JPH10215479A - Mobile communication system and its switching device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the wrong incoming calls by storing the dial information to be sent to a home exchange into a mobile terminal and then sending automatically the dial information in an outgoing operation in response to a position register request that is produced in a service area of an exchange other than the home exchange. SOLUTION: When a power supply is applied after a mobile terminal PSa1 using a private branch exchange EXa as a home exchange have moved to a business office B from a business office A, a private branch exchange EXb performs its processing in response to a position register request. At the same time, an additional number, e.g. '7-300' is read out of a data base to be sent to the exchange EXb serving as the home exchange. This additional number is stored in an additional number storage part of the terminal PSa1. When the terminal PSa1 performs an outgoing operation with a mobile terminal PSa2, for example, defined as its destination based on the telephone directory information, the number '7-300' is automatically dialed.

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 such as an automobile / portable telephone system and a cordless telephone system, and a switching device thereof.

[0002]

2. Description of the Related Art In recent years, various functions have been added to a mobile communication system which has been rapidly developed, and some of them have an extension communication function. This system includes, for example, an exchange provided for each business office, an associated base station, and mobile terminals connected to the base station via a radio line.

[0003] In addition to a normal outside line transmission within a service area formed by each base station, each mobile terminal performs an extension call with an intended terminal by inputting a predetermined extension number, and provides various services. You can receive. The extension number is input based on a system predetermined for each business establishment.

Generally, in this type of system, exchanges in offices scattered in various places are connected by a communication line to form a network. This way,
Although various advantages such as the possibility of extension calls between offices are provided, the following problems also occur. That is, when the mobile terminal moves from the service area (home area) of the business office that is the home office of the own station to the service area of another business office, the terminal desiring to make a call based on the extension number system in the home area I cannot make calls to.

Referring to FIG. 17, for example, when a mobile terminal PS1 having an area A as a home area calls a PS2 having the same area A as a home area, a predetermined extension number (for example, 5000) is dialed. As a result, both lines are established. On the other hand, if a similar calling operation is performed on PS2 while PS1 has moved to area B, a call will be received to mobile terminal PS3 having extension number "5000" in area B.

In order to avoid such a situation, for example, an operation of adding a predetermined additional number to the extension number "5000" and inputting it is necessary. Conventionally, this operation is manually performed by the user. Therefore, an extra burden is imposed on the user, which is inconvenient in operation. Also, in the above example, the case where there are only two service areas is illustrated, but as the network configuration becomes more complicated, the number of service areas also increases, and the user is forced to perform different operations each time he moves to a different mobile terminal. .

[0007] Further, the extension number system is defined for the purpose of receiving a predetermined service in addition to the one for the purpose of making and receiving calls between terminals. Here, a service special number is also provided for each service area. If different, the service requested by the user may not be provided, which is very inconvenient in this respect as well.

[0008]

As described above, in the conventional mobile communication system, even if the mobile terminal attempts to make a call or receive a desired service in an area other than the home area, the mobile terminal is in the home area. In the same terminal operation as described above, incoming calls to the desired terminal may not be made,
In some cases, service was not available.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a mobile communication system capable of receiving a call to the same terminal by the same terminal operation as in the home area, regardless of the service area, and a switching device therefor. is there.

Another object of the present invention is to provide a mobile communication system capable of receiving the same service by operating the same terminal as in the home area, regardless of the service area, and a switching device therefor. Is to do.

[0011]

In order to achieve the above object, the present invention uses the following means. (1) A mobile communication system according to the present invention includes: a plurality of exchanges connected to each other via a communication line; and a plurality of mobile terminals registered in advance in any of these exchanges as terminals belonging thereto. A switching unit, when a location registration request arrives from the mobile terminal, a determination unit for determining whether the mobile terminal is a mobile terminal belonging to the mobile terminal, and the mobile terminal is not a mobile terminal belonging to the mobile terminal by the determination unit. Notifying means for notifying the mobile terminal of the location registration request source of the exchange originating dial information for transmitting to the home exchange to which the mobile terminal belongs, when it is determined that
And a storage unit for storing, in the mobile terminal, an exchange originating number notified from the exchange at the time of a location registration request, and an exchange storing dialing destination information in the storage unit when a calling operation is performed. Transmission control means for converting the outgoing dial information into dial information for transmitting to the home exchange, and transmitting the converted dial information to the located exchange in which the terminal is registered. .

[0012] With this configuration, when the user moves to the service area of an exchange other than the home exchange and performs a calling operation here, the mobile terminal automatically sends the inputted destination dial information to the home exchange. Is converted to dial information and sent to the local exchange. For this reason, for example, even if the user makes a call to a desired extension number in the home area by the same operation as when the user is in the home area in another service area, this call is transferred from the serving exchange to the home exchange and the desired extension is transmitted. The call will be received by the terminal. Therefore, even when the user is in a service area other than the home area, the user can call a desired terminal in the home area with the same operation as in the home area, thereby preventing erroneous calls and improving user operability. be able to.

Further, since the conversion of the dial information is performed in the mobile terminal, the processing load on the exchange can be reduced. Furthermore, since the dialing information for conversion is automatically notified from the serving exchange to the mobile terminal at the time of location registration of the mobile terminal, there is no need for the user to input and set the dialing information for conversion. Further, since it is not necessary to transfer the dialing information for conversion from the local exchange to the mobile terminal each time the mobile terminal originates a call, the processing load on the exchange at the time of outgoing / incoming call can be reduced and the processing time can be shortened accordingly. .

(2) The mobile communication system according to the present invention comprises:
In the mobile communication system according to the above (1), when phonebook information for a home exchange is stored in the mobile terminal, it is determined whether or not the calling operation is a calling operation using the phonebook information. Means for determining, when it is determined that the call operation is performed using the telephone directory information, the other party's dial information is converted into dial information for transmitting to the home exchange and transmitted to the local exchange, and the telephone directory information is transmitted. When it is determined that the call operation is not the used call operation, the other party's dial information is transmitted to the exchange in the area without any change.

In this way, by selecting whether or not to make a call using the telephone directory, the call to the home area and the call to the in-service area can be selectively performed.

(3) The switching device of the present invention comprises a plurality of switching devices connected to each other via a communication line, and a plurality of mobile terminals registered in advance in any of the switching devices as belonging terminals. In the switching device used in the mobile communication system provided, when a location registration request arrives from the mobile terminal, a determination unit that determines whether the mobile terminal is a mobile terminal belonging to itself, Mode setting means for setting the use environment mode when the mobile terminal uses the own device to one of the home transmission mode and the area transmission mode based on the determination result of the determination means, and storing the mode; When an outgoing call request arrives from the terminal, the use environment mode set for the mobile terminal is determined based on the storage information of the mode setting means, and the home outgoing mode is determined. In this case, the destination dial information sent from the mobile terminal requesting the call is converted into dial information for calling the home exchange to which the mobile terminal belongs, and the converted dial information is converted to the home via the communication line. Means for sending to the exchange.

With this configuration, when the location of the mobile terminal is registered, whether the transmission mode from the mobile terminal is the transmission mode to the home exchange or the transmission mode to the serving exchange is set. Thereafter, when a call arrives from a mobile terminal in which the home call mode is set, the dial information is automatically converted to a signal for calling the home switch and transmitted to the home switch. Therefore, even when the user is in a service area other than the home area, the user can call a desired terminal in the home area with the same operation as when in the home area, thereby preventing erroneous calls and improving user operability. Can be planned.

Further, since the conversion of the dial information is performed in the exchange, there is no need to provide the mobile terminal with the function of converting the dial information. That is, there is an advantage that it is not necessary to change the function of the mobile terminal at all, and the existing mobile terminal can be used as it is.

(4) The switching device according to the present invention is the switching device according to the above (3), wherein the mode setting means comprises:
When a location registration request arrives from a mobile terminal that does not belong to the own device, the mobile terminal inquires whether to set the usage environment mode to the home transmission mode or the area transmission mode, and instructs the mobile terminal to respond to this inquiry The use environment mode is set according to the following.

With this configuration, it is possible to selectively set the home transmission mode and the in-area transmission mode for each mobile terminal as desired by the user. (5) In the switching device according to the present invention, in the switching device according to (4), the mode setting means stores the set use environment mode for a predetermined period of time, and requests a location registration request from a mobile terminal not belonging to the switching device. When arrives, determines whether the usage environment mode has been set in association with the mobile terminal,
When the setting is completed, the inquiry about the use environment mode to the mobile terminal is omitted.

In this way, if the mobile terminal that has once set the use environment mode temporarily moves to another service area and returns to this area, or if the power is temporarily turned off and then turned on again, Thus, the process of resetting the use environment mode is omitted. For this reason, the processing load on the exchange can be reduced accordingly.

(6) The switching device according to the present invention, in the switching device according to the above (3), when a predetermined service request using a special number arrives from a mobile terminal that does not belong to the own device, And a service providing control unit for converting the special number of the mobile terminal into a special number corresponding to the own apparatus and providing a service corresponding to the converted special number to the mobile terminal of the request source.

By providing such a configuration, not only a normal outgoing request but also a service request using a special number, such as a voice mail retrieval request or a transfer setting request, can be converted from the mobile terminal. The corresponding service is provided. For this reason, even when a special number indicating the same service is different between exchanges, it is possible to receive the same service as in the home area in the destination service area.

(7) The switching device according to the present invention, in the switching device according to the above (6), wherein the service provision control means provides the service when converting a special number of a service request received from a mobile terminal. It is characterized in that it is determined whether or not the own device has the function to perform the function, and if not, the information to that effect is notified to the requesting mobile terminal.

In this manner, the user of the mobile terminal can clearly know that the requested service cannot be provided in the service area of the destination, thereby reducing the user's anxiety. .

[0026]

BEST MODE FOR CARRYING OUT THE INVENTION

(First Embodiment) FIG. 1 is a diagram showing a schematic configuration of a mobile communication system according to a first embodiment of the present invention.

In FIG. 1, the private branch exchanges EXa and EXb installed at the establishments A and B are connected to each other via a subscriber network NW or a dedicated line PL. Each of the private branch exchanges EXa and EXb has a plurality of base stations BS.
a1 to BSan and BSb1 to BSbm are connected to form wireless zones Za1 to Zan and Zb1 to Zbm, respectively. These wireless zones Za1 to Zan, Zb1 to Zb
bm forms a service area covering each business office, and the mobile terminals PSa1-Ps
Saj, PSb1 to PSbk are located. These mobile terminals PSa1 to PSaj and PSb1 to PSbk are accommodated as extensions in respective private branch exchanges.

FIG. 2 shows the mobile terminals PSa1-PSaj,
FIG. 3 is a circuit block diagram illustrating a configuration of PSa1 to PSbk. In FIG. 2, base stations BSa1-BSan, BSb
1 to BSbm are transmitted to the antenna 6
High-frequency switch (SW) of the radio unit 6 after receiving at 1
The signal is input to the receiving unit 63 via 62. This receiving unit 63
In the above, the received radio frequency signal is mixed with a reception local oscillation signal generated from the frequency synthesizer 64 and frequency-converted into a reception intermediate frequency signal. Note that the local transmission frequency generated from the frequency synthesizer 64 is instructed by the control unit 10 according to the radio channel frequency. Also, the radio section 6 has a reception field strength detection section (RSS
I) 66 is provided. This reception electric field strength detection unit 6
In 6, the received electric field strength of the radio frequency signal arriving from the base station is detected, and the detected value is notified to the control unit 10 for searching for an empty channel or the like.

The received intermediate frequency signal output from the receiving section 63 is input to the demodulating section 71 of the modem section 7. The demodulation section 71 digitally demodulates the received intermediate frequency signal, thereby reproducing a digital communication signal. T
The TDMA decoding unit 81 of the DMA unit 8
From the digital communication signal output from the control unit 10
The digital communication signal inserted in the time slot allocated to the own device is extracted in accordance with the instruction of (1), and the extracted digital communication signal is input to the communication unit 9.

The communication unit 9 comprises an adaptive difference PCM codec (ADPCM-CODEC) 91 and a PCM codec (PCM-CODEC) 92. The digital communication signal is transmitted by the adaptive difference PCM codec 91 and the PCM codec 92. The signals are sequentially decoded and reproduced as analog speech signals. Then, the analog communication signal is amplified by a receiving amplifier (not shown) and then output from a speaker SP.

On the other hand, the transmission voice input to the microphone MIC is amplified by a transmission amplifier (not shown) in the communication unit 9 and then sequentially encoded by the PCM codec 92 and the adaptive difference PCM codec 91. It becomes a digital call signal. In the TDMA encoding unit 82 of the TDMA unit 8, the adaptive difference PCM codec 91
Is inserted into the time slot specified by the control unit 10 and input to the modulation unit 72. In the modulation section 72, the carrier signal is digitally modulated by the digital communication signal, and the modulated carrier signal is input to the transmission section 65 of the radio section 6.

In the transmitting section 65, the modulated carrier signal is mixed with a transmitting local transmission signal generated from the frequency synthesizer 64 to be frequency-converted to a radio channel frequency instructed by the control section 10, and further converted to a predetermined frequency. To the transmission power level of The radio frequency signal output from the transmitting unit 65 is transmitted from the antenna 61 to the base station via the high frequency switch 62.

The control unit 10 includes a key input unit 101 having dial keys and various function keys, an LCD drive circuit 102
And a storage unit 11, and a liquid crystal display (LCD) 103 is connected to the LCD drive circuit 102.

The storage unit 11 is, for example, a RAM, and includes a telephone directory storage unit 11a and an additional number storage unit 11b as shown in FIG. Phone book information for use in the home area is stored in the phone book storage unit 11a in advance. The additional number storage unit 11b is used to store an additional number to be transmitted to the home exchange, which is notified from the exchange at the time of location registration at the office B.

The control unit 10 includes, for example, a microcomputer as a main control unit. In addition to ordinary control functions such as a radio access control function and a call control function, a location registration control unit 10a as shown in FIG. It has additional number storage control means 10b and dial conversion transmission control means 10c.

The location registration control means 10a executes control for registering the location of the mobile station in the exchange according to a predetermined procedure when the mobile terminal is turned on and moves to another service area. .

The additional number storage control means 10b receives an additional number to be transmitted to the home exchange, which is notified from the exchange of the location registration destination at the time of location registration, and stores it in the additional number storage section 11b.

When a dialing operation is performed, the dial-conversion transmission control means 10c first determines whether or not the transmission is a transmission using telephone directory information. When making a call using the telephone directory information, it is determined that the call is to be processed by the home exchange, and at this time, the additional telephone number specified in the telephone directory information is stored in the additional number storage unit. 1
The dial information for home call is generated by adding the additional number stored in 1b. That is, the dial number is converted into dial information for home transmission. Then, the dial information is transmitted to the exchange in the service area. On the other hand, if the outgoing call is made by dial key entry without using the telephone directory information, it is determined that the outgoing call is an outgoing call to be processed by the local exchange, and the dialed number entered by the key is used as is. Send to exchange.

FIG. 3 is a circuit block diagram showing the configuration of the private branch exchange EXa. Note that the configuration of the private branch exchange EXb is the same as that of the EXa, and a description thereof will be omitted. The private branch exchange EXa includes an exchange circuit unit 100 and the exchange circuit unit 100.
, An exchange interface unit 300, an external interface unit 400, and a central control unit 500 and a memory 600.

The extension interface unit 300 has a plurality of extension interface circuits 301 to 30n, and base stations BSa1 to BSan are connected to the extension interface circuits 301 to 30n via extensions. The extension interface circuits 301 to 30n perform extension interface operations such as detection of outgoing signals from the base stations BSa1 to BSan and transmission of incoming signals to the base stations BSa1 to BSan.

The office line interface section 400 includes an office line interface circuit 401 and a dedicated line interface circuit 4.
The private line interface circuit 401 is connected to the subscriber network NW via the private line SL, and the private line interface circuit 402 is connected to the private branch exchange in another business office via the private line PL. I have. The office line interface circuit 401 and the dedicated line interface circuit 402
Interface operations such as detection of an incoming call from the station line SL and the dedicated line PL and capture of a line at the time of calling are performed.

By the way, the central control unit 500 includes a position registration acceptance control unit 500a and an additional number notification control unit 500b as shown in FIG. 5, in addition to the normal control functions related to the exchange control.

When a location registration request arrives from the mobile terminal, the location registration reception control means 500a determines whether or not this mobile terminal is eligible for registration based on the identification number of the mobile terminal, If there is a qualification, the identification number of the mobile terminal and its location information are registered.

The additional number notification control means 500b determines whether the mobile terminal whose location has been registered belongs to itself, and if the mobile terminal does not belong to the mobile terminal, the home terminal to which this mobile terminal belongs. It identifies the exchange and notifies the mobile terminal of an additional number for transmitting to the home exchange.

Next, the operation of the system configured as described above will be described. Now, for example, it is assumed that the mobile terminal PSa1 having the private branch exchange EXa as a home exchange has moved from the business establishment A to the business establishment B and transmitted a location registration request within the service area. Then, when the private branch exchange EXb receives the location registration request in step 6a as shown in FIG. 6, the private branch exchange EXb determines whether or not the mobile terminal making the registration request is a terminal having registration qualification. The identification number of the mobile terminal and its location information are registered. Then, in step 6b, it is determined whether this mobile terminal belongs to itself or belongs to another exchange. Since the mobile terminal PSa1 now uses the exchange EXa as the home exchange, the process proceeds to step 6d, in which a search is made for a database in the memory 600, for example, to read the additional number for transmission to the home exchange EXa.
This additional number is transmitted to the mobile terminal PSa1 in step 6e. If the mobile terminal that has performed the location registration belongs to the mobile terminal itself, the process proceeds from step 6b to step 6c.
Then, the information is transmitted to the mobile terminal without any additional number.

On the other hand, the mobile terminal PS of the location registration request source
a1 waits for the arrival of additional number information from the private branch exchange EXb after transmitting the location registration request, and when the additional number information arrives, stores the additional number in the additional number storage unit 11b of the storage unit 11.
To memorize.

Now, in this state, it is assumed that the user performs a call operation using the telephone directory information in the mobile terminal PSa1 to make a call to, for example, the mobile terminal PSa2 belonging to the home exchange EXa. Then, the mobile terminal PSa1
As shown in FIG. 7, in step 7a, it is recognized that the call is a call using the telephone directory information, and in step 7b, the telephone number corresponding to the registration number of the call partner is stored in the telephone directory information storage unit 11a. read out. In step 7c, the additional number is read from the additional number storage unit 11b.

For example, assume that the telephone number of the mobile terminal PSa2 to be called is "5002" as shown in FIG.
It is also assumed that the additional number for the home exchange EXa is "7-300" as shown in FIG. Then, the mobile terminal PSa1 makes the telephone number “500” in step 7d.
2 is added to the additional number "7-300" to provide a dial number for home call.
"-300-5002" together with the transmission request is sent to the private branch exchange EXb in step 7e.

Therefore, in the private branch exchange EXb, a call is transmitted to the private branch exchange EXa via the dedicated line PL in accordance with the dial signal. In the private branch exchange EXa,
When an outgoing signal arrives from the private branch exchange EXb, the destination dial number "5002" included in the outgoing signal is received.
And transmits an incoming signal to the corresponding mobile terminal PSa2.

Thus, the outgoing connection is made from the mobile terminal PSa1 having moved to the service area of the private branch exchange EXb to the mobile terminal PSa2 of the home private branch exchange EXa. It is assumed that the mobile terminal PSa1 has entered the other party's telephone number using a dial key without using the telephone directory information. Then, in this case, it is determined in step 7a that the calling party is a mobile terminal belonging to the serving private branch exchange EXb, and after all digits of the dial number input by the dial keys are captured in step 7f, It is transmitted to the area private branch exchange EXb.

As described above, in the first embodiment, when the location registration is performed from the mobile terminal PSa1 to the private branch exchange EXb, the private branch exchange EXb performs the registration of the mobile terminal Pb.
It is determined whether or not Sa1 uses another private branch exchange EXa as a home exchange. If this determination is yes, an additional number for transmitting to the home private branch exchange is searched for and a registration request is made. Notify the original mobile terminal PSa1. The mobile terminal PSa1 stores the notified additional number, and when a call is made using the telephone directory information, the mobile terminal PSa1 adds the additional number to the destination telephone number registered in the telephone directory and stores it. It is transmitted together with a call request to the private branch exchange EXb.

Therefore, even if the user of the mobile terminal PSa1 makes a call using the telephone directory information at the office B other than the office A to which the user belongs, this call is made using the same telephone number of the exchange EXb. The incoming call is reliably received at the desired terminal of the home private branch exchange EXa without erroneous incoming calls to the extension terminal. For this reason, the user of the mobile terminal can transmit and communicate with other mobile terminals in the home area without being aware of the location of the mobile terminal at any office. Therefore, the operability of the user is greatly improved as compared with the conventional case where the user has to input the calling number to the home exchange each time.

Further, since an outgoing call is made by adding an additional number to the other party's telephone number in the mobile terminal, the outgoing connection control procedure in the private branch exchange can be simplified, thereby processing load on the exchange for each outgoing call. Can be reduced.

Also, in this embodiment, the private number is notified from the private branch exchange to the mobile terminal at the time of location registration, so that the transmission procedure between the mobile terminal and the private branch exchange can be simplified as compared with the case of notifying each time a call is made. Can be

Further, since each of the outgoing processes is performed by discriminating whether the outgoing call to the home exchange or the outgoing exchange is based on whether or not the outgoing call is made using the telephone number book, the user uses the telephone directory. By selecting whether or not to make a call, the call to the home exchange and the call to the serving exchange can be selected easily and reliably without any special selection designation operation.

(Second Embodiment) In this embodiment, when a mobile terminal belonging to another private branch exchange has performed location registration, a home call mode is selected as a use environment mode for this mobile terminal. A selection is made as to whether or not to select an area transmission mode, and this specification mode is stored. When a call request arrives from a mobile terminal that specifies the home call mode, the call request is determined to be processed by the home switch, and the destination dial number is converted into dial number information for the home switch. This is sent to the home exchange for processing. On the other hand, if a call request arrives from a mobile terminal that has designated the local call mode, the call request is judged to be processed by itself, and the In this case, the user performs the calling process according to the destination dial number.

FIGS. 10 and 11 are block diagrams showing the functional configurations of the control unit 1000 of the mobile terminal and the central control unit 5000 of the private branch exchange according to this embodiment, respectively. The control unit 1000 of the mobile terminal newly has a mode designation control unit 1000a. Mode designation control means 1
000a informs the user when an inquiry about the use environment mode arrives from a private branch exchange described later,
On the other hand, when the user performs a mode designation input, the mode designation information is notified to the private branch exchange.

The central control unit 5000 of the private branch exchange includes a location registration reception control means 5000a and a transmission reception control means 50.
00b and a service reception control unit 5000c are newly provided.

The location registration reception control means 5000a performs well-known location registration reception processing when a location registration request arrives from a mobile terminal, determines whether the mobile terminal belongs to itself, and determines whether the mobile terminal belongs to itself. When the mobile terminal belongs to the private branch exchange, the requesting mobile terminal is inquired about the use environment mode. When the mode designation information arrives from the mobile terminal, the communication environment setting memory unit 600 of the memory 6000 associates this information with the mobile terminal.
0b.

When a call request arrives from the mobile terminal, the call reception control means 5000b determines whether the use environment mode of the mobile terminal is the home call mode or the located call mode in the communication environment setting memory unit 6000b. Judgment is made on the basis of the stored information. In the case of the home transmission mode, it is judged that this transmission should be processed by the home exchange, and an additional number for transmission to the home exchange is retrieved from the exchange call number recording memory section 6000a. The additional number is added to the destination dial number sent from the mobile terminal and sent to the home exchange. On the other hand, in the case where the in-area transmission mode is set, it is determined that the transmission should be processed by itself, and the reception processing is performed based on the destination dial number sent from the mobile terminal.

When the service request special number arrives from the mobile terminal in which the home transmission mode is set, the service reception control means 5000c converts the service request special number into a special number corresponding to itself, and responds to the converted special number. The service providing process is performed on the requesting mobile terminal.

Next, the operation of the system configured as described above will be described. First, the location registration operation will be described.
When a location registration request arrives from the mobile terminal, the private branch exchange first determines in step 14a whether or not this is the first location registration request from the mobile terminal, as shown in FIG.
If this is the first time, the process proceeds to step 14b, where the position of the calling terminal is searched, and subsequently, in step 14c, it is determined whether the mobile terminal is a mobile terminal belonging to itself. If it is a mobile terminal belonging to itself, step 14d
Then, normal location registration reception processing is performed here. On the other hand, if the requesting mobile terminal belongs to another private branch exchange, the process proceeds to step 14e, where processing for setting the use environment of the mobile terminal is performed.

That is, the private branch exchange transmits information for inquiring to the mobile terminal of the registration request source whether the home transmission mode or the area transmission mode is desired as the use environment mode. This information is displayed on the display at the mobile terminal. On the other hand, when the user of the mobile terminal specifies, for example, the home transmission mode, the mobile terminal returns a home mode specification signal to the private branch exchange. Upon receiving this, the private branch exchange sets the use environment mode to “home” as shown in FIG. 13, for example, in association with the mobile terminal of the registration source. Then, the process shifts to step 14f to execute a location registration accepting process for the mobile terminal. When the user of the mobile terminal designates the location transmission mode as the usage environment mode, "location" is set in the communication environment setting memory unit 6000b of the private branch exchange as shown in FIG.

The usage environment mode set as described above is maintained for a preset time (for example, one week).
Therefore, for example, if the mobile terminal that has performed location registration once goes out of the service area and then returns to the service area again on that day and makes a location registration request, the private branch exchange proceeds from step 14a to step 14a. The processing shifts to 14g, where the environment setting processing is omitted and the position registration receiving processing is executed.

Now, it is assumed that a call request arrives from the mobile terminal whose location has been registered in this way. Then, the private branch exchange first accesses the location registration memory in step 15a as shown in FIG. 15 to determine whether the originating mobile terminal is a mobile terminal belonging to itself.
The determination is made in 5b. If the mobile terminal belongs to itself, the process proceeds to step 15f, where the mobile terminal receives an incoming call according to the dial number sent from the mobile terminal.

On the other hand, if the originating mobile terminal is a mobile terminal that does not belong to itself, the process proceeds to step 15c, where the communication environment setting memory unit 6000b is searched and the environment mode of the mobile terminal is determined. It is determined whether the home transmission mode is set or the located transmission mode is set (step 15d). If it is determined that the home calling mode has been set, the process proceeds to step 15e, where the exchange call number recording memory unit 6000a
Reads the calling number of the home exchange to which the originating mobile terminal belongs, adds the calling number to the destination dial number sent from the mobile terminal, and sends the dialed number to the home exchange via a dedicated line. . Therefore, the exchange process in this case is performed in the home exchange, and as a result, even if the mobile terminal inputs only the dial number of another mobile terminal belonging to the home exchange, the mobile terminal of the serving exchange may erroneously receive a call. And the call is reliably received at the mobile terminal of the home exchange.

If the in-area transmission mode is set for the mobile terminal of the transmission source, step 15d
Then, the process proceeds to step 15g, where the mobile terminal belonging to the mobile terminal receives the call according to the destination dial number sent from the mobile terminal.

On the other hand, it is assumed that a special number for requesting a service has arrived from the mobile terminal. Then, the private branch exchange is
As shown in (1), first, by accessing the location registration memory in step 16a, it is determined in step 16b whether or not the originating mobile terminal is a mobile terminal belonging to itself. If the mobile terminal belongs to the mobile terminal, the process proceeds to step 16i, where a service process corresponding to the special number sent from the mobile terminal is executed.

On the other hand, if the originating mobile terminal is a mobile terminal that does not belong to itself, the process proceeds to step 16c, where the communication environment setting memory unit 6000b is searched to find the environment mode of the mobile terminal. It is determined whether the home transmission mode is set or the located transmission mode is set (step 16d). If the home calling mode has been set, the process proceeds to step 16e, where a special number is inquired to the home exchange of the mobile terminal via a dedicated line. When the information indicating the service content is returned from the home exchange in response to the inquiry of the special number, the private branch exchange determines from the returned information whether or not the requested service is a service that can be provided by itself.
6f, if the service can be provided, step 1
In step 6g, the special number transmitted from the requesting mobile terminal is converted into a special number used by itself, and a process for providing a service corresponding to the special number is executed.

If the service cannot be provided, the process proceeds to step 16h, where a rejection message is transmitted to the requesting mobile terminal and displayed. As the rejection message displayed at this time, for example, "the service cannot be used in this exchange."

If the use environment mode of the mobile terminal requesting the service is set to the in-location calling mode, the private branch exchange performs steps 16d to 16j.
Then, a process for providing a service corresponding to the special number sent from the mobile terminal is executed.

As described above, in this embodiment, when a location registration request arrives from a mobile terminal belonging to another private branch exchange, an inquiry about the use environment mode is made to this mobile terminal, and the mode specified by the mobile terminal is set. Is stored. When a call request arrives from a mobile terminal in which the home call mode is set, the other party's dial number is converted into a dial number for calling the home private branch exchange, sent to the home private branch exchange, and received. On the other hand, when an outgoing call request arrives from a mobile terminal in which the located outgoing call mode is set, incoming call processing is executed as it is according to the other party's dial number.

Therefore, even if the user of the mobile terminal makes a call at an office other than the office to which he / she belongs, this call is made without erroneous incoming calls to the extension terminal having the same telephone number of the local exchange. The call is reliably received at the desired terminal of the private branch exchange. For this reason, the user of the mobile terminal can transmit and communicate with another mobile terminal in the home area without being aware of its location at all offices. Therefore, the operability of the user is greatly improved as compared with the conventional case where the user has to input the calling number to the home exchange each time.

Further, in this embodiment, since the private branch exchange performs the conversion of the dial number, it is not necessary to notify the mobile terminal of the calling number of the exchange, and it is not necessary for the mobile terminal to control the conversion of the dial number. Thereby, the processing of the mobile terminal can be simplified.

Further, according to the present embodiment, by providing the service special number conversion function, even when different private numbers are assigned to the same service between private branch exchanges.
The service requested by the mobile terminal can be executed correctly.

The present invention is not limited to the above embodiments. For example, in the first embodiment,
Whether the call is forwarded to the home exchange and processed by the visited exchange is distinguished between the case where the call is made using the telephone directory information and the case where the call is made by dial key input. However, means for the user to select and input the home transmission mode and the located transmission mode to the mobile terminal,
Means for storing and holding the designated input mode, and when a call operation is performed, it is determined whether or not to convert the dialed number in accordance with the storage mode to perform the call processing. You may. Further, the mode designation may be performed at the time of location registration, and may be changed, for example, at the time of calling after the location registration, if necessary.

Further, in the first embodiment, only the processing for the outgoing request has been described, but the processing for the service request may be similarly performed. This is because, for example, at the time of location registration, service special number conversion data is transferred from the private branch exchange to the mobile terminal and stored, and when the special number is input, the special number is converted in the mobile terminal and then transmitted to the private branch exchange. It can be realized by a configuration such that

Further, in each of the above-described embodiments, a case has been described in which private branch exchanges installed in each business office are targeted, but exchanges of a plurality of different mobile communication carriers may be targeted.

In addition, the configurations of the private branch exchange and the mobile terminal, the control procedures of the location registration reception control, the transmission reception control and the service reception control, and the contents thereof are variously modified without departing from the gist of the present invention. it can.

[0080]

The mobile communication system according to the present invention comprises a plurality of exchanges connected to each other via a communication line, and a plurality of mobile terminals registered in advance in any of these exchanges as belonging terminals. And, when a location registration request arrives from the mobile terminal, the switching unit determines whether or not the mobile terminal is a mobile terminal belonging to the mobile terminal. Notifying means for notifying the mobile terminal of the location registration request source of exchange originating dial information for originating a call to the home exchange to which the mobile terminal belongs, if the mobile terminal belongs to the mobile terminal. Storage means for storing an exchange originating number notified from the exchange at the time of the location registration request, and, when an originating operation is performed, the destination dial information to the storage means. Transmission control means for converting the dialing information stored in the exchange to dialing information for transmitting to the home exchange based on the stored dialing information, and transmitting the converted dialing information to the exchange in which the terminal is registered. Therefore, it is possible to provide a mobile communication system and a switching device for enabling a user to receive an incoming call at the same terminal by the same terminal operation as in the home area, regardless of the service area.

[Brief description of the drawings]

FIG. 1 is a diagram showing a schematic configuration of a mobile communication system according to a first embodiment of the present invention.

FIG. 2 shows mobile terminals PSa1-PSaj and PSb1-P.
FIG. 2 is a circuit block diagram showing a configuration of Sbk.

FIG. 3 is a circuit block diagram showing a configuration of a private branch exchange EXa.

FIG. 4 is a diagram showing a configuration of a control unit 10 and a storage unit 11 of the mobile terminal according to the first embodiment of the present invention.

FIG. 5 is a private branch exchange E according to the first embodiment of the present invention.
The figure which shows the structure of the central control part 500 of Xa, EXb.

FIG. 6 is a private branch exchange E according to the first embodiment of the present invention.
9 is a flowchart showing position registration control performed by the central control unit 500 in Xa and EXb.

FIG. 7 is a flowchart when a call is transmitted from the mobile terminal using the telephone directory function in the first embodiment of the present invention.

FIG. 8 is a diagram showing an example of a calling number to the private branch exchange EXa.

FIG. 9 is a diagram showing an example of a call number transmitted from the mobile terminal to the private branch exchange EXb.

FIG. 10 is a diagram showing a configuration of a control unit 1000 of a mobile terminal according to the second embodiment of the present invention.

FIG. 11 shows a central control unit 5000 and a memory 60 of the private branch exchanges EXa and EXb according to the second embodiment of the present invention.
FIG.

FIG. 12 shows a switch call number recording memory unit 600a.
The figure which shows the example of the storage format in FIG.

FIG. 13 is a diagram showing an example of a storage format in a communication environment setting memory unit 600b.

FIG. 14 is a flowchart showing location registration control performed in the central control unit 5000 in the private branch exchanges EXa and EXb according to the second embodiment of the present invention.

FIG. 15 is a flowchart showing an outgoing call process performed by the central control unit 5000 in the private branch exchanges EXa and EXb according to the second embodiment of the present invention.

FIG. 16 is a flowchart illustrating a service providing process performed by the central control unit 5000 in the private branch exchanges EXa and EXb according to the second embodiment of the present invention.

FIG. 17 is a conceptual diagram used to show a problem of a conventional technique.

[Explanation of symbols]

Reference Signs List 6 radio section 61 antenna 62 high frequency switch (SW) 63 receiving section 64 frequency synthesizer 65 transmitting section 66 received electric field strength detecting section (RSSI) 7 modem section 71 demodulating section 72 modulating section 8 TDMA section 81 TDMA decoding section 82 TDMA encoding section 9 Talk section 91 Adapted difference PCM codec (ADPCM-CO
DEC) 92 PCM codec (PCM-CODEC) 10, 1000 Control unit 10a Location registration control unit 10b Additional number storage control unit 10c Dial conversion transmission control unit 11 Storage unit 11a Phonebook information storage unit 11b Additional number storage unit 101 key input unit 102 LCD drive circuit 103 liquid crystal display (LCD) 100 exchange circuit unit 200 exchange control unit 300 extension interface units 301 to 30n extension interface circuit 400 external line interface unit 401 ... office line interface circuit 402 ... dedicated line interface circuit 500, 5000 ... central control unit 500a ... location registration reception control means 500b ... additional number notification control means 5000a ... location registration reception control means 5000b ... transmission reception control means 5000c ... service reception control Means 600,6000 ... memory 6000a ... exchange call number recording memory section 6000b ... communication environment setting memory section

Claims (7)

[Claims] 1. A mobile telephone comprising: a plurality of exchanges connected to each other via a communication line; and a plurality of mobile terminals registered in advance in any of these exchanges as belonging terminals. When a location registration request arrives, a determination unit that determines whether the mobile terminal is a mobile terminal belonging to the mobile terminal.If the determination unit determines that the mobile terminal is not a mobile terminal belonging to the mobile terminal, Notifying means for notifying the mobile terminal of the location registration request source of exchange originating dial information for calling the home exchange to which the mobile terminal belongs, the mobile terminal being notified from the exchange at the time of the location registration request. Storage means for storing the selected exchange originating number, and exchange originating dial information stored in said storage means when the dialing operation is performed. Transmission communication means for converting the information into dial information for transmitting to the home exchange based on the information, and transmitting the converted dial information to the exchange in which the terminal is registered. system. 2. The mobile terminal according to claim 1, further comprising: a unit configured to determine whether or not the outgoing operation is an outgoing operation using the telephone directory information when the telephone directory information for the home exchange is stored; If it is determined that the call is an outgoing call using the phonebook information, the other party's dialing information must be converted to dialing information for sending to the home exchange and sent to the local exchange. 2. The mobile communication system according to claim 1, wherein, if determined, the other party's dial information is transmitted as it is to the serving exchange. 3. A mobile communication system comprising a plurality of switching devices connected to each other via a communication line, and a plurality of mobile terminals registered in advance as terminals belonging to any of the switching devices. In the switching device, when a location registration request arrives from the mobile terminal, a determination unit that determines whether the mobile terminal is a mobile terminal belonging to itself, based on a determination result of the determination unit, Mode setting means for setting the use environment mode when the mobile terminal uses its own device to one of the home transmission mode and the located transmission mode and storing the same, and when a transmission request arrives from the mobile terminal, Determining the usage environment mode set for the mobile terminal based on the information stored in the mode setting means. Means for converting destination dial information sent from the terminal into dial information for transmitting to the home exchange to which the mobile terminal belongs, and sending the converted dial information to the home exchange via the communication line. An exchange device characterized by the above. 4. The mode setting means, when a location registration request arrives from a mobile terminal that does not belong to the own device, sets the use environment mode to the home transmission mode or sets the location transmission mode to the mobile terminal. 4. The switching device according to claim 3, wherein an inquiry is made as to whether or not to do so, and the use environment mode is set according to an instruction of the mobile terminal in response to the inquiry. 5. The mode setting means stores and retains the set use environment mode for a predetermined period, and when a location registration request arrives from a mobile terminal not belonging to the own device, the use environment mode is associated with the mobile terminal. 5. The switching device according to claim 4, wherein it is determined whether or not the setting has been completed, and if the setting has been completed, the inquiry about the usage environment mode to the mobile terminal is omitted. 6. When a predetermined service request using a special number arrives from a mobile terminal that does not belong to the own apparatus, the special number of the service request is converted into a special number corresponding to the own apparatus, and the converted special number corresponds to the special number. 4. The switching device according to claim 3, further comprising service provision control means for providing a service to the requesting mobile terminal. 7. The service providing control means, when converting a special number of a service request received from a mobile terminal, determines whether or not the own device has a function of providing the service, and has the function. 7. The switching device according to claim 6, wherein when there is no such information, the requesting mobile terminal is notified of such information.