KR100328667B1 - Backup Method For Subscriber Information Of HLR System - Google Patents

Abstract

The present invention relates to a method of backing up subscriber information of a home location register (HLR) system. In particular, when the subscriber information is changed during operation of the HLR system, only the changed subscriber information can be backed up to an external backup system in real time. The present invention relates to a subscriber information backup method.

Conventionally, as backup load is only performed once a day due to the load and backup time, when the HLR system fails, the lost subscriber information has to be manually repaired to provide services in the backup system. There was a disadvantage, and this caused a lot of time wasted to provide the actual service.

The present invention backs up subscriber information changed during the operation of the HLR system to an external backup system in real time, so that even if a failure occurs in the HLR system, the service for the subscriber in real time in the backup system without a separate subscriber information recovery operation by the operator. At the same time, local redundancy of the HLR system is possible.

Description

Backup Method for Subscriber Information of HLR System

The present invention relates to a method of backing up subscriber information of a home location register (HLR) system. In particular, when the subscriber information is changed during operation of the HLR system, only the changed subscriber information can be backed up to an external backup system in real time. The present invention relates to a subscriber information backup method.

In general, the database used in the HLR system is implemented with a real-time main memory resident database that is different from the disk database in order to implement rapid access to the subscriber information and real-time data processing. Because all the stored contents are lost due to the cause of the problem, the system using the resident database can save the data to disk, a relatively stable secondary memory device with little influence on abnormal situation, in order to prevent the loss of data stored in the main memory in case of failure. You should back up.

The configuration of such a general HLR system includes a database management system 11, a database recovery process 12, and an auxiliary storage device 13, as shown in FIG.

The database management system 11 manages a database for all processing of data of an application process, and includes a main memory 11-1 and a query processor 11-2 therein. 1) stores subscriber information in blocks of a predetermined size, and the query processor 11-2 accesses the main memory 11-1 for a request for retrieval, insertion, deletion, and change of subscriber information by an application process. It converts into a command that can be used directly to search, insert, delete, and change the subscriber information.

The database recovery process 12 performs a backup function of storing the changed subscriber information in the auxiliary memory device 13 when the subscriber information stored in the unit of memory 11-1 in units of blocks is changed.

The auxiliary storage device 13 stores subscriber information backed up by the database recovery process 12 in the form of a file.

In the conventional HLR system configured as described above, the database recovery process 12 backs up data on subscriber information stored in the main memory 11-1 to the auxiliary memory device 13 to protect the data from power failure. When loading System Loading Data, which is a basic data set of an externally produced database, into main memory 11-1, it is divided into blocks of a certain size, and a flag is set for each block so that a part of the block exists. When the data is changed, the flag of the block is set to indicate that the block is to be backed up to the auxiliary memory device 13.

At this time, the database recovery process 12 retrieves the flag of each block and backs up the block whose data has been changed to the auxiliary memory device 13, and resets the flag of the block when the backup is completed.

However, the backup function in the HLR system as described above has a disadvantage in that it does not immediately deal with a failure or failure of the system itself, and thus could not provide long-term service to subscribers.

In order to compensate for this, conventionally, the subscriber information stored in the auxiliary memory device 13 of the HLR system in the form of a file is backed up to an external backup system through a file transfer protocol. Backing up to an external backup system increases the system load and requires a long backup time, so that backup work to the backup system is performed at least once a day, such as at night.

In practice, however, if the HLR system fails, the operator can manually operate the subscriber information as there is no subscriber information from the time when the backup operation to the backup system to the time when the HLR system fails. The lost subscriber's information had to be restored to the backup system, which required a lot of time to actually provide the service to the subscribers using the backup system.

As described above, in the case of a failure of the HLR system as the backup operation is performed only once a day due to the load and backup time according to the backup operation, the lost subscriber information is provided to provide the service in the backup system. There was a disadvantage to be repaired by hand, which caused a lot of time wasted to provide the actual service.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object thereof is to back up subscriber information changed during the operation of the HLR system to an external backup system in real time, so that a separate subscriber by an operator can be operated even when a failure occurs in the corresponding HLR system. In addition to providing services to subscribers in real time in the backup system without recovering information, it also enables local redundancy of the corresponding HLR system.

1 is a block diagram of a typical HLR system.

2 is a diagram illustrating a subscriber information backup structure between an HLR system and a backup system according to the present invention.

3 is an operational flowchart for implementing a subscriber information backup method of an HLR system according to the present invention;

Explanation of symbols on the main parts of the drawings

20: HLR system 21, 33: main memory

22: Backup process 23, 31: TCP / IP process

30: Backup System 32: Backup Recovery Process

A feature of the present invention for achieving the above object is, in the subscriber information backup method of the ELR (HLR) system, TCP / IP protocol processing by the TCP / IP process of the HLR system by performing TCP of the external backup system Connecting the HLR system and an external backup system in connection with an IP process; Transmitting, by the backup process of the HLR system, subscriber information changed in units of blocks while the HLR system is in operation to the TCP / IP process of the backup system through the TCP / IP process of the HLR system; Transmitting, by the TCP / IP process of the backup system, the changed subscriber information of the HLR system on a block basis to the backup recovery process of the backup system; And recovering the changed subscriber information of the HLR system by the backup recovery process on a block basis and storing the changed subscriber information in the main memory of the backup system.

Transmitting the subscriber information changed in units of blocks to the TCP / IP process of the backup system, updating the subscriber information stored in the main memory of the HLR system in units of blocks when the subscriber information is changed; Setting a flag of a block corresponding to the updated subscriber information; Searching for the flag of each block in turn, and if the flag is set, backing up subscriber information of the corresponding block to the auxiliary storage device and transmitting the same to the TCP / IP process of the backup system.

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

The subscriber information backup structure between the HLR system and the backup system according to the present invention is made as shown in FIG. 2, wherein the subscriber information stored in the main memory 21 of the corresponding HLR system 20 is backed up. Is transmitted to the backup recovery process 32 via the Transmission Control Protocol / Internet Protocol (TCP / IP) process 23 and the TCP / IP process 31 of the external backup system 30 by the corresponding backup recovery process 32. Subscriber information is recovered and stored in the main memory 33 of the backup system 30.

At this time, the HLR system 20 and the external backup system 30 performs a subscriber information backup function for each auxiliary storage device (not shown) in the same manner as the general HLR system.

Meanwhile, the subscriber information backup structure described above will be described in detail by dividing each component block as follows.

First, the main memory 21 of the HLR system 20 stores subscriber information in units of blocks of a predetermined size, and the backup process 22 changes when the subscriber information stored in units of blocks in the main memory 21 is changed. The subscriber information is backed up to an auxiliary storage device (not shown) and simultaneously transferred to the TCP / IP process 23, and the TCP / IP process 23 is a TCP / IP process of the external backup system 30. After the connection 31 is received, when the changed subscriber information is received from the backup process 22, the changed subscriber information is transmitted to the corresponding backup system 30.

Next, the TCP / IP process 31 of the backup system 30 transmits the changed subscriber information transmitted from the HLR system 20 to the backup recovery process 32, and the backup recovery process 32 is the HLR system. When the changed subscriber information of 20 is received, the changed subscriber information is stored in a corresponding block of the main memory device 33, and the main memory device 33 has the same subscriber information as the main memory device 21 of the HLR system 20. Is stored in blocks of a certain size.

A subscriber information backup operation of the corresponding HLR system in the subscriber information backup structure between the HLR system and the backup system according to the present invention configured as described above will be described with reference to FIG. 3.

First, when the TCP / IP process 23 of the HLR system 20 performs protocol processing to connect the TCP / IP process 31 of the external backup system 30 (step S31), the HLR system 20 If the subscriber information is changed during system operation while being connected to the external backup system 30, the main memory 21 updates the subscriber information of the block storing the corresponding subscriber information with the changed subscriber information (step S32). Then, a flag for the corresponding block is set to indicate that the subscriber information has been changed (step S33).

At this time, the backup process 22 of the HLR system 20 searches the flags of each block stored in the main memory 21 in sequence, and if there is a block where the flag is set, the main memory 21 stores the subscriber information of the corresponding block. Backs up to the auxiliary storage, and when the backup is completed, the flag of the block is reset.

At the same time, the backup process 22 transmits the subscriber information of the block where the flag is set, that is, the subscriber information changed during system operation, to the TCP / IP process 23 (step S34).

Accordingly, the TCP / IP process 23 transmits the changed subscriber information to the external backup system 30 side initially connected (step S35).

Then, the TCP / IP process 31 of the backup system 30 transmits the changed subscriber information of the HLR system 20 to the backup recovery process 32, and the backup recovery process 32 transmits the HLR system 20. The changed subscriber information is stored in the corresponding block of the main memory device 33 (step S36).

Thereafter, the HLR system operator checks whether a failure occurs in the system (step S37), and if the failure does not occur in the HLR system, the HLR system operator returns to step S32 to continuously perform backup of subscriber information of the HLR system 20. .

However, in the case where the corresponding HLR system fails in step S37, the backup system continuously provides the service for the subscriber (step S38). At this time, since the changed subscriber information of the HLR system 20 is backed up in the main memory device 33 of the external backup system 30 in real time, the corresponding backup system 30 is applicable without a separate subscriber information recovery operation by the operator. It is possible to provide services to subscribers in real time.

In addition, the embodiments according to the present invention are not limited to the above-described embodiments, and various alternatives, modifications, and changes can be made within the scope apparent to those skilled in the art.

As described above, the present invention backs up the subscriber information changed during the operation of the HLR system to an external backup system in real time, so that even if a failure occurs in the HLR system, the subscriber in real time in the backup system without separate subscriber information recovery work by the operator. In addition to being able to provide services, local redundancy of the HLR system becomes possible.

Claims (3)

A method of backing up subscriber information of an HLR system, comprising: performing a TCP / IP protocol process by a TCP / IP process of an HLR system and connecting the TCP / IP process of an external backup system to connect the HLR system and an external backup system Process of doing; Transmitting, by the backup process of the HLR system, subscriber information changed in units of blocks while the HLR system is in operation to the TCP / IP process of the backup system through the TCP / IP process of the HLR system; Transmitting, by the TCP / IP process of the backup system, the changed subscriber information of the HLR system on a block basis to the backup recovery process of the backup system; And recovering the changed subscriber information of the HLR system by the backup recovery process on a block basis and storing the changed subscriber information in the main memory of the backup system. The method of claim 1, Transmitting the subscriber information changed in units of blocks to the TCP / IP process of the backup system, updating the subscriber information stored in the main memory of the HLR system in units of blocks when the subscriber information is changed; Setting a flag of a block corresponding to the updated subscriber information; Searching for the flag of each block in turn and if the flag is set, backing up subscriber information of the corresponding block to the auxiliary storage device and transmitting the TCP / IP process of the backup system to the ezielal system. To back up subscriber information. The method of claim 1, By checking whether a failure occurs in the HLR system, if the failure does not occur in the HLR system continuously performs a backup function of the changed subscriber information of the HLR system, and if a failure in the HLR system provides a service in real time in the backup system Subscriber information backup method of the echielal system, characterized in that.