KR100200053B1 - Exchange duplexing controlling method - Google Patents

Abstract

The present invention relates to an apparatus and a method for controlling redundancy in a mobile communication exchange. The present invention relates to a hardware logic (redundancy control unit) for controlling failure processing and redundancy in hardware, and to a source and failure processing and duplication control for a generated failure. When the data is notified to the central processing unit, the central processing unit recognizes the processing state and the duplicated controlled state of the failure, and only the state management is performed, so that the efficient redundancy control is achieved.

Description

Redundancy Control Device and Method in Mobile Communication Switch

1 is a block diagram showing this redundancy control device in the present invention mobile communication exchange,

2a is a control flowchart for redundancy control when a failure interrupt occurs.

2b is a control flowchart for redundancy control when a fault interrupt occurs.

* Explanation of symbols for main parts of the drawings

1: Central processing unit 2: Failure state maintaining unit

3: central processing unit control unit 4: failure state release unit

5 control unit 6 central processing unit matching unit

7, 8: buffer 9: redundant control unit

The present invention relates to an apparatus and method for controlling redundancy in a mobile communication exchange. The present invention provides a redundancy (standby state, active state) after self-measurement of a system error caused by a failure in a dual structure of a link or bus type matching structure. The present invention relates to a redundancy control device and method in a mobile communication exchange for controlling the hardware and software.

In the conventional redundant control method, when a failure occurs in a dual structure of a link or bus type, the central processing unit is notified, and the central processing unit recognizes it and takes action on the failure and controls the redundancy. Such a method does not take immediate action when a failure occurs, and if a malfunction occurs in the central processing unit, a larger problem may occur.

The present invention is to solve the above problems, when a failure occurs in the link or bus, the hardware logic to handle the failure first in the hardware logic and to perform the redundancy control and then to the source and the failure processing and redundancy control for the failure When the data is notified to the central processing unit, the central processing unit recognizes the processing status and duplication-controlled status of the fault that occurred, and makes the state management to increase the efficiency of the system. To provide a control apparatus and method.

In order to achieve the above object, a redundancy control device in a mobile communication switch according to the present invention includes: a redundancy control unit for controlling redundancy and hardware redundancy for a generated failure; Two external buffers for receiving data on the fault source and transmitting the data to the central processing unit; It is characterized in that it consists of a central processing unit that controls the failure and the redundancy in software for the generated failure.

The redundancy control unit monitors whether or not a failure occurs and maintains the failure state as it is until the central processing unit reads the failure source: and recognizes the failure in the central processing unit and then controls it. A central processing unit control unit for holding a signal generated to A failure state canceling unit for clearing a failure source by applying a reset signal to a failure monitoring circuit (not shown) when recognizing a failure occurring in the central processing unit; A control unit for generating a redundancy selection signal by the redundancy control signal transmitted from the hardware and the central processing unit; And a central processing unit matching unit for transmitting the data input from the buffer to the central processing unit.

When described in detail with reference to the drawings as follows.

1 is a diagram illustrating a redundancy control device in a mobile communication switch according to the present invention, wherein the redundancy control unit 9 performs hardware failure processing and redundancy control for a generated failure, and includes a central processing unit 1 and a buffer 7. 8), the buffers 7 and 8 receive data on the failure source and transmit the data to the central processing unit 1, and the central processing unit 1 performs failure processing and redundancy control for the generated failure. This is done in software.

In the redundancy control unit 9, the fault state control unit 2 is connected to a fault monitoring circuit (not shown) to monitor whether or not a fault occurs, and remains unchanged until a failure source is read by the central processing unit 1 when a fault occurs. Keep it. The CPU 3 is connected to the CPU 1 and the controller 5 to recognize a failure in the CPU 1 and maintains a signal generated to control the failure.

The fault state canceling unit 4 is connected to the fault state maintaining unit 2 and recognizes a fault signal in the CPU 1 to apply a reset signal to a fault monitoring circuit (not shown) to provide a fault source. Clear it. The control unit 5 is connected to the central processing unit control unit 3 to generate a redundancy selection signal by the redundancy control signal transmitted from the hardware and the central processing unit, and the central processing unit matching unit 6 generates the central processing unit. The device 1 is connected to the control unit 5 and the buffers 7 and 8 to transmit data input from the buffers 7 and 8 to the central processing unit 1.

The operation of the configuration will be described in detail below.

When a fault is detected, the fault monitoring circuit detects this and inputs a link fault signal to the fault state maintaining unit 2 (hereinafter referred to as LINKF), and the fault state maintaining unit 2 interrupts the fault to the central processing unit 1. Transmit a signal (Fault Interrupt: hereinafter called FINT). Then, the controller 5 transmits the select signal PSEL of the step before controlling the failure processing and redundancy to the CPU matching unit 6. Then, the central processing unit 1 transmits the read signal FRD to the failure state maintaining unit 2 and the central processing unit matching unit 6 in order to recognize the source of the failure. Meanwhile, in the fault state maintaining unit 2, when the read signal FRD is input from the central processing unit 1, the controller 5 and the fault state release unit 4 are provided at the rising edge of the read signal FRD. It transmits a fault signal (Hardware Fault: hereinafter referred to as HWF). At this time, if the software change signal (Software Change: SWCHG hereinafter) is applied from the CPU 5, the control unit 5 takes hardware measures for the failure and performs redundancy control. Then, the control state of the failure processing and redundancy is transmitted to the two external buffers 7 and 8 and the CPU matching unit 6 using the select signal SEL. Then, the CPU matching unit 6 enables the two external buffers 7 and 8 according to the read signals FRD, SELRD, and PSELRD transmitted from the CPU 1, and the two external buffers ( 7, 8) receives the data on the failure source and outputs to the central processing unit matching unit (6). The CPU matching unit 6 includes data D [0 ... n]: SEL and PSEL for three read signals FRD, SELRD, and PSELRD applied from the CPU 1. Data) to the central processing unit 1. The fault state canceling unit 4 applies a reset signal LINKRST [1..n] to a fault monitoring circuit (not shown) in accordance with the HWF applied from the fault state maintaining unit 2, thereby providing data on the fault source. After clearing the system, monitor for the occurrence of another failure. The central processing unit 1 recognizes a state of failure processing and redundancy control according to data transmitted from the central processing unit matching unit 6, compares whether the state should be controlled by a failure processing algorithm, and manages state. The control signals FRD and WR are transmitted to the fault state maintaining unit 2, the central processing unit matching unit 6, and the central processing unit control unit 3. At this time, if the signal output from the central processing unit 1 is WR (when the state to be controlled by the failure processing algorithm is different from the above-described failure processing and duplex controlled state), the central processing unit controller 3 controls the central processing unit. The redundancy control signal is transmitted to the control unit 5 in accordance with the state management control signal WR transmitted in (1). The control unit 5 performs failure processing and redundancy control on the failure generated according to the control signal applied from the central processing unit control unit 3. On the other hand, if the signal output from the central processing unit 1 is FRD (if the state to be controlled by the failure processing algorithm is the same as the above-described failure processing and duplex controlled state), only state management for the failure is performed.

Tables 1 and 2 show that the central processing unit 1, the central processing unit matching unit 5, and the failure state glass unit according to the signal received from the central processing unit matching unit 6 are received. The control signal output to 2) is shown.

Table 1. Fault handling control signal when no fault interrupt occurs

In the above state of the SEL and PSEL, when the fault interrupt signal is not generated, the operator (central processing unit) transmits the SELRD signal and the PSELRD signal to the central processing unit matching unit 6, and the central processing unit matching unit 6 The state of the PSEL and SEL signal to be transmitted, and the CPU control shows the write signal transmitted from the central processing unit 1 to the central processing unit control unit 3 according to the state of the PSEL and SEL signal.

The state of the redundancy control signal SWCHG transmitted to the control unit 5 is determined according to the state of the write signal, and the control unit 5 performs redundancy control according to the state of the redundancy control signal SWCHG.

Table 2. Fault handling control signal after fault interrupt

The states of SEL and PSEL of Table 2 are determined in the same manner as in Table 1, and the CUP measures in Table 2 are performed in the central processing unit 1, the fault state maintaining unit 2 and the central processing unit matching unit 6 And a state of a signal to be transmitted to the central processing unit controller 3.

In the above, the central processing unit 1 compares the state of the SEL before and after the occurrence of the occurrence of the fault interrupt signal, and if it is different, recognizes that the fault processing and redundancy control has been performed, and matches the state maintaining unit 2 with the CPU. The state management signal is transmitted to the unit 6, and if it is the same, a write signal is transmitted to the central processing unit control unit 3 to perform fault processing and redundancy control.

The above operation will be described using the control flow chart as follows. FIG. 2A is a diagram illustrating redundancy control when a failure interrupt has not occurred. The SEL signal applied from the control unit 5 to the CPU matching unit 6 is described. If the PSEL signal is high, it writes 0 to the corresponding link. If the SEL signal is high, it writes 1 to the corresponding link when the PSEL signal is low.

On the other hand, when the SEL signal state is low and the PSEL signal state is high, 1 is written to the corresponding link. When the SEL signal state is low and the PSEL signal state is low, 0 is written to the corresponding link to control redundancy.

2B is a diagram illustrating redundancy control when a fault interrupt occurs. It is determined whether the SEL signal state before the fault interrupt occurs is high. . If the determination result is high, it is determined whether the PSEL signal state after the failure interrupt is high. If the determination result is high, 0 is written to the corresponding link.

If the PSEL signal state after the fault interrupt occurs is low as a result of the determination, if the SEL signal state after the fault interrupt occurs is low, only the FRD is connected to the link regardless of the PSEL signal state after the fault interrupt occurs. Will occur.

If the determination result indicates that the SEL signal state before the failure interrupt is low, it is determined whether the SEL signal state after the failure interrupt is high. If the determination result is high, only FRD is generated on the link regardless of the PSEL signal state after the failure interrupt. do.

If the SEL signal state after the fault interrupt occurs is determined as the result of the determination, it is determined whether the PSEL signal state after the fault interrupt occurs is high, and if it is high, 1 is written to the corresponding link. It will write 0 to the link.

As described above, in the mobile communication switch according to the present invention, when a failure occurs in a link or bus type matching structure, the hardware logic takes measures for hardware failure and performs redundancy. After controlling and transmitting the data to the central processing unit, the central processing unit compares the data transmitted from the hardware logic with the stored data, and handles the fault again or controls redundancy, thereby improving the efficiency of the system. It can be done.

Claims (4)

A redundancy control unit which handles the failure of the generated failure, controls redundancy of the link in a standby state or an active state, and transmits the link; Two external buffers that receive data about a failure source, store the data for a while, and then transmit the data; Redundancy control device in a mobile communication switch, characterized in that the central processing unit for controlling the redundancy of the link using a control algorithm as well as managing the failure processing according to the source of the failure transmitted from the external buffer. The system of claim 1, wherein the redundancy control unit comprises: a failure state maintaining unit for monitoring the occurrence of a failure and maintaining the failure state until the failure source is read; A central processing unit controller for recognizing a failure in the central processing plant and maintaining a signal generated to control the failure; A fault state canceling unit for clearing a fault source by applying a reset signal to the fault monitoring circuit when the fault is recognized by the central processing unit; A controller for generating a redundancy selection signal by the redundancy control signal transmitted from the fault state canceling unit, the central processing unit control unit and the central processing unit; And a central processing unit matching unit for transmitting the data input from the buffer to the central processing unit. The redundancy control method according to the CPU request when a failure interrupt has not occurred comprises the steps of: determining whether the state of the SEL signal applied from the controller to the CPU matching unit is high; A second step of determining whether the PSEL signal state is high when the SEL signal is high in the first step; A third step of writing 0 on a corresponding link when the PSEL signal is high in the second step; A fourth step of writing a 1 on a corresponding link if the state of the PSEL signal is low as a result of the determination of the second step; A fifth step of determining whether the PSEL signal state is high when the SEL signal state is low, and writing 1 to a corresponding link when the state of the PSEL signal is high; And if the PSEL signal is low, operates in a sixth step of writing zero to a corresponding link. The redundancy control method when a fault interrupt occurs from the hardware logic to the central processing unit includes: a tenth step of determining whether the SEL signal state before the fault interrupt is generated is high; A twenty step of determining whether the SEL signal state after a fault interrupt is high when the determination result state of the tenth step is high; A thirtieth step of determining whether a PSEL signal state after a fault interrupt is high when the determination result state of the twentieth step is high; A 40th step of writing 0 to a corresponding link when the determination result state of the 30th step is high; A 50th step of writing a 1 to a corresponding link if the PSEL signal state after the failure interrupt is low as a result of the 30th determination; In operation 60, when the SEL signal state after the fault interrupt occurs is low, generating only the FRD on the link regardless of the PSEL signal state after the fault interrupt occurs; A sixty step of generating only a FRD on the link regardless of the PSEL signal state after a failure interrupt as a result of the determination in the tenth step; A 70th step of determining whether the SEL signal state after the fault interrupt is high when the SEL signal state before the fault interrupt is low as a result of the determination of the tenth step; In operation 80, if only the FRD is generated on the link regardless of the state of the PSEL signal after the failure interrupt occurs when the determination result of the operation 70 is high; In operation 70, if the SEL signal state after the fault interrupt occurs is low, determining whether the PSEL signal state after the fault interrupt occurs is high; And determining that the signal is low when the PSEL signal state is not high in operation 90 and operating in operation 100 that writes 0 to a corresponding link.