KR0130418B1 - Method for auto-self diagnosis and decovery of dual common bus resource and processor in the full electronic switching system - Google Patents

Abstract

The self diagnosis and recovery method for doubling common bus resource and processor of a full electronic exchanger comprises: an initial state self diagnosis and recovery step(101-106) in which a self diagnosis test is executed for memory, data line and message input/output hardware by test set modes at an initial step, and if the test result is abnormal, the information of an error generation position is outputted to automatically recover the error state; a loading state self diagnosis and recovery step(110-125) in which self diagnosis test and recovery are executed for occupation possibility for doubled bus resource at the load state and as to whether the occupied bus is normal and is transferred to a normal loading state; and an one-line state self diagnosis and recovery step(130-148) in which self diagnosis test and recovery are executed for serious error generation during one-line program process at the one-line state, a normal operation of a periodic bus, a transmitting/receiving path of processor doubling information, and a periodical bus deviation.

Description

Self-diagnosis and recovery method of redundant common bus resources and processors in electronic switching

1 is a configuration diagram of hardware of a conventional redundant common bus resource.

2 is a block diagram of hardware to which the present invention is applied.

3 is a flowchart of a self-diagnosis and recovery method of an initial state according to the present invention.

4 is a flowchart of a self-diagnosis and recovery method of a loading state according to the present invention.

5 is a flowchart of a method for self-diagnosis and recovery in an online state according to the present invention.

* Explanation of symbols for main parts of the drawings

1: CIN 2,2-1,2-2: Bus

3: processor 4: redundancy path

The present invention relates to a redundant common bus resource of an electronic switching system and a method for self-diagnosis and recovery of a processor. In particular, a common bus resource accommodated in a sub-system divided into functional units in a large-scale distributed processing electronic switching system is used. In order to ensure the reliability of hardware hardware and usage data in the redundant processors, each stage of self-diagnosis is performed from the initial state to the on-line state transition and the automatic recovery is performed to minimize the manual error recovery by the operator, Self-diagnostic and recovery methods for redundant common bus resources and processors to provide accurate information on how to take appropriate action.

Conventionally, as shown in FIG. 1, a control interworking network (CIN) 1, which performs a function of distributing communication data for communication with another processor mounted in an electronic switching system, and transmit / receive other processors A bus (2) consisting of only one path as a physical transmit / receive path, a plurality of redundant processors (3) and a plurality of redundant processors (3) connected to the bus (2) and capable of performing transmit and receive operations without restriction. It consists of a redundant path (4), which is an information transfer path therebetween.

As described above, the conventional processor 3 itself is redundant, but there is a problem in that the path for transmitting and receiving communication data is not configured with duplication and thus cannot perform an operation for recovering when an abnormal state of the path occurs. In addition, because the hardware is not tested beforehand before use, it is used without the test with the reliability problem of the processor's hardware resources. Therefore, the processor itself cannot transition from abnormal state to normal state, Due to the lack of reporting, hardware maintenance took considerable time.

Therefore, an object of the present invention is to perform a pre-use self-test on the hardware resources used by a particular processor to ensure the reliability of the software using the hardware and to accurately determine the location of the abnormal state in the redundant hardware. The present invention provides a method for self-diagnosis and recovery of a redundant common bus resource and a processor of an electronic switch to provide an operator for easy maintenance.

In order to achieve the above object, a self-diagnostic and recovery method of a redundant common bus resource and a processor of an electronic switch according to the present invention performs a self-diagnostic test for memory, data lines, and message input / output hardware for each test setting mode in an initial state. An initial state self-diagnosis and recovery step of automatically recovering information by outputting information on an error occurrence position in case of abnormality; After performing the initial state self-diagnosis and recovery steps, the self-testing and retrieval of self-diagnostic test and recovery of the occupied potential of the duplicated bus resources in the loaded state, whether the occupied bus is normal, and whether the transition to the normal loading state is possible is possible. Diagnosis and recovery, and after the loading status self-diagnosis and recovery, the fatal error occurs during the online program execution, periodic bus normal operation, transmission and reception path of processor duplication information, and self-diagnosis for periodic bus failure On-line self-diagnosis and recovery steps are performed to perform testing and recovery.

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

2 is a hardware configuration to which the present invention is applied.

The hardware diagram consists of a CIN (1), a redundant bus (2-1) (2-2), a plurality of redundant processors (3) and a redundant path (4).

In the above, the CIN (1) performs a function of distributing communication data for communication with other processors mounted in the electronic switching system, and interoperates for communication data processing for communication between processors and wants communication. The main purpose is to distribute messages to, i.e., communication data.

The redundant buses (2-1) and (2-2) are redundant physical transmit / receive paths for transmitting / receiving to and from other processors in a plurality of processors, so that a plurality of processors can operate in the same bus resource share. It is a hardware bus for operating in redundancy to ensure reliability.

The processor 3 is a processor which is connected to the buses 2-1 and 2-2 and is capable of transmitting and receiving communication data using common bus resources 2-1 and 2-2. By selecting the bus resources in the normal state, the communication data is transmitted and received, and the processor itself is redundantly configured to increase the importance and reliability of the processor.

The duplication path 4 is for physically duplication of information between physically duplicated processors used for the purpose of the initial duplication setup of the processor 3, post-configuration duplication information transfer, and emergency information transfer such as processor abnormal state information.

A self-diagnostic and recovery method of a redundant common bus resource and a processor according to the present invention applied to the hardware configured as described above will be described in detail with reference to FIGS. 3, 4, and 5.

The redundant common bus resource and recovery method according to the present invention includes an initial self-diagnosis and recovery step for determining whether the basic hardware is normally operating in an initial state, and a loading step for program loading, which is an intermediate step for the on-line state transition. Self-diagnosis and recovery of loading status for the diagnosis of normal bus status and reliability of data, and the inspection of redundant transmission / reception paths for periodic inspection of redundant buses and the exchange of redundancy information after on-line status transition. Online self-diagnosis and recovery steps are taken to take appropriate action.

First, the initialization step 100 for initializing the usage data and error processing and proceeding to the initial state self-diagnosis and recovery steps is performed.

Initial status self-diagnosis and recovery phase that performs self-diagnosis test of memory, data line and message input / output hardware for each test setting mode in the initial state after initializing step, and automatically recovers by outputting information on the error location in case of abnormality. 101) 102. First, the mounting memory is diagnosed by using a specific bit pattern of 1,2,4 byte unit. If the mounting memory is abnormal, it outputs information on the location of the error and proceeds to the initialization step and retrys. Memory normal diagnosis and recovery steps 101 and 102 are performed. In other words, by writing and reading specific bit patterns in units of 1, 2, and 4 bytes to the mounting memory to test and diagnose whether the contents match, to diagnose the normality (101). Information, that is, a content compared with an address in which an error occurs, is output, and the process proceeds to the initialization step 100 to retry 102 from the beginning for recovery.

Results of performing the normal diagnosis and recovery steps of the mounting memory If the mounting memory is normal, it diagnoses whether the data line is normal. If the error is abnormal, outputs the position of the data line where the error occurred, and proceeds to the initialization step 100 to retry the data line normal diagnosis. And recovery steps 103 and 104. That is, when the mounting memory is normal, all data lines used are diagnosed (103) to output the position of the data line generated when it is determined to be abnormal and proceed to the initialization step 100 to retry from the beginning for recovery. (104).

As a result of performing data line normal diagnosis and recovery step, if the data line is normal, the message I / O hardware is diagnosed as normal and if it is normal, it proceeds to the self-diagnosis and recovery state of loading status. If abnormal, it outputs an error message and proceeds to the initialization step 100. The message input / output hardware normal diagnosis and recovery step 105 and 106 perform the retry. That is, when the data line is normal, it diagnoses whether the message input / output is normal. In case of the abnormal state by comparing the transmitted data with the received data, it is diagnosed 105 in the mode of directly connecting the message transmission to the receiving. After that, the process proceeds to the initialization step 100 and retry 106 from the beginning for recovery.

Also, if the message I / O is normal, the basic hardware diagnosis is completed, and after the initial self-diagnosis and recovery phase, the occupancy of the redundant bus resources in the loaded state, the existence of the occupied bus is normal, and the normal loading state. Loading state self-diagnosis and recovery steps 110-125 that perform self-diagnostic testing and recovery of transitions are performed, which will be described with reference to FIG.

Diagnosing the likelihood of occupied duplicated bus resources and outputting a bus occupied error message if there is no occupied bus and proceeding to initialization step 100 to diagnose and recover the occupied potential of duplicated bus resources (110). (111) (114). That is, if there is an occupiable bus (A) (B) among the duplicated bus resources (110) and (111), if there is no occupied bus, the bus occupancy error message is output and the process proceeds to the initialization step (100). Retry 114 from scratch for the first time.

Diagnosis and Recovery of Possibility of Redundant Bus Resources When the occupied bus exists, the occupied bus is occupied and the normal operation of the occupied bus is diagnosed. Steps 112, 113, 115, 116, 117, and 118 to check for and recover the presence of occupied buses, if they are tested and repaired, and if there is a problem with both redundant bus support, then proceed to the initialization phase and retry. ). That is, if there is an occupiable bus, the occupied bus 112 and 113 are occupied, and if the occupied bus is normally operated 115, it is switched to a redundant counterpart bus when it is determined to be abnormal. After the diagnosis of the normal operation of the bus 107, at this time, if it is determined to be abnormal, the duplex bus outputs a message that all are abnormal and proceeds to the initialization step 100 to retry 118 from the beginning.

If the occupied bus is normal, it performs the sending / receiving operation according to the defined protocol with the upper processor and diagnoses whether the transition to the normal loading state is possible and the loading is not normal. Transitioning to the normal loading state is performed by outputting a failure message and proceeding to the initialization step, and performing the diagnosis and recovery steps 119, 120, and 121. In other words, when the occupied bus is normal, the program load is requested to the upper processor (119), and after the prescribed transmission / reception matching with the upper processor, it is determined whether the transition to the normal loading state is possible (120). If it is not present, a loading failure message is output and the process proceeds to the initialization step 100 and retry 121 from the beginning for recovery.

Transition to Normal Loading State As a result of performing the diagnosis and recovery step, when transition to the normal loading state, that is, when transition to the normal loading state, the transition operation and the recovery operation by determining the agreement of the data agreement to ensure the reliability of the loading data. To secure the reliability of the loading data 122, 123, 124 and 125 are performed. That is, the sum of the received data is calculated in the address address to perform the loading data received from the upper processor until the end of the loading (122), and the sum of the data received from the upper processor and the calculated data is compared (123). do. If the result of the comparison is inconsistent, a data sum error message is output to perform an automatic recovery function to restore the reliability of the data, and the process proceeds to the initialization step and retry 124. In other words, in the normal loading state, the sum of all data received after writing to the address address to perform the loading data received from the upper processor is calculated (122), the sum of the data calculated by itself and the data received from the upper processor after the loading is completed. Compare the sums 123 and output a data sum error message if there is a mismatch, then proceed to the initialization step and retry 124 from the beginning for recovery.

In addition, when the sum of data is matched, the process transitions to the online execution process (125) and self-diagnosis for fatal error during periodic online program execution, periodic bus normal operation, transmission / reception path of processor duplication information, and periodic bus failure Online state self-diagnosis and recovery steps 130-148 that perform testing and recovery are performed, which will be described with reference to FIG.

First, when a fatal error occurs during the execution of an online program, a fatal error recovery step 130 (131) (131) is performed to classify an error code for error cause analysis, output a detailed error message based on the cause of the fatal error, and proceed to the initialization step and retry. ). That is, in the loading state, when the initial execution after the program loading is completed, a diagnosis of a fatal error in the online program occurs 130. If an error occurs, the error code is classified, the cause is output, and the initialization step 100 is performed for recovery. Retry 131 from the beginning.

If a fatal error does not occur during the execution of the online program, the normal operation diagnosis step 132 of the periodic bus for diagnosing the normal operation of the periodic bus is performed.

As a result of performing periodic operation diagnosis steps of the periodic bus, abnormal bus operation recovery steps 133, 134, 135, 136 and 137 which perform a recovery process for bus switching and abnormal state recovery in case of abnormal operation are performed. That is, as a result of performing the normal operation diagnosis step of the periodic bus, it is diagnosed whether abnormal abnormal operation is performed beyond the threshold value when abnormal operation is performed, and when continuous abnormal operation is performed above the threshold value, switching to redundant redundant bus resources 133 and 134 is performed. In operation 135, a normal operation test of the occupied bus is performed. If the bus occupied is abnormal, the bus error status message is output and the online program is re-executed (136) (137). If the bus occupied is normal, the normal operation of the periodic bus is diagnosed. Proceed to 132).

Diagnosis of the transmission and reception path of the processor duplication information in the normal operation as a result of performing the normal operation diagnostic step of the periodic bus.In case of abnormality, the transmission and reception path diagnosis and recovery step (138) (139) outputs information on the abnormal state and performs a recovery process. (140) (141) (142). That is, it is checked whether the processor is configured for duplication (138), and if the result of the test is to diagnose the transmit / receive path when the processor is configured for duplication (139). The transmission / reception path error message is output and the online program is re-executed (141) (142).

If the test result shows that the processor is not in a redundant configuration or if the transmit / receive path diagnosis is normal, that is, if the transmit / receive path is normal, it diagnoses the periodic bus hernia and outputs a message corresponding to the cause when the bus hernia is in a state and performs the recovery process. Bus hernia diagnosis and repair steps 143, 144, 145, 146, 147 and 148 are performed. That is, if the bus bus is diagnosed (143) to examine whether or not the periodic bus hernia, the non-occupied redundant bus resources are tested (144). If the non-occupied redundant bus resources are normal, the bus is transferred (147). Test normal operation (148). In addition, when the test result of the non-occupied redundant bus resource is abnormal or the occupied bus is abnormal operation, the bus abnormal message is output and the online program is re-executed (145, 146). In addition, when the bus normal operation test result is normal, the self-diagnosis and recovery of the redundant common bus resources and the processor are terminated.

As described above, the present invention provides easy diagnosis on the location of the failure by providing diagnosis of the basic hardware, failure history output and automatic recovery in case of abnormal state, and diagnosis of duplicated resources and failure history output and automatic recovery in case of abnormal state. Access time is saved, maintenance time is saved, operator's manual recovery is excluded, and work efficiency is increased and redundant resources are efficiently managed. The reliability can be improved, and when the problem occurs in the matching of software and hardware, it is possible to easily determine the problem part.

Claims (10)

Initial status self-diagnosis and recovery steps (101-106) that perform self-diagnostic tests on memory, data lines, and message I / O hardware for each test set-up mode in the initial state and output information on the error occurrence location in case of abnormality. Wow; After performing the initial state self-diagnosis and recovery steps, the self-testing and retrieval of self-diagnostic test and recovery of the occupied potential of the duplicated bus resources in the loaded state, whether the occupied bus is normal, and whether the transition to the normal loading state is possible is possible. Diagnostic and repair steps 110-125; After performing the loading self-diagnosis and recovery steps, a fatal error occurs during online program execution, periodic bus normal operation, transmission / reception path of processor duplication information, and self-diagnostic test and recovery for periodic bus failure. Self-diagnosis and recovery method of redundant common bus resources and processors in an electronic switch having on-line self-diagnosis and recovery steps (130-148). The method of claim 1, further comprising an initialization step (100) for initializing usage data and error processing and proceeding to the initial state self-diagnosis and recovery step. . The method of claim 2, wherein the initial self-diagnosis and recovery step comprises: diagnosing whether the mounting memory is normal by using a specific bit pattern, and outputting information on a location where an error occurs when the mounting memory is abnormal. The diagnostic memory normal diagnosis and recovery step 101 and 102 which proceeds and retryes, and when the mounting memory normal diagnosis and recovery step is performed, diagnoses the normality of the data line when the mounting memory is normal. The data line normal diagnosis and recovery step 103 and 104 for outputting the position of the line and proceeding to the initialization step and retrying, and if the data line is normal as a result of performing the data line normal diagnosis and recovery step, the message input / output hardware is normal. If it is normal to diagnose whether the loading state self-diagnosis and recovery proceeds, If it is normal, outputs the error message and the message input and output hardware normal diagnosis and self-diagnosis and repair method of the recovery stage 105, 106 around the electronic switching redundant common bus, and processor resources made of a retry process proceeds to the initialization step. The method of claim 3, wherein the normal diagnosis and recovery of the mounting memory comprises writing and reading specific bit patterns in units of 1, 2, and 4 bytes to the mounting memory to diagnose whether the mounting memory is normal, and information on a location where an error occurs when the mounting memory is abnormal. The self-diagnostic and recovery method of the redundant common bus resources and the processor of the electronic switchboard, which is configured to output the data and proceed to the initialization step. The method of claim 1, wherein the self-diagnosis and recovery of the loading state comprises: diagnosing the possibility of occupancy of a duplicated bus resource, if a bus that is occupied is not present, a bus occupancy error message is issued, and the process proceeds to the initialization step and retries. Diagnosis and recovery of occupied potential of redundant bus resources (110, 111, 114) and the occupied bus occupied and occupied when the occupied bus exists as a result of performing the diagnosability and restoration of occupancy of the redundant bus resources Diagnosis and recovery of the occupied bus, which is performed by diagnosing the normality of one bus and testing and recovering the transfer to the redundant bus and the existence of the transferred resources, and proceeding to the initialization stage when an abnormal condition occurs. 112, 113, 115, 116, 117 and 118, and the bus occupied as a result of performing the diagnosis and recovery steps In case of normal, it performs transmission / reception operation with the defined protocol with the upper processor and diagnoses whether the transition to the normal loading state is possible, if it is not normal, outputs a loading failure message and proceeds to the initialization step and reloads the normal loading state. In the case of a normal loading state as a result of performing the transition and diagnosis and recovery steps 119, 120 and 121 of the transition possible to the normal loading state and the normal loading state, whether or not the data agreement is agreed to ensure the reliability of the loading data. Self-diagnosis and recovery method of the redundant common bus resources of the electronic switchboard and the processor performed by the steps 122, 123, 124, and 125 to ensure reliability of the loading data to determine the transition operation and the recovery operation. . The method of claim 5, wherein the securing of the reliability of the loading data comprises: calculating a sum of the received data by writing to an address address where the loading data received from the upper processor is to be executed until the end of the loading; Comparing the sum of the received data with the sum of the calculated data (123); and if the result of the comparison does not match, outputs a data sum error message to perform an automatic recovery function to restore the reliability of the data, and proceeds to the initialization step. And retrying (124) and, if the comparison result is matched, proceeding to the on-line self-diagnosis and recovery step (125). According to claim 1, The self-diagnostic and recovery of the online state, if a fatal error occurs during the execution of the online program, classifies the error code for error cause analysis to output a detailed error message due to the cause of the fatal error and the initialization step Fatal error recovery steps 130 and 131 for retrying, normal operation diagnosis step 132 for diagnosing the normal operation of the periodic bus if a fatal error does not occur during online program execution, and the period As a result of performing a normal operation diagnosis step of a normal bus, an abnormal bus operation recovery step (133) (134) (135) (136) (137) performing a recovery process for bus switching and abnormal state recovery in case of abnormal operation, and the periodic Diagnosis result of normal operation of the bus. Transmitting / receiving path diagnosis and recovery steps 138, 139, 140, 141 and 142 outputting information on a rainy state and performing a recovery process; In the case of abnormal bus hernia diagnosis, a bus hernia diagnosis and recovery step (143) (144) (145) (146) (147) (148) outputs a message corresponding to the cause of abnormality and performs a recovery process. Self-diagnostic and recovery method of the redundant common bus resources and processors in the electronic switch having a. The redundant bus operation of claim 7, wherein the restoring of the abnormal bus operation is performed by diagnosing whether the abnormal bus operation is over the limit value when the abnormal bus operation is performed. A step (133) (134) of switching to a resource, a step (135) of performing a normal operation test of the occupied bus, and a bus abnormal status message if the occupied bus is abnormal, and outputting an online program Performing a step (136) (137), and if the bus occupied is normal, proceeding to diagnose a normal operation of the periodic bus; Self diagnosis and recovery method. 8. The method of claim 7, wherein the step of diagnosing and recovering the transmit / receive path includes: checking whether the processor is configured for duplication (138), diagnosing the transmit / receive path when the processor is configured for duplication (139); If the abnormality in the path diagnosis results in abnormal abnormal operation exceeding the threshold value, outputting the redundant information transmission / reception path error message and performing online program re-execution (140, 141) and 142, and the test result processor is a redundant configuration If not, or if the transmission and reception path diagnosis is normal, and proceeding to the bus hernia diagnosis and recovery step comprising the self-diagnosis and recovery method of the redundant common bus resources and processor of the electronic switchboard. 8. The method of claim 7, wherein diagnosing and restoring the bus hernia comprises diagnosing a periodic bus hernia to test redundant bus resources that are not occupied in the case of bus hernia (143) (144) and non-occupying the test results. Performing bus switching when the redundant bus resources are normal and testing the bus normal operation (147) (148); and when the non-occupied redundant bus resources are abnormal or the bus is abnormal, A method of self-diagnosis and recovery of redundant common bus resources and processors in an electronic switch, comprising outputting and performing online program reruns (145, 146).