KR20030013645A - Method for MSC or SGSN Information Update in GMLC - Google Patents

Abstract

PURPOSE: A method for updating MSC(Mobile Switching Center)or SGSN(Serving GPRS Support Node) information in a GMLC(Gateway Mobile Location Center) is provided to update subscriber information stored in a DB of the GMLC and MSC or SGSN information corresponding to subscriber information whenever the location registration of a mobile communication subscriber is updated. CONSTITUTION: A subscriber transmits a location registration request message to an MSC2 or SGSN2 through an MS(Mobile Station) of a subscriber for performing a location registration(S31). The MSC2 or SGSN2 receives the location registration request message from the MS, transmits information such as an ESN(Electronic Serial Number) and an MIN(Mobile Identification Number) of the MS and its ID to an HLR(Home Location Register) and requests the location registration update(S32). The HLR performs the location registration of the subscriber, transmits a location registration cancellation message to an MSC1 or SGSN1, and cancels location registration about the subscriber stored in the MSC1 or SGSN1(S33). If the HLR transmits a response message about the request of the location registration to the MSC2 or SGSN2, the MSC2 or SGSN2 stores subscriber information in a DB and performs the location registration about the subscriber who is moved to a service area B of a local station(S34). The HLR transmits subscriber information and information of the MSC2 or SGSN2 in which the location of the subscriber is currently registered to a GMLC and notifies that the location registration of the subscriber is updated(S35). The GMLC receives subscriber information and information of the MSC2 or SGSN2 and updates information of an MSC or SGSN corresponding to the subscriber stored in its DB(S36). The GMLC transmits a response message including a GMLC s number to the HLR(S37).

Description

How to update MSC or SSG information in GMLC {Method for MSC or SGSN Information Update in GMLC}

The present invention relates to a method for updating MSC SGSN information in GMLC to perform LCS service providing location information of mobile subscriber.

In general, a mobile communication service such as a universal mobile telecommunications system (UMTS) or a global system for mobile communication (GSM) supports a location service (LCS) service that provides location information of a mobile subscriber.

1 is a system conceptual diagram for supporting the LCS.

The LCS support system basically includes a Mobile Switching Center (MSC) 14, a Serving GPRS Support Node (SGSN) 16, a Home Location Register (HLR) 10, and a Gateway Mobile Location Center (GMLC) 12. It is made to include. Here, the MSC 14 processes the voice call of the subscriber through a circuit core network and performs location registration of the subscriber existing in its service area in association with the HLR 10. The SGSN 16 processes a subscriber's data call through a packet core network and performs location registration of a subscriber existing in its service area in association with the HLR 10. In addition, the HLR 10 is a DB (Data Base) that stores all subscriber information necessary to connect a call to a subscriber's mobile station or to provide other mobile communication services.

The GMLC 12 is the first node to be accessed by the client 18 to obtain the location information of the subscriber using the LCS. The GMLC 12 works in conjunction with the MSC 14, SGSN 16, and the HLR 10. Perform the functions required to support it. That is, the GMLC 12 has a DB (not shown) that stores information on the MSC 14 or SGSN 16 in which the subscriber is registered, and when a subscriber location request is received from the client 18. After accessing the MSC 14 or SGSN 16 using the MSC 14 or SGSN 16 information stored in the DB, the subscriber requests a location measurement.

In this case, the information on the MSC 14 or SGSN 16 stored in the DB of GMLC 12 includes routing information necessary for the GMLC 12 to access the MSC 14 or SGSN 16. For example, the identification (ID) of the MSC 14 or SGSN 16 corresponds to this.

Upon receiving the subscriber location request from the GMLC 12, the MSC 14 or SGSN 16 measures the location of the subscriber in its service area and transmits the result to the GMLC 12. 12 receives this and provides the client 18 with the subscriber's location information.

However, if the subscriber moves out of the service area of a specific MSC or SGSN and moves to a service area of another MSC or SGSN and renews the location registration, the subscriber location registration is deleted from the specific MSC or SGSN and thus does not store the subscriber information. . However, since information on the specific MSC or SGSN in which the subscriber was previously registered is stored in the DB of GMLC 12, GMLC 12 stores the specific MSC or SGSN according to the MSC or SGSN information stored in the DB. Requests subscriber location measurement.

Then, the specific MSC or SGSN sends a subscriber location failure response to GMLC. GMLC 12 receives a subscriber location failure response from the specific MSC or SGSN, and then the MSC whose subscriber is currently located to HLR. Or, receives the information on the SGSN and the subscriber location measurement request to the other MSC or SGSN again.

Thus, conventionally, when there is a subscriber location request from the client 18, the GMLC 12 first requests the subscriber location information to the MSC or SGSN based on the MSC or SGSN stored in its DB. Therefore, if the subscriber moves out of the MSC or SGSN service area stored in the DB of the GMLC 12 to the service area of another MSC or SGSN, the speed of the subscriber location information providing service to the client 18 is reduced. There is a problem. Therefore, as the subscriber moves, it is necessary to update the MSC or SGSN information stored in the DB of the GMLC 12 in real time.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object thereof is to update subscriber information stored in the GMLC DB and corresponding MSC or SGSN information whenever the location registration of a mobile communication subscriber is updated. .

1 is a system conceptual diagram for supporting an LCS.

2 is a conceptual diagram of a system for providing an LCS in accordance with the present invention.

3 is a flowchart illustrating a method of updating MSC or SGSN information in GMLC according to the present invention.

4 is a flowchart illustrating a method of providing location information of a subscriber.

* Description of the symbols for the main parts of the drawings *

A feature of the present invention for achieving the above object is, in GMLC performing subscriber location information providing service (LCS), each time the location registration of the mobile communication subscriber to the MSC or SGSN is updated, the subscriber information and the Receiving and storing the location-registered MSC or SGSN information; If there is a request for the subscriber location information from a client, GMLC sends the MSC or SGSN subscriber location information obtained by making a subscriber location measurement request to a corresponding MSC or SGSN according to the subscriber information and MSC SGSN information. It is to provide a method of updating information.

On the other hand, according to an embodiment of the present invention for achieving the above object, to transmit the subscriber information and MSC or SGSN information to the GMLC in the HLR storing the subscriber information and location registration information of the mobile communication subscriber do.

2 and 3, a method of updating MSC or SGSN information in GMLC 22 according to the present invention will be described in detail. 2 is a conceptual diagram of a system for providing an LCS service according to the present invention, and FIG. 3 is an MSC2 or SGSN2 26 out of the service area A of the MSC1 or SGSN1 24 where a subscriber is registered in a mobile communication network. Is a flowchart showing a method of updating MSC or SGSN information in GMLC 22 according to the present invention.

First, in order to register a location at the current location, the subscriber transmits a location registration request message to the MSC2 or SGSN2 26 through the subscriber's MS 30 (S31). Upon receiving the location registration request message from the MS 30, the MSC2 or SGSN2 26 transmits information such as an electronic serial number (ESN), a mobile identification number (MIN), and an ID of the MS 30 to the HLR 20. Request to update the location registration (S32).

Accordingly, the HLR 20 performs location registration of the subscriber, and then transfers a location registration deletion message to the MSC1 or SGSN1 24, which has been previously registered with the subscriber, thereby saving the MSC1 or SGSN1 24. The location registration for the subscriber is deleted (S33).

Thereafter, the MSC1 or SGSN1 24 transmits a registration cancellation acknowledgment message to the HLR 20 indicating that the location registration record for the subscriber has been deleted, and the HLR 20 transmits the subscriber information with the subscriber information. When the response message to the location registration request is forwarded to the MSC2 or SGSN2 26, the location registration for the subscriber who has moved to the service area B of the home country by storing the MSC2 or SGSN2 26 subscriber information in a DB (not shown). Perform (S34). At this time, the HLR 20 stores subscriber information and information on MSC2 or SGSN () in which the subscriber is currently registered.

Meanwhile, the HLR 20 notifies the GMLC 22 that the subscriber's location registration has been updated by transmitting the subscriber information and the MSC2 or SGSN2 26 information in which the subscriber is currently registered to the GMLC 22 (S35). Accordingly, the GMLC 22 receives the subscriber information and the MSC2 or SGSN2 26 information from the HLR 20 and updates the information on the MSC or SGSN corresponding to the subscriber stored in its DB (not shown). After that, a response message including the GMLC 22 number is transmitted to the HLR 20 (S36 and S37).

A method of providing location information of a subscriber who has completed location registration through such a process will be described with reference to FIG. 4.

First, the client 28 to obtain the location information of the subscriber through the LCS requests the GMLC 22 the current location of the subscriber (S41). At this time, it is assumed that the subscriber is currently registered with MSC2 or SGSN2 26.

In response to the subscriber location request of the client 28, the GMLC 22 searches for a DB storing the MSC or SGSN information in which the subscriber is registered and requests the subscriber's location measurement to the corresponding MSC or SGSN (S42, S43). In this case, the information on the MSC or SGSN is routing information necessary for the GMLC 22 to access the MSC or SGSN. For example, the identification of the MSC or SGSN corresponds to an ID.

Upon receiving the subscriber location request from the GMLC 22, the MSC2 or SGSN2 26 provides the subscriber location information to the GMLC 22, and the MSC2 or SGSN2 26 receives the subscriber location information to the client 28. It provides (S44, S45).

Although the present invention has been described in detail only with respect to the above-described embodiments, it will be apparent to those skilled in the art that modifications or variations can be made within the spirit and scope of the present invention, and such modifications or changes are within the scope of the claims Will belong.

As described above, the present invention updates the subscriber information stored in the GMLC DB and the corresponding MSC or SGSN information each time the location registration of the mobile communication subscriber is updated, so that there is a mobile communication subscriber location request from the client. Even if the location registration is updated as the mobile subscriber moves, the subscriber can immediately request the subscriber location measurement to the MSC or SGSN that is currently registered, thereby improving the speed of providing the LCS service.

Claims (2)

In GMLC performing subscriber location information providing service (LCS), whenever the location registration of the mobile communication subscriber to the MSC or SGSN is updated, the subscriber information and the MSC or SGSN information where the subscriber is located are received and stored. Process; If there is a request for the subscriber location information from a client, GMLC sends the MSC or SGSN subscriber location information obtained by making a subscriber location measurement request to a corresponding MSC or SGSN according to the subscriber information and MSC SGSN information. How to update your information. The method of claim 1, And updating the subscriber information and the MSC or SGSN information to the GMLC in the HLR storing the subscriber information and the location registration information of the mobile communication subscriber.