KR20080108785A - Method of detecting a bluetooth device and host bluetooth device for performing the same - Google Patents

Abstract

A bluetooth device searching method and a host bluetooth device for implementing the same are provided to reduce unnecessary searching time by terminating a search process of the bluetooth device before a predetermined search time. A host blue tooth device(200) broadcast search signal. A bluetooth module(904) searches neighboring bluetooth devices through search response signal outputted from the neighboring bluetooth devices in response of search response signal. A display unit(908) displays search result. A blue tooth device searching procedure is terminated if the repetition search frequency of neighboring blue tooth devices is greater than a critical value.

Description

TECHNICAL OF DETECTING A BLUETOOTH DEVICE AND HOST BLUETOOTH DEVICE FOR PERFORMING THE SAME}

1 is a view illustrating a conventional Bluetooth device search method.

2 is a flowchart illustrating a method for connecting a Bluetooth device according to an embodiment of the present invention.

3 illustrates a method for selecting a Bluetooth connection according to an embodiment of the present invention.

4 is a view showing a Bluetooth device search results according to an embodiment of the present invention.

5 is a flowchart illustrating a Bluetooth device discovery process according to an embodiment of the present invention.

FIG. 6 is a plan view illustrating a table related to search results and threshold settings during the search process of FIG. 5.

7 is a flowchart illustrating a process of rescanning a Bluetooth device according to an exemplary embodiment of the present invention.

8 is a flowchart illustrating a process of rescanning a Bluetooth device according to an exemplary embodiment of the present invention.

9 is a block diagram illustrating a host Bluetooth device according to an exemplary embodiment of the present invention.

The present invention relates to a Bluetooth device searching method and a host Bluetooth device for performing the same. More particularly, the present invention relates to a Bluetooth device for terminating the Bluetooth device searching process when it is determined that there is no Bluetooth device to be searched even before a preset search time. A search method and a host Bluetooth device for performing the same.

Bluetooth communication is a wireless communication method based on short-range radio technology that operates in the 2.4GHz ISM frequency band without permission worldwide. The Bluetooth device using the Bluetooth communication transmits voice and data at a speed of up to 1 Mbps to another Bluetooth device located within a radius of 10M through Bluetooth communication. Here, since Bluetooth communication has a very small power consumption due to its characteristics, Bluetooth communication is widely used in mobile phones and the like.

Hereinafter, a process of a specific Bluetooth device (host Bluetooth device) searching for other Bluetooth devices in the vicinity thereof will be described with reference to the accompanying drawings.

1 is a view illustrating a conventional Bluetooth device search method.

Referring to FIG. 1, the host Bluetooth device 100 broadcasts an inquiry signal to search for Bluetooth devices such as a mobile phone 102, a notebook 104, a headset 106, and the like in the vicinity thereof. )do.

Subsequently, peripheral Bluetooth devices 102, 104, and 106 are inquiry having information about their Bluetooth device address (BD address) and a class of device (COD) in response to the inquiry signal. response signal) to the host Bluetooth device 100.

Subsequently, the host Bluetooth device 100 analyzes the inquiry response signals to search for Bluetooth devices 102, 104, and 106 in the vicinity thereof, and attempts to connect to the desired Bluetooth device.

However, in the conventional Bluetooth device searching method, an inquiry signal is continuously broadcast for a preset search time (a time generally determined in the Bluetooth specification) to search for peripheral Bluetooth devices 102, 104, and 106. As a result, the Bluetooth devices 102, 104, and 106 once found are searched continuously. In particular, the conventional Bluetooth device search method continuously searches for neighboring Bluetooth devices during the search time even though there are no more Bluetooth devices to be searched. Therefore, the time required for searching for a Bluetooth device tends to be wasted unnecessarily.

An object of the present invention is to provide a Bluetooth device search method for reducing the time for searching for a Bluetooth device and a host Bluetooth device for performing the same.

In order to achieve the above object, the host Bluetooth device according to an embodiment of the present invention includes a Bluetooth module and a display unit. The Bluetooth module broadcasts an inquiry signal and searches for peripheral Bluetooth devices through an inquiry response signal output from the peripheral Bluetooth device in response to the inquiry signal. The display unit displays the search result. In this case, the Bluetooth module terminates the Bluetooth device search process when the number of repeated search (Cnt) of the peripheral Bluetooth devices repeatedly searched until a new peripheral Bluetooth device is found is greater than a threshold value.

The Bluetooth device searching method according to an embodiment of the present invention comprises the steps of setting a threshold value, broadcasting an inquiry signal (broadcasting an inquiry signal), and at least one inquiry response output in response to the inquiry signal. Searching for peripheral Bluetooth devices via an inquiry response signal. Here, when the number of repetitive searches (Cnt) of the peripheral Bluetooth devices repeatedly searched until the new peripheral Bluetooth device is found is greater than the threshold value, the peripheral Bluetooth device search process is terminated.

The Bluetooth device searching method according to the present invention and the host Bluetooth device for performing the same terminates the Bluetooth device searching process when it is determined that the Bluetooth device to be searched no longer exists even before a preset search time in the host Bluetooth device. . Therefore, unnecessary search time can be shortened.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a flowchart illustrating a method for connecting a Bluetooth device according to an exemplary embodiment of the present invention, and FIG. 3 is a diagram illustrating a method for selecting a Bluetooth connection according to an exemplary embodiment of the present invention. 4 is a view showing a Bluetooth device search results according to an embodiment of the present invention. Here, the host Bluetooth device 200 and HD search for peripheral Bluetooth devices, and five peripheral Bluetooth devices D1 to D5 and 202 to 210 are searched for in the vicinity of the host Bluetooth device HD and 200. Assume that it exists.

The Bluetooth devices 200, 202, 204, 206, 208, and 210 of the present embodiment are devices having a Bluetooth communication function, and include cellular phones, personal communication phones (PCSs), and personal information terminals (PCS). Personal Data Assistant (PDA), International Mobile Communication-2000 (IMT-2000) terminal, Personal Computer (PC), Headset (Headset) and the like. That is, the Bluetooth devices 200, 202, 204, 206, 208, and 210 are not limited as long as they have a Bluetooth function.

Hereinafter, the Bluetooth device connection process of the present embodiment will be described in detail.

2 and 3, the user selects the Bluetooth connection menu 5 from among a plurality of menus displayed on the display unit of the host Bluetooth device 200. Here, the setting and selection method of the menus may vary according to the setting of the manufacturer, the telecommunication company and the user.

Subsequently, the host Bluetooth device HD 200 broadcasts an inquiry signal according to the selection (S200). In other words, the host Bluetooth device HD 200 outputs an inquiry signal in all directions to search for Bluetooth devices in the vicinity thereof. Here, the inquiry signal is a signal for requesting a Bluetooth device address (BD address) and a class of device (COD) of the peripheral Bluetooth devices 202 to 210.

Subsequently, the peripheral Bluetooth devices 202, 204, 206, 208, and 210 that have received the inquiry signal have information about their BD address and model in response to the received inquiry signal. An inquiry response signal (inquiry response signal) is transmitted to the host Bluetooth device 200, respectively (S202, S204, S206, S208 and S210).

Subsequently, the host Bluetooth device 200 transmits the Bluetooth devices 202, 204, 206, 208 and 210 in its vicinity through inquiry response signals transmitted from the peripheral Bluetooth devices 202, 204, 206, 208 and 210. Find out the current status and add the result to the Bluetooth device search list.

That is, the host Bluetooth device 200 searches for the Bluetooth devices 202, 204, 206, 208, and 210 located in the vicinity thereof through the transmission of the inquiry signal and the reception of the inquiry response signal. Here, the Bluetooth device searching method continuously broadcasts an inquiry signal to the host Bluetooth device 200 for a preset search time (a time generally determined in the Bluetooth specification), so that the Bluetooth device that has already been searched may be repeatedly searched. . However, unlike the conventional Bluetooth device search method, the Bluetooth device search method of the present embodiment does not continuously search for neighboring Bluetooth devices during the search time, but there are no Bluetooth devices to be searched even before the search time expires. If it is determined that the Bluetooth device search is terminated. Therefore, the Bluetooth device searching method of the present embodiment can shorten the Bluetooth device searching time. This search method will be described below with reference to the accompanying drawings.

Hereinafter, the Bluetooth device connection method of the present embodiment will be described in detail.

Referring back to FIG. 2, the host Bluetooth device 200 transmits a service discovery profile signal (SDP signal) to the searched Bluetooth devices 202, 204, 206, 208, and 210, respectively (S212).

Subsequently, the peripheral Bluetooth devices 202, 204, 206, 208, and 210 transmit a service response signal (SDP response signal) having information about a service provided by the host Bluetooth device (SDP) in response to the transmitted SDP signal. 200) (S214 and S216). Here, according to another embodiment of the present invention, the SDP response signal may include not only the service but also information on the name (eg, EVER) of the Bluetooth device.

Subsequently, the host Bluetooth device 200 determines a service provided by the peripheral Bluetooth devices 202, 204, 206, 208, and 210 through the transmitted SDP response signals.

Subsequently, the host Bluetooth device 200 stores the Bluetooth device search results, and then displays the search results to the user through the display unit as shown in FIG. 4. In this case, when the user selects one of the found Bluetooth devices 202, 204, 206, 208, and 210, the host Bluetooth device 200 may display a unique address (BD address), a model (COD), and a service of the corresponding Bluetooth device. The type is displayed to the user, so that the user can grasp information about the Bluetooth devices 202, 204, 206, 208 and 210. For example, when the user selects the Bluetooth device ②, the host Bluetooth device 200 displays to the user that the Bluetooth device ② provides a call service as a headset.

Subsequently, when the user selects a connection to one of the discovered Bluetooth devices 202, 204, 206, 208 and 210, the host Bluetooth device 200 assigns a pin code (eg, ' 0000 ') is transmitted (S218). Hereinafter, for convenience of explanation, it will be assumed that the selected Bluetooth device is the peripheral Bluetooth device 204.

The peripheral Bluetooth device 204 determines whether or not the pin code transmitted from the host Bluetooth device 200 matches the pin code it has (S220).

If the pin codes do not match, the peripheral Bluetooth device 204 and the host Bluetooth device 200 are not connected through Bluetooth communication. However, there may be various methods of matching the pin codes, and thus, when the pin codes are matched through other methods, the peripheral Bluetooth device 204 and the host Bluetooth device 200 may be connected by Bluetooth communication.

On the other hand, when the pin codes match, the peripheral Bluetooth device 204 transmits an ACK signal ACK having information that the pin codes match to the host Bluetooth device 200 (S222). In addition, the peripheral Bluetooth device 204 generates a link key using the pin code, and then stores the link key (S224).

Subsequently, the host Bluetooth device 200 generates a link key using the pin code according to the transmitted ACK signal and then stores the link key (S226).

Subsequently, the host Bluetooth device 200 and the peripheral Bluetooth device 204 exchange link keys with each other (S228). When the link keys are disconnected between the host Bluetooth device 200 and the peripheral Bluetooth device 204 and want to be connected again, the link keys serve as a link so that they can be directly connected to each other without going through the Bluetooth device search process as described above.

Subsequently, the host Bluetooth device 200 and the peripheral Bluetooth device 204 are connected by Bluetooth communication (S230). As a result, the host Bluetooth device 200 and the peripheral Bluetooth device 204 may exchange data with each other using Bluetooth communication.

Hereinafter, a Bluetooth device searching process will be described in detail with reference to the accompanying drawings.

FIG. 5 is a flowchart illustrating a Bluetooth device search process according to an exemplary embodiment of the present invention, and FIG. 6 is a plan view illustrating a table related to a search result and a threshold value setting during the search process of FIG. 5. However, with reference to FIG. 5, the overall content of the Bluetooth device searching process of the present embodiment will be described in detail, and then the Bluetooth device searching process will be described in detail with reference to FIG.

Referring to FIG. 5, the host Bluetooth device 200 broadcasts an inquiry signal (S500).

Subsequently, the peripheral Bluetooth devices 202, 204, 206, 208, and 210 that receive the inquiry signal transmit an inquiry response signal to the host Bluetooth device 200, and the host Bluetooth device 200 transmits the inquiry. Through the response signals, Bluetooth devices located around them are found (S502).

Subsequently, it is determined whether the currently found Bluetooth device is a Bluetooth device that has already been found (S504).

If the presently discovered Bluetooth device is not a Bluetooth device that has already been discovered, for example when D4 208 is first discovered and then D1 202 is found, as shown in FIG. Add to the list of Bluetooth devices (S510). Then, it is determined whether the number of repetitive retrieval times Cnt is greater than the maximum repetitive retrieval number Max Cnt (S512). Here, the number of repetitive searches (Cnt) means the number of searches of the Bluetooth devices repeatedly found until a new Bluetooth device is found, and the maximum number of repetitive searches (Cnt) is the maximum value of the number of repetitive searches (Cnt) generated so far. Means.

If the repetition search count Cnt is less than or equal to the maximum repetition search count Max Cnt, the repetition search count Cnt is reset to 0 (S514), and the step S500 is performed again.

On the other hand, when the repetition search count Cnt is greater than the maximum repetition search count Max Cnt, the current repetition search count Cnt is reset to the maximum repetition search count Max Cnt, and the threshold is reset to the first value ( increase by?), the repetition search count Cnt is reset to 0 (S516), and step S500 is performed again. According to another embodiment of the present invention, the threshold may not be increased even when the repetition search count Cnt is greater than the maximum repetition search count Max Cnt.

If the currently found Bluetooth device is a Bluetooth device that has already been found, the number of repetitive searches Cnt is increased by 1 (S506).

Subsequently, it is determined whether or not the number of repetitive searches Cnt is greater than the threshold (S508). In this case, the threshold value is a value used as a reference for terminating the Bluetooth device searching process.

If the number of repetitive searches (Cnt) is greater than the threshold, the Bluetooth device search process is terminated.

On the other hand, when the repetition search count Cnt is less than or equal to the threshold value, step S500 is performed again.

Hereinafter, the reason for executing the Bluetooth device discovery process as described above will be described with reference to the table of FIG. 6. Here, the initial threshold value is set to 3, and the first value α is assumed to be 1.

First, D4 208 is found, and then second, D1 202 is found. In this case, since D1 202 is a newly found element, the repetition count Cnt is reset to zero. Here, the maximum repetition retrieval count Max Cnt is zero. That is, since the repetition retrieval number Cnt is not greater than the maximum repetition retrieval number Max Cnt, the retrieval signal is broadcast after only the repetition retrieval number Cnt is reset to 0, that is, the Bluetooth device retrieval process is performed again.

Then, thirdly, D4 208 is found again after the first time it is found, so the iteration search count Cnt is increased by one to be one. In this case, since the number of repetitive searches Cnt is smaller than the threshold value, the Bluetooth device search process is performed again.

Subsequently, fourthly, D3 206 is newly discovered for the first time. In this case, the number of repetitive searches (Cnt) is 1, the maximum number of repetitive searches (Max Cnt) is 0, and the maximum number of repetitive searches (Max Cnt) because the number of repetitive searches (Cnt) is greater than the maximum repetitive searches (Max Cnt). Is reset to 1, the current iteration search count (Cnt) value. In addition, the threshold value is increased by the first value α to be 4, and the number of repetitive searches Cnt is reset to zero. In this case, increasing the threshold value means that the number of repetitive searches (Cnt) of Bluetooth devices found repeatedly until a new Bluetooth device is found is larger than the existing maximum repetition search number (Max Cnt), so that there are other Bluetooth devices that are not searched. Because of the expectation that it can Of course, the host Bluetooth device 200 may not increase the threshold even when the number of repetitive searches Cnt is greater than the maximum number of repetitive searches Max Cnt.

Subsequently, the fifth time D1 202 is found again, so the iterative search count Cnt is increased by one to be one. In this case, since the number of repetitive searches Cnt is smaller than the threshold value, the Bluetooth device search process is performed again.

Subsequently, sixth, D4 208 is found again, so the iteration search count Cnt is increased by one to two. In this case, since the number of repetitive searches Cnt is smaller than the threshold value, the Bluetooth device search process is performed again.

Subsequently, seventh, D1 202 is found again, so that the number of repetitive searches Cnt is increased by one to three. In this case, since the number of repetitive searches Cnt is smaller than the threshold value, the Bluetooth device search process is performed again.

Subsequently, eighth, D5 210 is newly discovered. In this case, the number of repetitive searches (Cnt) is 3, the maximum number of repetitive searches (Max Cnt) is 1, and the maximum number of repetitive searches (Cnt) is greater than the maximum repetitive searches (Max Cnt). Is reset to 3, the current iteration search count (Cnt) value. In addition, the threshold value is increased by the first value α to be 5, and the repetition search count Cnt is reset to zero.

Subsequently, the Bluetooth devices that were previously searched are searched again from the ninth to fourteenth, and the number of repetitive searches (Cnt) is six. In this case, since the number of repetitive searches (Cnt) is 6 and larger than a threshold value of 5, the Bluetooth device searching process ends even though the search time preset in the host Bluetooth device 200 has not elapsed.

In short, the Bluetooth device searching method of the present invention is automatically terminated when the same Bluetooth devices are continuously searched even if the preset searching time has not elapsed and the number of repetitive searching Cnt becomes larger than the threshold. Therefore, unnecessary search time can be shortened.

According to another embodiment of the present invention, the initial threshold may be maintained during the Bluetooth device discovery process. Also, the maximum repetition retrieval number Max Cnt may be continuously maintained after being initially set without changing.

Through the above process, peripheral Bluetooth devices have been searched, but a desired Bluetooth device may not be found, or a peripheral Bluetooth device may not be found at all. In this case, the user may rescan the peripheral Bluetooth device through the host Bluetooth device 200. Hereinafter, the Bluetooth device rescanning process will be described in detail.

7 is a flowchart illustrating a process of rescanning a Bluetooth device according to an exemplary embodiment of the present invention.

Referring to FIG. 7, the host Bluetooth device 200 sets a search time and an initial threshold value (S700).

Subsequently, the host Bluetooth device 200 broadcasts an inquiry signal and receives inquiry response signals transmitted in response to the inquiry signal (S702).

Subsequently, the host Bluetooth device 200 displays information on Bluetooth devices searched through the received inquiry response signals, that is, search results (S704).

Subsequently, it is determined whether the Bluetooth device rescan is selected by the user (S706).

When the rescanning of the Bluetooth device is not selected, the Bluetooth device retrieval process may be terminated or the host Bluetooth device 200 may be connected to the specific Bluetooth device by the user selecting a specific Bluetooth device (S708).

On the other hand, when the Bluetooth device re-search is selected, the initial threshold value at the time of the re-search is set to a value larger by a second value β than the above initial threshold value (S710). This is to search for the peripheral Bluetooth devices located in the vicinity of the host Bluetooth device 200 for a longer time than the previous search in order to search for the desired Bluetooth device because the last search did not find the desired Bluetooth device.

Subsequently, the host Bluetooth device 200 broadcasts an inquiry signal and receives inquiry response signals transmitted in response to the inquiry signal (S712).

Subsequently, the host Bluetooth device 200 displays information on Bluetooth devices searched through the received inquiry response signals, that is, search results (S714).

8 is a flowchart illustrating a process of rescanning a Bluetooth device according to an exemplary embodiment of the present invention.

Referring to FIG. 8, the host Bluetooth device 200 sets a search time, an initial threshold value, and a first value α (S800).

Subsequently, the host Bluetooth device 200 broadcasts an inquiry signal and receives inquiry response signals transmitted in response to the inquiry signal (S802).

Subsequently, the host Bluetooth device 200 displays information on Bluetooth devices searched through the received inquiry response signals, that is, search results (S804).

Subsequently, it is determined whether the Bluetooth device rescan is selected by the user (S806).

If the Bluetooth device rescanning is not selected, the Bluetooth device searching process may be terminated or the host Bluetooth device 200 may be connected to the specific Bluetooth device by the user selecting a specific Bluetooth device (S808).

On the other hand, when the Bluetooth device re-search is selected, the first value α at the time of re-search is set to a value larger by the third value (γ) than the first value α at the time of the previous search (S810). This is to search for the peripheral Bluetooth devices located in the vicinity of the host Bluetooth device 200 for a longer time than the previous search in order to search for the desired Bluetooth device because the last search did not find the desired Bluetooth device.

Subsequently, the host Bluetooth device 200 broadcasts an inquiry signal and receives inquiry response signals transmitted in response to the inquiry signal (S812).

Subsequently, the host Bluetooth device 200 displays information on Bluetooth devices searched through the received inquiry response signals, that is, search results (S814).

In short, the Bluetooth device discovery process of the present embodiment resets the initial threshold value or the first value α in the rescanning process when the desired Bluetooth device is not found in the last discovery process, thereby searching for the peripheral Bluetooth device for a longer time than the previous discovery process. Search. Of course, according to another embodiment of the present invention, the Bluetooth device search time in the next search process may be the same as the Bluetooth device search time in the previous search process.

9 is a block diagram illustrating a host Bluetooth device according to an exemplary embodiment of the present invention.

Referring to FIG. 9, the host Bluetooth device 200 includes a controller 900, a key input unit 902, a Bluetooth module 904, a storage unit 906, a display unit 908, and a transceiver unit 910. .

The key input unit 902 includes a plurality of key buttons implemented by a dome method or a touch method. When the user selects a specific key button, the key input unit 902 provides an input signal corresponding to the selected key button to the controller 900.

The Bluetooth module 904 generates an inquiry signal for searching for a peripheral Bluetooth device, and broadcasts the generated inquiry signal through the transceiver 910. In addition, the Bluetooth module 904 analyzes the inquiry response signals transmitted in response to the inquiry signal to identify the peripheral Bluetooth devices searched for, and the repetition search count (Cnt), the maximum repetition search count (Max Cnt), and the threshold during the search process. The value, the first value α, the second value β and the third value γ are adjusted.

The storage unit 906 stores various data and a Bluetooth device search list, and includes, for example, a non-volatile flash memory.

The display unit 908 displays the information about the found Bluetooth devices to the user.

The transceiver 910 is a connection path between the host Bluetooth device 200 and the peripheral Bluetooth device.

Preferred embodiments of the present invention described above are disclosed for purposes of illustration, and those skilled in the art having ordinary knowledge of the present invention will be able to make various modifications, changes, additions within the spirit and scope of the present invention, such modifications, changes and Additions should be considered to be within the scope of the following claims.

As described above, the Bluetooth device search method and the host Bluetooth device for performing the same according to the present invention, if it is determined that the Bluetooth device to be searched no longer exists even before a preset search time in the host Bluetooth device, the Bluetooth device search End the process. Therefore, there is an advantage that unnecessary search time can be shortened.

Claims (14)

A Bluetooth module that broadcasts an inquiry signal and searches for peripheral Bluetooth elements through an inquiry response signal output from the peripheral Bluetooth element in response to the inquiry signal; And Including a display unit for displaying the search results, The Bluetooth module terminates the Bluetooth device searching process when the number of repetitive searches (Cnt) of peripheral Bluetooth devices repeatedly searched until a new peripheral Bluetooth device is found is greater than a threshold value. The host Bluetooth device of claim 1, wherein the threshold is increased when the host Bluetooth device re-scans for neighboring Bluetooth devices. The host Bluetooth device of claim 1, wherein the repetition count is reset to zero when a new peripheral Bluetooth device is found while the Bluetooth module searches for the peripheral Bluetooth devices. The method of claim 1, wherein the host Bluetooth device, Host Bluetooth device further comprises a storage for storing the search results. The host Bluetooth device according to claim 1, wherein the host Bluetooth device is a mobile communication terminal. Setting a threshold; Broadcasting an inquiry signal; And Searching for peripheral Bluetooth devices through at least one inquiry response signal output in response to the inquiry signal; The method of searching for a Bluetooth device according to claim 10, wherein the process of searching for the peripheral Bluetooth device is terminated when the number of repetitive searches (Cnt) of the peripheral Bluetooth devices that are repeatedly searched until the new peripheral Bluetooth device is found is greater than the threshold value. The method of claim 6, wherein the Bluetooth device searching method comprises: And if the new peripheral Bluetooth device is found, increasing the threshold by a first value (α1). The method of claim 7, wherein the Bluetooth device searching method, And increasing the threshold by the first value α1 only when the new peripheral Bluetooth device is searched and the number of repetitive searches Cnt is greater than the current number of searches Max Cnt. Bluetooth device search method. The method of claim 6, wherein the threshold is maintained when the new peripheral Bluetooth device is searched but the repetitive search count Cnt is less than or equal to the current search count Max Cnt. The method of claim 6, wherein the Bluetooth device searching method comprises: Rescanning peripheral Bluetooth devices, When a new peripheral Bluetooth device is found in the rescanning process, a corresponding threshold increases by a second value α2, and the second value α2 is equal to or greater than the first value α1. . The method of claim 6, wherein the Bluetooth device searching method comprises: And resetting the repetition search count (Cnt) to zero when the new peripheral Bluetooth device is searched. The method of claim 6, wherein the Bluetooth device searching method comprises: And if the new peripheral Bluetooth device is found, adding the new peripheral Bluetooth device to the list of Bluetooth devices. The method of claim 6, wherein the Bluetooth device searching method comprises: Further comprising setting an initial threshold, The threshold value is a Bluetooth device search method, characterized in that the initial threshold value or a value larger than the initial threshold value. The method of claim 13, wherein the Bluetooth device searching method comprises: Rescanning peripheral Bluetooth devices, The initial threshold value at the time of the re-search is greater than the initial threshold value at the time of the search.

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