CN115884316A

CN115884316A - Method and device for searching master equipment in Bluetooth connectionless slave broadcast

Info

Publication number: CN115884316A
Application number: CN202111149030.5A
Authority: CN
Inventors: 马魁勇
Original assignee: Ju Li Zhuhai Microelectronics Co ltd
Current assignee: Ju Li Zhuhai Microelectronics Co ltd
Priority date: 2021-09-28
Filing date: 2021-09-28
Publication date: 2023-03-31

Abstract

The application relates to the technical field of Bluetooth communication, and provides a method and a device for searching master equipment in Bluetooth connectionless slave broadcasting. Specifically, after the broadcast data is sent by the master device in the CSB, the visibility window is opened immediately, so that the idle time in the CSB gap can be fully utilized, the time domain resource utilization rate is improved, and the start time of the visibility window can be prolonged by opening the visibility window immediately after the broadcast data is sent, so that the search speed of the slave device for the master device is increased to receive the broadcast data quickly, and further, the communication efficiency is improved.

Description

Method and device for searching master equipment in Bluetooth connectionless slave broadcast

Technical Field

The present application relates to the field of bluetooth communication technologies, and in particular, to a method and an apparatus for searching a master device in a bluetooth connectionless slave broadcast.

Background

In a bluetooth Connectionless Slave Broadcast (CSB), a Slave device searches for a master device through a visibility Window (Inquiry Scan Window) to receive Broadcast data transmitted by the master device. Wherein, the longer the opening time of the visibility window, the shorter the time required for the slave device to search for the master device.

Currently, the visibility window is typically opened regularly within the CSB interval. Therefore, in a certain CSB gap, the time when the visibility window is opened may not be reached after the data broadcast is completed, which may cause waste of time domain resources.

In order to reduce the waste of time domain resources, the opening time of the visibility window in the CSB gap is usually increased by reducing the CSB gap. However, when the CSB gap is small (e.g., 10 ms), the visibility window is small, which may result in a long time for the slave to search for the master, or even failure to search for the master, and thus failure to receive broadcast data.

Disclosure of Invention

The application provides a method and a device for searching master equipment in Bluetooth connectionless slave broadcasting, which are used for improving the searching speed of the master equipment by the slave equipment.

In a first aspect, the present application provides a method for searching a master device, which is applied to a bluetooth connectionless slave broadcast, and includes:

sending broadcast data to at least one slave device according to a preset CSB gap;

when the target time arrives, a visibility window is opened, so that the at least one slave device receives the broadcast data after searching the master device through the visibility window; and the target time is the time when the broadcast data is completely sent.

In the method for searching the master device, the master device in the Bluetooth CSB immediately opens the visibility window after the broadcast data is sent to at least one slave device, the idle time of the CSB gap for sending the broadcast data is fully utilized, and the opening time of the visibility window is prolonged, so that the speed of searching the master device from the slave device is increased, and the communication efficiency is further improved.

Optionally, a flag bit is set in each CSB gap, and a value of the flag bit is used to indicate whether to open the visibility window at the target time;

when the target time arrives, the visibility window is opened, and the method comprises the following steps:

acquiring a flag bit in each CSB gap;

and if the value of the flag bit is a first value, opening the visibility window when the target moment is reached.

In the method for searching the main equipment, the main equipment determines whether to open the visibility window immediately after the broadcast data is sent according to the value of the flag bit, and improves the flexibility of opening the visibility window on the basis of fully utilizing the idle time of the CSB gap; under the condition of meeting the communication requirement of the master device, the searching speed of the slave device to the master device can be increased as much as possible, and the receiving efficiency of the broadcast data is further improved.

Optionally, the method further includes:

and if the duration of the flag bit with the value of the second value is greater than a preset threshold, opening the visibility window at a preset opening moment, wherein the second value represents that the visibility window is not opened at the target moment.

In the method for searching the master device, when the duration of the flag bit with the value of the second value is greater than the preset threshold, the visibility window is opened according to the preset opening time, so that the slave device in the CSB can search the master device to perform normal communication.

Optionally, the broadcast data includes a null data packet.

In the method for searching the master device, when the broadcast data sent by the master device is an empty data packet, the time for opening the visibility window is longer, and the slave device can search the master device more easily.

In a second aspect, the present application provides a master device for bluetooth connectionless slave broadcast CSB, comprising:

a sending module, configured to send broadcast data to at least one slave device according to a preset CSB gap;

the starting module is used for starting a visibility window when a target moment arrives, so that the at least one slave device receives the broadcast data after searching the master device through the visibility window; and the target time is the time when the broadcast data is completely sent.

Optionally, a flag bit is arranged in each CSB gap, and a value of the flag bit is used to indicate whether to open the visibility window at a target time;

the starting module is specifically used for:

acquiring a flag bit in each CSB gap;

Optionally, the starting module is further configured to:

Optionally, the broadcast data includes a null data packet.

In a third aspect, the present application provides an electronic device applied to a bluetooth connectionless slave broadcast CSB, comprising a memory, a processor, and at least one external communication interface, wherein:

the at least one external communication interface is used for carrying out Bluetooth communication with at least one slave device;

the memory has stored thereon a computer program which, when executed by the processor, implements the method of any of the first aspects.

In a fourth aspect, the present application provides a computer readable storage medium having stored thereon computer instructions which, when run on a computer, cause the computer to perform the method of any of the first aspects.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

FIG. 1 illustrates a system architecture diagram provided by an embodiment of the present application;

fig. 2 is a flowchart illustrating a searching method for a master device in a CSB according to an embodiment of the present application;

FIG. 3A is a diagram illustrating a timeline of an open visibility window provided by an embodiment of the application;

FIG. 3B is a diagram illustrating a timeline of another open visibility window provided by an embodiment of the present application;

fig. 3C is a schematic diagram illustrating a time axis of opening a visibility window when a null data packet is provided according to an embodiment of the present application;

FIG. 4 is a diagram illustrating a time axis for opening a visibility window via a flag according to an embodiment of the present application;

fig. 5 is a functional block diagram illustrating a CSB master device according to an embodiment of the present disclosure;

fig. 6 illustrates a hardware structure diagram of a CSB master device according to an embodiment of the present disclosure.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application clearer, the present application will be described in further detail with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

All other embodiments, which can be derived by a person skilled in the art from the exemplary embodiments shown in the present application without inventive effort, shall fall within the scope of protection of the present application. Moreover, while the disclosure herein has been presented in terms of exemplary one or more examples, it is to be understood that each aspect of the disclosure can be utilized independently and separately from other aspects of the disclosure to provide a complete disclosure.

It should be understood that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used are interchangeable under appropriate circumstances and can be implemented in sequences other than those illustrated or otherwise described herein with respect to the embodiments of the application, for example.

Furthermore, the terms "comprises" and "comprising," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a product or device that comprises a list of elements is not necessarily limited to those elements explicitly listed, but may include other elements not expressly listed or inherent to such product or device.

The term "module," as used herein, refers to any known or later developed hardware, software, firmware, artificial intelligence, fuzzy logic, or combination of hardware and/or software code that is capable of performing the functionality associated with that element.

In the existing Bluetooth CSB, a visibility window cannot be opened in time in the idle time of a CSB gap, so that time domain resources are wasted, and the visibility window is also reduced while the resource utilization rate is improved by reducing the CSB gap, so that the searching speed of the slave equipment to the master equipment is influenced.

In view of this, embodiments of the present application provide a method and an apparatus for searching a master device in bluetooth connectionless slave broadcast, where a visibility window is opened immediately after broadcast data is sent, so as to improve a resource utilization rate, and the visible window is opened immediately after broadcast data is sent, so that the opening time of the visibility window is prolonged and the searching speed of the master device by a slave device is improved without affecting a CSB normal broadcast.

While ensuring the search speed of the CSB slave device to the master device, the embodiment of the application sets a flag bit in each CSB gap, and the master device determines whether to open the visibility window immediately after the broadcast data is sent according to the value of the flag bit, so as to control the distribution of the visibility window to adapt to the requirements of different scenes.

For clarity of description of the embodiments of the present application, explanations are given below for the nouns of the present application.

Connectionless slave broadcast: the master device broadcasts data to at least one slave device such that the master device may be capable of bluetooth communication with a plurality of slave devices.

Embodiments of the present application are described in detail below with reference to the accompanying drawings.

FIG. 1 illustrates a system architecture diagram provided by an embodiment of the present application; as shown in fig. 1, wireless terminals 10 (including but not limited to 101-107 in fig. 1) communicate with each other via bluetooth protocol, wherein one of the wireless terminals is a master device 101, and the other wireless terminals are slave devices (102-107), and the slave devices receive broadcast data transmitted by the master device by searching for the master device.

It should be noted that fig. 1 is merely an example, and the wireless device 10 is not limited by the embodiments of the present application and may include a cellular phone, a smart phone, a Session Initiation Protocol (SIP) phone, a mobile Station (STA), a laptop, a Personal Computer (PC), a desktop computer, a Personal Digital Assistant (PDA), a satellite radio, a global positioning system, a multimedia device, a video device, a digital audio player (e.g., MP3 player), a camera, a game console, a tablet computer, a smart device, a wearable device (e.g., a smart watch, a wireless headset, etc.), a vehicle, an electrical meter, an air pump, a toaster, a thermostat, a hearing aid, a body-worn blood glucose control unit, an internet of things (IoT) device, or any other similar functional device.

Based on the system architecture diagram shown in fig. 1, fig. 2 schematically shows a flowchart of a method for searching for a master device according to an embodiment of the present application, which is applied to the bluetooth CSB system shown in fig. 1, where the flowchart is executed by the master device in the system and mainly includes the following steps:

s201: and transmitting the broadcast data to at least one slave device according to the preset CSB interval.

The main device adopts a Bluetooth protocol and sends broadcast data according to a preset CSB interval. The type of broadcast data is not a limiting requirement of the present application and includes, but is not limited to, audio data, video data, text, pictures, and the like.

S202: when the target moment arrives, a visibility window is opened, so that the at least one slave device receives broadcast data after searching the master device through the visibility window; wherein, the target time is the time when the broadcast data is completely transmitted.

As shown in fig. 3A, for a time axis diagram of opening a visibility window, in each CSB slot, a master device may send 2 data packets of broadcast data, and when the sending of the 2 data packets is completed (that is, a target time arrives), the visibility window is immediately opened without waiting for a preset opening time of the visibility window.

It should be noted that the number of packets of broadcast data in each CSB slot in fig. 3A is only an example, in practical applications, 1 to N packets may be sent in each CSB slot, where N is an integer greater than 1, and the number of packets that may be sent in each CSB slot may be different, as shown in fig. 3B.

In some embodiments, when the broadcast data sent by the master device is invalid data, i.e. a NULL data packet (NULL) is sent, as shown in fig. 3C, the visibility window is opened for a longer time in the CSB gap, and the slave device can search for the master device more easily.

In the above embodiment, after the broadcast data is sent, the main device immediately opens the visibility window, and makes full use of the idle time (i.e., the time when the broadcast data is not sent) in the CSB gap to improve the resource utilization rate, and moreover, immediately opens the visibility window after the broadcast data is sent, so that the start time of the visibility window can be prolonged, thereby improving the search speed of the slave device for the main device, quickly receiving the broadcast data, and improving the communication efficiency.

In some practical application scenarios, the broadcast data sent by the master device may be its own broadcast data or broadcast data transmitted by other bluetooth devices to the master device, that is, during the idle time of the CSB slot, the master device may communicate with other bluetooth devices to receive data to be broadcast, besides opening the visibility window, and at this time, a part of communication time needs to be left for the master device during the idle time.

In order to adapt to the above scenario, in the embodiment of the present application, a flag is set in each CSB gap, which is denoted as scan _ flag, and when the master device communicates with other bluetooth devices, a value of the flag is set to 0, and when the master device does not communicate with other bluetooth devices, a value of the flag is set to 1, and different values of the flag may be used to indicate whether to open a visibility window at a target time.

In specific implementation, the main device obtains a flag bit in each CSB gap, determines a value of the flag bit, opens a visibility window when the target time is reached if the value of the flag bit is a first value (namely, scan _ flag = 1), and does not open the visibility window when the target time is reached if the value of the flag bit is a second value (namely, scan _ flag = 0).

For example, as shown in fig. 4, when scan _ flag =1, the master device opens the visibility window at the target time, and when scan _ flag =0, the master device does not open the visibility window at the target time.

In some embodiments, if the duration of the value of the index bit being the second value (i.e., scan _ flag = 0) is greater than the preset threshold, the master device opens the visibility window according to the preset opening time of the visibility window in the CSB gap, so as to ensure that the master device that can be searched by other slave devices in the CSB performs normal communication.

It should be noted that the preset threshold represents a time lower limit for opening the visibility window according to a preset opening time, and the size of the preset threshold can be set according to actual requirements. The preset starting time represents the time for starting the visibility window in the CSB gap, and the preset starting time can be set according to the size of the CSB gap and the size of the data packet.

In the above embodiment, the flag bit is set according to the actual situation, and the main device determines whether to open the visibility window immediately after the broadcast data is sent according to the value of the flag bit, so that the flexibility of opening the visibility window is improved on the basis of fully utilizing the idle time of the CSB gap; under the condition of meeting the communication requirement of the master device, the searching speed of the slave device to the master device can be increased as much as possible, particularly when the CSB gap is short, the starting duration of a visibility window is increased to the maximum extent while the communication time is reserved for the master device in the idle time by setting the zone bit, so that the time required by the slave device to search the master device is reduced, the searching speed of the slave device to the master device is increased, the receiving efficiency of broadcast data is increased, and the user experience is improved.

Based on the same technical concept, the embodiment of the application provides the main device, which is applied to the bluetooth CSB, and the display device can execute the main device searching method in the embodiment, and can achieve the same technical effect.

Referring to fig. 5, the master device includes a sending module 501, a starting module 502;

a sending module 501, configured to send broadcast data to at least one slave device according to a preset CSB gap;

an opening module 502, configured to open a visibility window when a target time arrives, so that the at least one slave device receives the broadcast data after searching for a master device through the visibility window; and the target time is the time when the broadcast data is completely sent.

the starting module 502 is specifically configured to:

acquiring a flag bit in each CSB gap;

Optionally, the starting module 502 is further configured to:

and if the duration of the flag bit with the value of the second value is greater than a preset threshold, opening the visibility window at a preset opening time, wherein the second value represents that the visibility window is not opened at a target time.

Optionally, the broadcast data includes a null data packet.

Based on the same technical concept, the embodiment of the present application provides a host device, as shown in fig. 6, the host device includes a processor 601, a memory 602, and at least one external communication interface 603; the processor 601, the memory 602, and the external communication interface 603 are connected by a bus 604. At least one external communication interface 603 for bluetooth communication with at least one slave device; the memory 602 stores a computer program, and the processor 601 realizes the aforementioned searching method of the master device when executing the computer program, and can achieve the same technical effects.

For one embodiment, the number of the processors 601 may be one or more, and the processor 801 and the memory 602 may be coupled or relatively independent.

Based on the same technical concept, embodiments of the present application further provide a computer-readable storage medium storing computer instructions, which, when executed on a computer, cause the computer to perform the method for searching for a master device as discussed above.

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 the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations 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.

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

1. A method for searching a master device, applied to a Bluetooth connectionless Slave broadcast CSB, comprises the following steps:

transmitting broadcast data to at least one slave device according to a preset CSB gap;

2. The method of claim 1, wherein a flag bit is disposed in each CSB slot, and a value of the flag bit is used to indicate whether to open the visibility window at the target time;

acquiring a flag bit in each CSB gap;

3. The method of claim 2, wherein the method further comprises:

and if the duration of the flag bit taking the second value is greater than a preset threshold, opening the visibility window at a preset opening time, wherein the second value represents that the visibility window is not opened at the target time.

4. The method of any of claims 1-3, wherein the broadcast data comprises null packets.

5. A master device for use in a bluetooth connectionless slave broadcast CSB, comprising:

the starting module is used for starting a visibility window when a target moment arrives, so that the at least one slave device receives the broadcast data after searching the master device through the visibility window; and the target time is the time when the broadcast data is sent.

6. The master device of claim 5, wherein a flag bit is disposed within each CSB slot, a value of the flag bit indicating whether to open the visibility window at the target time;

the starting module is specifically configured to:

acquiring a flag bit in each CSB gap;

7. The master device of claim 6, wherein the enabling module is further to:

8. The method of any of claims 5-7, wherein the broadcast data comprises null packets.

9. An electronic device comprising a memory, a processor and at least one external communication interface, wherein the electronic device is applied to a Bluetooth connectionless slave broadcast CSB:

the memory has stored thereon a computer program which, when executed by the processor, implements the method of any of claims 1-4.

10. A computer-readable storage medium having stored thereon computer instructions which, when executed on a computer, cause the computer to perform the method of any one of claims 1-4.