KR100471615B1 - System for managing IP address of Internet service provider using RADIUS server and method thereof - Google Patents

Abstract

The present invention relates to an IP address management system for an Internet service provider subscriber using a RADIUS server and a method thereof.

To this end, the system and method thereof according to the present invention can incorporate an address assignment function for dynamically allocating an IP address in a RADIUS server managing authentication and billing in a home ISP network, or interwork with a DHCP server dedicated to address management. The built-in DHCP client function allows mobile ISP subscribers to receive subscriber authentication, dynamic IP address assignment, renewal of service, and termination of service by simply accessing a RADIUS server through a wireless mobile packet network.

Accordingly, the present invention enables the ISP subscriber to be provided with wireless Internet and mobile packet data service support through the home ISP network connection through the GPRS network, and also provides dynamic IP address allocation and management of the home ISP network to the ISP subscriber. It is easy to interwork with GPRS network and home ISP network, and GPRS network gateway node does not need to know information about DHCP relay and server of home ISP network and does not need access to DHCP server of home ISP network. It provides an effect.

Description

System for managing IP address of Internet service provider using RADIUS server and method

The present invention relates to an IP address management system and method of an Internet service provider subscriber using a RADIUS server. More particularly, the present invention relates to a mobile ISP subscriber who has moved to a GPRS network and authenticates the subscriber through a connection with a RADIUS server in a home ISP network. The present invention relates to an IP address management system and an IP address management system of an Internet service provider subscriber using a RADIUS server for allocating a dynamic IP address of a home ISP network.

The Universal Mobile Telecommunication System (UMTS), a third generation mobile communication system that is being standardized in the 3rd General Partnership Project (3GPP), defines a general packet radio service (GPRS) system to provide packet data services such as the Internet.

Here, UMTS is called the official name of the IMT-2000 asynchronous system mainly in Europe.

In the above, the GPRS system has an IP-based backbone network for communication between a Serving GPRS Support Node (SGSN) and a Gateway GPRS Support Node (GGSN) performing a packet switch function.

The Serving GPRS Support Node (SGSN) is a packet switching device that stores location information of each terminal to provide GPRS services to subscribers, and performs subscriber authentication and matching with a Gateway GPRS Support Node (GGSN).

The GGSN is a packet network switching device that assigns an IP address to a user requesting packet service, delivers packet data from SGSN to an external packet network, and performs a tunneling function to deliver external packet data to a subscriber.

GPRS system provides roaming service for ISP subscriber through interworking with ISP (Internet Service Provider) network and defines mobile IP system for providing mobile IP service.

When the ISP subscriber accesses the GPRS packet mobile network, the GPRS system performs the authentication process for the ISP subscriber and the IP allocation process in the ISP through the Gi interface, and opens a bearer for packet transmission. do.

Here, the Gi-interface is a reference point between GPRS and an external packet data network.

Therefore, the mobile ISP subscriber is assigned an IP address in the home ISP network by accessing the RADIUS authentication server and the address assignment server of the home ISP network through the GPRS network. At this time, the IP address is assigned at the time of subscription if it is static and at the time of packet data protocol context activation.

To this end, the mobile ISP subscriber must forward the authentication request and information to the GGSN upon activation of the packet data protocol context, which is done through a Configuration Option in the information element of the GPRS Tunneling Protocol (GTP).

Conventional ISP subscriber IP address allocation and management uses a Dynamic Host Configuration Protocol (DHCP) server, which is an address assignment dedicated server.

In addition, when a mobile ISP subscriber moving to a GPRS network is assigned a dynamic IP address in the home ISP network, the GPRS system must access a DHCP server in the home ISP network through GGSN, which is a gateway node.

However, fixed or mobile ISP subscribers can only assign dynamic IP addresses necessary to receive Internet and packet data services through a DHCP server connection. However, the current DHCP server or DHCP relay has a problem that the DHCP client in the GGSN does not have a function for identifying whether the dynamic IP address assignment in the home ISP network, or moving to another network requires dynamic IP address assignment.

In addition, even if a DHCP server or a DHCP relay identifies a request for dynamic IP address allocation, there is a problem that the mobile ISP network subscriber does not support the dynamic IP address allocation function of the home ISP network.

The present invention has been made to solve the above problems, and an object of the present invention is that the ISP subscriber to the GPRS network by enabling the subscriber authentication as well as dynamic IP address allocation, renewal release in the home ISP network only by connecting to the RADIUS server The present invention provides an IP address management system and an IP address management system for subscribers of an Internet service provider using a RADIUS server that provides wireless Internet and mobile packet data service support through a home ISP network connection.

A feature of the IP address management method of an Internet service provider subscriber using a RADIUS server according to the present invention for realizing the above object is to manage authentication and billing in a home Internet service provider (ISP) network. A first step of embedding an address assignment function for dynamic allocation of an IP address in a remote authentication dial-in user service (RADIUS) server; A second step of a mobile ISP subscriber requesting a subscriber authentication, IP address assignment, renewal, and release function to the RADIUS server through the wireless mobile packet network; And a third step of performing, by the RADIUS server, a subscriber authentication, an IP address assignment, an update, and a release function requested by the mobile ISP subscriber, and informing the mobile ISP subscriber of the result through the wireless mobile packet network.

The RADIUS server is a RADIUS authentication server that performs a procedure for checking and determining the identity of a subscriber accessing the system, and manages the subscriber's IP address; And a RADIUS billing server that grants the right to log in when the ISP is subscribed and manages the system fee.

The subscriber authentication and IP address assignment request of the mobile ISP subscriber of the third step is

An address assignment step of the RADIUS authentication server performing subscriber authentication on the authentication and IP address assignment request message transmitted from the mobile ISP subscriber, and then selecting a dynamic IP address and transmitting it to the mobile ISP subscriber through the wireless mobile packet network; A billing start step of transmitting, by the mobile ISP subscriber, a billing start request message to the RADIUS billing server using a dynamic IP address allocated in the address assignment step; And a charging response step of the RADIUS charging server transmitting a response message to the mobile ISP subscriber through the wireless mobile packet network with respect to the charging start request message received in the charging start step.

The renewal request for use of the IP address of the mobile ISP subscriber of the third step,

The RADIUS authentication server includes an address update step of transmitting a response message for the authentication transmitted from the mobile ISP subscriber and the dynamic IP address use update request message to the mobile ISP subscriber through the wireless mobile packet network.

The termination request for the IP address of the mobile ISP subscriber of the third step is

The RADIUS billing server, the release request step of generating a use release request message of a dynamic IP address for a charge termination request message sent from a mobile ISP subscriber and transmitting it to the RADIUS authentication server; The RADIUS authentication server which receives the use release request message of the dynamic IP address in the release request step, generates and sends a response message to release the use of the dynamic IP address to the RADIUS charging server; And in response to the RADIUS accounting server receiving a response message from the RADIUS authentication server in the release response step, generating a charging termination response message for the use of the dynamic IP address and transmitting the message to the mobile ISP subscriber.

On the other hand, another feature of the IP address management method of the Internet service provider subscriber using the RADIUS server according to the present invention is a remote authentication dial-in to manage authentication and billing in the home Internet Service Provider (ISP) network. A first step in which a user service (Remote Authentication Dial-In User Service, RADIUS) server embeds a client function to a Dynamic Host Configuration Protocol (DHCP) server for address management of dynamic IP; A second step of a mobile ISP subscriber requesting a subscriber authentication, IP address assignment, renewal, and release function to the RADIUS server through the wireless mobile packet network; When the RADIUS server transmits an address management request message to a DHCP server, the DHCP server performs an IP address allocation, update, and release function requested by the mobile ISP subscriber, and then the result of the execution of the RADIUS server through the wireless mobile packet network. Transmitting to the third step; And a fourth step of the RADIUS server informing the mobile ISP subscriber of the subscriber authentication result and the dynamic IP address management result through the DHCP server through the wireless mobile packet network.

The RADIUS server may include: a RADIUS authentication server that performs a procedure of identifying and determining a subscriber's identity accessing a system and embeds the DHCP client function; And a RADIUS billing server that grants the right to log in when the ISP is subscribed and manages the system fee.

The mobile ISP subscriber of the second to fourth steps requests subscriber authentication and dynamic IP address assignment,

The RADIUS authentication server may include an address assignment request step of transmitting, to the DHCP server, an authentication request message for mobile ISP subscriber and a dynamic IP address assignment transmitted through a wireless mobile packet network; An address assignment step of transmitting and receiving a message between the client / server for address assignment and the DHCP server, the DHCP server having received the dynamic IP address assignment request message through the address assignment request step; The RADIUS authentication server transmitting a result of notifying a mobile ISP subscriber of the dynamic IP address and subscriber authentication result assigned by the DHCP server through the address assignment step through the wireless mobile packet network; And the mobile ISP subscriber transmits a charging start request message to the RADIUS charging server through a wireless mobile packet network, and the RADIUS charging server transmits a response message for the charging start request message to the mobile ISP subscriber through a wireless mobile packet network. It includes a starting step.

The mobile ISP subscriber of the second to fourth steps may request to renew the use of the dynamic IP address.

The RADIUS authentication server receiving an authentication and dynamic IP address update request message through the wireless mobile packet network, and transmitting an update request message of the dynamic IP address to the DHCP server; An address update response step of the DHCP server transmitting a response message to the RADIUS authentication server in response to the update request message of the dynamic IP address; And the RADIUS authentication server transmitting a result of notifying the mobile ISP subscriber of the authentication and the renewal of the dynamic IP address through the wireless mobile packet network.

The mobile ISP subscriber of the second to fourth steps may terminate the use of the dynamic IP address.

The RADIUS accounting server may include a charging termination request step of transmitting a usage termination message of a dynamic IP address to the DHCP server in response to a termination request message of a mobile ISP subscriber transmitted through a wireless mobile packet network; The RADIUS billing server sends a release message of the dynamic IP address to the RADIUS authentication server, and the RADIUS authentication server sends a response message to the RADIUS billing server to respond to a release message of the dynamic IP address. step; And the RADIUS charging server transmitting a result of notifying the mobile ISP subscriber of the charging termination response message for the use of the dynamic IP through the wireless mobile packet network.

A feature of the IP address management system of an Internet service provider subscriber using a RADIUS server according to the present invention is that when a mobile Internet service provider (ISP) subscriber accesses through a wireless mobile packet network, the identity of the subscriber is checked. A remote authentication dial-in user service (RADIUS) authentication server that performs a procedure for determining and performs management functions for allocating, updating, and terminating a dynamic IP address; And a RADIUS billing server that grants the right to log in upon ISP subscription and manages the addition of the system fee.

Meanwhile, another feature of the IP address management system of an Internet service provider subscriber using a RADIUS server according to the present invention is a dynamic IP address for a mobile Internet service provider (ISP) subscriber connected through a wireless mobile packet network. A DHCP server that performs address management functions for the assignment, renewal of use, and termination of use; Remote Authentication Dial- User service for performing a client function to the DHCP server in response to a request for management of a mobile ISP subscriber's address in association with the DHCP server, and for verifying and determining the identity of the ISP subscriber. An RADIUS server including an RADIUS authentication server and a RADIUS billing server that grants a right to log in when the ISP is joined in association with the RADIUS authentication server or the DHCP server and manages the system fee.

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

It is apparent to those skilled in the art that the information mentioned in any one embodiment can be applied to other embodiments even if it is not specifically mentioned in the other embodiments.

1 illustrates a configuration of an IP address management system of an Internet service provider subscriber using a RADIUS server according to an embodiment of the present invention.

As shown in FIG. 1, a system according to an embodiment of the present invention is a general-purpose packet radio service (GPRS) network 100 that provides a packet data service, and a GSM that is a digital mobile phone system interworking with the GPRS network 100. (Global System For Mobile Communication) Internet service provider, which is a company that provides the network (200), Mobile Internet Protocol (MIP) network (300), Internet (400), and the Internet (400) access services to individuals or companies. Service Provider (ISP) network 500 is interworked with each other.

The GPRS network 100 includes a terminal equipment (TE) 101 and a mobile terminal (MT) 102, a terminal interface 101 and a mobile terminal 102, UTRAN (UMTS Terrestial Radio). Access Network (110), SGSN (120), SGSN switch / router 130 that connects each other between the network layers, GGSN (140), GPRS DNS / DHCP (150), which connects the packet data in a predetermined path GGSN's hub / default router 160 is included.

At this time, DNS is an abbreviation of Domain Name Sever, GPRS DNS / DHCP 150 converts the IP address to the location of the Internet domain name and assigns and manages the IP address.

The GSM network 200 may include a Mobile Switch Center (MSC) / Visitor Location Resister (VLR) 210, a Home Location Resister (HLR) 220, and other authentication servers (Authentication). Server, AS), RAN, GMSC (Gateway MSC).

The MIP network 300 serves as a home agent (310) and a visited network, which are necessary when the mobile terminal serves as a home network for the mobile terminal in interworking functions between the Internet to support the function of the mobile IP. FA (Foreign Agent) 320, Web server 330, authentication for security, authorization authorization and accounting (AAA) / DHCP relay 340, DNS for billing according to the amount of authorization and data traffic Server / DHCP server 350.

The home ISP network 500 connects to the ISP subscriber via the GPRS network 100 for authentication and dynamic IP address assignment. The home ISP network 500 connects to the Internet (HUB) by the hub / default router 510 and provides RADIUS. Server / DNS server / DHCP relay 520, DHCP server 530, Layer 2 Tunneling Protocol (L2TP) / PPP server 540, web server 550, and the like.

RADIUS is an abbreviation for Remote Authentication Dial-In User Sever. In addition, the RADIUS server 520 grants the subscriber RADIUS authentication server 521 which performs a procedure for checking and determining the identity of subscribers accessing the system, and the right to log in when joining an Internet service provider. A RADIUS accounting server 522 is managed to manage the addition.

An operation of an IP address management system of an Internet service provider subscriber using a RADIUS server according to an embodiment of the present invention configured as described above will be described in detail with reference to the accompanying drawings.

2 is a diagram illustrating a signal interworking procedure between a GPRS network and a home ISP network in an IP address management method of an Internet service provider subscriber using a RADIUS server according to an embodiment of the present invention.

As shown in FIG. 2, the terminal device TE and the mobile station MT transmit and receive an initial access signal, a PPP link establishment signal, a PPP authentication signal, a PPP Internet Protocol Control Protocol (IPCP) message, and a PPP IPCP response message. Link establishment and PPP authentication are performed through connection. At this time, the mobile terminal stores authentication parameters.

Thereafter, the GPRS network establishes a packet data protocol (PDP) session. That is, the mobile terminal sends a packet data protocol context request generation message to the SGSN, and the SGSN sends a packet data protocol context request generation message to the GGSN.

In this way, when the SGSN receives a packet data protocol context creation response message from the GGSN, the SGSN sends a packet data protocol context request response message to the mobile terminal.

As described above, when the packet data protocol (PDP) session setup is completed in the GPRS network, the mobile ISP subscriber can obtain the authentication and dynamic IP address through the connection between the GGSN in the GPRS network and the RADIUS server or DHCP server in the ISP network. Proceed with the assignment.

At this time, when the RADIUS server performs authentication and dynamic IP address allocation and management, the RADIUS / DHCP client of GGSN sends a RADIUS access request message to the RADIUS server of the home ISP network. The RADIUS server then sends a RADIUS Access Allow message to the RADIUS / DHCP Client.

On the other hand, when the RADIUS server and the DHCP server work together to perform authentication and dynamic IP address allocation and management, GGSN's RADIUS / DHCP client requests connection with the RADIUS server, allows RADIUS authentication and connection, and DHCP server. Sends and receives DHCP Discovery, DHCP Offer, DHCP Request, and DHCP Acknowledgment messages.

Thereafter, the GGSN stores the dynamic IP address allocated from the home ISP network, constructs a Network Control Protocol (NCP) -IPCP configuration-acknowledgment packet, and transmits the packet to the mobile packet terminal through the SGSN.

According to an embodiment of the present invention, a method of managing an IP address of a service provider subscriber in the Internet includes: When a mobile ISP subscriber accesses a home ISP network through a GPRS network, the mobile ISP subscriber accesses a RADIUS server and the RADIUS server authenticates a subscriber. In addition, IP address allocation and renewal function are performed.

Above, RADIUS server has built-in IP management function to perform dynamic IP allocation and management by itself, and RADIUS server can also have a separate DHCP server internally to perform dynamic IP allocation and management by interworking itself. have.

First, FIG. 3 is a diagram illustrating an embodiment using a RADIUS server in a home ISP network in an IP address management method of an Internet service provider subscriber using a RADIUS server according to an embodiment of the present invention.

As shown in FIG. 3, the mobile ISP subscriber transferred to the GPRS network processes subscriber authentication, IP address assignment, IP address renewal, and IP address release functions only by accessing a RADIUS server having authentication and billing functions of the home ISP network. do.

First, the process of handling subscriber authentication and dynamic IP address assignment of the home ISP network, GGSN moves to the RADIUS authentication server 521 of the home ISP network, the authentication and dynamic IP address assignment request message of the ISP subscriber (Access-Request ).

At this time, the authentication and dynamic IP address assignment request message includes an attribute of a user name, a password, and the like.

Then, the RADIUS authentication server of the home ISP network authenticates the mobile ISP subscriber, selects a dynamic IP address through the IP pool managed by the RADIUS server, and authenticates with GGSN and assigns a dynamic IP address request-access message (Access-Accept). Send it.

The address assignment request response message includes attributes such as session-timeout, termination action, and framed IP.

In order for the mobile ISP subscriber to start the wireless Internet and mobile packet data service using the dynamic IP address of the home ISP network allocated above, the GGSN sends a charging start request message to the RADIUS charging server 522 of the home ISP network (Acct-Request). Send it. The RADIUS charging server transmits an charging start request response message (Accct-Response) for the charging start request of the GGSN to the GGSN.

The charging start request message includes attributes such as Charge-Status-Type (start), Session-ID, NAS-IP, and Framed IP.

Secondly, the RADIUS server processes a request for renewing a dynamic IP address while the mobile ISP subscriber moving to the GPRS network receives the wireless Internet and mobile packet data service using the dynamic IP address of the home ISP network.

In this case, the message used for the dynamic IP address update uses the same message as the message used for the authentication and dynamic IP allocation request for the mobile ISP subscriber. Since the attribute is defined differently, the message is used as the IP update function.

GGSN sends authentication and dynamic IP address access-request messages to the RADIUS server in the home ISP network. Then, the RADIUS authentication server of the home ISP network transmits an access message (Access-Accept) to the GGSN for authentication and request for renewal of use of the dynamic IP address.

In this case, the use update request message of the dynamic IP address includes attributes such as a user name and a password, and the use update request response message includes attributes such as session-timeout, termination action, and framed IP.

Third, the RADIUS server handles the termination of the use of the dynamic IP address of the home ISP network assigned to the mobile ISP subscriber who moved to the GPRS network.

When GGSN sends a Charge End Request message (Acct-Request) to the RADIUS Billing Server in the home ISP network, the End Request Message, an End Request message, the RADIUS Billing Server goes to the RADIUS Authentication Server. Send the release request message (IP Release Request).

The RADIUS authentication server then sends a response message (IP Release Response) to the RADIUS accounting server for the dynamic IP deactivation request, and the RADIUS accounting server (Acct-Response) indicates the end of the use of dynamic IP address allocation with the GGSN. ).

At this time, the end-use request message of the dynamic IP address includes attributes such as charging-status-type (stop), charging-session-ID, NAS-IP, and framed IP, and release request message and release response of the dynamic IP address. The message contains attributes such as framed IP.

Next, FIG. 4 is a diagram illustrating an embodiment using both a RADIUS server and a DHCP server in a home ISP network in an IP address management method of an Internet service provider subscriber using a RADIUS server according to an embodiment of the present invention.

As shown in FIG. 4, the method according to the embodiment of the present invention provides a separate DHCP server internally in a RADIUS server in a home ISP network so that authentication and dynamic IP address allocation processing can be performed in conjunction with the RADIUS server.

That is, the mobile ISP subscriber moving to the GPRS network processes the subscriber authentication, IP address assignment, IP address renewal, and IP address release by interworking with the RADIUS server and the DHCP server in the home ISP network.

First, mobile ISP subscribers moving to GPRS network are assigned subscriber authentication and dynamic IP address through self-association of RADIUS server and DHCP server in home ISP network.

To this end, GGSN sends an authentication and dynamic IP address assignment request message (Access-Request) for the mobile ISP subscriber to the RADIUS authentication server in the home ISP network. Then, between the RADIUS authentication server and the DHCP server in the home ISP network, messages such as DHCP exploration, DHCP provisioning, DHCP request, and DHCP acknowledgment are sent and received for dynamic IP address assignment of the mobile ISP subscriber.

In this case, messages such as DHCP discovery, DHCP provision, DHCP request, and DHCP acknowledgment between the RADIUS authentication server and the DHCP server are typically messages exchanged between the DHCP client and the DHCP server. In the above, the RADIUS authentication server performs a DHCP client or a DHCP relay function.

Above, the authentication and dynamic IP address assignment request message includes attributes such as username, password, and the like. DHCP exploration messages include user name (or NAI) and required IP attributes, DHCP-provided messages include IP and lease time attributes, DHCP request messages such as IP attributes, and DHCP acknowledgment messages. It contains properties such as IP and lease time, respectively.

After sending and receiving messages between the RADIUS authentication server and the DHCP server, the RADIUS authentication server sends an access message (Accept-Accept) to the GGSN for authentication and dynamic IP address assignment requests. Contains the assigned dynamic IP address.

In order for the mobile ISP subscriber to start the wireless Internet and mobile packet data service using the dynamic IP address of the home ISP network allocated above, the GGSN sends an Act-Request to the RADIUS billing server.

The RADIUS server that receives the charging start request from the GGSN sends the charging start request response message (Acct-Response) to the GGSN.

At this time, the authentication and dynamic IP address assignment request response message includes attributes such as session-timeout, termination action, and framed IP, and the charging start request message includes charging-status-type (start), charging-session-ID, It contains attributes such as NAS-IP and framed IP.

Secondly, the mobile ISP subscriber moving to the GPRS network by RADIUS authentication server and DHCP server interworking with the dynamic IP address of the home ISP network receives the dynamic IP attention update request while using the wireless Internet and mobile packet data service. It's a process.

GGSN sends the authentication and dynamic IP address update request message (Access-Request) to the RADIUS server in the home ISP network. The RADIUS authentication server then sends a DHCP Request message (DHCP Request), which is an IP address update request message, to the DHCP server for renewal of the dynamic IP address, and the DHCP server sends a DHCP request message, which is a dynamic IP address update request response message, to the RADIUS authentication server. Send an acknowledgment message (DHCP ACK).

Here, the DHCP request message and the DHCP acknowledgment message is a message typically exchanged between the DHCP client and the DHCP server, and the RADIUS authentication server operates as a DHCP client or a relay. Therefore, the RADIUS authentication server, RADIUS billing server and DHCP server in the home ISP network should be operated in association with each other.

In this way, the RADIUS authentication server sends an access message to the GGSN for the authentication and dynamic IP update request.

At this time, the authentication and dynamic IP address update request message includes attributes such as a user name and a password. The DHCP request message has properties such as IP, the DHCP acknowledgment message has properties such as IP and lease time, and the update request response message of authentication and dynamic IP addresses has properties such as session-timeout, termination action, and framed IP. It includes each.

Third, the RADIUS server and the DHCP server interoperate with each other to handle the termination of the dynamic IP address of the home ISP network assigned to the mobile ISP subscriber who has moved to the GPRS network.

When GGSN sends a Charge-End Request message (Acct-Request) to the RADIUS Billing Server in the home ISP network to terminate the use of the Dynamic IP address, the RADIUS Billing Server sends a DHCP IP Server End-of-Use message (DHCP Release). ).

At this time, the use end message of the dynamic IP address is a message normally exchanged between the DHCP client and the DHCP server.

In addition, the RADIUS accounting server sends a dynamic IP address release message (IP Release Request) to the RADIUS authentication server, and the RADIUS authentication server sends a response message (IP Release Response) to the RADIUS accounting server.

Finally, the RADIUS accounting server sends a charge end response message (Acct-Response) to the GGSN to terminate the use of the dynamic IP address.

At this time, the charge termination request message includes attributes such as charging-status-type (stop), charging-session-ID, NAS-IP, and framed IP, and disables the use of dynamic IP address and dynamic IP address. The response message includes a framed IP attribute.

In general, a mobile ISP subscriber moving to a GPRS network needs to access a DHCP server in a home ISP network in order to allocate and use a dynamic IP address of the home ISP network. To this end, first, the authentication of the mobile ISP subscriber should be made through the connection of the RADIUS authentication server in the home ISP network. When the authentication is successfully completed, the mobile ISP subscriber uses the network gateway node to connect to the DHCP server in the home ISP network. It is possible to be assigned an IP address.

After all, the mobile ISP subscriber obtains the authentication through connection with the authentication server of the home ISP network to allocate the dynamic IP address of the home ISP network, and then allocates the dynamic IP address of the home ISP network through the DHCP server of the home ISP network. Will receive.

However, an embodiment according to the present invention can handle subscriber authentication and dynamic IP address allocation, renewal, and release functions only by accessing a RADIUS server including an authentication and RADIUS billing server in a home ISP network. have.

The drawings and detailed description of the invention are merely exemplary of the invention, which are used for the purpose of illustrating the invention only and are not intended to limit the scope of the invention as defined in the appended claims or claims. Therefore, those skilled in the art will understand that various modifications and equivalent other embodiments are possible from this. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

Dynamic IP address management system and method for subscribers of Internet service provider using RADIUS server according to the present invention enables the subscriber to authenticate the subscriber as well as the dynamic IP address allocation and renewal in the home ISP network by simply accessing the RADIUS server. There is an effect that the ISP subscriber can efficiently provide the wireless Internet and mobile packet data service support through the home ISP network via the GPRS network.

In addition, the present invention is easy to allocate and manage the dynamic IP address of the home ISP network to the mobile ISP subscriber, the interworking between GPRS network and home ISP network, GPRS network gateway node is a DHCP relay and server of the home ISP network There is no need to know the information about the network and the effect of not needing to connect to the DHCP server of the home ISP network.

1 illustrates a configuration of an IP address management system of an Internet service provider subscriber using a RADIUS server according to an embodiment of the present invention.

2 is a diagram illustrating a signal interworking procedure between a GPRS network and a home ISP network in an IP address management method of an Internet service provider subscriber using a RADIUS server according to an embodiment of the present invention.

3 is a diagram illustrating an embodiment using a RADIUS server in a home ISP network in an IP address management method of an Internet service provider subscriber using a RADIUS server according to an embodiment of the present invention.

4 is a diagram illustrating an embodiment using both a RADIUS server and a DHCP server in a home ISP network in an IP address management method of an Internet service provider subscriber using a RADIUS server according to an embodiment of the present invention.

Claims (12)

RADIUS authentication server that performs the process of verifying and determining the identity of subscribers accessing the system to manage authentication and billing in the home Internet Service Provider (ISP) network, and manages the subscriber's IP address; Dynamic assignment of IP addresses to a Remote Authentication Dial-In User Service (RADIUS) server, which includes a RADIUS billing server that grants the right to log in upon the ISP subscription and manages the addition of system fees. A first step of embedding an address assignment function for the service; A second step of a mobile ISP subscriber requesting a subscriber authentication, IP address assignment, renewal, and release function to the RADIUS server through the wireless mobile packet network; And A third step in which the RADIUS server performs subscriber authentication, IP address allocation, renewal, and release functions requested by the mobile ISP subscriber and informs the mobile ISP subscriber of the result of the execution through the wireless mobile packet network; IP address management method of the Internet service provider subscriber using a RADIUS server comprising a. delete The method of claim 1, The subscriber authentication and IP address assignment request of the mobile ISP subscriber of the third step is An address assignment step of the RADIUS authentication server performing subscriber authentication on the authentication and IP address assignment request message transmitted from the mobile ISP subscriber, and then selecting a dynamic IP address and transmitting it to the mobile ISP subscriber through the wireless mobile packet network; A billing start step of transmitting, by the mobile ISP subscriber, a billing start request message to the RADIUS billing server using a dynamic IP address allocated in the address assignment step; And IP address of the Internet service provider subscriber using the RADIUS server including a charging response step of transmitting a response message to the mobile ISP subscriber through the wireless mobile packet network in response to the charging start request message received in the charging start step. How to manage. The method of claim 1, The renewal request for use of the IP address of the mobile ISP subscriber of the third step, An address update step of the RADIUS authentication server transmitting an authentication message transmitted from a mobile ISP subscriber and a response message for a dynamic IP address use update request message to the mobile ISP subscriber through the wireless mobile packet network; How to manage IP address of your subscriber. The method of claim 1, The termination request for the IP address of the mobile ISP subscriber of the third step is The RADIUS billing server, the release request step of generating a use release request message of a dynamic IP address for a charge termination request message sent from a mobile ISP subscriber and transmitting it to the RADIUS authentication server; The RADIUS authentication server which receives the use release request message of the dynamic IP address in the release request step, generates and sends a response message to release the use of the dynamic IP address to the RADIUS charging server; And In the release response step, when the RADIUS accounting server receives a response message from the RADIUS authentication server, the Internet using a RADIUS server includes a charging end step of generating a charging end response message for the use of a dynamic IP address and transmitting the same to a mobile ISP subscriber. How to manage IP address of service provider subscriber. A RADIUS authentication server that performs a procedure for verifying and determining the identity of subscribers accessing the system to manage authentication and billing in a home Internet Service Provider (ISP) network, and embeds the DHCP client function; The Remote Authentication Dial-In User Service (RADIUS) server, which includes a RADIUS billing server that grants the right to log in when the ISP is subscribed and manages the system fee addition, manages the address management of the dynamic IP. A first step of embedding a client function to a Dynamic Host Configuration Protocol (DHCP) server for the purpose; A second step of a mobile ISP subscriber requesting a subscriber authentication, IP address assignment, renewal, and release function to the RADIUS server through the wireless mobile packet network; When the RADIUS server transmits an address management request message to a DHCP server, the DHCP server performs an IP address allocation, update, and release function requested by the mobile ISP subscriber, and then the result of the execution of the RADIUS server through the wireless mobile packet network. Transmitting to the third step; And A fourth step of the RADIUS server informing the mobile ISP subscriber of the subscriber authentication result and the dynamic IP address management result through the DHCP server through the wireless mobile packet network; IP address management method of the Internet service provider subscriber using a RADIUS server comprising a. delete The method of claim 6, The mobile ISP subscriber of the second to fourth steps requests subscriber authentication and dynamic IP address assignment, The RADIUS authentication server may include an address assignment request step of transmitting, to the DHCP server, an authentication request message for mobile ISP subscriber and a dynamic IP address assignment transmitted through a wireless mobile packet network; An address assignment step of transmitting and receiving a message between the client / server for address assignment and the DHCP server, the DHCP server having received the dynamic IP address assignment request message through the address assignment request step; The RADIUS authentication server transmitting a result of notifying a mobile ISP subscriber of the dynamic IP address and subscriber authentication result assigned by the DHCP server through the address assignment step through the wireless mobile packet network; And The mobile ISP subscriber transmits a charging start request message to the RADIUS charging server through a wireless mobile packet network, and the RADIUS charging server transmits a response message for the charging start request message to the mobile ISP subscriber through a wireless mobile packet network. IP address management method of the Internet service provider subscriber using a RADIUS server comprising the step. The method of claim 6, The mobile ISP subscriber of the second to fourth steps may request to renew the use of the dynamic IP address. The RADIUS authentication server receiving an authentication and dynamic IP address update request message through the wireless mobile packet network, and transmitting an update request message of the dynamic IP address to the DHCP server; An address update response step of the DHCP server transmitting a response message to the RADIUS authentication server in response to the update request message of the dynamic IP address; And The RADIUS authentication server is a method of managing an IP address of an Internet service provider subscriber using a RADIUS server including a result of notifying a mobile ISP subscriber of a response message for authentication and update of a dynamic IP address. The method of claim 6, The mobile ISP subscriber of the second to fourth steps may terminate the use of the dynamic IP address. The RADIUS accounting server may include: a charging termination request step of transmitting a usage termination message of a dynamic IP address to the DHCP server for a charging termination request message of a mobile ISP subscriber transmitted through a wireless mobile packet network; The RADIUS billing server sends a release message of the dynamic IP address to the RADIUS authentication server, and the RADIUS authentication server sends a response message to the RADIUS billing server to respond to a release message of the dynamic IP address. step; And The RADIUS billing server is a method of managing an IP address of an Internet service provider subscriber using a RADIUS server comprising a result of informing a mobile ISP subscriber of a charge termination response message for dynamic IP use. When a mobile Internet service provider (ISP) subscriber accesses through a wireless mobile packet network, it performs a procedure to verify and determine the identity of the subscriber and to manage dynamic IP address allocation, renewal, and termination. A remote authentication dial-in user service (RADIUS) authentication server; And RADIUS billing server that grants you the right to log in to your ISP subscription and manages the addition of system fees. IP address management system of the Internet service provider subscriber using a RADIUS server comprising a. A DHCP server that performs address management functions for allocating, renewing use of, and terminating use of a dynamic IP address to a mobile Internet Service Provider (ISP) subscriber connected through a wireless mobile packet network; Remote Authentication Dial- User service for performing a client function to the DHCP server in response to a request for management of a mobile ISP subscriber's address in association with the DHCP server, and for verifying and determining the identity of the ISP subscriber. In User Service, RADIUS) authentication server, and A RADIUS server including a RADIUS billing server for linking with the RADIUS authentication server or a DHCP server, granting the right to log in when the ISP is joined, and managing the addition of a system fee; IP address management system of the Internet service provider subscriber using a RADIUS server comprising a.