JPH05257673A - Old file reserving method at the time of updating file - Google Patents

Abstract

PURPOSE:To quickly switch a new file to an old file, in the case where normality of the new file is not confirmed. CONSTITUTION:This method is provided with an updating file transfer means 1 of an ACT system for transferring an updating file transferred from a host device to an SBY system through the ACT system, a system switching means 2 for executing system switching of an ACT system/an SBY system by an acknowledge signal ACK from the SBY system by an updating file transfer completing signal from a host device, a processing start informing means 3 for informing a processing start of the updating file switched by the system switching means, and a discrimination instruction receiving means 4 from the host device for discriminating whether a processing of the updating file started by the processing start informing means is normal or not, and constituted so that in the case it is decided to be normal by a discriminating means, the processing is executed by the updated file, and in the case where it is discriminated to be abnormal, the system is switched to the SBY system by a system switching instruction from the host device, and the processing of the ACT system by an old file is restarted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an on-line file replacement method for a duplexer which downloads a program from a host device. FIG. 5 shows an example of the system configuration of the duplexer in the exchange. In the figure, 21 is a host device (CPU), 22 is a main memory device (MM), 23 is a subscriber control device, 24 is a subscriber terminal, and 25 is a subscriber trunk. The subscriber control device 23 has a dual structure of ACT system and SBY system, and is connected by a plurality of subscriber terminals 24 and a subscriber trunk 25 to perform subscriber control. The ACT-type and SBY-type subscriber control devices 23 each have a file memory, and download the program from the host device 21 to control the subscribers.

[0002] In recent years, with the integration of ISDN, the weight has shifted from the conventional circuit switching technology typified by connection of voice and the like to packet switching technology having an error recovery function. With this packet switching technology, a device-specific program is downloaded from a higher-level device in order to comply with international recommendations and meet the demands of communication institutions (users) in each country, and when file update fails during file update. , It is necessary to switch back to the old file promptly.

[0003]

2. Description of the Related Art Conventionally, in a duplexer in which only an ACT system can communicate with a host device, the processing unique to a file is interrupted,
The files were replaced by downloading the new file again to the ACT system. Therefore, the old file was not saved when the file was updated after the replacement. A sequence diagram in the conventional file update is shown in FIG.
The figure shows A after the file is updated offline in the ACT system.
The state in which the system is switched from the CT system to the SBY system is shown. (1) 'A host device sends a temporary stop signal to the active ACT system to temporarily suspend subscriber line control, and (2)' A host device sends an update file to the ACT system.
The file of CT RAM is updated. (3) 'When the sending of the update file from the host device is completed,
A transfer completion signal is sent to the ACT system, and the ACT system restarts the operation that was temporarily stopped. (4) 'Send a memory copy request for the update file to the SBY system from the upper device to the ACT system. (5) 'The program copy updated from the ACT system is SBY
It is sent to the file of the system and the file is updated. (6) 'When a failure occurs in the ACT system, this is detected and the system is switched to the SBY system by register access. After that, S
Subscriber control is performed by the updated file of BY system.

[0004]

In the conventional method, when the file is updated, the process is switched from the old file to the update file. At this time, if the update file does not operate normally, the process unique to the device is interrupted. , I had to download the old file again from the initial state. Therefore, in the ACT system, there has been a problem that the processing interruption time unique to the apparatus for file replacement becomes long.

According to the present invention, when updating a file, the old file is stored until the normality of the updated file is confirmed. If the updated file does not operate normally, the file is immediately switched back to the old file and the file is replaced. The purpose is to cancel.

[0006]

FIG. 1 is a block diagram showing the principle of the present invention. In the figure, 1 is an ACT for transferring an update file transferred from a higher-level device to the SBY system via the ACT system.
System update file transfer means, 2 is an acceptance signal AC from the SBY system in response to an update file transfer completion signal from the host device.
The system switching means 3 for switching the system between the ACT system and the SBY system by K, the processing start notifying means 3 for notifying the host device of the processing start of the update file switched by the system switching means, and the 4 processing start 7 shows a determination instruction receiving unit from a higher-level device that determines whether the processing of the update file started by the notification unit is normal.

Reference numeral 5 is a processing execution means for executing processing by an update file when the judgment instruction receiving means determines that the update file is normal, 6 is update file transfer means for transferring an update file copy to the SBY system and erasing the old file, 7 Is a system switchback means for switching back the system in response to a system switchback instruction from the host when the judgment instruction receiving means determines an abnormality, and 8 is an AC based on the old file when the system is switched back
Reference numeral 9 denotes a T-system process resuming means, and 9 denotes an ACT-system copy transmitting means for transmitting a copy of the old file to the SBY system and erasing the updated file.

According to the present invention, when the file is updated from the host device, the file is updated in the SBY system and then the ACT system / S.
The BY system is switched, and whether or not the ACT system update file is normal is determined from the host device. If the ACT system update file is normal, the process is executed using the ACT system update file, and the SBY system old file is updated. If the judgment result is abnormal, set the SBY system to
Switch back to the CT system and restart processing with the old file of the ACT system. In that case, the SBY system update file is also switched back to the old file.

Therefore, when the file is updated from the host device, the old file is AC until the update file is determined.
Since it is saved in the T system, even if the file update fails,
Device-specific processing is interrupted only for a moment to switch back to the old file, and if the file update is normal, the update file is executed by the ACT system, so switching from the ACT system to the SBY system is performed. Only for a moment
Unlike the conventional case, it is not necessary to take an operation stop time for file update or file switchback.

[0010]

The process flow chart of the present invention is shown in FIG. In the figure, the NO.1 device is the ACT system, and the NO.2 device is SBY.
The processing flow when updating a file when used as a system is shown below.

When the NO.1 device is operating as the ACT system, (1) update file data is sent from the host device to the ACT system NO.1.
The device receives. (2) Transfer the updated file data to the SBY system No. 2 device. (3) Receive the update file data transfer end signal from the host device. (4) Transfer the transfer end signal to the SBY system No. 2 device. (5) Receive the ACK signal of the transfer end signal from the SBY system NO.2 device. (6) Perform ACK / SBY system switching operation.

The NO.2 device becomes the ACT system, and the processing shifts to the NO.2 device. In the NO.2 device, (7) The process start notification is sent from the NO.2 device to the host device. (8) Receive the update / old file selection instruction from the host system. (9) Check whether the selection instruction is an update file or an old file. (10) If it is determined that the file is an update file, the memory content of the update file is copied and sent to the SBY system No. 1 device. (11) If it is determined that the file is old, ACT / SBY system switching is performed.

The NO.1 device becomes the ACT system, and the processing shifts to the NO.1 device. In the NO.1 device, (12) Notify the upper device of the restart of processing with the old file. (13) Copy the memory contents of the old file to the SBY N
O.2 Send to device.

[0014]

FIG. 3 and FIG. 4 are sequence diagrams of an embodiment of the present invention.
Shown in. The sequence diagram (part 1) of FIG. 3 shows the case where the update file is normal, and the sequence diagram (part 2) of FIG. 4 shows the case where the update file is abnormal. In the figure, the redundant control device has NO.1 as an ACT system and NO.2 as an SBY system,
NO.1 becomes SBY system and NO.2 becomes ACT system by system switching. The upper device indicates the CPU of the exchange.

When the update file shown in FIG. 3 is normal, (1) In order to update the subscriber control program from the host device, the file data is newly divided into small blocks and the address information is added and transmitted. (2) The updated file data is sent to the SBY system NO.2 device via the ACT system NO.1 device. The update file data is sequentially transmitted from the upper device to the SBY system No. 2 device for each small block. (3) When the transfer of the update file data is completed, an update file transfer completion signal is transmitted from the host device to the SBY system NO.2 device via the ACT system NO.1 device. During this time ACT
NO.1 device of the system continues to operate with the old file. (4) The SBY system NO.2 device receives the update file transfer completion signal and sends an acceptance signal ACK to the ACT system NO.1 device. (5) The ACT system NO.1 device switches the ACT / SBY system in response to the acceptance signal ACK from the SBY system NO.2 device, the NO.2 device becomes the ACT system, and the NO.1 device is SBY. Become a system. (6) The NO.2 device switched to the ACT system starts processing immediately and updates the subscriber control program with the update file to prepare for subscriber control. (7) Here, the host device checks whether the update file is normal or abnormal. This will check if the update file is garbled online. (8) If the host device determines that the update file is normal, it instructs the NO.2 device that the new program may be executed, and the NO.2 device executes the process as an ACT system. (9) The NO.2 device switched to the ACT system is the SBY system NO.1
Send a new update file copy to the device, N
O.1 Update the old file of the device with the new file. (10) If some trouble occurs in the NO.2 device switched to the ACT system, ACT / SBY remains as the update file.
Switch to NO.1 device.

When the update file in FIG. 4 is abnormal, the same state as in FIG. 2 is performed for (1) to (7). (11) When the host device determines that the update file is abnormal, it issues a system switchback instruction to the NO.2 device, and the NO.2 device executes ACT / SBY system switching. (12) The NO.1 device switched back from the SBY system to the ACT system restarts the subscriber control process by the old file maintained. (13) The NO.1 device sends the old file copy to the SBY system NO.2 device, and the updated file of the NO.2 device disappears and the old file is restored. (14) If some failure occurs in the ACT system NO.1 device, the ACT / SBY system switching is executed with the old file as it is to switch to the NO.2 device.

[0017]

According to the present invention, the old file is stored until the normality of the update file is confirmed. If the update file does not operate normally, the old file is promptly restored and the file is replaced. Abort. In other words, by saving the old file, even if the file update fails, the interruption time of the processing unique to the device can be instantly switched back to the old file.

[Brief description of drawings]

FIG. 1 is a block diagram of the principle of the present invention.

FIG. 2 is a processing flowchart of the present invention.

FIG. 3 is a sequence diagram of the embodiment (No. 1)

FIG. 4 is a sequence diagram (2) of the embodiment.

[Fig. 5] System configuration example of a duplexer

FIG. 6 is a sequence diagram of a conventional example.

[Explanation of symbols]

 1 Update File Transfer Means 2 System Switching Means 3 Processing Start Notifying Means 4 Judgment Instruction Receiving Means from Upper Device 5 Processing Execution Means 6 Update File Copy Transfer Means 7 System Switching Back Means 8 Processing Resuming Means 9 Copy Sending Means 21 Upper Equipment ( CPU) 22 Main memory device (MM) 23 Subscriber control device 24 Subscriber terminal 25 Subscriber trunk

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Nao Koga 3-9-18 Shin-Yokohama, Kohoku-ku, Yokohama-shi, Kanagawa Prefecture Fujitsu Communication Systems Limited (72) Inventor Junkie Morita Ueda, Nakahara-ku, Kawasaki-shi, Kanagawa Address 1015 Within Fujitsu Limited

Claims (1)

[Claims] 1. An online file replacement method for a duplexer for downloading a program from a host device, comprising update file transfer means (1) for transferring an update file transferred from the host device to an SBY system via an ACT system. The system switching means (2) for switching the system between the ACT system and the SBY system in response to the acknowledge signal ACK from the SBY system in response to the update file transfer completion signal from the host device, and the update file switched by the system switching means. Processing start notifying means (3) for notifying the upper apparatus of the processing start, and a judgment instruction receiving means from the upper apparatus for judging whether or not the processing of the update file started by the processing start notifying means is normal (4) is provided, and when it is determined to be normal by the determination instruction receiving means (4), the process is executed with the update file and it is determined to be abnormal. When switching back the system to SBY system by system switchback instruction from the host device, the old file storage method of updating files, characterized in that the resume processing the ACT by the old file.