KR100318758B1 - How to manage the subroot status in the sub system of the AT exchange - Google Patents

Abstract

The present invention relates to a sub route status management method in a sub-system of an ATM switch. In particular, an ATM which checks a sub-routing status of a large country after checking its own sub-root status when restarting a sub-system connected by a trunk line A sub route status management method in a subsystem of an exchange is provided.

The method of the present invention comprises the steps of initializing the sub-route to a reset state when two subsystems connected by the sub-route are restarted at the same time; Checking the subroutine status of the local station in the case where there is no abnormality in the entire system by checking the abnormality of each sub-system; When the local subroute state is in a normal state, managing the local subroute state as a normal state and then confirming a large sub-state; And when the sub-root state of the power station is in a normal state, managing the final sub-route state to a normal state. In this case, the method further includes a process of performing management in a state where the cause of the match is impossible by checking that the cause of the match is impossible.

Description

How to Manage Sub-Root Status in Subsystem of AT Switch

The present invention relates to a method for managing a subroute state in a sub-system of an ATM exchange, and more particularly, in a sub-system of an ATM exchange which checks a sub-route state after checking its own sub-route state when restarting a subsystem connected by a trunk line. A sub route state management method.

In a typical ATM exchange subsystem, restarting the subsystem is similar to rebooting a PC by restarting the entire system, where a board on which the main processor of the exchange is mounted is mounted. Restarting the entire system is accomplished by turning the power off and on or by entering a restart command from the operator terminal.

Then, the operation when the subsystem is restarted will be briefly described as follows.

When the subsystem is restarted, first, a driving program stored in an internal ROM performs an operation in an SM (System Management) block provided in an ATM switch. Thus, an application program (in an internal hard disk) is executed. Application Program) is loaded into Memory. Here, the SM block includes a failure management block, a performance management block, a shape management block, a security management block, a traffic management block, and the like, although not shown in the drawings for convenience of description. Perform discovery, isolation and recovery from the same problem.

Accordingly, the loaded application program is executed to play a role required for restarting the respective sub-systems. At this time, the state of the entire system is checked whether there is an error, and the sub-root state is also checked.

Here, the corresponding subroute is a passage connecting the exchange and the exchange, and the message can be smoothly transferred between the exchanges only when the state of the subroute is normal.

And the call processing request (e.g. telephone, video conferencing, PC communication, etc.) of an operator at any one exchange is handled within the exchange when the call is between subscribers of the exchange itself, but is a call with a subscriber existing at another exchange. In this case, the call processing is performed in the case of the corresponding subroute, and data transfer is performed during the exchange.

Since the state of the subroute is determined according to the states of the exchanges connected to each other, when a factor causing a change in the state of the subroute occurs, the exchanges exchange state information with each other to determine the final state of the subroute. Will be decided.

At this time, the state of the subroute that can be determined can be divided into 'NORM', 'BLK', 'LCL_BLK', 'RMT_BLK' and 'RESET', and the 'NORM' is the normal state. 'BLK' indicates the status of disabling the use of the sub-route when the operator inputs the disable command through the operation terminal as necessary in the disabled state, and 'LCL_BLK' indicates The subroutine cannot be operated due to the failure of its own exchange due to the failure of its own station. The 'RMT_BLK' indicates the inability to operate the subroute due to a problem of the major exchange due to the problem of the power exchange. 'Indicates a state in which the initialization of the sub route is in progress as a reset state.

Meanwhile, in the sub-system of the conventional ATM switch, an operation for determining the state of the sub-route and determining the state thereof will be described with reference to the configuration diagram of FIG. 1 and the flowchart of FIG. 2. 1 is a block diagram schematically illustrating a connection between subsystems in a conventional ATM switch, and FIG. 2 illustrates an example in which a problem may occur when an operation is performed in a sub-root state management method in a subsystem of a conventional ATM switch. It is a flow chart.

First, when each sub-system 11, 12 of two ATM exchangers connected to a relay line, i.e., sub-route, is restarted at the same time, the two sub-systems 11, 12 initialize the sub-route to reset the reset state. After driving, the subroutine transitions to the normal state (NORM).

At this time, the first sub-system 11 first checks whether the state of the sub-route, which is the second sub-system 12, is normal (NORM), and then checks whether the state of the own station is normal (NORM). In addition, the second sub-system 12 also checks whether the state of the sub-route, which is the first sub-system 11, is normal (NORM) first, and then checks whether the state of the own station is normal (NORM). do.

Then, the final state is determined, that is, the deactivation state in which the subroute is suspended when the subroutine is entered through the operation terminal as necessary, or if the subroutine is in normal operation (NORM). (BLK) to determine whether the subroutine cannot be operated due to the failure of its own exchange (LCL_BLK), or if the subroute cannot be operated due to the problem of the power exchange. do.

However, when restarting the two subsystems 11 and 12 simultaneously, a status check may be delayed in each of the subsystems 11 and 12.

In other words, the sub-route may be created within one subsystem but is connected to another subsystem because it is created for the purpose of connecting to each other subsystem, i.e. for different reasons, the time to check the status is different. Rather than a few milliseconds or a few nanoseconds, the point at which the state is checked is slightly different. If the difference occurs, even if the subsystem is restarted at the same time, an error may occur by the operator or may occur at the restart stage.

However, when the state management is performed by the sub-route state management method in the conventional ATM switch as described above, as shown in FIG. 2, the second sub system 12 on the power station side is restarted to reset the initial state (RESET). The state check is performed in the first sub system 11 on the host side immediately before the transition to the normal state (NORM), so that the second sub system 12 on the counter side is in a reset state instead of the normal state (NORM). Can be managed with (RESET). Therefore, it is necessary to restart the two subsystems 11 again to perform repetitive operation to be managed in the normal state (NORM).

As such, in the conventional ATM switching system, when the sub-root state management method attempts to check the state of another system in one system, it is not known whether the check of the state is completed in that other system, If it is not determined, the state is imported as it is, there is a problem that the correct state management is not achieved.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and its object is to check the sub-routing status of the sub-route after checking the sub-routing status of its own country when restarting the sub-system of the ATM exchanger connected by the relay line, so that the correct sub-route status is determined. To manage.

1 is a block diagram schematically illustrating a connection between sub-systems in a typical ATM switch.

2 is a flowchart illustrating an example that may be caused by a problem when performing an operation in a sub-route state management method in a subsystem of a general ATM switch.

3 is a flowchart illustrating a method for managing a subroute state in a subsystem of an ATM exchange according to an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

The present invention for achieving the above object comprises the steps of initializing the sub-route when the two systems connected to the sub-route restarted to switch to the reset state; Checking the subroutine status of the local station in the case where there is no abnormality in the entire system by checking the abnormality of each sub-system; When the local subroute state is in a normal state, managing the local subroute state as a normal state and then confirming a large subroutine state; And managing the final subroot state to a normal state when the sub-root state to the normal state is normal.

Alternatively, the present invention further comprises the step of performing the management in the state of the state of non-causation by checking that the state of the state of sub-roots is not possible when the sub-root state is managed in the disabled state or the cause of the own country. It is done.

According to the present invention, when the sub system restarts, the local sub route status is checked first, and after the state management is performed normally, when the sub sub route status is confirmed, even the large station checks its own sub root status, so as to determine the correct sub sub route status. To ensure accurate final state management. That is, the conventional method determines the final state by checking the sub-root status of the local station after confirming the sub-root status of the power station. However, in the present invention, the sub-root status of the power station is checked after confirming the own sub-root status first.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In the ATM switch according to the embodiment of the present invention, the connection between the subsystems is similar to that shown in FIG. 1 of the prior art, and thus description thereof is omitted.

Referring to the flowchart of FIG. 3, a method for managing a sub route state in a subsystem of an ATM exchange according to an embodiment of the present invention is as follows.

First, when a relay line, that is, two subsystems connected as sub-roots, is restarted at the same time, that is, the board in which the main processor inside each subsystem is mounted is powered off and turned on, or the operator may restart the command through the operation terminal. If you enter, each of the corresponding subsystems will run the drive program stored in the internal ROM.

Accordingly, each of the subsystems loads an application program from the internal hard disk into a memory, executes the loaded application program, and plays a role necessary for restarting by the corresponding application program. It checks whether there is a status, and also checks the subroot status.

In other words, in each of the sub-systems, the sub-route is initialized and driven to a reset state (RESET), and then the sub-route is transferred to a normal state (NORM) in which the sub-route can be operated. The system checks whether there is any problem in the entire system of the system and first checks whether its own sub-root related state, that is, its own sub-root state is normal (NORM), only when there is no problem in each of its own systems. Step S1).

If, in the first step (S1) the host sub-route state is not the normal state (NORM), when the operator inputs a stop command through the operation terminal as necessary, the suspended state (suspended use of the sub-route ( BLK) or the local cause impossible state (LCL_BLK) in which the subroute cannot be operated due to the failure of the local exchange system, and the management is performed in the disabled state (BLK) or the local cause impossible state (LCL_BLK).

On the other hand, if the local subroot state is NORM in the first step S1, the local subroot state is managed in the normal state (NORM) and at the same time (step S2), another subroutine connected to the subroot is performed. First, it is checked whether or not the sub-root related state of the subsystem, that is, the sub-root state of the game, is normal (NORM) (step S3).

Here, in the third step S3, the sub-root state of the power station is not a normal state (NORM), but an abnormal state, that is, the sub-system sub-state uses the sub-root state of its own (BLK) or cannot cause the own station (LCL_BLK). If it is managed by the system, check that it is the non-cause state (RMT_BLK) that the subroutine cannot operate due to the problem of the power exchange, and apply it to its own station as an abnormal state, that is, the non-cause state (RMT_BLK).

In other words, if another subsystem connected to the sub-root is managed in a disabled state (BLK) or a non-local cause state (LCL_BLK) due to a failure, in the own subsystem, it is normal or that other subsystem is The management is performed in a state of no cause reason RMT_BLK indicating that it is a failure state (step S4).

On the other hand, if the sub-route state of the power station is normal (NORM) in the third step (S3), that is, the sub-route of the power after the state management to the normal state (NORM) after confirming that the own sub-route state is normal (NORM) If it is confirmed that it is the normal state (NORM) by checking whether it is the normal state (NORM), because the sub-system of the power station also confirmed that the sub-root state is the normal state (NORM), it is possible to determine the exact state of the sub-root route to the final sub-route. Confirming that the state is a normal state (NORM), it is possible to perform accurate final state management (step S5).

As described above, according to the present invention, upon restarting the sub-system of the ATM switch connected to the sub-route, the sub-routing state of the local station is checked and managed in the normal state, and then the sub-route state of the power station is checked to manage the correct sub-route state.

Claims (2)

Initializing the subroute to a reset state when restarting two sub-systems connected by the subroute simultaneously; Checking the subroutine status of the local station in the case where there is no abnormality in the entire system by checking the abnormality of each sub-system; When the local subroute state is in a normal state, managing the local subroute state as a normal state and then confirming a large country subroute; And managing the final sub-root state to a normal state when the power sub-root state is a normal state. The method of claim 1, When the sub-root state of the power management is managed in the disabled state or the cause of the own country, the state of the power source is not possible to perform the management to the state of the non-cause cause further comprises the step of How to manage subroot status in the subsystem.