JPS5823027B2 - Normality confirmation method for traffic control system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a normality confirmation method for a so-called traffic control system for realizing traffic control against abnormal congestion in an automatic telephone exchange.

FIG. 1 shows an overview of a traffic control system according to the present invention.

In the figure, CEF is the center, DET is the congestion detection device, and RCIE is the regulation device.
is installed at each exchange, whereas CEF is installed at a higher-level exchange to centrally manage the exchanges under its umbrella.

Traffic control for abnormal congestion will be explained with reference to FIG.

At each exchange, the congestion state of the exchange is detected by the congestion detection device DET, and when the congestion condition exceeds a certain predetermined congestion threshold, the DET of the corresponding exchange is sent to the center CE.
Abnormal congestion information is sent to F via route A.

When the CEF receives abnormal congestion information from an affiliated exchange where abnormal congestion has occurred, it edits and judges the information.

Then, the restriction information based on the result is sent to the restriction devices RCIE of all the affiliated exchanges through the route.

Upon receiving this restriction information, the RCIE restricts outgoing calls based on the information in accordance with a certain format,
Traffic is thereby controlled.

However, a series of operations to control traffic in response to such abnormal congestion generally rarely occur.
The availability of this system is extremely low.

Therefore, if each device or information transmission path becomes an obstacle when the system is put into operation, normal operation cannot be expected, and this traffic control system has the drawback of being useless.

The purpose of the present invention is to prevent such failures from becoming latent, and to provide a method for confirming the normality of a traffic control system that can economically and automatically confirm the normality. .

First, the present invention will be explained in detail with reference to FIG.

In the figure, test information is automatically sent from the center CEF to the regulation device RCIE of the affiliated exchange at regular intervals through the same route entrance as the regulation information.

When the RCIE receives this information, it determines whether it is regulation information or test information, and if it is identified as test information, it activates the congestion detection device DET along the route C.

When activated from the RCIE, the DET transfers the test information to the CEF along the same path as the abnormal congestion information according to a predetermined format.

Then, by determining the timing during this time and the transferred information in the CEF, it is confirmed whether or not this system is normal.

Next, the present invention will be explained in more detail using FIG. 2 showing a specific example of the present invention.

In FIG. 2, when the regulating device RCIE is activated from the center CEF in the path shown in FIG. 1, relay A is activated, and subsequently, relay B (not shown) is activated.

MF receiver MFREC is set to MP by contact b0 of relay B.
After the preparation for signal reception is completed, when an MF multiplied signal arrives from CEF, it is received by MFREC and relays OK are operated.

Now, if we set the test signal when the first digit is 1'', the relay TST will switch between contacts b1° aso and 0° based on this information.
, 1°.

Although the contact as0 is not shown, it is a contact of the first numeric identification relay As.

In this way, the MF multiplied signal from the CEF is received and identified, and if the first number is ``d'', it is determined to be test information, and otherwise, it is determined to be regulatory information.

As a result, when the relay TST operates, its contacts ts
At t0, the detection device DET is started on the path C in FIG.

In the detection device DET, the control unit C0N is activated by the activation signal.
When T identifies that the activation is from the regulating device RCIE, the relay ST in the sending section is operated according to the format to be sent to the center CEF as a test signal, and its contact st0 is used to send the signal to the CEF along the route A in Figure 1. A start signal (loop signal) is sent to the target.

On the other hand, the relays 0-K for numerical information operate according to the format determined by the control unit C0NT, and the relay P for generating pulses also operates.

As a result, the output of the MF oscillator MFO8C is
CE through the desired two contacts in 0 and contact p0 to ~
The MF multiplied signal is sent to F.

Thereafter, the CEF receives the MP double signal sent from the DET, identifies it, and determines whether it is the desired information.

As a result, if a fault is detected in the system of the exchange that has been tested, that information will be reported to maintenance personnel and the like.

In this way, the center CEF automatically confirms the normality of the traffic control system for each switching office one after another.

As described in detail above, according to the present invention, by providing a test information transfer lead between the regulating device and the congestion detecting device, system normality can be easily maintained by simply adding a small amount of hardware. It is possible to confirm the following.

Additionally, this makes it possible to prevent potential failures and realize an extremely reliable traffic control system.

[Brief explanation of drawings]

FIG. 1 is a diagram showing an outline of a traffic control system according to the present invention, and FIG. 2 is a diagram showing an embodiment of the present invention. CEF...Center, RCIE...Regulation device, DET...Congestion detection device, I99B, C...Information transmission path, MFREC...・
MF receiver, MFOS C...MF transmitter, C
0NT...--Control unit, A, TST. ST, P, 0~K...Relay.

Claims (1)

[Claims] 1 Congestion detection equipment installed at each exchange detects the congestion status of the exchange, transfers the information to the center, and sends regulation information to the regulation devices in each exchange under the control of the center, thereby reducing traffic. In a traffic control system that controls traffic, test information is sent from the center to a regulating device in a given exchange through the same route as the above-mentioned regulation information, and when the regulating device identifies it as test information, it Traffic characterized by activating a congestion detection device, then transferring desired information from the congestion detection device to a center, and confirming normality by determining the transferred information at the center. Control system normality confirmation method.