JPH10126369A - Multiplexer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the multiplexer that is available for operation without causing disable connection on the occurrence of communication requiring emergency. SOLUTION: A time division multiplexer 10 is provided with a connection request reception section 2, a band assignment section 3 that assigns a request source terminal equipment to an available band, a connection control signal 4 that conducts interruption of connection from an operating terminal equipment and conducts connection processing to an emergency terminal equipment, a database 5 that manages presence of emergency communication by terminal equipments, band information used on emergency and a band operating status as data, a setup reception section 6 that receives setting of band information used on terminal connection class/emergency, and an information input section 7 that receives band information used on terminal connection class/emergency. In this case, a class corresponding to the degree of emergency for connection of a contained terminal equipment is assigned, and the operating band is forcibly set if all bands are busy on the connection request of an emergency connection terminal equipment.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multiplexing device used for a high-speed digital line system, and more particularly to a time-division multiplexing device for effectively using a trunk line.

[0002]

2. Description of the Related Art At present, a time division multiplexing apparatus uses a time division multiplex (TDM) for various digital signals.
ex) and time-compressed bidirectional transmission is possible.

In a high-speed digital line type multiplexing apparatus, a user can use a high-speed line by using a high-speed line only for a predetermined period of time or changing a line-to-ground distribution destination according to time. May control the line by a demand assignment connection method.

[0004] The connection method of the trunk line of the time division multiplexing device is roughly classified into a fixed connection method and the demand assignment connection method, and has the following features.

[0005] The fixed allocation method can use a trunk line at any time for all accommodating terminals, but requires a large-capacity total trunk line used by all terminals.

[0006] The demand assignment connection system allows the trunk line to be used effectively, but on the other hand, wins quickly and prevents other terminals from using the trunk line until the band being used first is released by disconnection.

[0007]

As described above, in the demand assignment connection method of the time division multiplexing apparatus, other terminals cannot use the relay line until the band being used first is released by disconnection. Therefore, there is a problem in that even when an emergency communication (for example, a failure report or the like) occurs, the relay line cannot be used if the bandwidth of the relay line is being used by another terminal.

[0008] It is an object of the present invention to provide a multiplexing apparatus that can be operated without making connection impossible when urgent communication occurs.

[0009]

SUMMARY OF THE INVENTION A multiplexing apparatus according to the present invention is a multiplexing apparatus to which a plurality of terminals can be connected using a predetermined band. And an emergency connection means for forcibly setting a band to be used when all the bands are in use at the time of a connection request from the emergency connection terminal.

The emergency connection means includes an input means for inputting information of a terminal connection class / bandwidth information used in an emergency,
Storage means for storing the presence / absence of emergency communication of the terminal, band information used in an emergency, band usage status, etc. as data, and allocating the connected terminal to an available band based on the output of the storage means, and a terminal connection class Is an emergency device,
It may be configured to include a control unit that disconnects the connection with the terminal using the emergency use band and performs a connection process with the emergency terminal.

The multiplexing device may be a time-division multiplexing device for transmitting a digital signal by time-division multiplexing.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The multiplexer according to the present invention can be applied to a time division multiplexer used in a high-speed digital line system.

FIG. 1 is a diagram showing a configuration of a time division multiplexing apparatus according to an embodiment of the present invention, and is an example in which the emergency connection method is applied to a time division multiplexing apparatus.

In FIG. 1, reference numeral 10 denotes a time-division multiplexing device (multiplexing device), 1 denotes a terminal device such as a computer terminal or a private branch exchange connected to the time-division multiplexing device, 2 denotes a connection request receiving unit, and 3 denotes a connection request receiving unit. A band allocating unit that allocates a request source terminal to a usable band, a connection control unit that disconnects a connection with a terminal in use and performs a connection process with an emergency terminal, and 5 that is used in the presence or absence of emergency communication of the terminal and used in an emergency. Bandwidth information, bandwidth usage,
Database (storage means) for managing data as data, 6
Is a setting accepting unit that accepts the setting of the terminal connection class / bandwidth information used in an emergency, and 7 is an information input unit that inputs information of the terminal connection class / bandwidth information used in an emergency.

The bandwidth allocating unit 3, the connection control unit 4, the database 5, the setting receiving unit 6, and the information input unit 7 constitute an emergency connection unit as a whole, and the setting receiving unit 6 and the information input unit 7 serve as input units. The band allocating unit 3 and the connection control unit 4 constitute a control unit.

Hereinafter, the operation of the time division multiplexing apparatus 10 configured as described above will be described.

FIG. 2 is a conceptual diagram for explaining the function of the time division multiplexing device 10.

In FIG. 1 and FIG. 2, the presence / absence of emergency communication of the terminal is input from the information input unit 7 by the maintenance person, and after being received by the setting receiving unit 6, is set in the database 5 in advance.

As shown in FIG. 2, the information on the band (emergency band) which the emergency terminal forcibly uses when making an emergency connection is input from the information input unit 7 by the maintenance person and the setting is accepted. After being received by the unit 6, it is set in the database 5 in advance.

A connection request from the terminal 1 is received by a connection request receiving unit 2
To receive.

In the connection request receiving unit 2, this connection request is
The information is passed to the band allocation unit 3 together with the terminal identification information. The band allocating unit 3 determines whether or not there is a usable band in the database 5 that can be used by the requesting terminal.

If there is a usable band among the bands usable by each terminal, a necessary band is secured from the band and the band use status data is updated during use.
Request connection to If there is no available bandwidth, the terminal connection class of the terminal is obtained from the database 5, and the following operations (1) and (2) are performed according to the terminal connection class.

(1) When the terminal connection class is a non-emergency terminal,
The connection is disabled and the connection request receiving unit 2 is notified of the connection failure.

(2) When the terminal connection class is an emergency terminal, emergency use band information is obtained from the database 5. The connection control unit 4 is requested to disconnect the connection with the terminal using the emergency use band and to perform connection processing with the emergency terminal. The connection control 4 performs the required disconnection processing and connection processing.

For example, as shown in FIG. 2, when a connection request for an emergency terminal is made, only when the band is busy, the terminal using the emergency use band (general terminal c in FIG. 2) is disconnected. Connect an emergency terminal.

Thus, communication of the emergency terminal becomes possible. Communication of the terminal using the emergency use band is disconnected.

As described above, the time-division multiplexing apparatus 10 according to the present embodiment includes the connection request receiving unit 2, the band allocating unit 3 for allocating the requesting terminal to the usable band, and the disconnection of the connection with the using terminal. A connection control unit 4 for performing connection processing with an emergency terminal; a database 5 for managing the presence / absence of emergency communication of the terminal, band information used in an emergency, and band use status as data; terminal connection class / band used in an emergency Setting accepting unit 6 for accepting information setting, information input unit 7 for inputting information on terminal connection class / bandwidth information used in an emergency
And assigns a class corresponding to the degree of urgency of the connection of the terminal to the accommodated terminal, and forcibly sets the band to be used when all the bands are in use at the time of the connection request of the emergency connection terminal. Therefore, the terminal connected to the time-division multiplexing apparatus 10 can be operated with a smaller capacity of the trunk line than the total capacity of the bandwidth required. Further, when an emergency communication occurs, the connection is disabled. It can be operated without becoming.

Therefore, if the time-division multiplexing apparatus having such excellent features is applied to a subscriber line digital private line system, an emergency connection can be surely secured in a demand assigning function, and furthermore, an effective use of a trunk line is achieved. Can be.

The case where the time-division multiplexing apparatus according to the present embodiment is applied to the above-described time-division multiplexing apparatus has been described as an example. However, the present invention is not limited to this. Any multiplexing device to which a plurality of terminals can be connected is applicable to all multiplexing devices.

The band allocating unit, the connection control unit, the database and the like constituting the time division multiplexing apparatus may have any structure, and furthermore, the terminal connection class registration method, the band information setting area, etc. It is needless to say that may be in any form.

[0031]

According to the multiplexing apparatus of the present invention, a class corresponding to the degree of urgency of connection of a terminal is assigned to a terminal accommodated therein, and all bands are in use at the time of a request for connection of an emergency connection terminal. The system is equipped with an emergency connection means for setting the band to be used forcibly, so that it can be operated with a small capacity of the trunk line, and can be operated without being disabled when an emergency communication occurs. Can be.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a multiplexing apparatus according to an embodiment to which the present invention is applied.

FIG. 2 is a diagram for explaining a function of the multiplexing device.

[Explanation of symbols]

1 terminal device, 2 connection request receiving unit, 3 band allocating unit,
4 connection control unit, 5 database (storage means), 6 setting receiving unit, 7 information input unit, 10 time-division multiplexing device (multiplexing device)

Claims (3)

[Claims] A multiplexing apparatus to which a plurality of terminals can be connected using a predetermined band, wherein a class corresponding to the urgency of the connection of the terminal is assigned to the accommodated terminal, and the connection of the emergency connection terminal is performed. A multiplexing device comprising an emergency connection means for forcibly setting a band to be used when all bands are in use at the time of a request. 2. The emergency connection means, comprising: an input means for inputting information of a terminal connection class / bandwidth information used in an emergency; and data on presence / absence of emergency communication of a terminal, bandwidth information used in an emergency, band usage status, and the like. A storage means for storing as, and assigning the connected terminal to an available band based on the output of the storage means, and when the terminal connection class is an emergency terminal, the terminal using the emergency use band 2. The multiplexing apparatus according to claim 1, further comprising control means for disconnecting the connection and connecting to the emergency terminal. 3. The multiplexing device according to claim 1, wherein said multiplexing device is a time-division multiplexing device for transmitting a digital signal by time-division multiplexing.