JPS63204955A - Remote station congestion controller - Google Patents

Abstract

PURPOSE:To prevent general calling from pressuring the transmission of a synchronizing answer signal from a general subscriber signal and a remote station to a local exchange by separating transactions for transmitting call signals from those for transmitting general signals, and monitoring the idle number of the transactions for transmitting the general signals. CONSTITUTION:The transactions for transmitting call signals T are separated from the transactions for transmitting general signals 11. An idle number moni tor device of transactions for transmitting general signals 12 is provided, and it usually monitors the idle number of the transactions for transmitting general signals 11. If the idle number becomes below a previously decided specified value, the transactions for transmitting call signals 7 is blocked, and new calling is restricted. Thus, the progress of congestion can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a remote station congestion control device for controlling the congestion of control signals between a local exchange and a remote station.

[Prior Art] In a system in which a local exchange accommodating subscribers and a remote station are connected by telephone lines and control signal lines, it is necessary to control the congestion of control signals.

Conventional remote station congestion control devices assume that a congestion condition has occurred when all transactions for sending control signals from the local exchange to the remote station are in use, and notify the remote station of the congestion condition.

[Problems to be Solved] The above-mentioned conventional remote station congestion control device uses a large amount of signal sending transactions at the remote station when calls are made simultaneously from the subscribers of the remote station. The synchronization response signal to the local exchange was clogged, and the received signal from the local exchange was no longer clear. Eventually, the local exchange became unable to send signals to remote stations, and at this stage a congestion situation was detected. For this reason, there was a problem in that the congestion progressed considerably and it took a considerable amount of time to release the congestion state.

The present invention has been made in view of the above-mentioned problems, and aims to provide a remote station congestion control device that can prevent the occurrence of congestion in control signals between a local exchange and a remote station, and prevent the progression of congestion. shall be.

[Means for Solving Problems] In order to achieve the above object, the remote station congestion control device of the present invention is a remote station congestion control device in which a remote station accommodating a subscriber and a local exchange are connected by a control signal line. The remote station performs a calling signal transmission transaction for transmitting a calling signal, a general signal transmission transaction for transmitting a general control signal other than the calling signal, and a general signal for monitoring the number of characters in this general signal transmission transaction. This configuration also includes means for monitoring the number of characters in a transaction for transmission.

With this configuration, the remote station congestion control device of the present invention separates the calling signal transmission transaction from the general signal transmission transaction, monitors the number of characters in the general signal transmission transaction, and performs congestion when the number of characters falls below a specified value. It has a function to regard it as a status and block the call signal transmission transaction. For this reason, even when simultaneous calls occur, which is one of the causes of congestion, communication of the general control signal from the remote station to the local exchange is ensured, and the progress of congestion of the membrane control signal is prevented. It can be prevented.

[Example] Hereinafter, the present invention will be explained in detail based on the drawings.

FIG. 1 is a layout diagram of communication transactions of a remote station congestion control device according to an embodiment of the present invention.

In the figure, reference numeral 1 is a remote station subscriber, who sends a calling signal to the remote station 2. The remote station 2 is connected to a local exchange 6 by upper and lower control signal lines 3 and 4 and a telephone line 5. 7 is a transaction for transmitting a calling signal, and when the remote station 2 receives a calling signal from the remote station subscriber l, it uses this transaction 7 for transmitting a calling signal,
A control signal is sent to the local exchange 6 through the control signal line 3.

8 is a transaction for signal reception, and local exchange 6
receives a control signal from the remote station 2 using this signal reception transaction 8.

Further, 9 is a signal transmission transaction, and the local exchange 6 thereafter transmits a control signal to the remote subscriber 1 by
Using this signal transmission transaction 9, it is sent to the remote station 2 through the control signal line 4.

10 is a signal reception transaction, and the remote station 2 receives a control signal from the local exchange 6 using this signal reception transaction IO. The remote station 2 that has received the control signal from the local exchange 6 controls the remote subscriber 1 according to the control signal, and sends the control result back to the local exchange 6 using the general signal transmission transaction 11. .

This general signal transmission transaction 11 is used thereafter also when transmitting general signals other than the calling signal from the remote subscriber 1 to the local exchange 6.

Further, at the remote station 2, the number of characters in the general signal transmission transaction 11 is continuously monitored by the general signal transmission transaction character number monitoring device 12.

In the above configuration, if a large number of calls are made from the remote subscriber 1 in a short period of time, a large number of call signal transmission transactions 7 will be used. However, if the number of call signal transmission transactions 7 is limited according to the number of remote station subscribers and the transmission capacity of the control signal lines 3 and 4, calls exceeding a certain level cannot be supplemented and are regulated. be done. Therefore, it is possible to prevent the control signal lines 3 and 4 from becoming congested due to calling signals, and to avoid adverse effects on the transmission of general signals.

In addition, transaction character count monitoring device 1 for general signal transmission
2, and the number of characters in the transaction 11 for general signal transmission is constantly monitored. If the number of characters falls below a predetermined value, the call signal transmission transaction 7 is blocked and new calls are restricted.
Progression of congestion can be prevented.

It should be noted that the present invention is not limited to the above embodiments, but includes various modifications within the scope of the gist. For example, in the above embodiment, the transaction for signal transmission on the remote station side is divided into the first call signal and the general signal, but there is also a configuration in which separate transactions are provided for signals that cause congestion. It may be. Further, the classification may be other than the initial call signal and general signal.

[Effects of the Invention] As explained above, the present invention separates the calling signal transmission transaction from the general signal transmission transaction at the remote station, and further monitors the number of characters in the general signal transmission transaction, thereby achieving Even for simultaneous calls, there is an effect that the transmission of general subscriber signals (response disconnection signals) and synchronous response signals from remote stations to local exchanges is not overwhelmed.

Furthermore, if these general signals begin to become congested, it is possible to restrict calls and prevent the congestion from progressing.

[Brief explanation of the drawing]

FIG. 1 shows a remote station congestion control vi according to an embodiment of the present invention.
FIG. 3 is a layout diagram of communication transactions of the J device. 1: Remote station subscriber 2: Remote station 3.42 Control signal line 6: Local exchange 72 Transaction for transmitting call signals 11 D Transaction for transmitting general signals 12 D Transaction for transmitting general signals Availability monitoring device

Claims (1)

[Claims] In a remote station congestion control device in which a remote station accommodating remote station subscribers and a local exchange are connected by a control signal line, the remote station transmits a calling signal transmission transaction for transmitting a calling signal, and a calling signal transmission transaction. A remote station congestion control device comprising: a general signal transmission transaction for transmitting a general control signal other than the general control signal; and a general signal transmission transaction vacancy monitoring means for monitoring the vacancy number of the general signal transmission transaction. .