JP2001224073A - Mobile terminal station and access restriction method for mobile terminal station - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable communication resources to be effectively utilized in emergency. SOLUTION: When an emergency control center 21 transmits access restriction in a wireless zone A on the occurrence of an emergency, a base station 10 informs portable hones 101-10n about communication restriction. The portable phones 101-10n receiving the information carries out communication restriction, turn off the main power supply and inhibit transmission when a prescribed time or over is not lapsed from the preceding transmission in a time zone where the transmission is permitted. Thus, occupancy of a channel by a specific portable phone can be prevented so as to efficiently distribute the communication resource to the portable phones 101-10n.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an access control method capable of restricting access of a mobile terminal station and a mobile terminal station.

[0002]

2. Description of the Related Art Automobile telephone systems and PDCs (Personal Digital Cellular telecommunications) which are known as analog cellular systems and digital cellular systems.
wireless telephone system such as a personal handyphone system (PHS).
In m), a base station and a plurality of mobile terminal stations perform communication via a time-division multiplexed (TDMA) wireless line. The base station is assigned a band of a unique frequency that does not cause interference with an adjacent base station, and a line composed of this band is subjected to a plurality of time division multiplexing (TDMA).
A plurality of telephone terminal stations and a base station can communicate with each other through the established line.

In such a cellular system, a zone system is generally adopted, and a number of wireless zones are arranged in a service area. It is the base station that performs communication control in each wireless zone. When a mobile phone as a mobile station talks with a general telephone, the base station controls communication in the wireless zone to which the mobile phone belongs. To the exchange, and from the exchange to the general telephone network. As a result, the mobile telephone can communicate with another telephone by being connected to a base station that controls communication in each wireless zone via a wireless line. In this case, one of the uplink channels is allocated for transmission from the mobile phone and received by the base station, and one of the downlink channels is allocated for transmission from the base station and reception by the mobile phone. Thus, bidirectional communication can be performed by allocating a pair of channels, an up channel and a down channel.

[0004]

When a large earthquake or the like occurs and a wired line is seriously damaged, it is necessary to secure a wireless line such as a wireless telephone system or a PHS. In many cases, many mobile terminal stations using a wireless line request communication at the same time, and the traffic tends to be congested. In other words, there is a possibility that a call far exceeding the number of wireless channels allocated to the wireless zone may be generated, so that it is difficult to secure a line for emergency communication. Furthermore, when the base station controlling the communication in the wireless zone cannot handle the call, the wireless line goes down. Conventionally, in order to solve this, Japanese Patent Application Laid-Open No. 8-31
As proposed in U.S. Pat. No. 7,471, a regulation method for regulating access of a mobile terminal station is known. According to this restriction method, when restricting access, mobile terminal stations are divided into groups so that transmission can be made only to a group whose non-restriction time has been reached. However, it is possible to make an emergency communication call even if access is restricted.

[0005] In such a regulation method, a call is not generated except for a mobile terminal station whose non-regulation time has been reached.
A line for emergency communication will be sufficiently secured. However, when communication is connected after waiting for the non-regulation time, the communication tends to be continued for a long time, so that there is a problem that the line is not so much free even though the access is regulated. . That is, communication resources are not efficiently distributed. Therefore, an object of the present invention is to provide an access control method and a mobile terminal station that can effectively use communication resources without hindering emergency communication.

[0006]

In order to achieve the above object, an access control method according to the present invention, when restricting the access of a mobile terminal station, comprises the steps of: Using a broadcast channel to transmit communication restriction information to the mobile terminal station, the mobile terminal station that has received the communication restriction information performs communication restriction processing, and when the access of the mobile terminal station is not restricted The mobile terminal station performs normal incoming call processing and outgoing call processing. In the communication restriction processing, the main power is turned off and, during a time zone in which the outgoing call is permitted, a predetermined time has elapsed since the last outgoing call. When a calling operation is detected after the lapse of the above, the main power is turned on, and a calling process based on the calling operation is performed.

In the above access control method of the present invention, when the transmission time of the communication connected by the transmission processing performed during the communication restriction processing exceeds a predetermined time, the communication is forcibly terminated. You may make it. Further, in the access control method of the present invention, when the main power supply of the mobile terminal station is turned off and a call operation to a connection destination that is preferentially connected is detected, the main power supply is switched off. It may be turned on to perform a calling process based on the calling operation.

A mobile terminal station according to the present invention capable of achieving the above object has a transmitting / receiving unit, a key unit provided with keys for performing a call operation, dialing, and the like, and an operation of the transmitting / receiving unit and the key unit. A control unit for controlling the mobile terminal station, the communication control information for restricting the access of the mobile terminal station through a broadcast channel from a base station that manages the communication of the mobile terminal station is received by the transmitting and receiving unit. When the control unit detects that the transmission is off, the control unit turns off the power supply to the parts other than the key unit and the control unit. When a calling operation is detected after a lapse of time or more, the power supply is turned on, and a calling process based on the calling operation is performed.

Further, in the mobile terminal station of the present invention,
When the transmission time of the connected communication by performing the transmission process exceeds a predetermined time, the control unit may forcibly terminate the communication. Further, in the mobile terminal station of the present invention, when power supply to parts other than the key unit and the control unit is turned off, a call operation to a connection destination to which the control unit is preferentially connected is performed. When the call is detected, the power supply may be turned on to perform a calling process based on the calling operation.

[0010] According to the present invention, when access of the mobile terminal station is restricted, the mobile terminal station can make a call only in a time zone allocated to secure a line for emergency communication. To be. Further, only when a predetermined time or more has elapsed since the last transmission in the time zone in which the transmission is permitted, communication to a destination other than the emergency destination is enabled. As described above, since transmission is prohibited unless a predetermined time has elapsed since the last transmission, communication resources can be distributed to many mobile terminal stations.

Further, in the event of a disaster or the like, when communication is connected during a time period in which calling is permitted, communication tends to continue for a long time. When the transmission time of the communication exceeds the time limit, the communication is forcibly terminated. As a result, the time occupied by one call can be shortened, so that an opportunity to make a call to a large number of mobile terminal stations in a time zone in which the call is permitted is provided. Furthermore, when the access of the mobile terminal station is regulated, the main power is turned off,
This eliminates the need for location registration or the like that the mobile terminal station accesses at random, thereby alleviating traffic congestion. In addition, the battery of the mobile terminal station can be prevented from being consumed, which is effective as a means for securing communication of the mobile terminal station for a long time in the event of a disaster or the like in which a power outage may occur.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An outline of a mobile communication system is shown in FIG. 1, and an embodiment of an access control method according to the present invention will be described below with reference to FIG. The mobile communication system shown in FIG. 1 is a cellular communication system (PDC: Personal Digital Cellu) which is a mobile communication system in Japan.
As in the case of lar telecommunication systems), a zone system is adopted and a number of wireless zones are arranged in a service area. The communication control in each wireless zone is performed by the base station. For example, the communication control in the wireless zone A shown in FIG. That is, when the mobile phones 101 to 10n, which are mobile terminal stations belonging to the wireless zone A, communicate with other mobile phones or general telephones, the base station that performs communication control of the wireless zone A to which the mobile phones 101 to 10n belong. The mobile switching center 1 is connected to the mobile switching center 1 via the office 10, and is connected from the mobile switching center 1 to the general telephone network in the public exchange 2. in this way,
The mobile phones 101 to 10n can communicate with other telephones by being connected via a wireless line to the base station 10 that controls communication of the wireless zone to which the mobile phones belong.

In the example shown in FIG.
n of the mobile phones 1 belong to the wireless zone A,
Since 01 to 10n are each movable, when they move from the wireless zone A to outside the zone, they belong to the adjacent wireless zone. Further, in the illustrated example, base stations 11 and 12 are shown in addition to the base station 10, and communication control of adjacent wireless zones is performed by the base stations 10 and 11, respectively. These base stations 10 to 12 are connected to the mobile switching center 1. The communication control of the mobile phones 101 to 10n belonging to the wireless zone A is performed by the base station 10, and the description when the mobile phones 101 to 10n communicate with the mobile phones and general phones belonging to other wireless zones will be described below. Do.

In a mobile communication system, logical channels of an information channel and a control channel are prepared for communication and radio channel control. The information channel is for the mobile phone to transmit user information such as voice, and when assigned to a specific mobile phone, is occupied by the mobile phone until the communication ends. The control channel is a channel for transmitting a control signal required for connection control, and is a broadcast channel (BCCH) which is a one-way channel only for downlink for transmitting information to be broadcast to all mobile phones in the wireless zone. : Broadc
common control channel (CCCH: asting control channel announce), notification of incoming calls to a mobile phone, notification of location registration and call request randomly issued from the mobile phone.
It consists of channels such as Common Control CHannel).

For example, the mobile phone 101 belongs to the wireless zone A by performing location registration with the base station 10 using the common control channel (CCCH). When the mobile telephone 101 communicates with the general telephone 22 of the general telephone network, the mobile telephone 101 transmits a call signal including the telephone number information of the destination telephone 22 to the common control channel (C).
(CCH) to the base station 10. Base station 10
Receives the call signal, the call signal is sent to the public exchange 2 via the mobile exchange 1 because the destination is the general telephone set 22. Then, the public exchange 2 sends an incoming signal to the other party's general telephone 22 to connect the line between the general telephone 22 and the mobile telephone 101. An idle channel of the information channel in the wireless zone A is allocated to the mobile phone 101 by the base station 10, whereby the mobile phone 101 and the general telephone 2 are assigned.
2 can communicate.

When the mobile telephone 101 receives a call from another telephone, the base station 10 sends an incoming signal to the mobile telephone 101 through a common control channel (CCCH). When you operate the incoming call button when you know that you have received a call,
The base station 10 allocates an empty channel of the information channel in the wireless zone A to the mobile phone 101 so that the mobile phone 101 can communicate with another telephone. In such a mobile communication system, the mobile terminal station access restriction method of the present invention is executed. For example, when a large-scale earthquake or the like occurs, the mobile phones 101 to 101 in the wireless zone A
When the disaster management center 21 determines that it is necessary to regulate the access of 10n and secure a necessary line, the disaster management center 21 communicates with the mobile phones 101 to 10n in the wireless zone A through the broadcast channel (BCCH) of the base station 10. Disseminate regulatory information. As a result, access to the mobile phones 101 to 10n is restricted.

When the portable telephones 101 to 10n receive the communication restriction information, the main power is turned off so that access is restricted in the portable telephones 101 to 10n, and a key comprising various keys including a control unit and a dial button is provided. The operation is stopped except for the unit and the timer. When the access restriction is performed, the mobile phones 101 to 101
10n are grouped with reference to numbers such as the end of the telephone number, and a time zone in which calling is permitted is provided for each group. Each of the mobile phones 101 to 10n determines whether or not the time zone in which the transmission is permitted has been reached by a timer provided in the mobile phone. The information on the transmission permitted time zone is included in the communication restriction information. That is, the main power supply is turned off except for the time period during which the transmission is permitted, and
Battery consumption at 10n can be prevented. In addition, when the access is restricted, it is considered that a power failure has occurred. Thus, by minimizing the consumption of the battery as described above, it is possible to secure a long wireless line.

In addition, transmission is not performed freely even in the transmission-permitted time zone, but transmission is permitted under certain restrictions so that communication resources can be used effectively. The first constraint is whether a predetermined time has elapsed since the last transmission. If the specified time has not elapsed,
Transmission is prohibited even during the time period in which transmission is permitted. The second restriction is that the communication is forcibly terminated when the transmission time exceeds the time limit while the transmission is being performed and the communication is continued. As described above, the call is restricted as described in the first and second cases even in the time zone in which the call is permitted. Will be given. That is, communication resources are efficiently allocated. Also, as the time zone in which the call is permitted, the call may be permitted only during the time when the least significant digit of the telephone number of the mobile phone 101 to 10n matches the least significant digit of the timer time. Good. Note that the main power supply is turned off during a period other than the time period during which calling is permitted, so that it becomes impossible to receive an incoming call.
Therefore, when there is an incoming call in a time zone other than the time zone in which calling is permitted, the base station 10 is notified that the call cannot be received.

Next, FIG. 2 shows a hardware configuration of a mobile terminal station of the present invention capable of executing the access control method according to the present invention. Hereinafter, the mobile terminal station will be described as a mobile phone. The mobile phone shown in FIG.
And a retractable antenna 40 that is stored during standby and extended during communication. The antenna 40 is the antenna 4
0 is connected to a duplexer 41 that is shared by the transmission unit 44 and the reception unit 42. The transmission signal from the transmission unit 44 is supplied to the antenna 40 by the duplexer 41, and the reception signal of the antenna 40 is transmitted to the reception unit 42. Will be supplied. The received signal is frequency-converted by the receiving unit 42, demodulated into a baseband signal, and supplied to the baseband signal processing unit 46. The baseband signal processing unit 46 decodes the high-efficiency compression-encoded audio signal into an original audio signal and transmits the original audio signal from the receiver 47.

On the other hand, the audio signal input from the transmitter 48 is subjected to high-efficiency compression encoding in the baseband signal processing section 46 and supplied to the transmission section 44. And the transmitting unit 4
After being modulated in 4, the frequency is converted to a transmission frequency band and transmitted from the antenna 40 via the duplexer 41. Note that a local oscillation signal for frequency conversion is supplied from the PLL circuit 43 to the receiving unit 42 and the transmitting unit 44. The operations of the transmitting / receiving unit 45 and the baseband signal processing unit 46 including the receiving unit 42 and the transmitting unit 44 are controlled by the control unit 49. The control unit 49 supplies a display signal to a display unit for displaying various information in the display unit / key unit 50, and controls a key unit including a transmission button, an end button, a dial key, and the like in the display unit / key unit 50. Scanning is performed by the key scanning unit 49a, and information from the operated key is taken in. Further, the control unit 49 is supplied with time information from a timer 51 that counts time.

Furthermore, a baseband signal processing section 46
The baseband signal of the broadcast channel (CCCH) decoded in is also supplied to the control unit 49, and when the communication restriction information is notified on the broadcast channel, the control unit 49 detects the communication restriction information. When the communication restriction information is detected by the control unit 49, a communication restriction process described later for restricting access based on the communication restriction information is executed.
In addition, when the communication restriction information is not received and when the communication restriction release signal is received, the control unit 49 executes the normal processing described later in which the normal transmission processing and the reception processing are performed. The control unit 49 includes a central processing unit (CPU), a ROM (Read Only Memory) storing a communication restriction processing program, a normal processing program, and the like.
M (Random Access Memory).

Next, FIG. 3 shows a flowchart of a start process executed under the control of the control unit 49 when the power switch of the mobile phone as the mobile terminal station according to the present invention is turned on. When the power switch is turned on to start the start process, a broadcast channel (BCCH) is received (step S10), and it is determined in step S11 whether communication restriction information has been received through the broadcast channel. Here, if the communication restriction information is not received,
Proceeding to step S13, normal processing, which will be described later, for performing normal transmission processing and reception processing, is performed. If the communication restriction information has been received, the process proceeds to step S12, where a communication restriction process described later for restricting access is performed.

FIG. 4 shows a flowchart of the normal processing executed in step S13. When normal processing starts,
In step S20, location registration is performed using the uplink channel of the common control channel (CCCH). Here, assuming that the mobile phone whose power switch is turned on is the mobile phone 101, the mobile phone 101 comes to belong to the wireless zone A by performing position registration with the base station 10. Next, a common control channel (CCCH) is received and it is detected in step S21 whether there is an incoming call to the own station. Here, if an incoming call to the own station is detected, step S
The process proceeds to step S22, where the incoming call processing is performed. When the incoming call button is operated, the telephone is connected to the other party's telephone and communication is performed. If no incoming call to the own station is detected, the process proceeds to step S23 to determine whether or not a calling operation has been performed.
Here, if the key section of the display section / key section 50 is operated to dial the telephone number of the other party and operate the transmission button, it is determined that the calling operation has been performed, and the transmission processing is performed in step S24. In this transmission processing, a transmission signal is transmitted to the base station through the uplink channel of the common control channel (CCCH). The base station performs processing for connecting to the other party, and when the other party responds, the line is connected and communication becomes possible.

When the outgoing call processing is completed and when the incoming call processing is completed, a communication state is established.
At 25, it is determined whether or not the end button has been operated to end the communication. This process is repeated until it is determined that the communication has been terminated. If it is determined that the end button has been operated, the communication is terminated and the process proceeds to step S26. Step S
At 26, it is determined whether the broadcast channel (BCCH) has been received and the communication restriction information has been received. If received, the communication restriction processing of step S12 shown in FIG. 3 is performed.
If not received, return to step S21 and step S2
The processing from 1 to step S26 is repeatedly executed. If no calling operation is detected in step S23, the process jumps to step S26 and the above-described processing is performed.

Next, FIG. 5 shows a flowchart of the communication restriction processing executed in step S12 of the start processing. When the communication restriction process is started, the main power supply is turned off by the control unit 49, and the supply of power to transmission / reception units such as the transmission / reception unit 45 and the baseband signal processing unit 46 is stopped. Next, it is determined in step S32 whether or not the calling operation has been performed.
Is determined. Here, if it is assumed that the key section of the display section / key section 50 is operated to dial the telephone number of the other party and the call button is operated, the key scanning means of the control section 49 to which power is supplied also at this time. 49a scans the key section of the display / key section 50 to determine that a calling operation has been performed, and proceeds to step S33. In step S33, it is determined whether or not the telephone number dialed during the calling operation is a priority dial. The priority dial is a telephone number of a public institution such as a police station or a fire department, or a telephone number which is preferentially connected to a hospital or the like. If it is determined that the dialing destination is the priority dial, the process proceeds to step S36, where the main power is turned on, and the mobile phone is set in a communicable state.

If it is determined in step S33 that the call is not a priority dial, the flow proceeds to step S34, where the control unit 49 compares the time of the timer 51 with the transmission permitted time period included in the communication restriction information. Thus, it is determined whether or not the present time is in a time zone in which calling is permitted. here,
If it is determined that the present time is a time period in which the transmission is permitted, the process proceeds to step S35, and it is determined whether or not a predetermined time has elapsed since the previous transmission of the own device. If the predetermined time has elapsed since the last transmission, step S36
The main power is turned on and the mobile phone is set in a communicable state. In this way, even if the call is permitted, the call is prohibited only at predetermined time intervals, thereby prohibiting the call from being occupied by only a specific mobile phone and preventing the call from being transmitted to many mobile phones. Give them the opportunity. In addition, since it is impossible to make a call other than the priority dial unless the call is permitted, a sufficient emergency line can be secured. Furthermore, since the main power supply is turned off during a time period in which calling is not permitted, there is no random calling from the mobile phone such as location registration, so that line congestion can be prevented. . In addition, since the main power supply is turned off, the consumption of the battery can be prevented, and a long-term wireless line can be secured.

When the main power supply is turned on in step S36, the common control channel (CCC) is turned on in step S37.
Location registration is performed using the uplink channel of H).
Here, assuming that the mobile phone whose main power is turned on is the mobile phone 101, the mobile phone 101 comes to belong to the wireless zone A due to the location registration with the base station 10. Next, a calling process based on the calling operation detected in step S38 is performed. In this calling process,
A transmission signal is transmitted to the base station through an uplink channel of a common control channel (CCCH). The base station performs processing for connecting to the other party, and when the other party responds, the line is connected and communication becomes possible. When the transmission processing is completed, the communication state is established, and it is determined in step S39 whether the transmission time limit time has been exceeded. This determination is made by comparing the transmission duration information obtained by the control unit 49 with reference to the time of the timer 51 with the transmission restriction time information included in the received communication restriction information. If it is determined that the transmission continuation time has exceeded the transmission limit time, the communication is forcibly terminated in step S40.

If it is determined that the transmission continuation time does not exceed the transmission limit time, it is determined in step S42 whether or not the end button has been operated to end the communication. At this time, if the end button has been operated, the communication is terminated, and if it is not determined that the end button has been operated, it is determined in step S39 and step S41 that the transmission duration time has exceeded the transmission limit time. Or until the end button is determined to have been operated. In this way, even if a call is in progress, if the call time exceeds the time limit, the communication is forcibly terminated, thereby preventing only a specific mobile phone from occupying the line and allowing many mobile phones to use the line. I'm trying to give out the opportunity.

When the end button is operated,
If the communication is forcibly terminated in step S40, and if it is determined in step S35 that a predetermined time has not elapsed since the last transmission, it is determined in step S34 that the current time is not a time zone in which transmission is permitted. If it is determined that the calling operation has not been performed in step S32, the process proceeds to step S42. In step S42, it is determined whether the broadcast channel (BCCH) has been received and the communication restriction release information has been received. If the information has been received, the restriction on access has been released, so that it is determined in step S13 shown in FIG. Normal processing is performed. If not received, the process returns to step S31, and the processing of steps S31 to S42 is executed in a cyclic manner.

[0030]

As described above, according to the present invention, when the access of the mobile terminal station is restricted, the mobile terminal station operates only in the time zone allocated to secure the line for emergency communication. Be able to send. Further, only when a predetermined time or more has elapsed since the last transmission in the time zone in which the transmission is permitted, communication to a destination other than the emergency destination is enabled. As described above, since transmission is prohibited unless a predetermined time has elapsed since the last transmission, communication resources can be distributed to many mobile terminal stations.

Further, in the event of a disaster or the like, when communication is connected during a time period in which calling is permitted, communication tends to continue for a long time. When the transmission time of the communication exceeds the time limit, the communication is forcibly terminated. As a result, the time occupied by one call can be shortened, so that an opportunity to make a call to a large number of mobile terminal stations in a time zone in which the call is permitted is provided. Furthermore, when the access of the mobile terminal station is regulated, the main power is turned off,
This eliminates the need for location registration or the like that the mobile terminal station accesses at random, thereby alleviating traffic congestion. In addition, the battery of the mobile terminal station can be prevented from being consumed, which is effective as a means for securing communication of the mobile terminal station for a long time in the event of a disaster or the like in which a power outage may occur.

[Brief description of the drawings]

FIG. 1 is a diagram showing an outline of a mobile communication system for describing an embodiment of an access restriction method of the present invention.

FIG. 2 is a diagram showing a hardware configuration of a mobile terminal station that can execute the access restriction method according to the present invention.

FIG. 3 is a flowchart of a start process executed under control of a control unit when a power switch of a mobile phone as a mobile terminal station according to the present invention is turned on.

FIG. 4 is a flowchart of a normal process executed in a start process.

FIG. 5 is a flowchart of a communication restriction process executed in a start process.

[Explanation of symbols]

1 mobile exchange, 2 public exchange, 10, 11, 12
Base station, 21 Disaster management center, 22 General telephone, 4
0 antenna, 41 duplexer, 42 receiver, 43 P
LL circuit, 44 transmitter, 45 transmitter / receiver, 46 baseband signal processor, 47 receiver, 48 transmitter, 4
9 control unit, 49a key scanning means, 50 display / key unit, 51 timer, 101-10n mobile phone, A wireless zone

Claims (6)

[Claims] When restricting access of a mobile terminal station,
The base station managing communication of the mobile terminal station transmits communication restriction information to the mobile terminal station using a broadcast channel, and the mobile terminal station that has received the communication restriction information executes communication restriction processing. In addition, when the access of the mobile terminal station is not restricted, the mobile terminal station performs a normal incoming call process and an outgoing call process. In the permitted time zone, when a call operation is detected after a predetermined time has elapsed from the previous call, the main power is turned on, and a call process based on the call operation is performed. Characteristic access terminal method of mobile terminal station. 2. The communication system according to claim 1, wherein when the transmission time of the communication connected by the transmission processing performed during the communication restriction processing exceeds a predetermined time, the communication is forcibly terminated. The access control method of the mobile terminal station described in the above. 3. When a call operation to a connection destination to be preferentially connected is detected while the main power supply of the mobile terminal station is off, the main power supply is turned on to make the call. 2. The access control method for a mobile terminal station according to claim 1, wherein a calling process based on an operation is performed. 4. A mobile terminal station comprising at least a transmitting / receiving unit, a key unit provided with keys for performing a call operation, dialing and the like, and a control unit for controlling operations of the transmitting / receiving unit and the key unit. When the control unit detects that the communication restriction information for restricting the access of the mobile terminal station through a broadcast channel from the base station that manages the communication of the mobile terminal station is received by the transmitting and receiving unit, The unit is configured to turn off power supply to parts other than the key unit and the control unit,
The power supply is turned on when a call operation is detected after a predetermined time has elapsed from the previous call in a time zone in which the call is permitted, and a call process based on the call operation is performed. A mobile terminal station, characterized in that: 5. The mobile terminal according to claim 4, wherein when the transmission time of the communication connected by performing the transmission processing exceeds a predetermined time, the control unit forcibly terminates the communication. Bureau. 6. When the power supply to parts other than the key part and the control part is turned off and the control part detects a call operation to a connection destination to which connection is preferentially made, 5. The mobile terminal station according to claim 4, wherein the power supply is turned on to perform a calling process based on the calling operation.