JPH05300060A - Hot standby system for backup master station - Google Patents

Abstract

PURPOSE:To shorten the time required for changeover between a backup use master station and a master station in operation by a VSAT network. CONSTITUTION:When an addition/elimination request of a master station comes to a network 3, a configuration management section 21 revises a database 24 in which a program type used by the master station is registered in operation and a database 23 registering a program type used in common by the entire master stations in operation and sends a message to a monitor console 1 when the database 23 is revised. When a host standby request comes to a backup master station from the network operator, a master station management section 22 implements re-load processing of a program registered to the database 23 to the backup master station. As a result, when the master station in operation and the backup master station are changed over, the time for the backup master station for re-loading the program is reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot standby system for a backup master station in an N: 1 redundant VSAT network.

[0002]

2. Description of the Related Art When a trouble occurs in a current master station such that a failure occurs in the current master station, the master station is switched to leave the function to the substitute master station. The substitute master station is called the backup master station. The panel used in the master station includes a panel that is used on all master stations and that is executed by the CPUs on that panel that is common to all master stations, and a program that is executed by the CPUs on that panel. There is a panel that may be different if it is the same between the parent stations. Then, when the operating master station is substituted by the backup master station, in order to make the backup master station the same state as the operating master station, the program executed by the CPU on each panel of the operating master station The same program needs to be loaded into the RAM on each panel on the backup master station.

Conventionally, it is used on all working master stations,
And the program executed by the CPU on that panel registers only the information of the panel program common to all the active master stations in the database, and the network operator loads the program to the specific panel of the backup master station. Therefore, when the backup master station hot standby request is made, the master station management unit is performing the program loading process for the backup master station.

[0004]

The above-mentioned backup master station hot standby system has the following problems. Only the program types for panels that are common to all active master stations are registered in the database, and the program types for panels that can execute different programs are not registered at all. Only preloads only programs known to be used by all master stations. Therefore, when switching between the operating master station and the backup master station, the program used in the panel that can execute a different program on the operating master station is displayed on the panel in the backup master station. It needs to be loaded into RAM, which increases the load time, that is, the switching time,
Communication between T network terminals is lost for a long time. An object of the present invention is to provide a hot standby system in which the switching time of the master station is shortened.

[0005]

According to the present invention, a step of changing the configuration of a working master station, a step of updating a program type registration database used by the working master station, and a common program between the working master stations are extracted. The step of updating the common program type registration database, and the step of reloading the program to the backup master station.

[0006]

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 apparatus used to implement the present invention. In the figure, 1 is a monitor console that provides a man-machine interface between an operator of the VSAT network 3 and a network management system 2 that monitors and controls the VSAT network.
VSAT network operator is VSAT network 3
To monitor and control the network management system 2, the command input unit 12 of the monitor console 1 executes monitoring and control commands to the network management system 2. The network management system 2 transmits various electronic messages to the VSAT network 3 in response to a request from the VSAT network operator, and receives the response. The result thus obtained is notified from the network management system 2 to the message display section 11 of the monitor console 1.

Next, the method of the present invention will be described with reference to the flowchart of FIG. The VSAT network operator requests the network management system 2 to add (delete) the active master station 33 to the VSAT network 3 through the command input unit 12 (S1). This request is received and processed by the configuration management unit 21. That is,
Master station 33 to be added (deleted) to the VSAT network
After registering (deleting) the program type to be executed by the CPUs on all the panels used in (2) in the program registration database 24 (S2), common program extraction processing is performed for all panels of all active master stations. In other words, check whether the same program is used among all active master stations for the panel that may execute different programs or may execute the same program, and if the same program is used Recognizes it as a common program and updates the common program registration database 23 (S3).

If the common program type before the processing and the common program type after the processing by the current master station addition (deletion) request are different from each other, it is determined that the difference has occurred.
A message is transmitted to the message display unit 11 to notify the T network operator (S4). The VSAT network operator notified of the message uses the command input section to set each panel 32 in the backup master station 31.
To the network management system 2 to reload the program (S5). This request is received and processed by the master station management unit 22. That is, based on the program type registered in the common program registration database 23 for the backup master station 31 in the VSAT network 3,
The hot standby program is loaded on each panel 32 in the backup master station 31 (S6).

With this arrangement, the common program between all active master stations in the VSAT network has already been loaded to the backup master station, so when the master station is switched, which active master station is used as the master program. Even if a station switching request is made, the time required for the backup master station to become operational, that is, the time required to load the program to the backup master station, because the number of programs to be loaded is smaller than or equal to that of the conventional method. Is shorter on average than the conventional method.

[0010]

As described above, according to the present invention, the configuration management unit adds and deletes the program to be executed by the CPU on the panel capable of executing a plurality of programs in the backup master station. At the same time, re-extract, V
When the common program type for all active master stations in the SAT network is changed, the database is updated and the VSAT network operator is notified of the change in the master station common program through the monitor console, and the VSAT network operator is notified. Request a hot standby request for the backup master station from the master station management section, and the master station management section should load the program into the RAM on each panel in the backup master station in advance based on the common program type in the database. Thus, when a request for switching to the backup master station is made to the active master station, there is an effect that the time required for the switching is further shortened.

[Brief description of drawings]

FIG. 1 is a system diagram for implementing the present invention.

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

[Explanation of symbols]

1 Monitor Console 2 Network Management System 3 VSAT Network 11 Message Display Section 12 Command Input Section 21 Configuration Management Section 22 Master Station Management Section 23 Common Program Registration Database 24 Program Registration Database Used by Current Master Station 31 Backup Master station 32 Panel to load the program in the backup master station 33 Working master station

Claims (1)

[Claims] 1. A first database for registering a program type executed by a CPU on each panel in the active master station,
A second database for registering a common program type among all active master stations, a configuration management unit for changing the configuration of the active master station and updating the first database and the second database, and a network operator From a master station management unit that performs a program reload process for the backup master station based on the common program type registered in the second database upon request, and a monitor console that is a man-machine interface with the network operator. Become N
In a network management system that manages a very small earth station (VSAT) network with a redundant configuration consisting of one active master station and one backup master station,
Steps for changing the configuration of the active master station, updating the program type registration database used by the active master station, extracting common programs between active master stations, and updating the common program type registration database And a hot standby method for the backup master station, which comprises a step of performing a program reload process for the backup master station.