JPH03153140A - Fault discrimination system by pattern bit map - Google Patents

Abstract

PURPOSE:To surely discriminate a fault in a short time by collating lots of alarms generated based on one fault depending on a bit map table. CONSTITUTION:When a fault takes place at a location between sections F and C, alarm is raised in terminal equipments (a), (b), (e) respectively. The alarm information is collected by an alarm information collection section 2 of a network monitoring section and arranged and latched in the same order as in a bit map table by a collected data holding section 5. A discrimination section 4 is operated through the generation of the alarm information to control a readout control section 6, thereby reading sequentially each item of the bit map table 1 from No.0 to No.15. The readout control section 6 reads and collates the bit map table 1 and the fault section object is immediately outputted, then the maintenance personnel checks the sections of F to C and D to F to detect a fault location in a short time.

Description

[Detailed Description of the Invention] [Table of Contents] Overview Industrial Field of Application Conventional Technology (Figures 3 and 4) Means for Solving the Problems to be Solved by the Invention (Figure 1) Working Examples (Fig. 2) Effects of the invention [Summary] Regarding a communication network failure determination method using a pattern bitmap.

The purpose is to create a bitmap of the pattern of occurrence of influential faults and use it to eliminate the affecting faults from multiple status change alarms, thereby quickly determining two-main cause failures.

In a failure judgment method for detecting failure points in a communication network consisting of a plurality of transmission means and terminal means, a bitmap holding means in which alarm information based on the failure category of one communication network is written and an alarm in the terminal means are used.・Provide an alarm information collection means for collecting alarm information, and a verification means for verifying the alarm information obtained from the bitmap holding means and the alarm information collected by the alarm information collection means, and Two configurations are used to detect faulty sections.

[Industrial application field]

The present invention uses a pattern bitmap-based failure determination method (
- 1% involved; even if an alarm occurs on multiple terminal devices in a network monitoring system.

A failure determination method that makes it easy to determine where the fault that caused the alarm is located (related to -).

[Conventional technology]

Generally, in a communication network, in order to monitor the operational status of four communication facilities, alarm information of the two communication facilities is collected in a central host processor and centrally monitored. The alarm information collected in steps 1 to 1 is displayed on a CRT, printer, etc., and monitored by printing I7.

Nowadays, communication networks are so complex that when a failure occurs in a certain part.

In most cases, many alarms from other devices affected by the failure occur simultaneously.

For example, as shown in FIG. 3, transmission facilities A, B, and C.

When a communication network is configured by D, E and terminal equipment a, b, c, and d, a-AC-D-C
and b-B-(, -D-E-d, and if a failure occurs that stops the C-D section, the line (two connected a
, d alarms are generated at the same time for each terminal equipment.

By the way, when all the alarms of these terminal equipments a to d are reported to the central monitoring section, the operator must determine where the true failure point is based on each alarm.

However, in cases where large-capacity transmission equipment is stopped, etc.

It is not uncommon for more than 100 alarms to occur at the same time, so it is easy to make this determination.
There is no C.

Therefore, in the past, the connection status of two devices was maintained using knob-it, and when an alarm occurred, the connection status of pine j↓゛;i was determined by linking a large number of files, and the affected failures were extracted. was.

For example, in the communication network shown in Figure 3 above, line Write down the information in the file (==. Then, if terminal equipment a, 12 e, dt's alarm occurs,
Read out and decipher this.

Assume that an alarm occurs on terminal equipment a and C.

It is detected that a fault has occurred in sections A, -C, and CD. In addition, when reading the line y starting from the terminal equipment I- and the terminal equipment d, an alarm occurs in the sections B-C, (, -D, D-E) when two faults occur. Detect these (-2 original λ, end unequipped a, b, c, d, nift sheets, raw 1
; Failure occurred in 7'S-doki7 section C-1)12. I was able to determine which one was Asahi-C1 and which one was 7.

[The problem to be solved by the invention is L2, 5] Without a doubt, ), as shown in No. 41X1, the alarm h,
e.

When d occurs 6., first, the alarm bl: accesses the file F1 and detects its affected section.

Similarly, for alarms C and d, file F1
access and detect the affected area.

At this time, depending on the case, a large number of files are linked to extract the affected fault section. Based on these, the main cause failure section is determined.

Therefore, if the number of alarms is n, it is necessary to access the file the number of times related to this alarm, and moreover, time is also required for the determination.

Therefore, the 9 communication network became a machine ship, and the large capacity roared.
For example, if 100 or more alarms occur simultaneously, it may take a very long time, for example several tens of seconds to several minutes, to complete the judgment, and it may not be possible to grasp the line status at the time of failure. There is.

It is therefore an object of the present invention to provide a network monitoring system based on multiple status alarms.

It is an object of the present invention to provide a failure determination method that can determine the true location of a failure in an extremely short time.

[Means to solve the problem]

In order to achieve the above object, 1 the present invention provides 2 transmission facilities A, B, C, D, E and terminal facilities a, b as shown in FIG.
, c, and dl-, and in the same way as above, a-A-C-D-C and b-B-C
- When configuring lines with routes D-E-d,
A bitmap table 1 is created that describes in which terminal equipment a reception failure, that is, an alarm occurs, when a fault exists in which section.

In the centralized monitoring section, an alarm information collection section 2 is provided and configured to collect alarm information of each terminal equipment.

Here, bitmap table 1 is 2, for example transmission equipment A.
When a failure occurs on the transmission side from A to C, an alarm occurs only at terminal equipment C because this route is part of line a-A-C-D-c, so the NQo term is The data shown in is entered, and conversely C-A
When a failure occurs in , an alarm is generated only in terminal equipment a, so data as shown in Hidden 1 is entered.

Also, when a failure occurs in C and D, this section is used by two lines as mentioned above.

Since an alarm occurs in terminal equipment C and d, data as shown in the Nn2 section is entered.

Bitmap table 1 is created in advance by creating such alarm/position data for all sections of the 9 communication networks.

[Effect]

If a failure occurs in the communication network, alarm information at each terminal equipment a to d is collected by the alarm information collection unit 2. Then, they are arranged in the same order as the alarm numbers in the bitmap table 1, and the collation unit 3 sequentially collates each entry. When these patterns match, it is determined that the stop section entered in the bitmap table 1 is a fault section, and this is output from the determining section 4.

By the way, in this comparison, each item of bitmap table 1 is read out sequentially, but when this read data is inverted and an AND operation is performed, at least one bit of the mismatched item becomes "1". All matched terms are
0'', making it easy to determine 1. Of course, the checking means is not limited to this.

For example, when an alarm occurs only in terminal equipment c and d,
When the Na2 term of the bitmap table 1 is read out, it becomes all "0", so the 2 discriminator 4 outputs the data C-D of the stop section of this term, so that the terminal equipment c
, d are erased, and it is immediately determined that a failure has occurred in this C-4D portion. Therefore, by checking between CD and D, a faulty part can be detected.

〔Example〕

An embodiment of the present invention will be described based on FIG.

In FIG. 2, two communication networks are composed of transmission equipment A to A and terminal equipment A to G. It is assumed that each terminal equipment is configured to be able to communicate with each other. In other words, terminal equipment a is configured to be able to communicate with each of b and g, and terminal equipment is configured to be able to communicate with each of a and c-g. In this way, each of the other terminal equipment is also configured to communicate with each other. configured to be possible.

In FIG. 2, the same symbols as those in FIG. 1 indicate the same parts. The collation unit 3 includes an AND operation unit 3-1 that performs a bit-based AND operation, and a
It is provided with an inversion part 3-2 that inverts to lJ.

The collected data holding section 5 holds the alarm information collected by the alarm information collecting section 2, and the read control section 6 reads out the bitmap table 1 for each item in the second order and sends it to the read data holding section 7. Item 2 Read data holding unit 7
1 temporarily holds the data transmitted from the read control section 6 and outputs the held stop section data to the judgment section 4 according to an instruction from the judgment section 4.

By the way, the bitmap table 1 shown in FIG.
This is a failure determination table showing alarm information when a failure occurs in each section when the terminal equipment 3-g is configured to be able to communicate with each other.

For example, if a failure occurs in sections A- and C, the signal transmitted from terminal equipment a cannot be received by other terminal equipments g and then an alarm occurs. Conversely, if a failure occurs in section C-A, only terminal equipment a will issue an alarm.

Also, if a failure occurs in section C-F, terminal equipment a.

Transmission signals from b and e are transmitted to other terminal equipment c, d and f.

Since reception is not possible on g, an alarm is generated and if a failure occurs in two sections F and C, terminal equipment C+ d* f+ g
Since the transmitted signal from terminal equipment a, b, and e cannot be received by terminal equipment a, b, and e, an alarm is generated. In this way, alarm information when a failure occurs in each section is written in advance for all sections.

Of course, the alarm information in bitmap C table 1 differs depending on the status of the four lines.

For example, in the communication network system shown in FIG. 2, two lines are a-A-C-F-D-c, b
-B-C-F-D-E-d, e-G-C-F-D
In the case where only -Hf is formed 2, a corresponding bitmap map 1 will be created and used.

Therefore, rather than just one bitmap C table, each bitmap C table is prepared according to the line route status planned in advance.
It is appropriate to use tables selectively.

Next, the operation shown in FIG. 2 will be explained.

If a failure occurs in section F-C, terminal equipment a and b
, e, respectively. These alarm information are collected by the alarm information collection unit 2 in the network monitoring unit, and stored in the collected data storage unit 5 in the same order as the bitmag team.'1''IJ , 11 In the garter holding unit 5, the alarm information is a, 1), (1.

II of d, e, f, g, l'-11O0100j and 1,
7C is retained.

In response to the occurrence of alarm information, the 2-discriminating section 4 operates and sends each entry of the bitmap table 1 to the read control section 6 by N1.
Control is performed so as not to read out sequentially from NtL10 to NtL15.

As a result, the data of the term ko is read out, and this is temporarily held in the read data holding section 7. Then, the alarm information is sent to the collected data holding section 5 in the collation section 3.
It is checked to see if it matches what is held in . However, in this case, the alarm information of N11O does not match rl, 100100j held in the collected data holding section 5, so the matching section 3 outputs a mismatch signal to the discriminating section 4. Based on this, the determination unit 4 instructs the readout control unit 6 to read out the data in the Nal section of the bitmap table 1. The data of φ table 1 is IIEj
The next output is 3°t 1. -1. Nu 7's f/night is held in the read data holding unit 7)?・ζ. The AND operation section 3-1 of the matching section 3 outputs a match signal "O". At this time, the read data holding unit ゛i sends the stop interval information @rF=cj of the term of the floor 7 that it holds to the discriminating unit 4, so this [F=Cj is the interval failure information is output as The read control unit 6 further reads the bitmap
Table 1 is read and collated, but in this case D-
Also in the part F, the AND operation unit 3-] outputs all rOJ, which is also output as section failure information. In this way, the failure information of the terminal equipment is erased and the failure section candidate is immediately output, so maintenance personnel can detect the failure location in a short time by checking the FC and DF sections.

Naturally, in the case of C- and A, the terminal equipment a connected to A is also subject to failure.

Note that the bitmap table] can be automatically generated based on equipment and line data.

Can easily accommodate network changes.

Furthermore, in the above embodiment, an example in which matching is performed using the reversing unit 3-2 has been described, but of course the invention is not limited to this, and it is also possible to simply perform pattern matching to detect whether or not there is a match.

1...Bitmap table 2...Alarm information collection section.

3... Collation section.

4...Discrimination section.

A, B, C, D, E...Transmission equipment.

a, b, c, d...terminal equipment.

〔Effect of the invention〕

According to the present invention, failure determination can be made in a short time by comparing a large number of alarms generated due to one failure based on a bitmap table.

Since it can be performed reliably, failure recovery in complex communication networks can be performed quickly.

This will improve the reliability of communication networks.

Claims (1)

[Claims] In a failure determination method for detecting a failure location in a communication network composed of a plurality of transmission means and terminal means, a bitmap holding means (one ), and an alarm information collection means (
2), and a collation means (3) for collating the alarm information obtained from the bitmap holding means (1) and the alarm information collected by the three-alarm information collection means (2), and the collation means (3)
A fault determination method using a pattern bitmap, characterized in that a fault section is detected based on a matching result in a pattern bitmap.