JPH11331941A - System and equipment for communication for mobile object - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve line traffic efficiency by inhibiting hand-off to switch a base station to be connected in the state of fixing communication equipment for mobile object in a communication system for a mobile object. SOLUTION: A portable telephone set 10 is provided with a transmission circuit 22, a reception circuit 23, an AGC circuit 24 and a system control circuit (microcomputer) 31, and based on an output voltage Vgc of the AGC circuit, the intensity of a received electric field is detected. This portable telephone set is provided with a position detecting part 34 for detecting of the portable telephone set on a charging stand 40, a request sending means to react to the detection output of the placement detecting part can be realized with a software and the request of inhibiting the hand-off or canceling the inhibition is transmitted to the base station. On the side of base station, when the portable telephone set is placed on the charging stand, the communication through a control channel for hand-off is inhibited corresponding to this request and on the side of the portable telephone set, the intensity detection of the unwanted received electric field is stopped. This inhibition or cancel of inhibition can be displayed on a display 15 of the portable telephone set as well.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile communication system and a mobile communication device suitable for, for example, a portable telephone.

[0002]

2. Description of the Related Art In recent years, portable telephones using public wireless lines have been rapidly spread due to the fact that they can be moved over a relatively wide range and the degree of freedom of a call position is large.

As shown in FIG. 7, a public mobile telephone system has a plurality of base stations 1 each having a service area SAa, SAb, SAc # having a radius of several km, for example.
a, 1b, 1c} and trunk lines TKa, TKb, TKc}
And an exchange control station 2 connected to each of the base stations 1a, 1b, 1c}.

[0004] Individual mobile telephones 10 can communicate via the corresponding base stations 1a, 1b, 1c} only in each service area SAa, SAb, SAc #.

[0005] Each mobile telephone 10 is registered with a base station whose service area is its location, even when moving, based on wireless communication on a predetermined control channel.

[0006] Then, the portable telephone 10 moves from the service area SAa of an arbitrary base station 1a to the adjacent base station 1b.
When the mobile station moves to the service area SAb, the base station connected to the mobile phone 10 is set near the boundary between the service areas SAa and SAb based on the strength of the radio wave of the control channel from both base stations 1a and 1b. A so-called "handoff" is performed in which one base station 1a is switched to the other base station 1b.

[0007] When the handoff is performed, the base station updates the location registration of the mobile phone 10 from one base station 1a to the other base station 1b.

[0008]

By the way, with the spread of portable telephones, personalization has progressed and the frequency of use in homes and offices has increased as well as use while traveling or traveling.

However, in the above-described portable telephone system, since both the portable telephone and the base station are set on the premise of the above-described handoff accompanying the movement of the portable telephone, the home telephone system is not used. Even when a mobile phone is used in a substantially fixed state in an office or office, communication on the control channel for handoff causes unnecessary traffic to be generated on the wireless line, and the efficiency of the line traffic is reduced. There was a problem that was worse.

In view of the foregoing, an object of the present invention is to improve the efficiency of line traffic by prohibiting handoff when the mobile telephone is used in a fixed state.
A mobile communication system and a mobile communication device are provided.

[0011]

In order to solve the above-mentioned problems, a mobile communication system according to the present invention comprises a plurality of base stations each having a predetermined service area, and a plurality of base stations each having a predetermined service area. In a mobile communication system including a nearest base station and a mobile communication device connected by a wireless line based on wireless communication, a mobile communication device of a requesting mobile communication device responds to a predetermined request from the mobile communication device. Communication control means for prohibiting and canceling the radio communication between the device and the nearest base station is provided.

In the mobile communication system according to the first aspect of the present invention, a requesting mobile communication device is transmitted in a substantially fixed state from the mobile communication device. Wireless communication on the control channel for handoff for switching base stations to be connected is prohibited, unnecessary traffic is avoided, line traffic efficiency is improved, and cheaper call rates can be set. become.

According to a second aspect of the present invention, there is provided a mobile communication device including an antenna, a transmitting unit, a receiving unit, a key input unit, and a display unit, a receiving electric field intensity detecting unit, and detection of the receiving electric field intensity detecting unit. Based on the output,
A base station selecting means for selecting the nearest base station from a plurality of base stations capable of performing predetermined radio communication, wherein the base station selecting means selects the nearest base station in response to a predetermined input corresponding to a fixed or moving state. Request transmission means for transmitting a request for prohibition and release of the prohibition of the radio communication to the base station, and prohibition and prohibition of prohibition of selection of the nearest base station by the base station selection means in response to the predetermined input. The present invention is characterized in that selection control means is provided.

In the mobile communication device according to the second aspect of the present invention, the mobile communication device is fixed.
A request to prohibit radio communication is sent, and in response to this request, the base station prohibits radio communication on the control channel for handoff, thereby avoiding the generation of unnecessary traffic and reducing the efficiency of line traffic. improves.

According to a third aspect of the present invention, in the mobile communication device according to the second aspect, the selection control means and the request sending means respond to a specific key input of the key input means. And control
An input and display control means for controlling the selection control means and the request sending means to display the prohibition and the cancellation of the prohibition on the display means are provided.

In the mobile communication device according to the third aspect of the present invention, when the mobile communication device is fixed,
A request to prohibit wireless communication is transmitted based on an appropriate key operation by the user, and in response to this request, the base station side prohibits wireless communication on the control channel for handoff, thereby causing unnecessary traffic. Is avoided, and the efficiency of line traffic is improved.

Further, the prohibition and release of the prohibition of the wireless communication for the handoff are displayed on the display of the mobile communication device, so that the user's operation error is prevented.

According to a fourth aspect of the present invention, there is provided a mobile communication apparatus according to the second aspect, further comprising a pedestal placement detecting means for detecting placement and detachment from a predetermined pedestal. The request sending means and the selection control means respond to a detection output of the pedestal placement detecting means.

In the mobile communication device according to the fourth aspect of the present invention, the prohibition and the release of the prohibition and the prohibition of the wireless communication for the handoff are automatically selected in accordance with the placement and the detachment from the predetermined pedestal. Therefore, when the mobile communication device is fixed on the pedestal and the mobile communication device is fixed, the base station side prohibits wireless communication on the control channel, thereby avoiding the generation of unnecessary traffic and reducing the efficiency of line traffic. improves.

According to a fifth aspect of the present invention, there is provided a mobile communication device including an antenna, a transmitting unit, a receiving unit, a key input unit, and a display unit, a receiving electric field intensity detecting unit, and a detection of the receiving electric field intensity detecting unit. Based on the output,
A base station selecting means for selecting a nearest base station from a plurality of base stations capable of performing predetermined wireless communication, the base station selecting means for detecting mounting and detachment on a predetermined base. Request transmitting means for transmitting a request for prohibiting and canceling the prohibition of the wireless communication to the nearest base station in response to a detection output of the pedestal mounting detecting means, and a detection output of the pedestal mounting detecting means. And selection control means for prohibiting the selection of the nearest base station by the base station selection means and canceling the prohibition.

In the mobile communication apparatus according to the fifth aspect of the present invention, the prohibition and the release of the prohibition and the prohibition of the wireless communication for the handoff are automatically performed in response to the placement and the removal from the predetermined base. When the mobile communication device is mounted on the base and the mobile communication device is fixed, wireless communication on the control channel is prohibited on the base station side, thereby avoiding the generation of unnecessary traffic, and Increases traffic efficiency.

According to a sixth aspect of the present invention, there is provided a mobile communication apparatus according to the fourth or fifth aspect, further comprising a communication interface means.
A second communication interface corresponding to the communication interface is provided on the pedestal.

[0023] In the mobile communication device according to the sixth aspect of the present invention, by connecting a computer or the like to the second communication interface, usability in performing data communication via the mobile communication device is improved.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a mobile communication device according to the present invention will be described below with reference to FIGS.

[Structure of Embodiment] FIG. 2 shows the structure of the embodiment of the present invention.

In FIG. 2, a portable telephone 10 includes a transmitting / receiving antenna 11 and a transmitter 12 and a receiver 1 as a so-called man-machine interface.
3. It is provided with various input keys including a dial key 14, and a liquid crystal display 15.

A transmission circuit 22 and a reception circuit 23 are connected to the shared circuit 21 connected to the antenna 11 to transmit and receive a high-frequency transmission signal and a high-frequency reception signal. The receiving circuit 23 includes an AGC circuit 24.

The transmission circuit 22 and the reception circuit 23 are also connected to a baseband processing circuit 25 to exchange transmission signals and reception signals.

The baseband processing circuit 25 is connected to the transmitter 12 and the receiver 13 via the audio amplifier circuits 26 and 27, respectively, to transmit and receive audio signals.

The transmission circuit 22 and the reception circuit 23
And the baseband processing circuit 25 are connected to a system control circuit (microcomputer) 31 to transmit and receive control signals, and the output voltage Vgc of the AGC circuit 24 is supplied to the system control circuit 31.
The input level of the high-frequency reception signal, in other words, the electric field strength of the radio wave from the receivable base station is detected. The detection of the electric field strength is executed by an interruption routine of a predetermined cycle.

Various input keys such as the dial key 14 are connected to the system control circuit 31, and a ROM 32 storing various programs is connected to the system control circuit 31.

The liquid crystal display 15 is connected via the drive circuit 33, and displays, for example, an inputted telephone number.

Further, for example, required DC power is supplied to each unit from a power supply 39 composed of an appropriate secondary battery such as a lithium ion storage battery. The above configuration is the same as that of a conventional mobile phone.

In this embodiment, a hand-off switching processing routine described later is stored in the ROM 32,
A charging stand placement detection unit 34 for detecting placement on the charging stand 40 as shown in FIG. 1 is provided and connected to the system control circuit 31.

The system control circuit 31 according to this embodiment includes reception electric field strength detection means, base station selection means, selection control means, and request transmission means as functional means. These functional means are realized by microcomputer software.

As shown in FIG. 3, the charging stand 40 is provided with a charging circuit 41, and the mobile phone 10 is placed on the charging stand 40 in correspondence with the charging stand placement detecting section 34 as described above. Placement detection output unit 44 for detecting that the
Is provided.

When the above-described portable telephone 10 is placed on the charging stand 40, the charging circuit 41 is connected to the power supply 39, the secondary battery is charged, and the placement detection output unit 44 The charging stand placement detection unit 34 is mechanically or electrically coupled to the charging stand placement detection unit 34, and a detection signal of the charging stand placement detection unit 34 is supplied to the system control circuit 31.

When the mobile phone 10 is removed from the charging stand 40, the charging circuit 41 is disconnected from the power supply 39, charging of the secondary battery is stopped, and the placement detection output section 44 and the charging stand placement The coupling with the detection unit 34 is released,
The detection signal of the charging stand placement detector 34 disappears.

The system control circuit 31 executes the following hand-off switching process, and automatically selects the prohibition of hand-off and the release of the prohibition according to the attachment / detachment of the mobile phone 10 to / from the charging stand 40. You.

[Handoff Switching Process of Embodiment] Next, a handoff switching process of an embodiment of the present invention will be described with reference to FIG.

When the hand-off switching processing routine 100 according to this embodiment is started, in a first step 101, it is determined whether or not the mobile phone is placed on the charging stand.
In other words, it is determined whether the mobile phone is used in a fixed state. This determination is made based on the detection signal of the charging stand placement detector as described above.

If the mobile phone is placed on the charging stand and the hand-off process is meaningless, the process proceeds to step 102, where the above-described electric field strength detection routine is stopped, so that the hand-off process on the mobile phone side can be performed. It is forbidden.

In the next step 103, a request to prohibit the handoff process is transmitted to the base station, and the base station responds to the prohibition request using, for example, software in the above-mentioned switching control station (see FIG. 7). The communication control means, which is implemented as above, prohibits wireless communication using a control channel between the requesting mobile phone and the nearest base station for handoff processing, and the routine 100 ends.

On the other hand, if the portable telephone is removed from the charging stand and it is determined in step 101 that the portable telephone is not placed on the charging stand, the process proceeds to step 104,
By starting the above-described electric field strength detection routine, the prohibition of the handoff process on the mobile phone side is released.

In the next step 105, a request for handoff processing prohibition release is transmitted to the base station. In response to this prohibition release request, the base station side uses the above-described communication control means to perform handoff processing prohibition. The prohibition of the wireless communication on the control channel between the requesting mobile phone and the nearest base station is released, and the routine 100 ends.

The above-described request for prohibition and release of handoff is transmitted in an appropriate signal format and content.

Also, as shown by the dotted lines in FIG. 1, in steps 103 and 106, a request to prohibit and release the prohibition of the handoff process is transmitted,
In step 06 and step 107, it is also possible to display on the display of the mobile phone the prohibition and prohibition of the handoff process.

As described above, in this embodiment, the placement detection unit on the charging stand is provided on the mobile phone side, and when the mobile phone is placed on the charging stand and is substantially fixed, Automatically sends a request to prohibit hand-off processing to the base station side, so that the base station side prohibits wireless communication on the control channel for hand-off processing. By avoiding the occurrence, the efficiency of the line traffic can be improved, and the telephone company can set a lower call rate than usual.

[Other Embodiments] In the above-described embodiment, while the mobile phone is placed on the charging stand and is substantially fixed, the handoff process on the base station side is prohibited. It is possible to increase the efficiency of line traffic and to set a lower call rate than usual. Therefore, even if a mobile phone is used for the second line for data communication such as Internet access, the call charge is Will not be so high.

Next, another embodiment of the mobile communication device according to the present invention suitable for data communication will be described with reference to FIGS.

FIG. 4 shows the configuration of another embodiment of the present invention. 4, parts corresponding to those in FIG. 2 are given the same reference numerals, and a part of the description will be omitted.

In FIG. 4, the mobile phone 10 C includes a transmitting / receiving antenna 11, a transmitter 12, a receiver 13, various input keys including a dial key 14, and a liquid crystal display 15.

The transmitting circuit 22 and the receiving circuit 23 are connected to the shared circuit 21 connected to the antenna 11 to exchange high-frequency transmission signals and high-frequency reception signals. The receiving circuit 23 includes an AGC circuit 24.

The transmission circuit 22 and the reception circuit 23 are also connected to a baseband processing circuit 25, and exchange transmission signals and reception signals.

The baseband processing circuit 25 is connected to the transmitter 12 and the receiver 13 via the audio amplifier circuits 26 and 27, respectively, to transmit and receive audio signals.

Then, the transmission circuit 22 and the reception circuit 23
And the baseband processing circuit 25 are connected to a system control circuit (microcomputer) 31 to transmit and receive control signals, and the output voltage Vgc of the AGC circuit 24 is supplied to the system control circuit 31.
An electric field strength of a radio wave from a receivable base station is detected by an interruption routine of a predetermined cycle.

Various input keys such as the dial key 14 are connected to the system control circuit 31, and a ROM 32 storing various programs including the above-described hand-off switching processing routine is connected to the system control circuit 31.

The liquid crystal display 15 is connected via the drive circuit 33, and displays, for example, an inputted telephone number.

Further, required DC power is supplied to each unit from a power supply 39 composed of an appropriate secondary battery. The configuration described above is the same as that of FIG.

Further, in this embodiment, a charging stand placement detector 34 for detecting placement on the charging stand 40C as shown in FIG. 5 is provided, and a communication interface 35 such as RS232C is provided. Provided and connected to the system control circuit 31 respectively.

As shown in FIG. 5, a charging circuit 41 is provided in the charging stand 40C, and the portable telephone 10C is connected to the charging stand 4C in correspondence with the charging stand placement detecting section 34 as described above.
And a communication interface 35 of the mobile phone 10C.
, A communication interface 45 is provided. The communication interface 45 is connected to the communication interface 51 of the computer 50.

When the above-mentioned portable telephone 10C is placed on the charging stand 40C, the charging circuit 41 is connected to the power supply 39 to charge the secondary battery, and the charging circuit 41 The charging stand placement detection unit 34 is mechanically or electrically coupled to the charging stand placement detection unit 34, and a detection signal of the charging stand placement detection unit 34 is supplied to the system control circuit 31.

The communication interface 35 of the portable telephone 10C is connected to the communication interface 4 of the charging stand 40C.
5, and is connected to the communication interface 51 of the computer 50, thereby improving the usability when performing data communication using the mobile phone 10C.

Then, the mobile phone 10 is connected to the charging stand 40C.
When C is removed, the charging circuit 41 is disconnected from the power supply 39, charging of the secondary battery is stopped, and the coupling between the placement detection output unit 44 and the charging stand placement detection unit 34 is released. The detection signal of the charging stand placement detector 34 disappears.

In the system control circuit 31, the above-described hand-off switching process is executed, and the charging stand 40C
The prohibition or the prohibition release of the handoff is selected according to the attachment / detachment of the mobile phone 10C to / from the mobile phone.

As described above, in this embodiment, the placement detection unit on the charging stand is provided on the mobile phone side,
When the mobile phone is placed on the charging stand and is substantially fixed, the hand-off process on the base station side is prohibited, so that unnecessary traffic is avoided and the efficiency of the line traffic is increased. It is possible for the telephone company to set a lower call rate than usual, and even if a mobile phone is used for the second line for data communication,
Compared with the case of using a normal telephone line, the call charge is not so high. Further, by taking into account time-limited conditions such as late night and early morning, it is possible to further reduce the charge.

In this embodiment, a communication interface is provided on the portable telephone, and a communication interface corresponding to the communication interface is also provided on the charging stand so as to be connected to the communication interface of the computer. The reduction in charge improves usability when data communication is performed using the mobile phone as the second line.

By making the computer side of the communication interface of the charging stand into an infrared detection method, the computer and the charging stand can be electrically disconnected from each other. Can be further improved.

[Handoff Switching Process of Another Embodiment]
The above-described embodiments of FIGS. 2 and 5 both assume that the mobile phone is mounted on a charging stand. Therefore, in order to use the mobile phone in a car, the mobile phone is used as an in-vehicle accessory such as a so-called hands-free kit. When it is mounted and power is supplied from a car battery, it cannot be applied as it is.

Therefore, according to the present invention, a function for prohibiting and canceling the prohibition of handoff is assigned to an appropriate input key of the mobile phone, and the handoff is inhibited according to the use condition of the mobile phone by a key operation of the user. And prohibition cancellation.

For this reason, the hardware of the portable telephone is
The configuration is the same as the conventional configuration except that the charging stand placement detection unit 34 is removed from the configuration as shown in FIG. However, the ROM 32 stores a handoff switching processing routine 2 as described below.
00 is stored.

The system control circuit 31 according to this embodiment includes, as functional units, a reception field strength detection unit, a base station selection unit, a selection control unit, a request transmission unit, and an input and display control unit. These functional means
It is realized by microcomputer software.

Next, a handoff switching process according to another embodiment of the present invention, which is suitable for use of a portable telephone in a car, will be described with reference to FIG.

When the hand-off switching processing routine 200 as shown in FIG. 6 is started, in a first step 201, the operation of the input key is waited for by the user. It is determined whether the handoff key to which such a predetermined function is assigned has been operated. If the operated input key is not the handoff key, the process proceeds to step 210, where other processing is executed.

If it is determined in step 202 that the predetermined hand-off key has been operated, the process proceeds to step 203, where it is determined whether the hand-off of the portable telephone itself is prohibited at the present time.

If the mobile phone itself is not in the hand-off prohibition, that is, the hand-off prohibition is being canceled, the process proceeds to step 204 to stop the above-described electric field strength detection routine, thereby prohibiting the hand-off process on the mobile phone side. Is done.

In the next step 205, a request to prohibit the handoff process is transmitted to the base station. In response to the prohibition request, the base station side prohibits the update of the location registration of the requesting mobile phone, thereby performing the handoff process. Is forbidden.

In the next step 206, the prohibition of the hand-off process is displayed on the display of the portable telephone, and the routine 200 ends.

On the other hand, if it is determined in step 203 that the mobile phone itself is in the state of prohibiting handoff, the process proceeds to step 207 to start the above-described electric field strength detection routine, thereby prohibiting handoff processing on the mobile phone side. It is released.

In the next step 208, a request for handoff processing prohibition release is transmitted to the base station, and in response to the prohibition release request, the base station side prohibits release of the location registration update of the requesting mobile phone. Then, the prohibition of the handoff process is released.

In the next step 209, the release of the prohibition of the hand-off process is displayed on the display of the mobile phone.
The routine 200 ends.

The above-described request for prohibition and release of handoff is transmitted in an appropriate signal format and content.

As described above, in this embodiment, a function for prohibiting handoff and releasing prohibition is assigned to an appropriate input key of the mobile phone, so that the user can use the key in accordance with the usage status of the mobile phone. The base station side prohibits and releases handoff based on appropriate key operations, so during the handoff prohibition period, avoid unnecessary traffic and increase the efficiency of line traffic. This allows the telephone company to set a lower call rate than usual.

Further, in this embodiment, the prohibition and the release of the prohibition of the hand-off process are displayed on the display of the portable telephone, so that it is possible to prevent a user's key operation error.

[Other Embodiments] In the above-described embodiments, the mobile phones have been described. However, the present invention can be similarly applied to other mobile communication terminals and systems.

In the above-described embodiments, the case where the charging stand is used has been described. However, the base does not necessarily need a charging unit.

[0087]

As described above, according to the first aspect of the present invention, in a state where the mobile communication device is fixed, generation of unnecessary traffic is avoided, the efficiency of the line traffic is improved, and the cost is reduced. It is possible to set a simple call fee.

Further, according to the second aspect of the invention, unnecessary traffic is prevented from being generated while the mobile communication device is fixed, and the efficiency of the line traffic is improved.

According to the third aspect of the invention, unnecessary traffic is prevented from being generated based on an appropriate key operation by the user while the mobile communication device is fixed, and the efficiency of the line traffic is improved. In addition, it is possible to prevent the user from making mistakes in key operation.

Further, according to the invention of claim 4, when the mobile communication device is fixed on the pedestal and the mobile communication device is fixed, generation of unnecessary traffic is avoided, the efficiency of line traffic is improved, and It is possible to automatically cope with a state in which the body communication device is movable.

According to the fifth aspect of the present invention, unnecessary traffic is prevented from being generated by being placed on the pedestal and the mobile communication device being limited to a fixed state, and the efficiency of the line traffic is reduced. And the mobile communication device can automatically cope with a movable state.

Further, according to the invention of claim 6, it is possible to improve the usability when performing data communication via the mobile communication device.

[Brief description of the drawings]

FIG. 1 is a flowchart illustrating a handoff switching process of a mobile communication device according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of an embodiment of the present invention.

FIG. 3 is a block diagram for explaining an embodiment of the present invention.

FIG. 4 is a block diagram showing a configuration of another embodiment of the present invention.

FIG. 5 is a block diagram for explaining another embodiment of the present invention.

FIG. 6 is a flowchart illustrating a handoff switching process according to another embodiment of the present invention.

FIG. 7 is a conceptual diagram for explaining the present invention.

[Explanation of symbols]

10, 10C mobile phone, 11 antenna, 12 transmitter, 13 receiver, 14 dial keys, 15 liquid crystal display, 22 transmission circuit, 23 reception circuit, 24
... AGC circuit, 25 ... Baseband processing circuit, 31 ... System control circuit (microcomputer), 32 ... RO
M, 33: drive circuit, 34: charging stand placement detector, 35:
Communication interface, 39: power supply, 40, 40C: charging stand, 41: charging circuit, 44: placement detection output unit, 45:
Communication interface, 50: Computer, 51: Communication interface, 100, 200: Handoff switching processing routine

Continued on the front page (51) Int.Cl. ⁶ Identification code FI H04M 1/66 H04M 19/08 11/00 302 H04B 7/26 Y 19/08 107 H04Q 7/28 H04Q 7/04 J

Claims (6)

[Claims] A plurality of base stations each having a predetermined service area, and a mobile communication device connected to a nearest base station by a radio line based on predetermined radio communication with the plurality of base stations. Communication control means for prohibiting and canceling the wireless communication between the requesting mobile communication device and the nearest base station in response to a predetermined request from the mobile communication device. A mobile communication system, comprising: 2. An antenna, a transmitting means, a receiving means, a key input means, and a display means, and a predetermined radio communication is possible based on a reception electric field strength detection means and a detection output of the reception electric field strength detection means. A mobile communication device comprising: a base station selecting means for selecting a nearest base station from a plurality of base stations; wherein the wireless base station communicates with the nearest base station in response to a predetermined input corresponding to a fixed or moving state. Request transmission means for transmitting a request for prohibition of communication and release of prohibition, and selection control means for prohibiting and canceling the prohibition of selection of the nearest base station by the base station selection means in response to the predetermined input; A mobile communication device characterized by the above-mentioned. 3. The mobile communication device according to claim 2, wherein said request sending means and said selection control means control so as to respond to a specific key input of said key input means. A mobile communication device comprising input and display control means for controlling the selection control means to display prohibition and cancellation of prohibition on the display means. 4. The mobile communication device according to claim 2, further comprising pedestal placement detection means for detecting placement and detachment from a predetermined pedestal, and sending said request to a detection output of said pedestal placement detection means. Means and a selection control means responsive thereto. 5. An apparatus comprising an antenna, a transmitting means, a receiving means, a key input means, and a display means, and a predetermined radio communication is possible based on a reception electric field strength detection means and a detection output of the reception electric field strength detection means. A mobile communication device comprising: a base station selecting means for selecting a nearest base station from a plurality of base stations; and a pedestal mounting detecting means for detecting mounting and detachment from a predetermined pedestal. Request sending means for sending a request for prohibiting and canceling the prohibition of the wireless communication to the nearest base station in response to the detection output of the detecting means; and the base station in response to the detection output of the pedestal mounting detecting means. A mobile communication device comprising: selection control means for prohibiting and canceling the selection of the nearest base station by the selection means. 6. The mobile communication device according to claim 4, further comprising a communication interface means, and a second communication interface means corresponding to the communication interface means provided on the base. Mobile communication device.