluetooth master device is not correctly received, requesting the Bluetooth master device to retransmit the broadcast data and receiving the retransmitted broadcast data;
when the broadcast data sent by the Bluetooth master device is detected to be incorrectly received, the receiving time slot corresponding to the sending time slot is a receiving time slot corresponding to the receiving time slot;
wherein the transmission time slot corresponds to the reception time slot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810247392.XA CN108616819B (en) | 2018-03-23 | 2018-03-23 | Data retransmission method, Bluetooth main device and wireless communication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810247392.XA CN108616819B (en) | 2018-03-23 | 2018-03-23 | Data retransmission method, Bluetooth main device and wireless communication system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108616819A CN108616819A (en) | 2018-10-02 |
| CN108616819B true CN108616819B (en) | 2021-10-26 |
Family
ID=63658963
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810247392.XA Active CN108616819B (en) | 2018-03-23 | 2018-03-23 | Data retransmission method, Bluetooth main device and wireless communication system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108616819B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109587666B (en) * | 2018-11-22 | 2022-07-26 | 重庆物奇科技有限公司 | Bluetooth device, system and scheduling method |
| CN109803189B (en) * | 2019-01-24 | 2020-07-03 | 合肥星空物联信息科技有限公司 | Bluetooth headset based on BLE agreement |
| CN111490919A (en) * | 2019-01-29 | 2020-08-04 | 深圳市帝迈生物技术有限公司 | Master-slave machine system, equipment terminal and communication verification method thereof |
| CN113330757B (en) * | 2019-01-30 | 2023-09-01 | 华为技术有限公司 | Data transmission method and related device |
| CN112399391B (en) * | 2019-08-16 | 2024-03-19 | 合肥炬芯智能科技有限公司 | Bluetooth broadcast communication method and system, master device and slave device thereof |
| WO2021042287A1 (en) * | 2019-09-04 | 2021-03-11 | 深圳市汇顶科技股份有限公司 | Data synchronization method and apparatus, device, system, and storage medium |
| CN111556476B (en) * | 2020-04-17 | 2021-01-19 | 炬力(珠海)微电子有限公司 | Data transmission method between Bluetooth TWS (two way communication) devices and Bluetooth TWS devices |
| CN111818496B (en) * | 2020-06-24 | 2024-03-22 | 芯原微电子(上海)股份有限公司 | TWS earphone communication method and system based on carrier monitoring and TWS earphone |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6836862B1 (en) * | 2000-04-24 | 2004-12-28 | 3Com Corporation | Method of indicating wireless connection integrity |
| US7050402B2 (en) * | 2000-06-09 | 2006-05-23 | Texas Instruments Incorporated | Wireless communications with frequency band selection |
| CN106559739B (en) * | 2016-09-28 | 2020-03-20 | 深圳成谷科技有限公司 | Lightweight data transmission method suitable for Bluetooth low-power wireless communication system |
| CN106549737B (en) * | 2016-11-07 | 2019-08-23 | 清华大学 | A kind of data transmission method and device |
-
2018
- 2018-03-23 CN CN201810247392.XA patent/CN108616819B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN108616819A (en) | 2018-10-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108616818B (en) | Data retransmission method, bluetooth slave device and wireless communication system | |
| CN108616819B (en) | Data retransmission method, Bluetooth main device and wireless communication system | |
| US11804939B2 (en) | System and method for sidelink feedback | |
| US11012198B2 (en) | HARQ feedback method, apparatus and system | |
| CN110708142A (en) | Audio data communication method, system and equipment | |
| EP3685600B1 (en) | Performing a reliable broadcast to a plurality of nodes | |
| CN112039637B (en) | Audio data communication method, system and audio communication equipment | |
| CN111818496B (en) | TWS earphone communication method and system based on carrier monitoring and TWS earphone | |
| CN112055315B (en) | Bluetooth broadcast communication method, system and master device and slave device thereof | |
| EP3590296B1 (en) | Recipient usage indication for carrier frequency in bfd /ibfd | |
| US11777668B2 (en) | Method and apparatus for device-to-device communication based on a threshold | |
| JP2019526946A (en) | Data transmission method and apparatus | |
| WO2016172818A1 (en) | Response message transmission method and network device | |
| CN111385045B (en) | Audio data communication system | |
| US11856649B2 (en) | Addressing system for a wireless communication network | |
| CN116034593A (en) | Data transmission method and communication device applied to short-distance wireless communication | |
| CN110492977B (en) | Method and equipment for feeding back information and determining information receiving through feedback | |
| JP7089592B2 (en) | Information feedback methods and devices, computer storage media | |
| CN112399391B (en) | Bluetooth broadcast communication method and system, master device and slave device thereof | |
| CN112312329A (en) | Communication method and system based on Bluetooth broadcast, and master device and slave device thereof | |
| US20240146443A1 (en) | Communication method, apparatus, and device, and storage medium | |
| WO2023116348A1 (en) | Channel access method and device and storage medium | |
| US20240129907A1 (en) | Communication Method and Information Processing Apparatus | |
| US11589151B1 (en) | Audio data communication method and wireless audio system | |
| CN115835414A (en) | Side link communication method, communication node, and storage medium |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |