JP2005045839A - Transmission confinement method of cellular phone - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To aim at forbidding only voice communication without regulating non-telephonic communication using a mobile phone within a specific area where a voice speech is regulated, relating to a transmission confinement method of a cellular phone in a cellular phone system configured of a base station and the mobile phone connectable with the base station by radio. <P>SOLUTION: A jamming instrument is formed in the specific area to restrict the utilization of the mobile device, and it has a jamming generating portion which outputs jamming radio to the specific area by a control channel monitoring portion and the control of the control channel monitoring portion. If the control channel monitoring portion supervises a control channel between the mobile device and the base station in the specific area, and detects a signal representing a call of speech communication, it constitutes so that the jamming radio is generated by driving the jamming generating portion only to a radio channel for telephone conversation. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a communication restriction method for a mobile phone that interferes with communication of a radio device that starts communication using a call channel specified by a radio signal, and more particularly to effectively disturb only a call, for example, a base station and the base station The present invention relates to a communication restriction method for a mobile phone that can prevent problems caused by a phone call at a specific location if it is applied to a mobile phone system including a mobile device connected wirelessly.

  In recent years, mobile (mobile) telephones have become widespread in general, and it has become a problem that call voices disturb the surroundings. At this time, since the data communication is relatively quiet, there is a demand for effectively preventing only annoying voice caused by conversation.

  Means for detecting that the mobile phone is in use or in a usable state in the space of the facility, and generating a warning to stop the use of the mobile device based on the detection signal from the detection means Or forcibly move by providing a means for generating a signal to disturb the conversation by the mobile device based on the detection signal from the detection device that detects that the mobile device is in use or in a usable state. There is a technique for prohibiting communication by a machine (see Patent Document 1).

  On the other hand, in recent years, packet communication using a mobile phone (mobile device) alone and data communication performed by connecting a personal computer to the mobile phone have become widespread.

In various facilities, there is a case where data communication is urgently required using a mobile phone. For example, the use of voice calls such as a library, a restaurant, and a train is desired to be restricted, but there is a case where communication that does not output non-voice communication from a speaker such as data communication may not be restricted.
Japanese Patent Laid-Open No. 10-42371

  According to the above-described conventional technology, there is a problem that even non-voice communication such as data communication is prohibited even though it is desired to prevent only nuisance to surroundings by voice. Moreover, according to the above-described conventional technology, it is necessary to transmit the jamming radio wave to the entire frequency band used for a call for disturbing communication by the mobile device, and there is a problem that a large amount of power is consumed.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a mobile phone communication restriction method capable of starting disturbance before communication (voice communication) starts.

  In addition, the present invention provides a mobile phone communication restriction method capable of prohibiting only voice calls without restricting non-telephone communication using a mobile device in a specific area where voice calls are restricted. The other purpose is to save the electric power generated for interference.

  Furthermore, it may be inconvenient if voice communication by all mobile devices in a specific area is completely prohibited, and only for a specific user's mobile device that requires urgent communication even in a specific area. One of the other purposes is to enable voice communication. Another object is to realize interference with a simpler configuration without adding a function of transmitting a predetermined control signal to the base station.

  FIG. 1 is a diagram showing a principle configuration of the present invention. In the figure, reference numeral 1 denotes a jamming device which transmits a jamming radio wave for limiting communications provided in a specific area where radio communications (in particular, an embodiment relating to cellular phone communications is described) is desired, and 10 is mobile A control channel monitoring unit for monitoring a control channel communicated between the mobile station and the base station, 10a is a voice communication detecting means for detecting outgoing or incoming calls in which voice communication is performed by checking the contents of the control channel, 10b is Receiving channel detection means for detecting a receiving channel designation signal for a mobile phone and acquiring a designated receiving channel, 11 is a disturbing radio wave generator for generating a jamming radio wave for a specified specific channel (downlink), and 2 is the specific Mobile devices (cell phones) with voice communication and data communication functions located within the area, 2 'is a mobile device (mobile phone) located outside a specific area 3 is a base station provided for each area and wirelessly communicates with the mobile device 2 in the area, 4 is a specific area where call restriction is performed, and 5 is a service area covered by the base station 3 The specific area 4 is a partial area of the service area 5.

  When the mobile device (cell phone) 2 transmits / receives a control signal to / from the base station 3, the control channel monitoring unit 10 of the jamming device 1 monitors the control channel, and the contents of the control signal received by the control channel are voiced. By inputting to the communication detection means 10a, it is detected that the base station starts voice communication, that is, a telephone call, to the mobile device (mobile phone). If the control signal is a reception channel designation signal for the mobile phone, the channel is detected by the reception channel detecting means 10b. The control channel monitoring unit 10 supplies the driving signal together with the detected channel information to the interfering radio wave generating unit 11, thereby transmitting the interfering radio wave only to the channel (downlink) designated by the interfering radio wave generating unit 11. There is no need to generate jamming radio waves on other channels, and power can be saved compared to outputting jamming radio waves on all channels for voice communication. Since the control channel is not disturbed, control signals can be transmitted and received between the mobile device 2 and the base station 3.

  FIG. 2 shows a second principle configuration of the present invention. In the second principle configuration, devices and areas indicated by reference numerals 2, 2 ′, 3 to 5 in FIG. 1 are omitted, and only the configuration of the disturbing device 1 is shown. This second principle configuration is common to the first principle configuration in that the call by the mobile device in the specific area 4 in the service area 5 covered by the base station 3 is limited as in FIG. Only the mobile devices registered in advance within the mobile devices in 4 can be controlled so as to permit (or prohibit) the call. 2, reference numerals 1, 10, 10a, 10b, and 11 are the same as those shown in FIG. In the jamming device 1, 12 is a mobile device check unit, and 12a is a mobile device identification information storage unit.

  Movement of the jamming device 1 using a control channel for transmitting / receiving mobile device identification information that permits (or prohibits) communication within a specific area between the base station 3 and the mobile device 2 or by direct input to the jamming device 1 Register in the mobile unit identification information storage unit 12 a of the unit check unit 12. Thereafter, when a control signal for outgoing / incoming calls is transmitted / received between the mobile station 2 (FIG. 1) and the base station 3 (FIG. 1) in the specific area 4 (FIG. 1) using the control channel, the jamming device 1 The control channel monitoring unit 10 detects the mobile unit identification information in the signal transmitted and received through the control channel and the designated channel for communication (for calling), and registers in the mobile unit identification information storage unit 12a in the mobile unit check unit 12 If the coincidence is detected by comparing the detected mobile device identification information with the detected mobile device identification information, the interfering radio wave generation unit 11 is not caused to generate an interfering radio wave between the mobile device and the base station. If communication is executed and no match is detected, the jamming radio wave generation unit 11 is caused to generate jamming radio waves on the designated channel (downlink) for communication.

  In the second principle configuration shown in FIG. 2, on the contrary to the above, the jamming radio wave is used to limit voice communication in a specific area for a mobile device that matches a specific mobile device identification information registered in advance. It is possible to control so that voice communication is permitted to other mobile devices (mobile devices whose identification information cannot be matched).

  According to the present invention, it is possible to forcibly prohibit call communication by a mobile device (mobile phone) in a specific area. Further, since it is not necessary to generate jamming radio waves in all the radio channels in order to prohibit call communication, it is possible to save power for generating jamming radio waves. Further, it is possible to restrict communication so that call communication is permitted (or prohibited) only to a specific mobile device (mobile phone) registered in advance in a specific area.

  FIG. 3 shows a block configuration of an embodiment of the jamming device. In the figure, 1a is a receiving antenna, 1b is a receiver that receives an upstream signal of the control channel, 1c is a receiver that receives a downstream signal of the control channel, 1d is a control unit, 1e is a jammer transmitter, and 1f is a transmitter. Represents a trusted antenna.

  4 and 5 are diagrams for explaining the operation of the disturbing device of the first embodiment. FIG. 4 is a sequence of signals between the base station, the mobile device (mobile phone), and the disturbing device when a mobile phone makes a call. FIG. 5 is a processing flow of the control unit (1d in FIG. 3) of the disturbing device according to the first embodiment.

  One mobile device (sometimes referred to as 2 or 2 in FIG. 1) is within a service area (5 in FIG. 1) of the base station (3 in FIG. 1) and a specific area (4 in FIG. 1) where communication is restricted. ) And another mobile device (2 ′ in FIG. 1, which may also be a mobile phone) is located outside a specific area. Mobile devices within the service area can transmit and receive control signals to and from the base station via the control channel. The receivers 1b and 1c of the interfering device shown in FIG. 3 respectively receive the uplink control signal from the mobile station to the base station and the downlink control signal from the base station to the mobile station. When a plurality of uplink and downlink control channels are used, a receiver may be provided according to the number. When the mobile device 2 in the specific area makes a voice communication call, control signals are transmitted and received between the mobile device and the base station according to the sequence shown in FIG.

  That is, communication using the wireless control channel is possible between the mobile device 2 and the base station 3 (a in FIG. 4), and the mobile device 2 sends a call setup signal including a voice communication display to the uplink control channel. To the base station 3 (b in FIG. 4). At this time, the device number (MSI) of the mobile device 2 is included in the call setup, and the outgoing radio status report is also sent in the form of carpooling. Upon receiving this call setting, the base station 3 requests the user equipment 2 to authenticate the user's authentication request by the downlink control channel according to the conventional protocol (digital type automobile telephone system standard RCR-STD27H) (c in FIG. 4). ), An authentication response of the user is sent from the mobile station 2 through the uplink control channel (d).

  Upon receiving this, the base station 3 designates a radio channel (call channel) to be allocated for the call to the mobile device 2 that has made a call using the downlink control channel (e in FIG. 4). The base station 3 shifts the radio channel between the mobile station 2 to the designated call channel from the control channel, and the mobile station 2 that receives the designation of the radio channel also shifts to the call channel (f in FIG. 4). Here, according to the processing flow of FIG. 5 to be described later, the jamming device transmits the jamming radio wave from the jamming radio wave transmitter to the designated call channel (downlink) via the antenna (g in FIG. 4).

  The operation of the disturbing device at this time is shown in detail in FIG. The jamming device always monitors the uplink and downlink control channels with the receivers 1b and 1c shown in FIG. 3 (S1 in FIG. 5), and determines whether a call setup signal (signal b in FIG. 4) from the mobile device has been received ( If it is not received, the monitoring is continued. If it is received, it is determined whether the type of communication requested in the call setting is a voice call or a non-voice call (data communication) (S3). The display of the communication type is defined in the conventional protocol (the protocol described in the standard RCR-STD27H). In the case of non-voice communication (data communication), nothing is done (without generating disturbing radio waves), but in the case of voice communication, it is determined whether the received signal level is above a certain value (see FIG. 5). S4) If the predetermined level is not reached, the process returns to S1. If the predetermined level is exceeded, the mobile station identification information (for example, mobile station number) included in the received call setting signal is stored (S5). .

  Thereafter, a signal designating the communication channel addressed to the stored identification information (mobile unit number) is received from the downlink control channels (S6 in FIG. 5), and the designated communication channel is obtained (S7). . The acquired call channel information is input to the jamming radio wave transmitter (1e in FIG. 3), and the jamming radio wave transmitter transmits only the jamming radio wave for the call channel (downlink) for a predetermined time (S8 in FIG. 5). In this case, the mobile device 2 tries to start communication on the communication channel (downlink) designated by the signal e in FIG. 4 above, but receives a signal from the base station by the jamming radio wave from the jamming radio wave transmitter. It is impossible to shift to a telephone call. As a result, the mobile station in the specific area (4 in FIG. 1) where the call restriction is performed cannot make a call.

  When the target mobile phone (cell phone) system is a TDMA (Time Division Multiple Access) system, the channel designated for the call from the base station in S7, that is, the designated frequency and time slot is detected, Although the jamming radio wave is transmitted in S8, FIG. 6 shows a timing chart of the jamming radio wave transmitter in that case.

  In the example shown in FIG. As shown in FIG. 4, a downlink call signal is transmitted to the mobile station using three slots (slot1, slot2, slot3) for a certain channel from the base station (the uplink call signal from the mobile station to the base station is not shown) ). At this time, a. When a jamming wave is generated in slot 2 (slot 2) of the channel of FIG. 6, b. Of FIG. 6 is synchronized with the timing of slot 2 for transmitting a call signal (downlink) from the base station to the mobile station. Transmit the jamming signal as shown in. As a result, the mobile device in the call restriction area is displayed in the c. As shown in FIG. 2, it becomes impossible to receive a voice call by the slot 2. In addition, although the mobile station in the reach of the jamming radio wave receives the downlink radio wave of the base station at almost the same timing as the jamming radio wave transmitter, d. As shown in FIG. 6, it does not affect other mobile devices that are in the same channel as the jamming wave but are communicating (for example, data communication) in another slot (slot 3 in FIG. 6).

  Note that it is not necessary to completely transmit the jamming radio wave (over the entire slot), but a section of a part of the slot may be used. Further, it is only necessary to have information on the frequency time slot to be set for the channel designation in the same manner as the mobile station has, and the jamming radio wave is transmitted using the information.

  FIG. 7 and FIG. 8 are diagrams for explaining the operation of the jamming device when the mobile device receives an incoming voice communication. FIG. 7 shows a sequence of control signals between the base station, the mobile device, and the jamming device at the time of the incoming call. FIG. 8 is a processing flow of the control unit of the disturbing device when receiving an incoming call according to the first embodiment.

  When the mobile station 2 and the base station can transmit and receive a control channel (a in FIG. 7), when a voice communication call is made to the mobile station 2 in a specific area, the base station 3 performs paging ( A signal (notifying the call) is transmitted to the mobile device 2 (same as b). When the mobile station 2 reports the incoming radio state accordingly (c in FIG. 7), it transmits an authentication request from the base station 3 (same as d) and returns an authentication response from the mobile station 2 (same as e). A signal for designating a radio channel for a call is sent from the station 3 to the mobile device 2 (same as f). Thereafter, the mobile device 2 and the base station 3 shift to the call channel (g in FIG. 7). All of a to f in this sequence are transmitted and received on the control channel, but the signals of these control channels are received by the jamming device 1, and a call in which the jamming radio wave is designated by the base station 3 by the control operation in the jamming device 1 described later. Is transmitted for a certain period of time (h in FIG. 7), and voice communication by the mobile device 2 is obstructed. Normally, after a call channel is specified (g in FIG. 7), a call setup signal is sent from the base station 3 to the mobile station 2 after shifting to the specified radio channel (i in FIG. 7). The mobile device 2 cannot receive the received jamming radio wave.

  As shown in FIG. 8, the processing flow of the control unit of the jamming device in the case of an incoming call receives the uplink and downlink of the control channel (S1 in FIG. 8), paging (b in FIG. 7), and incoming radio status report ( It is determined whether or not c) in FIG. 7 has been received (S2 in FIG. 8), and if not received, the process returns to S1, but if received, it is determined whether the call is a voice call (S3). In this case, in order to determine whether the call is a voice call or a non-voice call, the base station adds a signal indicating whether it is voice communication or non-voice communication (data communication) data to the incoming signal. It is assumed that a signal is transmitted (because the paging signal at the time of arrival of the standard RCR-STD27H protocol does not include a signal indicating the type).

  If it is not a voice call, the process returns to S1, but if it is a voice call, it is determined whether the reception level of the incoming radio state report signal (c in FIG. 7) from the mobile device 2 is equal to or higher than a certain value (S4 in FIG. 8). If the value is equal to or greater than a certain value, the mobile device identification information (mobile device number) included in the paging signal (b in FIG. 7) or the incoming radio status report (c in FIG. 7) is stored (S5 in FIG. 8). Thereafter, when a radio channel designation signal (f in FIG. 7) for a call addressed to the stored identification information (mobile unit number) is received (S6 in FIG. 8), the designated call channel is detected (specified) (FIG. 8). S7), the jamming radio wave is transmitted for a predetermined time to the call channel (downlink) detected from the transmitter (S8).

  In the first embodiment, the voice communication is restricted (disturbed) by all the mobile devices in the specific area (the area where the call is desired to be restricted) in both cases of outgoing and incoming calls. Can be controlled without restricting voice communication, and other mobile devices can be prohibited. On the other hand, it is also possible to perform control so that voice communication is prohibited only for mobile stations registered in advance and voice communication is enabled for other mobile stations, which will be described below.

  FIG. 9 and FIG. 10 are explanatory diagrams of the second embodiment that enables voice communication of only a specific mobile device by telephone number. FIG. 9 is a processing flow of registration of mobile device identification information (for example, a telephone number) according to the second embodiment, and FIG. 10 is a processing flow of the control unit of the disturbing device at the time of calling according to the second embodiment. The signal sequence among the base station, the mobile device, and the jamming device when the mobile phone according to the first embodiment shown in FIG. 4 makes a call is also applied to the jamming device according to the second embodiment.

  First, the jamming device is set to the registration mode (S1 in FIG. 9), and the user inputs the identification information (phone number) of the mobile device to be excluded from the restriction of voice communication (call) by the input device (not shown). , It is registered in a memory (not shown) in the control unit of the voice restriction device (S2 in FIG. 9).

  After such registration, the processing flow shown in FIG. 10 is executed to monitor the uplink and downlink of the control channel between the mobile station and the base station in the specific area where the call is restricted (S1 in FIG. 10). It is determined whether or not the setting signal (signal b) has been received (S2). If not, the process returns to S1. If received, the “calling number” in the call setting signal (signal b) is registered in the memory in the control unit. It is determined whether or not the telephone number matches (S3). If there is a match, the process returns to S1, and the call of the mobile device is not restricted. If the calls do not match, it is determined whether the reception rate of the control signal is equal to or greater than a certain value (S4). If the value is equal to or greater than a certain value, the mobile station identification information (mobile station number) is stored (S5). Thereafter, when a control signal (signal e) for designating a radio channel addressed to this identification information (mobile unit number) is received (same as S6), the designated call channel information in the signal is obtained (S7), and jamming radio wave transmission is performed. The jamming radio wave is transmitted for a certain period of time on the call channel (downlink) acquired from the machine (S8). As a result, it is possible to make a call with a mobile device having a registered telephone number, and it is possible to block only a call with a mobile device that has not been registered.

  FIG. 11 is a processing flow for registering the mobile device number according to the third embodiment, and FIG. 12 is a processing flow of the control unit of the disturbing device at the time of transmission of the mobile device using the mobile device number. The sequence of the control signal between the base station and the mobile device of the first embodiment shown in FIG. 4 is also applied to the disturbing device of the third embodiment.

  In FIG. 11, first, the disturbing device is set to the registration mode (S1 in FIG. 11), and it is determined whether or not a call setting signal (signal b) via the control channel for outgoing call is received from the mobile station in the specific area where the call is restricted. (S2). When the call setting signal is received, the mobile unit number of the transmitting mobile unit included in the signal is stored in a memory (not shown) in the control unit of the jamming device (S3 in FIG. 11), and is included in the call setting signal. The calling number is displayed on a display device (not shown) of the disturbing device, and confirmation is requested from the user (S4).

  When the user sets the mobile device number to be registered by operating the disturbing device, the processing flow shown in FIG. 12 is executed. The processing flow of FIG. 12 is the same step as the processing flow of the second embodiment (FIG. 10), and the jamming device monitors the uplink and downlink of the control channel (S1 of FIG. 10) and receives the call setup signal. If it is received, it is determined whether the mobile unit number set in the call setting signal matches the mobile unit number registered in FIG. 11 (S3). If they match, the process returns to S1. If they do not match, the process proceeds to S4. Thereafter, the same processes as S4 to S8 in FIG. 10 are performed and executed.

  FIG. 13 is a processing flow of the control unit of the disturbing device at the time of incoming call to the mobile device. In the third embodiment, it is possible to receive an incoming call with only a specific mobile device by the mobile device number. In this processing flow, the sequence of the control signal between the base station and the mobile station of the first embodiment shown in the sequence of the control signal between the mobile station and the jamming device at the time of the incoming call shown in FIG. 7 is applied.

  Also in this case, the mobile unit number that allows call communication is registered in the interfering device in advance by the processing flow shown in FIG. 11, and then the uplink and downlink to the control channel are received (S1 in FIG. 13), and the paging signal ( It is determined whether the signal of the incoming radio status report (c of FIG. 7) from the mobile station for FIG. 7B is received (S2 of FIG. 13), and when received, the mobile station number included in the incoming radio status report signal is registered. It is discriminated whether or not it matches the mobile station number that has been set (S3). If no match is found here, the process returns to S1, and if they match, the reception level of the incoming radio status report signal is determined in the same manner as in S4 in FIG. 8, and the same processing as S5 to S8 in FIG. Executed in ~ S8.

  Also in the case of the third embodiment, only the mobile device having the mobile device number registered in advance is allowed to perform the call communication, but only the mobile device having the mobile device number registered in advance may be changed so as to restrict the call communication.

  In the above embodiment, the configuration is such that only the call is disturbed. However, the step of determining whether or not the voice call is performed such as step 3 in FIG. Can also interfere with. In this case, in this embodiment, the jamming device receives a control signal designating a communication channel transmitted from the base station to the mobile station, and immediately transmits the jamming radio wave to the communication channel (downlink). If the channel is monitored and a signal exceeding a predetermined level is received, the call can be interrupted earlier than the transmission of the jamming wave for the received frequency. The mobile station will switch to the call channel and receive the synchronization signal from the base station, but at least before this downlink synchronization signal is transmitted, it starts transmission of jamming signals before, at the same time or during transmission. As a result, the synchronization processing of the mobile device can be disturbed, and the start of voice communication can be completely prevented.

  Further, when the call setting signal is equal to or higher than a certain value as in step 4 of FIG. 5, the process proceeds to the next step to enable transmission of jamming waves, but this step can be omitted in other embodiments as well. . However, this step is inserted so that the communication (transmission) of a mobile station far from the disturbing device will not be interrupted. If you want to reduce the area of the area where you want to interfere with the communication by the disturbing device. If you want to increase this value and spread it, you should set it smaller. This is also true for the jamming signal transmitted by the jamming device. If the area to be jammed is widened, the transmission power of the jamming radio wave is increased. The setting of the transmission power of jamming radio waves is particularly effective in preventing malfunction of jamming for incoming calls of mobile stations.

  Further, the above-described embodiment is applicable not only to a mobile device but also to a general wireless device in which a communication channel is designated by a wireless signal.

It is a figure which shows the 1st principle structure of this invention. It is a figure which shows the 2nd principle structure of this invention. It is a figure which shows the block configuration of the Example of an obstruction apparatus. It is a figure which shows the sequence of the signal between a base station, a mobile device, and a jamming device when a mobile phone makes a call. It is a figure which shows the processing flow of the control part of the disturbance apparatus of Example 1. FIG. It is a figure which shows the timing chart of a jamming radio wave transmitter. It is a figure which shows the sequence of the control signal between the base station at the time of an incoming call, a mobile device, and a jamming device. It is a figure which shows the processing flow of the control part of the disturbance apparatus at the time of the incoming call of Example 1. FIG. It is a figure which shows the processing flow of registration of the mobile device identification information by Example 2. FIG. It is a figure which shows the processing flow of the control part of the disturbance apparatus at the time of the call origination of Example 2. FIG. It is a figure which shows the processing flow for registering the mobile apparatus number by Example 3. FIG. It is a figure which shows the processing flow of the control part of the disturbance apparatus at the time of the transmission of the mobile station using a mobile station number. It is a figure which shows the processing flow of the control part of the disturbance apparatus at the time of the incoming call to a mobile apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Interfering device 10 Control channel monitoring part 10a Voice communication detection means 10b Reception channel detection means 11 Interference radio wave generation part 2 Mobile device in specific area 2 'Mobile device outside specific area 3 Base station 4 Specific area 5 Service area

Claims (9)

In a mobile phone system comprising a base station and a mobile device that can be wirelessly connected to the base station,
A jamming device is provided in a specific area where the use of a mobile device is desired to be restricted, a control channel monitoring unit is provided in the jamming device, and a jamming radio wave generating unit that outputs the jamming radio wave to the specific area under the control of the monitoring unit,
The control channel monitoring unit monitors a control channel between the mobile station and the base station in the specific area;
A method for restricting communication of a mobile phone, comprising: detecting a signal representing a voice communication call, driving the jamming radio wave generator only in a radio channel for a call to generate jamming radio waves. In claim 1,
The control channel monitoring unit is driven by means for identifying the communication type of the call from the contents of the control channel between the mobile station and the base station, and an output for detecting that the communication type is voice communication. Means for detecting a channel designated for the voice communication,
The mobile telephone communication restriction method, wherein the jamming radio wave generator outputs a jamming radio wave only to the channel detected by the control channel monitoring unit. In claim 1,
The control channel monitoring unit includes means for identifying a call communication type from the content of the control channel between the mobile device and the base station,
When the identification means detects that the voice communication is performed, the jamming radio wave generator generates a jamming radio wave in each frequency band used for voice communication. In any one of Claims 1 thru | or 3,
The base station in the service area including the specific area indicates whether the communication is a voice communication or a data communication in a control channel signal that transmits a paging to be transmitted or a response to the paging of the mobile station when an incoming call is made to the mobile station in the service area. Add identification information,
The method for restricting communication of a mobile phone, wherein the control channel monitoring unit identifies voice communication or data communication from identification information of the control channel. In any one of Claims 1 thru | or 3,
When the control channel monitoring unit detects that the call communication type is voice communication from the content of the control channel between the mobile device and the base station, the control channel monitoring unit stores the identification information of the mobile device,
Then, when a channel designated for voice communication by a control channel from the base station to the mobile device having the stored identification information is detected, a jamming radio wave is transmitted to the detected voice communication channel. Communication restriction method. In a mobile phone system comprising a base station and a mobile device that can be wirelessly connected to the base station,
A jamming device is provided in a specific area where the use of a mobile device is desired to be restricted, a control channel monitoring unit is provided in the jamming device, and a jamming radio wave generating unit that outputs the jamming radio wave to the specific area under the control of the monitoring unit,
Registering in advance the identification information of the mobile device that is allowed voice communication within the specific area in the control channel monitoring unit,
The control channel monitoring unit monitors a control channel between the mobile station and the base station in the specific area, detects a mobile communication identification signal when detecting a signal representing a voice communication call,
It is determined whether the detected identification information of the mobile device and the registered mobile device identification information match, and if they do not match, transmission of jamming radio waves to the downlink channel for voice communication to the mobile device is started, and Then, the cellular phone communication restriction method is characterized in that the generation of jamming radio waves is suppressed. In claim 6,
A telephone number is used as identification information of the mobile device, a telephone number that allows voice communication is registered in the mobile device check unit, and a match between the telephone number included in the call setting information and the registered telephone number is determined. A communication restriction method for a mobile phone, characterized in that: In claim 6,
Using the mobile device number as the mobile device identification information,
When the disturbing device is in the registration mode and the mobile unit number is detected from the control channel signal generated from the mobile unit in the specific area, the mobile unit check unit registers the mobile unit number as a number that permits voice communication. A communication restriction method for a mobile phone. In claim 6,
The control channel monitoring unit detects identification information of the mobile device in the specific area;
The mobile unit check unit determines whether the detected identification information of the mobile unit matches the pre-registered identification information, and suppresses the generation of jamming radio waves if they match, and drives the jamming radio wave generation unit if they do not match And a communication restriction method for a cellular phone, characterized in that an interference wave is generated in a channel for voice communication.

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