KR100696962B1 - Repeater and blocker for wireless communication service - Google Patents

Abstract

The present invention discloses an apparatus for blocking a call in a wireless communication system. The call blocking device includes a noise generator and a directional coupler. The noise generator generates noise to block the call. The directional coupler combines the noise generated by the noise generator with the signal from the base station and outputs the combined signal. By installing a noise generator and a directional coupler in the repeater, a repeater having a call blocking function can be implemented.

Call blocker, noise generator, directional coupler

Description

Wireless communication relay and blocking device {REPEATER AND BLOCKER FOR WIRELESS COMMUNICATION SERVICE}

1 is a block diagram of a conventional wireless mobile communication system composed of a base station, a repeater, and a mobile terminal.

2 is a block diagram of a conventional general mobile communication repeater.

3 is a block diagram of a conventional general mobile communication breaker.

4 is a block diagram of relays and breakers made by implementing the functions of the present invention.

5 is a block diagram of a relay and a breaker made by implementing the function of the present invention.

Figure 6 is a block diagram of a device incorporating a wireless CDMA modem to enable remote control with relays and breakers made by implementing the functions of the present invention.

7 is a block diagram of a device in which a general telephone line modem is combined to enable remote control with a relay and a breaker made by implementing the functions of the present invention.

8 is a block diagram of inbuilding equipment using a small base station according to an embodiment of the present invention.

* Explanation of symbols for the main parts of the drawings

110: base station 120: repeater

121, 201: base station donor antenna 123, 223: mobile station serving service antenna

130: terminal 203, 217: duplexer

205: low noise amplifier 207: frequency conversion converter section

209: frequency synthesizer unit 211: gain regulator

213: high power amplifier 215: directional coupler

219: repeater control unit 221: repeater power supply

300: call blocker 301: noise generator

303: frequency upconverter 305: frequency synthesizer

307: gain regulator 309: power amplifier

311: filter and directional coupler 313: power meter

315 control unit 317 power unit

319: antenna

410, 501, 610, 710: base station donor antenna

440, 527, 640, 740, 850: mobile station service antenna

420, 620, 720, 820: call breaker

421, 505, 623, 721, 821: directional coupler

423, 507, 625, 723, 823: noise generator

425, 627, 725, 825: control unit 427, 629, 729, 827: power supply

430, 630, 730: repeaters 503, 521: duplexer

509: low noise amplifier 511: frequency conversion converter section

513: frequency synthesizer unit 515: gain regulator

517: high power amplifier 519: directional coupler

523: common control unit 525: common power supply unit

621: wireless modem 727: telephone line modem

810: small base station for inbuilding 830: inbuilding donor unit

840 remote unit

The present invention relates to a repeater and a blocker for a mobile communication, and more particularly to a repeater and a blocker for a mobile communication implemented by installing a directional coupler and a noise generator inside or outside the input terminal of the repeater.

Cellular wireless communication systems increase the frequency reuse by dividing the service area into multiple cells, and each cell has a wireless base station to cover each cell area. However, in the service area, the strength of the radio wave reception signal, such as underground or tunnel, is weakened, and there is a dead zone in which communication quality is poor. In such an area, call quality is extremely bad or call is not possible at all. Therefore, in order to make a call in such an area, a method of installing a repeater in a shaded area is used.

1 is a block diagram of a conventional wireless mobile communication system including a base station, a repeater and a mobile terminal. As shown in FIG. 1, the repeater 120 is connected to the base station 110 via a coaxial cable or an air link (airline), and transmits a forward signal transmitted through a wired or wireless link with the base station 110. The signal is received from the counter donor antenna 121 and transmitted to the mobile terminal (or mobile station) 130 through the mobile station counter service antenna 123 through internal signal processing such as an appropriate amplification and filtering process.

In addition, the repeater 120 receives the reverse signal from the mobile station 130 from the mobile station counter service antenna 123 and transmits the internal signal to the base station through the base station counter donor antenna 121 through appropriate internal amplification and filter processes. do.

FIG. 2 is a diagram illustrating an internal configuration of such a repeater. Referring to FIG. 2, the operation of the conventional repeater will be described in more detail as follows.

First, the signal transmitted from the base station is received by the repeater 120 through the base station donor antenna 201. The signal received by the donor antenna 201 is guided by the duplexer 203 to undergo forward signal processing. The signal output from the duplexer 203 is amplified by the low noise amplifier 205, and is frequency downconverted, amplified, filtered, and frequency upconverted by the frequency synthesizer 209 and the frequency conversion converter 207. And the noise component is removed during the amplification process. The signal output from the frequency conversion converter section 209 is taken a predetermined gain by the gain adjuster 211 and amplified by the high output amplifier 213, and then, via the directional coupler 215 and the duplexer 217, against the terminal. It is output as the same signal transmitted from the base station through the service antenna 223. The repeater control unit 219 included in the repeater 120 controls each component included in the repeater, and the repeater power supply unit 221 supplies power necessary for the operation of the repeater. In addition, a signal transmitted from the terminal to the terminal service antenna 223 of the repeater 120 also passes through the same process as described above, and is then transmitted to the base station through the base station donor antenna 201.

On the other hand, contrary to the role of the repeater described above, the call blocker is mainly used in public places where courts, libraries, cinemas, concerts, etc. are held, and places such as churches for religious meetings, and serves to block wireless communication services. It is already used abroad for various purposes as needed.

Conventional call blockers are caused by jamming signals of the call breaker in areas where the wave strength of the breaker is greater than the system process gain relative to the strength of the forward signal being serviced by the currently operating wireless communication base station and repeater. It has been applied to make the call impossible by demodulating the pilot signal transmitted from the base station.

However, the above-mentioned conventional call blocker always has a function of blocking a call by propagating a disturbing signal, and depending on the situation, there is a problem in that a repeater function of amplifying a signal transmitted from a base station and transmitting the signal to a terminal may not function. In addition to the frequency band of the signal to be cut off, spurious waves of other frequency bands are propagated together to cause a problem in communication using adjacent frequency bands. In addition, in order to block a call in a wide area because the output level of the interference signal is low, there is a problem in that the call blocker must be installed in various places.

On the other hand, in addition to the conventional call blocker described above, a call blocking device associated with a plurality of call blockers is Korean Patent Laid-Open Publication No. 1999-0046201, titled 'Invention Call Blocking Device for Personal Mobile Wireless Mobile Communication Terminal'. Korean Patent Laid-Open Publication No. 2000-0031047, which is a method and device for blocking wireless communication using a noise generator, Korean Patent Laid-Open Publication No. 2000-0074654, titled 'Mobile Phone Pollution Preventer', and the name of the invention Korean Patent Application Publication No. 2002-008015, which is a blocking device, and Korean Patent Application Publication No. 2001-0029190, which is named CDMA mobile communication system using a frequency hopping method, and the name of the invention cannot receive a certain area. Japanese Patent Application Laid-Open No. 11-55225, which is a deadband generating device, and Japanese Patent Application Laid-open No. 10-174165, entitled "Wireless Communication Function Prohibition System," Only patent application are disclosed in the No. 1,163,949.

All of these call breaker technologies block a call by generating a jamming signal, and are distinguished according to a method of generating a jamming signal. Specifically, according to a method of generating a jamming signal, a conventional analog method, CW (Continuous Wave) or a narrow-band AM / FM signal generator and a wideband signal generator which is a more wideband signal generator that has been further modified to generate the Method, a method using a wideband FM modulator, a method using a wideband FM modulator, and a method of generating and generating a CDMA pilot PN code generator by FPGA / ASIC or DSP based on digital technology.

3 is a block diagram of an embodiment of a conventional call blocker described above.

As shown in FIG. 3, the jamming signal generated in the noise generator 301 is a low frequency and is then frequency upconverted by the frequency upconverter 303 to the mobile communication service frequency based on the output from the frequency synthesizer 305. . The frequency upconverted jamming signal is largely amplified through the power amplifier 309 after its power is controlled by the gain regulator 307, and propagates through the filter and the directional coupler 311 toward the terminal through the antenna. do. Jamming signals propagated toward the terminal block the call by interrupting normal communication of the terminal. On the other hand, the power of the jammer currently generated through the power meter 313 is measured and delivered to the control unit 315, the control unit 315 so that the power level of the jammer can be maintained at an appropriate level feedback loop (feedback loop) ) To control the gain of the gain adjuster 307. On the other hand, the controller 315 provides the frequency synthesizer 305 with the frequency setting data so that the frequency setting data transmitted to the frequency synthesizer 305 fits the frequency band to which the service is to be cut off.

However, the above-mentioned methods are only for blocking call signals, which causes a problem of complicated system implementation. For example, when generating a jamming signal using a pilot PN code generator based on digital technology, a modulator for digitally-analog converting the generated jamming signal, and for converting the converted frequency, which is an IF signal band, to an RF band. In addition to the PN code generator, a frequency synthesizer, an uplinker, and a large power amplifier for amplifying a signal converted to an RF band should be included. As another example, when generating a jamming signal using a wideband FM modulator, a frequency synthesizer, an uplinker, and a large power amplifier other than the digital-analog conversion modulator should be additionally included. In addition, even in the case of generating a jamming signal using a noise generator, the additional components are complicated to implement the system.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to combine the noise with a signal from a base station and a noise generator that generates noise in front of a repeater to block a call in a wireless communication system. To provide a call blocking device comprising a directional coupler.

It is another object of the present invention to provide a call blocking device comprising a noise generator for generating noise in order to block a call in an in-building relay system, and a directional coupler for combining the noise with a signal from a base station.

It is a further object of the present invention to provide a repeater comprising a noise generator which generates noise to cut off a call in a wireless communication system and a directional coupler combining the noise with a signal from a base station.

An apparatus of the present invention for achieving the above object, in a wireless communication system, installed in the front of the repeater to block the call between the base station and the mobile station, the apparatus comprising: a noise generator for generating a noise for blocking the call; A directional coupler which combines the signal from the base station and the noise and outputs the combined signal to the repeater; A controller for controlling the operation of the noise generator and the directional coupler; And a power supply for supplying power.

On the other hand, the present invention further includes a transceiver for transmitting and receiving a remote control command to remotely control the call blocking device, the transceiver receiving and outputting the remote control command to the controller, the controller is the remote control According to a command, the operation of the noise generator and the directional coupler is controlled.

Meanwhile, the present invention relates to an in-building small base station for receiving and amplifying a wireless communication signal from a base station, an in-building donor unit for distributing a signal from the in-building small base station into a plurality of signals, and the in-building donor unit. An in-building relay system including a plurality of remote units for receiving a plurality of signals distributed by each and outputting through a plurality of antennas respectively installed, wherein the call blocking device includes the small base station for in-building and the in-building donor unit. It is installed between.

On the other hand, the present invention is a repeater in a wireless communication system comprising a forward module for receiving and amplifying a signal from the base station and then transmitting to the mobile station and a reverse module for receiving and amplifying the signal from the mobile station and transmitting to the base station, the forward direction The module may include a noise generator for generating noise for blocking a call; A directional coupler combining the signal received from the base station and the noise; A low noise amplifier for amplifying the combined signal; And a frequency converter and a high output amplifier for frequency converting the signal amplified by the low noise amplifier to high output amplification.

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

4 is a diagram illustrating a configuration in which a call blocker according to the present invention is installed at a repeater input terminal. As shown in FIG. 4, the call blocker 420 according to the present invention is located between the repeater 430 and the base station donor antenna 410 to serve to block a call with the mobile station.

Referring to the detailed configuration of the call blocker 420 according to the present invention with reference to Figure 4, the call blocker 420 is generated in the noise generator 423, the noise generator 423 for generating a noise signal for blocking the call The directional coupler 421 for combining the received noise with the signal received from the base station donor antenna 410, the control unit 425 for controlling the operation of the call breaker 420, and the power supply for supplying power required for the operation of the call breaker 427. The operation of the call blocker 420 will be described in more detail as follows.

As shown in FIG. 4, the call blocking scheme according to the present invention simply uses a directional coupler 421 and a noise generator 423 at an input port portion of the base station-to-donor donor antenna 410 of the repeater 430. It can be implemented simply by using First, in a typical case where no call blocking is required, the noise generator 423 is turned off so that only a normal signal input received from the base station is input to the repeater 430 so that service can be performed even in a shadowed area. Can be. However, if it is necessary to block a call at the request of an administrator or at a predetermined time, the controller 425 receives a request to block the call and turns on the noise generator 423 to generate a noise signal. The generated noise signal and the signal from the base station received at the base station donor antenna 410 are combined in the directional coupler 421.

At this time, the strength of the noise signal generated by the noise generator 423 should have a sufficient level such that the jamming signal output from the repeater 430 does not allow a mobile communication service in an area where call blocking is desired. For example, if the strength of the noise signal generated by the noise generator 423 has a level higher than the processing gain of the signal received from the base station, the mobile communication service is not performed in the region where the call blocking is desired. Relatively low output levels that can be created using only (423)).

On the other hand, with respect to the output level of the noise signal, the frequency breaker of the signal is improved by further including a filter, a frequency converter, a variable gain regulator and a high output amplifier using the SAW filter in addition to the noise generator 423 in the call breaker 420, You can also variably amplify the level of the output noise signal to adjust the range of the area you want to block calls.

In addition, a level meter is further installed in the call breaker 420 to measure the level of the noise generator 423 output signal and to maintain the output level so that the level of the measured output signal does not exceed a predetermined range, thereby using minimum power. To control the operation of the noise generator 423.

5 is a block diagram of a repeater installed in the call blocker according to the present invention. The repeater shown in FIG. 5 has the same configuration as the conventional repeater shown in FIG. 2 except for including a noise generator 507 and a directional coupler 505 to block the call. That is, the signal from the base station received from the base station donor antenna 501 is combined with the noise signal generated by the noise generator 507 and the directional coupler 505 and input to the low noise amplifier 509, and the low noise amplifier 509 For the signal input to the same signal processing as the signal processing in the repeater shown in FIG. On the other hand, the signal coupled to the output from the directional coupler 505 is a signal coupled to the noise transmitted from the base station, and transmitted from the terminal service antenna 527 to the terminal, even if received at the terminal to the directional coupler 505 Due to the combined noise signal, the original signal transmitted from the base station cannot be demodulated and the call is blocked.

FIG. 6 is a diagram illustrating a configuration in which the call breaker 620 can be controlled wirelessly by installing the wireless modem 621 in the call breaker 620 shown in FIG. 4. The directional coupler 623 shown in FIG. 6 is a dual directional coupler, and the wireless modem 621 can directly transmit / receive with the base station through the dual directional coupler 623 and the base station donor antenna 610.

If a call block is desired, the administrator can remotely send a call blocking command to the call blocker 620 via the wireless modem 621, and the call blocking command transmitted through the wireless modem 621 is sent to the controller 627. It is transferred and controlled by the controller 627 to control the operation of the call breaker 620, so that the call can be blocked remotely.

FIG. 7 is a diagram showing a configuration in which the call breaker 720 can be controlled using a regular telephone by installing a telephone line modem 727 in the call breaker 720 according to the present invention shown in FIG. 4. The specific operations are the same as those in the call breaker of FIG.

8 is a diagram showing a configuration in which the call blocker 820 according to the present invention is installed in the in-building distributed relay device.

The in-building distributed relay device is a device for solving a problem such as a shadow area in a large building, etc. The operation thereof will be briefly described as follows.

The forward signal output from the small base station 810 for in-building is transmitted to each remote unit 841, 843,... Installed in each floor of the large building through the in-building donor unit 830. Forward signals sent to the remote units 841, 843, ... are transmitted to the terminals inside the building via the terminal service antennas 851, 853, ....

As shown in FIG. 8, the call blocker 820 according to the present invention is installed between the in-building small base station 810 and the in-building donor unit 830, thereby effectively blocking a call in a large building. have. That is, by combining the noise signal generated by the noise generator 823 with the forward signal from the small base station 810 for in-building by using the directional coupler 821 to combine the noise signal with the forward signal, the forward signal in the terminal You can block calls from inside large buildings by preventing them from demodulating.

According to the present invention, since the RF block of the repeater used in the conventional call blocker uses the RF part of the repeater, there is no need to install in duplicate, so it is possible to economically implement the call blocker, the repeater with excellent RF output characteristics operated by the operator By doing so, it is possible to have precise, accurate and broader call blocking service.

For example, in the case of a conventional call breaker with a power output of 10 mW, the call blocking area is only a few hundred square meters, so in order to block a call in a wider place, several call breakers need to be installed. According to the breaker, by using a repeater, it is possible to block a call in a desired area for each type of repeater.

In addition, according to the present invention, by using a repeater can make the jamming signal passing only the desired carrier band to block the call, there is an effect that can minimize the unnecessary spurious signal generation, such as interrupting the call signal of other companies. .

In addition, according to the present invention, the output power is continuously measured by the power meter inside the repeater with respect to the jamming signal currently being output using the repeater, and the gain adjuster is adjusted to fit the desired output range. Precise control is possible.

In addition, according to the present invention, by installing a control unit in the call breaker to control the noise generator to turn on or off as necessary, in the chapel, such as a church in the usual times to turn off the noise generator to service as a repeater function is necessary during worship time, etc. By the automatic or manual, or by installing a modem or the like to turn on the noise generator remotely from the outside there is an effect that can be controlled to disable the call service.

In addition, according to the present invention, by installing the noise generator and the directional coupler inside the repeater in common to use the power unit and the control unit of the repeater has the effect that can be economically implemented without adding the power unit and the control unit of the call breaker.

In the above described and illustrated with respect to the preferred embodiment of the present invention, the present invention is not limited to the specific embodiments described above, anyone of ordinary skill in the art without departing from the gist of the present invention Various modifications are possible, of course, and such variations will be within the scope of the claims of the present invention.

Claims (6)

In a wireless communication system comprising a base station, a mobile station, and a repeater for amplifying and transmitting a signal from the base station or the mobile station to the mobile station or the base station, In the apparatus connected to the repeater to block the call between the base station and the mobile station, A noise generator for generating call blocking noise; A directional coupler which combines the signal received from the base station and the generated noise and outputs the combined signal to the repeater; And And a controller for controlling the operation of the noise generator and the directional coupler. The method of claim 1, Further comprising a transceiver for transmitting and receiving a signal including a remote control command for remotely controlling the call blocking device, The transceiver receives and outputs the remote control command to the controller, And the control unit controls an operation of the noise generator and the directional coupler according to the remote control command. The method of claim 2, The transceiver is characterized in that the transceiver is a wireless modem. The method of claim 2, The transmission and reception unit is a call blocking device, characterized in that the wired modem. An in-building small base station for receiving and amplifying a wireless communication signal from a base station, an in-building donor unit for distributing a signal from the in-building small base station into a plurality of signals, and a plurality of signals distributed by the in-building donor unit An in-building relay system including a plurality of remote units each receiving and outputting to a mobile station through a plurality of antennas respectively installed, An in-building relay system, wherein the call blocking device according to any one of claims 1 to 4 is installed in a communication path between the in-building small base station and the in-building donor unit. In a repeater having a call blocking function, The repeater forward module receives a signal from the base station, amplifies and transmits to the mobile station; And A reverse module for receiving a signal from the mobile station, amplifying the signal, and transmitting the amplified signal to the base station; The forward module, A noise generator for generating call blocking noise; A directional coupler combining the signal received from the base station and the noise; A low noise amplifier for amplifying the combined signal; A frequency converter and a high power amplifier for frequency amplifying the signal amplified by the low noise amplifier and amplifying the power output; And And a controller for controlling the operation of the noise generator, the directional coupler, the low noise amplifier, and the frequency converter and the high power amplifier. And the controller controls on / off of the noise generator so that the call blocking function of the noise generator is turned on / off.

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