KR20030059533A - Apparatus and method for recovering information of subscriber in a mobile communication system - Google Patents

Abstract

PURPOSE: An apparatus and a method for recovering subscriber information in a mobile communication system are provided to recover subscriber information stored in an MSC(Mobile Switching Center) and an HLR(Home Location Register). CONSTITUTION: An MSC(100) has a subscriber database(103) for storing subscriber information of a mobile communication system. The MSC(100) has a subscriber information processing unit(101) for writing a subscriber information request message according to the request of an operator, storing subscriber information of the subscriber database(103) in an MSC subscriber information table, and updating an HLR subscriber information table received from the HLR(200) in the subscriber database(103). The MSC(100) has an RAP(Routing Access Point) routing unit(105) for storing IP addresses and transmission paths corresponding to a plurality of HLRs and setting a suitable transmission path of the subscriber information request message and the MSC subscriber information table. The MSC(100) has a TCP/IP(Transmission Control Protocol/Internet Protocol) processing unit(107) for converting the subscriber information request message and the MSC subscriber information table into a TCP/IP, and transmitting the TCP/IP to the HLR(200) through the transmission path set by the RAP routing unit(105). The HLR(200) has a subscriber database(203) for storing subscriber information of the mobile communication system. The HLR(200) has a subscriber information processing unit(201) for writing a subscriber information request message according to the request of the operator, storing subscriber information of the subscriber database(203) in the HLR subscriber information table according to the subscriber information request message received from the MSC(100), and updating the MSC subscriber information table received from the MSC(100) in the subscriber database(203). The HLR(200) has an RAP routing unit(205) for storing IP addresses and transmission paths corresponding to a plurality of MSCs, and setting a transmission path of the subscriber information request message and the MSC subscriber information table. The HLR(200) has a TCP/IP processing unit(207) for converting the subscriber information request message and the MSC subscriber information table into a TCP/IP and transmitting the TCP/IP to the MSC(100) through the transmission path set by the RAP routing unit(205).

Description

Apparatus and method for recovering subscriber information in mobile communication system {APPARATUS AND METHOD FOR RECOVERING INFORMATION OF SUBSCRIBER IN A MOBILE COMMUNICATION SYSTEM}

The present invention relates to a mobile communication system, and more particularly, to an apparatus and method for recovering subscriber information stored in a mobile switching center and a home location register.

In general, a mobile communication system is a communication system that enables communication between a mobile subscriber or between a mobile subscriber and a fixed subscriber regardless of the subscriber's position by using space propagation. The mobile communication system includes a mobile communication terminal moving in an unspecified area, a base station for transmitting / receiving messages between mobile communication terminals and managing radio resources, and various functions required for radio call processing such as handoff while controlling and managing a plurality of base stations. And a base station controller which performs a switching role in association with the base station controller and other communication networks, and performs a general function according to call processing and data exchange of the mobile communication system. And a home location register (HLR) as a database storing subscriber information for a mobile communication system subscriber. The home location register stores the subscriber number of the mobile communication subscriber, the number of the mobile communication terminal, the service type, and the location information according to the location registration of the terminal. That is, all information management for the mobile communication terminal is performed, and location information for the subscriber is updated whenever each subscriber changes location. Therefore, most subscriber information is stored. The visitor location register (VLR) provided in the mobile switching center temporarily stores and manages information of the mobile communication terminal when the mobile communication terminal enters a predetermined area controlled by the visitor location register. As a database, subscriber information is stored. Subscriber information stored in the home location register and the mobile switching center, in particular, location information plays an important role in ensuring mobility of the mobile communication terminal and making a call connection between the mobile communication terminals.

In general, a home location register and a mobile switching center transmit the subscriber information stored in an internal database to a backup server at a predetermined time interval (for example, 24 hours) in preparation for a failure, thereby double storing the information stored in the database. Recover information lost due to failure.

However, since the lost subscriber information recovery method according to the failure is performed at regular intervals, it is not possible to actively cope with a sudden failure. Therefore, a problem arises in that the call service is not performed smoothly.

Accordingly, an object of the present invention is to provide an apparatus and method for recovering subscriber information that can actively cope with a sudden occurrence of a failure.

In order to achieve the above object, the present invention provides a subscriber information recovery apparatus of a mobile communication system, comprising: a mobile switching center subscriber database for storing subscriber information of the mobile communication system; Create a subscriber information request message requesting subscriber information stored in any home location register according to an operator's request, and store subscriber information stored in the mobile switching center subscriber database according to the subscriber information request message received from the arbitrary home location register. A subscriber information processing section for constructing a table to form a mobile switching center subscriber information table, and updating a home location registration subscriber information table received from the arbitrary home location register into the mobile switching center subscriber database; A path access point routing unit which stores IP addresses and transmission paths corresponding to a plurality of home location registers and sets an appropriate transmission path between the subscriber information request message and the mobile switching center subscriber information table; And a TCP / IP processing unit for converting the subscriber information request message and the mobile switching center subscriber information table into TCP / IP and transmitting the same to the arbitrary home location register according to the transmission path set by the path access point routing unit. ,

A home location register subscriber database for storing subscriber information of the mobile communication system; Create a subscriber information request message requesting subscriber information stored in any mobile switching center according to an operator request, and table subscriber information stored in the home location register subscriber database according to the subscriber information request message received from the mobile switching center. A subscriber information processing unit configured to configure a home location register subscriber information table, and to update the mobile location subscriber information table received from the arbitrary mobile switching center into the home location register database; A path access point routing unit which stores IP addresses and transmission paths corresponding to a plurality of mobile switching centers, and sets transmission paths of the subscriber information request message and the mobile switching center subscriber information table; And a TCP / IP processing unit for converting the subscriber information request message and the mobile switching center subscriber information table into TCP / IP and transmitting the same to the mobile switching center according to the transmission path set by the path access point routing unit. Characterized in that made.

In addition, in a mobile communication system, subscriber information stored in a plurality of mobile switching stations and a plurality of home location registers capable of TCP / IP communication in a mobile communication system, the subscriber information stored in any location register according to an operator's request in the mobile switching station. Requesting the service information through TCP / IP, transmitting the table of subscriber information stored in accordance with the request to the mobile switching center via TCP / IP, and transmitting the tabled subscriber information to the mobile switching center. And a process of receiving and updating subscriber information.

1 is a diagram showing the configuration of a mobile switching center and a home location register according to an embodiment of the present invention;

2 is a diagram showing the configuration of a subscriber information request message according to an embodiment of the present invention;

3 is a diagram showing the configuration of a subscriber information table transmission message according to an embodiment of the present invention;

4 is a message flow diagram according to a process for recovering lost subscriber information according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, detailed description of well-known functions and configurations that may unnecessarily obscure the subject matter of the present invention will be omitted.

First, the structure of a mobile switching center and a home location register according to an embodiment of the present invention will be described with reference to FIG. 1 is a diagram showing the configuration of a mobile switching center and a home location register according to a subscriber information recovery apparatus according to an embodiment of the present invention.

As shown in FIG. 1, the mobile switching center 100 includes a subscriber database 103, a subscriber information processing unit 101, a routing access point (RAP) routing unit 105, and a transmission control protocol / Internet (TCP / IP). Protocol) processing unit 107 is configured. The home location register 200 includes a subscriber information processing unit 201, a subscriber database 203, a RAP routing unit 205, and a TCP / IP processing unit 207. The basic operations of the subscriber information processing units 101 and 201, the subscriber databases 103 and 203, the RAP routing units 105 and 205, and the TCP / IP processing units 107 and 207 provided in the mobile switching center 100 and the home location register 200 are similar. . However, there is a difference in performing detailed operations depending on whether the apparatus equipped with each functional unit is the mobile switching center 100 or the home location register 200. This is described in detail below.

The subscriber database 103 stores subscriber information including location information of a mobile communication subscriber stored in the mobile switching center 100.

The subscriber information processing unit 101 performs overall control according to the subscriber information recovery process according to the present invention. The subscriber information processing unit 101 creates a subscriber information request message requesting subscriber information stored in any home location register according to the operator's request. Then, the subscriber information stored in the subscriber database 103 is tabulated according to the subscriber information request message received from the arbitrary home location register to form a mobile switching center subscriber information table. The subscriber information table of the home location register received from the arbitrary home location register is also updated in the subscriber database 101.

The RAP routing unit 105 stores IP addresses and transmission paths corresponding to the plurality of home location registers of the mobile communication system, and sets an appropriate transmission path of the subscriber information request message and the mobile switching center subscriber information table.

The TCP / IP processing unit 107 converts the subscriber information request message and the mobile switching center subscriber information table into TCP / IP and transmits them to any home location register according to the transmission path set by the RAP routing unit 103.

The subscriber database 203 stores subscriber information of a mobile communication system stored in the home location register 200.

The subscriber information processing unit 201 creates a subscriber information request message requesting subscriber information stored in any mobile switching center in accordance with an operator's request. Then, the subscriber information stored in the subscriber database 203 is tabulated according to the subscriber information request message received from the mobile switching center to construct a home location register subscriber information table. It also updates the database 203 with a mobile switching center subscriber information table received from any mobile switching center.

The RAP routing unit 205 stores IP addresses and transmission paths corresponding to a plurality of mobile switching centers, and sets transmission paths of the subscriber information request message and the mobile switching center subscriber information table.

The TCP / IP processing unit 207 converts the subscriber information request message and the mobile switching center subscriber information table into TCP / IP and transmits the same to the arbitrary mobile switching center according to the transmission path set by the RAP routing unit 205. .

The subscriber information recovery device including the mobile switching center 100 and the home location register 200 having the above structure has an MMC 110 which is a command for requesting information stored in any home location register or any mobile switching center. ) Operates according to the input. MMC (110, 210) is input to the subscriber information processing unit (101, 201) through the RAP routing unit (105, 205), remote polling request (Remote) input to the mobile switching center 100 and the home location register (200) via a communication line in another network Polling Request (RPREQ) and Local Poll Me Request (LPMFEQ), which are entered directly into the mobile switching center through the channel in its own network. The RPREQ is a command for requesting subscriber information from a remote network at a remote location, and is configured as follows.

RPREQ [JOB ID = z] [HLR NO = x] [MSC NO = y]

The JOB ID field is used to distinguish the subjects requesting the subscriber information. The JOB ID field value z is set to 1 when the home location register requests the subscriber information, and the JOB ID field when the mobile station requests the subscriber information. Let the value z be 2. The HLR NO field indicates a signal point allocated corresponding to each of a plurality of home location registers constituting the mobile communication system according to the present invention, and x is a home location register signal point value. The MSC NO field is a field indicating a signal point allocated corresponding to each of a plurality of mobile exchanges constituting the mobile communication system according to the present invention, and y is a mobile exchange signal point value. The HLR NO field and the MSC NO field are determined according to the side requesting the subscriber information and the side providing the subscriber information according to the request. For example, when an operator requests subscriber information from any mobile switching center to recover subscriber information of a home location register, the JOB ID field value of the RPREQ becomes 1, and the HLR NO field value x indicates the subscriber information. A signal point value of the home location register, and an MSC NO field value y is a signal point value of any mobile switching center that provides subscriber information in accordance with a subscriber information request.

The LPMFEQ is a command for requesting subscriber information from a local mobile switching center to a home location register, and is configured as follows.

LPMREQ [: HLR NO = x]

When receiving the MMC (110, 210) as described above, the subscriber information processing unit (101,201) creates a subscriber information request message to be sent to the mobile switching center or home location register. The subscriber information request message is configured as shown in FIG. 2 is a diagram showing the configuration of a subscriber information request message according to an embodiment of the present invention. The subscriber information request message includes a MOC (Multy Operation Code) field 11, a DRAP (Destination Routing Access Point) field 13, an ORAP (Origination Routing Access Point) field 15, and an IDIDify field 17. , Incoming connection ID field 19, message indicator field 21, PFX list field 23, and Result field 24. The MOC field 11 is 1 for requesting subscriber information from the home location register to the mobile switching center, and 2 for requesting subscriber information from the mobile switching station to the home location register. The DRAP field 13 stores access point configuration data as a field indicating a called party's destination to which the subscriber information request message is to be transmitted. The ORAP field 15 stores access point configuration data as a field indicating a calling party for transmitting the subscriber information request message. The IDentify field 17 is a field indicating a connection ID of a calling party for TCP / IP communication, and a called connection ID field 19 is a field indicating a connection ID of a called party for TCP / IP communication. to be.

The access point configuration data stored in the DRAP field 13 and the ORAP field 15 is composed of a mobile switching center signal point or a home location register signal point and a service code for distinguishing a service operation. The mobile switching center signal point and the home location register signal point are uniquely assigned to each mobile switching center and home location register. The service code is divided into four categories as follows. When the mobile switching station requests subscriber information from the home location register, when the mobile location requesting subscriber information from the home location register, when the mobile switching center transmits subscriber information table to the home location register, the subscriber from the home location register to the mobile switching center This is the case when the information table is transmitted. The subscriber information request message receiver recognizes the service code and performs a corresponding operation.

The subscriber information processing units 101 and 201 transmit the subscriber information request message to the RAP routing units 105 and 205 when the subscriber information request message is completed. The RAP routing unit 105, 205 searches for an IP address and a path corresponding to the destination mobile switching center or home location register according to the contents of the field of the subscriber information request message, sets an appropriate path, and transmits it to the TCP / IP processing unit 107, 207. The TCP / IP unit 107, 207 converts the subscriber information request message for TCP / IP and transmits it to the corresponding mobile switching center or home location register.

When the mobile switching center 100 or the home location register 200 receives the subscriber information request message as described above, the subscriber information processing units 101 and 201 configure the subscriber information table by tabulating the subscriber information stored in the subscriber databases 103 and 203. do. The configuration of the subscriber information table is shown in the following table.

PC_SSN (1: 100) Stored subscribers Tuple key index ... ... ...

Index (1: 50000) Subscriber Information ... ...

In the above table, PC_SSN information is a value input to CDE when an initial package is provided, and the remaining values are variably changed according to stored subscriber information. If the PC_SSN information is configured to accommodate up to 100, if the number of home location registers or mobile switching centers is 30, the number of subscriber information is not determined from the 31st tuple.

The subscriber information table as shown in the above table configures the first tuple of subscriber databases 103 and 203 as keys, and maps the first PC_SSN information of the subscriber information table. At this time, check how many PC_SSN values exist and save the number of loops. The subscriber database is searched for as many times as the number of loops, and the number of subscribers is found and stored in the subscriber information table.

Subscriber information is stored in a registration notification encoding form in an index table using a tuple key index value from the first tuple of the subscriber information table. When performing the second tuple operation, the tuple key index value of the first tuple is multiplied by 100 to store as many subscribers as 1 is added.

When the configuration of the subscriber information table as described above is completed, the subscriber information processing units 101 and 201 configure a subscriber table transmission message to transmit the subscriber information table to the mobile switching center or home location register which requested the subscriber information. The subscriber table transmission message is configured as shown in FIG. 3 so that the subscriber information table can be transmitted to the corresponding mobile switching center or home location register because it includes destination information. Referring to FIG. 3, the configuration of a subscriber table transmission message is as follows. 3 is a diagram illustrating a configuration of a subscriber information table transmission message according to an embodiment of the present invention. As shown in FIG. 3, the subscriber information table includes the MOC field 31, the DRAP field 33, the ORAP field 35, the call connection ID field 37, the call connection ID field 39, and the message length field 41. ), A message indicator field 41, a WV (Window Value) field 45, a data field 47, and a Result field 24. The MOC field 31 stores three when the subscriber information table is transmitted from the mobile switching center to the home location register, and four when the subscriber information table is transmitted from the home location registrar to the mobile switching center. The DRAP field 33 stores access point data consisting of a signal point and a service operation of the called party mobile switching center or the called home location register which receives the subscriber information table. The ORAP field 35 stores access point data consisting of the originating mobile switching center 100 signal point originating the subscriber information table or the originating home location register 200 signal point and service operation. The outgoing connection ID field 37 is a field indicating a connection ID of a calling party for TCP / IP communication, and a called connection ID field 39 is a field indicating a connection ID of a called party for TCP / IP communication. The message length field 41 is a field indicating the size of the subscriber information table.

The subscriber information processing unit 101, 201 outputs the subscriber information table together with the subscriber information table to the RAP routing unit 105, 205 when the subscriber table transmission message of the structure described above is completed. Or send to home location register.

The subscriber information processing unit (101,201) updates the subscriber database (103,203) upon receiving the subscriber information table from any mobile switching center or any home location register.

In order to help understanding of the present invention, the home location register 200 requests the subscriber information to the mobile switching center 100 to recover lost subscriber information with reference to FIG. 4. 4 is a message flow diagram illustrating a procedure for recovering lost subscriber information according to an embodiment of the present invention.

As shown in FIG. 4, the message and the subscriber information table between the mobile switching center 100 and the home location register 200 are converted into TCP / IP and transmitted and received. Referring to FIG. 4, when the home location register subscriber information processing unit 201 receives an RMTPREQ from the operator in step 301, the home location register subscriber information processing unit 201 proceeds to step 303. In step 303, the home location register subscriber information processing unit 201 processes data for connection establishment and subscriber information request, and proceeds to step 305. In step 305, the home location register subscriber information processing unit 201 transmits a connection establishment request and a subscriber information request message to the mobile switching center 100. In step 307, the subscriber information processing unit 101 of the mobile switching center that receives the connection establishment request and the subscriber information request message allocates a connection ID, assigns a remote work number, and proceeds to step 309. In step 309, the subscriber information processing unit 101 of the mobile switching center transmits a connection setting confirmation message to the home location register 200. Thereafter, the mobile switch subscriber information processing unit 101 creates a subscriber information table in step 311 and proceeds to step 313. In step 313, the mobile switching center subscriber information processing unit 101 transmits a creation start message to the home location register 200, and the flow proceeds to step 315. In step 315, the mobile switching center subscriber information processor 101 transmits the completion message to the home location register 200 in step 317, and proceeds to step 319. In step 319, the mobile switching center subscriber information processing unit 101 performs data processing for transmitting the subscriber information table, and proceeds to step 321. In step 321, the mobile switching center subscriber information processing unit 101 transmits the subscriber table transmission message and the subscriber information configuration table to the home location register 200 and proceeds to step 323. In step 323, the mobile switching center subscriber information processing unit 101 transmits the transmission completion message to the home location register 200 when the transmission of the subscriber information table is completed. When the home location register subscriber information processing unit 101 receives the transmission completion message in step 325, the home location register subscriber information processing unit 101 transmits the connection termination message to the mobile switching center 100. The mobile switching center subscriber information processor 101 transmits the connection termination response message to the home location register 200 when it receives the connection termination message in step 327. When the home location register subscriber information processing unit 201 receives the connection termination response message, the home location register subscriber information processing unit 201 updates the received subscriber information table in the subscriber data 203 in step 231 to recover lost subscriber information.

In the above description of the present invention, specific embodiments have been described, but various modifications may be made without departing from the scope of the present invention. Therefore, the scope of the present invention should not be defined by the described embodiments, but should be determined by the equivalent of claims and claims.

As described above, the present invention recovers subscriber information that can actively cope with a sudden failure.

Claims (3)

In the subscriber information recovery apparatus of the mobile communication system, A mobile switching center subscriber database storing subscriber information of the mobile communication system; Create a subscriber information request message requesting subscriber information stored in any home location register according to an operator's request, and store subscriber information stored in the mobile switching center subscriber database according to the subscriber information request message received from the arbitrary home location register. A subscriber information processing section for constructing a table to form a mobile switching center subscriber information table, and updating a home location registration subscriber information table received from the arbitrary home location register into the mobile switching center subscriber database; A path access point routing unit which stores IP addresses and transmission paths corresponding to a plurality of home location registers, and sets an appropriate transmission path between the subscriber information request message and the mobile switching center subscriber information table; And a TCP / IP processing unit for converting the subscriber information request message and the mobile switching center subscriber information table into TCP / IP and transmitting the same to the arbitrary home location register according to the transmission path set by the path access point routing unit. , A home location register subscriber database for storing subscriber information of the mobile communication system; Create a subscriber information request message requesting subscriber information stored in any mobile switching center according to an operator request, and table subscriber information stored in the home location register subscriber database according to the subscriber information request message received from the mobile switching center. A subscriber information processing unit configured to configure a home location register subscriber information table, and to update the mobile location subscriber information table received from the arbitrary mobile switching center into the home location register database; A path access point routing unit which stores IP addresses and transmission paths corresponding to a plurality of mobile switching centers, and sets transmission paths of the subscriber information request message and the mobile switching center subscriber information table; And a TCP / IP processing unit for converting the subscriber information request message and the mobile switching center subscriber information table into TCP / IP and transmitting the same to the mobile switching center according to the transmission path set by the path access point routing unit. Subscriber information recovery apparatus, characterized in that made. A method for recovering subscriber information stored in a plurality of mobile switching centers and a plurality of home location registers capable of TCP / IP communication in a mobile communication system, Requesting subscriber information stored in any location register through TCP / IP at the request of an operator at any mobile switching center; The arbitrary location register tabulates the stored subscriber information according to the request and transmits the stored subscriber information to the mobile switching center through TCP / IP; And the mobile switching center receives and updates the tabled subscriber information. The method of claim 2, Requesting, by the arbitrary home location register, the subscriber information through TCP / IP from the mobile switching center according to an operator's request; The mobile switching station tabulates the stored subscriber information according to the request and transmits the stored subscriber information to the home location register through TCP / IP; And the home location register further comprises the step of receiving and updating the tabled subscriber information.