KR20050117856A - Point to point protocol server authentication method in a roaming service - Google Patents

Abstract

The present invention relates to a PPI server authentication method in a roaming service.

The present invention provides a method comprising: checking whether there is a change in the location of a service area or a country of a terminal attempting to connect to a WAP service when there is an attempt to connect to a WAP (Wireless Application Protocol) service; If there is a change in service area or country, allocating and transmitting Point-to-Point Protocol (PPP) authentication information to the corresponding terminal; Storing the transmitted PPP authentication information in a terminal therein; And performing a PPP connection approval procedure with the terminal using the PPP authentication information stored in the terminal.

Accordingly, the present invention provides a mobile terminal capable of providing a wireless Internet service according to a WAP protocol, a wireless terminal such as PDA (Personal Digital Assistants), and a mobile communication system interoperating with the same. Alternatively, when a mobile service provider changes to a location and receives a roaming service that changes the service provider, when the terminal attempts to connect to the WAP service, the system checks whether the terminal has changed in the service area or country, and then confirms the new PPP authentication information. By assigning and transmitting the PPP authentication failure, there is an effect that the service provider can be provided with the wireless Internet service in other service areas or countries.

Description

POINT TO POINT PROTOCOL SERVER AUTHENTICATION METHOD IN A ROAMING SERVICE}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile communication system, and more particularly, to a mobile communication terminal capable of providing a wireless Internet service according to a WAP (Wireless Application Protocol) protocol, a wireless terminal such as a personal digital assistant (PDA), and a mobile communication system interoperating with the same. When the terminal is moved to a service area or a country and receives a roaming service in which a telecommunication service provider is changed, the system determines whether the terminal has changed the service area or country when the terminal attempts to connect to the WAP service. By identifying and transmitting new PPP authentication information, the present invention relates to a PPI server authentication method in a roaming service that enables a service provider to connect to a PPP server in another service area or country.

In general, in order to be provided with a wireless Internet service using a mobile communication terminal according to the WAP (Wireless Application Protocol) protocol, a user authenticates his / her own terminal with a PPP (Point-to-Point Protocol) authentication server, and WAP The authentication procedure with the gateway must be performed.

On the other hand, the process of receiving the wireless Internet service in the conventional mobile communication terminal will be described with reference to the signal flow diagram of FIG.

First, when a user selects a menu key or a function key and attempts to connect to a WAP service by executing a WAP application program embedded in the mobile communication terminal 10 (S10), the terminal 10 sends a PPP to the system 20. By transmitting authentication information, the system 20 receives a connection to the PPP server (S11, S12).

In this case, the PPP authentication information transmitted from the terminal 10 to the system 20 to be authenticated by the PPP server is an ID and password stored in the terminal 10 received from a communication provider, and the user confirms and inputs the ID. Rather, the WAP application program reads the PPP authentication information stored in the terminal and transmits the PPP authentication information to the system 20.

Then, when the PPP approval is completed and connected to the PPP server (S13), the terminal 10 receives WAP gateway authentication information such as a user ID and a password through a query response with the user and transmits it to the system 20 ( S14).

At this time, the WAP application program in the terminal 10 also transmits a site address and connection port information such as a URI (Universal Resource Identifier) or a URL (Universal Resource Locator) that the user wants to access.

Then, the system 20 confirms the WAP gateway authentication information and approves the connection with the WAP gateway server to the terminal 10 (S15). Accordingly, the WAP gateway uses the site address and connection port information requested by the user. By connecting to the server, the wireless Internet service is provided to the terminal 10 through the mobile communication network and the WAP gateway linked thereto (S16 and S17).

As described above, in the related art, the mobile communication terminal 10 intending to use the wireless Internet service receives a roaming service in order to communicate in a service area of different communication providers by moving a service area or a country. In this case, the PPP authentication information for the WAP service connection is given to each communication provider when the terminal 10 is released and stored in the terminal 10, so that the PPP authentication information is also changed due to a change in service area or country. Although it is impossible for a user to access, check, and change the PPP authentication information stored in the terminal 10, there is a problem that the wireless Internet service cannot be provided due to PPP authentication failure in another service area or country.

Accordingly, the present invention has been proposed in order to solve the above-described problems, and in the mobile communication terminal, a wireless terminal such as a PDA and the like, and a mobile communication system interoperating therewith, capable of providing a wireless Internet service according to the WAP protocol, Is moved to a service area or a country, and the service provider is provided with a roaming service that is changed, when the terminal attempts to connect to a WAP service, the system checks whether the terminal has changed in the service area or country, and then confirms the new PPP authentication information. The purpose of the present invention is to provide a method for enabling a service provider to connect to a PPP server in another service area or country by allocating and transmitting the same.

The present invention for achieving the above object, if there is an attempt to connect to a WAP (Wireless Application Protocol) service, and confirming whether there is a change in the location of the service area or country of the terminal attempting to connect to the WAP service; If there is a change in service area or country, allocating and transmitting Point-to-Point Protocol (PPP) authentication information to the corresponding terminal; Storing the transmitted PPP authentication information in a terminal therein; And performing a PPP connection approval procedure with the terminal by using the PPP authentication information stored in the terminal.

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

FIG. 2 is a flowchart illustrating an operation of a PPP server authentication method in a roaming service according to the present invention. As shown in FIG. 2, when a WAP (Wireless Application Protocol) application is executed and WAP service connection is attempted, WAP service connection is attempted. Checking whether there is a change in the location of a service area or country of the terminal (S20, S21); If there is a change in service area or country, allocating and transmitting Point-to-Point Protocol (PPP) authentication information to the corresponding terminal (S22); Storing PPP authentication information transmitted from the system side (S23); Connecting to a PPP server by performing a PPP connection approval procedure using the stored PPP authentication information (S24); In step S25 and S26, the wireless data communication is performed through an authorization procedure with the WAP gateway server.

The present invention can be applied to a wireless terminal such as a mobile communication terminal, a personal digital assistant (PDA) capable of providing a wireless Internet service according to a WAP (Wireless Application Protocol) protocol, and when the present invention is applied, the terminal is applied to a service area or a country. Even when the service provider is provided with a roaming service that changes its location, the system has a procedure to check whether the terminal receives roaming service during the WAP service, that is, whether the service area or country has changed. For example, if there is a change, the PPP authentication information is transmitted from the corresponding system to the corresponding terminal, so that the wireless Internet service can be provided in another service area or country.

In the present invention, the system refers to a base station for providing a mobile communication service, a mobile communication network including a mobile switching center (MSC) and a packet data service node (PDSN) for providing a packet data service in association with the mobile communication network, and PPP authentication. It is assumed to include a packet data network, such as a server and a WAP gateway server.

When a user selects an Internet connection key or a menu key displayed on the terminal to execute a WAP application program embedded in the terminal in order to use the wireless Internet service through the wireless terminal, the terminal attempts to connect to the system with the WAP service. (S20).

At this time, the terminal transmits the terminal information and the service connection request message for the WAP service connection to the base station as an access channel message (Access Channel Message) through the access channel, and if the base station transfers it to the exchange, The exchange checks the subscriber information for the terminal to determine whether the terminal attempting to connect to the WAP service has applied for roaming service and whether the service area or country of the terminal has been changed (S21).

As a result of the check, if there is no change in the service area or country, the system transmits a message for transmitting PPP authentication information through a paging channel to the corresponding terminal, and connects to the PPP server according to a normal PPP connection approval procedure. (S24), and thus connects to the WAP gateway server to perform wireless data communication (S25, S26).

On the other hand, if there is a change in service area or country, the system-side exchange allocates PPP (Point-to-Point Protocol) authentication information to the corresponding terminal and transmits it through the paging channel (S22).

Here, the PPP authentication information refers to the ID and password that the service provider grants to each terminal for the PPP connection, and the new PPP authentication information transmitted from the system side is separately stored in the internal memory of the terminal by the WAP application program (S23). In the future, the WAP service is used for the same service provider.

Next, the WAP application program performs a PPP connection approval procedure with a system side using the stored new PPP authentication information to connect with a PPP server (S24).

In this case, the terminal distinguishes and manages PPP authentication information for each service provider by using the system information received through the paging channel message, and when the new PPP authentication information is transmitted from the system, it is system side than the previously stored PPP authentication information. Priority is given to the PPP connection approval procedure by giving priority to the new PPP authentication information received from the WAP application. Thus, the WAP application reads the new PPP authentication information stored in the terminal and transmits it to the system to connect to the PPP server from the system. Approved.

Next, when the PPP approval is completed and the PPP server and the terminal are connected, the WAP application program of the terminal performs an approval procedure with the WAP gateway server (S25). The terminal inputs a user ID input through a query response with the user. WAP gateway authentication information such as a password and a site address such as a URI (Universal Resource Identifier) or a URL (Universal Resource Locator) that the user wants to access are transmitted to the system, and thus the WAP gateway authentication information in the system After confirming that the terminal approves the connection with the WAP gateway server and connects to the WAP gateway server using the site address and connection port information requested by the user, the user can perform wireless data communication (S26). .

As described above, the present invention relates to a mobile communication terminal capable of providing a wireless Internet service according to a WAP (Wireless Application Protocol) protocol, a wireless terminal such as a PDA (Personal Digital Assistants), and a mobile communication system interoperating with the same. When the terminal is moved to a service area or a country and receives a roaming service in which a telecommunication service provider is changed, when the terminal attempts to connect to a WAP service, the system checks whether the terminal has changed in the service area or country. By allocating and transmitting new PPP authentication information, a PPP authentication failure can be prevented, so that a service provider can receive a wireless Internet service in another service area or country.

1 is a signal flow diagram illustrating a process of receiving a wireless Internet service in a conventional mobile communication terminal.

Figure 2 is a flow chart showing the operation of the PPP server authentication method in the roaming service of the present invention.

Claims (3)

When there is an attempt to connect to a WAP (Wireless Application Protocol) service, checking whether there is a change in the location of a service area or a country of the terminal to which the WAP service is connected; If there is a change in service area or country, allocating and transmitting Point-to-Point Protocol (PPP) authentication information to the corresponding terminal; Storing the transmitted PPP authentication information in a terminal therein; And performing a PPP connection approval procedure with the terminal using the PPP authentication information stored in the terminal. The method of claim 1, wherein in the step of allocating and transmitting the PPP authentication information, the system transmits an ID and a password for connection with a PPP server to a terminal through a paging channel. Way. The PPI of claim 1, wherein the performing of the PPP connection approval procedure with the terminal performs a PPP connection approval procedure by giving priority to new PPP authentication information received from the system in the terminal. Server authentication method.