KR20010002308A - Apparatus and Method for Roaming between a network and the other network in mobile communication system - Google Patents

Abstract

PURPOSE: A roaming method/device between networks using mutually different communication systems in a mobile communication system is provided to perform authentification and location register according to an authentification system of the visitor network. So that traffic transmitted between the home network and the visitor network can be minimized, accordingly, the number of lines between the networks can be reduced. CONSTITUTION: If a terminal, or a visitor requests location register by moving to another visitor network using mutually different communication systems, a visitor location management device of a visitor network checks whether the visitor is registered in a VLR(Visitor Location Register). If the visitor is registered, a visitor security device of a visitor management system searches a subscriber profile, to authenticate the visitor. Location register of the visitor is updated in the VLR and the visitor location management device inside the visitor management system. If the visitor is not registered, the visitor management system of the visitor network requests initial authentification for the visitor to an HLR(Home Location Register). The HLR of a home network checks the visitor requested in the visitor network. If the visitor is not a normal subscriber, the HLR rejects the initial authentification and location register of the visitor. If the visitor is a normal subscriber, the initial authentification is performed and a parameter generating information on annexed services and authentification for the visitor is transmitted to the visitor network.

Description

Apparatus and Method for Roaming between a network and the other network in mobile communication system

The present invention relates to roaming of a mobile communication system, and more particularly to a roaming device and method of heterogeneous manganese in a mobile communication system adapted to perform roaming between heterogeneous networks based on different communication schemes. It is about.

In general, the next generation mobile communication system is collectively referred to as IMT-2000, and it is possible to exchange multimedia information such as voice and video with a desired person anywhere in the world by guaranteeing international mobility of individual / terminal. The IMT-2000 system is under development with the aim of launching the service in the early 2000s. The frequency band of 1885 MHz to 2025 MHz and 2110 MHz to 2200 MHz is used, which is higher than the 900 MHz band used in the conventional digital cellular communication system. Provide service.

In addition, the next generation mobile communication system supports international roaming by using a method for providing a user with a terminal for a special purpose that can interoperate between heterogeneous networks using different communication methods.

On the other hand, Korean Patent Publication No. 97-68259 proposes a method for supporting roaming heterogeneous manganese, and the contents thereof are summarized as follows.

First, the next generation mobile communication system further includes a separate authentication center for storing authentication data of the terminal in order to support roaming between heterogeneous networks. When the terminal requests a location registration request to the visited network as the terminal moves, the visited network requests and receives authentication data stored in the authentication center, thereby generating authentication data of the new visiting network and authenticating the mobile terminal. Do this.

However, the method proposed in Korean Patent Laid-Open Publication No. 97-68259 has two problems as follows.

First, traffic for roaming between the visited network and the home network continues to increase, resulting in wasted lines.

In detail, the authentication center continues to communicate with the authentication center when performing the authentication and location registration for the terminal that has moved from the visited network, and the authentication center stores the authentication data through interworking with the home network. The line is established between home networks. As a result, the visited network keeps the circuit setting with the home network to pass traffic to each other, which causes the circuit to be wasted and economically expensive.

Second, when the number of visited networks that allow roaming increases due to the large amount of mobile devices, each visited network performs authentication and location registration using a different authentication policy regardless of the communication method. Therefore, there is a problem that the authentication center must provide the authentication policy of each visited network, respectively.

Accordingly, an object of the present invention has been made in view of the above-mentioned problems of the prior art, authentication for a terminal that has been moved according to the authentication scheme of each visited network when roaming between heterogeneous networks based on different communication methods. And a roaming apparatus and method for heterogeneous manganese in a mobile communication system for performing location registration.

Another object of the present invention is to provide a device and method for roaming heterogeneous networks in a mobile communication system that can reduce the number of lines established between each network by minimizing traffic transmitted between a home network and a visited network when roaming heterogeneous networks. will be.

According to an aspect of the present invention for achieving the above object, a roaming device between heterogeneous manganese in a mobile communication system, when the terminal registered in the home network moves to a visited network using a different communication method, the terminal A visitor management system for authenticating and registering a location is provided in the visiting network to perform the authentication and location registration according to the authentication policy of the visiting network.

Preferably, the visitor management system connects the home network and the visited network to each other, and converts protocols between the networks, and receives and registers authentication and additional service information from the home network. Visitor location management device that performs location registration and additional service, and visitor security management that generates and registers authentication data for the terminal through authentication information received from the home network and performs authentication using the generated authentication data. It is configured to include a device.

In addition, the authentication and additional service information is a parameter having information for generating the authentication data.

According to another aspect of the present invention for achieving the above object, a roaming method between heterogeneous manganeses in a mobile communication system is a terminal registered in the home network is moved to the visited network using a different communication method to locate to the visited network Requesting registration, requesting the home network for initial authentication of the terminal by the visitor management system of the visited network, and initial location authentication of the terminal by the home location register of the home network as the initial authentication is required. And transmitting the authentication and additional service information accordingly to the visited network, and the visitor management system of the visiting network uses the received authentication and additional service information to the terminal according to the authentication scheme of the visiting network. Performing authentication and location registration.

Preferably, before the initial authentication request, the visitor management system of the visited network checks whether the terminal is registered, and if the terminal is registered according to the check result, authenticates using the registered information. And performing location registration.

The performing of the authentication and location registration may include registering the received authentication and additional service information with the visitor location management device of the visitor management system, and using the registered authentication and additional service information with respect to the terminal. Performing registration and additional services, generating authentication data for the terminal using the received authentication information, and registering the generated authentication data with a visitor security management device of the visitor management system; And performing authentication on the terminal by using the registered authentication data.

1 is a block diagram illustrating a roaming device of heterogeneous manganese in a mobile communication system according to the present invention;

FIG. 2 is a flowchart illustrating a roaming method of heterogeneous manganese using the visitor management system shown in FIG. 1.

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

100: visitor location register (VLR) 110: exchange bureau

120: visitor management system 121: visitor location management device

122: visitor security management device 123: protocol converter

130: home location register

Hereinafter, a configuration and an operation according to an exemplary embodiment of the present invention will be described with reference to the accompanying drawings.

The roaming device of heterogeneous manganese according to the present invention is a visitor management system composed of a visitor location management device, a protocol converter, and a visitor security management device, and each visited network to which the terminal moves includes a visitor management system. Then, the roaming method of heterogeneous manganese according to the present invention uses the visitor management system in the visited network to perform authentication and location registration for the terminal that has moved according to its own authentication policy. At this time, the line setting between the home network and the visiting network is limited to one at the time of initial authentication of the terminal, thereby minimizing the number of lines set between each network.

1 is a view showing a roaming device of heterogeneous manganese in a mobile communication system according to the present invention.

Referring to FIG. 1, the visitor network performs visitor management system 120 for roaming with a home network by performing authentication and location registration / management on a mobile terminal (hereinafter, abbreviated as a visitor) and a visitor's visit. A visitor location register (VLR) 100 that registers and manages the current location, and an exchange station 110 that handles call origination and reception of the visitor.

Here, the visitor management system 120 is a protocol converter 123 for converting the protocol between each network for interworking between the visited network and the home network, and from the home location register 130 located in the home network through the protocol converter 123. Visitor location management device 121 that receives and registers an authentication parameter that can generate authentication and additional service information for the visitor, and performs location registration and additional service for the visitor using the same, and received authentication And a visitor security management device 123 which generates and registers authentication data according to the additional service information and performs authentication for the visitor using the registered authentication data.

In this case, the protocol converter 123 performs a function of converting a protocol between networks using different communication schemes. Herein, a network based on a different communication method may be a code division multiple access (CDMA) network and a GSM (Group Special Mobile, GSM) network, for example. The GSM network protocol and the IS-41 protocol used in the CDMA network are converted for interworking.

In addition, the visitor location management device 121 performs a function of location registration and additional services for the visitor, which serves as a home location register (HLR) for the visitor.

The visitor security management device 123 authenticates the visitor according to the authentication related information received from the home network, which serves as an authentication center for the visitor.

The roaming method of heterogeneous manganese using the roaming device configured as described above will be described next.

FIG. 2 is a flowchart illustrating a roaming method of manganese using the visitor management system shown in FIG. 1.

Referring to FIG. 2, when a terminal (hereinafter referred to as a visitor) moves to a different visitor network using a different communication method and requests location registration (S201 and S202), the visitor location management device of the visitor network may be a visitor. It is checked whether the subscriber is currently registered in the visitor location register (S203).

As a result of the check, if the visitor is a subscriber already registered in the visitor network, the visitor security management device of the visitor management system searches for the subscriber profile to authenticate the visitor (S204), and then visitor location register (VLR) and visitor management. A procedure for newly updating the visitor's location registration in the visitor location management device in the system is performed (S205).

On the other hand, if the visitor is a subscriber who is not currently registered in the visited network, the visitor management system of the visited network requests initial authentication of the visitor to the home location register (HLR) of the home network (S206).

At this time, the home location register of the home network rejects the initial authentication and location registration of the visitor if it is determined that the visitor is not a normal subscriber as a result of checking the visitor requested by the visit network (S211).

However, if the visitor requested by the visitor network is a normal subscriber, the home location register of the home network performs a parameter for generating additional service information and authentication information for the visitor after the initial authentication of the visitor. It transmits (S208). At this time, the home location register of the home network registers in which network the visitor is located, so the home network system can know the visited network where the terminal is currently located.

And, as described in the steps S201 to S208, the circuit according to the interworking between the home network and the visited network is set only at the time of initial authentication request and parameter transmission between the home network and the visited network, thereby minimizing the amount of traffic transmitted between each network. .

Subsequently, the visitor management system of the visited network receives a parameter for generating authentication and additional service information transmitted from the home network and registers it with the visitor location management device, and the visitor security management device authenticates the visitor through the parameter. Generate and register the data (S209).

Subsequently, the visitor location management device performs location registration and additional service of the visitor by using the registered authentication and additional service information, and the visitor security management device uses the authentication data registered according to the authentication policy which is characteristic of each visited network. Authentication is performed for the visitor by using (S210).

When the authentication and location registration for the visitor is completed through this process, the exchange office of the visitor network provides communication services such as call arrival and departure of the visitor.

At this time, the visitor location management device re-registers the location every time a new location movement of the visitor occurs or when the power is turned on or off, and the visitor security management device registers the authentication data registered at each visitor's location or call origination and incoming call. To authenticate the visitor.

Meanwhile, even when the visitor moves through a plurality of heterogeneous visit networks, the roaming method according to the present invention may be applied.

In other words, assuming that the visitor moves through two different visited networks, each visited network is provided with a visitor management system supporting the authentication system of the corresponding network. Therefore, each visited network performs the same steps S202 to S210 described above. Roaming can be performed.

As described above, the present invention has the following effects.

First, by placing the visitor location management device and the visitor security management device in a roaming-accessible visited network, the device transmits the information between the home network and the visited network to handle it whenever the terminal moves, calls are sent / received, and the terminal is turned on or off. By reducing the amount of traffic to the initial one, the number of circuits set up between networks can be reduced, which can significantly reduce costs.

Second, when a large number of visited networks occur due to the movement of the terminal, it is possible to minimize the line rental and installation costs by reducing the lines set between the visited network and the home network.

Third, when roaming between the home network and the visited network is performed according to the visited network's authentication policy, it is easy to accept various authentication policies even if the number of visited networks connected to the home network increases.

Claims (6)

In a case where a terminal registered to a home network moves to a visited network using a different communication method, Roaming device between heterogeneous networks in a mobile communication system, characterized in that the visitor management system that performs authentication and location registration for the terminal is provided in the visited network to perform the authentication and location registration according to the authentication policy of the visited network. . The visitor management system of claim 1, A protocol conversion unit which mutually converts protocols between networks by connecting the home network and the visited network to each other; A visitor location management device which receives and registers authentication and additional service information from the home network, and performs location registration and additional services for the terminal accordingly; In the mobile communication system characterized in that it comprises a visitor security management device for generating and registering authentication data for the terminal through the authentication information received from the home network, and performs authentication using the generated authentication data. Roaming device of heterogeneous manganese. The method of claim 2, wherein the authentication and additional service information, Roaming device between heterogeneous manganese in the mobile communication system, characterized in that the parameter (Parameter) having information for generating the authentication data. Requesting a location registration to the visited network by moving to a visited network using a different communication method from a terminal registered to a home network; Requesting, by the visitor management system of the visited network, the home network to initially authenticate the terminal; Performing the initial authentication on the terminal by the home location register of the home network as the initial authentication is required, and transmitting the authentication and additional service information accordingly to the visited network; Heterogeneous in the mobile communication system, wherein the visitor management system of the visited network performs authentication and location registration with respect to the terminal according to the authentication scheme of the visited network by using the received authentication and additional service information. Roaming method of manganese. The method of claim 4, wherein before the initial authentication request step, Checking, by the visitor management system of the visited network, whether the terminal is registered; And if the terminal is registered according to the result of the check, performing authentication and location registration using the registered information. The method of claim 4, wherein the performing of the authentication and location registration comprises: Registering the received authentication and additional service information with a visitor location management device of the visitor management system; Performing location registration and additional services for the terminal by using the registered authentication and additional service information; Generating authentication data for the terminal using the received authentication information, and registering the generated authentication data with a visitor security management device of the visitor management system; Roaming method between heterogeneous networks in a mobile communication system comprising the step of performing authentication for the terminal using the registered authentication data.