KR0131155B1 - Remote backup method for subscriber location information - Google Patents

Abstract

The present invention relates to a method of backing up subscriber information for recovering subscriber location information in a digital mobile communication system. The present invention relates to a mobile subscriber data (loaded into a memory of a location register by a data recovery procedure in case of a system failure). 205, the data access control structure 202, the subscriber location information relation 203, and the loading data backup count of the location register's memory to maintain the consistency of the data. Performs backup function using mobile subscriber database management function and disk management function with mobile subscriber initial loading data, and has real-time data processing function and data for main memory database by having consistency of changed data with initial loading data. Improved reliability when recovering from failure.

Description

Remote backup method of subscriber location information

1 is an overall hardware configuration to which the present invention is applied.

2 is a structural diagram of a main memory based subscriber location information database.

3 is a processing signal diagram of a backup method for data matching in a conventional database.

4 is a data backup contents and application structure.

5 is a process flow diagram according to the present invention.

Explanation of symbols on the main parts of the drawings

100: position register 101: operation / maintenance processor

102, 103: auxiliary memory device 201: directory / dictionary

202, 501: data access control structure 203, 502: subscriber location information relation

The present invention relates to a remote back-up method of subscriber location information for recovering subscriber location information when a failure occurs in a digital mobile communication system. In digital mobile communication network, subscriber location information is composed based on main memory database to enable real time processing.

The backup function for data recovery in the conventional exchange system was performed in the following manner.

The conventional method of backing up data in a disk-based database is to back up the data by the backup function of the database to match the data when there is a change of data.

In this case, the backup function of the database should be operated in all cases where the data change occurs. In order to do this, the backup processing function must be performed in the operation / conservation processor configured as another processor in the switch configured as a distributed control system. Will increase.

Therefore, in the digital mobile communication system, the location register configured with the exchanger is equipped with a separate auxiliary memory device to satisfy the data real-time processing function and to reduce the processing load of the data. In order to match the data, the centralized management system, which is a centralized management system, is regenerated at regular time intervals so that the data can be recovered when the data is recovered.

In the present invention to achieve the above object will be described in detail based on the accompanying drawings.

First, FIG. 1 is an overall hardware configuration diagram to which a subscriber location information backup method of the present invention is applied.

The hardware configuration includes a processor 100 performing an interprocessor communication network and a location register function, an operation / preservation processor 101 for processing centralized data management, auxiliary storage devices 102 and 103, and auxiliary storage devices. It consists of a reference database 104 stored in.

In the present invention according to this configuration, when the subscriber location information database stored and managed in the auxiliary memory device 100 of the location register is damaged due to a system failure, the system loader and the processor loader first establish a communication network between the processors. By loading the reference database 104 stored in the auxiliary storage device of the operation / maintenance processor and using the data (105, 106) stored in the disk auxiliary storage device to restore the contents of the database to the state before the system failure occurred To provide.

In this case, since the reference database stored in the operation / preservation processor should always store the latest data, the backup operation of the data stored in the auxiliary memory device of the location register should be performed at regular intervals.

2 is a structural diagram of a subscriber location information database stored in the auxiliary memory of the first operation / maintenance processor and the main memory of the location register.

The database is divided into five parts as follows. There is a part of the database header 200 that contains information about the entire database and stores information about subscriber location information relations (normalized form flat file or table) 203 and other data relations 204. There is a directory / dictionary 201 section.

In addition, the actual subscriber location information includes a part of the data access control structure 202 for obtaining an index for designating a location where the subscriber location information is stored using the subscriber identification number and the subscriber location information relation 204 for storing the location information of the subscribers. It is composed of

Part of applying the subscriber location information backup function locally in the location register or performing a backup to an operation / conservation processor that recovers data is the data access control structure 202 and the subscriber location information relation 203.

3 is a flow chart of a backup of a database of an existing exchange. First, when a request for data change is made from the application 301 to the DB (database) support function 302, the change is performed by instructing the DB kernel function 303 to change the actual database to perform the change. The change log is sent to the DB backup function 304 that manages the consistency of the database so that the backup can be performed to maintain the consistency of the data at all times.

Whenever the backup function is performed in the main memory database, the load is applied to the operation / maintenance processor.

In order to reduce the load, the present invention was used in a remote data backup method using a separate auxiliary memory device.

4 is a structural diagram of a backup method for moving subscriber data of data to which a backup function is applied in the present invention.

The data stored in the auxiliary storage device by the data change of the location register are the data access control structure 401 and the subscriber location information relation 202. The two data are transferred to the operation / preservation processor in charge of managing the exchange. You need a backup of the stored database.

For this operation, the mobile subscriber data stored in the auxiliary memory device of the location register is copied to the auxiliary memory device 103 of the operation / conservation processor, and then functioned in the reference register (PLD) of the location register. This requires regeneration to initial data loaded by the system loader for each processor configured with a different processor.

5 is a flowchart of a process according to the present invention, which shows the flow of data backup procedure for data recovery in case of system failure. First, a data backup request 504 is made from the LR backup function 501 which manages the backup of the position register periodically at the time designated by the operator's command, to the LR recovery function 502 which manages the recovery time and state at the time of data recovery. .

In the LR recovery function that is requested to back up data, the database management function is used to first back up the subscriber database stored in memory to the auxiliary storage device.

After the backup, the disk management function requires a copy between the subscriber data disks.

The disk management function, which is requested to copy data between disks, copies the subscriber data from the location memory's auxiliary storage device to the storage and storage processor's auxiliary storage device and sends the LR backup function a copy completion signal.

The LR backup function receives the copy completion signal and regenerates the copied contents into loading data using the disk management function.

When regenerating, increase the backup count to check the backup status and refer to the data recovery.

As described above, in the present invention, since the pressurized paper location information is configured based on the main memory database, the recovery method of the subscriber location information is performed by the method of the existing system loader and the local data backup stored in the auxiliary memory device.

Therefore, in order to reduce the real-time processing and data processing load of data, the location register uses a separate auxiliary memory device to perform data backup function locally and operate according to the request of the operator or periodically to ensure data consistency. Data backup to the database for system loading stored in the maintenance processor is required.

Advantageous Effects of the Invention The present invention provides a method for reducing the system load and real-time processing of a database in a data backup method for efficient data recovery for a large main memory database.

Claims (4)

In the digital mobile communication system, a method of backing up data for a recovery method that maintains the consistency of data in case of system failure and makes the system stable. When restarting, in loading the main database into the main memory database, which is stored in the auxiliary storage device 103 of the operation / conservation processor for centrally managing the data of the system, the data backup processing time is shortened and the data is stored. Performing a backup function locally when data is changed using a separate auxiliary memory device 102 of a processor receiving data for real time processing (505), and initial loading data and data matching Periodically regenerating the local backup data into loading data for Subscriber location information backup method consisting of a backup confirmation count to confirm the backup reference point of the initial loading data to improve the reliability of the backup and recovery of the data. The location information backup method of claim 1, wherein the backup data is stored and managed according to a change of data by using a separate auxiliary memory device to perform a local backup function of the data. According to claim 1, In the data regeneration of the operation / maintenance processor, which is a reference database, always provides an optimal data service by copying the database at the time of data regeneration, first applying the backup contents of the data to the copy, the data after the backup operation is completed A location information backup method that enables data recovery by renaming a base. 4. The method of claim 3, wherein the data to be backed up to the reference database comprises a data access control structure (404) and a subscriber location information relation (405) that are backed up locally from the location register.