KR100271304B1 - A method of handling location updates in intelligent networks for imt-2000 services - Google Patents

Abstract

The present invention relates to a location update processing method in an intelligent network for providing an IMT-2000 service. The present invention relates to updating a location of a user moving from one location area to another location area of an intelligent network performing an IMT-2000 service. Update).

In the present invention, the location update request message is transmitted from the user's mobile station (MS) to the predetermined location registration control function (LRCF) through a predetermined service access control function (SACF) that manages the mobile station. After the function unit obtains a new IMUI for the user, the location update request process comprising the steps of authenticating the user and encrypting the radio link, and the service access control function unit from the predetermined position registration data function unit (LRDF). After a new TMUI has been assigned to the mobile station, a new TMUI is notified to the mobile station, a new ID assignment process notifying the location registration control function that the new TMUI has been well delivered to the mobile station, and the TMUI and LAI to the new location registration data function. And the location information updating process is notified to the mobile station.

According to the present invention, even in the case where the user moves from an arbitrary location area to another location area in IMT-2000, continuous service is possible.

Description

A method of handling location updates in intelligent networks for International Mobile Telecommunications-2000 services

The present invention relates to a method for processing location update in an intelligent network. In particular, the present invention relates to a method for continuously providing a service even when a user receiving an IMT-2000 service moves from one location area to another. A method of updating location information of a user, that is, a location update processing method in an intelligent network for providing an IMT-2000 service.

IMT-2000 (International Mobile Telecommunications-2000) is a third generation mobile communication system standardized for service by the International Telecommunication Union (ITU) around 2000 with global participation mainly in Europe, USA and Japan.

1 is a block diagram of an intelligent network for providing an IMT-2000 service, and includes a mobile station 110, a base station 120, a base station controller 130, and a mobile communication switching center 140. Center), a service controller 160 (Service Control Point) 160, a VLR (Visitor Location Register) 150, and a service data system 170 (Service Data Point).

In this case, the mobile station 110 includes a Call Control Access Function (CCAF) 111 and a Terminal Access Control Agent Function (TACAF 112), and the CCAF 111 is a functional element that performs a service access function for a user. The TACAF 112 is a functional element that provides a connection for a mobile terminal, such as controlling a bearer and performing paging.

In addition, the base station controller 130 is provided with a terminal access control function unit 131 (TACF), which is a functional element that performs a relationship setting and overall control function between the mobile station 110 and the network, and the mobile communication switching center 140 has a service. Performs a service exchange function unit 141 (SSF) that is a function to perform a switching function, a call control function unit 142 (CCF) that is a function element to process a call or a connection, and a control function not related to a call or bearer. A service access control function unit 143 (SACF) or the like that is a functional element is provided.

The VLR 150 includes a location registration control unit 151 (LRCF), which is a function element that performs mobility control logic for location registration, and a location registration data function unit 152, which is a function element having a subscriber profile or location registration data. (LRDF) is provided, and the service controller 160 includes a service control function unit 161 (SCF) which is a functional element that performs a service control function.

In addition, the service data system 170 includes a service data function unit 171 (SDF), and the service data function unit 171 is a function that can be accessed in real time from the service control function unit 161 to provide an intelligent network service. As an element, it contains information about users and networks.

2 is a schematic diagram of a location area in a wireless switching network. The wireless switching network divides a usage area into a plurality of location areas for effective use of radio resources, and one location area is composed of a plurality of cells. Each cell has a base station that allows the base station to communicate wirelessly with the mobile station.

Accordingly, the base station 120 transmits a voice, data, or control signal to the mobile station 110 in a cell under its control through a wireless channel. On the contrary, the base station controller receives the voice, data, or control signal of the mobile station 110 through a wired line. It passes the 130 to the mobile communication switching center 140.

At this time, the mobile communication switching center 140 provides a circuit switching service for interworking with a fixed telephone network, and the VLR 150 has location information on all subscribers currently serving by the mobile communication switching center 140. .

On the other hand, the location management function is the biggest feature of the mobile communication system, which, unlike the fixed network service, in order to allow the subscriber using the IMT-2000 terminal to receive the service while moving, through interaction with the mobile terminal This function should be provided by the network side.

Location management can be largely divided into Location Update and Location Registration.

Location registration requires access to the HLR (Home Location Register) (not shown) because the VLR 150 does not have a user profile, and location registration does not have a user profile due to network or other errors. This is a necessary procedure if you do not

However, location update refers to updating location information of a corresponding terminal on a VLR (Visitor Location Register) 150 connected to a mobile communication switching center when the terminal enters a new location area while moving. At this time, since the user profile is already stored in the VLR 150 before the location update, the HLR does not need to be accessed.

That is, the location update that can occur frequently in the state where one call is established is a very important function for the IMT-2000 service.

Therefore, when the IMT-2000 service user is provided with the IMT-2000 service in any cell 211 included in one location area 210 and moves to a cell 221 included in another location area 220. There is a need for a method of updating a user's location in order to continue to receive the service.

Accordingly, the present invention has been made to meet the above needs, and the IMT-2000 service user is provided with the IMT-2000 service in an arbitrary cell 211 included in one location area 210, while another location area ( When moved to the cell 221 included in the 220, to provide a method for updating the location of the user to continue to receive the service, that is, to provide a location update processing method in the intelligent network for providing IMT-2000 services There is this.

In order to achieve the above object, a location update processing method in an intelligent network for providing an IMT-2000 service according to the present invention includes a location update request message from a mobile station (MS) of a predetermined IMT-2000 service user. .) Passing to a predetermined location registration control function (LRCF) through a service access control function (SACF) that manages the mobile station (MS); And the location registration control unit (LRCF), after obtaining a new IMUI for the user, performing an authentication operation for the user and encryption of a radio link; The service access control function SACF receives a new TMUI for the user from a predetermined position registration data function LRDF, and then notifies the mobile station MS of the new TMUI, and the new TMUI is transmitted to the mobile station MS. A new ID assignment process informing the location registration control function (LRCF) that it has been well communicated to the MS); And updating the TMUI and the LAI with a new one by the location registration data function unit LRDF, and updating the location information which is notified to the mobile station MS.

In this case, the new ID assignment process may include: transmitting a response message (Start Ciphering resp.conf.) For an encryption operation from the mobile station (MS) to the service access control function (SACF); The service access control unit (SACF) sending a TMUI query request message (TMUI query req.ind.) To the location registration control unit (SACF); The location registration control function SACF sends the TMUI query req.ind. To the location registration data function LRDF, and the location registration data function LRDF sends a new TMUI to the user. Assigning; The location registration data function (LRDF) sending a response message (TMUI query resp.conf.) To the location registration control function (LRCF) in response to the TMUI query request (TMUI query req.ind.); Passing the newly allocated TMUI from the location registration control function (LRCF) to the mobile station (MS) via the service access control function (SACF); The mobile station (MS) sending a response message (TMUI assignment resp.conf.) Indicating that the new TMUI information is well received to the service access control function (SACF); And the service access control function SACF may send the response message TMUI assignment resp.conf. To the location registration control function LRCF.

The location information updating process may further include sending an update request message (TMUI modify req.ind.) Requesting the location registration control function (LRCF) to update the TMUI to the location registration data function (LRDF); The location registration data function unit (LRDF) updating a TMUI for a corresponding user, and then sending a response message (TMUI modify resp.conf.) To the location registration control unit (LRCF) in response to an update request message; The location registration control function (LRCF) sending an update request message (LAI update req.ind.) For the LAI to the location registration data function (LRDF); The location registration data function (LRDF) updating the corresponding LAI and then sending a response message (LAI update resp.conf.) To the location registration control function (LRCF) in response to the LAI update request message; And the location registration control unit (LRCF) sending a message (Terminal Location update resp.conf.) Indicating that the terminal location update is completed through the service access control unit (SACF) to the mobile station (MS). Can be configured.

1 is a configuration diagram of an intelligent network for providing an IMT-2000 service;

2 is a schematic diagram of a location area in a wireless switching network;

3 is a flowchart of a location update method of the present invention;

4 is a detailed sequence chart of the position update method of the present invention.

* Explanation of symbols for main parts of the drawings

110: mobile station (MS) 111: CCAF

112: TACAF 120: base station (BS)

130: base station controller (BSC) 131: terminal access control function (TACF)

140: mobile communication switching center (MSC) 141: service switching function (SSF)

142: call control function 143: service access control function (SACF)

150: VLR 151: position registration control function (LRCF)

152: position registration data function unit (LRDF)

160: service controller (SCP) 161: service control function (SCF)

170: service data system (SDP) 171: service data function (SDF)

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

3 is a flowchart of a location update method of the present invention, and FIG. 4 is a detailed sequence chart of the location update method of the present invention. The present invention provides a location update request process (P310), a new ID assignment process ( P320), and the location information update process (P330).

First, the location update request process P310 will be described.

The location update request message (Terminal Location update req.ind.) From the user's mobile station 110 is transmitted to the predetermined service access control function unit 143 managing the mobile station 110, and the user's location update starts.

The service access control function unit 143 receiving the location update request message (Terminal Location update req.ind.) Sends this message (Terminal Location update req.ind.) To the location registration control function unit 151 again. This message includes the Temporary Mobile User Identity (TMUI) to identify the user and the identifier of the newly moved Location Area (hereinafter referred to as LAI).

The location registration control unit 151, which has received the message including the TMUI and the LAI, obtains the corresponding International Mobile User Identity (IMUI) using the TMUI (IMT-2000 user ID acquisition step).

Then, in the user authentication and wireless link encryption step, the authentication operation for the user and the encryption operation of the wireless link are performed.

Through this process, the location update request process P310 is performed, and a new ID allocation process P320 is performed next.

The new ID allocation process P320 notifies the mobile station 110 of the new TMUI after the service access control unit 143: SACF receives the new TMUI for the user from the location registration data unit 152: LRDF. And, it is a process of notifying the location registration control function unit 151 that the new TMUI is well delivered to the mobile station (110).

More specifically, first, a response message (Start Ciphering resp.conf.) For the encryption operation is transmitted from the mobile station 110 to the service access control unit 143, and the service access control unit 143 is located again. The registration control function unit 151 sends a TMUI query request message (TMUI query req.ind.).

The location registration control function unit 151 which receives the TMUI query request message (TMUI query req.ind.) Sends this message (TMUI query req.ind.) To the location registration data function unit 152 again. The function unit 152 allocates a new TMUI to be used to identify a user in the new location area.

The location registration data function unit 152 assigning a new TMUI sends a response message (TMUI query resp.conf.) To the location registration control unit 151 in response to the TMUI query request message (TMUI query req.ind.). .

Then, the newly allocated TMUI is transmitted to the mobile station 110 through the service access control function unit 143 by a message (TMUI assignment req.ind.) That conveys the TMUI.

Upon receipt of the newly assigned TMUI, the mobile station 110 sends a response message (TMUI assignment resp.conf.) Indicating that it has received TMUI information to the service access control function unit 143, and the service access control function unit 143 again. By sending this message to the location registration control function unit 151, a new TMUI assignment process is performed, and after the new ID assignment process P320 is completed, the location information update process P330 is performed.

The location information updating process P330 updates the TMUI and the LAI with a new one by the location registration data function unit 152 (LRDF), which is notified to the mobile station 110 (MS).

More specifically, the location registration control function unit 151 receiving a message (TMUI assignment resp.conf.) Indicating that the newly allocated TMUI is well received from the mobile station 110 transmits the TMUI to the location registration data function unit 152. Sends an update request message (TMUI modify req.ind.) Requesting the update.

Then, the location registration data function unit 152 updates the TMUI for the corresponding user, and then sends a response message (TMUI modify resp.conf.) To the location registration control function unit 151 in response to the update request message.

The location registration control unit 151 receiving the response message (TMUI modify resp.conf.) For the update request message returns to the location registration data function 152 for the LAI update req.ind. The location registration data function unit 152 updates the LAI for the user, and then sends a response message (LAI update resp.conf.) To the location registration control unit 151 after updating the LAI for the corresponding user. give.

And, the location registration control unit 151 responds to the terminal location update request message (Terminal Location update req.ind.) That the service access control unit 143 sent to itself in the above location update request process (P310). Send a message (Terminal Location update resp.conf.) To the service access control unit (143).

In addition, the service access control function unit 143 (SACF) responds to the terminal location update request message (Terminal Location update req.ind.) That the mobile station 110 sent to itself in the location update request process (P310). update resp.conf.) to the mobile station 110.

Through the above process, the location update for the IMT-2000 service user who has moved from the arbitrary location area 210 to the other location area 220 is made, so that the continued service is possible.

Of course, if the location update for the user is successfully made, it should be notified to a predetermined call control function (142: Call Control Function) that manages the call control function to continue the call processing.

As described above, the present invention can be used in the functional element 143 (SACF) that is in charge of the location update function of the exchange 140 (MSC) for the IMT-2000 system, and also any location in which the user is located. When moving from an area to another location area, there is an effect that continuous service is possible.

Claims (3)

A method of updating a location of a user who has moved from one location area (LA) of another intelligent network performing an IMT-2000 service to another location area, the mobile station 110 (MS) of the user A location update request message (Terminal Location update req.ind.) Is transmitted to a predetermined location registration control function unit 151 (LRCF) through a predetermined service access control function unit 143 (SACF) that manages the mobile station 110. The step; And A location update request process, wherein the location registration control function unit 151 obtains a new IMUI for the user, and then performs authentication for the user and encryption of a radio link; The service access control function unit 143 receives a new TMUI for the user from a predetermined location registration data function unit 152 (LRDF), and then notifies the mobile station 110 of the new TMUI. A new ID assignment process of notifying the location registration control function unit 151 that the mobile station 110 has delivered well; And In the intelligent network for providing an IMT-2000 service, characterized in that the location registration data function unit 152 updates the TMUI and LAI to a new one, which includes a location information update process that is notified to the mobile station 110. How to handle location update. The method of claim 1, wherein the new ID assignment process comprises the steps of: transmitting a response message (Start Ciphering resp.conf.) For the encryption operation from the mobile station (110) to the service access control function unit (143); The service access control function unit 143 sending a TMUI query request message (TMUI query req.ind.) To the location registration control function unit 151; The location registration control unit 151 sends the TMUI query request message (TMUI query req.ind.) To the location registration data function unit 152, and the location registration data function unit 152 sends a new TMUI to the user. Assigning; The location registration data function unit 152 sending a response message (TMUI query resp.conf.) To the location registration control unit 151 in response to the TMUI query request (TMUI query req.ind.); Transmitting the newly assigned TMUI from the location registration control function (151) to the mobile station (110) through the service access control function (143); The mobile station 110 sending a response message (TMUI assignment resp.conf.) Indicating that the new TMUI information is well received to the service access control function unit 143; And The service access control function unit 143 may be configured to include sending the response message (TMUI assignment resp.conf.) To the location registration control function unit 151. Location update processing method in intelligent network. The update request message (TMUI modify req.ind.) Of claim 1, wherein the location information update process requests the location registration control function unit 151 to update the TMUI to the location registration data function unit 152. Sending; The location registration data function unit 152 updating a TMUI for the corresponding user, and then sending a response message (TMUI modify resp.conf.) To the location registration control function unit 151 in response to the update request message; The location registration control function unit 151 sending an update request message (LAI update req.ind.) For the LAI to the location registration data function unit 152; The location registration data function unit 152 updating the corresponding LAI and sending a response message (LAI update resp.conf.) To the location registration control function unit 151 after the LAI update request message; And The location registration control function unit 151 sends a message (Terminal Location update req.ind.) Indicating that the terminal location update is completed through the service access control function unit 143 to the mobile station 110. Location update processing method in an intelligent network for providing IMT-2000 service, characterized in that configured.