JPH06125322A - Self-monitor control system in sdh communication equipment - Google Patents

Abstract

PURPOSE:To reduce the switching time on a fault of a package having redundant configuration in the self-monitor control system in the SDH communication equipment having a redundant system equipment. CONSTITUTION:A path pattern insertion circuit (IN) in a main signal distribution package 1 inserts a path pattern into A1 and A2 bytes of an SDH transmission frame of a main signal S1. A pattern is checked by allowing a path pattern termination circuit (TE) 22 to terminate only the A1 byte in #1-#n packages 11-13 and a path pattern is newly inserted to the A1 byte in the IN 23. The TE 24 of a main signal selector package 2 being a final package in the changeover unit terminates not only the A1 byte but also the A2 byte, then the equipment implements high speed changeover without leakage in the unit of changeover. Thus, the changeover time of the package on the occurrence of a fault is reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an in-device self-monitoring control system for an SDH (Synchronous Digital Hierarchy) communication device, and more particularly to an in-device self-monitoring control system for a communication device having a redundant configuration.

[0002]

2. Description of the Related Art A conventional SDH communication device of this type (CCI
In a device that processes an SDH transmission frame defined by TT), in-device monitoring is performed by path pattern monitoring and level monitoring, and the monitoring result is used for failure evaluation and switching of redundant configuration.

Hereinafter, a conventional example will be described with reference to the block diagram of the SDH communication device focusing on the in-device monitoring means of FIG. 3 and the SDH transmission frame signal configuration diagram of FIG.

In FIG. 4, an SDH transmission frame 40
One frame is a sync frame 44 and a data part 43.
Includes and. The synchronization frame 44 is composed of an A1 byte 41 and an A2 byte 42, and a path pattern is inserted in the A1 byte 41 and the A2 byte 42.

In FIG. 3, the main signal distribution package 1a
Receives the main signal S1 composed of a plurality of SDH transmission frames 40 from the transmission line, and outputs the path pattern insertion circuit (I
N) 21a inserts a path pattern into the A1 byte 41 and A2 byte 42 of the main signal S1 and distributes the main signal S3a after the insertion of the path pattern to the active system device 30 and the redundant system device (not shown). The # 1 package 31 located at the beginning of the active system device 30 and receiving the signal S3a is
The path pattern terminating circuit (TE) 22a belonging to the receiving system terminates the path pattern in the signal S3a, and the path pattern check of the terminated path pattern detects an abnormality in the preceding package (here, the main signal distribution package 1a). The abnormality of the own package 31 was detected by monitoring the signal level of the own package # 31. Then, the faulty package is specified and switching to the redundant system device is executed.

In the path pattern insertion circuit (IN) 23a belonging to the transmitting side of the # 1 package 31, this # 1
Main signal 3 obtained by processing signal S3 by package 31
Similarly to the path pattern insertion circuit 21a of the main signal distribution package 1a, the path pattern is inserted into the A1 byte 41 and the A2 byte 42.

Hereinafter, the # 2 package 32 and the n-th (n is a plural number) #n package 33, which are cascade-connected to the # 1 package 31, perform the same operation as the # 1 package 31. When the main signal S5a including the path pattern from the #n package 33 is terminated by the path pattern terminator 24a of the main signal selector package 2a and then selected by the package 2a based on the trigger, The output signal is S6.

Although FIG. 3 shows only the active system device 30, the redundant system device also includes a package similar to that of the active system. Further, the main signal distribution package 1a is the first transmitting side package of each of the active system and the redundant system device, and the main signal selector package 2a is the last receiving side package. Between the main signal distribution package 1a and the main signal selector package 2a. Is the switching unit between the active system and the redundant system.

[0009]

In this conventional in-device supervisory control system for an SDH communication device, each package belonging to the above-mentioned active system and redundant system device monitors the path pattern from the preceding package and the level of its own package. The monitoring results are collected, the CPU included in this device identifies the faulty package, and if the faulty package has a redundant configuration, the switching operation to the redundant system is performed after the CPU processing. There was a problem that it took time to switch between and.

[0010]

An in-device supervisory control system for an SDH communication device according to the present invention is an in-device self-monitoring control system for an SDH communication device having an active system device and a redundant system device each including a plurality of packages. And a path for inserting the first path pattern into the A1 byte of the received main signal composed of the SDH transmission frame arranged in the first package of the switching unit and inserting the second path pattern into the A2 byte of the main signal. Pattern inserting means, A1 byte terminating means arranged in each of the packages of the active system and the redundant system to monitor the first path pattern by terminating the A1 byte from the received main signal, and the active system and An A1 bus for newly inserting the first path pattern into the A1 byte of the main signal which is arranged in each package of the redundant system device and is transmitted. And a path pattern terminating means arranged in the last package of the switching unit and terminating the A1 byte and the A2 byte from the received main signal to monitor the first and second path patterns. There is.

In this in-device self-monitoring control system of the SDH communication device, the path pattern inserting means is arranged in a main signal distribution package for distributing the received main signal to the working system and the redundant system device, and the path pattern termination is provided. The means may be arranged in the main signal selector means for selecting one of the transmission main signals from the working system and the redundant system device.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings. FIG. 1 is a block diagram of an SDH communication device having an embodiment of an in-device supervisory control system of the present invention.

The main signal distribution package 1 is the SD described above.
The main signal S1 having the H transmission frame 40 is distributed to the main signals S2 and S3 by the signal distributor (DIS) 14, and the main signal S3 is supplied to the active system device 3 and the main signal S2 is supplied to the redundant system device 4. The active system device 3 (that is, the # 1 package 11,
(Including # 2 package and #n package 13)
The main signal S3 is SDH processed, and the main signal S5 is output to the main signal selector package 2. On the other hand, the redundant system device 3
Processes the main signal S2 and outputs the main signal S4 to the main signal selector package 2. The main signal selector package 2 uses the selector (SEL) 15 to set the active device 3
From the redundant system device 4 or the main signal S5 from the
4 is selected, and the selected main signal S6 is output. That is, if any one of # 1, # 2 and #n packages 11 to 13 of the active system device 3 fails, the selector package 2 switches from the active system device 3 to the redundant system device 4, The disconnection of the main signal S6 is prevented. The signal distributor 14 of the main signal distribution package 1 is the first transmitting side package of the active system and the redundant system, and the selector 15 of the main signal selector package 2 is the last receiving side package. The space between them is the unit for switching between the active system and the redundant system.

FIG. 2 is a block diagram of the active system device 3 in the embodiment of FIG. 1 focusing on the in-device monitoring means.

The main signal distribution package 1 distributes the main signal S1 to the active system device 3 and the redundant system device 4 (not shown), and the main pattern S1 is shown in FIG. Path patterns are respectively inserted in the A1 byte 41 and the A2 byte 42, and the signal S3 including these path patterns is sent to the active system device 3. The # 1 package 1 located at the beginning of the active system device 3 and receiving the signal S3
1 is A by the termination circuit (TE) 22 belonging to the receiving side.
The 1-byte 41 is terminated, and the path pattern of the A1 byte 41 is identified as a path pattern abnormality. A1 byte 4
If the path pattern of 1 is abnormal, # 1 package 11
Creates a trigger for switching to the redundant system device 4 and FAIL orientation. The # 1 package 11 processes the main signal S3 excluding the A2 byte 42, and supplies the signal S11 into which the processed data 43 has been inserted and a new A1 byte 41 has been inserted to the # 2 package 12. Also, the # 1 package 11
Similar to the device of FIG. 3, the abnormality of the own package 11 is detected by monitoring the level of the signal in the own package # 11.

Hereinafter, the # 2 package 12 and the n-th (n is a plural number) #n package 13 connected in series to the # 1 package 11 are also similar to the # 1 package 11.
A1 byte 4 included in main signal S3 by termination circuit 22
The pass pattern check of No. 1 is performed, and if there is an abnormality in the pass pattern, the above trigger is created. The # 2 package 12 and the #n package 13 have signals S12 and S1 in which the processed data portion 43 and the new A1 byte 41 are inserted.
3 is output.

The # 1 to #n packages 11 to 13
Outputs the A2 byte 42 in the main signal S3 as it is to the output signals S11 to S13 without performing signal processing.

A1 byte 4 from the #n package 13
Main signal S including 1, A2 byte 42 and data portion 43
5 (S13) is an output signal S6 when the path pattern terminator 24 of the main signal selector package 2 terminates the path pattern in the A1 and A2 bytes 41 and 42 and then is selected by the selector 15. . The redundant system device 4 (not shown) also performs the same operation as that of the active system device 3 described above.

As described above, in the in-device supervisory control system of this SDH communication device, the A1 byte 41 and the A2 byte 42 of the main signal S1 in the switching unit first package 1 are used.
Each of the packages 11 forming the active and redundant devices 3 and 4 by inserting a path pattern into each of the
The path pattern in the A1 byte 41 is monitored on the receiving side of ~ 13, and the above A
The path pattern in the 2-byte 42 also ends. Therefore, since the A2 byte 42 can monitor the path pattern signal without leakage through the switching unit, when a path error occurs in the active system device 3 and the redundant system device A2,
A system failure can be detected by monitoring only the byte 42, and a high-speed switching operation can be performed using only the A2 byte 42 abnormality as a switching trigger. In addition, the failure package is identified by A1 on the receiving side of each of the packages 11 to 13 described above.
It can be easily identified by monitoring the path pattern of the byte 41 and monitoring the abnormality in the package by monitoring the level.

[0020]

As described above, according to the present invention, the S from the transmitter of the first package of the active system and the redundant system switching unit.
A1 byte and A of main signal with DH transmission frame
A path pattern is inserted into each of the 2 bytes, and in the intermediate package, a pattern check of only the A1 byte is performed to detect an abnormality in each package. In addition, the A2 byte is also terminated in the last package of the switching unit, the respective path patterns are checked, and an abnormality through the switching unit is detected. Therefore, it is possible to monitor the path pattern without the omission of the switching unit by the A2 byte, and it is possible to perform the high-speed switching operation from the active system to the redundant system triggered by the abnormality of the A2 byte. In addition, the specification of the faulty package has an effect that it can be easily specified by the in-package abnormality monitoring such as the path pattern monitoring and level monitoring in the A1 byte of each package.

[Brief description of drawings]

FIG. 1 is a block diagram of an SDH communication device including an embodiment of an in-device monitoring control system of the present invention.

FIG. 2 is a block diagram of an active system device 3 focusing on the in-device monitoring means in the embodiment of FIG.

FIG. 3 is a block diagram focusing on in-device monitoring means of an SDH communication device to which a conventional in-device monitoring control method is applied.

FIG. 4 is a signal configuration diagram of an SDH transmission frame.

[Explanation of symbols]

1, 1a Main signal distribution package 2, 2a Main signal selector package 3,30 Active system device 4 Redundant system device 11,31 # 1 package 12,32 # 2 package 13,33 #n package 14 Signal distributor (DIS) 15 Selector (SEL) 21, 21a, 23, 23a Path pattern insertion circuit (IN) 22, 22a, 24, 24a Path pattern termination circuit (TE)

Claims (2)

[Claims] 1. An in-device self-monitoring control system for an SDH communication device comprising an active system device and a redundant system device each including a plurality of packages, wherein the SDH transmission frame is arranged in the first package of a switching unit and is received. And a path pattern inserting means for inserting a first path pattern into the A1 byte of the main signal and a second path pattern into the A2 byte of the main signal, and arranged in each package of the active system and the redundant system device. A1 byte terminating means for terminating the A1 byte from the received main signal to monitor the first path pattern, and A1 byte of the main signal arranged in each package of the active system and the redundant system for transmission. A1 byte insertion means for newly inserting the first path pattern, and before the reception in the last package of the switching unit. An in-device self-monitoring control method for an SDH communication device, comprising: a path pattern terminating means for terminating the A1 byte and the A2 byte from a main signal to monitor the first and second path patterns. 2. The path pattern inserting means is arranged in a main signal distribution package for distributing the received main signal to the working system and the redundant system device, and the path pattern terminating means is provided from the working system and the redundant system device. 2. The in-device self-monitoring control system for an SDH communication device according to claim 1, wherein said SDH communication device is arranged in main signal selector means for selecting either one of said transmission main signals.