KR101343651B1 - Method for connecting multiple wireless network using mobile authentication device - Google Patents

Abstract

The present invention relates to a multiple wireless network connection method of a mobile node using a removable authentication device, and more particularly, each authentication information and charging information for each wireless network to a mobile node such as a mobile terminal, a mobile router, a mobile access point, and the like. Using a removable authentication device equipped with a removable authentication device recorded therein so that the mobile node can simultaneously or selectively connect to different wireless networks (or different sub-networks) to support network mobility and multihoming. It is intended to provide a method of connecting a node to multiple wireless networks.

To this end, the present invention provides a method for connecting multiple wireless networks of a mobile node, wherein at least one or more access routers on different wireless networks each transmit a notification message to their communication area, where the mobile node is located at a specific location. In response to receiving the announcement message 1 from the access router 1 of the network 1, inquiring the authentication information 1 and the charging information 1 related to the network 1 recorded in the removable authentication device thereof; Performing, by the mobile node, a first authentication procedure / billing negotiation procedure by exchanging the inquired authentication information 1 and the charging information 1 with a home agent 1 that manages the network 1 through intermediation of the access router 1; A network 1 connection step of performing a binding update procedure with the home agent 1 and connecting to network 1 as the mobile node completes the first authentication procedure / billing negotiation procedure; When the mobile node moves to another location, it receives the announcement message 2 from the access router 2 of the network 2, and inquires the authentication information 2 and the charging information 2 of the network 2 recorded in its removable authentication device. Making; Performing, by the mobile node, a second authentication procedure / charging negotiation procedure by exchanging the inquired authentication information 2 and the charging information 2 with the home agent 2 that manages the network 2 through the intermediation of the access router 2; And a network 2 connection step of performing a binding update procedure with the home agent 2 to connect to the network 2 as the mobile node completes the second authentication procedure / billing negotiation procedure.

Mobile node, removable authentication device, authentication information, billing information, multiple wireless network connection, network mobility, multihoming

Description

Method for connecting multiple wireless network using mobile authentication device using removable authentication device

The present invention relates to a multiple wireless network connection method of a mobile node using a removable authentication device, and more particularly, each authentication information and charging information for each wireless network to a mobile node such as a mobile terminal, a mobile router, a mobile access point, and the like. Using a removable authentication device equipped with a removable authentication device recorded therein so that the mobile node can simultaneously or selectively connect to different wireless networks (or different sub-networks) to support network mobility and multihoming. The present invention relates to a multiple wireless network connection method of a node.

As mobile communication becomes commonplace and ubiquitous computing is put into practical use, studies for providing a mobile communication environment such as a home or an office are being actively conducted in moving vehicles such as automobiles and trains.

In a mobile network (IP network), a mobile terminal connected to a mobile router configures a network, manages mobility on a network basis, and a mobile IPv4 protocol or a mobile IPv6 protocol is used.

On the other hand, when a plurality of mobile nodes move at the same time (when the network moves in a group unit), a network mobility (NEMO) support protocol for mobility management has been discussed.

In addition, in order to solve the problem of using a single mobile router, a multi-homing technique that supports multiple connections is emerging. Here, conventional multihoming refers to a technology in which computers, servers, and the like on the Internet use multiple IP addresses to maintain multiple connections with homogeneous links or heterogeneous links, and set addresses or multiple interfaces for each of multiple IP prefixes. Implement multihoming by setting. This multihoming has advantages such as traffic transmission error prevention and traffic load balancing over a single network connection method.

However, in the related art, the necessity for network mobility support and multihoming implementation in a mobile IP network has been recognized, but a specific plan for this has not been proposed. For example, a technology for selecting different Internet service providers (ISPs) in a mobile IP network in a WLAN environment is developed.

In addition, although a lot of researches have recently been conducted to implement multi-homing in a mobile IP network, after a mobile terminal has been authenticated for network access through a home agent, a network connection scheme, for example, a binding update scheme between a mobile terminal and a home agent, may It is only being studied.

On the other hand, thanks to the recent development of wireless network technology, various wireless networks are being built around us, so that users can access various wireless network environments such as Wibro, High Speed Downlink Packet Access (HSDPA), etc. Wireless Internet such as WLAN, 2G, 3G, etc. can be used.

In addition, according to the recent network-to-terminal interworking technology, users can perform various tasks simultaneously or selectively, such as being able to participate in conferences through video conferencing while downloading high-speed mass movie content to their mobile terminals. .

However, in the wireless network environment commercialized so far, the user can access only a single wireless network provided by the service provider and is accommodated in various sub-networks by moving to various places according to network mobility. You are only connected to one subnetwork.

Therefore, in view of the ever-increasing user desires / needs, users may be able to download content more quickly and efficiently through different wireless networks or different sub-networks on the same network to download high-speed, large-capacity movie content. In other wireless network environments, there is an urgent need for a technology that enables content download through one wireless network and video conferencing through another wireless network.

Accordingly, the present invention has been proposed to solve the above problems and to meet the above requirements, and each authentication information and billing information for each wireless network to a mobile node such as a mobile terminal, a mobile router, a mobile access point, and the like. Using a removable authentication device equipped with a removable authentication device recorded therein so that the mobile node can simultaneously or selectively connect to different wireless networks (or different sub-networks) to support network mobility and multihoming. It is an object of the present invention to provide a method of connecting a node to multiple wireless networks.

The objects of the present invention are not limited to the above-mentioned objects, and other objects and advantages of the present invention which are not mentioned can be understood by the following description, and will be more clearly understood by the embodiments of the present invention. It will also be readily apparent that the objects and advantages of the invention may be realized and attained by means of the instrumentalities and combinations particularly pointed out in the appended claims.

In a first method according to a first embodiment of the present invention for achieving the above object, in a multiple wireless network connection method of a mobile node, at least one or more access routers on different wireless networks are advertised in their communication areas. Each message is transmitted, but when the mobile node is located in a specific place, the authentication information 1 and the billing information related to the network 1 recorded in its removable authentication device are received in response to the announcement message 1 from the access router 1 of the network 1. Querying information 1; Performing, by the mobile node, a first authentication procedure / billing negotiation procedure by exchanging the inquired authentication information 1 and the charging information 1 with a home agent 1 that manages the network 1 through intermediation of the access router 1; A network 1 connection step of performing a binding update procedure with the home agent 1 and connecting to network 1 as the mobile node completes the first authentication procedure / billing negotiation procedure; When the mobile node moves to another location, it receives the notification message 2 from the access router 2 of the network 2 and inquires the authentication information 2 and the charging information 2 of the network 2 recorded in its removable authentication device. step; Performing, by the mobile node, a second authentication procedure / charging negotiation procedure by exchanging the inquired authentication information 2 and the charging information 2 with the home agent 2 that manages the network 2 through the intermediation of the access router 2; And a network 2 connection step of performing a binding update procedure with the home agent 2 to connect to the network 2 as the mobile node completes the second authentication procedure / billing negotiation procedure.

On the other hand, in the second method according to the first embodiment of the present invention, in a method of connecting a multiple wireless network of a mobile node, at least one or more access routers on different wireless networks respectively transmit announcement messages to their communication areas. When the mobile node is located in a specific place, it receives the notification message 1 from the access router 1 of the network 1 and inquires the authentication information 1 and the charging information 1 of the network 1 recorded in its removable authentication device. step; The mobile node loads the inquired authentication information 1 and the charging information 1 in a binding update message, and transmits the authentication information 1 and the charging information 1 to a home agent 1 that is in charge of the network 1 through intermediation of the access router 1. A network 1 connection step of connecting to network 1 by performing a binding update procedure; When the mobile node moves to another location, it receives the notification message 2 from the access router 2 of the network 2 and inquires the authentication information 2 and the charging information 2 of the network 2 recorded in its removable authentication device. step; And the authentication information 2 and the charging information 2 which are inquired by the mobile node in the binding update message, and are transmitted to the home agent 2 which has jurisdiction over the network 2 through the intermediation of the access router 2 to perform a second authentication procedure / charging negotiation procedure. Network 2 connection step of connecting to the network 2 by performing the / binding update procedure.

On the other hand, in the first method according to the second embodiment of the present invention, in a method of connecting a multiple wireless network of a mobile node, at least one or more access routers on the same wireless network respectively transmit announcement messages to their communication areas. Inquiring the authentication information and the charging information of the wireless network recorded in the removable authentication device in response to receiving the announcement message 1 from the access router 1 of the sub-network 1 when the mobile node is located in a specific place. ; Performing, by the mobile node, a first authentication procedure / charging negotiation procedure by exchanging the inquired authentication information and charging information with a home agent that manages the wireless network through intermediation of the access router 1; A subnetwork 1 connection step of performing a binding update procedure with the home agent and connecting to sub network 1 as the mobile node completes the first authentication procedure / billing negotiation procedure; Inquiring the authentication information and the charging information of the wireless network recorded in the removable authentication device as the mobile node receives the announcement message 2 from the access router 2 of the sub-network 2 when the mobile node moves to another place. ; Performing, by the mobile node, a second authentication procedure / charging negotiation procedure by exchanging the inquired authentication information and the charging information with a home agent that manages the wireless network through intermediation of the access router 2; And a subnetwork2 connection step of performing a binding update procedure with the home agent to connect to the subnetwork 2 as the mobile node completes the second authentication procedure / billing negotiation procedure.

On the other hand, in the second method according to the second embodiment of the present invention, in the multiple wireless network connection method of the mobile node, at least one or more access routers on the same wireless network respectively transmit a notification message to its own communication area, Retrieving the authentication information and the billing information of the wireless network recorded in the removable authentication device when the mobile node receives the announcement message 1 from the access router 1 of the sub-network 1 when the mobile node is located in a specific place; The mobile node loads the requested authentication information and billing information in a binding update message and transmits the authentication information and billing information to a home agent that is in charge of the wireless network through mediation of the access router 1 to perform a first authentication procedure / charge negotiation procedure / binding update procedure. A subnetwork 1 connection step of connecting to the sub network 1 by performing a; Inquiring the authentication information and the charging information of the wireless network recorded in the removable authentication device as the mobile node receives the announcement message 2 from the access router 2 of the sub-network 2 when the mobile node moves to another place. ; And the mobile node carries the inquiry authentication information and the charging information in the binding update message, and transmits the authentication information and the charging information to the home agent in charge of the wireless network through the intermediation of the access router 2 to update the second authentication procedure / charging negotiation procedure / binding. Performing a procedure to connect to the sub-network 2;

As described above, the present invention enables mobile nodes such as mobile terminals, mobile routers, mobile access points, etc., to simultaneously or selectively connect to different wireless networks (or different sub-networks) to form multiple communication paths, and network mobility. And multihoming support.

In addition, the present invention has an effect that the mobile node is equipped with a removable authentication device in which each authentication information and charging information for each wireless network is recorded so that network connection authentication and charging negotiation can be efficiently performed.

In addition, the present invention has the effect that the mobile node in the region consisting of a variety of wireless network environment can provide advantages such as maintaining a seamless communication connection, improving bandwidth, selecting a network to meet the user's needs by multiple access to the wireless network .

BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings, It can be easily carried out. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a configuration diagram of one embodiment of a different wireless network to which the first embodiment of the present invention is applied.

As shown in FIG. 1, different wireless networks to which the first embodiment of the present invention is applied include a home agent 10, a binding cache 11, and an access router on network 1. A mobile terminal including a 1 (Access Router) 20, including a home agent 2 (30), a binding cache 2 (31), an access router 2 (40) on the network 2, and a removable authentication device (51) And 50.

In addition, the mobile terminal 50 is equipped with a plurality of heterogeneous wireless network interfaces (not shown) for different wireless network multiple access, the removable authentication device 51 and each authentication information for each wireless network and Billing information is recorded.

The different wireless networks may include at least one combination of wireless networks, such as Wibro, High Speed Downlink Packet Access (HSDPA), Wireless LAN (WLAN), 2G, 3G, and the like. .

In the first embodiment of the present invention, the mobile terminal 50 can simultaneously or selectively connect to different wireless networks based on the authentication information and the charging information of the removable authentication device 51 to support network mobility and multihoming. It is. Such a first embodiment of the present invention will be described in detail with reference to FIG. 2.

2 is a flowchart illustrating a method for connecting a multi-radio network to a mobile node using a removable authentication device according to a first embodiment of the present invention.

In the first embodiment of the present invention, when the network environment is a different wireless network, such as network 1, network 2, etc., the mobile terminal 50 is mobile (group-based mobile router or mobile terminal based mobile router that accommodates the mobile terminal). Mobile network 50 disconnects from the existing network 1 or connects to the network 1 that has been discovered, and then discovers a new network 2 according to the movement. It maintains its connection to 1 and simultaneously connects to the new network 2 to access the Internet.

The mobile terminal 50 performs the authentication procedure and the charging negotiation procedure based on the corresponding authentication information and the charging information of the removable authentication device 51 with the home agent in charge of the network in connecting to each wireless network. Perform the update procedure to complete the network connection. Here, the authentication information recorded in the removable authentication device 51 of the mobile terminal 50 includes each wireless network service name, a subscriber ID and password for each wireless network service, and the charging information includes each wireless network. Billing methods and billing criteria (e.g., per packet / hourly rate). As another example, when a subscriber subscribes to a wireless network service as a bundle product, the subscriber may include a bundled service name.

That is, each of the access router 1 20 and the access router 2 40 on each wireless network transmits a router advertisement message (RA; Router Advertisement) to its own communication area (201), and the mobile terminal 50 moves. If the router is located in a specific place according to the router to receive a router announcement message 1 from the access router 1 (20). Here, each of the access router 1 20 and the access router 2 40 on each wireless network carries wireless network identification information such as a wireless network service name belonging to the router announcement message and transmits them to its own communication area.

Then, the mobile terminal 50 recognizes that the mobile terminal 50 is located in the communication area of the network 1 by receiving the router advertisement message 1 [discovery of network 1 presence] and the authentication information 1 regarding the network 1 recorded in the removable authentication device 51; The billing information 1 is inquired (203). Here, the mobile terminal 50 recognizes that the mobile terminal 50 is located in the communication area of the network 1 through a wireless network service name such as the network 1 included in the router announcement message 1 received from the access router 1 20, and transmits to the removable authentication device. It is inquired whether the user subscribes to the wireless network service of the network 1 through the recorded authentication information.

Thereafter, the mobile terminal 50 confirms that it is subscribed to the wireless network service of Network 1, and thus authenticates the home agent 1 (10) with the home agent 1 (10) through the mediation of the access router 1 (20). The information 1 and the billing information 1 are exchanged to perform the authentication procedure and the billing negotiation procedure (204). That is, the mobile terminal 50 transmits and receives a subscriber ID, password, and billing information regarding the wireless network service of the network 1 to the home agent 1 10 through the intermediary of the access router 1 20, and performs the authentication procedure and billing. Negotiate procedures.

After the mobile terminal 50 receives the network 1 connection permission through the authentication procedure and the charging negotiation procedure, the mobile terminal 50 performs a binding update procedure with the home agent 1 10 to initiate internet communication. 205). For example, the mobile terminal 50 loads the temporary address 1 (CoA1) allocated from the home agent 1 (10) on the network 1 in a binding update message, thereby accessing the home agent 1 (10) through the access router 1 (20). ) And complete the binding update procedure by receiving a binding acknowledgement message from the home agent 1 (10).

Subsequently, when the mobile terminal 50 connects to the network 1 to use the Internet and is located in another place according to the movement, the mobile terminal 50 receives the router announcement message 2 from the access router 2 40 (211).

Then, the mobile terminal 50 recognizes that the mobile terminal 50 is located in the communication area of the network 2 by receiving the router advertisement message 2 [discovery of network 2 existence] and the authentication information 2 regarding the network 2 recorded in the removable authentication device 51; The billing information 2 is inquired (212). Here, the mobile terminal 50 recognizes that the mobile terminal 50 is located in the communication area of the network 2 through a wireless network service name such as network 2 included in the router advertisement message 2 received from the access router 2 40, and records it in the removable authentication device. It is to check whether the user is subscribed to the wireless network service of the network 2 through the authentication information.

Thereafter, the mobile terminal 50 confirms that it is subscribed to the wireless network service of network 2, and then authenticates the home agent 2 30 with the home agent 2 30 through the intermediation of the access router 2 40 on the network 2. Information 2 and billing information 2 are exchanged to perform authentication procedure and billing negotiation procedure (213). That is, the mobile terminal 50 transmits and receives a subscriber ID, password, and billing information regarding the wireless network service of the network 2 to the home agent 2 30 through the intermediary of the access router 2 40, and performs the authentication procedure and billing. Negotiate procedures.

After the mobile terminal 50 receives the network 2 connection permission through the authentication procedure and the charging negotiation procedure, the mobile terminal 50 performs a binding update procedure with the home agent 2 30 to initiate internet communication ( 214). In this case, when the mobile terminal 50 disconnects from the previously connected network 1 or maintains the connection with the previously connected network 1, the mobile terminal 50 maintains the connection with the network 1 and simultaneously connects to the new network 2 to start the Internet communication. do.

On the other hand, those skilled in the art can easily understand that the first embodiment of the present invention as described above may be applied to a removable authentication device in a mobile node such as a mobile router, a mobile access point, as well as a mobile terminal equipped with a removable authentication device. Could be.

In addition, the first embodiment of the present invention can be applied to a network configuration of a combination of a wireless network and a wired network as well as a different wireless network, and for this purpose, the wireless node and the wired network interface may be mounted in the mobile node.

Meanwhile, in the first embodiment of the present invention, after performing the authentication procedure and the charging negotiation procedure between the mobile node and the home agent on the wireless network as described above, the binding update procedure is performed or as another example, the binding update message is extended. That is, the mobile node may send the authentication information and the charging information together in the binding update message to the home agent to perform the authentication procedure, the charging negotiation procedure, and the binding update procedure at once.

Meanwhile, in the first embodiment of the present invention, as described above, the authentication procedure and the charging negotiation procedure are performed between the mobile node and the home agent on the corresponding wireless network, or as another example, a separate authentication / billing server is provided between the mobile nodes. You can also perform the authentication process and the negotiation of charging. Preferably, when the mobile node loads the authentication information and the billing information together in the binding update message and transmits the authentication information and the billing information to the home agent, the home agent forwards the authentication information and the billing information received from the mobile node to the authentication / billing server for authentication / billing. The server performs an authentication procedure and a charging negotiation procedure, and the home agent performs a binding update procedure for the mobile node when a valid mobile node authentication success response is received from the authentication / billing server.

Meanwhile, in the first embodiment of the present invention, when the mobile node is located in the new wireless network communication area as described above, the mobile node disconnects from the existing connected wireless network or maintains the connection with the existing wireless network. It connects to a wireless network and connects to the Internet. At this time, the mobile node shows the user the type of wireless network service that can be selected through an output interface (e.g. screen, speaker, etc.) for the user to select arbitrarily or according to a preset application characteristic. You can also programmatically let the mobile node choose.

3 is a diagram illustrating an embodiment of different sub-networks to which the second embodiment of the present invention is applied.

As shown in FIG. 3, different sub-networks to which the second embodiment of the present invention is applied include a home agent 60, a binding cache 61, an access router 1 71, an access router 2 72, and a removable type. It includes a mobile terminal 80 on which the authentication device 81 is mounted.

In addition, the mobile terminal 80 is equipped with a plurality of identical wireless network interfaces (not shown) for multiple access to each sub-network belonging to the same single wireless network, and the removable authentication device 81 relates to a wireless network. Authentication information and billing information are recorded.

In addition, the single wireless network may be configured as any one of wireless networks such as Wibro, High Speed Downlink Packet Access (HSDPA), wireless LAN (WLAN), 2G, 3G, and the like.

In the second embodiment of the present invention, the mobile terminal 80 is connected to each sub-network simultaneously or selectively based on the authentication information and the charging information of the removable authentication device 81 to support network mobility and multihoming. will be. Such a second embodiment of the present invention will be described in detail with reference to FIG. 4.

4 is a flowchart illustrating a method for connecting a multi-radio network to a mobile node using a removable authentication device according to a second embodiment of the present invention.

According to the second embodiment of the present invention, in the case of different sub-networks such as sub-network 1 and sub-network 2 constituting different external networks on a single wireless network, the mobile terminal 80 moves the mobile (mobile that accommodates the mobile terminal). Router-based group movement or mobile terminal itself movement], and then connect to the subnetwork 1 found to perform internet access. Subsequently, when the mobile terminal 80 discovers a new sub network 2 according to the movement, the mobile terminal 80 is connected to the existing network. It disconnects from the sub network 1 or maintains the connection with the previously connected sub network 1 and simultaneously connects to the new sub network 2 to perform internet access.

The mobile terminal 80 performs the authentication procedure and the charging negotiation procedure based on the authentication information and the charging information of the removable authentication device 81 with the home agent 60 that manages the corresponding sub networks in connection to each sub network. After completing the binding update procedure, complete the subnetwork connection. Here, the authentication information recorded in the removable authentication device 81 of the mobile terminal 80 includes a wireless network service name, a subscriber ID, a password, and the like, and the charging information includes a charging method and a charging standard for the wireless network ( For example, per packet / hourly rate).

That is, each of the access router 1 (71) and the access router 2 (72) on each sub-network is a router that includes wireless network identification information such as its sub-network prefix and wireless network service name in its communication area. Each Router Advertisement (RA) is transmitted (401), and the mobile terminal (80) is a Router Advertisement message including the subnetwork prefix 1 from the access router 1 (71) when located at a specific place according to the movement. Receive 1 (402).

Then, the mobile terminal 80 recognizes that it is located in the communication area of the sub-network 1 by receiving the sub-network prefix 1 [sub-network 1 existence discovery] and the authentication information and the charging information recorded in the removable authentication device 81. Inquire (403). Here, the mobile terminal 80 recognizes that it is located in the communication area of the sub network 1 of the corresponding wireless network through the wireless network service name and the sub network prefix 1 included in the router announcement message 1 received from the access router 1 71. Then, it is inquired whether the user subscribes to the service of the wireless network through the authentication information recorded in the removable authentication device.

Then, as the mobile terminal 80 confirms that it is subscribed to the corresponding wireless network service, through the intermediary of the access router 1 71 on the sub network 1, the home agent 60 and the inquired authentication information and billing. Information is exchanged to perform an authentication procedure and a billing negotiation procedure (404). That is, the mobile terminal 80 transmits and receives a subscriber ID, password, and billing information about the corresponding wireless network service to the home agent 60 through the intermediary of the access router 1 71 to perform the authentication procedure and the billing negotiation procedure. do.

After the mobile terminal 80 receives the subnetwork 1 connection permission through the authentication procedure and the charging negotiation procedure, the mobile terminal 80 performs a binding update procedure with the home agent 60 to initiate internet communication ( 405). For example, the mobile terminal 80 transmits the temporary address 1 (CoA1) allocated from the home agent 60 to the home agent 60 through the access router 1 71 by loading it in a binding update message. In response, the binding update procedure is completed by receiving a binding acknowledgement message from the home agent 60.

Subsequently, the mobile terminal 80 receives the router advertisement message 2 including the sub network prefix 2 from the access router 2 72 when the mobile terminal 80 connects to the sub network 1 to use the Internet and is located in another place according to the movement. (411).

Then, the mobile terminal 80 recognizes that the mobile terminal 80 is located in the communication area of the sub-network 2 by receiving the sub-network prefix 2 [sub-network 2 existence discovery] and the authentication information and the charging information recorded in the removable authentication device 81. Inquire (412). Here, the mobile terminal 80 recognizes that the mobile terminal 80 is located in the communication area of the sub network 2 of the corresponding wireless network through the wireless network service name and the sub network prefix 2 included in the router advertisement message 2 received from the access router 2 72. Then, it is inquired whether the user subscribes to the service of the wireless network through the authentication information recorded in the removable authentication device.

Then, as the mobile terminal 80 confirms that it is subscribed to the corresponding wireless network service, the home agent 60 and the inquired authentication information and billing through the intermediation of the access router 2 72 on the sub-network 2. Information is exchanged to perform the authentication process and the charging negotiation process (413). That is, the mobile terminal 80 transmits and receives a subscriber ID, password, and billing information about the corresponding wireless network service to the home agent 60 through the intermediary of the access router 2 72 to perform the authentication procedure and the billing negotiation procedure. do.

After the mobile terminal 80 receives the sub network 2 connection permission through the authentication procedure and the charging negotiation procedure, the mobile terminal 80 performs a binding update procedure with the home agent 60 to initiate internet communication. 414). In this case, when the mobile terminal 80 disconnects the previously connected subnetwork 1 or maintains the connection with the previously connected sub network 1, the mobile terminal 80 maintains the connection with the sub network 1 and simultaneously connects to the new sub network 2 to connect to the Internet. Start communication.

On the other hand, those skilled in the art can easily understand that the second embodiment of the present invention can be applied to a removable authentication device in a mobile node such as a mobile router, a mobile access point, as well as a mobile terminal equipped with a removable authentication device. Could be.

In addition, the second embodiment of the present invention can be applied not only to a single wireless network but also to a network configuration of a single wired network. For this purpose, a plurality of homogeneous wired network interfaces may be mounted in the mobile node.

Meanwhile, in the second embodiment of the present invention, after performing the authentication procedure and the charging negotiation procedure between the mobile node and the home agent on the wireless network as described above, the binding update procedure is performed or as another example, the binding update message is extended. That is, the mobile node may send the authentication information and the charging information together in the binding update message to the home agent to perform the authentication procedure, the charging negotiation procedure, and the binding update procedure at once.

Meanwhile, in the second embodiment of the present invention, as described above, the authentication procedure and the charging negotiation procedure are performed between the mobile node and the home agent on the corresponding wireless network, or as another example, a separate authentication / billing server is provided between the mobile nodes. You can also perform the authentication process and the negotiation of charging. Preferably, when the mobile node loads the authentication information and the billing information together in the binding update message and transmits the authentication information and the billing information to the home agent, the home agent forwards the authentication information and the billing information received from the mobile node to the authentication / billing server for authentication / billing. The server performs an authentication procedure and a charging negotiation procedure, and the home agent performs a binding update procedure for the mobile node when a valid mobile node authentication success response is received from the authentication / billing server.

Meanwhile, as described above in the second embodiment of the present invention, when the mobile node is located in the new subnetwork communication area, the mobile node is disconnected from the previously connected subnetwork or maintained at the same time while maintaining the connection with the previously connected subnetwork. It connects to the sub-network and performs internet access. At this time, the mobile node shows the user the sub-network type that can be selected through the output interface (e.g. screen, speaker, etc.) for the user to select arbitrarily or to set the program according to the preset application characteristics. It is also possible to let the mobile node make a selection.

Finally, the application service examples to which the first and second embodiments of the present invention described above are applied and their advantages will be briefly introduced.

The present invention provides for seamless handover of mobile terminals that handover between two access routers, wireless network allocation appropriate for each application having different access requirements, and bandwidth expansion by multiple wireless accesses simultaneously. There is an advantage, and when there is a user's request for various application services, there is an advantage in that it is possible to flexibly or selectively provide various application services corresponding to the user's needs by using the removable authentication device of the mobile terminal.

Meanwhile, the method of the present invention as described above can be written in a computer program. And the code and code segments constituting the program can be easily deduced by a computer programmer in the field. In addition, the written program is stored in a computer-readable recording medium (information storage medium), and read and executed by a computer to implement the method of the present invention. The recording medium may include any type of computer readable recording medium.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. The present invention is not limited to the drawings.

1 is a configuration diagram of one embodiment of different wireless networks to which the first embodiment of the present invention is applied;

2 is a flowchart illustrating a method for connecting a multi-radio network to a mobile node using a removable authentication device according to a first embodiment of the present invention.

3 is a diagram illustrating an embodiment of different sub-networks to which the second embodiment of the present invention is applied;

4 is a flowchart illustrating a method for connecting a multi-radio network to a mobile node using a removable authentication device according to a second embodiment of the present invention.

* Explanation of symbols on the main parts of the drawing

10: home agent 1 11: binding cache 1

20: access router 1 30: home agent 2

31: Binding Cache 2 40: Access Router 2

51: removable authentication device 50: mobile terminal

Claims (12)

In the multiple wireless network connection method of a mobile node, At least one or more access routers on different wireless networks each send announcement messages in their own area of communication, Inquiring the authentication information 1 and the charging information 1 related to the network 1 recorded in the removable authentication device in response to receiving the announcement message 1 from the access router 1 of the network 1 when the mobile node is located in a specific place. ; Performing, by the mobile node, a first authentication procedure / billing negotiation procedure by exchanging the inquired authentication information 1 and the charging information 1 with a home agent 1 that manages the network 1 through intermediation of the access router 1; A network 1 connection step of performing a binding update procedure with the home agent 1 and connecting to network 1 as the mobile node completes the first authentication procedure / billing negotiation procedure; When the mobile node moves to another location, it receives the notification message 2 from the access router 2 of the network 2 and inquires the authentication information 2 and the charging information 2 of the network 2 recorded in its removable authentication device. step; Performing, by the mobile node, a second authentication procedure / charging negotiation procedure by exchanging the inquired authentication information 2 and the charging information 2 with the home agent 2 that manages the network 2 through the intermediation of the access router 2; And Network 2 connection step of performing a binding update procedure with the home agent 2 as the mobile node completes the second authentication procedure / charging negotiation procedure; Multiple wireless network connection method of a mobile node using a removable authentication device comprising a. In the multiple wireless network connection method of a mobile node, At least one or more access routers on different wireless networks each send announcement messages in their own area of communication, Inquiring the authentication information 1 and the charging information 1 related to the network 1 recorded in the removable authentication device in response to receiving the announcement message 1 from the access router 1 of the network 1 when the mobile node is located in a specific place. ; The mobile node loads the inquired authentication information 1 and the charging information 1 in a binding update message, and transmits the authentication information 1 and the charging information 1 to a home agent 1 that is in charge of the network 1 through intermediation of the access router 1. A network 1 connection step of connecting to network 1 by performing a binding update procedure; When the mobile node moves to another location, it receives the notification message 2 from the access router 2 of the network 2 and inquires the authentication information 2 and the charging information 2 of the network 2 recorded in its removable authentication device. step; And The mobile node loads the requested authentication information 2 and the charging information 2 in the binding update message, and transmits the authentication information 2 and the charging information 2 to the home agent 2 which has jurisdiction over the network 2 through the intermediation of the access router 2. Network2 connection step to connect to Network2 by performing binding update procedure Multiple wireless network connection method of a mobile node using a removable authentication device comprising a. The method of claim 2, Each process of performing the first authentication procedure / charging negotiation procedure of the network 1 connection step and the second authentication procedure / charging negotiation procedure of the network 2 connection step, Each home agent forwards the corresponding authentication information and the billing information included in the binding update message received from the mobile node to the authentication / billing server so that the authentication / billing server performs the authentication procedure and the billing negotiation procedure. And a binding update procedure for the mobile node when a valid mobile node authentication success response is received from an authentication / billing server. 4. The method according to any one of claims 1 to 3, The network 2 connection step, Using the removable authentication device, the mobile node disconnects the previously connected network 1 and maintains the connection with the network 2 or maintains the connection with the previously connected network 1 and the network 2. How to connect multiple wireless networks of mobile nodes. 5. The method of claim 4, The mobile node is any one of a mobile terminal, a mobile router, and a mobile access point. 6. The method of claim 5, The mobile node is connected to multiple wireless networks of a mobile node using a removable authentication device, characterized in that a plurality of heterogeneous wireless network interface is mounted for multiple wireless network multiple access. In the multiple wireless network connection method of a mobile node, At least one or more access routers on the same wireless network each send announcement messages in their own communication area, Retrieving the authentication information and the charging information about the wireless network recorded in the removable authentication device when the mobile node receives the announcement message 1 from the access router 1 of the sub network 1 when the mobile node is located in a specific place; Performing, by the mobile node, a first authentication procedure / charging negotiation procedure by exchanging the inquired authentication information and charging information with a home agent that manages the wireless network through intermediation of the access router 1; A subnetwork 1 connection step of performing a binding update procedure with the home agent and connecting to sub network 1 as the mobile node completes the first authentication procedure / billing negotiation procedure; Inquiring the authentication information and the charging information of the wireless network recorded in the removable authentication device as the mobile node receives the announcement message 2 from the access router 2 of the sub-network 2 when the mobile node moves to another place. ; Performing, by the mobile node, a second authentication procedure / charging negotiation procedure by exchanging the inquired authentication information and the charging information with a home agent that manages the wireless network through intermediation of the access router 2; And Subnetwork2 connection step of performing a binding update procedure with the home agent to connect to subnetwork2 as the mobile node completes the second authentication procedure / billing negotiation procedure; Multiple wireless network connection method of a mobile node using a removable authentication device comprising a. In the multiple wireless network connection method of a mobile node, At least one or more access routers on the same wireless network each send announcement messages in their own communication area, Retrieving the authentication information and the charging information about the wireless network recorded in the removable authentication device when the mobile node receives the announcement message 1 from the access router 1 of the sub network 1 when the mobile node is located in a specific place; The mobile node loads the requested authentication information and billing information in a binding update message and transmits the authentication information and billing information to a home agent that is in charge of the wireless network through mediation of the access router 1 to perform a first authentication procedure / charge negotiation procedure / binding update procedure. A subnetwork 1 connection step of connecting to the sub network 1 by performing a; Inquiring the authentication information and the charging information of the wireless network recorded in the removable authentication device as the mobile node receives the announcement message 2 from the access router 2 of the sub-network 2 when the mobile node moves to another place. ; And The mobile node carries the inquiry authentication information and the charging information in the binding update message, and transmits the authentication information and the charging information to the home agent in charge of the wireless network through the intermediation of the access router 2 to perform a second authentication procedure / charge negotiation procedure / binding update procedure. Subnetwork 2 connection step of connecting to Subnetwork 2 by performing Multiple wireless network connection method of a mobile node using a removable authentication device comprising a. 9. The method of claim 8, Each process of performing the first authentication procedure / charging negotiation procedure of the sub-network 1 connection step and the second authentication procedure / charging negotiation procedure of the sub-network 2 connection step, The home agent forwards the authentication information and the billing information included in the binding update message received from the mobile node to the authentication / billing server so that the authentication / billing server performs the authentication procedure and the billing negotiation procedure. And a binding update procedure for the mobile node when receiving a legitimate mobile node authentication success response from a charging server. 10. The method according to any one of claims 7 to 9, The sub network 2 connection step, The mobile node disconnects the previously connected subnetwork 1 and maintains the connection with the sub network 2 or maintains the connection with the previously connected sub network 1 and the sub network 2. A method for connecting multiple wireless networks of a mobile node using a removable authentication device. 11. The method of claim 10, The mobile node is any one of a mobile terminal, a mobile router, and a mobile access point. The method of claim 11, The mobile node is connected to multiple wireless networks of a mobile node using a removable authentication device, characterized in that a plurality of wireless network interface for the multiple sub-network multiple access of the same wireless network is mounted.

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