JP2002159059A - Portable telephone system and its terminal power supply control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the power supply switch of a portable telephone from being turned on by a mischievous prank or operational error in a restricted area and to enable the power supply switch to be turned on again if necessary in case of an emergency. SOLUTION: An alarm radio set 4 keeps the power supply switch of a portable telephone set 1 in an off state by POW-OFF information report signals when a portable telephone terminal set is located in a power supply off area in a weak electric field. That the power supply of the portable telephone set 1 is kept in an off state is registered in a database 5 by an exchange 6 which connects and controls the portable telephone 1. When the power supply switch of the portable telephone 1 is turned on again, the registration of the off state of the power supply in the database 5 is revoked by a predetermined operation of pushing down a power supply button a few times. The power supply of the portable telephone 1 is turned on when the portable telephone terminal end ascertains that the registration of the off state of the power supply is revoked in the database 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable telephone system, and more particularly to a terminal power control function of a portable telephone system in an area where use of a portable telephone is restricted.

[0002]

2. Description of the Related Art Conventionally, a system that automatically turns off the power of a mobile phone when radio waves emitted from the mobile phone adversely affect medical equipment or the like or when the mobile phone enters an unfavorable place is used. For example, Japanese Patent Application Laid-Open
-298971. The mobile phone that has entered the restricted area notifies the owner of the mobile phone of information that the power is automatically turned off.

[0003]

According to the terminal power control in the above-described conventional mobile phone system, when the mobile phone enters the restricted area, the power of the mobile phone can be automatically turned off automatically. No notification is sent to the caller when there is an incoming call on the mobile phone,
It is an inconvenient situation. After the power is automatically turned off, the power may be turned on accidentally due to an operation mistake or the like. After turning off the power automatically,
If the power needs to be turned on in an emergency, it cannot be turned on again, which is inconvenient.

[0004] A first object of the present invention is to, when power is automatically turned off in a restricted area, notify a caller of the reason why the power is turned off when a call arrives at the portable telephone terminal. Accordingly, it is an object of the present invention to provide a mobile phone system capable of improving services and a terminal power control method thereof.

A second object of the present invention is to prevent the power from being turned on again due to mischief or erroneous operation in the communication restricted area, and to provide operability and convenience that can be used when the power must be turned on again in an emergency or the like. It is an object of the present invention to provide a mobile phone system with high flexibility and a terminal power control method thereof.

[0006]

According to the portable telephone system of the present invention, after the portable telephone terminal is turned off by a control signal in a weak electric field area, the switching center registers the off state in a database. Identify a predetermined power-on operation from the mobile phone terminal via the base station, release the power-off state of the mobile phone terminal already registered in the database, and the mobile phone terminal confirms this registration release confirmation. The configuration is such that the power of the mobile phone terminal is turned on by detecting it.

Further, the portable telephone system of the present invention receives information for turning off the power supply in a weak electric field area, automatically turns off the power supply, and performs a plurality of times within a predetermined time for turning on the power supply again. A mobile phone terminal that requires a predetermined operation of performing a power button operation, a base station that transmits and receives signals via the mobile phone terminal and a wireless line, and a radio wave shield that attenuates an electric field of a radio wave from the base station. A power-off notification radio provided inside the radio wave shield for transmitting information for powering off the mobile phone terminal, and a mobile phone terminal when the mobile phone terminal is located in a power-off area A database for registering a power-off state for each identification number of the mobile phone terminal and the predetermined operation by connecting to the mobile phone terminal and the database via the base station and identifying the predetermined operation. And a switching center for managing control of the source state. The mobile phone terminal checks a radio frequency unit for transmitting and receiving a radio signal, an electric field level of the received radio signal, and information for turning off power in a weak electric field area, and outputs a result to the radio frequency unit. A power-off information check circuit, a first memory unit for storing a code indicating power-off in advance, and comparing a code read from the first memory unit with a code received from the high-frequency unit. A first code matching circuit for transmitting an instruction response signal from the high frequency section to the exchange when both codes match, and a power supply off area when the two codes match in the first code matching circuit. And a voice memory for storing a message for automatically turning off the power and a message for turning on the power again. An audio playback activation control unit that reads a predetermined message from the audio memory unit; a speaker that outputs the message read by the audio reproduction activation control unit; and a timer activation for turning off the power after a predetermined time period Circuit, a second memory unit for storing in advance a code indicating release of the power-off area, and comparing a code read from the second memory unit with a code received from the high-frequency unit. A second code verification circuit that outputs a signal to turn on the power when the codes match, and a power control unit that turns off or restarts the power based on an instruction from the timer start circuit or the second code verification circuit. The mobile phone system according to claim 2, comprising: Further, the switching center is connected to the power-off notification radio and the base station to transmit and receive signals, and a terminal that identifies a signal received by the signal transceiver and performs control corresponding to the identification. A power management unit, a timer for counting a predetermined time period for turning on the power of the mobile phone terminal again, and a register for canceling or registering a power-off state of the mobile phone terminal in the database based on an instruction of the terminal power management unit. A terminal power state registration control unit that performs control, a terminal power state reference unit that refers to the power state of the mobile phone terminal stored in the database, and outputs a message stored in advance based on an instruction from the terminal power state reference unit. And a message storage unit.

[0008] A terminal power control method in a mobile phone system according to the present invention is a terminal power control method in a mobile phone system for controlling power-off and power-on of a mobile phone terminal by a control signal. In the case of, the power of the mobile phone terminal is turned off by the control signal, and this off state is registered in the database for each identification number of the mobile phone terminal by an exchange that controls connection of the mobile phone terminal, When an incoming call to the mobile phone terminal is detected, the calling party is notified by referring to the database by using a voice message stored in advance, which explains why the power of the mobile phone terminal is off.

Further, the terminal power control method for a mobile phone system according to the present invention is a terminal power control method for a mobile phone system in which the power supply of the mobile phone terminal is controlled by a control signal. When the mobile phone is in the service area, the power of the mobile phone is turned off by a control signal, and the off state is registered in the database for each identification number of the mobile phone by the exchange which controls the connection of the mobile phone. When the power of the mobile phone terminal is turned on again, the power off state registered in the database is released by a predetermined operation on the mobile phone terminal, and when the release confirmation in this database is obtained on the mobile phone terminal side, The mobile phone terminal is configured to be turned on, and the operation is performed by a predetermined number of power button operations. Made within a predetermined time, when that was not made within a predetermined time power button operation of a plurality of times a predetermined is configured to continue the power-off state of the mobile phone terminal.

[0010]

Next, embodiments of the present invention will be described with reference to the drawings.

Referring to FIG. 1, there is shown a block diagram of a portable telephone system according to an embodiment of the present invention. In this system, the information to turn off the power in the weak electric field area is received, the power is automatically turned off, and the power button is pressed multiple times within a predetermined time to turn on the power again. A mobile phone 1 required, a base station 2 for transmitting and receiving signals to and from the mobile phone 1 via a wireless line, a radio wave shield 3 for attenuating an electric field of a radio wave from the base station 2, and a radio wave shield 3 inside. POW-OFF notification radio 4 provided for transmitting information for turning off the power of mobile phone 1
And a database 5 for registering a power-off state for each identification number of the mobile phone 1 when the mobile phone 1 is located in the power-off area, and the mobile phone 1 and the database 5 via the base station 2. A switching center 6 which is connected to identify a predetermined operation on the mobile phone 1 and manage and control the power state of the mobile phone 1.

The radio wave shield 3 detects a decrease in the received electric field level when the mobile phone 1 enters the weak electric field area, and intentionally attenuates external radio waves to some extent. Also, POW-
The OFF notification radio 4 receives the POW-OFF information notification signal from the exchange 6 and supplies power (PO) to the mobile phone 1 located in the POW-OFF area (in the radio wave shield).
Information for turning off W) is notified. P
The OW-OFF information notification signal is received by a receiver (not shown) in the POW-OFF notification wireless device, converted into a wireless signal, and transmitted to the mobile phone 1 by POW-OFF information. (Not shown). The transmitting unit converts the information from the receiving unit into a radio signal,
In order to transmit the OW-OFF information, the OW-OFF information is radiated through an indoor antenna into a closed space (inside a radio wave shield).

Referring to FIG. 2, the cellular phone 1 checks the radio frequency section 11 for transmitting and receiving radio signals, the electric field level of the received radio signals and information for turning off the power in the weak electric field area, and as a result, Electric field level / POW-OFF information check circuit 12 that outputs
And a memory unit A13 for storing in advance a code indicating power-off, and a code read from the memory unit A13 and a code received from the high-frequency unit 11, and when both codes match, an instruction from the high-frequency unit 11 is issued. A waveform (code) matching circuit A14 for transmitting a response signal to the exchange, and a display for indicating that the mobile phone 1 is in the power-off area when both codes match in the waveform (code) matching circuit A14. A control unit 15; an audio memory unit 16 for storing a message for automatically turning off the power and a message for turning the power on again; and an audio reproduction start control for reading a predetermined message from the audio memory unit 16. Unit 17, a speaker 18 for outputting a message read out by the audio reproduction start control unit 17, and a tag for turning off the power after a predetermined time period. A start circuit 19, a memory unit B20 for storing in advance a code indicating release of the power-off area, and a code read from the memory unit B20 and a code received from the high frequency unit 11 are compared. A waveform (sign) matching circuit B21 for outputting a signal for turning on the power again when they match, a power control unit 22 for turning off or on the power based on an instruction from the timer starting circuit 19 or the waveform (sign) matching circuit B21; Is provided.

The portable telephone 1 has a function of periodically checking the presence / absence of information notified from the POW-OFF notification radio 4 and a POW-O stored in its own memory in advance.
The FF information is compared and collated. If the collation results in a match, information indicating that the POW-OFF area is present and information including the subscriber ID information of the subscriber are transmitted to the base station 2. Then, the data is transmitted to the database 5 via the exchange 6 and the power is turned off after the transmission. In addition, it receives and displays the display information on the mobile phone 1 transmitted from the exchange 6, and also receives the audio reproduction information transmitted from the exchange 6 and reproduces the previously stored audio.

When the operator of the mobile phone 1 manually turns on the power of the mobile phone 1 while the power of the mobile phone 1 is turned off, a POW-ON request is transmitted to the exchange 6 and continuously. Each time the power ON button is manually pressed, a POW-ON request is transmitted to the exchange 6 each time. In response to the POW-ON request, a POW-ON request response including information indicating cancellation of the POW-OFF area presence area is received, and the received POW-OFF area presence area cancellation presence / absence is determined. When the presence of the POW-OFF area is canceled, the POW-ON of the mobile phone 1 is enabled. On the contrary, when the presence of the POW-OFF area is not canceled, the POW-OFF is released from the mobile phone 1 to the operator. Reproduce voice such as voice guidance for prompting operation.

Referring to FIG. 3, the switching center 6 transmits a POW-
A signal transmitting / receiving unit 61 connected to the OFF notification radio device and the base station for transmitting / receiving a signal, a terminal power management unit 62 for identifying a signal received by the signal transmitting / receiving unit 61 and performing control corresponding to the identification; A timer 63 for counting a predetermined time period for turning on the power again, and a terminal power state registration control for registering or canceling the power-off state of the mobile phone 1 in the database 5 based on an instruction from the terminal power management unit 62 Section 64 and a terminal power state reference section 65 for referring to the power state of the mobile phone 1 stored in the database 5
And a message stored in advance in the terminal power state reference unit 65.
And a message storage unit 66 for outputting based on the instruction.

The exchange 6 receives information indicating that the mobile station 1 has entered the POW-OFF area obtained via the base station 2 from the mobile phone 1 and turns off the power of the mobile phone 1 itself. Of POW-O
The notification information necessary for constantly notifying the POW-OFF information is transmitted to the FF notification wireless device 4. As a response to the information transmission for turning off the power of the mobile phone 1, information including the POW-OFF area resident information and the subscriber ID information of the subscriber is received from the mobile phone 1 via the base station. In order to register the received POW-OFF area presence information and the subscriber ID information of the subscriber in the database 5, the POW-OFF area presence registration information is transmitted to the database 5.
After the subscriber ID and the POW-OFF area location information are registered in the database 5, if there is an incoming call from another network (another exchange) to the subscriber, the subscriber ID is used as an index to carry the subscriber. A status inquiry is made to the database 5 to know the power status of the telephone 1.

As a response from the database 5 to the status inquiry, the response information is received, and when the response information includes the information in the POW-OFF area, the voice information or the like is transmitted to the other exchanges based on the information. Notifies that the subscriber is in the POW-OFF area.
When the operator of the mobile phone 1 manually turns on the power of the mobile phone, the timer is started at the same time as receiving the POW-ON request from the mobile phone 1 via the base station 2. The PO transmitted from the mobile phone 1 when the operator of the mobile phone 1 manually presses the power ON button three times, for example, continuously within the timer activation time.
When a W-ON request is received three consecutive times, the power status of the mobile phone 1 corresponding to the subscriber ID of the subscriber registered in the database 5 is changed from the POW-OFF area to the POW-OFF area. Change to the state of being cancelled. Then, the POW-O registered in the database 5 is turned on so that the power of the mobile phone 1 can be turned on.
A POW-ON request for rewriting the registration information from the state where the FF area is located to the state where the POW-OFF area is canceled is transmitted to the database 5.

After registering the power state (release of POW-OFF area presence) of the mobile phone 1 corresponding to the subscriber ID in the database 5, a POW-ON request including POW-OFF area presence release information is returned as a response. Receive a response. Further, this POW-ON request response is transmitted to the mobile phone 1 via the base station. Conversely, the mobile phone 1
When the operator manually turns on the power of the mobile phone 1,
POW-ON from the mobile phone 1 via the base station
Start the timer upon receiving the request. When the operator of the mobile phone 1 does not manually press the power ON button three times consecutively within the timer activation time,
If the POW-ON request transmitted from the mobile phone 1 is not received three consecutive times within the timer activation time,
When the timer start-up time expires (time-out), P
POW- which does not include information on cancellation of OW-OFF area location
An ON request response is transmitted to the mobile phone 1 via the base station 2. The base station 2 is connected to the exchange 6
And POW-ON request information transmitted from the exchange 6 to the mobile phone 1
-Relay ON request response information.

The database 5 receives the subscriber ID information and the POW-OFF area location registration information including the POW-OFF area location information transmitted from the exchange 6, and receives the received subscriber ID and POW-ID. The information in the OFF area is registered as data. When an incoming call is received from the other exchange to the subscriber, a status inquiry transmitted from the exchange 6 to know the power status of the mobile phone 1 of the subscriber is received using the subscriber ID as an index. ,
Using the subscriber ID included in this status inquiry as an index, the power status of the mobile phone 1 corresponding to the previously registered subscriber ID is read from the database 5.

The power status of the mobile phone 1 (within the POW-OFF area) read from the database 5 is transmitted to the exchange 6 as a response to the status inquiry as P
The OW-OFF area in-area information is added and transmitted. Also, the power state of the mobile phone 1 corresponding to the subscriber ID of the subscriber registered in the database 5 is set to POW-O.
The POW registered in the database 5 is changed from the area where the FF area is located to the state where the POW-OFF area is canceled and the power of the mobile phone 1 can be turned on.
-Receives the POW-ON request transmitted from the exchange 6 to rewrite the registration information to the state where the OFF area is released. After rewriting the data to the state of the cancellation of the POW-OFF area, a POW-ON request response is returned to the exchange 6 as a response to the POW-ON request.

The operation of the embodiment of the present invention will be described below in detail with reference to FIGS. Here, it is assumed that the mobile phone 1 is in a power-on state. The mobile phone 1 periodically checks whether there is POW-OFF information notified from the POW-OFF notification wireless device 4 while the power is on. When the mobile phone 1 is located in the radio wave shield 3 shown in FIG. 1 (has a weak electric field area), it detects a decrease in the received electric field level and notifies the POW-OFF installed in the radio wave shield 3. When the POW-OFF information constantly transmitted from the wireless device 4 is received, the information reception status is checked by the electric field level / POW-OFF information check circuit 12 shown in FIG. When the weak electric field area is located, a report 1 (including received electric field level reduction information, POW-OFF information, and a subscriber ID) is transmitted to the exchange 6 via the base station 2 indicating that the radio wave has weakened.

The exchange 6 has a POW-OFF notification radio 4
POW to turn off the power of the mobile phone 1
-Send an OFF information notification signal. The exchange 6 receives a signal (report 1 shown in FIG. 4) including the received electric field level reduction information, the POW-OFF information, and the subscriber ID information from the mobile phone 1 via the base station 2. The exchange 6
Based on the declaration 1 signal, it is determined that the mobile phone 1 holding the subscriber ID wants to turn off the power, and the mobile phone 1 holding the subscriber ID is transmitted to the mobile phone 1 via the base station 2. A POW-OFF instruction (instruction 1 shown in FIG. 4) for power-off control including display information on the display and audio reproduction information is transmitted.

The display information included in the instruction 1 shown in FIG.
Based on the instruction 1 signal received by the mobile phone 1 from the exchange 6, after the waveform matching result is matched, the mobile phone 1
Until the mobile phone 1 is turned off, it is used to display on the display of the mobile phone 1 that the power of the mobile phone 1 will be turned off soon.

The mobile phone 1 receives the instruction 1 returned from the exchange 6. The mobile phone 1 receives the POW-
The waveform (sign) of the radio wave as the OFF instruction (instruction 1) and the waveform (sign) previously stored in the memory unit A13 shown in FIG.
Are compared and compared.
A response to the instruction 1 (instruction 1 response) is returned to the exchange 6 via the base station 2. The response to the instruction 1 includes the subscriber ID and the information on the presence of the POW-OFF area. The mobile phone 1 uses the display information received in the instruction 1 to display a message on the display of the mobile phone 1 by the display control unit 15 shown in FIG. In addition, the mobile phone 1 stores voice in advance to notify by voice that the power of the mobile phone 1 is automatically turned off by using the voice reproduction information also received in the instruction 1.
The audio playback unit 17 reads out from the audio memory unit 16 shown in FIG.
A timer (not shown) for performing the F control is activated by the timer activation circuit 19. After the timer in the mobile phone 1 expires after the timer is started, the power of the mobile phone itself is turned off by a signal from the timer starting circuit 19 to the power control unit 22.

On the other hand, in the exchange 6, based on the POW-OFF instruction (instruction 1 shown in FIG. 4) transmitted from the exchange 6 to the portable telephone 1 for power-off control, a result notification signal after matching the waveform collation result. (Response to the instruction 1 shown in FIG. 5) from the mobile phone 1 and the POW to the POW-OFF notification radio 4
-Complete all other communication control except the OFF information notification signal.

The switching center 6 determines that the portable telephone 1 is a POW-
In order to register in the database 5 that the user is in the OFF area, the information (PO) previously received in response to the instruction 1 in FIG.
The POW-OFF area presence registration shown in FIG. 5 is transmitted to the database 5 with the W-OFF area presence information and the subscriber ID information added. The exchange 6 transmits a state inquiry shown in FIG. 5 to the database 5 to inquire about the state of the power supply of the portable telephone 1 when there is an incoming call to the portable telephone 1 from another exchange.

The exchange 6 receives a response from the database 5 as a result of the status inquiry. This response includes the POW-OFF area in-service information, which is the power state of the mobile phone 1 previously registered in the database 5. After receiving this response, the exchange 6 notifies the other exchanges by voice or the like that the subscriber is in the POW-OFF area.

The switching center 6 obtains via the base station 2 when the power is turned on manually from the mobile phone 1 as shown in FIG.
Is received. This POW-ON
The request includes the subscriber ID. The exchange 6 receives the POW-ON request from the mobile phone 1 and activates the timer at the same time. The switching center 6 allows the operator of the mobile phone 1 to continuously operate for 3 seconds within the timer activation time (for example, 10 seconds).
By manually pressing the power ON button twice, the POW-ON request transmitted from the mobile phone 1 is continuously
If the POW-OFF area is registered in the database 5 and the POW-OFF area is present,
FIG. 6 for rewriting the registration information to the state where the area is canceled
Is transmitted to the database 5.

The exchange 6 transmits the POW-
After rewriting the data to the OFF area cancellation, a POW-ON request response shown in FIG. This POW-ON request response includes POW-OFF area presence release information indicating the power state of the mobile phone 1. The exchange 6 returns a POW-ON request response shown in FIG. 6 to the mobile phone 1 via the base station 2. This POW-ON request response includes POW-OFF area location release information corresponding to the subscriber ID.

In addition, the switching center 6 operates within the timer activation time (1
If the POW-ON request from the mobile phone 1 is not received three times in a row at 0 seconds), the POW-ON request response shown in FIG. Is returned to the mobile phone 1 via. This POW-ON request response does not include the POW-OFF area presence release information corresponding to the subscriber ID.

In the portable telephone 1, the received POW-ON
The waveform (code) of the radio wave for canceling the presence of the POW-OFF area included in the request response is compared with the waveform (code) stored in advance in the memory unit B20 shown in FIG. If so, the signal from the waveform (sign) collating circuit B21 to the power supply control unit 22 causes the mobile phone 1 to turn itself on. Conversely, if the result of the comparison and collation does not match, for example, if the information included in the received POW-ON request response is not the release of the POW-OFF area, the sound reproduction from the waveform (code) collation circuit B20 is performed. In response to a signal to the activation control unit 17, in order to notify the power-on operation operator manually of the POW-OFF by voice or beeper, a voice is stored in the voice memory unit 16 in which voice is stored in advance. It performs readout and audio playback control.

In this embodiment, the case where the power button is continuously pressed three times when the power of the mobile phone 1 is turned on again is exemplified. However, the number of times is not necessarily limited to three, and a predetermined number of times may be set in advance. You only have to decide.

According to the present invention, the mobile phone itself controls the power supply to be turned off and on again in response to an instruction from the exchange 6 triggered by a report from the mobile phone 1, so that other electronic devices can be more reliably controlled. Since adverse effects on operation can be prevented beforehand, it is also effective at hospitals, airport gates, and the like. In the case where there is an electric field capable of communication in the restricted area, the power of the mobile phone can be intentionally turned on and used in the event of an emergency, so that the usability is improved.

[0035]

As described above, according to the present invention, when the power is automatically turned off in the restricted area, when the mobile phone terminal receives an incoming call, why is the power supply turned off to the caller? The service can be further improved by notifying whether or not the service is available. In addition, the power supply is prevented from being turned on again due to mischief or erroneous operation in the restricted area of the mobile phone terminal, and when the power supply needs to be turned on in an emergency or the like, the power can be turned on by a predetermined operation. Can be improved.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a mobile phone system according to an embodiment of the present invention.

FIG. 2 is a diagram showing an internal configuration of the mobile phone in FIG. 1;

FIG. 3 is a diagram showing an internal configuration of the exchange in FIG. 1 according to the present invention.

FIG. 4 is a sequence diagram for explaining the operation of the exemplary embodiment of the present invention.

FIG. 5 is a sequence diagram for explaining the operation of the exemplary embodiment of the present invention.

FIG. 6 is a diagram showing an embodiment of the present invention, in which a switching center determines a predetermined POW.
FIG. 10 is a sequence diagram for explaining an operation when an ON request can be received.

FIG. 7 is a diagram showing an embodiment of the present invention, in which a switching center determines a predetermined POW.
FIG. 9 is a sequence diagram for explaining an operation when an ON request cannot be received.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 mobile phone 2 base station 3 radio wave shield 4 POW-OFF notification radio 5 database 6 exchange 11 high frequency unit 12 electric field level / POW-OFF information check circuit 13 memory unit A 14 waveform (code) collation circuit A 15 display control Unit 16 sound memory unit 17 sound reproduction start control unit 18 speaker 19 timer start circuit 20 memory unit B 21 waveform (sign) matching circuit B 22 power control unit 61 signal transmission / reception unit 62 terminal power management unit 63 timer 64 terminal power state registration control Section 65 Terminal power status reference section 66 Message storage section

Claims (8)

[Claims] 1. A mobile phone terminal is turned off by a control signal in a weak electric field area, and after a switching station registers this power-off state in a database, the mobile phone terminal receives a predetermined signal from the mobile phone terminal via a base station. Power cycle operation of
A mobile phone characterized by releasing the power-off state of the mobile phone terminal already registered in the database, and turning on the power of the mobile phone terminal by detecting the registration cancellation confirmation by the mobile phone terminal. Phone system. 2. A predetermined operation of receiving information for turning off the power supply in a weak electric field area, automatically turning off the power supply, and performing a plurality of power button operations within a predetermined time for turning on the power again. A mobile phone terminal that requires, a base station that transmits and receives signals via the mobile phone terminal and a wireless line,
A radio wave shield for attenuating an electric field of a radio wave from the base station; a power-off notification radio device provided inside the radio wave shield for transmitting information for turning off the power of the mobile phone terminal; A database for registering a power-off state for each identification number of the mobile phone terminal when the terminal is located in the power-off area, and a connection to the mobile phone terminal and the database via the base station and the predetermined And a switching center that identifies the operation of the mobile phone terminal and controls and controls the power state of the mobile phone terminal. 3. The mobile phone terminal checks a radio frequency unit for transmitting and receiving a radio signal, an electric field level of the received radio signal and information for turning off a power supply in a weak electric field area, and compares the result with the radio frequency unit. An electric field level / power-off information check circuit to be output to the first memory unit for storing in advance a code indicating power-off, a code read from the first memory unit, and a code received from the high-frequency unit. And a first code matching circuit for transmitting an instruction response signal from the high frequency section to the exchange when the two codes match with each other, and a mobile phone when the two codes match in the first code matching circuit. To store a display control unit for displaying that the terminal is in the power-off area, and a message for automatically turning off the power and a message for turning on the power again. An audio memory unit, an audio reproduction start control unit that reads a predetermined message from the audio memory unit, a speaker that outputs the message read by the audio reproduction start control unit, and a power supply that is turned off after a predetermined time period A timer starting circuit, a second memory unit for preliminarily storing a code indicating release of the power-off area, a code read from the second memory unit, and a code received from the high-frequency unit. Are compared, and when the two codes match, a second code verification circuit that outputs a signal to restart the power supply, and power-off or power-on based on an instruction from the timer activation circuit or the second code verification circuit The mobile phone system according to claim 2, further comprising a power control unit. 4. The switching center is connected to the power-off notification radio and the base station to transmit and receive a signal, and identifies a signal received by the signal transmitting and receiving unit, and performs control corresponding to the identification. Terminal power management unit, a timer for counting a predetermined time period for turning on the power of the mobile phone terminal, and registering or canceling the power off state of the mobile phone terminal in the database based on an instruction of the terminal power management unit. A terminal power state registration control unit that performs control for performing the control, a terminal power state reference unit that refers to the power state of the mobile phone terminal stored in the database, and an instruction of the terminal power state reference unit that stores a message stored in advance. 3. The mobile phone system according to claim 2, further comprising: a message storage unit that outputs the message based on the message. 5. A terminal power control method in a mobile phone system for controlling power-off and power-on of a mobile phone terminal by a control signal, wherein the power of the mobile phone terminal is controlled by the control signal when the mobile phone terminal is in a power-off area. The mobile phone terminal is turned off, and the off state is registered in the database for each identification number of the mobile phone terminal by an exchange that controls connection of the mobile phone terminal, and an incoming call to the mobile phone terminal is detected. A terminal power control method for a mobile phone system, comprising: notifying a caller of a reason why the power of the mobile phone terminal is turned off by referring to the database by a voice message stored in advance. 6. A terminal power control method in a mobile phone system for controlling power-off and power-on of a mobile phone terminal by a control signal, wherein the power of the mobile phone terminal is controlled by the control signal when the mobile phone terminal is in a power-off area. The mobile telephone terminal is registered in the database by the exchange that controls the connection of the mobile telephone terminal for each of the identification numbers of the mobile telephone terminal. The mobile phone terminal is released by a predetermined operation on the mobile phone terminal, and the mobile phone terminal is turned on when the release confirmation in this database is obtained on the mobile phone terminal side. Terminal power control method in a mobile phone system. 7. The terminal power control method for a mobile phone system according to claim 6, wherein the operation is that a predetermined number of power button operations are performed within a predetermined time. 8. The terminal according to claim 6, wherein the power-off state of the mobile telephone terminal is continued when a predetermined number of power button operations are not performed within a predetermined time. Power control method.