JPH0199345A - Fault display system for communication network management chart - Google Patents

Abstract

PURPOSE:To display communication enable sections actually and disable sections distinguishingly without difference in a fact by applying discrimination such that communication disable display is applied to the remaining one transmission line when communication disable display is applied as to (N-1) lines among N-set of transmission lines connected to one branch point. CONSTITUTION:The algebraic sum of communication quantity supplying to/ received from each branch at each node of a communication network is zero except the node start point and the end node point, and discrimination is applied with an item added newly that the remaining one transmission line is subject to communication disable display when (N-1) lines are displayed of communication disable among N-set of transmission lines connected to one branch point. Thus, a defect that a fault of the transmission line is not displayed properly depending on the arrangement of line terminators and a fault state is eliminated and a fault is displayed properly.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a configuration system for a communication network management device, and more particularly to an improvement in a display system for a communication network management diagram.

(Prior Art) Conventionally, failures have been displayed by changing the color of a section on a communication network management chart, for example from white to red, in response to a transmission line in which a failure has been recognized.

FIG. 2 is an explanatory diagram showing the configuration and failure status of a communication network according to the prior art. In Figure 2, (a)
shows the configuration of the network, and (b) shows a graph display when a transmission path failure occurs.

In FIG. 2(a), 11 and 12 are line termination devices, respectively, and 2 is a transmission line.

In FIG. 2, when a fault is recognized in the transmission line 2, the display color of the transmission line 2, indicated by a broken line, changes from white to red, for example.

FIG. 8 is an explanatory diagram showing the configuration and failure situation of another communication network according to the prior art. In Figure 8, (a
) shows the network configuration, (b) shows the fault display in the first fault situation, and (C) shows the fault display in the second fault situation.

In FIG. 8, 11 to 14 are line termination devices, respectively;
21 to 2S are transmission lines, and 31 and 32 are branch points.

In the failure display method of the communication network management diagram for the transmission lines 21 to 25 including the branch points 31.32, in the first failure situation, the transmission lines 21 to 25 including the branch points 31.32
is considered to be one line, all of them are displayed as being unable to communicate, and in the second failure situation, the transmission lines 21 to 2S from each line termination device 11 to 14 to the first branch point 31.32 are displayed as being unable to communicate. indicate.

However, in the failure situation of @1, line termination device 11.
Even if a fault in the transmission line 21.24 is recognized in step 14, it does not necessarily mean that communication is impossible between the line 1 line termination devices 12.13, and a discrepancy occurs between the fact and the display. In addition, in the second fault situation, even if the three stations 111 and 12.13 recognize a fault in the transmission path 21, 22, 23, in reality, the communication from the line terminating device 14 In some cases, this is not possible. In such a case, the communication is not possible on the transmission paths 24 and 28 and is not displayed, resulting in a discrepancy between the actual fact and the display.

(Problems to be Solved by the Invention) The fault display method of the conventional communication network management chart described above has the drawback that a fault in a transmission line may not be displayed accurately depending on the arrangement of line termination equipment and the fault situation. There is.

The purpose of the present invention is to take advantage of the relationship that the algebraic sum of the traffic flowing in and out from each school to each node of the communication network is 0 except for the start node and the end node, and to The above-mentioned drawbacks are eliminated by making a judgment by adding the item that when N-1 of the N transmission lines is displayed as being unable to communicate, the remaining one is also displayed as being unable to communicate,
An object of the present invention is to provide a failure display method for a communication network management chart configured to display failures accurately.

(Means for Solving the Problems) Does the failure display method of the communication network management chart according to the present invention include the transmission line network, the line termination device, and the display means? It is constructed with the following features.

A transmission line network is made up of a plurality of transmission lines that have a plurality of branch points and are configured so that they can be concentrated.

The line termination equipment recognizes failures on the transmission path and
It is connected to the terminal of the transmission line so that information regarding failures can be transmitted.

The display means determines and displays the state of communication enable/disable in the transmission path between the branch points and between the branch point and the line terminator, based on the information regarding the failure transmitted from the line terminator. It is something.

(Example) Next, the present invention will be explained with reference to the drawings.

Figure @1 is an explanatory diagram showing the configuration and failure situation of a communication network according to the present invention. Figure 1, 11-14
are line termination devices, 21 to 25 are transmission lines, and 31 and 32 are branch points. In FIG. 1, (a) is normal, and (b) is the line terminal device 11.
(C) is when the line termination device 11.12 recognizes a failure in the transmission path 21, 22.25, and (d) is when the line termination device 11.14 recognizes a failure in the transmission path 21. .24 failures are recognized.

Next, the display will be explained for each case.

Figure 1 (1) is operating normally, the layer is cloudy, and no abnormality display appears.

In FIG. 1(b), the line termination device 11 recognizes a failure in the transmission line 21 and displays that the transmission line 21 is incapable of communication.

FIG. 1(e) shows that a fault in the transmission lines 21, 22.25 is recognized in the line termination device 11.12, and
A message indicating that communication is not possible is displayed. Since two of the eight transmission lines 21, 22, and 28 connected to the branch point 31, that is, 21° 22, are unable to communicate, the remaining one transmission line 25 is also unable to communicate. is displayed.

Therefore, it is displayed without any doubt that communication is not possible except between the line termination devices 13 and 14.

In FIG. 1(d), the fault in the transmission line 21.24 is recognized in the line termination device 11.14, so
．． 24 is uncommunicable. Therefore, as shown in FIG. 1(d), it is displayed as is true that communication is not possible with anything other than the line termination devices 12 and 13.

(Effects of the Invention) As explained above, the present invention makes use of the relationship that the algebraic sum of the traffic flowing in and out from each school to each node of the communication network is O except for the starting node and the ending point. Also, an item has been added that when N-1 of the eight transmission lines connected to one branch point is displayed as unable to communicate, the remaining one will also be displayed as unavailable. Depending on the judgment, which sections are actually communicable and which are not? This has the effect of being able to distinguish and display facts without any difference.

[Brief explanation of the drawing]

FIGS. 1(a) to 1(d) are explanatory diagrams showing the configuration and failure status of a communication network according to the present invention. FIGS. 2(a) and 2(b) and FIGS. 3(a) to 3(C) are explanatory diagrams showing the configuration and failure status of a communication network according to the prior art, respectively. 11-14...Line termination device 21-25...Fist transmission line 31.32--Branch point

Claims (1)

[Claims] A transmission line network consisting of a plurality of transmission lines configured to have a plurality of branch points so that they can be concentrated; A line termination device connected to a terminal of the transmission path and the transmission path between the branch points and between the branch point and the line termination device based on information regarding the fault transmitted from the line termination device. 1. A failure display method for a communication network management chart, comprising display means for determining and displaying communication enabled/disabled status in a communication network management chart.