KR20020005071A - A Jammer for the Mobile Phone - Google Patents

Abstract

PURPOSE: An interruption radio wave generating apparatus for mobile phone is provided to provide only a minimum character message service for a mobile phone by transmitting information as to whether the interruption radio wave generating apparatus is operated through a continuous signal exchange through a signal exchange by a mobile phone base station. CONSTITUTION: A controller(10) turns on a switch(50) and a waveform generator(20) generates an interference wave and transmits it to a voltage control oscillator(30). Then, the voltage control oscillator(30) generates a corresponding frequency according to a reference voltage inputted from the controller(10), modulates the wave for an interference wave coming through the waveform generator(20) and transmits it by being carried on a corresponding frequency. A power amplifier(40) amplifies the output of the frequency. A band pass filter(60) passes only a frequency of a DCS/PCS band of the frequency component and transmitted. An interference wave is intermittently transmitted according to a certain period through an interface(70) including a key input unit for setting a time for operating a generated interference wave from a user and a display unit for confirming the operation. An ON/OFF time arranged with a base station is constantly operated, so that the base station detects whether a mobile phone is located in an interference wave generation area, switches a voice mode to a data service mode to provide a character message(SMS) service to the user.

Description

Jammer for mobile phone {A Jammer for the Mobile Phone}

The present invention relates to a jammer generator for mobile phones, and more particularly, to interrupt people or any situation around them by using unlimited mobile phones in public places such as concert halls, lecture halls, conference rooms, etc. to block radio waves of mobile phones. The present invention relates to a jammer generator for a mobile phone, which is prohibited from using the service and only allows a function of a short message service (SMS) function.

In general, the harmful effects of mobile phones commonly used in public places, such as performance halls or lecture halls, cause damage to other people around you by noise caused by phone calls by users of mobile phones, or cause unintended harm to the atmosphere of public places. There was such a problem.

In order to prevent such harmful effects, a technique for totally prohibiting the use of a mobile telephone by a device generating a jammer is also introduced.

However, in the above technique, the existing mobile phone jammers generate jammers that completely block downlink bands provided from the base station to the mobile phone, whereby the mobile phone terminal is shaded (not serviceable). It detected that it existed in the region) and blocked all services such as voice service and data service.

As a result, the terminal of the mobile phone operates in its own power control mode to find a base station, thereby reducing the battery life of the user's mobile phone terminal. Also, in case of an emergency, the mobile phone user can use the mobile phone. Since there was no problem, there was a problem that can not cope with the emergency.

Due to these problems, most of them oppose the use of mobile phones in public places, but some users and service providers are opposed to the total use of mobile phones.

Accordingly, the present invention has been made in view of the above-mentioned problems, and the present invention detects an interference signal at a base station and converts it into a text data service for a mobile phone terminal in an interference generation area. It is an object of the present invention to provide a jammer generator for a mobile phone in which a function of a service is available.

1 is a block diagram of the present invention

2 is a flow diagram of the operation of the present invention

* Description of the symbols for the main parts of the drawings *

10 ..., control unit 20 ..., waveform generator

30 ..., voltage controlled oscillator 40 ..., power amplifier

50 ..., switch 60 ..., band filter

70 ..., interface

The present invention is a waveform generator for generating a jammer in order to achieve the object as described above; A voltage controlled oscillator which generates a corresponding frequency according to a reference voltage input from a controller, receives a waveform of a jammer, and modulates the waveform to be carried on the corresponding frequency; A power amplifier for amplifying the frequency output in the voltage controlled oscillator; A switch for selecting power on / off according to a signal from the controller; A band pass filter passing the frequency component output from the power amplifier only the frequencies of the DCS / PCS bands; An interface having a key input unit for setting an operating time of jammer generation from a user and a display device for checking the current time and operation; Control unit for controlling the operation of the jammer generation, control the user interface, the control unit having a function of digital / analog conversion control for generating a reference voltage of the voltage controlled oscillator, switch control for the routing of the circuit A jammer generator is provided.

Hereinafter, with reference to the accompanying drawings will be described on the basis of the preferred embodiment of the technical configuration and operation effects of the jammer generator for mobile phone of the present invention.

(Example)

The jammer generation operation of the present invention has the same basic operation method (downlink blocking), but the time base control allows the base station to recognize a terminal located in the jammer generation area, thereby providing a data service other than the voice service mode. By switching to the user, some functions of the mobile phone, that is, the text message sending function, are enabled.

That is, as shown in FIG. 1, when the switch 50 is turned on by the operation of the control unit 10 and the jammer is generated by the waveform generator 20 and sent to the voltage controlled oscillator 30, the voltage control is performed. The oscillator 30 generates a corresponding frequency according to a reference voltage input from the control unit 10, modulates a waveform for jammers introduced through the waveform generator 20 and sends it on the corresponding frequency.

Subsequently, the power amplifier 40 amplifies the output of the frequency and passes through the band pass filter 60 to pass the frequency component of the DCS / PCS band, and transmits it. Through the interface 70 including a key input unit for setting the time and a display device for checking the operation, the jammer transmission is intermittently performed at regular intervals. As shown in FIG. 2, the jammer generation is always performed. Unlike the operation of the generator, by constantly operating the contracted on / off time with the base station, the base station detects whether the mobile phone terminal is located under the jammer generation area, switches from the voice mode to the data service mode, and sends a text message to the user. Provides messaging (SMS) service.

In order to accurately detect at the base station whether the mobile phone terminal is located under the jammer generation area, the ON time of the jammer is gradually reduced within the period, and the on / off period is continuously repeated.

The relationship between them is that when the terminal is not in the jammer generating area (operation of the jammer is turned off) as shown in Fig. 3, the mobile telephone is used, but the voice is generated during one cycle of the jammer. For example, the base station determines that the mobile phone terminal is in the jammer area so that only a text message service (SMS) is available for the terminal.

Subsequently, voice and data services cannot be provided while the jammer is turned on, and only a text message service (SMS) service can be provided during the OFF period of the jammer.

As described above, the jammer generator for the mobile phone continuously transmits information through the signal exchange whether or not the jammer is operated in the mobile phone base station, thereby minimizing the interference of the mobile phone during the operation of the jammer. As a text message service only, it can be useful in places where minimal public morals are required, such as lecture rooms, conference rooms, concert halls, etc., and is differentiated from technology that completely blocks mobile phones.

Although the jammer generator for a mobile telephone of the present invention has been described based on a limited embodiment, the present invention is not limited to the above-described embodiment, and is generally in the technical field to which the present invention belongs without departing from the gist of the present invention. Various changes and modifications can be made by those skilled in the art, which is naturally within the scope of the present invention.

Claims (1)

In implementing the jammer generator for mobile phones, A waveform generator for generating jammers; A voltage controlled oscillator which generates a corresponding frequency according to a reference voltage input from a controller, receives a waveform of a jammer from the waveform generator, modulates the waveform, and sends the modulated wave to a corresponding frequency; A power amplifier for amplifying the frequency output in the voltage controlled oscillator; A switch for selecting power on / off according to a signal from the controller; A band pass filter passing the frequency component output from the power amplifier only the frequencies of the DCS / PCS bands; An interface having a key input unit for setting an operating time of jammer generation from a user and a display device for checking the current time and operation; And a controller having a function of controlling the operation of the jammer, controlling the user interface, digital / analog conversion control for generating a reference voltage of a voltage controlled oscillator, and switch control for setting a path of a circuit. Jammer generator for mobile phones.