JPH07212826A - Mobile terminal accommodation method - Google Patents

Abstract

(57) [Summary] [Purpose] Regarding a method of accommodating mobile terminals in a public switched network or a private branch exchange network, an object thereof is to make it possible to economically use mobile terminals accommodated in the public switched network even in the private branch exchange network. . [Composition] In a communication system having a public exchange network (100) and a private branch exchange network (200) having a position registration function of a mobile terminal, and a mobile terminal (300) capable of communicating with any of the exchange networks, a private branch exchange network In addition, the mobile terminal is accommodated in the public switched network,
Also, the public network location registration storage means (202) for storing that the location registration has been requested in the public exchange network via the private branch exchange network, and the portable terminal that has requested the location registration are accommodated in the public exchange network and the public network location registration memory If not stored in the means, the location request is requested to the private branch exchange network and the public exchange network, and the requesting portable terminal is accommodated in the public exchange network and stored in the public network location registration storage means. Is provided with location registration requesting means (203) for requesting location registration only to the private branch exchange network.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable terminal accommodating system in a communication system having a public exchange network and a private branch exchange network, and more particularly to a public exchange network capable of accommodating the private branch exchange network and the portable terminal, and accommodating the portable terminal. The present invention relates to a mobile terminal accommodating system in a communication system having a possible private branch exchange network and a mobile terminal capable of communicating with both the public exchange network and the private branch exchange network.

With the spread of mobile terminals not only in the public switched network but also in the private switched network, the same wireless system is adopted in the public switched network and the private switched network, and the same mobile terminal is used in the public switched network and the private switched network. It is under consideration to be shared with the switching network.

[0003]

2. Description of the Related Art FIG. 10 is a diagram showing an example of a conventional communication system, FIG. 11 is a diagram showing another example of a conventional communication system, and FIG. 12 is a diagram showing an example of a wireless channel of a mobile terminal. FIG. 13 is a diagram showing an example of a mobile terminal authentication process.

In FIG. 10, 1 is a public switched network (CC).
N), 2 is a private branch exchange (PBX), 3 _C is a public network base station (CS _C ), 3 _P is a private network base station (CS _P ), 4 _C
Is a public network mobile terminal (PS _C ), 4 _P is a private network mobile terminal (PS _P ), and 11 is a local line.

In the public switched network (CCN) (1), a private branch exchange (PBX) (2) is accommodated via a central line (11), and a portable terminal for public network (PS _C ) (4) _C )
Are accommodated via the public network base station (CS _C ) (3 _C ).

A private branch exchange (PBX) (2) accommodates a private network portable terminal (PS _P ) (4 _P ) via a private network base station (CS _P ) (3 _P ). There is. See also
In 11, three sets of private branch exchanges (PBX) (2)
They are connected to each other by a trunk line (5) to form a private branch exchange network (hereinafter simply referred to as a private branch network), and are housed in a public switched network (CCN) (1) via a central line (11).

Also in FIG. 11, the public switched network (CCN)
(1) is a mobile terminal for public networks (PS _C) (4_C)But,
Public network base station (CS_C) (3_C) Is accommodated via
In addition, each private branch exchange (PBX) (2)
Mobile terminals for each internal network (PS_P) (4_P) Is the local network
Base station (CS_P) (3_P) Is accommodated via
It

Each public network base station (CS _C ) (3 _C ) and each public network portable terminal (PS _C ) (4 _C ) have a specific frequency (f _CC ) as shown in FIG. Control channel and n unique sets of frequencies (f _S1 ) to (f _Sn )
, And performs control such as location registration and call processing via the control channel, and executes a call via the call channel.

The frequencies for the control channel and the speech channel are time-division multiplexed into four slots in the same area as shown in FIG. 12, and three frequencies are simultaneously used for one frequency (f _S1 ) to (f _Sn ). Is possible.

In addition, the base station for the internal network (CS_P) (3_P)When
Mobile terminals for each local network (PS_P) (4 _P) Is shown in Figure 12.
Specific frequency (f_CP) With a control channel
, And n unique frequencies (f_S1) To (f_Sn)
With a call channel and via the control channel
To perform location registration and control of call processing, etc.
Make a call over the channel.

Also in the private branch exchange (PBX) (2), the control channel and the communication channel are used by time division multiplexing in four slots as in the public switched network (CCN) (1), and three communication calls are simultaneously performed. Is possible.

A portable terminal for public networks (PS_C) (4_C)
And a mobile terminal for private network (PS_P) (4 _P) Is the call channel
The frequency for flannel is f_s1To f_SnIs shared, but
The frequency for each channel is f_CCAnd f_CPDifferent from
Therefore, the mobile phone for public networks (PS_C)
(4_C) Is the base station for the internal network (CS_P) (3_P) And communication
Can not.

In FIG. 11 and FIG. 12, when the public network portable terminal (PS _C ) (4 _C ) is brought to the premises of the private branch exchange (PBX) (2), the public network base station (CS _C ) ( Three
_C ) communicable range [hereinafter public network zone number (ZN _C )
If it does not include the campus, the call becomes impossible.

Therefore, a public network portable terminal (PS)_C) (4
_C) Was brought to the premises of the private branch exchange (PBX) (2)
In order to enable communication even in the case shown in Fig. 10 and Fig. 11.
As shown in the table, each private branch exchange (PBX) (2) has a public
Public network base station (CS_C) (3 _C) Need to be installed
It

A portable terminal for public networks (PS _C )
Since (4 _C ) moves between the public network zones of each public network base station (CS _C ) (3 _C ), the zone number (ZN _C ) of the existing public network zone is changed to the public switched network (CCN) ( 1) It is necessary to perform so-called location registration, which is performed by registering at a predetermined location in
Each time the mobile terminal for public network (PS _C ) (4 _C ) moves between public network zones, it requests location registration [update] to the public switched network (CCN) (1). At this time, in order to authenticate the requesting public network portable terminal (PS _C ) (4 _C ), an authentication process as shown in FIG. 13 is executed.

In FIG. 13, the mobile phone has moved between public network zones.
Mobile terminal for public network (PS_C) (4_C) Has a unique mobile end
End identification information (ID_PS) Including a position registration request signal [ea
(ID _PS)] To the public switched network (CCN) (1)
When sent, the public switched network (CCN) (1) will send an authentication random number
(RN) is a mobile terminal for public networks (PS)_C) (4_C) To
Authentication request signal [eb (RN)] to
[FIG. 13 Step SC1], a public network portable terminal (PS
_C) (4_C) And a common certificate with each
Performs predetermined arithmetic processing using the key (KN) and
Calculation result (AN_C) Is obtained [step SC2 in FIG. 13].

On the other hand, mobile terminals for public networks (PS _C ) (4 _C )
Extracts the authentication random number (RN) from the authentication request signal [eb (RN)] transferred from the public switched network (CCN) (1) and shares the authentication random number (RN) with the public switched network (CCN) (1).
N) is used to execute a predetermined calculation process to obtain the authentication calculation result (AN) [step SC3 in FIG. 13] and returned to the public switched network (CCN) (1) by the authentication response signal [ec (AN)]. To do.

The public switched network (CCN) (1) extracts the authentication calculation result (AN) from the authentication response signal [ec (AN)] returned from the mobile terminal for public network (PS _C ) (4 _C ). , The calculated authentication calculation result (AN _C ) is compared [FIG. 13 step SC4], and both authentication calculation results (AN) and (AN
_C ) match, public network mobile terminal (PS _C )
Authenticate (4 _C ) as normal and execute predetermined location registration.

[0019]

As is apparent from the above description, in the conventional mobile communication system, the public network portable terminal (PS _C ) (4 _C ) is replaced by the private branch exchange (PBX).
(2) Or, in order to be able to use it even in the premises of the private branch exchange network, it is necessary to install a public network base station (CS _C ) (3 _C ) in each premises, and the public switched network (CCN) (1) There was a problem that impaired the economy of the.

An object of the present invention is to make a public network portable terminal economically usable even in a private branch exchange network.

[0021]

FIG. 1 is a diagram showing the principle of the present invention. In FIG. 1, 100 is a public switched network and 10
1 is a location registration function of the public switched network (100), 2
00 is a private branch exchange network, 201 is a location registration function of the private branch exchange network (200), and 300 is a mobile terminal capable of communicating with both the public exchange network (100) and the private branch exchange network (200).

Location registration functions (101) and (201)
Is a function of registering the existing position of the mobile terminal (300). Reference numeral 202 denotes a public network location registration storage means provided in the private branch exchange network (200) according to the present invention.

203 is a private branch exchange network (20) according to the present invention.
0) is a location registration requesting means.

[0024]

In the public network position registration storage means (202), the portable terminal (300) is accommodated in the public exchange network (100), and the public exchange network (100) is passed through the private branch exchange network (200). The fact that the location registration has been requested is stored.

When the location registration requesting means (203) requests location registration from the mobile terminal (300), the location registration request source mobile terminal (300) is accommodated in the public switched network (100). When the mobile terminal (300) identifies that it is not stored in the public network position registration storage means (202),
Location registration function (201) in the private branch exchange network (200)
And the location registration function (101) in the public switched network (100)
Requesting location registration with respect to and the mobile terminal (300) of the location registration request source is accommodated in the public switched network (100), and the mobile terminal (300) has public network location registration storage means (202). When it is identified as already stored, the location registration function (201) in the private branch exchange network (200) is requested to perform location registration only.

The location registration requesting means (203) identifies information indicating that the mobile terminal (300) has received the location registration request and the mobile terminal (300) is accommodated in the public switched network (100). , The mobile terminal (3) is added based on the identification information added to the received position registration.
It is considered to recognize that 00) is accommodated in the public switched network (100).

Further, the location registration requesting means (203) has a public network location registration storing means (202) which indicates whether or not the location registration requesting portable terminal (300) is accommodated in the public switched network (100). And the mobile terminal (300) accommodated in the public switched network (100) is the public switched network (100).
And the information indicating whether or not location registration has been requested is stored in the public switched network (100) based on the identification information stored in the public network location registration storage means (202). ) Is considered to be recognized.

The location registration requesting means (203) transfers the subscriber data indicating the attribute of the portable terminal (300) to the public exchange network (100) when requesting the location registration to the public exchange network (100). It is considered that the subscriber data requested and transferred from the public switched network (100) is used for management of the mobile terminal (300) as the location registration request source.

The location registration requesting means (203) uses an authentication random number for authenticating the portable terminal (300) as the location registration request source as subscriber data from the public exchange network (100) and the authentication random number as a predetermined authentication key. When the authentication calculation result obtained by performing a predetermined calculation is transferred, the authentication random number is transferred to the mobile terminal (300) of the location registration request source, and the authentication random number is transferred to the mobile terminal (300 of the location registration request source. ), The authentication calculation result sent back from the public switched network (100) is collated with the authentication calculation result, and the mobile terminal (300) of the location registration request source is considered to be authenticated.

In the location registration function (101) in the public switched network (100), if the location-registered mobile terminal (300) currently exists in the private switched network (200), the private switched network (20)
When the location registration is requested from other than 0), the public network location registration storage means (202) is sent to the private branch exchange network (200).
An instruction to change the stored location registration requested to unrequested is sent to the private branch exchange network (200), and the public exchange network (100)
The mobile terminal (300) is accommodated in the public switched network (100) when the location registration change instruction is received from
In addition, via the private branch exchange network (200), the public exchange network (1
It is considered to delete the memory whose location registration has been requested in 00).

Further, in the public switched network (100), an incoming call to the portable terminal (300) accommodated in the existing public switched network (100) in the private switched network (200) occurs, and the private switched network (200). When requesting an incoming connection to the mobile terminal (300), the accommodation information indicating that the mobile terminal (300) is accommodated in the public switched network (100) is added to the telephone number of the mobile terminal (300). It is added and transmitted to the private branch exchange network (200).
Based on the telephone number with accommodation information transferred from the public switched network (100), it is considered to make an incoming call connection to the incoming mobile terminal (300).

In the private branch exchange network (200), the mobile terminal (300) whose location registration requesting means (203) has requested location registration to the public exchange network (100) is the public exchange network (100).
When the outgoing call is completed to the public switched network (10
It is considered that 0) transfers to the public switched network (100) the charging information required for 0) to calculate the call charge for the originating mobile terminal (300).

Therefore, when the mobile terminal accommodated in the public switched network is used in the private branch exchange network, dedicated communication equipment for the public switched network to communicate with the mobile terminal is installed within the private branch exchange network. It is no longer necessary to install it in the public switched network, and it becomes possible to communicate with the public switched network via the private switched network. This greatly improves the economic efficiency of the public switched network, and the mobile terminals accommodated in the public switched network can be used in the private switched network. The service to be used can be greatly expanded.

Further, in order to authenticate the portable terminal requesting the location registration, it becomes unnecessary to notify the private exchange network of confidential information (authentication key etc.) of the public exchange network, and the reliability of the public exchange network is improved.

[0035]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 2 is a diagram showing a communication system according to an embodiment of the present invention, FIG. 3 is a diagram showing an example of a public network portable terminal location registration process in FIG. 2, and FIG. 4 is a public network portable terminal in FIG. 5 is a diagram showing an example of a terminal originating connection process, and FIG.
2 is a diagram showing an example of a public network portable terminal incoming / outgoing connection process in FIG. 2, FIG. 6 is a diagram showing an example of a public network portable terminal location deregistration process in FIG. 2, and FIG. 8 is a diagram showing a communication system according to the embodiment of the present invention, FIG. 8 is a diagram showing an example of a shared mobile terminal location registration process in FIG. 7, and FIG. 9 is a diagram showing an example of a shared mobile terminal location registration cancellation process in FIG. Is. The same reference numerals denote the same objects throughout the drawings.

First, an embodiment of the present invention will be described with reference to FIGS. 2, the public switched network (100), the private branch switched network (200) and the mobile terminal (300) in FIG. 1 are respectively public switched networks (CCN).
(1), a private branch exchange (PBX) (2) and a mobile terminal for public network (PS _C ) (4 _C ) are shown, and a public network location registration unit (1) is provided as a location registration function (101) in FIG.
2) and a public network database (CNDB) (16) are provided in the public switched network (CCN) (1), and a private branch location registration unit (221) is a private branch exchange (PBX) as a location registration function (201) in FIG. ) (2) is provided in the central control unit (CC) (22), and the public network terminal premises database (CDB) (231) is the main storage device as the public network location registration storage means (202) in FIG. (MM) (23), the CDB processing unit (222) is provided in the central controller (CC) (22), and the location registration requesting unit (203) in FIG. 1 serves as the location registration requesting unit. (223) is the central controller (CC)
It is provided in (22).

In the other public switched network (CCN) (1), as an embodiment of the present invention [Claims 1, 2, 4, 5, 6 and 7], a subscriber data transfer unit (13) and a private network are provided. An authentication unit (14) and a registration deletion instruction unit (15) are provided,
In the private branch exchange (PBX) (2), a recognition execution unit (224), a public network transmission unit (225), a billing information transfer unit (226), a public network reception unit (227) and a belonging public network table (CNT). ) (232) is provided.

The public switched network (CCN) (1) accommodates the mobile terminals (PS _C ) (4 _C ) for the public network, and the public switched network (CCN) (1) and the mobile terminals for the public network (PS). _C ) (4
_{With C} ), communication is possible using a control channel and a communication channel as shown in FIG.

On the other hand, the private branch exchange (PBX) (2) accommodates the private terminals (PS _P ) (4 _P ) for the private network, which are not shown, and is connected to the private branch exchange (PBX) (2) and the private network portable. It is possible to communicate with the terminal (PS _P ) (4 _P ) using the control channel and the communication channel as shown in FIG.

A portable terminal for public network (PS _C ) (4 _C )
Controls the frequency of the control channel on the public switched network (CCN)
From f _CC for (1) to f for private branch exchange (PBX) (2)
Private branch exchange (PBX) by switching to _CP (2)
A public premises switching unit (41) that enables communication with the public premises is provided.

However, the range in which the public switched network (CCN) (1) can communicate with the portable terminals (PS _C ) (4 _C ) for the public network (so-called public network zone) and the private branch exchange (PBX) (2) are It is assumed that the portable terminal for the private network (PS _P ) (4 _P ) and the range within which communication is possible (so-called private network zone) do not overlap each other.

2 to 6, when the public network portable terminal (PS _C ) (4 _C ) is located in the public network zone, it is installed in the public switched network (CCN) (1). Various broadcast information transmitted via the control channel [frequency f _CC ] is received from the public network base station (CS _C ) (3 _C ) which is not operated.

Mobile terminal for public network (PS _C )
When (4 _C ) moves to the private network zone, various notification information transmitted from the public network base station (CS _C ) (3 _C ) becomes unreceivable.

The portable terminal for public network (PS _C ) (4 _C ) is
When it is detected that various notification information from the public network base station (CS _C ) (3 _C ) cannot be received, the public premises switching unit (41) and the public network information transmitting unit (42) are activated.

The activated public premises switching section (41) switches the reception frequency of the control channel from f _CC to f _CP , and the private branch network base station (CS _P ) installed in the private branch exchange (PBX) (2). ) (3 _P ) to control channel (frequency f _CP )
Attempts to receive various notification information transmitted via the network, and if reception is successful, the transmission frequency of the control channel will be switched to f _CP thereafter, and communication from the existing public network zone to the internal network zone Switch to a state in which communication is possible.

The public network information transmission unit (42) which has been activated
Generates public network identification information (ID _CN ) indicating that the public network portable terminal (PS _C ) (4 _C ) is accommodated in the public switched network (CCN) (1).

The portable terminal for public network (PS _C ) (4 _C ) is
Mobile terminal for public network (PS _C ) (4 _C ) to request location registration accompanying movement from public network zone to private network zone
Unique mobile terminal identification information (ID _PS ) and public network identification information (I _PS ) generated by the public network information transmission unit (42).
_DCN ) and a public network telephone number (DN _C ) to generate a location registration request signal [a (ID _PS , ID _CN , DN _C )],
Transmit via the switched control channel (frequency f _CP ).

In the private branch exchange (PBX) (2),
For local area network base station (CS _P) (3 _P) is a location registration request signal transmitted from the portable terminal for PSTN (PS _C) (4 _{C) [a (ID PS, ID CN,} DN C) ] the Receive and base station control circuit (CSC) (24) and network (NW)
It is transmitted to the central controller (CC) (22) via (21).

The central controller (CC) (22) sends a location registration request signal [a] from the local network base station (CS _P ) (3 _P ).
(ID _PS , ID _CN , DN _C )], the location registration requesting unit (223) is activated.

The activated position registration request unit (223)
The transmitted position registration request signal [a (ID _PS , ID _CN , D
N _C )] and identifies that the public network identification information (ID _CN ) is added, the location registration request signal [a (I
D _PS , ID _CN , DN _C )] is not the private network mobile terminal (PS _P ) (4 _P ) but the public network mobile terminal (PS _C ) (4 _C ). It is identified [step S31 in FIG. 3] and the belonging public network table (CNT) (232) in the main memory (MM) (23) is referred to.

The public network table (CNT) (232) belongs to
Public network identification information (I) indicating the public switched network (CCN) (1) in which the private branch exchange (PBX) (2) is accommodated.
_DCN ) is registered.

The location registration request unit (223) requires location registration.
Request signal [a (ID_PS, ID_CN, DN _C)]
Public network identification information (ID_CN) Is the location registration request unit (22
If it is identified as registered in 3), request for location registration
Signal [a (ID_PS, ID_CN, DN_C)] Source public
Mobile terminal for network (PS_C) (4_C) Is the public switched network (CC
N) (1) and it is determined that the house is accommodated [Step S in FIG.
32], then the public network end in the main memory (MM) (23)
Refer to the end-use campus database (CDB) (231)
It

Premises database (CDB) for public network terminals
In (231), there are public network mobile terminals (PS _C ) (4 _C ) accommodated in the public switched network (CCN) (1) registered in the belonging public network table (CNT) (232), which are private branch exchanges. (PB
X) (2) to position registration request signal [a (ID _PS , ID _CN ,
DN _C )] is transmitted and accommodated in the public switched network (CCN)
Various information about the public network mobile terminal (PS _C ) (4 _C ) that has requested the location registration to (1) is registered. In FIG. 2, the public network mobile terminal (PS _C ) that is the registration target is registered. corresponding to _C) (4 _C) mobile terminal identification information (ID _PS), local area network zone number for the public network the mobile terminal (PS _C) (4 _C) is existing private branch exchange (PBX) (2) ( ZN _P ), public network mobile terminal (PS _C ) (4 _C ) is given from the public switched network (CCN) (1), public network telephone number (DN _C ), public network mobile terminal (PS _C ).
The subscriber data (SD _C ) related to (4 _C ) is stored.

At present, the location registration request signal [a (I
The mobile terminal for public network (PS _C ) (4 _C ) that is the transmission source of D _PS , ID _CN , DN _C ) is not registered in the public network terminal premises database (CDB) (231).

The location registration request unit (223) requires location registration.
Request signal [a (ID_PS, ID_CN, DN _C)] Source public
Mobile terminal for public network (PS_C) (4_C) Is for public network terminals
Not registered in the internal database (CDB) (231)
When is identified, the mobile terminal for public network (PS_C) (4_C)
Request location registration of the public switched network (CCN) (1)
Therefore, the subscription confirmation signal [b (DN_C)] Generate the net
Work (NW) (21) and central line trunk (CBT)
It is sent to the station line (11) via (25) [Step 3 in FIG.
S33].

Since the location registration request unit (223) does not hold the subscriber data (SD _C ) relating to the public network portable terminal (PS _C ) (4 _C ), the public switched network (CCN).
Information (not shown) for requesting the transfer of the subscriber data (SD _C ) to (1) is included in the subscription confirmation signal [b (DN _C )].

Join confirmation signal transmitted [b (DN _C )]
Is the public switched network (CCN) via the central line (11)
It is transferred to (1). In the public switched network (CCN) (1), when the public network location registration unit (12) receives and analyzes the subscription confirmation signal [b (DN _C )] arriving from the office line (11), the public network database (CNDB) ) (16), the public network telephone number (DN _C ) included in the subscription confirmation signal [b (DN _C )] is the public network database (CNDB).
When it is identified that the mobile phone for public network (PS _C ) (4 _C ) is registered in (16), the public switched network (CCN)
Confirm that it is accommodated in (1) [Fig. 3 Step S
34], and further received subscription confirmation signal [b (DN _C )]
When it is identified that the transfer request information of the subscriber data (SD _C ) is included in, the mobile terminal for public network (PS _C )
Various information associated with (4 _C ) is stored in the public network database (C
After extracting from the NDB (16), the subscriber data transfer unit (13) and the private network authentication unit (14) are activated.

The activated local network authentication unit (14) extracts an authentication random number (RN) by a known procedure in order to authenticate the public network portable terminal (PS _C ) (4 _C ) which is the source of the location registration request. Then, a predetermined calculation is executed using the authentication key (KN) held in advance, and the result is transmitted to the subscriber data transfer unit (13) together with the obtained authentication calculation result (AN _C ).

The subscriber data transfer unit (13) adds the authentication random number (RN) transmitted from the private network authentication unit (14) to the subscriber data (SD _C ) extracted from the public network database (CNDB) (16). ) And the authentication calculation result (AN _C ), a subscriber data transfer signal [c (SD _C )] is generated, and the private branch exchange (PBX) is transmitted via the central office line (11).
Transfer to (2) [step S35 in FIG. 3].

In the private branch exchange (PBX) (2),
The location registration request unit (223) sends the subscriber data transfer signal [c (SD _C )] arriving from the office line (11) to the office line trunk (CBT) (25) and the network (NW).
The data is received and analyzed via (21), the subscriber data (SD _C ) is extracted from the subscriber data transfer signal [c (SD _C )], and is transmitted to the CDB processing unit (222).

The CDB processing unit (222) receives the subscriber data (SD _C ) transmitted from the location registration requesting unit (223).
In the public network terminal premises database (CDB) (231) in the main memory (MM) (23) and in the mobile terminal identification information (ID _PS ) of the public network mobile terminal (PS _C ) (4 _C ). Correspondingly stored [step S36 in FIG. 3].

Next, the location registration request unit (223) recognizes the recognition result.
The line part (224) is activated. The recognition execution unit (2
24) is the subscriber data (SD_C) Extracted from
Generates an authentication request signal [d (RN)] including the number (RN)
Network (NW) (21), base station control circuit
(CSC) (24) and private network base station (CS _P)
(3_P) Via public network mobile terminal (PS_C)
(4_C) To.

The mobile terminal for public networks (PS _C ) (4 _C ) is
An authentication random number (RN) is extracted from the authentication request signal [d (RN)] transferred from the private branch exchange (PBX) (2), and a predetermined calculation is executed using an authentication key (KN) held in advance,
Authentication response signal including the obtained authentication calculation result (AN) [e
(AN)] is generated and sent back to the private branch exchange (PBX) (2).

In the private branch exchange (PBX) (2),
The recognition execution unit (224) is a public network portable terminal (PS _C ).
The authentication calculation result (AN) is extracted from the authentication response signal [e (AN)] returned from (4 _C ) and the public switching network (CC
N) By collating with the authentication calculation result (AN _C ) extracted from the subscriber data (SD _C ) transferred from (1) and confirming that they match, the public network portable terminal (PS _C )
A location registration acceptance signal [f] indicating the completion of authentication of (4 _C ) is generated, and the network (NW) (21), base station control circuit (CSC) (24) and public network base station (CS _C ) are generated.
Mobile terminal for the public network via a _{(3 C) (PS C)} (4 C)
Send to.

The private branch exchange (PBX) (2) sends an authentication completion signal [n (D
N _C )], the public switched network (CCN) (1)
Uses the public network zone number (ZN _C ) in the public network database (CNDB) (16) as the private branch exchange (PBX).
By updating the identification information of (2), the location registration of the public network portable terminal (PS _C ) (4 _C ) is executed [step S37 in FIG. 3].

From then on, the public network portable terminal (PS _C ) (4 _C )
When the location registration request signal [a (ID _PS , ID _CN )] is transmitted from the public network terminal premises database (CD
B) Mobile terminal identification information (ID _PS ) registered in (231)
It becomes possible to authenticate the portable terminal (PS _C ) (4 _C ) for public network by using, and the authentication process shown in FIG. 3 becomes unnecessary.

Here, the recognition execution unit (see FIG. 13) performs the same processing steps (see FIG. 13) as the authentication processing of the public network portable terminals (PS _C ) (4 _C ) executed by the public switched network (CCN) (1). 22
4) is considered, but the public switched network (C
CN) (1) transfers the authentication random number (RN) and authentication key (KN) to the private branch exchange (PBX) (2), and the private branch exchange (PN)
The recognition execution unit (224) of the BX (2) transfers the authentication random number (RN) to the public network portable terminal (PS _C ) (4 _C ) as well as the public switched network (CCN) (1). (Fig. 13
Step SC1], authentication random number (RN) and authentication key (KN)
When the public switched network (CCN) (1) is executed using and, the same operation is executed to calculate the authentication operation result (AN _C ) [step SC2 in FIG. 13], and the public network portable terminal (PS _C ).
The authentication calculation result (AN) returned from (4 _C ) is collated [step SC4 in FIG. 13]. In such a case, confidential information called an authentication key (KN) is transmitted to the public switched network (CC).
N) (1) There is a problem that an unfavorable result occurs that the outside is notified.

Then, the authentication process as shown in FIG. 3 is executed to obtain the authentication key (KN) from the private branch exchange (P
BX) (2) does not need to be notified, and the above problem is solved.

The private branch exchange (PBX) (2) is a private branch exchange.
The position registration unit (221) is activated. Activated campus location
The registration unit (221) is a public network portable terminal (PS)._C) (4
_C), A public network base station (CS)_C) (3_C)
, Public network mobile terminals (PS _C) (4_C) Existing network
Zone number (ZN_P) Is identified, and the CDB processing unit (22
Communicate to 2).

The CDB processing unit (222) receives the on-premise network zone number (Z
The N _P), a main memory (MM) (23) private database for PSTN terminals in (CDB) (231), the portable terminal identification information (ID of the portable terminal for PSTN (PS _C) (4 _C)
Stored according to _PS ).

In the subscriber data (SD _C ), the public network portable terminal (PS _C ) (4 _C ) is the public switched network (CCN).
Since it seems that the public network telephone number (DN _C ) given from (1) is also included, the location registration request unit (22
3) extracts the public network telephone number (DN _C ) from the subscriber data (SD _C ) transferred from the public switched network (CCN) (1), transfers it to the CDB processing unit (222), and transmits it to the CDB processing unit. (222) stores the public network telephone number (DN _C ) transmitted from the location registration requesting unit (223) in the main storage device (MM).
Public network terminal premises database (CDB) in (23)
It stores in (231) corresponding to the mobile terminal identification information (ID _PS ) of the public network mobile terminal (PS _C ) (4 _C ). From the above, the public database terminal premises database (CDB) (2
At 31), the location registration of the private terminal for the public network (PS _C ) (4 _C ) in the private branch exchange (PBX) (2) is completed [step S38 in FIG. 3].

In this state, the public network portable terminal (P
When S _C ) (4 _C ) moves to another private network zone within the private branch exchange (PBX) (2), the public network mobile terminal (P _C )
S _C ) (4 _C ) is the mobile terminal identification information (I
D _PS ), public network identification information (ID _CN ) and public network telephone number (DN _C ) including a location registration request signal [a (ID _PS , I
D _CN, transmits a DN _C)].

In the private branch exchange (PBX) (2),
The location registration request unit (223) receives and analyzes the location registration request signal [a (ID _PS , ID _CN , DN _C )] as described above, and this time, the public network terminal premises database (CDB).
When referring to (231), a public network portable terminal (PS
_C ) (4 _C ) identifies that the mobile terminal identification information (ID _PS ) is registered in the public network terminal premises database (CDB) (231) [authentication processing], the public network mobile terminal (PS _C ) (4 _C ) is already a public switched network (CCN) (1)
To the public switched network (CCN) (1), and the registration confirmation signal [b (D
N _C )] is transmitted to the local location registration unit (22
1) Start up.

The activated indoor location registration unit (221)
Similar to the above, the private network zone number (ZN _P ) of the destination of the mobile terminal (PS _C ) (4 _C ) for the public network is identified, and the CDB
It is transmitted to the processing unit (222).

The CDB processing unit (222) uses the private network zone number (ZN _P ) transmitted from the private location registration unit (221) to store the public network terminal private database (CDB) (231) in the same manner as described above. , Mobile terminals for public networks (PS
_C ) (4 _C ) The stored private network zone number (ZN _P ) is updated corresponding to the mobile terminal identification information (ID _PS ) [FIG.
Step S39].

In this state, the public network portable terminal (P
S _C ) (4 _C ) calls the public switched network (CCN) (1) and selects the telephone number (DN _D ) of the called party, the public network mobile terminal (PS _C ) (4 _C ) Activates the public network information transmission unit (42).

The activated public network information transmission unit (42)
Similarly to the above, the public network identification information (ID _CN ) is generated.
The public network mobile terminal (PS _C ) (4 _C ) has a calling signal [g (including a mobile terminal identification information (ID _PS ), public network identification information (ID _CN ) and a telephone number (DN _D ). ID _PS , I
D _CN, generates a DN _D)], a private branch exchange (PBX)
Send to (2).

In the private branch exchange (PBX) (2),
The central controller (CC) (22) is a portable terminal (PS _C) (4 _C) calling signal transmitted from [g (ID for PSTN
_PS , ID _CN , DN _D )] to the public network base station (CS _C )
( _3C ), the base station control circuit (CSC) (24), and the network (NW) (21), the public network transmission unit (225) is activated.

The activated public network transmission unit (225) receives the call.
Call signal received [g (ID_PS, ID _CN, DN_D)]
And the public network identification information (ID_CN) Has been added
, The calling signal [g (ID_PS, ID_CN, D
N_D)] Is the mobile terminal that is the sender of the private network (PS)
_P) (4_P), Not a mobile terminal for public networks (PS_C)
(4 _C) Is identified [step S41 in FIG. 4],
Affiliated public network table (CN) in the main memory (MM) (23)
T) (232), the calling signal [g (ID_PS, ID
_CN, DN_D)] Is added to the public network identification information (ID
_CN) Has been registered in the location registration request unit (223)
Then, the public database terminal premises database (CD
B) (231), the calling signal [g (ID_PS, ID
_CN, DN_D)] Included in the mobile terminal identification information (ID_PS)
Is identified as registered [Step S4 in FIG. 4]
2], calling signal [g (ID_PS, ID_CN, DN_D)]
Shingen's mobile terminal for public network (PS_C) (4_C) To the local line
Public switched network (CCN) accommodated via (11)
To make an outgoing connection to (1) [step S43 in FIG. 4],
Called telephone number (DN_D) Including a calling signal [h (D
N_D)] Is generated, the network (NW) (21), the station
Via Line Trunk (CBT) (25) and Central Line (11)
And send it to the public switched network (CCN) (1).
A public network portable terminal (PS_C)
(4_C) And the office line (11), a call path is set up.

When the public switched network (CCN) (1) receives a calling signal [h (DN _D )] that arrives from the private branch exchange (PBX) (2) via the central office line (11), it is known. By the procedure, a call is set up between the private branch exchange (PBX) (2) and the called party, and a communication path is set up between the central office line (11) and the called party.

From the above, the mobile terminal for the calling public network (P
A call path is set between S _C ) (4 _C ) and the called party, and the calling public network portable terminal (PS _C ) (4 _C ) and the called party carry out a call [i].

When the call ends and the portable network mobile terminal (PS _C ) (4 _C ) sends a disconnection signal [j] to the private branch exchange (PBX) (2), the private branch exchange (PB)
X) (2) releases the call from the public network portable terminal (PS _C ) (4 _C ) in accordance with a known procedure, and the station line (11)
A disconnection signal [k] is transmitted to the public switched network (CCN) (1) via.

When the public switched network (CCN) (1) also receives the disconnection signal [k] sent from the private branch exchange (PBX) (2), the private branch exchange (PBX) is subjected to a known procedure.
Release the call set up between (2) and the called party.

In the private branch exchange (PBX) (2), the public network transmission unit (225) is connected to the charging information transfer unit (22).
6) Start up. The activated billing information transfer unit (226)
Is the public switched network (CCN) (1) is public, such as the other party of the mobile terminal for the public network (PS _C ) (4 _C ) [that is, the called telephone number (DN _D )], the call start time, the call end time, etc. The billing information (M) necessary for calculating the call charge for the call from the mobile terminal (PS _C ) (4 _C ) for the network is collected, and the billing information transmission signal [m ( M)] is generated and transmitted to the public switched network (CCN) (1) via the network (NW) (21), the office line trunk (CBT) (25) and the office line (11).

The public switched network (CCN) (1) receives the billing information (M) from the billing information transmission signal [m (M)] transferred from the private branch exchange (PBX) (2) via the office line (11). )
Is extracted and the call charge for the call from the mobile terminal for public network (PS _C ) (4 _C ) is calculated.

Next, in the public switched network (CCN) (1), when an incoming call to the public network portable terminal (PS _C ) (4 _C ) occurs, the public switched network (CCN) (1) performs a known procedure. Based on the public network database (CNDB) (1
6), refer to the public network mobile terminal (PS _C ) (4 _C )
When it is identified that the identification information of the private branch exchange (PBX) (2) is registered as the public network zone number (ZN _C ) corresponding to [the telephone number (DN _C )], the private branch exchange (PBX)
In order to request the BX) (2) to make an incoming connection to the mobile terminal (PS _C ) (4 _C ) for the public network, an incoming call signal [aa (DN _S +
DN _C )] is generated and transferred to the private branch exchange (PBX) (2) via the office line (11).

An incoming signal [aa (DN _S + DN _C )]
The special number (DN _S ) included in the incoming call signal [aa (D
N _S + DN _C )] is a special number indicating that the private branch exchange (PBX) (2) is an incoming call to the existing public network portable terminal (PS _C ) (4 _C ).

In the private branch exchange (PBX) (2),
The central control unit (CC) (22) sends an incoming call signal [aa (DN _S + DN _C )] arriving from the office line (11) to the office line trunk (CBT) (25) and the network (NW).
It is received and analyzed via (21) to identify that the special number (DN _S ) is added to the called telephone number (DN _C ), and to the public network mobile terminal (PS _C ) (4 _C ). When the call is identified as an incoming call [step S51 in FIG. 5], the public network receiving unit (227) is activated.

The activated public network receiving unit (227) is
Mobile terminal for call public network (PS_C) (4 _C) Existing campus
Network zone number (ZN_P) To detect main memory
(MM) Public database for public network terminals in (23)
(CDB) (231), and the called telephone number (D
N_C) Corresponding to the internal network zone number (ZN_P)
Is extracted [step S52 in FIG. 5], a known procedure is followed.
Premises network zone number (ZN _P) For internal network
Base station (CS_P) (3_P) From inside the ringing signal [ab]
Send to the network zone and call the called public network mobile terminal (PS_C)
(4_C) Detects an incoming call to itself and sends a response signal [ac]
Upon return, the private branch exchange (PBX) (2) should be
Responses to the public switched network (CCN) (1) in order
Return signal (ad) and public switched network (CCN)
(1) and mobile terminals for public networks (PS_C) (4 _CBetween)
Set the communication path.

The public switched network (CCN) (1) which has received the response signal [ad] also sets up a speech path between the caller and the office line (11). As a result, a call path is set up between the calling party and the called public network portable terminal (PS _C ) (4 _C ),
The calling party and the called public network portable terminal (PS _C ) (4 _C ) perform a call [i].

When the call ends and the calling party is restored, the public switched network (CCN) (1) follows the publicly known procedure and the private branch exchange (PBX) via the central office line (11).
The disconnection signal [ae] is transmitted to (2) and the call from the caller to the called public network portable terminal (PS _C ) (4 _C ) is released.

The private branch exchange (PBX) (2) is also a public exchange.
The disconnection signal [ae] transmitted from the network (CCN) (1)
Upon reception, the public network mobile terminal is followed according to the known procedure.
(PS _C) (4_C) To the called public network.
Mobile terminal (PS_C) (4_C) To disconnect signal [af]
Send and public switched network (CCN) (1) and mobile end for public network
End (PS_C) (4_C) Releases the call that is set up between
To do.

Next, the public network portable terminal (PS _C ) located in the private network zone of the private branch exchange (PBX) (2)
When (4 _C ) moves to the public network zone, the public network mobile terminal (PS _C ) (4 _C ) has been used until now for the private network base station (CS).
Various notification information transmitted from _P ) (3 _P ) cannot be received.

The portable terminal for public network (PS _C ) (4 _C ) is
When it is detected that various broadcast information from the local network base station (CS _P ) (3 _P ) cannot be received, the public local area switching unit (41) and the public network information transmitting unit (42) are activated.

The activated public premises switching section (41) switches the reception frequency of the control channel from f _CP to f _CC , and the public network base station (CS) installed in the public switched network (CCN) (1). _C ) (3 _C ) to control channel (frequency f _CC )
Attempts to receive various notification information transmitted via the network, and if reception is successful, the transmission frequency of the control channel will be switched to f _CC thereafter, and communication from the previous private network zone to the public network zone Switch to a state where communication is possible.

After that, the public network portable terminal (PS _C ) (4 _C )
Public switched network (CCN) (1) according to known procedures.
A location registration request signal [ba (DN _C )] is transmitted to. The public switched network (CCN) (1) that has received the location registration request signal [ba (DN _C )] is a public network database (C
NDB) (16), and refers to the location registration request source public network portable terminal (PS _C ) (4 _C ) [phone number (DN _C )]
When identifying the PSTN zone number already registered corresponding (ZN _C) is identification information of the private branch exchange (PBX) (2), the location registration request is transmitted PSTN zone number (Z
N _C ) is analyzed and it is identified as other than the private branch exchange (PBX) (2), the private branch exchange (PBX)
It is determined that the public network portable terminal (PS _C ) (4 _C ) located in the premises zone of (2) has moved to the outside of the premises zone [step S61 in FIG. 6], and the public network is followed according to a known procedure. The location registration process of the mobile terminal (PS _C ) (4 _C ) is executed [step S62 in FIG. 6] and the registration deletion instruction unit (15) is activated.

The activated registration deletion instructing section (15) is used for the public network to delete the registration of the public network portable terminal (PS _C ) (4 _C ) from the private branch exchange (PBX) (2). A location registration cancellation instruction signal [bb (DN _C )] including the telephone number (DN _C ) of the mobile terminal (PS _C ) (4 _C ) is generated,
Transfer to the private branch exchange (PBX) (2) via the central office line (11).

In the private branch exchange (PBX) (2),
The central controller (CC) (22) is a public switched network (CC).
N) Position registration cancellation instruction signal [bb transferred from (1)
(DN _C)] To the office line (11) and the office line trunk (CB
T (25) and network (NW) (21)
When received, the location registration request unit (223) is activated.
It

The activated position registration request unit (223)
When the telephone number (DN _C ) is extracted from the received position registration cancellation instruction signal [bb (DN _C )], the public network terminal premises database (CDB) (231) is referred to and the telephone number (DN _C ) corresponds to it. After searching the registered mobile terminal identification information (ID _PS ), activate the CDB processing unit (222) and instruct to delete all the registrations corresponding to the detected mobile terminal identification information (ID _PS ). To do.

The activated CDB processing section (222) receives the registered private network zone number (ZN _P ) and public network telephone number (DN) corresponding to the specified portable terminal identification information (ID _PS ).
_C ), all subscriber data (SD _C ) are deleted from the public network terminal premises database (CDB) (231), and the registration relating to the public network mobile terminal (PS _C ) (4 _C ) is deleted [Fig. 6]. Step S63].

As described above, the public network portable terminal (PS _C )
(4 _C ) does not exist in the private branch exchange (PBX) (2) private area. As is clear from the above description, according to the embodiment shown in FIGS. 2 to 6, the public network portable terminal (P) accommodated in the public switched network (CCN) (1).
Private branch exchange (PBX) when S _C ) (4 _C ) moves to the coverage area of the private branch exchange (PBX) (2)
Communication becomes possible as it is directly accommodated in the public switched network (CCN) (1) via (2), and the private branch exchange (PB
X) The public network base station (C
There is no need to install a part of the public switched network (CCN) (1) such as S _C ) (3 _C ).

When the private branch exchange (PBX) (2) receives the location registration request signal [a (ID _PS , ID _CN , DN _C )] from the public network portable terminal (PS _C ) (4 _C ). Public switching network (CCN) in the required authentication process
The authentication key (KN) of (1) is used as a private branch exchange (PBX) (2)
No longer need to be used by the public switched network (CCN)
A desirable result is obtained from the viewpoint of security protection in (1).

Next, another embodiment of the present invention will be described with reference to FIGS. In the embodiment shown in FIG. 7 to FIG. 9, the public network mobile terminal (PS _C ) (4 _C ) accommodated in the public switched network (CCN) (1) is a specific private branch exchange (PBX) ( It is also housed in 2) [hereinafter, such a mobile terminal is referred to as a shared mobile terminal (PS _CP ) (4 _CP )].

In such a state, the shared portable terminal (PS _CP )
(4 _CP ) is given a public network telephone number (DN _C ) from the public switched network (CCN) (1), and also has a private network telephone number (DN _P ) from the private branch exchange (PBX) (2). The private network terminal database (PDB) (233) provided in the main memory (MM) (23) for the private network portable terminal (PS _P ) (4 _P ) includes: The shared mobile terminal (PS _CP ) (4 _CP ) is also registered.
As shown in Fig. 4, a public network mobile terminal (PS _C ) (4 _C )
Private Public Network Terminal Premises Database (CDB) (23
Not registered in 1).

However, in the private network terminal database (PDB) (233) shown in FIG. 7, the private network telephone number (DN _P ) provided in the existing private network terminal database (PDB) (233), Mobile device identification information (ID _PS )
In addition to the private network zone number (ZN _P ), public network registration identification information (REG), public network identification information (ID _CN ) and public network telephone number (DN _C ) are added.

The public network identification information (ID _CN ) is information indicating the public switched network (CCN) (1) in which the mobile terminal corresponding to the private network telephone number (DN _P ) is accommodated, and is the shared mobile terminal ( PS _CP ) (4 _CP ), and public network registration identification information (REG) is shared mobile terminal (PS _CP )
Whether (4 _CP ) has already requested the location registration to the public switched network (CCN) (1) (for example, (REG) = if not requested)
This is information indicating that the logic is "0", and (REG) = logic is set to "1" if requested.

Further, in FIG. 7, the public switched network (CC
N) (1), the private branch exchange (PBX) (2) and the shared mobile terminal (PS _CP ) (4 _CP ) respectively include the public exchange network (CCN) in the private branch exchange (PBX) (2).
(1), the private branch exchange (PBX) (2), and the public network mobile terminal (PS _C ) (4 _C ) have the same configuration as the public exchange network (CCN) (1) shown in FIG. ) Has
The subscriber data transfer unit (13) shown in FIG. 2 is omitted, and the private branch exchange (PBX) shown in FIG.
In the central controller (CC) (22) of (2), instead of the CDB processing unit (222) and the location registration requesting unit (223) in FIG. 2, a PDB processing unit (228) and a location registration requesting unit ( 229) is provided and FIG.
The shared mobile terminal (PS _CP ) (4 _CP ) shown in FIG.
The public network information transmission unit (42) shown in is not provided.

The shared mobile terminal (PS _CP ) (4 _CP )
As in the case of the public network mobile terminal (PS _C ) (4 _C ), the frequency of the control channel is set to f _CC for the public switched network (CCN) (1) and the private branch exchange (41) by using the public private branch switching unit (41). by switching to and f _CP for PBX) (2),
Public switched network (CCN) (1) and private branch exchange (PB)
X) (2) is provided with a public premises switching unit (41) capable of communicating.

In FIGS. 7 to 9, the shared portable terminal (P
S_CP) (4_CP) Is available on the public switched network (CCN) (1)
Located in any public network zone within the Noh area
A public network (not shown) installed in the switching network (CCN) (1)
Public network base station (CS_C) (3 _C) From the control channel
(Frequency f_CC) To receive various notification information sent via
I believe.

[0110] The shared mobile terminal (PS _CP) in (4 _CP) private branch exchange accommodating the (PBX) (2), a database for local area network terminal (PDB) sharing mobile terminal _{(233) (PS CP) (} 4 _The mobile terminal identification information (ID _PS ) and public network identification information (ID _CN ) have been registered in correspondence with the private network telephone number (DN _P ) of _CP ), but the private network zone number (ZN _P ) has not been registered. The public network registration identification information (REG) is stored in the public switched network (CC) via the private branch exchange (PBX) (2) by the shared mobile terminal (PS _CP ) (4 _CP ).
N) A logic "0" indicating that location registration is not requested in (1)
Is set to.

At present, the location registration request signal [ca
(ID _PS , DN _P )] sender shared mobile terminal (P
S _CP ) (4 _CP ) is a database for internal network terminals (PDB)
It is not registered in (233).

Such a shared portable terminal (PS_CP) (4_CP)
Is within the communicable area of the private branch exchange (PBX) (2).
If you move to the desired internal network zone, the public network base station (CS
_C) (3_C) Various notification information sent from
No. and shared mobile terminal (PS _CP) (4_CP) Public structure
The internal switching unit (41) uses the same process as described above to
From the state where communication is possible within the public network zone, within the private network zone
Switch to the state where communication is possible.

[0113] shared a mobile terminal (PS _CP) (4 _CP), in order to request the location registration due to the movement of the local area network zone from the public network zone, shared a mobile terminal (PS _CP) (4 _CP) to the specific A location registration request signal [ca] including the mobile terminal identification information (ID _PS ) similar to that of the mobile terminal for private network (PS _P ) (4 _P ).
(ID _PS , DN _P )] is generated and transmitted via the switched control channel (frequency f _CP ).

In the private branch exchange (PBX) (2),
The base station for the private network (CS _P ) (3 _P ) receives the location registration request signal [ca (ID _PS , DN _P )] transmitted from the shared mobile terminal (PS _CP ) (4 _CP ), and the base station Control circuit (CSC) (24) and network (NW) (2)
1) to the central controller (CC) (22).

The central controller (CC) (22) sends a location registration request signal [c] from the base station for the internal network (CS _P ) (3 _P ).
a (ID _PS , DN _P )], the location registration requesting unit (229) is activated.

The activated position registration request unit (229)
A mobile terminal added to the transmitted position registration request signal [ca (ID _PS , DN _P )] by referring to the private network terminal database (PDB) (233) in the main memory (MM) (23) After confirming that the identification information (ID _PS ) has been registered [authentication process], the public network identification information (identifying the public switched network (CCN) (1) corresponding to the mobile terminal identification information (ID _PS ) ( If you identify that your ID _CN ) is registered,
The mobile terminal of the transmission source of the position registration request signal [ca (ID _PS , DN _P )] is not the private network mobile terminal (PS _P ) (4 _P ) but the shared mobile terminal (PS _CP ) (4 _CP ). That is, and then refers to the registered public network registration identification information (REG) corresponding to the mobile terminal identification information (ID _PS ) [step S81 in FIG. 8], and the public network registration identification information (REG) is logical. When it is identified that it is set to "0" [step S82 in FIG. 8], the public switched network (CCN) (1) is requested to request the location registration of the shared portable terminal (PS _CP ) (4 _CP ). Step S83 in FIG. 8], a database for a local network terminal (PD
B) (233) generates a subscription confirmation signal [cb (DN _C )] and sends it to the office line (11) via the network (NW) (21) and the office line trunk (CBT) (25).

The location registration request unit (229) uses the subscriber data (SD) for the shared portable terminal (PS _CP ) (4 _CP ).
_P ) is already held, but if it is necessary, the information for requesting the transfer of the subscriber data (SD _C ) held by the public switched network (CCN) (1) is added to the subscription confirmation signal [cb (I
D _PS )], but this time subscriber data (SD _C )
Shall not be requested.

The joining confirmation signal [cb (D
N _C )] is connected to the public switched network (CC
N) is transferred to (1). Public Switched Network (CCN) (1)
In the public network location registration unit (12),
Receive the subscription confirmation signal [cb (DN _C )] arriving from
When analyzed, public network database (CNDB) (16)
The public network telephone number (DN _C ) contained in the subscription confirmation signal [cb (DN _C )] is referred to the public network database (CN).
DB) (16) identifies that it is already registered in the public mobile network (PS _CP ) (4 _CP ) on the public switched network (CCN).
Confirm that it is stored in (1) [Fig. 8 Step S
84], and activates the local network authentication unit (14).

The activated local network authentication unit (14) extracts an authentication random number (RN) by a known procedure in order to authenticate the shared portable terminal (PS _CP ) (4 _CP ) of the location registration request source,
A predetermined calculation is executed using the authentication key (KN) that is held in advance, and the obtained authentication calculation result (AN _C ) and the authentication random number (R
N) and an authentication information transfer signal [cc (RN, A
N _C )] is generated and transferred to the private branch exchange (PBX) (2) via the central office line (11) [step S85 in FIG. 8].

In the private branch exchange (PBX) (2),
The location registration requesting unit (229) sends the authentication information transfer signal [cc (RN, AN _C )] arriving from the office line (11) to the office line trunk (CBT) (25) and the network (N).
W) is received and analyzed via (21), the authentication random number (RN) and the authentication calculation result (AN _C ) are extracted from the authentication information transfer signal [cc (RN, AN _C )], and the recognition execution unit (22)
4) Start up.

The activated recognition execution unit (224) receives the authentication request signal [cd (RN)] including the authentication random number (RN) extracted from the authentication information transfer signal [cc (RN, AN _C )].
To generate a network (NW) (21), a base station control circuit (CSC) (24), and a private network base station (C).
S _P) (3 _P) shared mobile terminal via the (PS _CP) (4
_CP ).

The shared portable terminal (PS _CP ) (4 _CP ) extracts the authentication random number (RN) from the authentication request signal [cd (RN)] transferred from the private branch exchange (PBX) (2) and holds it in advance. Perform a predetermined operation using the authentication key (KN),
An authentication response signal including the obtained authentication calculation result (AN) [c
e (AN)] is generated and returned to the private branch exchange (PBX) (2).

In the private branch exchange (PBX) (2),
The recognition execution unit (224) uses the shared mobile terminal (PS _CP ) (4
_The authentication calculation result (AN) is extracted from the authentication response signal [ce (AN)] returned from _CP ), and the public switched network (CCN) is extracted.
Authentication information transfer signal [cc (RN,
AN _C )], the authentication calculation result (AN _C ) extracted from A _C )] is checked, and when it is confirmed that the two match, the shared mobile terminal (PS _CP ) (4 _CP ) is authenticated [step S86 in FIG. 8],
A location registration acceptance signal [cf] indicating the completion of authentication of the shared mobile terminal (PS _CP ) (4 _CP ) is generated, and the network (NW) is generated.
(21), to the shared portable terminal (PS _CP ) (4 _CP ) via the base station control circuit (CSC) (24) and the public network base station (CS _C ) (3 _C ).

The private branch exchange (PBX) (2) sends an authentication completion signal [cn] to the public exchange network (CCN) (1).
(DN _C )], the public switched network (CCN)
(1) uses the public network zone number (ZN _C ) in the public network database (CNDB) (16) as the private branch exchange (PB).
X) By updating the identification information of (2), the location registration of the shared portable terminal (PS _CP ) (4 _CP ) is executed [step S87 in FIG. 8].

The location registration request unit (229) of the private branch exchange (PBX) (2) activates the PDB processing unit (228), and the shared mobile terminal (PDB) (233) in the private network terminal database (PDB) (233) is activated. PS _CP ) (4 _CP ) [mobile terminal identification information (ID _PS )] public network registration identification information (RE
G) is changed to the logic "1" [step S8 in FIG. 8]
8].

The private branch exchange (PBX) (2) is a private branch exchange.
The position registration unit (221) is activated. Activated campus location
The registration unit (221) is a shared mobile terminal (PS_CP) (4_CP)
Public network base station (CS_C) (3_C) From
Mobile terminal (PS_CP) (4 _CP) Existing internal network zone number
(ZN_P) Is identified and the PDB processing unit (228) is activated.
Data for the internal network terminal in the main memory (MM) (23)
Database (PDB) (233), shared portable terminal (PS
_CP) (4_CP) Mobile terminal identification information (ID_PS) Corresponding to
Store.

As described above, the public switched network (CCN) (1)
Shared mobile terminal (PS _CP ) (4 _CP ) moved from the communicable area of the private branch exchange (PBX) (2) to the communicable area of the private branch exchange (PBX) (2)
From, the initial location registration for the public switched network (CCN) (1) and the private branch exchange (PBX) (2) is completed.

In such a state, the shared portable terminal (PS _CP )
When (4 _CP ) moves to another private network zone number (ZN _P ) in the private branch exchange (PBX) (2), the shared mobile terminal (P
S _CP ) (4 _CP ) is the public network telephone number (DN
Transmits a location registration request signal including a _C) [ca (DN _C)].

In the private branch exchange (PBX) (2),
When the location registration request unit (229) receives and analyzes the location registration request signal [ca (DN _C )] in the same manner as described above, and this time refers to the internal network terminal database (PDB) (233) [Fig. 8 Step S81], shared mobile terminal (P
S _CP ) (4 _CP ) When the public network registration identification information (REG) corresponding to the mobile terminal identification information (ID _PS ) is set to logic “1” (step S82 in FIG. 8), the shared mobile Terminal (PS _CP ) (4 _CP ) is already in the public switched network (CC
N) (1) is identified as having been requested for location registration, and location registration processing for the public switched network (CCN) (1) [Fig.
The premise location registration unit (221) is activated without executing steps S83 to S88].

The activated indoor location registration unit (221)
Similar to the above, shared mobile terminals (PS _CP) (4_CP) Move
Previous internal network zone number (ZN_P) Identify and CDB process
Part (222) is started, and the internal network terminal database
(PDB) (233), shared mobile terminal (PS_CP) (4
_CP) Mobile terminal identification information (ID_PS) Corresponding to
Local network zone number (ZN_P) Is updated.

Private branch exchange (PBX) (2) communication possible area
Existing shared mobile terminals (PS) _CP) (4_CP) From public
The outgoing connection to the public switched network (CCN) (1) is a private network
Obi terminal (PS_P) (4_P) As well as outgoing connections from
Called party's telephone number (DN
_D) Is selected, the known procedure is performed.

FIG. 5 shows an incoming connection from the public switched network (CCN) (1) to the existing shared portable terminal (PS _CP ) (4 _CP ) within the communicable area of the private branch exchange (PBX) (2). A public switched network (CCN) is performed by the same process as shown.
(1) An incoming call signal [aa (DN _S + DN _C )] in which the above-mentioned special number (DN _S ) is added to the telephone number (DN _C ) of the shared mobile terminal (PS _CP ) (4 _CP ) is a private branch exchange. (PB
X) (2), and the incoming call signal [aa (DN _S + D
N _C )] is received, the private branch exchange (PBX) (2) activates the public network receiving unit (227), and the public network telephone number (D
N _C ) refers to subscriber data (SD _CP ) not shown in the figure to retrieve the private network telephone number (DN _P ) or mobile terminal identification information (ID _PS ) of the shared mobile terminal (PS _CP ) (4 _CP ). After that, the internal network terminal database (PDB) (233)
The existing private network zone number (ZN _P ) of the shared mobile terminal (PS _CP ) (4 _CP ) is extracted with reference to the above procedure, and the procedure is executed according to a known procedure, so the details are omitted.

Next, the shared portable terminal (PS _CP ) (4) located within the communicable area of the private branch exchange (PBX) (2).
_{When the CP} moves to the communicable area of the public switched network (CCN) (1), the shared mobile terminal (PS _CP ) (4 _CP ) has been transmitted from the base station for the private network (CS _P ) (3 _P ) so far. The various notification information that has been sent cannot be received.

Shared mobile terminal (PS_CP) (4_CP) Is on campus
Network base station (CS_P) (3_P) Receives various notification information from
When it detects that it has become unreliable, it is a mobile terminal for public networks.
(PS _C) (4_C), As in
(41) is activated and communication is possible within the existing internal network zone.
From the normal state to the state where communication is possible within the public network zone
Location registration required for public switched network (CCN) (1)
Request signal [da (DN_C)] Is sent.

Location registration request signal [da (DN_C)]
The trusted public switched network (CCN) (1) is as shown in FIG.
Similarly, refer to the public network database (CNDB) (16).
Common mobile terminal (PS_CP)
(4_CP) [Mobile terminal identification information (ID _PS)]
The recorded public network zone number (ZN_C) Is a private branch exchange (PB
X) If the identification information of (2) is identified, the position registration
Public network zone number (ZN_C) Parse
Until now, in the private branch exchange (PBX) (2) private zone
Shared mobile terminal (PS)_CP) (4_CP) Is on the premises
It is determined that the vehicle has moved out of the zone [step S9 in FIG. 9].
1], according to a known procedure, the shared portable terminal (PS_CP)
(4_CP) Position registration processing is executed and [Fig.
S92], and activates the registration deletion instruction section (15).

The activated registration deletion instruction section (15) generates a location registration cancellation instruction signal [db (DN _C )] including the telephone number (DN _C ) of the shared portable terminal (PS _CP ) (4 _CP ). , Private branch exchange (PBX) via office line (11)
Transfer to (2).

In the private branch exchange (PBX) (2),
The central controller (CC) (22) is a public switched network (CC).
N) Location registration cancellation instruction signal [db] transferred from (1)
(DN _C)] To the office line (11) and the office line trunk (CB
T (25) and network (NW) (21)
When received, the location registration request unit (229) is activated.
It

The activated location registration request unit (229)
When the telephone number (DN _C ) is extracted from the received position registration cancellation instruction signal [db (DN _C )], the shared mobile terminal (PS) is referred to by referring to the subscriber data (SD _CP ) (not shown) as described above. After searching the private network telephone number (DN _P ) or mobile terminal identification information (ID _PS ) of _CP ) (4 _CP ), the private network telephone number (DN _P ) is referred to by referring to the private network terminal database (PDB) (233). _P ) or mobile terminal identification information (I
D _PS) mobile terminal identification information is registered in association (I
After searching for D _PS ), the PDB processing unit (228) is activated, and the public network registration identification information (R) corresponding to the detected private network telephone number (DN _P ) or mobile terminal identification information (ID _PS ).
It transmits an instruction to set EG) to logic "0".

The activated PDB processing unit (228) outputs the registered public network registration identification information (REG) corresponding to the designated private network telephone number (DN _P ) or portable terminal identification information (ID _PS ). Set to logic "0".

From the above, the shared portable terminal (PS _CP ) (4
_CP ) does not exist within the communicable area of the private branch exchange (PBX) (2). As is clear from the above description, according to the embodiment shown in FIGS. 7 to 9, the shared portable terminal (PS) accommodated in the public switched network (CCN) (1) and the private branch exchange (PBX) (2) is used. _CP ) (4 _CP ) moves from the private branch exchange (CCN) (1) to the private branch exchange (PB) even when it moves to the communication area of the private branch exchange (PBX) (2).
X) (2), it becomes possible to communicate as if it were directly accommodated in the public switched network (CCN) (1), and the public network base station is within the communicable area of the private branch exchange (PBX) (2). There is no need to install a part of the public switched network (CCN) (1) such as (CS _C ) (3 _C ).

2 to 9 are merely embodiments of the present invention, and the configurations of, for example, the public exchange network (100), the private branch exchange network (200), and the portable terminal (300) are as shown. The present invention is not limited to the above, and various modifications can be considered, but the effect of the present invention does not change in any case.

[0142]

As described above, according to the present invention, in the communication system, when the portable terminal accommodated in the public switched network is used in the private branch exchange network, the public switched network communicates with the portable terminal. It is no longer necessary to install dedicated communication equipment within the private switching network, and it becomes possible to communicate with the public switching network via the private switching network, which greatly improves the economic efficiency of the public switching network and also enables public switching. Services that use mobile terminals accommodated in the network within the private branch exchange network can be greatly expanded.

Further, in order to authenticate the portable terminal which requests the location registration, it becomes unnecessary to notify the private exchange network of the confidential information (authentication key etc.) of the public exchange network, and the reliability of the public exchange network is improved.

[Brief description of drawings]

FIG. 1 is a diagram showing the principle of the present invention.

FIG. 2 is a diagram showing a communication system according to an embodiment of the present invention.

FIG. 3 is a diagram showing an example of a public network portable terminal location registration process in FIG. 2;

FIG. 4 is a diagram showing an example of a mobile terminal originating connection process for a public network in FIG.

FIG. 5 is a diagram showing an example of an incoming call connection process of a mobile terminal for public network in FIG.

FIG. 6 is a diagram showing an example of a process of canceling location registration of a mobile terminal for public networks in FIG.

FIG. 7 is a diagram showing a communication system according to another embodiment of the present invention.

8 is a diagram showing an example of a shared mobile terminal location registration process in FIG.

9 is a diagram showing an example of a shared mobile terminal location registration cancellation process in FIG. 7.

FIG. 10 is a diagram showing an example of a conventional communication system.

FIG. 11 is a diagram showing another example of a conventional communication system.

FIG. 12 is a diagram showing an example of a wireless channel of a mobile terminal.

FIG. 13 is a diagram showing an example of an authentication process of a mobile terminal.

[Explanation of symbols]

1,100 Public switched network (CCN) 2 Private branch exchange (PBX) 3 _C Public network base station (CS _C ) 3 _P Private network base station (CS _P ) 4 _C Public network mobile terminal (PS _C ) 4 _CP Shared mobile terminal (PS _CP ) 4 _P Private network mobile terminal (PS _P ) 5 Trunk line 11 Office line 12 Public network location registration unit 13 Subscriber data transfer unit 14 Private network authentication unit 15 Registration deletion instruction unit 16 Public network database (CNDB) 21 Network (NW) 22 Central control unit (CC) 23 Main storage unit (MM) 24 Base station control circuit (CSC) 25 Station line trunk (CBT) 41 Public premises switching unit 42 Public network information transmitting unit 101 Position Registration function 200 Private branch exchange network 201 Location registration function 202 Public network location registration storage means 203 Location registration request means 221 Private location registration section 222 CDB processing sections 223, 22 Location registration request unit 224 Recognition execution unit 225 Public network transmission unit 226 Billing information transfer unit 227 Public network reception unit 228 PDB processing unit 231 Public network terminal premises database (CDB) 232 Affiliated public network table (CNT) 233 Private network terminal Database (PDB) 300 Mobile terminal

Claims (8)

[Claims] 1. A location registration function (10) for accommodating a private branch exchange network and a mobile terminal and for registering an existing location of the mobile terminal.
1) a public switched network (100), a private switched network (200) accommodating a mobile terminal and having a location registration function (201) for registering the existing location of the mobile terminal, and the public switched network (200). In a communication system having a mobile terminal (300) capable of communicating with both of 100) and a private branch exchange network (200), the mobile terminal (300) is provided in the private branch exchange network (200).
Are accommodated in the public switched network (100), and the public switched network (10) is passed through the private branch switched network (200).
0) the public network location registration storage means (202) for storing that the location registration has been requested, and the location registration request source mobile terminal (202) when the location registration is requested from the mobile terminal (300). 300) is housed in the public switched network (100), and the portable terminal (300) is the public network location registration storage means (202).
If it is identified as unstored in the private branch exchange network (200)
A location registration function (201) within the public switching network (10)
The location registration function (101) in (0) requests location registration, and the location registration request source mobile terminal (300) is accommodated in the public switched network (100) and the mobile terminal (100) 300 is the public network location registration storage means (20)
When it is identified as stored in 2), the private branch exchange network (20
A mobile terminal accommodating method characterized in that a location registration requesting means (203) for requesting location registration is provided only to the location registration function (201) in 0). 2. The location registration requesting means (203) responds to the location registration request transmitted by the mobile terminal (300),
When the own mobile terminal (300) has added identification information indicating that it is accommodated in the public switched network (100), the mobile terminal is based on the identification information added to the received location registration. (300) is the public switched network (1
The portable terminal accommodating method according to claim 1, wherein the portable terminal accommodating method according to claim 1 is recognized as being accommodated in (00). 3. The location registration requesting means (203) includes the public network location registration storing means (202), and the location registration request source mobile terminal (300) includes the public switched network (10).
Information indicating whether or not the mobile terminal (300) is accommodated in the public switched network (100).
When information indicating whether or not location registration has been requested is stored in the public switched network (100), based on the identification information stored in the public network location registration storage means (202),
The mobile terminal accommodating system according to claim 1, wherein the mobile terminal (300) recognizes that the mobile terminal (300) is accommodated in the public switched network (100). 4. The location registration requesting means (203), when requesting location registration from the public switched network (100),
The transfer of subscriber data indicating the attribute of the mobile terminal (300) is requested to the public switched network (100), and the subscriber data transferred from the public switched network (100) is transferred to the location registration request source. The mobile terminal accommodating system according to claim 1, wherein the mobile terminal accommodating system is used for managing the mobile terminal (300). 5. The location registration requesting means (203), an authentication random number for authenticating the mobile terminal (300) of the location registration request source as the subscriber data from the public exchange network (100), and the authentication. When the authentication calculation result obtained by performing a predetermined calculation using a predetermined authentication key is transferred, the authentication random number is transferred to the mobile terminal (300) of the location registration request source.
By transferring the authentication random number to the authentication calculation result returned from the mobile terminal (300) of the location registration request source by collating the authentication random number with the authentication calculation result transferred from the public exchange network (100), The mobile terminal accommodating method according to claim 1, wherein the mobile terminal (300) that is the source of the location registration request is authenticated. 6. The location registration function (101) in the public switched network (100) is configured so that the mobile terminal (300), which has already been registered in the private switched network (200), is registered in the private switched network (300). If the location registration is requested from other than 200), an instruction to change the location registration requested stored in the public network location registration storing means (202) to the private exchange network (200) is sent to the private branch exchange network (200). The private branch exchange network (200) is the public exchange network (10).
0) receiving the location registration change instruction, the portable terminal (300) is accommodated in the public switched network (100), and the public switched via the private branch exchange network (200). 2. The portable terminal accommodating method according to claim 1, wherein the memory whose location registration has been requested for the network (100) is deleted. 7. The public switched network (100) is the public switched network (100) existing in the private branch exchange network (200).
An incoming call is made to the mobile terminal (300) housed in the private branch exchange network (200) and the mobile terminal (3) is connected to the private branch exchange network (200).
00), the accommodation information indicating that the reception portable terminal (300) is accommodated in the public switched network (100) is added to the reception portable terminal (3).
00) telephone number to be added to the private branch exchange network (200)
The private branch exchange network (200) is connected to the public exchange network (10).
2. The mobile terminal accommodating system according to claim 1, wherein the mobile terminal accommodating method makes an incoming call connection to the incoming mobile terminal (300) based on the telephone number with accommodation information transferred from (0). 8. In the private branch exchange network (200), a mobile terminal (300) whose location registration requesting means (203) has requested location registration to the public exchange network (100) is the public exchange network (100). ) To the originating mobile terminal (300) when the public switched network (100) is completed.
The billing information required to calculate the call charge for
The mobile terminal accommodating method according to claim 1, wherein the transfer is made to the public switched network (100).