KR100753845B1 - Method for supporting handover of mobile node having multiple interfaces in ip-based bcn - Google Patents

Abstract

A system and a method for supporting handover of a mobile terminal having a multi-interface in an IP(Internet Protocol)-based BcN(Broadband Convergence Network) are provided to minimize a loss of packets, prevent resource waste due to pre-reservation for resources, and reduce power consumption of the mobile terminal. A method for supporting handover of a mobile terminal having a multi-interface in an IP(Internet Protocol)-based BcN(Broadband Convergence Network) comprises the following steps. A core network mobility controller collects information about access routers and an access network. The mobile terminal senses handover and transmits its information to the current access network control unit. The access network control unit determines whether the handover is handover between networks or handover within the access network, and then secures a communication channel between an access router and an access point and mobile terminals. The core network mobility controller secures a communication channel after selecting an access network to which the mobile terminal will move.

Description

Method for supporting handover of a mobile terminal capable of multiple interfaces in an IP based broadband integrated mobile network environment and a system therefor {Method for supporting handover of mobile node having multiple interfaces in IP-based BcN}

1 is a diagram schematically illustrating a structure of a BcN integrated network to which an all-IP based heterogeneous access network to which the present invention is applied is combined.

2 is a diagram illustrating a heterogeneous network handover situation in an All-IP based mobile network structure according to an embodiment of the present invention.

3 is a flowchart illustrating a procedure performed when heterogeneous manganese handover is performed according to an embodiment of the present invention.

4 is a block diagram illustrating a configuration of a core network mobility controller.

5 is a block diagram illustrating a configuration of an access network controller.

6 is a diagram illustrating information managed by a location management controller of an access network controller.

7 is a diagram illustrating information managed by an information service controller of an integrated network mobility controller.

<Description of the reference numerals for the main parts of the drawings>

101,200: mobile terminal (MN with multiple interfaces)

102, 201: Correspondent Node (CN) communicating with the mobile terminal

103: IP based BcN (IP based core network)

104,105,106,107,108: Various access networks

210: access point (AP) in a WLAN access network

211: Node acting as AP in Wibro network

212: Node serving as AP in CDMA network

220,230,240,250: Routers in the access network

221,231,241,251: access network control unit (access network)

222,232,242,252: access network gateway

223,233,243,253: Various access networks

260,261,262,263: edge router

270: integrated network mobility control unit (CNMC)

280: Broadband Integrated Network (BcN)

290: user information provision server

The present invention provides seamless mobility of a mobile station (MN) in a Broadband Convergence Network (BcN) composed of various heterogeneous access networks based on All-IP (Internet Protocol), and provides multimedia, such as multimedia. The present invention relates to a method and system for effectively guaranteeing a quality of service (QoS).

The invention also communicates. broadcast. In the broadband convergence network (BcN), in which various access networks (access networks), such as the Internet, are integrated, GPS-based QoS is used to move between heterogeneous networks of mobile terminals using GPS-based location information (Vector). The present invention relates to a handover method and a system for ensuring a guarantee.

Broadband integrated network is communication. broadcast. It is a next-generation integrated network proposed to use the Internet-converged quality-assured broadband multimedia service anytime and anywhere without disconnection, and is based on IP-based CN (Core Network) and various types of access networks connected to the IP-based CN. It consists of Networks. Broadband convergence network (BcN) is a wireless network including WiBro (Wireless Broadband Internet), 3G / 4G (3 Generation / 4 Generation) mobile, Wi-Fi (Wireless Fidelity), and xDSL. (x Digital Subscriber Line) and Fiber To The Curb (FTTC) / Hybrid Fiber Coax (HFC), which includes cable subscribers, and Fiber To The Home (FTTH) / Fiber To The Office (FTTO) Likewise, it can be composed of various kinds of heterogeneous networks.

Therefore, in order to keep pace with the ubiquitous era, which aims to solve the limitation of the point of use (whenever) and the limitation of the use area (anywhere), the mobile terminal having a multi-interface in the BcN network is irrespective of the type of the network. What is needed is a way to provide Seamlees Handdover and ensure quality of service (QoS) to ensure seamless multimedia communications to meet users' demands for various service needs even when moving between different heterogeneous networks. Do.

When using mobile IP, the mobile terminal can maintain the same IP address even after handoff between heterogeneous access networks by using a home address managed through a home agent (HA). To provide a level of uninterrupted handover service. However, mobile IP may have a time delay due to mobility determination and signaling delivery, and there is a problem in that traffic is concentrated because HA intercepts a packet and delivers the packet to a mobile terminal.

In addition, since the basic Mobile IP is designed independently of the link layer below, after the L2 handoff is completed, it can be directly connected to the New FA (Foreign Agent) to communicate, and the mobile terminal cannot transmit or receive packets during the registration procedure. Have To solve the latter problem, there is MIPv4 Low Latency Handoffs (MIPv4-LLH) technology, IETF Internet Draft. This method allows the mobile terminal to communicate with the New FA while it is connected to the Old FA, and forwards the packets forwarded to the mobile terminal to the New FA before the registration process is completed to minimize delays during the handover procedure. This is how. However, this method has no way of knowing which New FA the mobile terminal will move to when there are several New FAs, and the Old FA should have information about all the FAs around it, and the mobile terminal has all this information. You have to decide where to go. In addition, in the case of heterogeneous networks, New FA should be determined in consideration of authentication methods, costs, services provided, and available resources. However, there is no method for managing such network information.

In addition, in order to receive a seamless handover service in a mobile network environment, it is required to reserve a suitable resource in advance in New AR to continuously receive the service. Resource reservation is used for this.

On the other hand, in a BcN environment in which all access networks are integrated, QoS signaling should be performed by an interface suitable for the selected network by predicting and selecting the most appropriate networks to which the mobile terminal will move. At this time, if pre-authentication function is added by predicting appropriate networks in advance, it will be able to support the seamless handover because it can solve the signaling overhead and latency problems that are commonly used in MIP.

Existing protocols proposed for such QoS signaling include RSVP (Resource ReSerVation Protocol), MRSVP, RSVP Tunnel, CORP, and Hierarchical Mobile RSVP (H-MRSVP).

RSVP is not designed in consideration of mobile network and is proposed for wired network and is not suitable for use in mobile network environment.

In the MRSVP scheme, in a mobile network environment in which resources are scarce, resources of a cell around a mobile terminal are reserved in advance, which inefficiently wastes resources in the access network, and dual resource reservation occurs because the reserved resources are not quickly released. In addition, it does not perform re-reservation by discovering CNMC or access network and unnecessarily at the end-to-end level between the sender and the mobile terminal or between the sender and the proxy agent. There is a disadvantage that resource reservation must be made.

The RSVP tunnel solves the problem that RSVP messages are not recognized between tunnel end points (ie, tunnel entry point and exit point), so that QoS can be provided even in the tunnel section. Implemented to However, the RSVP tunnel scheme does not have a method for quickly re-reserving resources when a handover of a mobile terminal occurs, and there is a problem in that resource re-scheduling must be made at an end-to-end level unnecessarily. There is no way to quickly discover CRNs and perform localized path repairs.

Meanwhile, the CORP provides QoS using a method of extending an existing RSVP path during handover, and uses a method called CRP (Concatenation for Reservation Path) to extend the RSVP path. However, the CORP also reserves resources of neighboring cells to which the mobile station will move in a mobile network environment where resources are scarce, and also opens an end-to-end RSVP session without using a node such as CNMC. This is wasted

Lastly, the H-MRSVP is a resource reservation protocol integrating a regional registration function of the RSVP and Mobile IP, and is a gateway mobility agent for intra-region handover. Re-reserving resources using a reservation tunnel between an Agent (hereinafter referred to as 'GMA') and a new Proxy Agent (hereinafter referred to as 'PA'). However, the H-MRSVP method performs resource reservation only when the handover delay time becomes long, such as inter-region handover, but there is also a problem in resource utilization rate due to passive reservation.

The biggest problem of these protocols is that they cannot make resource reservation between heterogeneous networks, and there is no way to know how much resource should be reserved by requesting some QoS, and also to predict and select an appropriate network. There is also no.

The technical problem to be achieved by the present invention has been proposed to solve the above problems, the location information (including vector information) obtained by using the GPS in the mobile terminal access network controller (ANC) and integrated network mobility Converged Networks Mobility Controller (CNMC) is used to predict the network to which the mobile terminal intends to move in advance, and the access network control unit and the broadband integrated mobility control unit transmit the network information to which the mobile terminal will move to the mobile terminal in advance and perform an authentication procedure. The prior procedure between the networks is performed before the mobile terminal performs the handover to provide a seamless handover method and system for guaranteeing QoS for real-time services when the mobile terminal moves between heterogeneous networks.

In order to achieve the above technical problem, a method for supporting handover of a mobile terminal capable of multiple interfaces in an IP-based broadband integrated mobile network environment according to the present invention is performed in an IP-based broadband integrated mobile network environment in which heterogeneous access networks are combined. 1. A method for supporting handover of a mobile terminal capable of performing the communication, the method comprising: collecting, by an integrated network mobility control unit, information about an access network constituting the access network and the access network; The mobile station detecting a handover and transmitting its information to an access network controller currently connected: whether the access network controller is a handover or an inter-network handover in an access network based on the information of the mobile terminal; Determining, by the access network controller, if the handover is determined to be a handover in an access network, securing a communication channel between the access router, the access point, and the mobile terminal that controls the position of the mobile terminal; And transmitting information of the mobile terminal to the integrated network mobility control unit if it is determined that the network is handovered, and wherein the integrated network mobility control unit selects an access network to which the mobile terminal will move to secure a communication channel based on the information. Characterized in that.

In order to achieve the above technical problem, a system for supporting handover of a mobile terminal capable of multiple interfaces in an IP-based broadband integrated mobile network environment according to the present invention may determine whether handover of a mobile terminal to which the mobile terminal is connected is performed. Decision based on the information of network nodes An access network controller; At least one connection with the access network control unit transmits data for handover to the mobile node and the access network control unit when the mobile station moves between networks, buffers the data transmitted to the mobile station, and then completes a new handover. Integrated network mobility control unit for transmitting to the access network; And a mobile terminal for accessing the access network with multiple interfaces.

Hereinafter, a method and a system for supporting handover of a mobile terminal capable of multiple interfaces in an IP-based broadband integrated mobile network environment according to the present invention will be described in detail with reference to the accompanying drawings. 1 is a diagram schematically illustrating a structure of a BcN integrated network to which an all-IP based heterogeneous access network to which the present invention is applied is combined. 2 is a diagram illustrating a heterogeneous network handover situation in an All-IP based mobile network structure according to an embodiment of the present invention. 3 is a flowchart illustrating a procedure performed when heterogeneous network handover is performed according to an embodiment of the present invention, and FIG. 4 is a block diagram illustrating a configuration of an integrated network mobility control unit (Core Network Controller). 5 is a block diagram illustrating a configuration of an access network controller, and FIG. 6 is a diagram illustrating information managed by a location management controller of the access network controller. FIG. 7 is a diagram illustrating information managed by an information service controller of an integrated network mobility controller.

Reference is first made to FIG. 1. As shown in FIG. 1, an IP-based core network (BcN) 103 which reserves and manages resources between various heterogeneous networks, manages and controls handovers of mobile terminals, and a plurality of various access networks 104 connected to the IP core network. 108), a mobile terminal 101 having multiple interfaces to support seamless handover in the various access networks as described above, and a corresponding terminal (CN) 102 communicating with the mobile terminal 101. . In this case, each of the access networks communicates with one or more mobile terminals 101. In addition, the IP core network (IP-base Core Networks) means a broadband integrated network, and manages the communication and resource allocation between each access network, and provides QoS guarantee and security (Security).

Meanwhile, a situation in which the present invention is applied is when the mobile terminal 101 communicates with one access network and a handover occurs to an area covered by another access network. 1 illustrates a case in which the mobile terminal 101 communicating with the access network 105 moves and communicates with the heterogeneous access network 107. In this case, the integrated network mobility control unit (CNMC) selects an appropriate access network before moving in advance and performs a preliminary work (reservation of resources, authentication, information of the selected network, etc. to the mobile terminal and preselects media) according to the access network. QoS provision and seamless handover can be provided.

FIG. 2 is a diagram illustrating the mobility structure of the IP-based broadband network of FIG. 1 in more detail. 2, it can be seen that the mobile terminal 200 has multiple interfaces to provide mobility between heterogeneous networks. The mobile station uses the AP 210 in the WLAN access network 223, the RAS 211 in the Wibro network 233, and the BTS 212 in the 3G / 4G network 243, respectively. 243 and 253, and each access network is connected to the integrated network mobility control unit (CNMC) 270. Each access network manages one or more control stations 210, 211, and 212, and the integrated network mobility control unit CNMC 270 manages one or more heterogeneous access networks 223, 233, 243, and 253.

In this case, the present invention may be applied when the mobile terminal 200 having multiple interfaces tries to handover to the same network or heterogeneous network. That is, when the mobile terminal 200 communicates with the corresponding terminal 201 in the WLAN access network and detects a handover through signal strength, the mobile terminal 200 transmits its location information including the vector information to the access network controller 1. And the access control unit 1 (221) checks whether the mobile terminal has a handover in its network by using the location information. If the handover to another network, the corresponding information is transmitted to the integrated network mobility control unit 270. In this case, the integrated network mobility control unit 270 (hereinafter referred to as "CNMC") selects a network in which the handover will occur and uses the user information providing server 290 in advance in the selected network before the handover of the mobile terminal occurs. The appropriate resources are reserved and pre-authentication procedures are made through the authentication server. At the same time, the mobile station can know information about the selected access network. Network configuration nodes not mentioned in FIG. 2 will be omitted by those skilled in the art to which the present invention pertains.

Referring to FIG. 3, a handover situation between heterogeneous networks and a signaling method according to handover in an IP-based broadband integrated network according to an embodiment of the present invention will be described. The CNMC requests all the access networks in advance to collect information on the access network (S301), and the access networks that have received the request are APs of each access network (in case of WLAN access network, AP, Wibro network, etc.). In case of RAS and 3G / 4G network, an AP information request message is transmitted (S302) in order to collect information on BTS). In response to the request, the AP (the AP in the WLAN access network, the RAS in the Wibro network and the BTS in the 3G / 4G network) transmits each piece of information to the access network controller (S304). The information is transmitted to the CNMC (S304) again (P300).

As described above, after the access network control unit and CNMC collect the corresponding information (P300), the mobile terminal having multiple interfaces detects that handover will occur through signal strength (P301), and detects GPS. Terminal information including the location information of the user is transmitted to the access network controller (S305 to S306). At this time, the access network controller receiving the information of the mobile terminal moves to which side the mobile terminal uses the location information (Vector) of the terminal and the information stored in the location management controller 401 of the access network controller (see FIG. 6). It is determined whether it is an intra-network or an inter-network handover by predicting whether or not (P302). If the network is a handover, the access network controller performs preliminary operations (reservation and pre-authentication) on the router and the access point (P303), and informs the mobile terminal of the information of the router and the access point to the mobile terminal, thereby providing a seamless handover. It is possible. At this time, the mobile terminal does not perform any other operation by recognizing the media of the mobile network, thereby extending the life of the battery.

When the access network controller determines that the access network is handovered in the process of determining whether the access network controller is in-network or inter-network handover (P302), that is, the location information (Vector) of the mobile terminal is examined. If it is predicted to go to another access network other than the information transmitted from the mobile terminal to the CNMC (S307). In this case, the CNMC previously selects a moving destination of the mobile terminal by using the corresponding terminal information and the information of the CNMC information service control unit 503, and uses the information provided by the user information providing server 290 and the information of the user profiles. Mapping all environments in the network to the environment of the new mobile network (for example, setting QoS level, changing authentication method, etc.) (P303). At this time, the criterion for selecting a mobile destination is to first select an access network to which the mobile terminal can move using location information of the mobile terminal including the vector information, and then to select a mobile network from the existing access network to support QoS for the service received by the mobile terminal. The new access network is selected in consideration of service provision, network resource utilization, and authentication method that can provide the received service. After the P303 process, data from the corresponding terminal to the mobile terminal is sent to both directions (New Network, Old Network) (P304). Since the new network buffers data in advance, it not only reduces packet loss due to fast handover, but also guarantees seamless handover with QoS.

In the next step, the CNMC informs the mobile terminal of a new access network and AP information (S308), and transmits terminal information, authentication information, and natural reservation information to the new access network (S309). In this case, the new access network proceeds with resource reservation to support pre-authentication for the mobile terminal and QoS for the existing mobile terminal (P305). When the mobile terminal moves to a new network, it not only enables to receive real-time services received from the previous network even after handover, but also performs more efficient and secure handoff authentication by performing the authentication procedure for the new network in advance. The delay due to authentication can be significantly reduced.

On the other hand, the mobile terminal that receives the information about the new network from CNMC can select the appropriate media directly based on the information, so it is not necessary to turn on the power for accessing the various interfaces, and to select the new network to move from the upper level. It can have the advantage of extending the battery life of the mobile terminal (P306).

In the next step, the mobile station performs handover and registers using the information of the new access network and the base station (RAS) received from the CNMC (S313), and sends a request message to the CNMC to disconnect the previous network ( S314 to S315), the CNMC receiving this is disconnected from the previous network (P307).

An embodiment of a configuration of a system supporting handover of a mobile terminal capable of multiple interfaces in an IP-based broadband integrated mobile network environment according to the present invention performing the above process will be described. 4 and 5 show the structure of the access network control unit and CNMC.

First, referring to the detailed structure of the access network controller 400, whether it is an intra-network or an inter-network handover using the location information (Vector) of the mobile terminal sent from the mobile terminal and information on service coverage of the APs connected to the access network. A location management controller 401 for determining a location of the network and selecting a location for handover in advance, an access network QoS manager 402 responsible for resource management of the access network, and an access network authentication controller 403 in charge of the authentication procedure of the access network. ) At this time, the important information stored in the location management control unit 401 is the same as FIG. That is, the ID includes the ID of the access node, the router ID, the ID of the access point, and two-dimensional data of the corresponding area.

Meanwhile, the detailed structure of the CNMC 500 will be described. First, information including a network selection unit 504 for determining which access network to move to, and a network location management control unit 505 for managing service jurisdiction information of access networks for selecting a network when it is determined to be handovered between networks. There is a service control unit 503. At this time, the representative information managed by the information service control unit 503 is as shown in FIG. That is, each access network has information about the ID of the access network, the two-dimensional data of the jurisdiction, the method of performing authentication, the resource information, the service provided, and the QoS providing method.

In addition, the core QoS control unit 501 manages the resources of the integrated network, the core authentication control unit 502 performs the authentication process of the integrated network. That is, a mobile terminal having multiple interfaces may perform intra-network and inter-network handover by using the QoS management unit 402, the access network authentication control unit 403, the core QoS control unit 501, and the core authentication control unit 502 of the access network. In this case, the authentication procedure is appropriately applied to the access network and the integrated network, and secure and efficient network resources are managed to guarantee the QoS of the mobile terminal.

In this case, the names of the components, such as the access network QoS management unit 402, access network authentication control unit 403, core QoS control unit 501, core authentication control unit 502, etc. used for the implementation of the present invention are different names. It is obvious that it can be used. In addition, important information managed by the access network control unit or CNMC may be further added to improve each function in the future.

The functions used in the devices and methods disclosed herein may be embodied as computer readable code on a computer readable recording medium. Computer-readable recording media include all types of recording devices that store data that can be read by a computer system. Examples of computer-readable recording media include ROM, RAM, CD-ROM, magnetic tape, floppy disks, optical data storage devices, and the like, which may also be implemented in the form of carrier waves (for example, transmission over the Internet). do. The computer readable recording medium can also be distributed over network coupled computer systems so that the computer readable code is stored and executed in a distributed fashion. And functional programs, codes and code segments for implementing the present invention can be easily inferred by programmers in the art to which the present invention belongs.

As described above, optimal embodiments have been disclosed in the drawings and the specification. Although specific terms have been used herein, they are used only for the purpose of describing the present invention and are not intended to limit the scope of the present invention as defined in the claims or the 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.

As described above, a method and a system for supporting handover of a mobile terminal capable of multiple interfaces in an IP-based broadband integrated mobile network environment according to the present invention include a mobile terminal having multiple interfaces in an IP-based broadband integrated mobile network environment. And when a handover between networks is to be performed, the mobile site (new access network and access router) to be handed over is predicted and selected in advance, and pre-working (pre-reservation of resources and pre-authentication) is executed at the same time. In order to minimize packet loss, when CNMC predicts handover, data is transferred bidirectionally to the previous location (formerly known as access network and access router) and mobile site (new access network and access router), and the mobile terminal After handing over, access to the previous location is blocked.

In this way, the mobile terminal receiving real-time service (multimedia service) is checked because the availability of resources at the new mobile site is checked in advance in consideration of the services previously received by the mobile terminal and the resources are reserved for the new access network and access router. Even if a handover occurs between heterogeneous networks, QoS for the existing service can be guaranteed and resource waste due to advance resource reservation can be effectively prevented in the conventional resource reservation method. In addition, by performing pre-authentication for the selected mobile location, it is possible to pre-process all the authentication process to be performed after the handover, so that the delay that can occur during handover can be significantly reduced, Since the authentication procedure is performed by mapping the authentication method to the authentication method of the mobile access network, seamless handover between heterogeneous networks can be supported.

In addition, when selecting another access network to be handed over, there is no need to compare all the access networks because the access network that has the possibility of handover is pre-selected by using the location information including the vector and the coverage area. Since the mobile terminal with multiple interfaces receives information about the new access network to be moved, the mobile terminal's energy is turned on because the mobile terminal turns on the link power for the specific media, rather than turning on the link power for all media connections. The consumption can be reduced considerably.

Claims (12)

In a method for supporting handover of a mobile terminal capable of multiple interfaces in an IP-based broadband integrated mobile network environment in which heterogeneous access networks are combined, (a) collecting, by a Core Network Mobility Controller, information on an access router constituting the access network and the access network; (b) the mobile terminal detecting handover and transmitting its information to an access network controller currently connected; (c) determining, by the access network controller, whether it is a handover or an inter-network handover in the access network based on the information of the mobile terminal: (d) if it is determined that the handover is within the access network, the access network control unit securing a communication channel between the access router, the access point, and the mobile terminal, which controls the position of the mobile terminal; And (e) transmitting information of the mobile terminal to the integrated network mobility control unit when it is determined that the network is handovered, and the integrated network mobility control unit selecting an access network to which the mobile terminal will move to secure a communication channel based on the information; A method for supporting handover of a mobile terminal capable of multiple interfaces in an IP-based broadband integrated mobile network environment comprising a. The method of claim 1, wherein the information of the mobile terminal is A method for supporting handover of a mobile terminal capable of multiple interfaces in an IP-based broadband integrated mobile network environment comprising current location information. The method of claim 1, wherein step (c) (c1) obtaining a location of the mobile terminal; (c2) referring to an access network ID to which the access point belongs, a router ID, an ID of the access point, and area information under the control of the access point; And (c3) selecting an access router and an access point for which a handover is expected based on the location of the mobile terminal and the information of the step (c2); and multiplexing in an IP-based broadband integrated mobile network environment. A method of supporting handover of an interface capable mobile terminal. The method of claim 1, wherein step (d) (d1) authenticating an access router and an access point in charge of a location to which the mobile terminal will move, and reserving resources; (d2) transmitting information on an access router and an access point authenticated in step (d1) to the mobile terminal; And (d3) buffering data transmitted to the access router and the access point authenticated in the step (d1), and immediately disconnecting the previously formed communication channel after handover when the handover occurs. A method for supporting handover of a mobile terminal capable of multiple interfaces in an IP-based broadband integrated mobile network environment. The method of claim 1, wherein step (e) comprises: (e1) selecting a network to which the mobile terminal will move based on the information of the mobile terminal and the network information; (e2) mapping a communication environment made in a previous access network with respect to the selected network to the mobile terminal; (e3) buffering data transmitted to the mobile terminal and transmitting the same to the previous access network and the selected network; (e4) transmitting the selected network information to the previous network, and transmitting the mobile terminal information and the resource reservation information to the selected network to instruct the predicted network to perform pre-authentication with the mobile terminal; And (e5) disconnecting the connection to the previous network when the mobile station selects a new media link and completes registration with the predicted network based on the received selected network information; A method for supporting handover of a mobile terminal capable of multiple interfaces in a mobile network environment. The method of claim 5, wherein the network information In the IP-based broadband integrated mobile network environment, the access network ID, the area information under the access network, the authentication method, the resource information, the service provided, and the QoS providing method are classified according to the access network. How to support handover of mobile terminal. The method of claim 5, wherein the communication environment A method for supporting handover of a mobile terminal capable of multiple interfaces in an IP-based broadband integrated mobile network environment, characterized in that it includes a Qos grade and an authentication method applied to the mobile terminal. The method of claim 5, wherein step (e1) Selecting the mobile network based on selection criteria including whether the mobile terminal has provided QoS for the service provided by the mobile terminal, network resource utilization, and an authentication method; A method for supporting handover of a mobile terminal capable of multiple interfaces in an IP-based broadband integrated mobile network environment. Determining whether or not the connected mobile terminal is handed over based on the location information of the mobile terminal and the information of the network nodes under its control An access network controller; When at least one connection with the access network controller is connected to transmit data for handover when the mobile terminal moves between networks to the mobile node and the access network controller, buffering the data transmitted to the mobile terminal and then handover is completed. Integrated network mobility control unit for transferring to a new access network; And And a mobile terminal having multiple interfaces to access the access network. A system supporting handover of a mobile terminal capable of multiple interfaces in an IP-based broadband integrated mobile network environment. The method of claim 9, wherein the access network control unit A location management controller that determines whether the handover of the mobile node is a handover or an inter-network handover in the access network based on the location information of the mobile node and jurisdiction area information of the access points located in the access network; A QoS management unit which performs resource management of the access network; And If it is determined that the handover is within the access network, authentication is performed for the access router and the access point to be moved, and in the case of inter-network handover, based on the information, authentication information, and resource reservation information of the mobile terminal provided by the integrated network mobility control unit. A system for supporting handover of a mobile terminal capable of multiple interfaces in an IP-based broadband integrated mobile network environment, comprising: an authentication controller configured to perform pre-authentication and resource reservation for the mobile terminal. 10. The method of claim 9, wherein the integrated network mobility control unit A network selector configured to select an access network to which the mobile node will move if the handover of the mobile node is determined to be a handover by the access network controller; A network location management control unit managing information including a jurisdiction area of the access networks and providing information at the request of the network selection unit; A core QoS control unit managing resources of the broadband integrated mobile network; A core authentication controller configured to perform authentication on an access network to which the mobile terminal is to move; And And a buffering unit for buffering the data transmitted to the mobile terminal and transferring the data to the access network and blocking the transfer to the previous access network when the handover is completed to the access network selected by the network selecting unit. A system supporting handover of a mobile terminal capable of multiple interfaces in an IP-based broadband integrated mobile network environment. In a method for supporting handover of a mobile terminal capable of multiple interfaces in an IP-based broadband integrated mobile network environment in which heterogeneous access networks are combined, (a) collecting, by an integrated network mobility control unit, information about an access router constituting the access network and the access network; (b) the mobile terminal detecting a handover and transmitting its information to the access network controller currently connected; (c) determining, by the access network controller, whether it is a handover or an inter-network handover in the access network based on the information of the mobile terminal: (d) securing a communication channel between the access router and the access point and the mobile terminal that controls the location to which the mobile terminal is to move if determined to be handover in an access network; And (e) transmitting information of the mobile terminal to the integrated network mobility control unit when it is determined that the network is handovered, and the integrated network mobility control unit selecting an access network to which the mobile terminal will move to secure a communication channel based on the information; A computer-readable recording medium having recorded thereon a program capable of executing a method for supporting handover of a mobile terminal capable of multiple interfaces in an IP-based broadband integrated mobile network environment.

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