KR100428771B1 - mobile IP system and method for phone registration and IP address assignment in the mobile IP system - Google Patents

Abstract

The method for registering a terminal and assigning an IP address in a mobile IP system according to the present invention is a method for performing user authentication and IP allocation between a terminal using a mobile IP and a home agent of the terminal. When receiving a request for registration and home agent information, performing a user registration through user authentication for a corresponding terminal, searching for home agent information of the corresponding terminal with respect to the terminal on which the user has been registered, and searching for the home agent information. Transmitting an IP address to the home agent in response to the home agent information from the terminal, requesting the home agent to allocate an IP address, and the IP address assigned from the home agent. To send to the terminal By implementing the system, the portion of the IP address allocation not provided in the mobile IP specification can be solved, and in particular, distributed IP address allocation can be made possible.

Description

Mobile IP system and method for mobile terminal registration and IP address assignment within the system {mobile IP system and method for phone registration and IP address assignment in the mobile IP system}

The present invention relates to a mobile Internet Protocol (IP) system and a method for registering a terminal and assigning an IP address in the system.

The mobile internet uses an IP assigned and pre-assigned IP address through a ppp connection and the address is unchanged.

Wireless LANs, on the other hand, use mobile IP, but there is no mention of the mechanism of assigning an initial IP and selecting an initial home agent, only a standardized application protocol (eg (See DHCP).

However, the mobile Internet has to use the same subnet as the server that must manage the terminal because the mobile Internet has to use the previously assigned IP address when handing off.

In addition, a wireless LAN may use a mobile IP address, but there is no mention of a mechanism for selecting an initial IP assignment and an initial home agent. On the other hand, manual home agent and IP address assignment by hand is possible. Thus, there is a need for a mechanism for selecting an initial IP assignment and an initial home agent.

SUMMARY OF THE INVENTION The present invention has been devised by such a need, and is convenient for users and service operators who use a mobile terminal by integrating a procedure for allocating a home agent and a terminal IP address for the terminal at the time of initial purchase of the mobile IP-enabled terminal. It is an object of the present invention to provide a mobile IP system and a method for registering a terminal and allocating an IP address therein.

1 is a block diagram of a mobile IP system according to the present invention.

2 is a flowchart for performing terminal registration and IP address allocation in a mobile IP system according to the present invention.

<Description of Symbols for Main Parts of Drawings>

1: Certification and certification and home agent information providing server (AAHS)

2: network 3: home agent server

4 proxy server 5 access point

6: wireless network 7: wireless terminal

8: wired terminal

In accordance with an aspect of the present invention, a mobile IP system includes a terminal using a mobile IP and a mobile IP system for allocating an IP to the terminal. An authentication and home agent information providing server that provides information about a home agent, and a) When a terminal registers and requests for home agent information from a terminal through a network, the terminal user's authentication information is authenticated and a home agent information providing server. Receives the information of the home agent of the terminal from the authentication and home agent information providing server to transmit to the terminal, b) When the IP address assignment request for the home agent corresponding to the home agent information from the terminal, Request the home agent to assign an IP and get it from the home agent. Send the IP address to the terminal and is configured to include a proxy server to perform the registration, and IP address assigned to the terminal.

In addition, the terminal registration and IP address allocation method in the mobile IP system according to the present invention, a terminal using a mobile IP, and a method for performing user authentication and IP allocation between the home agent of the terminal, the terminal via a network When receiving a request for terminal registration and home agent information from the terminal, performing the user registration after the user authentication for the terminal, and retrieves the home agent information for the terminal with respect to the terminal on which the user has been registered and retrieved the home Transmitting the agent information to the terminal, requesting the home agent to assign an IP address in response to the home agent information from the terminal, requesting the home agent to assign an IP address, and receiving the home agent. Send the IP address to the terminal Performs the steps.

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

1 is a block diagram of a mobile IP system according to the present invention. Referring to FIG. 1, the terminal is authenticated to the AAHS (Authenticate and Allocate Home-agent Server) 1, which authenticates the user of the terminal and provides information about the home agent of the user, and is connected to the AAHS 1 through the network 2. Agent server operating as a home agent or forest agent by mounting an Allocate IP address (AIP) module or a server application so as to allocate an IP address for an IP address request from a terminal registered in its domain area (3) ), A proxy server (4) equipped with an MS (Moible Server) module that communicates with the AAHS (1) about the terminal user's authentication information, and sends the result to the terminal, and a public network / An access point (AP) 5 that performs an interface between a public / private network, and an access point 5 through a wireless network 6 Is configured including the wireless terminal (7) to perform the use of end-stage register and the IP address assignment, the wired terminal 8 to be connected through a wired network to a proxy server (4).

AAHS 1 establishes a database of user information for each terminal. This database also contains home agent information for each terminal. Therefore, upon receiving the ID information of the terminal through the proxy server 4, it is determined whether the user is a normal user by performing authentication of the terminal, and in the case of the normal user, in the database corresponding to the ID of the terminal. The agent information is retrieved, and the retrieved home agent information is transmitted to the proxy server 4 so that the proxy server 4 is transmitted to the terminals 7 and 8.

The proxy server 4 receives the authentication information transmitted from the terminal, delivers the information to the predetermined AAHS 1, and accordingly receives the home agent information for the terminal from the AAHS 1. 8). The home agent information may include a home agent IP address corresponding to the corresponding terminal and associated optional parameter or error information. On the other hand, if there is an IP allocation request for the corresponding home agent IP address from the terminals 7 and 8, the request is transmitted to the corresponding home agent server 3 and the corresponding IP is allocated from the home agent server 3. It transmits to the terminals 7 and 8.

The access point 5 performs an interface with the wireless terminal 7 through a wireless network 6 environment, and is connected to a proxy server 4 connected through a wire to communicate between the wired terminal 8 and the proxy server 4. Perform an interface between the public and private networks.

The wireless terminal 7 and the wired terminal 8 are equipped with an ARIR (Authentication Requeset and Ipaddress Request) module for requesting user authentication information and IP address.

The home agent server 3 is equipped with an AIP (Allocate IP address) module or a server application. The home agent server 3 operates as a home agent for a terminal registered in its own area, and operates in a terminal registered outside its own area. It acts as a phosphorin agent. In any case, the agent server allocates an unused IP when a terminal registered in its own area requests an IP assignment through a network. In the drawing, the case where the HA / FA agent server 3 operates as a home agent for the terminal 7 will be described.

At this time, the terminal user information needs to be shared in order for the IP address allocation procedure to be properly performed. In other words, sharing of user information between the home agent server 3 equipped with the AIP module and the AAHS 1 is necessary, and the IP address of the proxy server 4 is also required.

Therefore, the AAHS 1 and the home agent server 3 equipped with the AIP module should maintain separate links and request and response to changes.

There is also a need for implementation of information dissemination from AAHS 1 to home agent server 3 with AIP modules.

Let us look at the procedure of assigning the registration and IP address of the terminal in the mobile IP system according to the present invention configured as described above.

The present invention basically conforms to the standards for mobile IP operation and operation, and limits only the method of home agent distribution and IP address allocation for terminals, and once the home agent distribution and IP address allocation according to the present invention is completed, the rest of the flow is performed. Is the same operation operation provided by Mobile IP.

2 is a flowchart of terminal registration and IP address allocation in a mobile IP system according to the present invention.

First, let's look at the authentication of the first terminal and the distribution operation of the home agent.

When the first terminal is purchased from the service provider, the service provider assigns a specific ID to the user, and the terminals 7 and 8 equipped with the ARIR module transmit the corresponding authentication information to the proxy server 4 (S1). In this case, the terminal may exist in an external network other than the home network designated by the service provider.

The proxy server 4 forwards this information to the predetermined AAHS 1 (S2). The AAHS 1 retrieves the home agent IP address of the user and the associated optional parameters to retrieve the proxy server 4. (S3). At this time, when an error occurs, information about the error is transmitted to the proxy server 4.

The proxy server 4 delivers this result to the terminal user who requested the authentication information (S4).

If authentication of the first terminal and distribution of the home agent are successful, an IP address allocation request is performed.

Upon successful authentication of the first terminal and distribution of the home agent, the terminals 7 and 8 equipped with the ARIR request the proxy server 4 to allocate an IP address to the distributed home agent (S5). In operation S6, the proxy server 4 transmits the information to the home agent server 3.

In this case, the home agent server 3 must be equipped with an AIP module, and the terminal must deliver information for identifying a user.

The home agent server 3 equipped with the AIP module attempts reauthentication using the user information transmitted by the terminal and, if successful, transmits the IP address assigned to the terminal through the proxy server 4 (S7). , S8). If it fails, an appropriate error message is sent to the terminal. In this case, the response to the result is not directly transmitted to the terminal, and thus can be delivered to the terminal through the proxy server 4.

According to the present invention, by assigning the first home agent to the terminal and also enabling the assignment of the home agent IP address assigned to the terminal, the portion of the IP address allocation not provided in the mobile IP specification can be solved, especially distributed. IP address assignment can be enabled.

In addition, the information on the terminal can be easily obtained through the monitoring of the home agents, and when moving to another region, the IP address can be allocated through the home agent of the corresponding terminal. There is an advantage without infringement.

Claims (4)

In a terminal using mobile IP and a mobile IP system for assigning IP to the terminal, An authentication and home agent information providing server that registers a terminal by performing use authentication of the terminal and provides information on a home agent of the terminal; a) when there is a request for terminal registration and home agent information from the terminal through a network, the authentication information of the terminal user is transmitted to the authentication and home agent information providing server, and from the authentication and home agent information providing server Receiving the information of the home agent of the terminal and transmitting it to the terminal, b) If there is an IP address allocation request for the home agent corresponding to the home agent information from the terminal, requesting the home agent to allocate an IP address and transmitting the IP address allocated from the home agent to the terminal. A mobile IP system comprising a proxy server for performing registration and IP address assignment. The mobile IP system of claim 1, wherein the network is a wired or wireless network. The method of claim 1, wherein the proxy server, A mobile IP system including an access point for performing communication between a public or private network in response to a request of a terminal providing mobility. In a method for performing user authentication and IP allocation between a terminal using a mobile IP and a home agent of the terminal, When receiving a request for terminal registration and home agent information from the terminal through a network, performing user registration through user authentication for the terminal; Retrieving home agent information on the terminal from which a user has been registered and transmitting the retrieved home agent information to the terminal; Requesting an assignment of an IP address to the home agent when an IP address allocation request is made for the home agent corresponding to the home agent information from the terminal; And registering the IP address assigned by the home agent to the terminal.