JP2976897B2 - Data backup method for transmission equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data backup system, and more particularly, to a data backup system in a transmission apparatus including a plurality of packages.

[0002]

2. Description of the Related Art In electronic devices that require high reliability,
For example, as disclosed in Japanese Patent Application Laid-Open No. 59-98399, it is common practice to back up data in case of an unexpected event. The present invention is directed to data backup in a transmission device including a plurality of packages among such electronic devices. Hereinafter, a data backup method in a conventional transmission device will be described.

FIG. 7 shows an SDH (Sy) which is a kind of transmission apparatus.
nchronous Digital Hierarc
FIG. 2 is a block diagram showing a conventional configuration of a transmission device (SDH transmission device) to which the present invention is applied. As shown in the drawing, the conventional transmission apparatus is responsible for multiplexing, cross-connect, the overhead processing, and the like, a plurality of transmission package 8 ₁ ~8n responsible for processing of the signal through the transmission path, the management of the entire device It has a structure in which the management package 2 is detachably connected to the management common bus 1. Each transmission package 8 ₁
8n includes a bus control unit 5 connected to the management common bus 1 and a transmission circuit 9 for performing the above-described processing. The management package 2 includes a bus control unit connected to the management common bus 1. and part 5, and a managing circuit 3 to manage them by communicating with each transmission package 8 ₁ ～8N through the bus control section 5 and the management common bus 1.

[0004] In the transmission circuit 9 of the transmission package 8 ₁ ~8n, there is a latch unit 10 for holding a minimum configuration data necessary for the operation of each package, the transmission circuit 9 to the latch portion 10 It operates according to the stored setting data. The setting data includes registration status data, operation status data, and the like. The registration status data indicates whether the package is registered in the management package 2, and the transmission package is not registered until the registration status data is registered. Becomes operable. Further, the operation state data includes various types of data that specify the operation of the package during operation.

On the other hand, in the management circuit 3 of the management package 2, there are two types of memories, a working memory section 4 composed of a RAM or the like and a nonvolatile memory section 11. It holds a copy and various management data of the setting data for each transmission package 8 ₁ ~8n the nonvolatile memory unit 11. The management data includes the name of the transmission device, a password to be input when setting data is changed by an operator from an input / output device (not shown), and any failure when the management circuit 3 outputs an alarm to the input / output device (not shown). Various data mainly related to maintenance are included, such as alarm information indicating what grade of alarm is output.

[0006] managing circuit 3, when changing the configuration data of the transmission package 8 ₁ ~8n by an operator operating and fault processing etc., the setting data after the change in the working memory unit 4 and the nonvolatile memory portion 11 while saving written to the latch portion 10 of the transmission package 8 ₁ ～8N via a common administrative bus 1. When the management data in the working memory unit 11 is rewritten by an operator operation, the changed management data is also written in the nonvolatile memory unit 11.

[0007] copy the working memory section 4 of the setting data written to the latch portion 10 of each transmission package 8 ₁ ~8n
Is stored in the working memory unit 4 when the setting data of the latch unit 10 is lost due to a failure of any of the transmission packages 8i or when the data is replaced with a normal transmission package. This is so that the contents of the latch unit 10 of the transmission package can be restored to the original state by the data. The copy of the data in the working memory unit 4 is stored in the non-volatile memory unit 11 when the contents of the working memory unit 4 are lost due to a power-off of the management package 2 or the like. Part 11
This is because the contents stored in the working memory unit 4 can be restored to the original state by the data stored in the working memory unit 4.

[0008]

THE INVENTION Problems to be Solved] Thus, in the conventional transmission apparatus, the working memory unit 4 copies and various management data of the setting data written in the latch unit 10 of each transmission package 8 ₁ ~8n , And the reliability of the transmission device is enhanced by adopting a data backup system in which a copy of the working memory unit 4 is stored in the nonvolatile memory unit 11.

However, since the non-volatile memory unit 11 having a copy of the working memory unit 4 is incorporated in the same package as the working memory unit 4, that is, the management package 2, a failure occurs in the management package 2 itself. When this occurs, the backup data saved in the nonvolatile memory unit 11 cannot be effectively used. The reason is that when a failure occurs in the management package 2, a maintenance operation for replacing the management package 2 with a normal management package is performed, but the backup data stored in the nonvolatile memory unit 11 of the old failed management package 2 is read. This is because it is not easy and it is difficult to transfer the backup data to a new management package. Therefore, there is a problem that it takes time to return the transmission device to the original state.

An object of the present invention is to make data backup in such a transmission apparatus more reliable.

[0011]

In order to achieve the above object, the present invention provides a plurality of transmission packages operating in accordance with setting data latched in a latch unit, and a setting written in a latch unit of the transmission package. A management package for holding a copy of data and various management data in an internal working memory unit and managing the entire transmission apparatus, and these packages are detachably connected to a management common bus. In the data backup method in the transmission device, it is detachable to the management common bus,
In addition, there is provided a storage package for holding a copy of the setting data and the management data stored in the working memory section of the management package.

The present invention also provides the storage package,
An electrically erasable and readable and writable nonvolatile memory for holding a copy of the working memory is provided.

Further, according to the present invention, when the management package is connected to the management common bus, the setting stored in the nonvolatile memory section of the storage package via the management common bus is provided. The data and the management data are read out and written to the work memory unit in the own package.When the storage package is connected to the management common bus, the setting data stored in the work memory unit in the own package and The management data is written to the non-volatile memory section of the storage package via the management common bus, and is stored in the work memory section in the own package when the transmission package is connected to the management common bus. Write the relevant setting data to the latch section of the connected transmission package via the management common bus. It has a management circuit.

In the data backup method in the transmission apparatus according to the present invention, the nonvolatile memory section of the storage package different from the management package stores the setting data and the management data of the working memory section of the management package. If a failure occurs in the management package itself, the storage package is not affected, and the backup data is used to restore the working memory part of the replacement management package to its original contents. Can be restored.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing an example of a transmission apparatus to which the present invention is applied. The transmission device in this example is an SDH transmission device, and is used for transmitting a plurality of transmissions for processing signals passing through a transmission path, such as cross-connect and overhead processing, such as a cross-connect package, a main signal package, and an overhead processing package. the package 8 ₁ ～8N, a management package 2 in charge of management of the entire device, and further a storage package 6 of dedicated backup has a structure in which detachably connected to the management for the common bus 1.

[0017] Each transmission package 8 ₁ ～8N is detachable from the common bus 1 for managing by a connector or the like (not shown), a bus control unit 5 connected to the management common bus 1, and the And a transmission circuit 9 for performing each process. In the transmission circuit 9, there is a latch unit 10 for holding the minimum setting data necessary for the operation of each package, and the transmission circuit 9 operates according to the setting data held in the latch unit 10. The transmission circuit 9 also has a function of notifying the management package 2 of a change in the state of its own package via the management common bus 1.

The management package 2 is also detachable from the management common bus 1 by a connector or the like (not shown), and includes a bus control unit 5 connected to the management common bus 1 and a memory element such as a RAM. And a management circuit 3 having a working memory unit 4. This management circuit 3
It is constituted by MPU and a control program, etc., as well as manage them by communicating with each transmission package 8 ₁ ～8N via bus control unit 5 and the management common bus 1, transfer of the storage package 6 and the backup data And the like.

The storage package 6 is also detachable from the management common bus 1 by a connector or the like (not shown), and electrically connected to the bus control unit 5 connected to the management common bus 1 for erasing, reading, and writing. It has a possible non-volatile memory, for example, a non-volatile memory section 7 including an EEPROM or a FlashROM as a memory element.
A copy of the contents stored in the working memory unit 4 of the management package 2 is stored in the nonvolatile memory unit 7 as described later.

The working memory section 4 and the non-volatile memory section 7 include a memory control section for erasing, reading and writing the memory element, in addition to a memory element for storing data.

Next, the operation of the embodiment constructed as described above will be described.

In the transmission apparatus shown in FIG. 1, the transmission circuit 9 of each of the transmission packages 8 _{1 to} 8n is transmitted from the management circuit 3 of the management package 2 to the latch section 10 through the management common bus 1.
It operates according to the setting data latched in. In this case, a copy of the configuration data of each transmission package 8 ₁ ~8n is a working memory unit 4 of the management circuit 3 in the management package 2, it is held in non-volatile memory unit 7 in the storage package 6. Further, the working memory unit 4 also holds management data separately from the setting data,
A copy of the management data is also held in the nonvolatile memory unit 7 of the storage package 6.

FIG. 2 is an explanatory diagram of data stored in the working memory unit 4 and the nonvolatile memory unit 7. The storage area of the working memory unit 4 includes a setting data storage area 41 and a management data storage area 42.
Registration status data of the transmission package 8 ₁ ~8n, the copy 41 ₁ ～41N as in the prior art configuration data such as operational status data stored in the 1. The management data storage area 42 holds management data similar to the conventional management data such as the name of the transmission device, password, and alarm information.
Storage of the non-volatile memory unit 7 is also constructed from similarly setting data storage 71 and the management data storage 72, the setting data storage 71 in the setting data storage 41 the same each transmission package 8 ₁ Copy of 8n setting data 71 _1-
71n, and a copy of the management data storage area 42 is stored in the management data storage area 72.

In this state, when the management circuit 3 of the management package 2 changes the setting data of a certain transmission package in response to an operator operation from an input / output device (not shown), When the setting data is changed to perform a failure process such as switching the processing of one transmission package to another transmission package according to the failure report from the transmission package, the management circuit 3 performs the internal processing as shown in FIG. The changed setting data is written into the working memory unit 4 (S1), and the same change is made to the nonvolatile memory unit 7 through the bus control unit 5, the management common bus 1, and the bus control unit 5 of the storage package 6. The subsequent setting data is written (S2). For example, to change the configuration data of the transmission package ₈₁ is working memory section 4
In rewrites the 41 ₁ in the setting data storage 41 in FIG. 2, rewritten 71 ₁ in the setting data storage 71 in FIG. 2 in the non-volatile memory unit 7. Then, the changed setting data is transmitted through the common management bus 1 similarly.
It is written in the latch portion 10 of the transmission circuit 9 of the transmission package 8 ₁ ~8n applicable (S3).

In this way, the management circuit 3 manages the backup data of the latest setting data so as to always hold it in both its own working memory unit 4 and the nonvolatile memory unit 7 of the storage package 6. .

The management circuit 3 of the management package 2
When the management data is changed by an operator operation from an input / output device (not shown), the management data in the working memory unit 4 is updated, and at the same time, the bus control unit 5, the management common bus 1, and the storage package 6 are updated. The corresponding management data in the non-volatile memory unit 7 is similarly updated through the bus control unit 5, so that the copy of the management data in the working memory unit 4 is always copied to the non-volatile memory unit 7.
Manage to be kept in.

When a failure occurs in any of the packages in such a state and the replacement is performed, the following operation is performed.

(1) When replacing the management package 2 When a failure occurs in the management package 2, the management package 2 is removed from the management common bus 1, and a normal management package 2 is replaced with a normal management package 2. Maintenance work for connecting to the bus 1 is performed. At this time, when the normal management package 2 is connected to the management common bus 1 and operation power is supplied, the management circuit 3 starts the operation as shown in FIG. The setting data and management data stored in the setting data storage area 71 and the management data storage area 72 of the non-volatile memory section 7 are read out through the bus 1 and the bus control section 5 of the storage package 6, and are used for own work. Memory part 4
Setting data storage area 41 and management data storage area 42
(S11). Thereafter, the management circuit 3 starts the same operation as the conventional one, and starts managing the entire transmission apparatus.

(2) At the time of replacing the storage package 6 The management circuit 3 of the management package 2 sends a command for health check to another package via the management common bus 1, for example. The presence / absence of a failure in another package is monitored by the presence / absence of a health check response from the server. When a failure of the storage package 6 is detected by this method, the fact is displayed on an input / output device (not shown).
When a failure occurs in the storage package 6, the operator removes the storage package 6 from the management common bus 1 and performs a maintenance operation to connect a normal storage package 6 to the management common bus 1 instead. . By this maintenance work, the normal storage package 6 is transferred to the management common bus 1.
Is connected to the management circuit 3 of the management package 2
When it is detected that the normal storage package 6 is connected by the health check, as shown in FIG. 5, the data is stored in the setting data storage area 41 and the management data storage area 42 of the own working memory unit 4. The setting data and management data stored in the storage package 6 are read out through the bus control unit 5, the management common bus 1, and the bus control unit 5 of the storage package 6, and the setting data storage area 71 in the nonvolatile memory unit 7 of the storage package 6. Then, the data is written into the management data storage area 72 (S21). As a result, the backup system can be returned to the original state.

(3) When replacing the transmission packages 8 _{1 to} 8 n When the management circuit 3 of the management package 2 detects a failure of any of the transmission packages 8 i by a method such as a health check, the management circuit 3 sends it to an input / output device (not shown). Display that effect.
When a failure occurs in the transmission package 8i, a maintenance operation of removing the transmission package 8i from the management common bus 1 and connecting a normal transmission package 8i to the management common bus 1 is performed instead. When the normal transmission package 8i is connected to the management common bus 1, the management circuit 3 of the management package 2 detects that the normal transmission package 8i has been connected by the health check, and FIG. As shown in FIG.
The setting data of the transmission package 8i stored in the setting data storage area 41 is read and transmitted through the bus control unit 5, the management common bus 1 and the bus control unit 5 of the transmission package 8i. Writing to the latch unit 10 of the transmission circuit 9 (S
21). As a result, the original setting data can be reset in the transmission package 8i.

[0031]

As described above, according to the present invention, the following effects can be obtained.

Since the configuration data and the copy of the management data stored in the working memory section of the management package are held in the non-volatile memory of the storage package different from the management package, the management package Even if a failure occurs in itself, the storage package is not affected, and the contents of the working memory section of the replacement management package are restored to the original state using the backup data stored in the storage package. be able to.

Even if the backup data stored in the storage package becomes unusable due to a failure of the storage package or the like, the backup data exists in the working memory section of the management package. By copying the backup data from the working memory unit to the nonvolatile memory unit of the storage package after replacement, the original state can be easily restored.

At the time of replacement due to a failure of the transmission package, the original setting data can be restored to the latch portion of the transmission package after the replacement by the backup data stored in the working memory section of the management package. As described above, the backup data of the management package or the storage package after the exchange can be returned to the original state by the backup data of the storage package or the management package at the time of replacement of the storage package, so that any package can be quickly replaced. Response is possible.

According to the present invention, when the same data is set again in the exchanged package, the data can be set from another package in the transmission device via the common management bus, so that the backup data can be set outside the transmission device. , The time required for the setting can be reduced.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating an example of a transmission device to which the present invention has been applied.

FIG. 2 is an explanatory diagram of data stored in a working memory unit and a nonvolatile memory unit.

FIG. 3 is a flowchart illustrating an operation example of a management circuit of a management package when setting data is changed.

FIG. 4 is a flowchart illustrating an operation example of a management circuit when a management package is replaced.

FIG. 5 is a flowchart illustrating an operation example of a management circuit of the management package when the storage package is replaced.

FIG. 6 is a flowchart illustrating an operation example of a management circuit of a management package when a transmission package is replaced.

FIG. 7 is a block diagram illustrating a configuration example of a conventional transmission device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Common management bus 2 ... Management package 3 ... Management circuit 4 ... Work memory unit 5 ... Bus control unit 6 ... Storage package 7 ... Non-volatile memory unit 8 _{1 to} 8n ... Transmission package 9 ... Transmission circuit 10 … Latch

Claims (3)

(57) [Claims] 1. A plurality of transmission packages operating in accordance with setting data latched by a latch unit, and copies of setting data written in a latch unit of the transmission package and various management data stored in an internal working memory unit. And a management package that manages the entire device.In a data backup method in a transmission device in which these packages are detachably connected to the management common bus, A data backup method in a transmission apparatus, comprising: a storage package that is detachable and that holds a copy of setting data and management data stored in a work memory unit of the management package. 2. The data backup in the transmission device according to claim 1, wherein the storage package includes an electrically erasable and readable / writable nonvolatile memory unit that holds a copy of the working memory unit. method. 3. When the management package is connected to the management common bus of the own package, the setting data and management stored in the non-volatile memory unit of the storage package via the management common bus. Read out the application data and write it to the work memory section in the own package, and when the storage package is connected to the management common bus, the setting data and management data stored in the work memory section in the own package Is written to the non-volatile memory section of the storage package via the management common bus, and when the transmission package is connected to the management common bus, the corresponding data stored in the work memory section in the own package is written. A management circuit for writing setting data to be transferred to the latch section of the connected transmission package via the management common bus. 3. A data backup method in a transmission device according to claim 2, wherein: