KR20080079416A - Method of distance detection using response time of the bluetooth and method of protecting loss using the same, potable device using the same - Google Patents

Abstract

A distance detection method in accordance with response time between Bluetooth devices, a loss prevention method based on the detection method, and a portable terminal using the prevention method are provided to calculate a distance between the Bluetooth devices by considering a probability rate of separation in accordance with the current response time and maximum response time between the devices, thereby finding a lost portable terminal in a short time. A display unit(120) displays a list of target clients, and displays an identifier of a lost target client and a probability of loss according to decided results of loss. An audio processor(130) generates an alarm according to the decided results. A key input unit(140) generates a key signal necessary for control and activation of a loss prevention function. A memory(150) stores the list of the target clients, and stores threshold data in accordance with response time of the target clients. A controller(160) decides whether a target client is lost, by comparing the second response time with the first response time.

Description

FIELD OF DISTANCE DETECTION USING RESPONSE TIME OF THE BLUETOOTH AND METHOD OF PROTECTING LOSS USING THE SAME, POTABLE DEVICE USING THE SAME}

1 is a hierarchical diagram showing a Bluetooth communication method according to an embodiment of the present invention;

2 is a diagram showing a L2CAP layer frame format type of the present invention;

3 is a diagram showing a L2CAP layer data packet format of the present invention;

4 is a system configuration diagram for detecting a separation distance according to a response time according to an embodiment of the present invention;

5A and 5B illustrate a data frame format for measuring response time of the present invention;

Figure 6 is a graph showing the separation and separation distance according to the response time of the present invention,

7 is a graph showing the likelihood of deviation according to the response time of the present invention;

8 is a view showing a portable terminal for managing a plurality of target clients of the present invention lost;

9 is a view schematically showing the configuration of a mobile terminal of the present invention;

10 is a view showing in more detail the configuration of a mobile terminal controller according to an embodiment of the present invention;

11 is a flowchart illustrating a loss prevention method of a mobile terminal according to an embodiment of the present invention;

12 is a flowchart illustrating a loss prevention setting method of a mobile terminal according to an embodiment of the present invention;

Figure 13 is a state diagram showing each mode and state transition for the mobile terminal loss prevention function of the present invention.

The present invention relates to a method for detecting a separation distance according to a response time between Bluetooth devices (hereinafter referred to as Bluetooth), a loss prevention method based on the same, and a portable terminal using the same. By calculating the separation distance between Bluetooth in consideration of the rate, the separation distance detection method according to the response time between Bluetooth, which prevents the loss of goods, especially the mobile terminal and can be found again quickly even if lost, and the loss prevention method based on the same And a portable terminal using the same.

The portable terminal has been developed with a variety of optional functions to meet the various needs of many users with the improvement of ease of portability, thanks to the rapid development of devices and the development of software. In particular, the Bluetooth function, which enables to carry out short-range wireless communication by mounting a Bluetooth module among the optional functions, has contributed a lot to extend the communication range of the mobile communication system to more detail. Thanks to these characteristics, portable terminals equipped with a Bluetooth chip are currently being widely used.

On the other hand, the size of the portable terminal described above is drastically reduced due to the development of devices and the intensity of technology. This miniaturization characteristic contributes to accelerating the spread of portable terminals. However, on the other hand, due to the above-mentioned miniaturization characteristic, the loss of the portable terminal is also increasing frequently.

Accordingly, while using the above-described Bluetooth function mounted in the portable terminal, various measures are required to prevent the loss of belongings, such as a bag, a wallet, or the like with a Bluetooth module managed by the portable terminal or the portable terminal.

Therefore, the present invention was devised to solve the above-mentioned problems of the prior art, and an object of the present invention is to calculate the likelihood of detachment of a Bluetooth module according to the error-free response time between Bluetooth, and based on the calculated likelihood of departure The present invention provides a separation distance detection method, a loss prevention method based on the same, and a portable terminal using the same, by detecting a separation distance according to a response time between Bluetooth and allowing an alarm according to a setting.

In accordance with an aspect of the present invention, there is provided a method for detecting a separation distance according to a response time between Bluetoothes, the method including: transmitting a first signal by a first Bluetooth module; At least one second Bluetooth module transmitting a second signal to the first Bluetooth module in response to the first signal; Detecting a first response time from the first signal transmission time to the second signal reception time; And calculating a separation distance between the first Bluetooth module and the second Bluetooth module by comparing a preset second response time with the first response time.

According to an embodiment of the present invention for achieving the above objects, a detection method for a distance and a proximity using an inter-Bluetooth response time includes: receiving a first Bluetooth module for transmitting a first signal and the first signal and corresponding thereto; In at least one second Bluetooth module for transmitting a second signal to the first Bluetooth module, the time point at which the second signal is received from the time point at which the first signal is transmitted between the first Bluetooth module and the second Bluetooth module. Extracting a first response time up to; Extracting a second response time of a signal currently transmitted / received between the second Bluetooth module and the first Bluetooth module; Comparing the second response time with the first response time to determine how far or near the second Bluetooth module is; And alarming according to the determination result.

According to an embodiment of the present invention, a loss prevention method using an inter-Bluetooth response time according to an embodiment of the present invention comprises: a first Bluetooth module transmitting a first signal and a second signal receiving the first signal and corresponding thereto; At least one second Bluetooth module for transmitting the first signal to the first Bluetooth module, wherein the second signal is received from a transmission time point of the first signal just before the communication between the first Bluetooth module and the second Bluetooth module is lost; Extracting a first response time up to a time point; Generating a reference deviation possibility rate obtained by converting the first response time in a predetermined ratio; Setting a predetermined deviation possibility rate according to a selection within a range of the reference deviation possibility rate; Extracting a second response time of a signal currently transmitted / received between the second Bluetooth module and the first Bluetooth module; Calculating a current departure possibility ratio by converting the second response time to the reference departure probability based on the first response time; Determining a loss possibility of the second Bluetooth module by comparing the current detachment rate with the designated detachment rate; And alarming according to the determination result.

According to an aspect of the present invention, there is provided a portable terminal having a loss prevention function based on an inter-Bluetooth response time, the portable terminal including a first Bluetooth module for transmitting a first signal; And at least one target client that receives the first signal and transmits a second signal corresponding thereto to the first Bluetooth module, wherein the portable terminal transmits the first signal. The first response time from the time point to the second signal reception time is compared with a preset second response time to determine a possibility of loss or loss of the target client, and to alarm.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, only the parts necessary for understanding the operation according to the embodiment of the present invention will be described, it should be noted that the description of other parts will be omitted so as not to distract from the gist of the present invention.

The terms or words used in the specification and claims described below should not be construed as being limited to the ordinary or dictionary meanings, and the inventors are appropriate to the concept of terms in order to explain their invention in the best way. It should be interpreted as meanings and concepts in accordance with the technical spirit of the present invention based on the principle that it can be defined. Therefore, the embodiments described in the specification and the drawings shown in the drawings are only one of the most preferred embodiments of the present invention, and do not represent all of the technical idea of the present invention, various modifications that can be replaced at the time of the present application It should be understood that there may be equivalents and variations.

For example, an example of applying the separation distance detection method according to the response time between Bluetoothes according to an embodiment of the present invention to a portable terminal has been described as an example, but the present invention is not limited thereto. That is, the separation distance detection method according to the response time between the Bluetooth according to an embodiment of the present invention, in two or more items having a Bluetooth module, based on one article to detect the distance from the other one article based on the alarm The characteristics of the article are not limited to the portable terminal.

In addition, the loss prevention method according to the response time between Bluetooth according to an embodiment of the present invention and the possibility of departure from the mobile terminal using the same change the start time and response time of the response time between the mobile terminal and the target client of the response time; The loss or the likelihood of loss of the target client within the range of the time immediately before the time point at which the response time occurs and when the response time does not occur. That is, the detachment rate is a ratio of the response time between the mobile terminal and the target client, which can be understood as a response time ratio, and when the separation distance corresponding to the response time is converted into a ratio, the separation distance Can be understood as a ratio.

In addition, the response time in the present invention means a response time for which no data error occurs.

In addition, in the present invention, the target client is described as being spaced apart based on the mobile terminal, but this is for the purpose of description and the present invention may be applied in the same manner as the portable terminal is spaced based on the target client. .

On the other hand, the portable terminal to which the separation distance detection method according to the response time between Bluetooth according to an embodiment of the present invention can be applied is a terminal equipped with a Bluetooth module, preferably a mobile phone, a DMB receiver, a wired / wireless phone, personal information Terminals (PDAs, Personal Digital Assistants), Smart Phones, DMB Terminals, Notebooks and Personal Computers, Global System For Mobile Communication (GSM) / General Packet Radio System (GPRS) Terminals, 3G For example, all information communication and multimedia devices such as International Mobile Telecommunication 2000 (IMT-2000) terminals and Universal Mobile Telecommunication Service (UMTS) terminals using wideband code division multiple access (WCDMA) technology, and applications thereof. It will be obvious that it can be applied.

Here, the Bluetooth communication method applied to the separation distance detection method according to the response time between Bluetooth according to an embodiment of the present invention will be described.

1 is a diagram conceptually illustrating a Bluetooth communication method applied to an embodiment of the present invention.

Referring to FIG. 1, the Bluetooth communication scheme applied to an embodiment of the present invention includes a radio layer 10, a baseband layer 20, a L2CAP (Logical Link Control And Adaptation Protocol) layer 30, and a profile layer 40. ) And the application layer 50.

In the Bluetooth communication method of the present invention having the configuration as described above, the wireless layer 10 receives a radio signal transmitted in the air and transmits it to the baseband layer 20, and transmits the signal transmitted from the baseband layer 20 to the air. It serves to deliver to the public.

The baseband layer 20 communicates directly with the application layer 50 or using the L2CAP layer 30 and the profile layer 40. In more detail, the baseband layer 20 may deliver an audio signal and a control signal directly to the application layer 50. In this case, a channel formed between the baseband layer 20 and the application layer 50 is a synchronous link oriented (SCO) link. The SCO link avoids latency, and there is no retransmission even if a packet is transmitted or damaged. The link connection is configured by reserving a specific slot between a master and a slave. And, the basic unit of connection of the SCO link is two slots, one in each direction, and the slave can transmit and receive up to three links, that is, 64 Kbps with the master.

The profile layer 40 is a layer for supporting the application layer 50 and delivers received data to the application layer 50 according to a profile defined for each application program. The profile layer 40 includes various profiles such as a generic access profile, a serial port profile, a universal object access profile, a headset set, a LAN access profile, and a file transfer profile for accessing various devices. It includes.

The L2CAP layer 30 is a layer that delivers data transmitted from the baseband layer 20 to the profile layer 40 and manages various profiles. This L2CAP layer 30 has a data packet format as shown in FIG. In detail, the L2CAP data packet format includes a 2 byte "Length", a 2 byte "Channel ID", and a 0 to 65535 byte "Data and Control" area. Here, the "Channel ID" is for a virtual channel. This L2CAP layer 30 is used for multiplexing, partitioning and reassembly, QoS and group management.

Meanwhile, a channel through which data is transmitted, that is, an Asynchronous Linkless (ACL) link, is formed between the L2CAP layer 30 and the profile layer 40. ACL links are used where data integrity is important and can use one frame, three or more slots, and up to 721kbps data transfer. The communication channel used in the separation distance detection method according to the response time between Bluetoothes according to an embodiment of the present invention is the above-described ACL link. The detection method according to an embodiment of the present invention basically uses an ACL link, but when maintaining the ACL link, the detection method may have information on setting the SCO link. Therefore, the SCO link may be supported only by the ACL link control.

3 is a diagram illustrating a structure of a frame used for an ACL link according to an embodiment of the present invention.

Referring to FIG. 3, the frame structure used for the ACL link of the present invention includes a 72-bit access code, a 54-bit header, and a data area to which a plurality of bits are allocated.

Herein, 18 bits are allocated to the header area for the purpose of error control. That is, a part of the header area is an address area of 3 bits, a type area allocated to 4 bits, and an area allocated by 1 bit to determine the characteristics of the header, and HEC (Header) to which 8 bits are allocated to check errors of the header. Error Check) area. In the method for detecting the separation distance according to the response time between Bluetooth according to an embodiment of the present invention, when transmitting and receiving data between Bluetooth modules spaced at least a certain distance, the above 18 bits are compared until the error-free response time is detected and the separation distance is compared. Is determined.

The data area is allocated 240 bits for one slot frame, 1490 bits for three slot frames, and 2740 bits for five slot frames.

In the above, the Bluetooth communication method according to an embodiment of the present invention has been described. Hereinafter, a method of measuring a response time of a signal transmitted and received between Bluetooth in order to detect a separation distance according to a response time between Bluetooth according to an embodiment of the present invention will be described.

4 is a diagram schematically illustrating a system configuration for measuring a signal response time according to an exemplary embodiment of the present invention.

Referring to FIG. 4, a system configuration for measuring a signal response time according to an embodiment of the present invention includes a portable terminal 100 in which the first Bluetooth module 110 is mounted and a second Bluetooth module 210 in which the first Bluetooth module 110 is mounted. It is configured to include a target client 200.

In the signal response time measurement system according to an exemplary embodiment of the present invention, the portable terminal 100 transmits a “Data” signal to the second Bluetooth module 210 of the target client 200 as a master. The target client 200 receives the "Data" signal, performs a process thereon, and then transmits an "ACK" signal to the mobile terminal 100. In this case, the signal response time of the present invention means a time from transmitting the "Data" signal to receiving the "Ack" signal. This will be described in more detail with reference to FIG. 5A. Referring to FIG. 5A, the portable terminal 100 and the target client 200 form an ACL link between each other, and transmit and receive signals using an L2CAP data format. In this case, the data frame format of the transmitted / received signal is a 12-byte region in which a 2-byte “Length”, a 2-byte “Channel ID”, and an address value “BD_ADDR” representing a Bluetooth device number are stored and 20 Bytes are allocated and have a "timestamp" field that stores up to the current time in microseconds. Among the data frame formats, in the response time measurement according to the embodiment of the present invention, an area to which the device number of the Bluetooth module is allocated and an area to which the current time in microseconds is stored are used. That is, the mobile terminal 100 may detect a signal response time with the designated target client 200 using the "Data" signal and the "Ack" signal, which are signals transmitted and received through the ACL link. On the other hand, the message format used to detect the separation distance between Bluetooth according to an embodiment of the present invention is not limited to the format shown in Figure 5a based on the L2CAP described above. That is, the message format applicable to the embodiment of the present invention may be a format having a header of 4 bytes, a BD_ADDR of 12 bytes, a timestamp of 18 bytes, and a 2-byte SR as shown in FIG. 5B. Here, the 4-byte header is an area defining an identifier that can distinguish the target client 200, and a data value defining the identifier of the target client 200 is input. In addition, in the 2-byte SR region, when the target client 200 has its own alarm unit and an alarm is generated according to the separation distance, an alarm indicator for informing the occurrence of an alarm to the target client 200 is input by the mobile terminal 100. Area. That is, the SR area is not set when the target client 200 is within a preset response time and separation distance, but is set when the target client 200 is out of the response time and separation distance so that the target client 200 is alarmed. Can be.

6 is a graph illustrating a relationship between the response time and the distance measured between the first Bluetooth module 110 and the second Bluetooth module 210 using the response time measurement method. Referring to FIG. 6, in relation to the response time and distance between Bluetooth, the response time is the same until 6.7m and there is no error, but after 6.7m, the response time increases linearly. That is, the figure shows a state in which the target client 200 enters an area where there is a risk of leaving the portable terminal 100 after 6.7m. In addition, after 10.2m without a graph, the response time is not shown as the communication between Bluetooth is lost. 6 is a diagram illustrating a Bluetooth module using a product having a transmission / reception distance of about 10 m, and the inflection point of the graph may change according to the performance of the Bluetooth module. That is, in the method for detecting the separation distance according to the response time between Bluetooth according to an embodiment of the present invention, the location of the target client 200 and the mobile terminal 100 located within 6.7 m to 10.2 m using the response time as shown in the drawing. ) And the separation distance between the target client 200.

On the other hand, based on the diagram shown in FIG. 6 showing a response time measuring method according to an embodiment of the present invention by calculating the possible escape rate according to the response time ratio of the target client, by estimating the likelihood of departure of the target client Can support the loss prevention method.

The detachment rate is a value obtained by dividing a current response time by a maximum response time, wherein the current response time is a response time measurement of a signal transmitted and received between a current mobile terminal and a target client, and the maximum response time is a start time of communication. It is measured and applied at the test stage. In more detail, the likelihood of departure may be divided into a reference departure possibility rate, a designated departure possibility rate, and a current departure possibility rate. The reference deviation possibility rate is a signal transmitted / received between the mobile terminal 100 and the target client 200 from a time point at which the response time of the signal transmitted / received between the mobile terminal 100 and the target client 200 changes, for example, a data signal. Means that the response time distributed up to the maximum response time of the signals transmitted and received immediately before the communication interruption or the separation distance between the mobile terminal 100 and the target client 200 corresponding thereto is converted at a predetermined ratio in the process of transmitting and receiving the Ack signal. do. The designated deviation possibility rate means a departure possibility rate that is selectively designated by a user within the range of the reference deviation possibility rate. The current detachment rate means that the response time of a signal transmitted or received between the current mobile terminal 100 and the target client 200 or a separation distance corresponding thereto is converted into a ratio in comparison with the reference departure possibility rate. .

Here, assuming that the reference departure possibility rate or the current departure possibility rate y, the separation distance between Bluetooth x, a and b as a constant, the possible escape rate can be expressed as Equation 1.

y = a (x-b)

In FIG. 6, a is set to 0.18 and b to 5.17. The a and b values may be changed according to the maximum communication distance of the Bluetooth module.

Meanwhile, as shown in FIG. 7, the designated deviation possibility rate may be set differently using characteristics of response time change according to communication distance of the Bluetooth module. Hereinafter, an example of differently setting the designated deviation possibility according to the separation distance between the mobile terminal 100 and the target client 200 will be described.

Referring to FIG. 7, when it is determined that 10.2m is a distance from the portable terminal 100 to the target client 200, the portable terminal 100 and the target client 200 have a current separation distance. If you set the alarm to occur when the interval is about 7.0m, it is set to have a specified deviation rate of 40%, and if it is set to alarm when the separation distance is 8.0m, the specified deviation is set to 60% . In the same manner, when the portable terminal 100 and the target client 200 designate an alarm when the separation distance has an interval of 9.5 m, the designated deviation possibility rate is set to 80%. On the other hand, the portable terminal 100 according to an embodiment of the present invention can be set to each of the specified deviation rate can be set as a ratio because the separation distance can be changed according to the characteristics of the Bluetooth module, according to the user selection It can also be set by the separation distance. The portable terminal according to the embodiment of the present invention using the above-described ratio ratio by distance is whether the current detachment rate of the target client 200 is located within a stable zone within 6.7m without a risk of departure, and within 10.2m after 6.7m. It is possible to determine whether it is located in the unstable zone up to and the departure zone after 10.2m.

In addition, since the mobile terminal according to the embodiment of the present invention can determine how far the target client is located from the stability zone, it is possible to leave a different designation according to each target client importance or size or characteristic as shown in FIG. 8. The rate can be set. In more detail, as illustrated in FIG. 8, the mobile terminal 100 of the present invention includes a first target client 200a, a second target client 200b, a third target client 200c, and a fourth target. When the client 200d has different characteristics, various target clients may be easily managed by differently designating an alarm occurrence according to a specified deviation possibility of each target client. That is, when the size of the first target client 200a that is large or easy to find is applied to the designated departure possibility rate 100%, the current departure possibility rate of the first target client 200a exceeds the designated departure possibility rate. That is, when the deviation is more than 10.2m, it is set to alarm, and can be managed by differently setting the designated escape rate to different target clients in the same way. To this end, the portable terminal according to an exemplary embodiment of the present invention has a Bluetooth module 110, a display unit 120, an audio processor 130, a key input unit 140, a memory 150, and a controller 160 as shown in FIG. It is configured to include).

The Bluetooth module 110 forms a communication channel, for example, an ACL link channel, with the target client, and transmits a data signal and an Ack signal. In addition, the Bluetooth module 110 may form a piconet with a plurality of target clients located nearby, and in this case, the Bluetooth module 110 communicates with a Bluetooth module disposed in the plurality of target clients.

The display unit 120 displays information input by a user or information provided to the user, including various menus of the mobile terminal 100. In particular, the display unit 120 provides a menu screen interface for utilizing the Bluetooth module 110, displays a list of at least one target client acquired by scanning the surroundings of the Bluetooth module 110, and displays the displayed target client. Provides a screen interface for setting the specified deviation possibility of. The display unit 120 may be formed of a liquid crystal display (hereinafter, referred to as an LCD). When the LCD is formed in the form of a touch screen, the display unit 120 may be It may be included in the input means. In addition, the display unit 120 may alert the user when the current detachable rate of the target client deviates from the designated detachable rate according to the designated detachable rate set in each of the target clients. That is, the display unit 120 may alert the user by displaying a target client whose current detachable rate exceeds a specified detachable rate using a blinking display area. In addition, the display unit 120 may display a separation distance corresponding to the designated deviation rate indication. For example, the display unit 120 may display a separation distance corresponding thereto when the designated deviation rate is 60%.

The audio processor 130 reproduces an audio signal received from the outside through a speaker SPK or collects an audio signal using a microphone MIC, and transmits the collected audio data to the controller 160.

In particular, the audio processor 130 of the present invention may alert the user as an audio signal when the current detachment rate exceeds the predetermined detachment rate of the target client. Here, the audio signal may include various preset alarm bells, music sounds, guide broadcasts, and the like, and in the case of guide broadcasts, may include a name of a corresponding target client. For example, the announcement may include the name of a specific target client, such as "there is a risk of losing the wallet".

The key input unit 140 includes a plurality of input keys and function keys for receiving numeric or character information and setting various functions. The function keys may include direction keys, side keys, shortcut keys, and the like, which are set to perform a specific function. In addition, the key input unit 140 transmits a key signal input in relation to user setting and function control of the portable terminal 100 to the controller 160.

In particular, the key input unit 140 in the menu provided to utilize the Bluetooth module 110 according to the present invention, the key signal for the Bluetooth module 110 application program designation, peripheral using the Bluetooth module 110 A key signal for scanning, a key signal for designating a scanned target client, a key signal for setting a designated deviation possibility of the designated target client, and the like are generated and transmitted to the controller 160.

The memory 150 stores application programs necessary for operating a function according to an exemplary embodiment of the present invention, and downloads multimedia content to be downloaded, user data generated by a user, and the like. The memory 150 may largely include a program area and a data area.

The program area may include an operating system (OS) for booting the mobile terminal 100, an application program for utilizing the Bluetooth module 110, a response time between the mobile terminal 100 and the target client, and / or a separation distance therefrom. And a calculation program for determining a deviation possibility based on this, and other option functions of the mobile terminal 100, for example, a camera function, a sound playback function, an application program required for an image or video playback function, and the like. The computational program compares the reference departure possibility rate converted into a maximum ratio of the maximum response time between the mobile terminal 100 and the target client and the current response time between the mobile terminal and the target client by comparing the current response time with the maximum response time. Calculate When the mobile terminal 100 activates each of the above functions in response to a user request, the mobile terminal 100 provides the respective functions by using corresponding application programs under the control of the controller 160. Here, the application program for utilizing the Bluetooth module 110 may include a program for detecting a response time between the mobile terminal 100 and the target client. That is, the detection program detects the data signal and the Ack signal transmitted and received between the portable terminal and the target client, extracts the Bluetooth device number and time stamp, and transfers the extracted information to the controller 160.

The data area is an area in which data generated according to the use of the mobile terminal 100 is stored. User data related to the multimedia content downloaded through a mobile communication system and a content server and the various optional functions, for example, the camera described above. A captured image or video by the function, phone book data, audio data, information corresponding to the corresponding content or user data, and the like can be stored. In particular, the data area of the present invention stores a list of target clients obtained by scanning the surroundings using the Bluetooth module 110, a reference deviation possibility rate, and a designated deviation possibility assigned to each target client, and the user selection. The stored information is transmitted to the controller 160 according to the present invention.

The controller 160 controls the overall operation of the portable terminal 100 and a signal flow between internal blocks of the portable terminal 100. The controller 160 may include functions of the modem and codec.

In particular, the controller 160 activates an application program for utilizing the Bluetooth module 110 in response to a key signal input for utilizing the Bluetooth module 110 and presets target clients scanned by the Bluetooth module 110. Control to alarm according to the specified deviation rate. To this end, the controller 130 includes a response time measuring unit 162, a deviation rate calculating unit 164, and an alarm control unit 166 as shown in FIG. 10.

The response time measuring unit 162 receives information such as a Bluetooth device number BD_ADDR and a timestamp from a signal transmitted and received by the Bluetooth module 110 and measures a current response time and a maximum response time. That is, the response time measurement unit 162 measures the current response time corresponding to the current measurement value and transmits it to the departure rate calculator 164, and communication start is initiated where communication between the mobile terminal 100 and the target client is not performed. The maximum response time corresponding to the time is detected and transmitted to the escape rate calculator 164. Here, the maximum response time is set by measuring the time just before the departure by experimenting with the Bluetooth module 110 of the mobile terminal 100 and storing the measured time immediately before the departure in the mobile terminal 100. Can be. The response time measuring unit 162 calculates the current response time according to the period in which the Bluetooth module 110 scans the neighboring target clients. That is, when the Bluetooth module 110 scans at a predetermined period, the current response time may be calculated according to the scanning period of the Bluetooth module 110. Meanwhile, the response time measuring unit 162 may detect the current response time by using the Bluetooth device number BD_ADDR and a timestamp obtained from the Bluetooth module 110 at a time designated by the user.

The escape rate calculator 164 receives a current response time and a maximum response time from the response time measurer, and calculates a reference escape rate and a current escape rate. In addition, the escape rate calculator 164 compares the specified escape rate that is set in each target client with the currently calculated escape rate, and transmits the result to the alarm controller 166 according to a comparative advantage. That is, the escape rate calculator 164 compares the set designated escape rate and the current escape rate with each other, detects a target client having a reference escape rate smaller than the current escape rate, and detects an identifier of the detected target client. For example, the name is transmitted to the alarm control unit 166.

The alarm controller 166 alerts the user that the corresponding target client is out of a predetermined designated deviation possibility rate according to the target client identifier transmitted by the escape rate calculator 164. In this case, the alarm controller 166 displays the identifier of the target client whose current escape rate is out of the designated escape rate using the display unit 120, and executes an alarm alarm and a broadcast using the audio processor 130. can do.

On the other hand, in the configuration for detecting the separation distance according to the response time between the Bluetooth of the present invention, the portable terminal 100 may perform an alarm to the user of the portable terminal device 100 according to the separation of the target client 200, When the target client 200 deviates from the preset response time with the portable terminal 100, it may generate its own alarm. That is, the target client 200 may include a separate alarm unit, and activate the alarm unit when the target time is out of the response time set by the portable terminal 100. To this end, the portable terminal 100 may add and transmit an alarm indicator to indicate an alarm to a predetermined portion of the message format transmitted to the target client 200.

When the target client 200 generates an alarm, the mobile terminal 100

Meanwhile, although FIG. 9 illustrates a block configuration required for describing an operation according to an exemplary embodiment of the present disclosure, for convenience of description, the present invention is not limited thereto. Therefore, the mobile terminal 100 of the present invention may further include a radio frequency unit, a camera unit and / or a digital broadcasting module, a multimedia module, etc. for providing a mobile communication function according to the provision form thereof. In addition, although the display unit 120 and the control unit of the mobile terminal 100 are described as displaying the separation distance according to the setting of the predetermined deviation possibility, the display of the specified separation possibility according to the separation distance setting is possible, Only one of the designated deviations may be displayed.

In the above, each configuration for detecting the separation distance according to the response time between Bluetooth and the configuration of the portable terminal according to an embodiment of the present invention has been described. Hereinafter, a loss prevention method using a separation distance detection method according to a response time between Bluetoothes according to an embodiment of the present invention will be described.

Prior to description, in the loss prevention method according to an embodiment of the present invention, it is assumed that a designated departure possibility rate of the target clients for loss prevention is preset.

In addition, the specified deviation possibility rate described in the present invention may be a preset ratio and may be a criterion indicating a response time and a separation distance between the target client and the mobile terminal 100. That is, the detachment rate may be an index indicating a predetermined distance between the target client and the mobile terminal 100 as well as a ratio corresponding to the maximum response time immediately before the target client and the mobile terminal 100 lose communication. Can be. In more detail, the departure possibility rate described below is a reference departure possibility rate, which is determined by a predetermined ratio from the time point at which the response start time starts and changes between the mobile terminal 100 and the target client to the maximum response time, and the maximum A current departure possibility rate indicating a current response time to a response time, and a designated departure possibility rate designated by a user selection among the reference departure possibility rates.

11 is a loss prevention method using the separation distance detection method according to the response time between Bluetooth according to an embodiment of the present invention, the control unit 160 in the standby mode of the mobile terminal 100 (S101), the key signal input In operation S102, the method determines whether the input key signal is a key signal input for selecting a loss prevention menu (S103).

Next, in step S103, the control unit 160 controls to perform a corresponding function, if the loss prevention menu selection is not (S104).

In step S104, the anti-lost menu is a menu for preventing the loss of the target client based on the separation distance detection method according to the Bluetooth response time according to the present invention. The anti-lost menu can be selected.

In addition, in step S104, the corresponding function may include various functions such as a call function, an option function, an audio play function, a video play function, a camera function, and a game function.

On the other hand, in step S103, when the key signal is a key signal for selecting the loss prevention menu, the controller 160 controls to scan the surroundings and create and display a target client list for searching for target clients located in the vicinity. (S105).

In step S105, the control unit 160 may control to search the target client by scanning the periphery when the anti-lost menu is selected, or may control to scan the periphery according to a predetermined period. In addition, the controller 160 may control to search the target client by scanning the surroundings at a time designated by the user.

In addition, in step S105, the controller 160 displays the created target client list on the display unit 120 so that the user can check the type and number of target clients currently located in the vicinity, and the respective target clients displayed. It supports to set the deviation rate of the specification separately. In this case, the controller 160 may collectively set the designated escape rate of the plurality of target clients as one data, or may set them individually as described above. In addition, the control unit 160 may control to display the separation distance between the mobile terminal 100 and the target client according to the designation of the predetermined deviation possibility rate. To this end, the controller stores data on the separation distance corresponding to the maximum response time between the mobile terminal 100 and the target client, and compares the stored separation distance with the predetermined departure possibility rate according to the designated departure possibility rate. The separation distance can be displayed.

Next, the controller 160 detects the current escape rate of each target client (S106), compares the detected current escape rate and the preset designated escape rate (S107), and sets the preset escape rate. If the current is less than the possible escape rate is controlled to alarm (S108).

In step S106, the controller 160 examines a time stamp area of a data signal transmitted to a target client and an Ack signal received from the target client, and a Bluetooth device number area capable of identifying each target client. Compute the current response time of the client. The controller 160 calculates a current deviation rate using a preset maximum response time and the current response time. Here, the maximum response time is a response time immediately before communication between the portable terminal 100 and the target client, and can be statistically set through an experiment in the product test step.

In step S107, the controller 160 compares the current escape rate calculated in step S106 with the designated escape rate preset for each target client or all target clients. Herein, it is assumed that there is a risk that the target client is separated from the portable terminal 100 when the current escape rate is greater than the preset designated escape rate.

In step S108, when the target client is separated from the mobile terminal 100 and a target client having a current detachment rate is greater than a predetermined designated release rate, the controller 160 alarms the error using the audio processor 130. By displaying the identifier of the target client, for example, the name, on the display unit 120, it is possible to check whether the target client is at risk of being lost or lost.

On the other hand, in step S107, if the current departure possible rate is less than the predetermined predetermined departure possible rate branches to step S106.

12 is a flowchart illustrating a loss prevention setting method according to an embodiment of the present invention.

Referring to FIG. 12, in the loss prevention setting method according to an exemplary embodiment of the present invention, first, the controller 160 checks whether a key signal is input in a standby mode (S201), and inputs a key signal when the key signal is input (S202). It is checked whether the key signal is a key signal for a Bluetooth application (S203).

In step S203, if the key signal is not a key signal for a Bluetooth application, the controller 160 controls to perform a corresponding function (S204).

In operation S204, the basic function of the portable terminal 100 may include various functions such as a call function, an optional function, an audio play function, a video play function, a camera function, and a game function.

In step S103, when the key signal is a key signal for a Bluetooth application, the controller 160 reads the Bluetooth application from the memory 150 (S205).

Next, the controller 160 checks whether a key signal is input for selecting an anti-lost setting menu (S206), and displays a list of scanned and scanned target clients when the anti-lost setting menu is selected (S207). In the step S206, if the key signal input is not the loss prevention setting menu selection, the process branches to the step S204 to perform the corresponding function.

Next, the controller 160 sets each designated departure possibility rate in response to a key signal for inputting each target client designated departure possibility rate (S208).

In step S208, the control unit 160 may set different target departure possible rates for each target client, and may set all target clients to the same designated departure possibility rate. That is, the controller 160 may set and integrate all the target clients scanned in the step S207 into one designated departure possibility rate when setting the target client designated departure possibility rate.

Thereafter, the controller 160 terminates the loss prevention setting according to whether the setting is completed (S209). If the setting is not completed in step S209, the process branches to step S208 to perform setting of a predetermined deviation possibility.

13 is a state diagram illustrating an operation state of a portable terminal according to an exemplary embodiment of the present invention.

Prior to the description, the operation state of the portable terminal of the present invention is only an operation state for preventing the loss in order to facilitate the description of the invention, and the operation of the other portable terminal is omitted. In addition, hereinafter, the setting of the departure criterion between the mobile terminal 100 and the target client as an exit rate is described as an example. However, not only the departure rate but also the signal transmitted / received between the mobile terminal 100 and the target client may be used. The response time, the resulting separation distance, and the like may be applied in the same manner as the detachment rate.

Referring to FIG. 13, an operating state of the portable terminal of the present invention includes a standby state mode (S301), an anti-lost mode (S302), an anti-lost setting mode (S303), and an alarm mode (S304).

The standby mode S301 is a standby mode of the portable terminal, and is a mode for providing an initial screen state after power is supplied.

The loss prevention mode (S302) is a mode that is activated according to a menu selection in the standby mode (S301), and is set according to a response time and / or a separation distance between Bluetooth modules to prevent the loss of neighboring target clients. This mode is to set alarm according to the possible escape rate. That is, after activation, the anti-lost mode S302 scans the neighboring target clients and moves to the alarm mode S304 when the current escape rate of the specific target client is greater than the preset designated escape rate.

The loss prevention setting mode (S303) is a mode activated according to a menu selection in the standby mode (S301) or the loss prevention mode (S302). Mode to set. That is, the loss prevention setting mode S303 is a mode in which a threshold is set to generate an alarm when a specific target client deviates from a set designated deviation possibility rate. When the loss prevention setting mode (S303) branches in the standby state mode (S301), when the setting is completed, branches to the standby state mode (S301) again, when branching in the loss prevention mode (S302), when the setting is completed It may be controlled to branch back to the loss prevention mode (S302). In addition, even if the loss prevention setting mode (S303) branches in the standby state mode (S301), it may move to the loss prevention mode (S302) upon completion of the setting.

The alarm mode S304 is a mode specified when a specific target client is out of a preset designated escape rate in a state where the loss prevention mode S302 is activated, that is, a risk of loss or loss. The alarm mode S304 may be moved according to a case in which the current escape rate is greater than a specified escape rate in the loss prevention mode S302, and may move back to the loss prevention mode S302 through a confirmation process. The alarm mode (S304) may control to generate a warning broadcast or a warning sound by using the audio processor 130 when the risk of loss and loss occurs, and an example of an identifier of a target client that has a risk of loss or loss on the display unit 120. For example, the name can be displayed. In addition, in the alarm mode S304, a specific video signal, for example, a lamp blinking, may be used for the display unit 120 to alarm the possibility of the loss and the loss of the target client.

As described above, the separation distance detection method according to the response time between Bluetooth according to an embodiment of the present invention, the loss prevention method based on the same and the mobile terminal using the same can estimate the escape rate according to the separation distance between Bluetooth. Based on this, it is possible to determine the possibility of departure and the occurrence of the departure of a specific target client.

As described above, in the detailed description of the present invention has been described with respect to specific embodiments, various modifications are possible without departing from the scope of the invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined not only by the claims below, but also by the equivalents of the claims.

As described above, according to the method for detecting the separation distance according to the response time between Bluetooth, the loss prevention method based on the same, and the portable terminal using the same, the detection of the separation distance according to the response time between the Bluetooth and the specific target based on the same It is possible to determine the possibility of loss and loss of the client.

In addition, according to the portable terminal using the separation distance detection method according to the response time between the Bluetooth proposed in the present invention and the lost prevention method based on the same, the first response time, the second response time, the third response time, etc. By comparing the two with each other, it is possible to detect the closer or farther distance.

Claims (25)

Transmitting, by the first Bluetooth module, the first signal; At least one second Bluetooth module transmitting a second signal to the first Bluetooth module in response to the first signal; Detecting a first response time from the first signal transmission time to the second signal reception time; And Calculating a separation distance between the first Bluetooth module and the second Bluetooth module by comparing a preset second response time with the first response time. Way. The method of claim 1, The second response time is Method of detecting the separation distance according to the response time between the Bluetooth, characterized in that the response time in the state immediately before the communication disconnection between the first Bluetooth module and the second Bluetooth module. The method of claim 2, The separation distance calculation process Calculating a separation distance between the first Bluetooth module and the second Bluetooth module corresponding to the second response time; And Calculating a separation distance corresponding to the first response time in consideration of the ratio of the first response time to the second response time. The method of claim 3, The separation distance is A first distance having a first response time of equal magnitude; A second distance with an incrementally increasing first response time; And And a third distance from which communication is lost due to no signal transmission / reception. The method of claim 4, wherein The second distance is Separation distance detection method according to the response time between Bluetooth, characterized in that the linear increase and decrease. The method of claim 1, At least one of the first response time and the second response time may be detected. Extracting a time stamp of the first signal; Extracting a time stamp of the second signal; And And comparing the time stamp of the first signal with the time stamp of the second signal to detect the first response time which is a response time between the first Bluetooth module and the second Bluetooth module. Separation distance detection method according to response time between Bluetooth. The method of claim 1, The first Bluetooth module and the second Bluetooth module The separation distance detection method according to the response time between Bluetooth, characterized in that for transmitting and receiving the first signal and the second signal via an ACL link. A first Bluetooth module for transmitting a first signal and at least one second Bluetooth module for receiving the first signal and transmitting a second signal corresponding thereto to the first Bluetooth module, Extracting a first response time from a transmission time of the first signal until a communication time between the first Bluetooth module and the second Bluetooth module to a reception time of the second signal; Extracting a second response time of a signal currently transmitted / received between the second Bluetooth module and the first Bluetooth module; Determining a possibility of loss of the second Bluetooth module by comparing the second response time with the first response time; And Alarming according to the determination result; Loss prevention method using a response time between Bluetooth. The method of claim 8, The second response time is Loss prevention method using the Bluetooth response time, characterized in that the proportional increase and decrease within a predetermined distance between the first Bluetooth module and the second Bluetooth module. The method of claim 9, The second response time is Loss prevention method using a response time between Bluetooths having the same value within a predetermined distance between the first Bluetooth module and the second Bluetooth module. The method of claim 8, Generating a reference deviation possibility rate by converting the first response time at a predetermined ratio; And And converting the second response time to the reference departure rate based on the maximum response time. 2. The method of claim 11, The loss determination process is Determining that the second Bluetooth module is located within the stability zone from the risk of loss from the first Bluetooth module when the current detachment rate is less than the reference detachment rate; And Determining that the second Bluetooth module has a risk of loss or is lost from the first Bluetooth module when the current detachment rate is greater than the reference detachment rate. How to prevent loss using time. The method of claim 12, The alarm process is Alarming with an audio signal when the second Bluetooth module determines that the second Bluetooth module has the risk of loss or is lost; and Loss prevention method using a response time between Bluetooth, characterized in that it comprises at least one of the alarm process through a video signal. The method of claim 13, Alarming with the video signal is Loss prevention method using a response time between Bluetooth, characterized in that it comprises the step of displaying the device identifier of the second Bluetooth module. The method of claim 8, The first response time or the second response time detection process Extracting a time stamp of the first signal; Extracting a time stamp of the second signal; And Comparing the time stamp of the first signal with the time stamp of the second signal to detect the first response time or the second response time between the first Bluetooth module and the second Bluetooth module. Loss prevention method using response time between Bluetooth. A first Bluetooth module for transmitting a first signal and at least one second Bluetooth module for receiving the first signal and transmitting a second signal corresponding thereto to the first Bluetooth module, Extracting a first response time from a transmission point of the first signal just before the communication is lost between the first Bluetooth module and the second Bluetooth module to a reception point of the second signal; Generating a reference deviation possibility rate obtained by converting the first response time in a predetermined ratio; Setting a predetermined deviation possibility rate according to a selection within a range of the reference deviation possibility rate; Extracting a second response time of a signal currently transmitted / received between the second Bluetooth module and the first Bluetooth module; Calculating a current departure possibility ratio by converting the second response time to the reference departure probability based on the first response time; Determining a loss possibility of the second Bluetooth module by comparing the current detachment rate with the designated detachment rate; And Alarming according to the determination result; Loss prevention method using a response time between Bluetooth. The method of claim 16, The loss determination process is Determining that the second Bluetooth module is located within the stability zone from the risk of loss from the first Bluetooth module when the current detachment rate is less than the designated detachable rate; And Determining that the second Bluetooth module has a loss risk or is lost from the first Bluetooth module when the current detachment rate is greater than the designated detachment rate. Loss prevention method that we used. The method of claim 17, The alarm process is Alarming with an audio signal when the second Bluetooth module determines that the second Bluetooth module has the risk of loss or is lost from the first Bluetooth module; and Loss prevention method using a response time between Bluetooth, characterized in that it comprises at least one of the alarm process through a video signal. The method of claim 18, Loss prevention method using the Bluetooth response time, characterized in that further comprising the step of displaying the device identifier of the second Bluetooth module. The method of claim 16, The designated deviation possibility rate is Loss prevention method using an inter-Bluetooth response time, characterized in that it is specified within a range from the time when the response time is changed between the first Bluetooth module and the second Bluetooth module to the first response time. A mobile terminal including a first bluetooth module for transmitting a first signal; And At least one target client including a second Bluetooth module for receiving the first signal and transmitting a second signal corresponding thereto to the first Bluetooth module; The mobile terminal Comparing the first response time from the time of transmitting the first signal to the time of receiving the second signal with a preset second response time to determine a possibility of loss or loss of the target client and to alarm the Bluetooth; A mobile terminal having an anti-lost function based on a response time. The method of claim 21, The mobile terminal A display unit configured to display the list of the target clients, and display a loss possibility and an identifier of the lost target client according to the determination result; An audio processor for generating an alarm according to the determination result; A key input unit for generating a key signal for activating and controlling the loss prevention function; A memory for storing the list of target clients and storing threshold data according to a response time of the target clients; And And a controller which compares the second response time with the first response time to determine a possibility of loss of the target client. The method of claim 22, The control unit The time range from the point of time until just before the communication interruption in which no signal response occurs between the first Bluetooth module and the second Bluetooth module to the first response time is converted into a reference deviation rate, and the first response time and the After converting the current departure possibility rate of the target client in preparation for a second response time, comparing the reference departure possibility rate with the current departure possibility rate and determining whether the target client is lost or lost A mobile terminal having an anti-lost function based on a response time. The method of claim 23, wherein The control unit Bluetooth response according to claim 1, wherein a designated departure possibility rate is set according to a selection among the reference departure possibility rates, and the loss possibility or loss of the target client is determined by comparing the specified departure possibility rate with the current departure possibility rate. A mobile terminal having a time-based loss prevention function. The method of claim 24, The designated deviation possibility rate is A portable terminal having a loss prevention function based on an inter-Bluetooth response time, which is specified within a range from a time point at which a response time is changed between the first Bluetooth module and the second Bluetooth module to the first response time.

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