KR960003974B1 - Data back-up method for electronic switching system - Google Patents

Abstract

a) transmitting a log needed to back up disc to an input/output processor(IOP); b) checking out communication states by storing the transmitted log in a log spool; c) transmitting the log to an operation and maintenance processor(OMP) for the case of normal communication states, storing the log in the log file of disc and waiting for abnormal communication states; d) making back-up processor load data(PLD) by storing the transmitted log in the log spool; e) checking out the communication state with a main system; f) checking a required processor in case that the communication is normal; g) loading PLD and applies PLD with non-applicable log in the log file of disc in case that the communication is abnormal; h) loading by applying non-applicable log with PLD; and i) making back-up PLD by transmitting rest log to OMP.

Description

Data Backup Method in Remote Access Switching Module of Electronic Switching System

1 is a distributed structure diagram of an electro-exchanger DMBS including the contents of the present invention,

2 is a structural diagram showing the flow and configuration of messages between related blocks for processing RASM data backup implemented on an electronic switching system;

3 is a flow chart showing the overall flow of the RASM data backup process of the present invention.

* Explanation of symbols for main parts of the drawings

1: Electronic changer main system 2: RASM

3: ASS (Access Switching Subsystem)

4: INS (Interconnection Network Subsystem)

5: Central Control Subsystem (CCS)

7: IOP (Input Output Processor)

8, 9 to 9n: Access Switching Processor (ASP)

10: INP (Interconnection Network Processor) and NTP (Number Translation Processor)

11: MMP (Man Machine Processor)

12: OMP (Operation and Maintenance Processor)

The present invention relates to a remote access switching module (RASM) data backup method in an electronic switchboard DBMS (Data Base Management System).

Existing exchange system, regardless of the number of subscribers, the exchange system main system is installed in the place where the number of subscribers is small and it is very inefficient from the economic side. I needed to. However, in the electronic switchboard DBMS, which must ensure that the data of the exchange is maintained correctly, there is no way to guarantee data consistency between the main system and the RASM by using the conventional backup method, and thus it is possible to operate the exchange as error data. The RASM, which is an exchange system for farming and fishing villages, usually handles calls by communicating with the main system of the electronic switchgear, and when the communication with the main system is not possible, the call is handled within the RASM itself. It is necessary to keep the related data in both main system and RASM when performing call processing and operation preservation processing. Will occur If you continue to operate the switching state there is a problem that inflict an enormous impact on the exchange have to stop the whole exchanger systems services.

Therefore, the present invention devised to solve the above problems, by implementing a unique RASM data backup function in the DBMS of the electronic switchgear to ensure the data consistency between the main system and the RASM to always operate the exchange with the correct data The purpose is to provide a method of backing up RASM data that eliminates the effects on the exchange due to mismatches.

In order to achieve the above object, the present invention provides an Access Switching Subsystem (ASS) having an Access Switching Processor (ASP) 9, .. 9n, and an INS having an Interconnection Nework Processor (INP) Number Translation Processor (NTP). A main system (1) having three subsystems (Interconnection Network Subsystem), a Central Control Subsystem (CCS) having an Operation and Maintenance Processor (OMP) and a Man Machine Processor (OMP), and an Input Output Processor (IOP). 10. A data backup method applied to an electronic switch having a Renite Access Switching Module (RASM) 2 having an Access Switching Processor (ASP); When a change request is received, the IOP 7 receives a change request for a backup relation from an application program and transmits a log required for disk backup to the IOP. After performing the first step, the IOP 7 logs the received log. Stored in the spool, the backup processor performs a backup to the corresponding processor load data (PLD) and checks whether the communication is normal. After performing the second step, if communication with the main system is normal, the log is directly logged to the OMP. In case of normal operation, if the communication with the main system returns to normal, after transmitting the log to the OMP, after performing the third step, the OMP logs the received log. The fourth step of storing in the spool and backing up to the corresponding PLD through the backup process, and when the system restart request comes in, the main domain is restarted. A fifth step of checking whether communication with the system is normal; after the fifth step is performed, if the communication is normal, a sixth step of identifying a processor requesting the loading; after performing the fifth step, if the communication is not normal The ASP immediately loads and terminates the PLD, and the IOP first loads the PLD and then applies and terminates the PLD to which the log is not applied in the log file of the disk. After the eighth step and the eighth step to apply the log that has not been applied in the log spool of the OMP to the PLD, and after performing the eighth step, the ASP of the RASM log of the IOP disk before loading the PLD from the OMP If the log is not applied to the file remains in the ninth step to transfer the log to the OMP to back up the PLD to receive the load.

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

1 is a structural diagram of a main memory DBMS having a distributed structure of an all-electronic exchange system to which the present invention is applied.

As shown in the figure, the electronic switchboard is composed of a main system (1) and a RASM (2). The main system includes an Access Switching Subsystem (ASS) (3), an Interaction Network Susystem (INS) (4), and a CCS ( Central Contral Subsystem) It consists of three subsystems (5).

Ass (1) is composed of Access Switching Processors (ASPs) 9, .. 9n performing distributed call processing functions, and INS 4 is an INP (Interconnection Network Processor) performing centralized call processing functions. ) And the Number Translation Processor (NTP) (10), and the CCS (5) performs centralization functions related to operation and maintenance, and the Operation and Maintenance Processor (OMP) (12) and the Man Machine Processor (MMP) (11). It is composed. In addition, RASM is composed of IOP (Input Output Processor) 7 and ASP (8) and performs the operation maintenance and call processing functions.

Electronic switchboard DBMS has functions distributed according to the characteristics of the processor to manage the data distributed among the above processors and resides in main memory for real time processing, and retrieves, changes, adds and deletes data. It provides functions, data consistency guarantee of redundant relations, data backup function, data recovery function, data security function, and concurrency control functions.

Of the above processors, the DBMSs of OMP 12 and IOP 7 are based on Data Base Backup Group (DBBG), Data Base Supporting Group (DBSG), Data Base Transaction Group (DBTG), and Data Base Kernel Gruop (DBKG). It consists of four blocks and the other processors, except for the MMP 11, consist of three blocks: DBBG, DBSG, and DBTG.

On the other hand, the DBMS of the MMP 11 is composed of four blocks, DBQG (Data Base Query Group), DBSG, DBTG, DBKG, unlike other processors. The reason is that only the MMP 11 can receive input from the operator, which causes the DBQG block that interfaces between the operator terminal and the electronic switching system cannot exist in other processors but exists only in the MMP 11.

Looking at the function of each block of DBMS, DBMS performs user matching function and DBMS communication function, DBMS performs backup and recovery function and duplicate data processing function. DBTG performs transaction management, DBKG actually searches, alters, inserts, and deletes databases. Finally, DBQG performs on-line query processing.

2 is a structural diagram showing a flow of configuration messages between related blocks for detracting from the RASM data backup implemented on the electronic switching system to which the present invention is applied.

DBSG is a block that creates a log (change data) and sends DBBG only to relations that need to be backed up to disk when a data change request is received from an application.

DBBG of IOP (7) receives log from DBSG, and then saves the log to IOP (7) 's log spool (change data storage) and backup to corresponding PLD (Processor Load Data) through backup process which is one of DBBG's processes. At the same time, if communication with the main system is made, the log is sent to the DBBG of the main system. If communication is not possible, the log is stored in a log file on disk. When the communication is normal, the log file log is sent to the DBBG. It's a block. On the other hand, the DBBG of the OMP 12 is a block for storing the log received from the DBBG of the IOP 7 in the log split of the OMP 12 to be backed up to the corresponding PLD through a backup process which is one of the processes of the DBBG.

Also, if the communication with the main system is normal at system restart, the DBBG of the OMP 12 transfers the logs from the DBBG of the IOP 7 into the log file of the RASM so that the PLD is loaded after backing up the logs to the corresponding PLD. If the communication with the main system is not normal, the DBBG of the IOP (7) is applied to the PLD which is already loaded, and the log is applied in the log file to disk. DBKG is a block that receives a change request from an application program and actually performs data changes to the PLD in memory.

3 is a general flow diagram of the RASM data backup process implemented on the present invention.

The RASM data backup process receives a change request for a back relation from an application (31), changes the data in the PLD of memory (32), and then creates a log necessary for the disk backup in the DSBG (33). Send to DBBG (34)

When the DBBG of the IOP 7 stores the received log in the log spool (35, 36), the backup processor performs a backup to the corresponding PLD based on the log (37). Then, if communication with the main system is normal (38), the log is directly transmitted to the DBBG of the OMP 12 (39), otherwise, the log is stored in a log file on the disk (43), and then with the main system 1 When communication returns to normal (44), the log in the log file is transmitted to the DBBG of the OMP 12 (45). The DBBG of the OMP 12 stores the received log (39) in the log spool (40) to be backed up to the corresponding PLD through the backup process (41, 42).

On the other hand, upon restarting the system (46), it is checked whether the communication with the main system (1) is normal (47). If the communication is normal, the IOP (7) logs the unapplied log from the log spool of the OMP (12). After applying (53) to the PLD (54) to be loaded (54), the ASP (8) of the RASM (2) remains unapplied logs in the log file on the IOP (7) disk before loading the PLD from the OMP (12). If present, log 55 is received from DBBG of IOP 7 (56) and the log is backed up (57) to the PLD (58) for loading (58).

When the communication with the main system 1 is abnormal in the survey 47, the ASP 8 immediately loads and terminates the PLD (49) and the IOP 7 (48) first receives the PLD (50). The log, which is not applied in the log file of the disk, is applied to the loaded PLD and terminates (51).

The present invention configured as described above operates in the electro-electric exchanger and can obtain the following effects. First, operating an exchange with error data that may be caused by data inconsistency between the main system and the RASM adversely affects the exchange, causing enormous damage to the exchange, so that the exchange always operates with the correct exchange data through the present invention. This can prevent significant damage to the exchange. Second, even if the exchange system restarts due to a system failure, the database of the RASM and the main system is ensured to be consistent so that the exchange can be operated in the same state as before the system failure occurred. .

Claims (5)

Access Switching Subsystem (ASS) with Access Switching Processor (ASP) (9, .. 9n) and Interconnection Network Subsystem (INS) with Interconnection Nework Processor (INP) Number Translation Processor (NPT) 10 (4) and a main system having three subsystems: a Central Control Subsystem (CCS) 5 having an Operation and Maintenance Processor (OMP) 12 and a Man Machine Processor (MMP) 11. And a data backup method applied to an electronic switch having a remote access switching module (RASM) 2 having an input output processor (IOP) 7 and an access switching processor (ASP) 8; When the change request comes in, after receiving the change request for the backup relation from the application program and transmitting the log necessary for the disk backup to the IOP, after performing the first step (31 to 34), the first step (31 to 34), The IOP 7 stores the received log in the log spool, and the second process (35 to 38) and the second step of performing the backup processor to backup the corresponding PLD (Processor Load Data) and check whether the communication is normal. After that, if the communication with the main system 1 is normal, the log is directly transmitted to the OMP 12. If the communication with the main system 1 returns to normal, the OMP 12 is directly stored. After performing the third step (39, 43 to 45) and the third step (39, 43 to 45) of transmitting the log to (12), the OMP 12 stores the received log in the log spool to perform the backup process. To back up and shut down the PLD A fourth step (40 to 42), and a fifth step (46, 47) of checking whether communication with the main system (1) is normal when the system is restarted when a system restart request comes in; the fifth step (46, 47) After performing step 6), if the communication is normal, after the sixth step 52 for identifying the processor requesting the loading and the fifth step 46 and 47, if the communication is not normal, the ASP 8 immediately executes the PLD. After performing the seventh step (48 to 51) and the sixth step 52 to apply to the loaded PLD and terminates, the IOP (7) is the log in the log spool of the OMP (12) is not applied already to the PLD After performing the eighth step 53, 54 and the eighth step 53, 54 to apply and load, the ASP 8 of the RASM 2 transmits the PLD from the OMP 12 to the PLD. Remote access switching module of the electronic switchboard, characterized in that the ninth step (55 to 58) to receive the load after the backup Data backup method of the document. The method of claim 1, wherein the first steps (31 to 34) are performed; The RASM data backup process receives a change request for a backup relation from an application and performs a first process (31, 32) of changing data in a PLD of a memory, and after performing the first process (31, 32), for disk backup. And a second process (33, 34) of producing necessary logs and transmitting them to the IOP (7). The method of claim 1, wherein the second steps (35 to 38) are performed; The IOP 7 performs a first process (35, 36) for storing the received log in the log spool, and after performing the first process (35, 36), the backup process is based on the log stored in the log spool And a second step (36, 37) of performing a backup to the PLD and checking whether the communication is in a normal state. The method of claim 1, wherein the third step (39, 43 to 45) is; First step 39 of directly transmitting a log to the OMP 12 when the communication with the main system 1 is normal, and if the communication with the main system 1 is not normal, the log is written to a log file of the disk. Storing and waiting for communication with the main system 1 to return to normal, and after performing the second process 43, 44, if the communication returns to normal, the OMP 12 And a third step (45) of transmitting the log in the log file. The method of claim 1, wherein the fourth step (40 to 42) is; The OMP 12 stores a received log in a log spool, a first process 40, and after performing the first process 40, a second process 41, 42 for backing up to a corresponding PLD through a backup process. A data backup method in a remote access switching module of an all-electronic exchange.