JPH09247741A - Mobile communication network system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To conduct proper roaming at all times even when plural private branch exchanges in a private network make independently attribute setting to mobile terminal equipments. SOLUTION: When a mobile terminal equipment moves to a different private zone in a private network and makes a position registration request to a private branch exchange being a moving destination, the visitor private branch exchange discriminates a home private branch exchange of the mobile terminal equipment from a mobile terminal equipment detection table 151 and makes inquiry about attribute information of this home private branch exchange. When the home private branch exchange returns the attribute information of the mobile terminal equipment in reply with the inquiry, the visitor private branch exchange converts the attribute information for the home private branch exchange into the attribute information of the visitor private branch exchange by using an attribute conversion table 152 and executes connection control relating to the mobile terminal equipment based on the attribute information afterward.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile communication network system that enables a user to communicate using a mobile terminal in a private network constructed in a company, for example.

[0002]

2. Description of the Related Art In recent years, for example, PHS (Personal Handyphon) for business establishments has become one of the private networks constructed in companies and schools.
e System), which includes a mobile communication system. This type of system generally has a plurality of base stations distributed in a premises such as a factory, an office, or a campus, and a mobile terminal is selectively connected to the private branch exchange through these base stations, and further from this private branch exchange. By connecting to a public network via a subscriber line or connecting to another private branch exchange in a private network via a leased line, it is possible to communicate with a desired partner communication terminal. . By using such a system, it is possible to freely perform in-company communication at any place on the premises.

By the way, recently, in a mobile communication network system of this type, even if a mobile terminal moves from a premises such as a factory or an office to which the mobile terminal originally belongs to a premises of another factory or office, the mobile terminal is used as it is for communication. Attempts have been made to make it possible. In order to realize this communication service, it is necessary for the private network to have a roaming function for mobile terminals. The roaming function registers the location of the destination private branch exchange (visitor private branch exchange) when the mobile terminal moves from its own premises to another premises, and from this visitor private branch exchange via a dedicated line. The location registration information is transferred to a private branch exchange (home private branch exchange) in which the mobile terminal is originally housed, and thereafter, the home private branch exchange controls the incoming / outgoing calls of the mobile terminal via the visitor private branch exchange. .

However, when roaming is performed in a mobile communication network system, it is necessary to solve the following problems. That is, a tenant may be set in the private network. The tenant is a closed group provided for each different user in the private network, and is set for each company or division when the same private branch exchange is shared by different companies or divisions, for example. Each tenant is given a number called a tenant number for identifying the tenant, and the mobile terminal needs to belong to one of the tenants even at the destination. Therefore, when roaming, the tenant number is notified between the visitor private branch exchange and the home private branch exchange.
This requires the mobile terminal to belong to an appropriate tenant.

However, the private network is generally highly independent within each premises, and often the tenant number as well as the service content for each tenant is arbitrarily set for each private branch exchange. Therefore, if the tenant number is simply notified, the mobile terminal may be accommodated by a tenant of a completely different company or department in the destination premises. If the mobile terminal is accommodated in an inappropriate tenant in this manner, it may cause an inconvenience such as illegal line use or billing due to a difference in the numbering plan or service provided for each tenant, which is extremely undesirable.

[0006]

As described above, when an attempt is made to roam a mobile terminal between a plurality of private branch exchanges in a private network, each private branch exchange sets up a plurality of tenants independently of each other. If so, the mobile terminal may be accommodated in an inappropriate tenant, which may result in illegal use of the line or billing, which is extremely undesirable.

The present invention has been made in view of the above circumstances, and an object thereof is always appropriate even when a plurality of private branch exchanges in a private network independently set attributes for mobile terminals. It is to provide a mobile communication network system capable of various roaming.

[0008]

In order to achieve the above object, in a mobile communication network system according to the first invention, when a location registration request arrives from a mobile terminal, a destination to which the location registration request is received. Inquiries about the attribute information from the private branch exchange to the original private branch exchange to which the mobile terminal originally belongs via the communication line, and in response to this inquiry, from the private branch exchange of the moving origin to the private branch exchange of the destination of the inquiry. The attribute information of the corresponding mobile terminal is notified. Then, in the destination private branch exchange, the attribute information notified is converted into attribute information suitable for self-use based on the attribute information storage means provided in advance, and thereafter, based on the converted attribute information, The communication control relating to the mobile terminal that has made the location registration request is performed.

Further, in the mobile communication network system according to the second invention, when a location registration request arrives from a mobile terminal, the source of the mobile terminal to which the mobile terminal originally belongs from the destination private branch exchange that receives the location registration request. Inquires about the attribute information of the private branch exchange via the communication line. In response to this inquiry, in the private branch exchange of the moving source, the attribute information of the corresponding mobile terminal is converted into attribute information suitable for use in the private branch exchange of the moving destination based on the attribute information storage means provided in advance, This converted attribute information is notified to the destination private branch exchange, and the destination private branch exchange then performs communication control relating to the mobile terminal that has made the location registration request based on the notified attribute information. It is the one.

Further, in the mobile communication network system according to the third invention, attribute information suitable for each private branch exchange when each mobile terminal belonging to another private branch exchange is used in its own private branch is provided for the mobile terminal. A stored attribute information storage means is provided. When a location registration request arrives from the mobile terminal, the private branch exchange that receives the location registration request is suitable for using the mobile terminal that has performed the location registration in its own premises from the attribute information storage means. The attribute information is read out, and thereafter, the communication control relating to the mobile terminal that has made the location registration request is performed based on the read out attribute information.

Further, a mobile communication network system according to a fourth aspect of the present invention comprises a control station connected to each of a plurality of private branch exchanges, and each mobile terminal accommodated in the system is used in each of the private branch exchanges at the control station. Attribute information storage means is provided for storing each attribute information suitable for each case corresponding to each mobile terminal. When a location registration request arrives from the mobile terminal, the private branch exchange that has received the location registration request inquires of the control station about the attribute information, and the control station sends the appropriate attribute information from the attribute information storage means. The private branch exchange reads out and notifies the private branch exchange of the inquiry source, and the private branch exchange thereafter performs communication control relating to the mobile terminal which has made the location registration request, based on the notified attribute information.

Therefore, according to these inventions, when the mobile terminal makes a location registration request to the destination private branch exchange, in response to this request, an inquiry is made to the source private branch exchange or the control station, and the destination The attribute information storage means provided in the private branch exchange itself is accessed, so that the attribute information suitable for using the mobile terminal in the destination private branch exchange is set. Therefore, for example, even when the private branch exchanges have different tenant numbers representing common tenants, the mobile terminal is accommodated in an appropriate tenant in the destination premises where the mobile terminal should be accommodated.

That is, appropriate roaming can always be performed without being affected by the difference in tenant settings between the private branch exchanges. Therefore, it is possible to surely prevent the trouble that the mobile terminal is accommodated in an inappropriate tenant at the moving destination, and as a result, the illegal use of the line and the charging are performed.

Further, each of the above inventions is characterized in that the attribute information includes at least identification information of a tenant to which the mobile terminal belongs and connection restriction information given to the mobile terminal by the tenant. By doing so, it is of course possible to accommodate the mobile terminal in an appropriate tenant at the destination, and in the accommodated tenant, the connection form of the mobile terminal based on the private branch exchange or the connection restriction information specific to the tenant. Can be controlled. That is, for each mobile terminal moving in the private network,
It becomes possible to perform more detailed connection control according to the connection regulation conditions peculiar to each campus.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION

(First Embodiment) In this embodiment, an attribute conversion table of a mobile terminal is provided in a visitor private branch exchange of a moving destination, and when the mobile terminal moves from a premises to which the mobile terminal originally belongs to another premises,
This destination private branch exchange inquires from the source home private branch exchange about the original attribute information of the mobile terminal, and in response to this inquiry, the attribute information notified from the source home private branch exchange is used by using the conversion table. The attribute information is converted into attribute information suitable for the visitor private branch exchange of the destination, and thereafter the connection control of the mobile terminal is performed based on this attribute information.

FIG. 1 is a schematic configuration diagram of a mobile communication network system according to the first embodiment. This system consists of three independent indoor communication areas E1, E2
Have E3. These premises communication areas E1, E2, E
3 corresponds to each independent factory or office screw.

In each of the local communication areas E1, E2, E3,
Private branch exchange (PBX) EX as the core equipment
1, EX2, EX3 are installed. These private branch exchanges EX1, EX2, EX3 are dedicated lines SL12, SL.
13 are connected to each other, and station lines PL1 and PL
2, PL3 is connected to the public network NW. In addition, a plurality of base stations CS11 to CS1j, CS21 to CS2m and CS3 are respectively provided in the local communication areas E1, E2 and E3.
1 to CS3n are distributed and arranged. These base stations C
S11-CS1k, CS21-CS2m, CS31-C
S3n are private branch exchanges EX1, EX2, EX3, respectively.
It is connected to the extension of the
Mobile terminals PS11 to PS13, PS21 to PS23, PS31 such as mobile phones and personal digital assistants existing in 3
~ PS34 is connected via a wireless channel.

FIG. 2 shows the private branch exchanges EX1, EX2.
It is a block diagram which shows the structure of EX3. Since the private branch exchanges EX1, EX2, EX3 have the same configuration, only the private branch exchange EX1 is shown in the figure as a representative.

The private branch exchange EX1 includes an exchange circuit 100 including a time switch and a plurality of office line interfaces (N).
WI / F) 111 to 11i, a plurality of base station interfaces (CSI / F) 121 to 12j, and a plurality of dedicated line interfaces (SLI / F) 131 to 132,
Further, a central control unit (CC) 140 and a storage unit (MEM)
And 150. The exchange circuit 100, the interfaces, and the central controller 140 are connected via a data highway.

The station line interfaces 111 to 11i are respectively connected to the public network NW via the station line PL1, and interface functions with respect to the station line such as detection of an incoming signal from the public network NW, opening / closing of a DC loop, and transmission of a dial signal. Have.

Base stations CS11 to CS1j are connected to the base station interfaces 121 to 12j via extension lines, respectively. The base station interfaces 121 to 12j are connected to the base stations CS11 to CS1j in response to an incoming call to an extension line or an extension line.
An incoming call control signal to the base stations CS11 to C
It has a base station interface function of notifying the central control unit 140 when a call control signal arrives from S1j.

The private line interfaces 131 and 132 are connected to other private branch exchanges EX2 and EX3 via private lines SL12 and SL13, respectively, and these private branch exchanges EX are also connected.
2 and EX3 have interface functions related to various communications.

By the way, the central control unit 140 and the storage unit 150 have the following functions. FIG. 3 is a block diagram showing the functional configuration. In the storage unit 150,
Mobile terminal detection table 151 and attribute conversion table 15
2 and are provided. The mobile terminal detection table 151 stores the numbers of the home private branch exchanges of all the mobile terminals permitted to move in the system in correspondence with the mobile terminals, and determines the affiliation of the mobile terminal which has issued the location registration request. Used for.

The attribute conversion table 152 comprises a tenant number conversion table and a connection regulation class conversion table. The tenant number conversion table is used for other private branch exchanges EX.
2, the number of the same tenant set in its own private branch exchange EX1 is stored in association with the number of each tenant set in EX3.
2, used when converting the belonging tenant number of the mobile terminal notified from EX3 to the tenant number in its own private branch exchange EX1.

The connection regulation class conversion table stores the connection regulation class defined in its own private branch exchange EX1 in association with each connection regulation class defined in the other private branch exchanges EX2 and EX3. The private branch exchanges EX2 and EX3 are used to convert the connection restriction class assigned to the mobile terminal to the connection restriction class assigned to the private branch exchange EX1.

The central control unit 140 uses its own private branch exchange E.
In addition to various normal control functions relating to the mobile terminal belonging to X1, in addition to the terminal position detecting means 141 as shown in FIG.
Attribute inquiry control means 142 and attribute conversion means 143
And a terminal connection control means 144.

When the location registration request arrives from the mobile terminal, the terminal location detecting means 141 accesses the mobile terminal detection table 151 to detect the number of the private branch exchange to which the mobile terminal belongs.

Based on the detection result of the terminal position detecting means 141, the attribute inquiry control means 142 makes an inquiry about the attribute information to the home private branch exchange to which the mobile terminal belongs via a leased line, and responds to this inquiry with the home. The attribute information, that is, the tenant number and the connection regulation class in the home private branch exchange of the mobile terminal, which is sent from the private branch exchange via a dedicated line, is received.

The attribute information conversion means 143 uses its tenant number conversion table and connection restriction class conversion table for the tenant number and connection restriction class sent from the home private branch exchange, respectively, to obtain its own private branch exchange (visitor private branch exchange). ) Convert to the corresponding tenant number and connection control class.

The terminal connection control means 144 determines the other private branch exchanges EX2, E based on the tenant number and connection restriction class converted by the attribute information conversion means 143.
Performs various connection controls related to the mobile terminal moving from X3.

Next, a roaming operation performed in the system configured as described above will be described. Now, for example, tenants A and B are set in the private branch exchanges EX1, EX2, and EX3, and the tenant numbers of the tenants A and B are set to the private branch exchanges EX1 and EX, respectively.
2 and EX3 are defined as shown in FIG. In this case, the storage unit 150 of the private branch exchange EX3
As the attribute conversion table 152, a tenant number table having the contents as shown in FIG. 5A and a connection regulation class conversion table as shown in FIG. 5B are stored therein.

In FIG. 5 (b), the connection regulation class "super special shell" is a class capable of making a call to all destinations including international calls, and "special shell" is a domestic class excluding international calls. The classes that can be sent to all the destinations of each of the above are shown. In addition, "Kou" is a class that can even make a local call and "Otsu" is a class that can only make a call to the private network. It represents.

In this state, it is assumed that the mobile terminal PS13 belonging to the premises E1 of FIG. 1 moves to the premises E3 due to a business trip or the like and transmits a position registration request within the area.
Then, this location registration request is transmitted to the base stations CS31 to CS.
Private branch exchange E received by any of the base stations 3n
It is transferred to X3.

When the position registration request is transferred, the private branch exchange EX3 controls the attribute setting of the mobile terminal PS13 by the central control unit 140 as follows. FIG. 6 is a flowchart showing the control procedure and control contents.

That is, first, in step S61,
The mobile terminal detection table is accessed by using the mobile terminal number included in the position registration request as a key, and the mobile terminal PS is accessed.
The home private branch exchange to which 13 originally belongs is identified.
Then, if the mobile terminal PS13 belongs to other than itself as described above, the location registration request is determined to be a roaming request. Next, in step S62, the visitor private branch exchange EX3 transmits the inquiry information of the attribute information to the home private branch exchange EX1 through the private line SL13 (SETUP), as shown in FIG.

On the other hand, when the home private branch exchange EX1 receives the inquiry information, it returns the response CALLPROC to the SETUP and then accesses the mobile terminal detection table provided in advance in its own storage unit. Then, the attribute information assigned to the mobile terminal PS13 is read. The attribute information includes the number of the tenant to which the mobile terminal PS13 belongs and the connection regulation class given to the mobile terminal PS13 as described above. The home private branch exchange EX1 sends this attribute information to the visitor private branch exchange EX3, which is the inquiry source, through the private line SL13 as shown in FIG.
N).

The visitor private branch exchange EX3 monitors the return of the attribute information from the home private branch exchange EX1 in step S63 after transmitting the above-mentioned ISE matching information. When the attribute information is received, the process proceeds to step S64. Then, the attribute conversion table 152 in the storage unit 150 is accessed to convert the attribute information of the mobile terminal PS13 into attribute information suitable for the visitor private branch exchange EX3.

For example, if the tenant number T1 is sent from the home private branch exchange EX1, this tenant number T1 is converted into the tenant number T1 by the tenant number conversion table shown in FIG. 5A. Similarly, if the tenant number T2 is sent from the home private branch exchange EX1, this tenant number T2 is converted into the tenant number T3. Further, if the home private branch exchange EX1 sends the connection restriction class "Chokokko" together with the tenant number T1, this connection restriction class is "connection restriction class" according to the connection restriction class conversion table shown in FIG. 5B. Converted to "Super Special". Similarly, if the home private branch exchange EX1 sends the connection restriction class "Tokuko", the connection restriction class is converted to the connection restriction class "A".

Upon completion of these conversions, the visitor private branch exchange EX3 proceeds to step S65 and sets the converted tenant number and connection regulation class in association with the mobile terminal PS13 which has issued the location registration request.
Therefore, when an incoming / outgoing call related to the mobile terminal PS13 occurs thereafter, the visitor private branch exchange EX3 performs connection control according to the set tenant number and connection restriction class.

When the attribute information is not returned from the home private branch exchange EX1 within a certain time after the inquiry information is sent, or when the attribute information corresponding to the attribute information is not stored in the attribute conversion table, the attribute information is not converted. If not, the visitor private branch exchange EX3 proceeds to step S66 to set a default value for the mobile terminal PS13 or perform control to reject the location registration request.

As described above, in this embodiment, when the mobile terminal moves to a different premises in the private network and makes a location registration request to the destination private branch exchange, this visitor private branch exchange will be the home private branch of the mobile terminal. The exchange is identified by the mobile terminal detection table 151, and the home private branch exchange is inquired about the attribute information. Then, when the home private branch exchange returns the attribute information of the mobile terminal in response to this inquiry, the visitor private branch exchange converts the attribute information for this home private branch exchange into the attribute information for the visitor private branch exchange using the attribute conversion table 152, After that, the connection control relating to the mobile terminal is executed based on this attribute information.

Therefore, according to this embodiment, even if the tenant numbers are set differently among the private branch exchanges EX1, EX2, EX3 in the private network, the mobile terminal is accommodated by an appropriate tenant in the destination premises. This prevents a mobile terminal moving from another premises from illegally using the line or improperly charging the mobile terminal.

In addition, the connection restriction class is included in the attribute information,
Since this connection restriction class is converted and set by the visitor private branch exchange, connection control suitable for the circumstances can be performed for the mobile terminal for each premises.

(Second Embodiment) In this embodiment, the attribute conversion table of the mobile terminal is provided in the home private branch exchange to which the mobile terminal originally belongs, and the mobile terminal moves from the home private branch exchange to the other private branch exchange. In this case, the visited private branch exchange makes an inquiry to the home private branch exchange, and in response to this inquiry, the home private branch exchange uses the attribute conversion table to apply the attribute information originally possessed by the mobile terminal to the visitor private branch exchange. It is converted into attribute information and notified to the visitor private branch exchange, and thereafter the visitor private branch exchange performs connection control of the mobile terminal based on the notified attribute information.

FIG. 8 shows an example of the attribute conversion table provided in the storage unit of the home private branch exchange in the system according to the second embodiment, where (a) is the tenant number conversion table and (b) is the same. ) Indicates a connection regulation class conversion table.

Next, the roaming operation of the system according to this embodiment will be described. In the present embodiment as well, the configuration of FIG. 1 described in the first embodiment will be described as an example. Now, the mobile terminal PS34 that temporarily belongs to the campus E3
It is assumed that the user moves to another premises E1 due to a business trip or the like and transmits a position registration request in the area. Then, the location registration request is received by any one of the base stations CS11 to CS1k and transferred to the private branch exchange EX1.

When the location registration request is transferred, the private branch exchange EX1 accesses the mobile terminal detection table using the mobile terminal number included in the location registration request as a key, and the home premises to which the mobile terminal PS34 originally belongs. Identify the switch. Then, if the mobile terminal PS34 belongs to other than itself as described above, the location registration request is determined to be a roaming request. Visitor Private Branch Exchange E
X1 then transmits inquiry information of the attribute information to the home private branch exchange EX3 via the private line SL13.

On the other hand, when the home private branch exchange EX3 receives the inquiry information, after returning a response to the inquiry, the central control unit 140 controls the attribute conversion notification of the mobile terminal PS34 as follows.

That is, first, the visitor private branch exchange EX.
The mobile terminal detection table is accessed based on the inquiry information from No. 1, and the attribute information in the home private branch exchange EX3 of the corresponding mobile terminal PS34 is determined by this. Then, the attribute conversion table shown in FIG. 8 is accessed to convert the attribute information into attribute information suitable for the visitor private branch exchange EX1. Then, the converted attribute information is notified to the visitor private branch exchange EX1 via the private line SL13.

The visitor private branch exchange EX1 sets the conversion attribute information notified from the home private branch exchange EX3 for control of the mobile terminal PS34, and thereafter executes the connection regulation control relating to the mobile terminal PS34 based on this information. To do.

Therefore, also in this embodiment, the mobile terminal is accommodated in an appropriate tenant in the visitor private branch exchange, and the connection control is performed in this tenant in accordance with the connection regulation class predetermined according to the operating conditions.

(Third Embodiment) In this embodiment, in each private branch exchange in the private network, one or more roaming station numbers are set in addition to the tenant number for each tenant, and the roaming station number is supported. Is provided with an attribute conversion table that stores the tenant number and connection restriction class of each private branch exchange. Then, when the location registration request including the roaming station number arrives from the mobile terminal, the visitor private branch exchange accesses the attribute conversion table by using the roaming station number as a key to obtain the attribute information to be used in the visitor private branch exchange. Select and set
Thereafter, the connection control relating to the mobile terminal is executed based on this attribute information.

FIG. 10 shows an example of the tenant configuration of the system according to this embodiment and the tenant numbers and roaming numbers assigned by the private branch exchanges EX1, EX2, and EX3 to the tenants A and B, respectively.
Corresponding to this tenant configuration, each private branch exchange EX1, E
The storage unit 150 of X2, EX3 is provided with an attribute conversion table that stores the tenant numbers and connection restriction classes of the private branch exchanges EX1, EX2, EX3 corresponding to the roaming station numbers. FIG. 11 shows an example of the configuration.

Next, the roaming operation of the above system will be described. The system shown in FIG. 1 will be described here as an example. A mobile terminal P that belongs to the premises E3 now
It is assumed that S31 moves to another premises E2 and transmits a location registration request including its own roaming station number in the area. Then, the location registration request is sent to the base stations CS21 to CS21.
It is received by one of the base stations in CS2m and transferred to the private branch exchange EX2.

When the location registration request is transferred, the private branch exchange EX2 controls the attribute setting of the mobile terminal PS31 by the central control unit 140 as follows. FIG. 9 is a flowchart showing the control procedure and control contents.

That is, first, in step S91,
The mobile terminal detection table is accessed using the roaming station number included in the location registration request as a key, and the home private branch exchange to which the mobile terminal PS31 originally belongs is identified. Then, if the mobile terminal PS31 belongs to other than itself as described above, the location registration request is determined to be a roaming request.

Then, in step S92, the visitor private branch exchange EX2 accesses the attribute conversion table shown in FIG. 11 based on the roaming station number sent from the mobile terminal PS31 and the identification result of the home private branch exchange. Then, the attribute information to be used by the visitor private branch exchange EX2 for the mobile terminal PS31 is read. That is, the attribute information is converted.

If there is the corresponding attribute information and the conversion can be performed normally, the process proceeds to step S93, where the converted attribute information is set in association with the mobile terminal PS31 that has made the location registration request. . If the corresponding attribute information is not stored in the attribute conversion table and the attribute information cannot be converted, the visitor private branch exchange EX2 proceeds to step S94, where the attribute information is sent to the mobile terminal PS31. The default value is set as or the control to reject the location registration request is performed.

For example, if the roaming station number 316 is assigned to the mobile terminal PS31, the tenant number T2 and the connection regulation class "special shell" corresponding to the visitor private branch exchange EX2 are read from the attribute conversion table of FIG. These are set in the visitor private branch exchange EX2 for the mobile terminal PS31. Also, the mobile terminal PS3
If the roaming station number 317 is given to 1, the tenant number T2 and the connection regulation class "Otsu" are read from the attribute conversion table of FIG. 11, and these are read to the mobile terminal PS31 in the visitor private branch exchange EX2. Is set.

Therefore, according to this embodiment, as with the first and second embodiments, the private branch exchange EX1,
Even if the setting of the tenant number is different between EX2 and EX3, the mobile terminal can be accommodated in an appropriate tenant on the premises of the moving destination, and the roaming station number is assigned to the mobile terminal and this roaming station number is assigned. Since the attribute information is converted and set according to the roaming request from the mobile terminal based on, when the mobile terminals housed in the same tenant in the home private branch exchange move to the visitor private branch exchange, Connection control can be performed by giving different attribute information to these mobile terminals.

According to this embodiment, the visitor private branch exchange reads out and sets the corresponding attribute information from the attribute conversion table using the roaming station number as a key. Therefore, the visitor private branch exchange sends an inquiry to the home private branch exchange. The procedure can be omitted, whereby the roaming procedure can be simplified and the time required for roaming control can be shortened. Further, by omitting the inquiry procedure, it is possible to reduce the traffic on the leased line.

(Fourth Embodiment) In this embodiment, in a private network having a multi-tenant structure, when the private branch exchange is set so that the base station used for each tenant is different, the mobile terminal moves. When the location registration request is made in the visitor private branch exchange, the tenant to be accommodated is decided depending on which base station or calling area the location registration request is made in.

FIG. 12 shows the structure of the calling area of the private branch exchange used in the system according to this embodiment. In the figure, the base stations a, d, g and h form the calling areas EA, EC, EE and EF, respectively,
On the other hand, base stations b and c and e and f respectively form two calling areas EB and ED.

FIG. 13 is a tenant determination table showing the correspondence relationship between the calling areas EA, EB, EC, ED, EE, EF and the tenants T1, T2, T3 configured as described above. In this table, the calling area EA,
The tenant T1 is set for EB and EC, the tenant T2 is set for the calling area ED, and the tenant T3 is set for the calling areas EE and EF.

It is assumed that a mobile terminal, which has moved from another premises, makes a location registration request to the private branch exchange having such a configuration. At this time, the private branch exchange determines through which base station the location registration request from the mobile terminal has arrived. Then, based on this determination result, the corresponding tenant number is read by accessing the tenant determination table, and the mobile terminal that has made the location registration request is accommodated in the tenant of this tenant number.

For example, when the mobile terminal makes a location registration request in the calling area EB, the mobile terminal is accommodated in the tenant with the tenant number T1 and thereafter connection control relating to outgoing and incoming calls is performed in this tenant. Further, when the mobile terminal makes a location registration request in the calling area EE, the mobile terminal is accommodated in the tenant with the tenant number T3, and thereafter, connection control relating to outgoing and incoming calls is performed in this tenant.

As described above, when the mobile terminal moves to the premises of the visitor private branch exchange and makes a location registration request, the mobile terminal is accommodated in a tenant preset in association with the calling area that has made the location registration request. To be done. Therefore,
When the mobile terminal moves to the premises of the visitor private branch exchange,
If a location registration request is made in the department or floor to which the employee is dispatched, the tenant will be automatically accommodated when used in these departments or floors.

That is, no matter which private branch exchange a mobile terminal moves to, if it makes a location registration request at a place where it should go on its premises, it will be accommodated in an appropriate tenant without error, so that a proper connection is always established. It becomes possible to perform control and billing.

The present invention is not limited to the above embodiments. For example, in the first and second embodiments, a case has been described in which a common tenant is set for each of the private branch exchanges EX1, EX2, EX3, but when a different tenant is set for each private branch exchange as shown in FIG. Also, the present invention can be similarly applied. That is, an attribute conversion table may be created for each private branch exchange according to the setting status of the tenant, and attribute information may be assigned to mobile terminals using this table.

In each of the above-described embodiments, the case where the private branch exchange performs the conversion / setting of the attribute information has been described. However, a control station such as a host computer to which each private branch exchange is connected via a communication line is provided in the private network. If present, this control station may perform conversion of attribute information or the like. That is, based on the location registration request issued by the mobile terminal, the private branch exchange inquires of the control station about the attribute information, and the control station converts the attribute information using the mobile terminal detection table and the attribute conversion table. . Then, the converted attribute information is notified from the control station to the visitor private branch exchange, and thereafter the visitor private branch exchange uses the notified attribute information to execute connection control relating to the mobile terminal.

In addition, the number and configuration of private branch exchanges, the control procedure and control contents for attribute conversion, the tenant configuration, the type of attribute information, etc. can be variously modified and implemented without departing from the scope of the present invention.

[0072]

As described above in detail, according to the present invention, the visitor private branch exchange to which the mobile terminal moves, the home private branch exchange to which the mobile terminal originally belongs, and further, the above private branch exchanges are connected. The control station provided with a means for converting the attribute information of the mobile terminal, when the location registration request comes from the mobile terminal, between the visitor private branch exchange and the home private branch exchange, or visitor private branch exchange and the control station By performing inquiry control between the mobile terminal and converting the attribute information of the mobile terminal into attribute information suitable for use in the visitor private branch exchange, or converting the attribute information in the visitor private branch exchange. Based on the converted attribute information, communication control relating to the mobile terminal that has made the location registration request is performed.

Therefore, according to the present invention, there is provided a mobile communication network system capable of always performing appropriate roaming even when a plurality of private branch exchanges in a private network independently set attributes for mobile terminals. be able to.

[Brief description of drawings]

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

2 is a private branch exchange EX1, E of the system shown in FIG.
The block diagram which shows the structure of X2 and EX3.

3 is a block diagram showing a functional configuration of a central control unit and a storage unit of the private branch exchange shown in FIG.

FIG. 4 is a diagram showing a tenant configuration according to the first embodiment.

FIG. 5 is a diagram showing a configuration example of an attribute conversion table provided in the visitor private branch exchange according to the first embodiment.

FIG. 6 is a flowchart showing a procedure and contents of attribute setting control by the visitor private branch exchange according to the first embodiment.

FIG. 7 is a sequence diagram showing an attribute information inquiry procedure performed between a visitor private branch exchange and a home private branch exchange.

FIG. 8 is a diagram showing a configuration example of an attribute conversion table provided in a home private branch exchange in the second embodiment of the present invention.

FIG. 9 is a flowchart showing the procedure and contents of attribute setting control by the visitor private branch exchange according to the third embodiment of the present invention.

FIG. 10 is a diagram showing a tenant configuration according to the third embodiment.

FIG. 11 is a diagram showing a configuration example of an attribute conversion table provided in a visitor private branch exchange according to the third embodiment.

FIG. 12 is a diagram showing a configuration of a calling area of a private branch exchange used in a system according to a fourth embodiment of the present invention.

13 is a diagram showing a configuration of a tenant determination table showing a correspondence relationship between the calling area and the tenant shown in FIG.

FIG. 14 is a diagram showing a tenant configuration according to another embodiment of the present invention.

[Explanation of symbols]

E1, E2, E3 ... Private area communication area EA, EB, EC, ED, EE, EF ... Ringing area EX1, EX2, EX3 ... Private branch exchange (PBX) SL12, SL13 ... Private line PL1, PL2, PL3 ... Station line CS11 ... CS1j, CS21 to CS2m, CS31 to
CS3n, a to h ... Base stations PS11 to PS13, PS21 to PS23, PS31 to
PS34 ... Mobile terminal 100 ... Switching circuit 111-11i ... Station line interface (NWI / F) 121-12j ... Base station interface (CSI / F) 131-132 ... Dedicated line interface (SLI / F) 140 ... Central control unit ( CC) 141 ... Terminal position detection means 142 ... Attribute inquiry control means 143 ... Attribute conversion means 144 ... Terminal connection control means 150 ... Storage unit (MEM) 151 ... Mobile terminal detection table 152 ... Attribute conversion table

Claims (5)

[Claims] 1. A plurality of private branch exchanges connected to each other via a communication line, and a base station arranged in an area controlled by these private branch exchanges and connected to the corresponding private branch exchanges via wired lines. And a plurality of mobile terminals connected to the base station via a radio channel within a radio area formed by the base station, wherein each of the plurality of private branch exchanges is In response to a location registration request from a mobile terminal belonging to the private branch exchange, the inquiry means for inquiring attribute information to the private branch exchange to which the mobile terminal originally belongs via the communication line, and the private branch exchange from the private branch exchange. When an inquiry for information arrives, a notification means for notifying the private branch exchange of the inquiry source of the attribute information of the corresponding mobile terminal, and the private branch exchange of the inquiry destination When the attribute information of the mobile terminal is notified from the mobile terminal, the notified attribute information is converted into attribute information suitable for the own device, and the converted attribute information is related to the mobile terminal that has issued the location registration request. A mobile communication network system comprising: attribute information setting means for setting for communication control. 2. A plurality of private branch exchanges connected to each other via a communication line, and a base station arranged in an area controlled by these private branch exchanges and connected to the corresponding private branch exchanges via wired lines. And a plurality of mobile terminals connected to the base station via a radio channel within a radio area formed by the base station, wherein each of the plurality of private branch exchanges is In response to a location registration request from a mobile terminal that belongs to the private branch exchange, an inquiry means for making an inquiry to the private branch exchange to which the mobile terminal belongs via the communication line, and when the inquiry comes from another private branch exchange. To
Notifying means for generating attribute information suitable for using the corresponding mobile terminal in the private branch exchange of the inquiry source and notifying the private branch exchange of the inquiry source, and when the attribute information is notified from the private branch exchange of the inquiry destination A mobile communication network system, further comprising: attribute information setting means for setting the notified attribute information for subsequent communication control relating to the mobile terminal that has made the location registration request. 3. A plurality of private branch exchanges connected to each other via a communication line, and a base station arranged in an area controlled by these private branch exchanges and connected to the corresponding private branch exchanges via wired lines. And a plurality of mobile terminals connected to the base station via a radio channel within a radio area formed by the base station, wherein each of the plurality of private branch exchanges is Associated with each of the plurality of mobile terminals belonging to the private branch exchange, attribute information storage means storing attribute information suitable for using the mobile terminal in its own device, and mobile terminals belonging to other private branch exchanges. In response to the location registration request from the device, the attribute information suitable for the self-device corresponding to the mobile terminal is read from the attribute information storage means, and the read attribute information is requested to the location registration. A mobile communication network system comprising: attribute information setting means for setting communication control for the mobile terminal. 4. A plurality of private branch exchanges, base stations each provided in an area controlled by these private branch exchanges and connected to the corresponding private branch exchanges via a wired line, and a wireless area formed by the base stations. A mobile communication network system comprising a plurality of mobile terminals connected to the base station via a radio channel, and a control station respectively connected to the plurality of private branch exchanges, wherein the control station is the Attribute information storage means, which is associated with each of a plurality of mobile terminals, stores attribute information suitable for using the mobile terminal in each private branch exchange, for each private branch exchange, and a mobile terminal from each private branch exchange. And a notification means for notifying the relevant private attribute information from the attribute information storage means and notifying the private branch exchange of the inquiry source when the inquiry about the attribute information has arrived. And each of the private branch exchanges makes an inquiry means for making an inquiry about the attribute information to the control station in response to a position registration request from a mobile terminal, and the attribute information notified from the control station in response to the inquiry, A mobile communication network system, comprising: attribute information setting means for setting for subsequent communication control relating to a mobile terminal that has made a registration request. 5. The attribute information includes at least identification information of a tenant to which the mobile terminal belongs, and connection restriction information given to the mobile terminal by the tenant, according to any one of claims 1 to 4. The mobile communication network system described in 1.