KR100220228B1 - Apparatus for controlling state transfer in the duplication architecture - Google Patents

Abstract

The present invention relates to a state transition control device for quickly controlling a state transition so that an error occurrence in an ISDN device control system having a redundant structure can be automatically monitored to minimize data loss in case of an error. To this end, the state transition control apparatus according to the present invention comprises a first logic element (G1) for logically combining the error transition signal (FAULT1) and the activation request signal (EN1) provided from the counterpart control system with the state transition controller provided therein. ) And the signal output from the first logic element G1 and the error occurrence detection result signal FAULT0 of the own control system provided from the error detection unit 100 are logically combined with the activation request signal EN0 of the own control system. It is improved to include a second logic element G2 that provides an output enable signal OUT0.

Description

Status Transition Control Unit in Redundant Structure {APPARATUS FOR CONTROLLING STATE TRANSFER IN THE DUPLICATION ARCHITECTURE}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a state transition control apparatus in a redundant structure. In particular, the present invention relates to a state transition control device in a redundant information structure (ISDN) device control system. It relates to a state transition control device.

The ISDN device control system having a redundant structure is provided with two control systems having the same structure, set to an active state and an inactive state, and operated using the control system set to the active state. It transitions to the active state and continues to perform the same function.

The state transition between these two control systems is mostly made when local error occurs in the control instrument operated in the active state. Local errors can include errors that occur when communicating with higher-level processors or ISDN devices, clock errors, frame synchronization errors, errors on internal buses, power supply errors, and errors caused by control system board failures. There is a need for a technique for minimizing data loss during state transition.

Accordingly, it is an object of the present invention to provide a state transition control apparatus for controlling a state transition to be performed quickly in order to minimize the data loss when an error occurs by automatically monitoring the occurrence of an error in the ISDN device control system having a redundant structure.

The state transition control apparatus according to the present invention for achieving the above object, the error detection unit for detecting whether the error of the own control system is transmitted to the counterpart control system, the output signal of the error detection unit and the error on the counterpart control system transmitted from the counterpart control system In the state transition control apparatus of the integrated information communication network device control system having a redundancy structure having a state transition control unit for controlling the state transition of the own control system by the occurrence signal and the activation request signal, the state transition control unit is provided from the counterpart control system The first logic element for logical combination of the error occurrence signal FAULT1 and the activation request signal EN1, the signal output from the first logic element, and the error occurrence detection result signal FAULT0 of the own control system provided from the error detection unit. ) To the activation request signal (EN0) and output in of the own control system. Claim to provide a block signal (OUT0) is characterized in that it comprises a second logic element.

1 is a detailed view of a state transition control apparatus according to the present invention in a redundant structure.

* Explanation of symbols for main parts of the drawings

100: error detection unit 110: state transition control unit

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

1 is a detailed view of a state transition control apparatus according to the present invention, which is applied to an ISDN device control system having a redundant structure.

Referring to FIG. 1, the state transition control device includes an error detection unit 100 and a counterpart control system (not shown) for detecting whether an error has occurred for local errors generated in an ISDN device control system (hereinafter, referred to as a control system). A signal indicating whether an error has occurred (Function Alarm, hereinafter referred to as FAULT1) and an activation request signal (Active Request, EN1) and a signal indicating whether an error has occurred in the own control system output from the error detection unit 100 (Function Alarm) And a state transition controller 110 for outputting the activation request signal EN0 of the own control system and the output enable signal OUT0 of the own control system by logical combination of the following.

The error detection unit 100 of the state transition control device configured as described above uses a processor bus signal, a device bus signal, and a status signal of its own control system as input signals. By comparing and verifying the input signal, the above-described local error occurrence is detected, such as an error in communication with an upper processor, an error in communication with a device, and an error occurring on its own control system. At this time, the error detection unit 100 always monitors the input signals, and immediately outputs a FAULT0 signal as a signal indicating an error occurrence state as soon as an error occurs. The FAULT0 output from the error detector 100 is transmitted to the state transition controller 110 and the state transition controller not shown in the counterpart control system.

The state transition control unit 110 includes a FAULT1 signal provided from an error detection unit (not shown) having the same structure as the above-described error detection unit 100 provided in the counterpart control system (not shown), and an activation request signal of the counterpart control system ( Logic element G1 which negatively sums EN1), and logic element G2 which logically sums the signal output from the logic element G1 and the FAULT0 signal output from the error detection unit 100, thereby activating its own control system. To control. That is, when the FAULT1 and EN1 signals provided from the counterpart control system (not shown) and the FAULT0 signal of the own control system are always monitored, the FAULT0 signal is low (where an error occurs here). If it is set to high but the logic state can be set differently), the state transition control unit 110 transmits to the counterpart control system and the state transition controller 110 outputs an activation request signal of its own control system to be activated. Hereinafter referred to as EN0) and the output enable signal OUT0 in a low state. The output enable signal is a signal provided to open the output when the magnetic control system is active and to limit the output when the control system is inactive.

On the other hand, when the own control system is in an inactive (or standby) state, the FAULT1 transmitted from the counterpart is applied to a logic state indicating a normal state (here, low state), and the EN1 signal is required to be active (low state). When it is applied and FAULT0 is in a low state (no error occurs), the state transition control unit 110 outputs EN0 and OUT0 so that its own control system becomes inactive. The carnomap of EN0 outputted for these three input signals is shown in Table 1.

FAULT1 * EN1 FAULT0 0 One 11 10 0 One 0 0 0 One One One One One

As described above, the present invention in the ISDN device control system having a redundancy structure automatically monitors the errors occurring in the own control system and the errors and activation request signals generated from the counterpart control system, thereby making a quick state transition when an error occurs. By doing so, it is possible to minimize data loss during transmission and reception during the state transition.

Claims (2)

An error detector which detects whether an error of the own control system has occurred and transmits it to the counterpart control system, and the state of the own control system by an error occurrence signal and an activation request signal for the counterpart control system transmitted from the counterpart control system. In the state transition control apparatus of the integrated information communication network device control system having a redundant structure having a state transition control unit for controlling the transition, The state transition control unit includes a first logic element for logically combining the error occurrence signal FAULT1 and the activation request signal EN1 provided from the counterpart control system; The combination of the signal output from the first logic element and the error occurrence detection result signal FAULT0 of the own control system provided from the error detection unit logically combines the activation request signal EN0 and the output enable signal of the own control system. And a second logic element providing (OUT0). The method of claim 1, And the first logic element comprises an element that negatively sums two signals to be applied, and the second logic element comprises an element which ORs two signals to be applied.