JP2594721B2 - Multi-channel access system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a public switched telephone network (PS).
TN), which is capable of communicating with a telephone of the same user.

[0002]

2. Description of the Related Art FIG. 3 is a system configuration diagram showing, for example, a conventional multi-channel access system. In the figure, 1a is a mobile station as a terminal station of a first group of users (user a) of the multi-channel access system, and 1b is a mobile station of a second group of users (user b) also as a terminal station. Bureau. Similarly, 2a and 2b are command stations as terminal stations of the user a and the user b, respectively.

[0003] Reference numeral 3 denotes a space between mobile stations 1a (1b) of the same user, or between a mobile station 1a (1b) and a command station 2a (2b).
b) and the same user's telephone, which will be described later, and the mobile station 1a (1b) and the command station 2a (2b).
A control station device also controls communication with the control station device 4.

[0004] Reference numeral 5 denotes a public network connection additional device to which the control station device 3 is connected. Reference numeral 6 denotes a supervisory control device of the public network connection additional device 5. Reference numeral 7 denotes a public line network accommodating the public network connection additional device 5, and reference numeral 8 denotes a terminal board for accommodating the public network connection additional device 5 in the public line network 7.
9a and 9b are telephones of the user a and the user b accommodated in the public line network 7.

[0005] Reference numeral 10 denotes a control channel common to all users for controlling the radio channel of the multi-channel access system. Reference numerals 11a and 11b denote mobile stations 1 of each user.
a, 1b and a designated channel 2a, 2b. 12a, 1
2b is an audio channel signal between the control station 3 and the public network connection additional device 5, and 13 is a control signal.

Next, the operation will be described. First, the terminal station 1a or 2a of the user a requests the control station apparatus 3 to allocate a communication channel using the control channel 10.

The control station device 3 receiving the call channel request signal selects a vacant call channel (for example, the call channel 11a) in response to the signal, and designates the call channel 11a. The signal is transmitted to all the terminal stations 1 of the user a via the control channel 10.
a and 2a.

Since a bit for designating the first terminal station group indicating the user a is added to the signal for specifying the communication channel, each terminal station of the user b, which is the second terminal station group, is added. In 1b and 2b, it can be confirmed that the signal is not addressed to the group to which it belongs.

The control station device 3 starts the relay operation by the communication channel 11a simultaneously with the transmission of the communication channel designation signal, and the terminal stations 1a and 2a of the user a control the signal transmission / reception channel of the own station. Switching from the channel 10 to the designated communication channel 11a. Thereby, each terminal station 1 of the user a via the control station device 3
Calls between a and 2a become possible.

The terminal station 1a or 2a of the user a
When the user wants to talk with the telephone 9a of the user a, the control line 10 is connected to the control station 3 via the public line network 7.
Sends a signal requesting a connection to When receiving the request signal, the control station device 3 sends a control signal 13 to the public network connection additional device 5 to cause the telephone set 9a of the user a to be called.

When the telephone 9a responds, a response signal is returned to the control station device 3 via the public network connection additional device 5, and the control station 3 receiving the response signal transmits the vacant communication channel 11a.
Is assigned to the user a, and the control channel 10 notifies the terminal 1a and 2a of the user a.

Each of the terminal stations 1a and 2a of the user a switches its own signal transmission / reception channel from the control channel 10 to the designated communication channel 11a in the same manner as described above. The user talks with the telephone 9a of the user a.

Similarly, the telephone 9a of the user a is
If you want to talk to the terminal station 1a or 2a
The connection request signal from a is sent from the public network connection additional device 5 to the control station device 3 as a control signal 13.

When receiving the request signal, the control station device 3 allocates the idle communication channel 11a to the user a, and allocates the idle communication channel 11a to the terminal station 1 of the user a through the control channel 10.
a, 2a, and each terminal station 1a, 2a of the user a changes its own signal transmission / reception channel to its communication channel 11
Switch to a.

The control station device 3 communicates with the communication channel 11
In addition to the designation of a, the control signal 13 sends an off-hook signal to the public network connection additional device 5 to transmit the telephone 9a of the user a.
To the telephone 9 of the user a.
a can be communicated with the terminal station 1a or 2a.

[0016] Japanese Patent Application Laid-Open No. 63-116531 discloses a technique describing a technique related to a conventional multi-channel access system capable of communicating with a telephone housed in a public telephone network.

[0017]

Since the conventional multi-channel access system is configured as described above, one public network connection additional device 5 is required for each control station device 3, and Not only is the economic burden increased, but also the space for installing it is increased.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has as its object to provide a multi-channel access system which does not require a large installation space and can reduce an economic burden.

[0019]

According to a first aspect of the present invention, there is provided a multi-channel access system in which an additional device for connecting to a public network has a serial input / output interface branch unit and a plurality of control station interface units. Is connected to a serial input / output interface branch unit via a control station interface unit.

In the multi-channel access system according to the second aspect of the present invention, a plurality of control station devices are further connected to the control station interface via a serial input / output interface branching device.

[0021]

According to a first aspect of the present invention, there is provided an additional apparatus for connecting to a public network, comprising: a serial input / output interface branching unit for branching a plurality of serial input / output interfaces; By connecting via a control station interface unit, it is possible to connect a plurality of control station devices to one additional device for connection to a public network, no multi-channel space is required, and the multi-channel can reduce the economic burden. Implement an access system.

Further, the serial input / output interface branching device according to the second aspect of the present invention can connect a plurality of control station devices to each control station interface unit of the public network connection additional device, thereby connecting to the public network. A multi-channel access system is realized in which a large number of control station devices can be connected to the additional device for installation, and the installation space and economic burden can be further reduced.

[0023]

[Embodiment 1] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a system configuration diagram showing one embodiment of the invention described in claim 1, and the same or corresponding parts as those of the prior art shown in FIG. .

A serial input / output interface 14 is provided in the public connection addition device 5 and branches the serial input / output interface into a plurality of control station devices 1 (1) to 1 (n) (in this case, n branches). It is a branch.

Reference numerals 15 (1) to 15 (n) denote the control devices 1 (1) to 15 (n).
1 (n), the serial input / output interface branch units 14 are connected to each other, and the control station devices 1 (1) to
1 (n) is a control station interface section that interfaces with (1).

Next, the operation will be described. Control station device 3
The terminal station 1a (1) or 2a (1) of the user a (1) registered in (1) is the telephone 9a of the same user a (1).
If you want to talk to (1), use terminal station 1a (1) or 2a
(1) is the control station 3 (1) on the control channel 10 (1).
To the public network connection request signal.

Upon receiving this request signal, the control station device 3 (1) notifies the control signal 13 (1) of the effect to the public network connection additional device 5 (1).
Send to In the public network connection additional device 5, the control signal 13
(1) is received by the control station interface unit 15 (1) and input to the serial input / output interface branch unit 14.

The supervisory control device 6 of the public network connection additional device 5
Receives the signal from the serial input / output interface branching unit 14, adds a code for identifying the control station device 3 (1), processes it, and processes the telephone 9a (1) of the user a (1).
Call.

When the telephone 9a (1) answers, a response signal is transmitted from the serial input / output interface branching unit 14 to the control station interface unit 15 (1), and the control signal 13
(1) is sent to the control station device 3 (1).

Upon receiving the control signal 13 (1), the control station device 3 (1) allocates the vacant communication channel 11a (1) to the user a (1), and uses the control channel 10 (1). This is notified to the terminal stations 1a (1) and 2a (1) of the user a (1).

Terminal stations 1a (1) and 2a (1) of user a (1)
Is the control channel 1 for the signal transmission / reception channel of the own station.
0 (1) is switched to the designated communication channel 11a (1), and the same user a (1) is switched via the control station 3 (1).
Call with the telephone 9a (1).

Similarly, the telephone 9a of the user a (1)
When (1) wants to talk to the terminal station 1a (1) or 2a (1) of the user a (1), the serial input / output interface branching unit 14 of the public network connection additional device 5 is controlled by the telephone 9a (1). A connection request signal to which a code for identifying the station device 3 (1) is added is received, and is received as a control signal 13 (1) via the control station interface unit 15 (1).
Send to

Upon receiving this request signal, the control station 3 (1) sets the idle communication channel 11a (1) to the user a (1).
To the terminal stations 1a (1) and 2a (1) of the user a (1) on the control channel 10 (1), and the terminal stations 1a (1) and 2a of the user a (1) are notified. (1) switches its own signal transmission / reception channel to the communication channel 11a (1).

At the same time, the control station device 3 (1) sends an off-hook signal with the control signal 13 (1) to the public network connection additional device 5 (1).
To the telephone 9a (1) of the user a (1) to that effect. The monitoring control device 6 of the public network connection additional device 5 includes:
It is received and processed via the control station interface unit 15 (1) and the serial input / output interface branching unit 14, and is notified to the telephone 9a (1) of the user a (1).

Thus, the telephone 9a of the user a (1)
(1) can communicate with the terminal station 1a (1) or 2a (1).

Embodiment 2 FIG. In the above embodiment, the public network connection additional device is provided with a serial input / output interface branching unit for branching the serial input / output interface into serial input / output interfaces for a plurality of control station devices. By adding a serial input / output branching device outside the connection additional device, it becomes possible to connect a larger number of control station devices to one public network connection additional device.

FIG. 2 is a system configuration diagram showing a main part of an embodiment of such an invention according to claim 2;
6 (n) is the serial input / output interface branching device capable of branching into m. The other parts are denoted by the reference numerals corresponding to the corresponding parts in FIG. 1, and the description thereof will be omitted.

As described above, according to this embodiment, the n-branch of the serial input / output interface branching unit 14 in the public network connection additional device 5, and the serial input / output interface branching devices 16 (1) to 16 (n). Nx
m can be branched, and up to n × m control station devices 3 (1, 1) to 3 (n, m) are connected to one public network connection additional device 5.
Can be connected.

Since the basic operation is the same as that of the embodiment shown in FIG. 1, the description is omitted.

[0040]

As described above, according to the first aspect of the present invention, a public network connection additional device is provided with a serial input / output interface branching unit for branching a plurality of serial input / output interfaces. Since a plurality of control station devices are connected to the branching unit via the control station interface unit, it is possible to connect a plurality of control station devices to one public network connection additional device, and the installation space is increased. And a multi-channel access system that can improve the economical efficiency of the system by sharing hardware can be obtained.

According to the second aspect of the present invention, a plurality of control station devices are connected to each control station interface unit of the public network connection additional device via the serial input / output interface branch device. Therefore, it is possible to connect more control station devices to the public network connection additional device, and it is possible to obtain a multi-channel access system capable of further reducing installation space and improving economic efficiency. .

[Brief description of the drawings]

FIG. 1 is a system configuration diagram showing a multi-channel access system according to an embodiment of the present invention.

FIG. 2 is a system configuration diagram showing a main part of an embodiment of the invention described in claim 2;

FIG. 3 is a system configuration diagram showing a conventional multi-channel access system.

[Explanation of symbols]

1a (1) to 1a (n) Terminal station (mobile station) 2a (1) to 2a (n) Terminal station (command station) 3 (1) to 3 (n), 3 (1,1) to 3 (n , m) Control station device 5 Public network connection additional device 7 Public line network 9a (1) to 9a (n) Telephone 10 (1) to 10 (n) Radio channel (control channel) 11a (1) to 11a ( n) Radio channel (call channel) 14 Serial input / output interface branch unit 15 (1) to 15 (n) Control station interface unit 16 (1) to 16 (n) Serial input / output interface branch unit

Claims (2)

(57) [Claims] 1. A terminal station of a plurality of users classified in each group uses a plurality of radio channels jointly, and relays a voice and data through a control station apparatus which controls communication between the terminal stations of the same user. Performs transmission, connects the control station device to a public network via a public network connection additional device, and connects a telephone housed in the public network with a terminal station of the same user as the telephone. In the multi-channel access system enabling communication, the public network connection additional device includes a serial input / output interface branching unit for branching a plurality of serial input / output interfaces, each of which is connected to the serial input / output interface branching unit. A plurality of control station interface sections for interfacing with the control station apparatus, and the plurality of control station apparatuses are connected via the control station interface section. A multi-channel access system connected to the serial input / output interface branch section. 2. The multi-channel access system according to claim 1, wherein a plurality of said control station devices are connected to said control station interface unit via a serial input / output interface branching device.