JPH03229533A - Method and system for informing high speed line fault - Google Patents

Abstract

PURPOSE:To permit all multiplex devices constituting a network to recognize the fault by allocating a high speed line fault table on a high speed line, setting a bit on the table corresponding to the line detecting the fault to be the fault and transferring it to the other high speed line. CONSTITUTION:Circuits 21-2M are separation circuits and they separate data of 192 bits into communication data and the high speed line fault table. The high speed line fault table is arranged in a fixed time slot position on the high speed line. The fault table frame synchronization of the high speed line fault table separated in the separation circuits 21-2M is detected in frame synchronous circuits 31-3M. Since a signal showing the fault is inputted from frame synchronous circuits 11-1M when there is the fault in the high speed line, the specified bit on the fault table corresponding to the high speed line concerned is set in the fault. A multiplex circuit 9 adds a fault table frame generated in a generation circuit 8 to the table and it is transmitted to multiplex circuits 71-7N.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a high-speed line failure notification method and a high-speed line failure notification system using a multiplexing device related to data transmission.

[Conventional technology]

In a network in which a plurality of multiplexers are connected to each other by a plurality of high-speed lines, there is no effective means for transmitting abnormalities in the high-speed lines to the respective multiplexers. When an abnormality occurs on the high-speed line, the network monitoring device that monitors the network uses the communication area between the network monitoring device and the multiplexing device that is pre-assigned to a part of the high-speed line to connect the connected high-speed line. Collect line fault information. This makes it possible to detect abnormalities in the high-speed line.

[Problems to be Solved by the Invention] As mentioned above, high-speed line abnormality detection information is notified only to the network monitoring device, but the multiplexing device that makes up the network cannot recognize all abnormalities in the high-speed line. There are drawbacks.

SUMMARY OF THE INVENTION An object of the present invention is to eliminate such drawbacks and provide a long-distance line failure notification method and high-speed line failure notification system that can notify one detection of a high-speed line failure.

[Means to solve the problem]

The present invention includes a plurality of multiplexing devices that transmit and receive data;
A network equipped with high-speed lines connecting these multiplexing devices.
This is a high-speed line fault notification method for notifying each multiplexing device of a high-speed line fault that has occurred within a network, in which a fault table representing each high-speed line fault is assigned to a high-speed line, and when a high-speed line fault is detected. , is characterized in that bits in the fault table corresponding to this high-speed line are set as faults and transferred.

Furthermore, the present invention notifies each multiplexer of a high-speed line failure that occurs in a workpiece that is equipped with a plurality of multiplexers that transmit and receive data and a high-speed line that connects these multiplexers. A high-speed line failure notification system l, wherein each multiplexing device, upon detecting a failure in a high-speed line, sets a via (via) in the failure table corresponding to the high-speed line as a failure and transmits the information. It is characterized by having

Furthermore, in the present invention described above, each multiplexing device is provided corresponding to each high-speed line, and when a failure of the high-speed line is detected, a detection unit that sets the bit of the failure table corresponding to this high-speed line as a failure. and a creation unit that creates a new failure table indicating a failure in the high-speed line based on the failure tables from each of the detection units, and a transmission unit that sends out the failure table created by the creation unit to the high-speed line. suitable.

[Example] Next, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a diagram showing an example of a high-speed line fault notification system according to the present invention. A plurality of multiplexing devices 11 to 17 are used in this high-speed line failure notification system. First, these multiplexing devices will be explained.

FIG. 2 is a block diagram showing an example of a multiplexing device.

This multiplexer is a high-speed line frame synchronization circuit (hereinafter referred to as
(hereinafter referred to as a frame synchronization circuit) ①, ~1B, and a data/alarm frame separation circuit (hereinafter referred to as a separation circuit) 2. ~
2. and a high-speed line failure table frame synchronization circuit (hereinafter referred to as frame synchronization circuit)3. ~3. , a high-speed line failure table storage circuit (hereinafter referred to as a storage circuit) 4, a crosscoder) 5, and a high-speed line frame generation circuit (hereinafter referred to as a storage circuit).
(referred to as generation circuit) 6. ~6N and data frame high-speed line failure table multiplex circuit (hereinafter referred to as multiplex circuit) 7
I~78 and high-speed line failure table frame generation circuit (
(hereinafter referred to as a generation circuit) 8 and a multiplex circuit 9.

Such a multiplexer has input terminals 111 to IIM and output terminals 12 . ] and 2N are connected to high-speed lines. Further, in each high-speed line, as shown in FIG. 3, a frame is assumed in which 192-bit data and a 1-bit frame are repeated every 125 μsec.

In each multiplexer, signals from the respective high-speed lines are input to input terminals 11□ to 11. sent to.

Signals input from input terminals 111 to 11M are sent to frame synchronization circuits 1. Synchronization is detected at ~1o. When the frame synchronization circuits II to IM correctly detect the synchronization frame, they determine that the input high-speed line is normal and notify the detected frame position to the separation circuits 2, to 2o.

Circuits 2, ~21. I is a separation circuit that separates the 192-bit pig shown in FIG. 3 into communication data and a high-speed line fault table. A high-speed line failure table is placed at a fixed time slot position on the high-speed line. An example of this arrangement is shown in FIG. Separation circuit 2. The communication data separated by ~2M is input to the cross-connect 5 and switched to the respective outgoing lines in order to select and IR the outgoing lines.

The high-speed line failure table separated by the separation circuits 21-2a undergoes failure table frame synchronization detection in frame synchronization circuits 31-3.4. When high-speed line is a problem,
Since a signal indicating a failure is input from the frame synchronization circuit 1 to IM, a specific bit on the failure table corresponding to the high-speed line is set as failure. Also,
Even when the separation circuits 3 to 3.4 detect out-of-synchronization, they set the corresponding bit of the corresponding high-speed line as a failure. If synchronization is detected normally, the contents of the table are returned to normal. Each frame synchronization circuit 3 corresponding to each high-speed line
．． The outputs of 3-1 are input to the storage circuit 4. The storage circuit 4 creates the latest table according to the manually created table. Further, the table is created by the multiplex circuit 9 after adding the fault table frame generated by the generation circuit 8 to the table. ~ Sent to 7H. Multiplex circuits 71-7
□ represents the communication data output from the cross-connect 5 and the generation circuit 6. The high-speed line frame outputs of 6 and 4 are multiplexed to create transmission data on the high-speed line, and the output terminals 12 and 4 of the respective high-speed lines are multiplexed. ~12N.

In addition, in Fig. 3, the alarm table is configured with 12 multi-frames, and it is shown that failures on 12×n lines can be notified by the number n of bits allocated to the high-speed line. It can be increased or decreased by changing the number. Furthermore, the number of multi-frames can be determined by the number of protection stages of the frame synchronization circuit.

Such a multiplexing device is used in the high-speed line failure notification system shown in FIG. Note that this high-speed line fault notification system is applied to networks.

This high-speed line failure notification system is comprised of multiplexing devices 11-I7 similar to the multiplexing devices described above, and high-speed lines 21-31 connecting these multiplexing devices 11-17.

In such a high-speed line failure notification system, for example, if the high-speed line 23 is defective, the multiplexers 11 and 15 are first
However, using the obstacle chifur shown in Figure 3,
It works like this: That is, multiplexer IL 15
At , the bit in the fault table corresponding to line 23 is set to fault. Subsequently, the multiplexer 11
This fault table is transmitted via high-speed lines 21, 22, 24 to multiplexers 12, 16, 13, respectively. The multiplexer 15 also transmits this failure table to the multiplexer 14.1 via the high-speed line 28.29.
7.

Therefore, it becomes possible for all multiplexing devices in the network to recognize a failure in the high-speed line 23.

In this way, in a network where a plurality of multiplexing devices are each connected to each other by a plurality of high-speed lines, this embodiment can create a table indicating high-speed line failures in a multi-frame configuration in an area on the high-speed line. allocation,
A multiplexer that detects a high-speed line failure sets the corresponding position on the table as a failure, and transmits the created table to another multiplexer.

〔Effect of the invention〕

As explained above, the present invention allocates a high-speed line failure table on a high-speed line, sets the bit on the table corresponding to the line in which a failure has been detected as a failure, and transfers this to another high-speed line. This has the effect that all the multiplexing devices that make up the network can recognize failures in high-speed lines.

[Brief explanation of drawings]

1 is a diagram showing an example of a high-speed line failure notification system according to the present invention; FIG. 2 is a block diagram showing an example of a multiplexing device used in the high-speed line failure notification system of FIG. 1; FIG. 3 is a diagram showing a format of a high-speed line failure table according to the present invention and an example of arrangement on a high-speed line. 11-17... Multiplexing device 21-31... High-speed line

Claims (3)

[Claims] (1) A high-speed line failure notification method that notifies each multiplexer of a high-speed line failure that occurs in a network that includes multiple multiplexers that transmit and receive data and high-speed lines that connect these multiplexers. The system is characterized in that a fault table representing faults in each high-speed line is assigned to the high-speed line, and when a fault in a high-speed line is detected, the bits in the fault table corresponding to this high-speed line are set as faulty and transferred. High-speed line failure notification method. (2) A high-speed line failure notification system that notifies each multiplexer of a high-speed line failure that occurs in a network that includes multiple multiplexers that transmit and receive data and high-speed lines that connect these multiplexers. A high-speed line fault notification system, characterized in that each multiplexing device has means for, upon detecting a fault in the high-speed line, setting bits in a fault table corresponding to the high-speed line as faulty and transmitting the data. . (3) Each multiplexing device is provided corresponding to each high-speed line, and when a failure in the high-speed line is detected, it sets a bit in the failure table corresponding to this high-speed line as a failure, and each of the above-mentioned detection units 3. The high-speed line according to claim 2, further comprising: a creation unit that creates a new failure table indicating failures in the high-speed line based on the failure table from the unit; and a transmission unit that sends out the failure table created by the creation unit to the high-speed line. Fault notification system.