KR19980034791A - Integrated Information Communication Network Device Control System with Dual Structure - Google Patents

Abstract

The present invention relates to an ISDN device control system having a redundant structure for maximizing the ability to cope with an abnormal state occurrence on the ISDN device control system. The apparatus includes an output control unit for controlling the output such that a bus collision does not occur when data is transmitted to a higher level processor or device through a bus shared with the counterpart control system; An error detection unit for detecting an error on its own control system; A state transition controller for controlling a state transition of the own control system based on a signal output from the error detection unit, an error detection result signal on the counterpart control system, and an activation request signal; A common area used as a path for storing and transmitting standing information and essential information; Controls the enable state of the output control unit by the output signal of the state transition control unit, and when the own control system is in an active state, arbitrates the duplex bus so as to manage only the common area in the own control system. And a redundancy control unit which arbitrates the duplex bus so as to manage all common areas in its own control system.

Description

Integrated Information Communication Network Device Control System with Dual Structure

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an integrated service digital network (ISDN) device control system, and more particularly, to an integrated information network device control system having a redundant structure.

The ISDN device control system is used to control communication between the upper processor and the ISDN device. In the past, an ISDN device control system was used with one ISDN device control system. However, due to the importance of the role of ISDN device control system (hereinafter referred to as control system), a method for maximizing the ability to cope with abnormal conditions in the control system was required.

Accordingly, an object of the present invention is to provide an ISDN device control system having a redundant structure in order to maximize the ability to cope with the occurrence of abnormal conditions on the ISDN device control system.

In order to achieve the above object, the apparatus according to the present invention is a multi-information network device control system having a redundancy structure for controlling communication between a higher-level processor and a multi-information network device, and the upper-level device is controlled through a bus shared with a counterpart control system. An output control unit for controlling the output so that a bus collision does not occur during data transmission with the level processor or device; An error detection unit for detecting an error on its own control system; A state transition controller for controlling a state transition of the own control system by outputting an activation request signal and an output control signal of the own control system according to a signal output from the error detector, an error detection result signal on the counterpart control system, and an activation request signal; A common area for storing the standing information and the essential information and transmitting data to the counterpart control system through a redundant bus connected between the control systems; Control signals are transmitted and received through the same function unit and the redundant control bus in the counterpart control system, and the enable state of the output control unit is controlled by the activation request signal and the output control signal outputted from the state transition controller, and the own control system is in an active state. And a redundancy control unit for arbitrating the duplex bus so as to manage only the common area in its own control system, and in the inactive state, a duplication control unit for arbitrating the duplex bus to manage both the common area in the other party's control system and the common area in its own control system.

1 is a block diagram of an integrated IT network device control system having a redundant structure according to the present invention.

FIG. 2 is a detailed view of the redundant control unit and the common area and the output control unit shown in FIG.

Explanation of symbols for main parts of the drawings

110: A side integrated service digital network (ISDN) device control system

120: B side ISDN device control system

111, 121: upper level processor interface

112. 118, 122, 128: output control unit

113, 123: redundancy control unit 114, 124: error detection unit

115, 125: state transition control unit 116, 126: common area

117, 127: device interface unit

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

1 is a block diagram of an ISDN device control system having a redundancy structure according to the present invention, which is composed of an ISDN device control system 110 on the A side and an ISDN device control system 120 on the B side of the same structure. 120 is connected to share a signal line between a higher processor and a device, not shown, so that synchronization can be maintained at all times.

The ISDN device control systems (hereinafter referred to as control systems 110 and 120) on the A side and B side are output control units 112 for controlling the outputs to prevent bus collisions with upper level processors (not shown), respectively. And a higher level processor interface unit 111 and 121 for interface processing between the upper level processor and the control system 110 and 120, which are not shown, and detects an error occurring in the own control system. Error detection units 114 and 124 and self-side error detection unit 114 or 124 for transmission to the control unit 115 or 125 and the relative state transition control unit 125 or 115 via mutually independent signal lines, and the opposite side. The error detection result signal transmitted from the error detection unit 124 or 114 and the activation request signal transmitted from the counterpart state transition control unit 125 or 115 through the redundant monitoring bus. The state transition control unit 115, 125 for outputting the activation request signal EN0 and the output control signal of the own side, and the control signal with the counterpart functional unit 123, 113 through the redundant control bus and manages the redundant bus. And a redundancy control unit 113 and 123 for controlling, a common area 116 and 126 having essential information and standing information and used as a path for transferring the provided information, and a bus collision upon output to devices not shown. An output control unit 118, 128 for controlling the output so that this does not occur, and a device interface unit 117, 127 for interface processing between the devices and the control system.

FIG. 2 illustrates in more detail the relationship between the redundancy control units 113 and 123, the common areas 116 and 126, and the output control units 112, 118, 122 and 128 in the redundancy structure configured as shown in FIG. 1.

Next, the operation of the control system having the redundant structure shown in FIG. 1 will be described with reference to FIG. 2.

Hereinafter, a case in which the A side control system 110 is set to an active state and the B side control system 120 is set to an inactive state will be described by way of example.

First, the error detection unit 114 detects whether an error has occurred in the own control system 110, and outputs the detection result FAULT0 to the state of the state transition control unit 115 and the counterpart control system 120 in the own control system 110. The transition control unit 125 transmits. At this time, since signal lines independent from the output signal of the error detection unit 124 of the counterpart control system 120 are used, they have independence of state transition when an error occurs, and impart activeness by hardware operation without external manipulation. The result of such an active operation may be used to inform the operator of an error occurrence state.

The state transition control unit 115 monitors the error detection result signal transmitted from the error detection unit 114 in the own control system 110 and the error detection result signal and redundancy monitoring transmitted from the error detection unit 124 in the counterpart control system 120. An activation request signal and an output enable signal for the own control system 110 are output by the activation request signal transmitted from the state transition controller 125 in the counterpart control system 120 applied through the bus. The output activation request signal and the output enable signal are transmitted to the redundancy control unit 113. Here, the state transition controller 115 is also configured to be driven by the solid line connection structure between the error detectors 114 and 124 and the counterpart state transition controller 125 without external selection or software adjustment to provide independence in operation.

The redundancy control unit 113 performs arbitration processing for the redundancy bus to transmit information stored in the common area 116, and as shown in FIG. 2, BUSY, R / W, OE and COMSEL (common area). A control signal such as a SELect) signal is transmitted and received to and from the counterpart redundant control unit 123 through the redundant control bus to control the redundant state. First, the redundancy control unit 113 uses the output enable signal applied from the state transition control unit 115 so that the upper processor interface signal line of the own control system 110 and the interface signal line of the device are the upper processor of the ready state control system 120. The output control signal OUT0 is output to the output control units 112 and 118 so as to prevent a collision between the interface signal line and the interface signal line of the device. In addition, since the current state is active, the redundancy control unit 113 performs arbitration processing for the redundancy bus so as to process information while managing only its common area 116. However, the redundant control unit 123 of the counterpart control system 120 board in a ready state performs arbitration processing for the redundant bus so as to perform information processing while managing the common area 126 and the common side 116 of its own side in common. That is, the data stored in the common area 116 has the standing information and the essential information. In the normal state, the redundancy control unit 113 manages only the standing information and the essential information in the common area 116, but the counterpart control system 120 The redundancy control unit 123 therein reads the standing information existing in the common area 116 into the common area 126 when the board of the control system 120 is mounted, synchronizes with the control system 110, and initializes the common area 116. Essential information existing in the system is read to common area to maintain mutual independence. In this way, the bus sharing method is applied to the redundant buses between the common areas 116 and 126 on both sides so that the common areas 116 and 126 can be managed by the control system 120 in an inactive state. In the case of using the common area approach, the control system 110 in the active state does not need to control the standing information and the essential information when switching, thereby maximizing the utilization of the limited transmission path.

The output controllers 112 and 118 are connected to the upper processor (not shown) and the devices (not shown) by the output enable control signal output from the state transition controller 115 output through the redundancy controller 113. The control is performed such that a collision of a signal line shared with the counterpart control system 120 does not occur during output.

On the other hand, when the control system 120 is in an active state and the control system 110 is in an inactive state, the operation is reversed as described above.

As described above, the ISDN device control system having the redundancy structure transmits the error detection signal to the counterpart using independent signal lines, thereby providing independence of state transition in the event of an error, It is possible to maximize utilization of the limited transmission path by using the common area approach to manage the standing information in the common area of the inactive state so that only the information other than the standing information is transferred.

In addition, there is an advantage to prevent the occurrence of bus collision by controlling the output during data transmission using a signal line shared by the redundant ISDN device control system to maintain synchronization with the host processor and devices.

Claims (5)

In the integrated information network device control system having a redundant structure to control communication between a higher level processor and the integrated information network devices, An output control unit for controlling an output such that a bus collision does not occur when data is transmitted to the upper level processor or the device through a bus shared with a counterpart control system; An error detection unit for detecting an error on its own control system; A state transition controller for controlling a state transition of the own control system by outputting an activation request signal and an output control signal of the own control system according to the signal output from the error detection unit, an error detection result signal on the counterpart control system, and an activation request signal; A common area for storing the standing information and the essential information and transmitting data to the counterpart control system through a redundant bus connected between the control systems; The control unit transmits and receives a control signal through the duplication control bus and the same function unit in the counterpart control system, and controls the enable state of the output control unit according to the activation request signal and the output control signal output from the state transition control unit. The redundancy control unit arbitrates the duplex bus to manage only the common area in its own control system when it is in an active state, and the redundancy control unit mediates the duplex bus so as to manage both the common area in the other party's control system and its common area when it is inactive. Comprehensive information communication network device control system having a redundant structure comprising a. 2. The integrated information communication network device control system having a redundant structure according to claim 1, wherein the error detection results on each control system are transmitted using signal lines that are independent of each other. The counterpart control unit according to claim 1, wherein when the control system is mounted in an inactive state, the redundant control unit reads the standing information stored in the common area in the counterpart control system, synchronizes the counterpart control system with the counterpart control system, and initializes the counterpart side. Integrated information communication network device control system having a redundancy structure, characterized by maintaining the independence of information by arbitration processing of the redundant bus so that the essential information stored in the common area in the control system is read into the common area in the control system on its own side. . 4. The integrated information communication network device control system having a redundant structure according to claim 3, wherein the redundant bus has a structure shared by the common areas in both control systems. The method of claim 1, wherein the output control unit is characterized in that each of the upper processor interface for performing the interface processing between the control system and the upper processor and the device interface for performing interface processing between the control system and the devices, characterized in that Integrated Information Communication Network Device Control System with Redundancy Structure.