JP3131867B2 - Private branch exchange for mobile communication terminals - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a private branch exchange (PBX) for a mobile communication terminal connected to a mobile communication network accommodating, for example, an automobile telephone or a portable telephone.

[0002]

2. Description of the Related Art Currently used communication networks include, for example, a public switched telephone network (PSTN: Publ) as shown in FIG.
ic Switched Telephone Network) and Integrated Services Digita Network (ISDN)
l) and a mobile communication network 20 such as a mobile phone or a mobile phone. The fixed communication network 10 includes a public office telephone terminal 13 connected via a transit exchange (TS) 11 and a local exchange (LS) 12, a PBX-accommodated telephone terminal 15 connected via a PBX 14, and the like. The mobile communication network 20 is a mobile switching controller (MSC).
21, base station control unit (BSC) 22, base station (BTS)
The communication network includes mobile communication terminals 24 and the like that are connected by wireless communication via the communication terminal 23.

[0005] A transit exchange 11 in the fixed communication network 10 and a mobile switching control unit 2 in the mobile communication network 20.
1 can provide not only communication between the mobile communication terminal and the mobile communication terminal, but also communication service between the mobile communication terminal and the fixed communication network telephone terminal. As long as the user is within the communication area, communication with an arbitrary fixed communication network telephone terminal can be performed. In addition, the installation of the fixed communication network 10 requires a cost for the initial equipment. Since the cost is lower than the line installation fee, a fixed communication network 10 is installed in the area where many lines are used,
When only a fractional line is used, the mobile communication network 20 is used for economical line use.

[0004]

However, in a conventional communication network, for example, it is not possible to use a line such as a fixed communication network 10 in a depopulated area or the like, and a mobile communication network is not considered. When a communication network is constructed in an area where the number of lines used is large in order to use the network 20, it is difficult to attach the fixed communication network 10 which requires a cost to the initial equipment for the above-mentioned reason. There was a problem that the construction of the line was difficult due to the above problem. Meanwhile, the conventional fixed communication network 10 includes a device called a PBX 14 for connecting between a line and an extension or between extensions.
By installing 4, the line is effectively used. However, the conventional PBX 14 has a fixed communication network 10
To use the mobile communication network 20 as it is.
Could not be used.

An object of the present invention is to solve the above-mentioned problems and to provide a PBX for a mobile communication terminal which can be used by connecting to a mobile communication network.

[0006]

According to an aspect of the present invention, there is provided a base station control unit connected to a mobile switching control unit, a base station controlled by the base station control unit, In a mobile communication network including a mobile terminal that performs communication, a PBX for a mobile communication terminal includes a plurality of wireless communication trunk units that secure an external line by performing wireless communication between the base stations. The external line secured by the wireless communication trunk unit is selectively connected to an arbitrary communication terminal.

[0007] The wireless communication trunk unit is a base station based on a plurality of individual numbers assigned to each communication terminal and a representative number assigned to a predetermined number of wireless communication trunk units. Are connected to each other, and when connecting by a plurality of individual numbers assigned to each communication terminal, the connection is made by a wireless communication trunk unit corresponding to each individual number, When a connection is made with a representative number given to a predetermined number of wireless communication trunk units, the empty trunks in each of the wireless communication trunk units are sequentially selected and connected.

[0008]

According to the present invention, a plurality of wireless communication trunk units secure a plurality of external lines with a base station by wireless communication, and connect the secured external line to an arbitrary communication terminal to connect to a mobile communication network. A PBX that can be connected and used can be obtained. In addition, this PBX is
A line connection with the base station is established based on a plurality of individual numbers assigned to each communication terminal accommodated in X and a representative number assigned to a predetermined number of wireless communication trunk units. If the call is made by individual number,
The connection is made by the wireless communication trunk unit corresponding to the individual number, and when a call is made by the representative number, the connection is made by the empty wireless communication trunk unit.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a mobile communication terminal P of this embodiment.
FIG. 2 is a diagram showing a schematic configuration of a communication network including a BX1;
FIG. 2 is an enlarged view of the private branch exchange for the mobile communication terminal in FIG. 1. In FIGS. 1 and 2, the same elements as those of the conventional example shown in FIG. 3 are denoted by the same reference numerals.

The PBX 1 for a mobile communication terminal according to the present embodiment comprises:
In accordance with the flow of convergence between wired and wireless, a PBX that is usually connected to a fixed communication network and used is provided with a function as a mobile terminal in a trunk circuit portion of the PBX. It is configured to be connectable to. Specifically, the PBX 1 for the mobile communication terminal of the present embodiment
As shown in FIG. 2, a PBX main body is provided with a predetermined number of wireless trunk interfaces 2 serving as a wireless communication trunk unit, and a plurality of PBX-accommodated telephone terminals 25 and a relay stand 26 are provided.

The PBX 1 for a mobile communication terminal includes a PB1 connected to a conventional fixed communication network.
Similarly to X14, the individual call dial numbers corresponding to the provided wireless trunk interfaces 26 are set, respectively, and are grouped by a predetermined number, and the representative call dial numbers are set for each group. Thus, each group unit is configured as a mobile communication terminal group. In the terminating connection by calling the representative number, a predetermined number of wireless trunk interfaces 2 constituting one group are provided with a group hunting function for sequentially selecting empty trunks, so that incoming calls can be received on empty trunks. As a result, an attendant console call function and an additional dial-in function by individual call and representative number call are realized. Further, in the present embodiment, since it is necessary to distinguish between an incoming connection by an individual number and an incoming connection by a representative number, the incoming information includes identification information indicating which dial call is made. Shall be.

Next, the PBX for a mobile communication terminal of this embodiment
1 will be described.

(Dial-in connection to a PBX extension using an individual number to the PBX 1) For example, a wireless trunk interface 2 to which a mobile terminal number is allocated from a public office telephone terminal 13 of a fixed communication network (public switched telephone network). Is received from the local exchange 12 through the intermediate exchange 11 by calling the individual number from the public office telephone terminal 13.
-Mobile switching controller 21-base station controller 22-base station 2
3 and arrives at the wireless trunk interface 2. Then, the PBX 1 for the mobile communication terminal detects a trunk incoming call and arrives at the extension number corresponding to the wireless trunk interface 2. As described above, in the case of an incoming call using an individual number assigned to the wireless trunk interface 2, the extension number corresponding to each wireless trunk interface 2 (for example, the wireless trunk interface 2)
With respect to a, the call is received by the PBX accommodation telephone terminal 25a).

(Connection of relay station with representative number to PBX 1) In the same manner as in the above-mentioned example, a representative number is used for the mobile trunk interface 2 to which the mobile terminal number is allocated from the public office telephone terminal 13 of the fixed communication network. The incoming call is sent to the mobile switching control unit 2 via the local exchange 12-transit exchange 11 by calling a representative number from the public office telephone terminal 13.
1, the mobile switching control unit 21 selects an empty trunk from the hunting groups (in this case, four of the wireless trunk interfaces 2a to 2d), and receives a call via the base station control unit 22-base station 23. Do. That is, in the example shown in FIG. 2, since the wireless trunk interface 2a is in use (during a call), an incoming call is made to the wireless trunk interface 2b. Then, the PBX 1 for the mobile communication terminal becomes the wireless trunk interface 2b.
When the incoming call is the representative number, the incoming call arrives at the relay console 26, and then is transmitted to the PBX-accommodated telephone terminal 25 accommodated in the PBX 1 for the mobile communication terminal at the request of the caller. Connected.

(Outgoing Connection from PBX Extension) For outgoing calls from the extension of the PBX 1 for the mobile communication terminal, the wireless trunk interface 2 is used as a common device.
For example, when an outgoing connection request is made from the PBX accommodated telephone terminal 25b shown in FIG. 2 to the public office telephone terminal 13 in the fixed communication network, the PBX 1 for the mobile communication terminal is a wireless trunk interface that is an empty trunk. 2c is selected, and the wireless trunk interface 2c is treated in the same manner as the mobile communication terminal to connect to the base station 23.

As described above, in this embodiment, the communication network can be easily constructed by connecting the mobile communication network by positioning the PBX 1 for the mobile communication terminal as a collective terminal. For example, even when providing a communication facility at a temporary event venue such as an exhibition hall or constructing a communication network in a depopulated area or the like, a line can be provided at low cost.

[0017]

As is apparent from the above description, according to the present invention, a PBX which can be used by connecting to a mobile communication network can be obtained, so that a communication network can be easily constructed. . Further, since a cable or the like is not used for constructing a communication network, there is an effect that the initial cost for installing a line can be greatly reduced.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a schematic configuration of a communication network including a private branch exchange for a mobile communication terminal according to an embodiment;

FIG. 2 is an enlarged view of a private branch exchange for a mobile communication terminal in FIG. 1;

FIG. 3 is a diagram showing a connection relationship between a fixed communication network and a mobile communication network in a conventional example.

[Explanation of symbols]

Reference Signs List 1 private branch exchange for mobile communication terminal 2 wireless trunk interface (wireless communication trunk unit) 10 fixed communication network 11 transit exchange (TS) 12 subscriber exchange (LS) 13 telephone terminal for public office 14 PBX (private exchange) 15 PBX accommodation Telephone terminal 20 Mobile communication network 21 Mobile switching controller (MSC) 22 Base station controller (BSC) 23 Base station (BTS) 24 Mobile communication terminal 25 PBX-accommodated telephone terminal 26 Attendant console

Claims (3)

(57) [Claims] 1. A wireless communication trunk unit for performing wireless communication with a base station controlled by a base station control unit to secure an external line, wherein the external line secured by the wireless communication trunk unit is provided. Is selectively connected to an arbitrary communication terminal. 2. The base station according to claim 2, wherein the wireless communication trunk unit is based on a plurality of individual numbers assigned to each communication terminal and a representative number assigned to a predetermined number of wireless communication trunk units. 2. The private branch exchange according to claim 1, wherein the private branch exchange is connected to a line. 3. When the wireless communication trunk unit is connected by a plurality of individual numbers assigned to each communication terminal, the wireless communication trunk unit is connected by a wireless communication trunk unit corresponding to each individual number. 3. The mobile communication terminal according to claim 2, wherein when the connection is made by using the representative number assigned to the wireless communication trunk unit, the empty trunk in each of the wireless communication trunk units is sequentially selected and connected. Private branch exchange.