KR20060017117A - Apparatus and method for watching request call of mobile terminal - Google Patents

Abstract

The present invention relates to a mobile terminal monitoring apparatus and method for detecting the location of the mobile terminal and preventing illegal use of the mobile terminal by detecting the electric field strength of the radio wave generated in the call mode of the mobile terminal in a specific place where the use of the mobile terminal is limited. . Detects the electric field strength of the mobile terminal generated in the restricted use. The detected electric field strength is analyzed to distinguish between standby mode and call mode. The monitoring apparatus and method of the mobile terminal detect and display the position of the mobile terminal through which radio waves are output in the call mode. By monitoring the use of the mobile terminal in a place where the use of the mobile terminal is restricted, there is an advantage of preventing the use of the unauthorized mobile terminal.

Mobile phones, mobile terminals, field strength, surveillance

Description

Apparatus and method for watching request call of mobile terminal}

1 is an exemplary view showing a configuration for monitoring the radio wave transmission of the mobile terminal using the call request monitoring device of the mobile terminal of the present invention.

2 is a block diagram showing the configuration of a call request monitoring apparatus of a mobile terminal according to the present invention;

3 is a flowchart illustrating the operation of a call request monitoring apparatus of a mobile terminal according to the present invention;

(Explanation of symbols for the main parts of the drawing)

10 classroom 20 mobile terminal

30: base station 100: monitoring device

110: electric field strength detection unit 120: use mode determination unit

130: distance measuring unit 140: display unit

The present invention is an apparatus and method for monitoring a call request of a mobile terminal, and more particularly, detecting and moving a position of a mobile terminal by detecting an electric field strength of a radio wave generated during a call mode of the mobile terminal in a specific place where the use of the mobile terminal is limited. The present invention relates to a call request monitoring apparatus and method for a mobile terminal for preventing illegal use of the terminal.

Recently, due to the development of mobile communication technology, mobile terminals are rapidly spreading, and about 30 million people in Korea are provided with mobile communication services by subscribing to mobile communication services.

In addition, as the population receiving mobile communication services increases, the spread of mobile terminals for receiving the mobile communication services is rapidly increasing. The increase in the spread of mobile terminals has made a lot of popularization not only for the general public but also for adolescents.

The dissemination of the mobile terminal has advantages such as providing a parent with a service for providing parents with a dangerous situation or an emergency situation of the teenager who owns the mobile terminal in addition to the general call service.

However, in addition to the advantages described above, the mobile terminal spread to young people has the following problems. There are problems such as receiving a call service during class time or cheating using a mobile terminal during a test time.

In addition, in order to prevent cheating using the mobile terminal at the test time, the test supervisor may restrict the carrying of the mobile terminal or turn off the mobile terminal at the test time.

However, there is a problem that it is not possible to prevent the use of the mobile terminal secretly brought to the test site.

Accordingly, an aspect of the present invention is to propose an apparatus and method for detecting a mobile terminal provided with a call service in a place where the use of the mobile terminal is limited.

In order to solve the above problems, an object of the present invention is to provide an apparatus and method for monitoring a call request of a mobile terminal for detecting a mobile terminal requesting a call service which is not permitted in a place where the call service of the mobile terminal is restricted.

In order to achieve the above object, the present invention provides an electric field strength detection unit for detecting the electric field strength of the radio wave for the call attempt when the mobile terminal located in the origination restriction area generates radio waves to attempt the call; A usage mode determination unit which detects a time duration of the electric field strength of the call attempt radio wave and determines whether it is a signal in a standby mode or a communication mode; A distance measuring unit calculating a distance to the mobile terminal according to the magnitude of the electric field strength of the radio wave detected by the electric field strength detecting unit; And a display unit which outputs a distance to the mobile terminal calculated by the distance measuring unit as call limit information of a mobile terminal attempting to make a call in the origination restriction area.

In addition, the transmission restriction area is characterized in that any one of the test site and the performance hall.

The display unit may be at least one of an LED and an LCD.

In addition, the LED is characterized in that on / off in proportion to the distance to the mobile terminal.

In another aspect, the present invention provides a method of detecting an electric field strength of a mobile communication terminal, the method comprising: i) detecting a field strength of a radio wave for attempting a call when a mobile terminal located in an origination restriction area generates a radio wave to attempt a call; ii) determining a usage mode of the mobile terminal according to the electric field strength duration of the radio wave output from the mobile terminal; iii) calculating the distance from the position where the electric field strength of the electric wave is detected to the mobile terminal according to the magnitude of the electric field strength of the electric wave when the usage mode of the mobile terminal is the call mode; And iv) displaying the calculated distance to the mobile terminal.

In addition, step ii) is characterized in that the electric field strength of the radio wave is re-detected when the use mode of the mobile terminal is the standby mode.

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

1 is an exemplary view showing a configuration for monitoring the radio wave transmission of the mobile terminal using the call request monitoring apparatus of the mobile terminal of the present invention.

In FIG. 1, the monitoring apparatus 100 moves when a predetermined radio wave is output from the mobile terminal 20 to the base station 30 in order to request a mobile communication service from the mobile terminal 20 in the classroom 10 to which the call is restricted. The electric field strength of the electric wave output from the terminal 20 is detected, and the distance between the mobile terminal 20 and the monitoring device 100 according to the electric field strength is calculated to monitor the position of the mobile terminal 20. ).

The area limiting the call is a place where the call service of the mobile terminal 20 is normally provided, but restricts the origination of the mobile terminal 20 according to a special purpose or state, for example, a test or education.

2 is a block diagram showing the configuration of a call request monitoring apparatus of a mobile terminal according to the present invention, which will be described in more detail with reference to FIGS. 1 and 2 as follows.

The monitoring device 100 according to the present invention includes an electric field strength detection unit 110, a use mode determination unit 120, a distance measuring unit 130, and a display unit 140.

The electric field strength detecting unit 110 detects electric field strength of radio waves output from the mobile terminal 20 located in the area restricting the call, and converts the electric field strength into a predetermined numerical data signal according to the electric field strength of the detected electric wave. That is, the radio wave output from the mobile terminal 20 is converted into an electrical signal by an antenna (not shown) of an electric field strength detector having a predetermined gain at an operating frequency, but is amplified by a low noise amplifier (LNA) although not shown. After passing through the band pass filter, the mixer having a conversion gain is mixed with a predetermined oscillation signal, converted into an intermediate frequency signal, amplified by an IF amplifier (Intermediate Frequency Amp), and output as predetermined voltage data, that is, numerical data.

The electric field strength detected by the electric field strength detection unit 110 is inversely proportional to the distance separated from the mobile terminal 20, and the electric field strength of the radio wave is reduced and detected.

The use mode determination unit 120 detects the transmission time of the radio wave output from the mobile terminal 20 and determines the position of the mobile terminal 20 to the base station 30 in the standby mode when the radio wave output from the mobile terminal 20 is in standby mode. It determines whether the radio wave requesting a call to register or whether the user requests the call in the call mode to receive the call service, and outputs a signal of the corresponding mode. That is, when the state of the mobile terminal 20 is in the standby mode, the mobile terminal 20 determines a radio wave (for example, outputting a signal including location registration information 200 ms) for registering the location of the mobile terminal to the base station 30. Although output every time, when the mobile terminal 20 is in the call mode, the mobile terminal 20 continuously transmits a request signal for providing a call service to the base station (30). Therefore, the use mode determination unit 120 detects the output duration of the radio wave output from the mobile terminal 20 to determine whether the signal output from the mobile terminal 20 is a signal output from the standby mode or a signal output from the call mode. Can be judged. In the present embodiment, the standby mode and the call mode are determined using the output duration of the radio wave, but the state of the mobile terminal can also be determined using the electric field strength of the radio wave.

The distance measuring unit 130 calculates a distance to the mobile terminal by using a numerical signal output from the electric field strength detection unit 110. That is, the distance measuring unit 130 calculates the distance between the mobile terminal 20 and the monitoring device 100 as 2m when the electric field strength detected by the electric field strength detection unit 110 is 0.5V / m and the voltage difference is 1V. Done.

In addition, the distance measuring unit 130 may store the distance data according to the magnitude of the electric field in advance in a memory (not shown) to calculate the distance to the mobile terminal 20 by comparing the magnitude of the electric field strength of the radio wave. Table 1 is a table of the results of detecting the magnitude of the electric field strength according to the distance. In the experimental condition, the mobile terminal is located at a height of 1.5m from the floor and transmits an output of 0.4 to 0.6W, and the monitoring device is located at a height of 2m from the floor and moves between 0 to 3m from the mobile terminal.

Output (Watt) Field strength by distance (dB㎶ / m) 2 mm 10 cm 20 cm 30 cm 1m 3m 0.4 144 136 133 131 122 116 0.6 147 138 135 133 126 117

As shown in Table 1, the electric field strength detected by the mobile terminal 20 is compared with the data in Table 1 to calculate the distance between the monitoring device 100 and the mobile terminal 20.

In addition, when the signal output from the mobile terminal 20 is a radio wave output in the standby mode, the distance measuring unit 130 does not measure the distance with the mobile terminal 20 that outputs the radio wave.

The display unit 140 displays the position of the mobile terminal 20 according to the distance between the mobile terminal 20 and the monitoring device 100 calculated by the distance measuring unit 130 so that a user can check the number. It consists of LEDs. For example, if 5 LEDs are configured and one of the LEDs displays 2m, when the distance to the mobile terminal is 10m, one LED is turned on and the other LEDs are turned off. The closer the distance to the mobile terminal is, the more the LED is turned on. Increase the number

In addition, when configuring the display unit 140 using the LCD, it is possible to display the electric field strength of the radio wave detected by the electric field strength detection unit 110 in dB, and to display the distance to the mobile terminal 20 in significant figures. It is possible.

3 is a flowchart illustrating an operation of a call request monitoring apparatus of a mobile terminal according to the present invention. The operation of the call request monitoring apparatus of the mobile terminal will be described in more detail with reference to FIGS. 1 to 3.

The electric field strength detection unit 110 detects an electric field strength of an electric wave output to the base station 30 to request a mobile communication service from the mobile terminal 20 in the classroom 10 where the test is being conducted as the call restriction area. The data is converted into numerical data corresponding to the magnitude of the intensity (S100).

After performing step S100, the electric field strength of the radio wave output from the mobile terminal 20 is generated to detect the continuous transmission time (S110), and compare the transmission time of the radio wave with a reference value (S120). In step S120, by detecting the occurrence time of the radio wave output from the mobile terminal 20, the base station 30 requests a radio wave recognition call output to register the location of the mobile terminal with the base station 30 in the standby mode. It is determined whether the radio wave is to determine the use state of the mobile terminal.

If the transmission time of the radio wave in step S120 is greater than the reference value (for example, the output time of the signal for registering the position of the mobile terminal in the base station), the use mode determination unit 120 determines the mobile terminal 20 as the call mode. Request the electric field strength detector 110 to transmit the numerical data to the distance measurer 130, and calculate the distance between the monitoring device 100 and the mobile terminal 20 by the distance measurer 130 (S130). .

In operation S130, the distance calculation to the measurement target object using the electric field strength may use a method using a known electric field strength and a voltage difference, or may use data preset by an experimental value.

After performing step S130, the distance measuring unit 130 outputs the calculated distance information and the numerical data (the electric field strength information of the electric wave) through the display unit 140 (S140). In the step S140, the display unit 140 displays the position of the mobile terminal 20 according to the electric field strength of the radio wave through the on / off of the LED (not shown). That is, the mobile terminal located close to the monitoring apparatus 100 increases the number of lighting of LEDs (for example, 5), and the mobile terminal located far away reduces the lighting number of LEDs (for example, 1).

In addition, it will be apparent to those skilled in the art that a method of outputting the detected electric field strength and the calculated distance numerically when the display unit 140 is an LCD may be easily changed.

On the other hand, if the transmission time of the radio wave output from the mobile terminal 20 in step S120 is less than the reference value, the use mode determination unit 120 determines the use mode of the mobile terminal to the standby mode and the new field strength detection unit 110 Return to step S100 to detect the electric field strength of the generated radio wave again.

Therefore, it is possible to easily check the use of the mobile terminal and the location of the user at a test site or a specific place where the use of the mobile terminal is restricted.

As described above, the present invention has an advantage of preventing unauthorized use of the mobile terminal by monitoring the use of the mobile terminal in a place where the use of the mobile terminal is restricted.

In addition, by blocking the cheating using the mobile terminal at the test site, there is an effect that can provide a fair test evaluation.

In the above, the present invention has been illustrated and described with respect to certain preferred embodiments. However, the present invention is not limited to the above-described embodiments, and those skilled in the art to which the present invention pertains can vary without departing from the spirit of the technical idea of the present invention described in the claims below. It will be possible to carry out the change.

Claims (6)

An electric field strength detector for detecting an electric field strength of the radio wave for the call attempt when the mobile terminal located in the transmission restriction area generates an electric wave for attempting the call; A usage mode determination unit which detects a time duration of the electric field strength of the call attempt radio wave and determines whether it is a signal in a standby mode or a communication mode; A distance measuring unit calculating a distance to the mobile terminal according to the magnitude of the electric field strength of the radio wave detected by the electric field strength detecting unit; And And a display unit for outputting a distance to the mobile terminal calculated by the distance measuring unit as call limit information of the mobile terminal attempting to make a call in the origination restriction area. 2. The call request monitoring apparatus of claim 1, wherein the call restriction area is one of a test site and a performance hall. The apparatus of claim 1, wherein the display unit is at least one of an LED and an LCD. 4. The apparatus of claim 3, wherein the LED is turned on / off in proportion to the distance to the mobile terminal. i) detecting a field strength of the call attempt wave when the mobile terminal located in the origination restriction area generates a wave to attempt the call; ii) determining a usage mode of the mobile terminal according to the electric field strength duration of the radio wave output from the mobile terminal; iii) calculating the distance from the position where the electric field strength of the electric wave is detected to the mobile terminal according to the magnitude of the electric field strength of the electric wave when the usage mode of the mobile terminal is the call mode; And and iv) displaying the calculated distance to the mobile terminal. 6. The method of claim 5, wherein step ii) re-detects the electric field strength of the radio wave when the usage mode of the mobile terminal is a standby mode.

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