KR20110007354A - Next generation network based global mobility management system and management method thereof - Google Patents

Abstract

PURPOSE: A global mobility providing system based on a next generation network and a method thereof are provided to integrally manage information of a mobile node in a core network area, thereby realizing continuous service use despite broad or local handoff in the mobile node. CONSTITUTION: A mobile terminal approaches a network through an access network(S10). Location information of the mobile terminal is checked by an MAG(Mobile Access Gateway) and an HCA(Handover Control Agent). The location information of the mobile terminal is registered by the MAG, the HCA, and an MICS(Mobile Information Control Server)(S30). Tunnel setup for packet transmission is performed by tunneling to the mobile terminal(S40). Connected nodes exchange data each other(S50).

Description

Next Generation Network Based Global Mobility Management System And Management Method Thereof}

The present invention relates to a next-generation network-based global mobility providing system and method for supporting global mobility. In particular, the present invention relates to a wide area handoff according to a movement from my access network to another access network and to a local handoff within an access network. The present invention relates to a network-based global mobility providing system and a method in a next-generation network environment that enables the guarantee of mobility of a mobile terminal.

Recently, a convergence network called Next Generation Network (NGN) has been developed worldwide, and a Broadband Convergence Network (BcN) based on Next Generation Network has been developed in Korea. The next generation communication network (NGN) and broadband integrated network (BcN) aims to fuse various types of data networks such as voice, data, multimedia, and broadcasting into one. In particular, the next generation communication network (NGN) and broadband integrated network (BcN) (hereinafter, referred to as next generation communication network and broadband integrated network) are free to connect and use freely regardless of time, place, computer or network with the realization of convergence network. Doing.

For such free access and guarantee, mobility support is essential for nodes connected to a network, for example, computers, broadcast receiving terminals, multimedia devices, electronic paper, mobile phones, and telephones. The mobility support technology for the Mobile Node (MN) in an Internet Protocol (IP) based network is the Internet Engineering Task Force (IETF) Mobile Internet Protocol (MIP). ) Is representative. Mobile IP has not fully functioned to date, and efforts have been made to solve this problem from various viewpoints.

As part of this effort, techniques for enabling fast location registration of mobile nodes (MNs) in the second layer (L2) area by applying the mobility technology of the third layer (L3) have been studied. It was filed on March 18, 2008 (Application No. 10-2008-0024909) entitled "Method and Apparatus for Supporting Node Mobility Using Layer and Three Layer Addresses". In the previous application (10-2008-0024909), an access network (AN) detects the entry of a mobile node (MN) in an access network (AN) area, secures its second layer (L2) address, and then establishes a wireless channel. (Access Point: AP), connects the Access Network (AN) and the IP Core Network (CON) in which the Access Point (AP), the information about the mobile node (MN) to access the access network There is a Handover Control Agent (HCA) that manages this.

However, in the conventional technology, handover between access networks (AN) connected by a core network (CON) is considered, but mobility in the access network (AN) area is not guaranteed.

Accordingly, an object of the present invention is network-based in a next-generation network environment that enables the mobility of the mobile terminal according to the wide area handoff according to the movement from one access network to the other access network and the local handoff inside the access network. It is to provide a global mobility providing system and method thereof.

In addition, another object of the present invention is to integrate and manage the information of the mobile node in the core network area, network-based in the next-generation network environment to enable continuous service use even if a wide area or local handoff occurs by the mobile node It is to provide a global mobility providing system and method thereof.

In order to achieve the above object, the next-generation network-based global mobility providing system according to the present invention provides a network-based global mobility in a wide area network including a mobile terminal, access networks connectable to the mobile terminal, and a core network integrating the access networks. A system, comprising: managing terminal information including a terminal ID of a mobile terminal connected through an access network, a home network prefix for location estimation of a mobile terminal, and route information for connecting with a mobile terminal, A first manager configured in the core network and having a mobile information control server for determining a data transmission path according to handoff between access networks; A plurality of handover control agents for controlling the data transmission according to the handoff in the access network of the mobile terminal, connecting the core network and the access network, and connected to the mobile information control server of the first management unit A second manager configured to form tunneling between different handover control agents according to the data transmission path of the first manager; And a third manager connected to the core network and the other access network by a handover control agent of the second manager and having a mobile access gateway constituting the access network.

The first manager processes the packet by a multiprotocol label switching technique.

In order to manage the information of the mobile node, the third manager may include terminal information including device ID of the mobile node, home address of the mobile node, and home network prefix information of the mobile node, and handover of the second manager. And a third management unit binding table in which a control agent interface address is recorded, when the mobile node accesses the access network, performs a second layer authentication with the mobile node, and displays a device ID of the mobile node on which the authentication has been performed. Transfer to the second management unit requests confirmation of registration and location registration of the mobile node.

The second manager may include a second manager part binding table in which a device ID of the mobile node, a home address of the mobile node, home network prefix information of the mobile node, and the mobile access gateway address of an access network to which the mobile node belongs. Check the second management unit binding table to update information according to the registration confirmation and location registration request from the third management unit, or request the first management unit to confirm the registration and location registration of the mobile terminal. .

The first management unit records the device ID of the mobile node, home prefix information of the mobile node, the handover control agent interface address to which the mobile node belongs, and information of the handover control agents that exchange packets with the mobile node. And a home network prefix assigned to the mobile node or not by registering the mobile node by searching the first manager binding table according to the registration confirmation and location registration request from the second manager. Provide information.

The first management unit notifies the second management unit that the new terminal is the new terminal when the mobile node is a first terminal accessing the access network, and when the mobile node is a previously registered terminal, the first management unit binds to the first management unit binding table. The recorded home prefix information of the mobile node is transmitted to the second management unit.

When the second manager is informed from the first manager that the mobile terminal is the new terminal, the second manager allocates a home network prefix for estimating the location of the mobile terminal, and assigns the allocated home network prefix information to the first manager and the first manager. It is delivered to the third management department.

The third management unit creates a router broadcast message in which the home network prefix information transmitted from the second management unit is recorded and delivers the same to the mobile node.

The handover control agent HCA0 of the second management unit transmits data to the target terminal MN belonging to another access network AN1 when the mobile terminal CN transmits data to the first management unit. (MN) requesting the location information, the first management unit searches the first management unit binding table according to the location information request, and transfers the searched location information to the handover control agent (HCA0) that requested the location information. And a handover request message for tunneling to the handover control agent HCA1 to which the destination terminal MN belongs, and the handover requesting the location information and the handover control agent HCA1 received the notification message. The control agent HCA0 forms tunneling for the transfer of data.

The handover control agent of the second management unit and the mobile access gate of the third management unit form tunneling for data transfer when the home network prefix of the mobile terminal is transmitted from the handover control agent.

In addition, the method for providing mobility according to the present invention comprises a mobile terminal, access networks connectable to the mobile terminal, and a core network integrating the access networks, and manages terminal information and route information for connection with the mobile terminal. A first manager having a mobile information control server for determining a data transmission path; It controls data transmission according to handoff in the access network of the mobile terminal, has a plurality of handover control agents, and forms tunneling with another handover control agent according to the data transmission path determination of the first management unit. A second management unit; And a third management unit having a mobile access gateway connected to the core network and the other access network by the handover control agent, wherein the mobile terminal comprises: a mobile terminal; Accessing the access network and performing a second layer authentication with the mobile access gateway; A location information checking step of confirming location information of the mobile terminal on which the second layer authentication is performed; A location registration step in which location information of the mobile terminal is registered in the first to third management units according to the location information confirmation: a tunneling setup step of setting up tunneling for transmitting data to the mobile terminal on which the location registration is made; And a data exchange step of exchanging data by tunneling formed by the setup.

In the location information checking step, the mobile access gateway creates a location registration message including a terminal ID and its address of the mobile terminal for which second layer authentication has been performed, and the created location registration message is handed over to the second management unit. Delivering to a control agent; And checking, by the handover control agent of the second management unit, receiving the location registration message, by searching for its own binding table, whether there is information in the mobile terminal. If the information of the terminal does not exist in the binding table of the second management unit, the handover control agent of the second management unit creates a registration request message and transmits the registration request message to the mobile information control server of the first management unit; And searching, by the mobile information control server of the first management unit for receiving the registration request message, information corresponding to the information of the mobile terminal recorded in the registration request message in its binding table. do.

The location information registration step, when the first management unit finds the information of the mobile terminal in the own binding table, extracts the home network prefix information of the mobile terminal recorded in the binding table, the extracted home network And generating a location registration response message recording the prefix information and transmitting the location registration response message to the second management unit.

The location information registration step, if the first management unit does not find the information of the mobile terminal in the binding table of the step, notifying the second management unit through the location registration response message that the mobile terminal is a new terminal: A second management unit receiving the location registration message assigns a home network prefix for the mobile node, and forwards the prefix update message to which the allocated home network prefix information is recorded to the first management unit; And updating, by the first management unit, the binding table by a prefix update message, and delivering an update response message to the second management unit.

The location registration step may include: transmitting, by the second manager, the home network prefix information to the third manager; And generating, by the third management unit, a router broadcast message recording the home network prefix information and delivering the same to the mobile terminal.

The location registration step includes the mobile terminal constructing its own address using the home network prefix information; Updating the address information to the first to third management units; transmitting, by the second management unit, the home network prefix information to the third management unit; And generating, by the third management unit, a router broadcast message recording the home network prefix information and delivering the same to the mobile terminal.

The tunneling setup step or the packet exchange by tunneling may include tunneling setup between the handover control agent of the second management unit that has transmitted and received the home network prefix information and the mobile access gateway of the third management unit. .

The tunneling setup step or the packet exchange by tunneling may include: transmitting, by the mobile node, the data to a mobile access gateway (MAG0) of an access network (AN0) to which the mobile node belongs; The mobile access gateway MAG0 transmits the data to the handover control agent HCA0 through tunneling between the handover control agent HCA0 of the second management unit and the mobile access gateway MAG0 of the third management unit. step; Confirming a destination address of the data by the handover control agent (HCA0) receiving the data and requesting location information on the mobile node of a destination from the first management unit; The first management unit checks the location information of the destination mobile node in its binding table and transmits the location information to the handover control agent HCA0 and transmits data to the handover control agent HCA1 to which the destination mobile node belongs. Informing that there is; And tunneling setup between the destination handover control agent (HCA1) and the location information request handover control agent (HCA0), and transmitting data from the location information request handover control agent (HCA0).

The tunneling setup step or the packet exchange step by the tunneling may receive the registration request message when the destination mobile terminal hands off the access network AN2 from the current access network AN1 during transmission of the data. Transmitting, by the first management unit, a notification message notifying a change of destination to handover control agents transmitting data to the mobile node; And handover control agents receiving the notification message form tunneling with the handover control agent AN2 of the access network AN2 to which the mobile node has handed off, and continuing data transmission. .

Network-based global mobility providing system and method in a next-generation network environment according to the present invention is the mobility of the mobile terminal according to the wide area handoff according to the movement from one access network to another access network and the local handoff in the access network Guarantee is possible.

In addition, the network-based global mobility providing system and method in the next-generation network environment according to the present invention to integrate and manage the information of the mobile node in the core network area, so that even if a wide area or local handoff occurs by the mobile node The service is available.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described to be easily carried out by those skilled in the art. In the accompanying drawings, it should be noted that the same reference numerals are used in the drawings to designate the same configuration in other drawings as much as possible. In addition, in describing the present invention, when it is determined that a detailed description of a related known function or known configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. And certain features shown in the drawings are enlarged or reduced or simplified for ease of description, the drawings and their components are not necessarily drawn to scale. However, those skilled in the art will readily understand these details.

1 is an exemplary configuration diagram illustrating a configuration of a next generation network-based global mobility providing system according to the present invention. Meanwhile, FIGS. 7 to 9 are exemplary diagrams illustrating the form of a binding table maintained by the mobility providing system of FIG. 1, and FIG. 7 is an exemplary diagram illustrating a binding table structure of a mobile access gateway, and FIG. 8 is a hand. FIG. 9 is an exemplary diagram illustrating a binding table structure of an over control agent. FIG. 9 is an exemplary diagram illustrating a binding table structure of a mobile information control server.

1 and 7 to 9, the global mobility providing system 100 according to the present invention includes a first manager 110, a second manager 130, a third manager 150, and a mobile node 170. It is configured to include.

The first management unit 110 is configured to include a Mobility Information Control Server (MICS, 115). The first manager 110 stores, maintains, updates, and manages various kinds of information necessary for providing mobility to the mobile node MN 170. In addition, the first management unit 110 supports global handoff, and for this purpose, by providing the location information of the mobile node (MN, 170) to the handover control agent (HCA, 135), the handover control agent (HCA). 135) to enable packet exchange through tunneling between them.

Specifically, the information managed by the first management unit 110 is the address of the mobile node (MN, 170), the handover control agent (HCA, the area of the access network (AN, 260) belonging to the mobile node (MN, 170) 135) Interface address, Mobile Access Gateway (MAG, 155) interface address of the access network (AN, 260) to which the mobile node (MN) belongs, Home network prefix of the mobile node (MN, 170) Information). Here, the address of the mobile node (MN) 170 may include a second layer address and a third layer address, and the third layer address may be IPv4 and IPv6 represented by an IP address. Layer 2 addresses may also include a Media Access Control Address (MAC) address and may additionally include a 3GPP2 International Mobile Station Identity And Connection ID, a 3GPP International Mobile Subscriber Identity, 64bit Global Id, EUI-64 or similar form. It may include an address and is not intended to limit the invention as presented.

In addition, the first management unit 110 supports the mobile terminal (MN, 170) of the mobile terminal (MN, 170) according to the mobile terminal (MN, 170) handoff or initial access to the mobile terminal (MN, 170) handoff or initial access. Determining whether or not the new 170, and transmits it to the handover control agent (HCA, 135). In addition, the first management unit 110 performs a registration process when the mobile terminal (MN, 170) first accesses the access network (AN, 260), and transmits the information of the mobile terminal (MN, 170) to its binding entry. Register and manage.

When the data transmission from the corresponding node CN, 180 to the mobile node MN 170 occurs, the first management unit 110 requests a handover control agent HCA0, 130 to which the corresponding node CN 180 belongs. Accordingly, the information on the handover control agent (HCA1, 130) to which the mobile node (MN, 170) belongs, that is, the location information of the mobile node (MN, 170) is provided. Through this, the corresponding node CN 180 may transmit a packet to the mobile node MN 170 via the handover control agent HCA 135.

Meanwhile, according to the present invention, the mobility provision system processes a packet using Multi Protocol Label Switching (MPLS), Generalized Multiprotocol Label Switching (Generalized MPLS), and an equivalent technique thereof. In this case, the multiprotocol label switch technology means that packet transmission is accelerated by omitting the path calculation of each packet and adding the path information in the form of a label.

The second management unit 130 serves to interlock the first management unit 110 and the third management unit 150, and comprises a handover control agent (HCA: HCA0 to HCA2, 130). The second management unit 130 registers the location information according to the new access or handoff of the mobile node (MN) 170 to the network, and is a terminal different from the mobile node (MN) 170, for example, a corresponding node ( The horn network prefix (MN_HNP) is allocated to enable communication between CNs (180). In addition, the mobile node MN 170 transmits and receives a packet through tunneling with the handover control agent HCA0 to which the corresponding node CN 180 to transmit and receive a packet belongs.

The second management unit 130 according to the update message transmitted from the mobile access gateway (MAG, 130) for the binding update of the mobile node (MN, 170) to the mobile node (MN, 115) to the mobile node (MN, Update the location information of 170). In addition, the handover control agent (HCA) 135 of the second management unit 130 generates its own binding entry when the location information of the mobile node (MN) 170 is updated by the mobile information control server (MICS) 115. After updating, the home network prefix (MN_HNP) is assigned to the mobile terminal (MN) 170 as necessary. Specifically, the handover control agent (HCA) 135 of the second management unit 130 is a mobile node (MN, 170) by a location report message (LRM) transmitted from the mobile access gateway (MAG, 155). Perform location registration. When the handover control agent (HCA) 135 of the second management unit 130 receives the location registration message (LRM), the handover control agent (HCA) retrieves its binding table and checks whether the information of the mobile terminal (MN) 170 having a registration request is registered. Check it. As a result of the check, when the mobile terminal MN 170 is a new access terminal, the handover control agent HCA 135 transmits a registration request message (RMM) to the mobile information control server MICS 115. In addition, the handover control agent (HCA) 135 receives a location registration response message (LRA) transmitted to the mobile information control server (MICS) 115 by a registration request message (RRM) to the mobile node (MN). After generating the binding entry for the (170), the home network prefix (MN_HNP) is assigned.

In addition, the handover control agent (HCA) of the second management unit 130 maps the interface information of the home network prefix (MN_HNP) and the third management unit 150, that is, the mobile access gateway (MAG, 155), the binding list It manages by, and transmits and receives packets through the tunneling with the mobile access gateway (MAG, 155) of the third management unit (130).

The third manager 150 is directly connected to the mobile node MN 170 to perform authentication and network registration of the mobile node MN 170 according to the access. In detail, the third manager 150 includes at least one mobile access gateway (MAG) 155 connected to the handover control agent (HCA) 135. An access network (AN) 260 is configured by the third management unit 150 and performs location registration of the mobile node (MN) 170 on the network in place of the mobile node (MN) 170. The mobile access gateway (MAG) 155 of the third management unit 150 updates its binding entry according to the location registration response message (LRA) and the prepiece update message (HNP_UM), and the handover control agent (HCA, 135). Form tunneling. The packet transmitted to the mobile node MN 170 is then transmitted by tunneling between the mobile access gateway MAG 155 and the handover control agent HCA 155.

The mobile node 170 is a terminal used by a user and is connected to a network through an access network (AN) 260. The mobile node 170 is connected to the mobile access gateway (MAG) 155 constituting the access network (AN) 260, and performs authentication and communication by the mobile access gateway (MAG) 155. The mobile node 170 is registered in the network by the mobile access gateway (MAG, 155) when accessing the access network (AN, 260), a router broadcast message from the mobile access gateway (MAG, 155) (Router Broadcast) Message: RBM) configures its own IP address. The mobile node (MN) 170 transmits its configured IP address to the first to third management units through a Home Address Update Message (HAUM), and each management unit (110, 130, 150). This message updates each binding entry and information. The mobile node (MN) 170 may be guaranteed local handoff through the handover control agent (HCA) 135 of the second management unit 130 and the mobile access gateway (MAG) 155 of the third management unit 150. In addition, the wide area handoff can be guaranteed by the mobile information control server (MICS) 115 of the first management unit 110.

Detailed mobility providing method of the next generation network-based global mobility providing system according to the present invention will be described in detail with reference to the following drawings.

2 is a flowchart illustrating a method for providing global mobility according to the present invention.

2, the global mobility providing method according to the present invention includes a second layer combining step (S10), a location information checking step (S20), a location registration step (S30), a tunnel setup step (S40), a groove and tunneling. Packet exchange step (S50).

 In the second layer combining step S10, the mobile terminal MN 170 accesses the network through the access network AN 260. In the second layer combining step (S10), the mobile terminal (MN) 170 accesses the mobile access gateway (MAG) 155 of the third management unit 150 constituting the access network (AN) 260, and the mobile access gateway. It is connected to the (MAG, 155) and the second layer (L2) authentication.

In the location information checking step (S20), after the connection between the mobile terminal (MN) 170 and the mobile access gateway (MAG, 155) is established through the second layer (L2) authentication, the mobile access gateway (MAG, 155) and handover are established. The location information of the mobile terminal MN 170 is confirmed by the control agent HCA 135. In this location information checking step (S20), a determination is made as to whether the mobile terminal (MN) 170 approaches the network for the first time or handoff, and the process of the location registration step (S30) proceeds differently according to the determination result. In the location information checking step (S20), the mobile terminal (MAG, 155), the handover control agent (HCA, 135), the handover control agent (HCA, 135) and the mobile information control server (MICS, 115) between the mobile terminal ( The location information confirmation process of the MN 170 is performed. In this process, each of the mobile access gateway (MAG) 155, the handover control agent (HCA) 135, and the mobile information control server (MICS, 115) checks its own binding entry so that the information of the mobile terminal (MN, 170) is stored. Determine if it exists. To this end, in the location information checking step (S20), the mobile access gateway (MAG) 155, which has been authenticated with the second layer (L2), has a terminal ID (MN_ID) and its interface address (MAG # 1) of the mobile terminal (MN, 170). A location registration message (LRM) including a) is transmitted to the handover control agent (HCA) 135. The handover control agent (HCA) 135, which has received the location registration message (LRM), has information on the same terminal as that of the mobile terminal (MN) 170 included in the location registration message (LRM) in its binding entry. You will be confirmed. As a result of the check, if information of the same terminal exists, the handover agent (HCA) 135 updates its binding information, and transmits a response message to the mobile access gateway (MAG) 155 to transmit the response message to the mobile terminal (MN) 170. Location registration is to proceed (S40). On the other hand, if the information of the mobile terminal (MN, 170) does not exist in the binding entry of the handover agent (HCA, 135), the handover agent (HCA, 135) is a mobile terminal in the mobile information control server (MICS, 115) It is requested to check the location information of (MN, 170).

The location registration step (S30) is performed by the mobile access gateway (MAG, 155), the handover control agent (HCA, 135) and the mobile information control server (MICS, 115) according to the result of the location information confirmation step (S20). The location information of the mobile terminal MN 170 is registered. This location registration step (S300) occurs when the mobile terminal (MN, 170) approaches the mobile access gateway (MAG, 155), the detailed procedure is different depending on the initial access and the connection by the handoff. When the mobile terminal (MN, 170) is connected to the network for the first time, the first to third management units 110, 130, and 150 check their binding entries and newly register, and the second management unit 130 performs the mobile terminal ( The home network prefix (MN_HNP) for the MN (170) is assigned and delivered to the mobile terminal (MN) 170, the first and third management units (110, 150). This location registration step is specified by the home network prefix delivery step (S30 ').

The home network prefix delivery step S30 ′ is a step of delivering a home network prefix MN_HNP allocated to the mobile terminal MN 170. This home network prefix delivery step S50 is performed before and after the tunnel setup step S50. Specifically, the home network privacy delivery step (S40) may be divided into a delivery step between the mobile access gateway (MAG, 155) to the mobile terminal (MN, 170) and the management unit (110, 130, 150). have. Delivery to the mobile terminal (MN, 170) is made after the tunnel setup step (S40), the transfer between the management unit (110, 130, 150) is made before the tunnel setup step (S40). In addition, the home network prefix delivery step (S30 ') is performed in connection with the location registration step (S30) described above. Specifically, when the mobile terminal (MN, 170) is connected by handoff, the home network prefix (MN_HNP) for the mobile terminal (MN, 170) is the mobile access gateway (MAG, 155) and the handover control agent (HCA, 135). By the request of the mobile information control server (MICS, 115) will be delivered to the lower management unit (130, 150). On the other hand, in the first connection, the handover control agent (HCA) 135 generates a home network prefix for the mobile terminal (MN, 170), and then the first and third management units (110, 150) and the mobile terminal (MN, 170).

Tunnel setup step (S40), when the location registration of the mobile terminal (MN, 170) is made, the tunnel setup for packet transmission is made by the tunneling to the mobile terminal (MN, 170). Tunneling refers to a method of transmitting data between heterogeneous networks, that is, communication networks using different communication protocols, such as next generation networks, and enables communication with communication networks that do not employ the communication protocols used in data packets. Do it. This tunnel setup is basically performed between the mobile access gateway (MAG) 155 and the handover control agent (HCA) after the location registration of the mobile terminal (MN, 170) is performed. It can be formed between control agents (HCAs) and used for packet exchange.

In the packet exchange step S50 by tunneling, data exchange between nodes MN, CN, 170 and 180 connected to the network is performed. In the packet exchange step S50, between the nodes MN, CN, 170 and 180 and the mobile access gateways MAG0, MAG1 and 155, the mobile access gateways MAG0, MAG1 and 155 and the handover control agents HCA0, HCA1, 135) Tunneling is formed between the handover control agents HCA0 and 135 and the handover control agents HCA1 and 135 so that packet exchange is performed. In addition, in the packet exchange step (S50), encapsulation and decapsulation are repeatedly performed at both ends of tunneling connecting the management units 130 and 150. In addition, tunneling between the handover control agent (HCA) 135 is made by the information provided by the mobile information control server (MICS, 115).

Hereinafter, the global mobility providing method of the present invention will be described in detail according to the initial registration and handoff situation.

3 is a flowchart illustrating an initial registration process according to an initial access of a mobile terminal.

Referring to Figure 3, the initial registration process according to the initial access of the mobile terminal is the second layer combining step (S100), location information checking step (S200), location registration step (S300), tunnel setup step (S400), address configuration It comprises a step (S600) and the home address update step (S700). The initial access step of the mobile terminal (MN) 170 may be considered to be configured by adding the address configuration step (S600) and the home address update step (S700) for the mobility providing method described above in FIG. Therefore, in the description of FIG. 3, a detailed description of the steps overlapping with FIG. 2 will be briefly described, and the details of the steps and additionally configured steps according to the initial approach will be described in detail. In addition, the packet exchange step by tunneling may not be performed during the initial registration process, and will be omitted in the description through FIG. 3 because it will be described through a separate drawing.

In the two-layer combining step (S100), as described above, the second layer (L2) authentication is performed between the mobile terminal (MN) 170 and the mobile access gateway (MAG1, 155) for the first access to the access network (AN, 260). By the second layer L2 authentication, the mobile terminal MN 170 and the mobile access gateways MAG1 and 155 form a communication channel in the second layer combining step S100.

In the location information checking step (S200: S200-1 to S200-3), a handover control agent (HCA1, 135) received a request from the mobile access gateways MAG1 and 155 and the mobile access gateways MAG1 and 155 in which two layers are combined. ) And the mobile information control server (MICS, 115) receiving the request of the handover control agent (HCA1, 135) performs the location information check of the mobile terminal (MN, 170). In this location information checking step (S200), the mobile information control server (MICS, 115), the handover control agent (HCA1, 135) and the mobile access gateway (MAG1, 155) check their binding entries in response to a request for the mobile terminal. If the information of the (MN, 170) is confirmed, and if the information is not confirmed, the host device requests the information confirmation of the mobile terminal (MN, 170). Specifically, the mobile access gateways MAG1 and 155 that have performed the two-layer combining S100 have their own interface address MAG # 1 and the device ID MN_ID of the mobile terminal MN 170. A registration message (LRM) is created and delivered to the handover control agent (HCA1, 135). The handover control agent (HCA1, 135) receiving the location registration message (LRM) checks whether there is information corresponding to the mobile terminal (MN, 170) included in the location registration message (LRM) in its binding entry. . 3, when the information of the mobile terminal (MN, 170) does not exist due to the initial access, the handover control agent (HCA1, 135) is the device ID (MN_ID) and its interface address (HCA # 1) Prepares a registered request message (RRM) and transmits it to the mobile information control server (MICS, 115). The mobile information control server (MICS) 115 searches for information corresponding to the mobile terminal (MN) 170 in its binding entry based on the information of the registration request message (RRM). In case of the first access, information corresponding to the mobile terminal (MN, 170) cannot be found in the binding entry of the mobile information control server (MICS, 115). In this case, the mobile information control server (MICS, 115) is a handover control agent. The location registration response message (LRA) is transmitted to HCA1 and 135 to inform that the device ID (MN_ID) is the new ID (New MN_ID). After that, the location registration step S300 is performed.

In the location registration step (S300: S300-1 to S300-5), the location registration is performed according to the mobile terminal (MN, 170) first access to the network in the location information verification step (S200). The handover control agent (HCA1, 135) confirming that the ID (MN_ID) of the mobile terminal (MN, 170) is a new ID (New MN_ID) in the location information checking step (S200) is a home for the mobile terminal (MN, 170). Network prefix (MN_HNP) is assigned. This home network prefix (MN_HNP) is information for estimating the IP of the area where the mobile terminal (MN, 170) exists, and is used as route information for visiting the mobile terminal (MN, 170). When the home network prefix (MN_HNP) is assigned, the handover control agents (HCA1, 135) create a prefix update message (HNP_UM) in which the home network prefix (MN_HNP) information is recorded, and then the mobile information control server (MICS, 115). To pass on. The mobile information control server (MICS) 115 adds and records the home network prefix (MN_HNP) information along with the mobile terminal (MN, 170) information to its binding entry by using the prefix update message (HNP_UM). In addition, the handover control agent (HCA1, 135) records the home network prefix (MN_HNP) information in the location registration response message (LRA) and delivers it to the mobile access gateway (MAG1, 155). The mobile access gateway (MAG1, 155) updates the binding entry for the mobile terminal (MN, 170) based on the received home network prefix (MN_HNP) information, and creates tunneling with the handover control agent (HCA1, 135) ( S400). In addition, the mobile access gateways MAG1 and 155 include the home network prefix (MN_HNP) information in the router broadcast message (RBM) and transmit it to its cell area.

In the tunnel setup step (S400), packet exchange is performed between the handover control agent (HCA) 135 and the mobile access gateway (MAG, 155) provided with the home network prefix (MN_HNP) information from the handover control agent (HCA) 135. Forming tunneling for. After that, all packets coming to the mobile terminal (MN) 170 are transmitted through this tunneling.

In the address configuration step (S600), the mobile terminal (MN, 170) that receives the router broadcast message (RBM) for which the home network prefix (MN_HNP) is fed from the mobile access gateway (MAG) 155 is the home network prefix (MN_HNP). You will build your own unique address, for example IP. The assignment of addresses then follows the IPv6 standard.

In the home address update step (S700: S700-1, S700-2), the mobile terminal (MN, 170) includes the address information configured in the address configuration step (S600) in the home address update message (HAUM) and the mobile access gateway (MAG). , 155), handover control agent (HCA) 135, and mobile information control server (MICS) 115 to transmit their own address information to the first to third management units 110, 130, and 150.

Through this process, initial registration is performed, and then packet exchange is performed by a handoff and packet transmission procedure which will be described later in the drawings.

4 is a flowchart illustrating a packet transmission procedure for a mobile terminal when initial registration is completed.

The flowchart shown in FIG. 4 details the packet exchange step S60 by tunneling in FIG. In FIG. 4, a description will be made on the assumption that a source terminal to which a packet is to be transmitted is a correspondent terminal (CN) 180 and a destination of a packet is a mobile node (MN) 170.

Referring to FIG. 4, the packet transmitted from the correspondent node CN 180 is transferred to the third management unit mobile access gateway MAG0 and 155 of the access network AN0 and 260 corresponding to the home area of the correspondent node CN 180. Is transmitted (S601). Upon receiving the packet, the third manager mobile access gateway (MAG0, 155) encapsulates the packet (S603) and tunnels to the second manager handover control agent (HCA0, 135) (S605). Upon receiving the tunneled packet, the second management unit handover control agents HCA0 and 135 decapsulate the packet (S607) to confirm the destination address of the packet. The second management unit handover control agent (HCA0, 135) that checks the destination address of the packet requests the location information requesting the location information of the mobile node (MN) 170 to the first management unit mobile information control server (MICS, 115). A message (Location Req: REQ) is transmitted (S609). At this time, the second management unit handover control agent (HCA0, 135) is buffering the packet until receiving a response from the first management unit mobile information control server (MICS, 115). Meanwhile, the first management unit mobile information control server (MICS) 115 receiving the location information request message (REQ) checks the destination address included in the location information request message (REQ), that is, the address of the mobile node (MN) 170. The mobile node (MN) 170 is searched for by referring to its binding table. When the location of the mobile node MN 170 is retrieved, the first management unit mobile information control server MICS 115 transmits a location information response message RES to the second management unit handover control agent HCA0 and 135. On the other hand (S613), the notification message for tunneling with the handover control agent (HCA0, 135) side corresponding to the node (CN, 180) corresponding to the handover control agent (HCA1, 135) of the area to which the mobile node (MN, 170) belongs ( Location Notif: NOT) is transmitted (S611). This notification message NOT establishes a tunnel setup between the handover control agents HCA0 and 135 of the corresponding node CN and the handover control agents HCA1 and 135 of the mobile terminal MN170. You lose.

On the other hand, the second management unit handover control agent (HCA0, 135) receiving the location information response message (RES) from the first management unit mobile information control server (MICS, 115) encapsulates the buffering packet (S615), Transmitting to the mobile terminal (MN, 170) handover control agent (HCA1, 135) through the tunneling formed by the setup (S617). The mobile terminal (MN, 170) handover control agent (HCA1, 135) decapsulates the packet received by tunneling (S619) to confirm the destination address (S619), and again encapsulates (S621) The mobile node MN 170 transmits tunneling through a tunnel set up with the mobile access gateways MAG1 and 155 to which it belongs (S623). The third management mobile access gateway (MAG1, 155) decapsulates the tunneled packet (S625), and delivers it to the mobile node (MN, 170) (S627).

5 is a flowchart illustrating a location registration procedure when a global handover situation occurs in a mobile terminal.

Referring to FIG. 5, the access procedure according to the global handover situation of the mobile terminal follows the mobility providing method described with reference to FIG. 2. Specifically, in the global handover situation, location information of the mobile terminal (MN) 170 is updated according to a simplified procedure by the initial registration procedure.

When the mobile terminal (MN) 170 accesses another access network (AN2, 260) by performing a global handover, the second layer authentication is performed through the mobile access gateway (MAG2, 155) closest to the third management unit (S101). .

When the second layer authentication is performed, the third management unit mobile access gateway (MAG2, 155) is a location registration message (LRM) for location registration of the mobile terminal (MN, 170) to the second management unit handover control agent (HCA2, 135) ) Is transmitted (S201-1).

The second management unit handover control agent (HCA2, 135) receiving the location registration message (LRM) searches its own binding table, and there is no matching information. The message RRM is transmitted (S201-2).

The first management unit mobile information control server (MICS, 115) checks its binding table according to the registration request message (RRM) and confirms that there is a binding entry registered for the mobile terminal (MN, 170). . After confirming the binding entry, the first management unit mobile information control server (MICS) 115 extracts the home network prefix (MN_HNP) information from the binding entry, and then the second management unit handover control agent (HCA2, 135) through the location registration response message (LRA). ) To be delivered (S301-1).

The second management unit handover control agent (HCA2, 135) generates a new binding entry for the mobile node (MN, 170) using the location registration response message (LRA), and generates a location registration response message (LRA) to the third management unit. It transmits to the mobile access gateway (MAG2, 155), and informs the home network prefix (MN_HNP) (S301-2).

Meanwhile, even in this case, a tunnel for packet transmission is set up between the second management unit handover control agent (HCA2, 135) and the third management unit mobile access gateway (MAG2, 155) (S401).

In addition, the third management unit mobile access gateway (MAG2, 155) receiving the location registration response message (LRA) creates a router broadcast message (RBM) including the home network prefix (MN_HNP) to the mobile node (MN, 170). To pass. At this time, since the mobile node (MN) 170 receives its own home network prefix (MN_HNP) information, which is allocated in the initial registration, the mobile node (MN) 170 does not recognize the movement of the network, and the mobile node (AN1, 260) It can be regarded as a network connection, providing continuous service to users.

6 is a flowchart illustrating a packet transmission procedure in a global handoff situation.

Referring to FIG. 6, the packet transmission procedure under the global handoff situation is very similar to the packet transmission procedure according to FIG. 4. However, the path of the packet transmitted to the access network (AN1, 260) before the handoff should be changed according to the handoff.

While the packet is being delivered, as shown in FIG. 4, when a registration request message (RRM) is received from the second management unit handover control agent (HCA2, 135), the first management unit mobile information control server (MICS) 115 sets its own binding table. The search checks whether a binding entry related to the mobile node (MN) 170 exists. When it is confirmed that a binding entry for the mobile node (MN) 170 exists, the first management unit mobile information control server (MICS) 115 updates the location information of the mobile node (MN) 170 recorded in its binding entry. do. In addition, the first management unit mobile information control server (MICS, 115) checks the second management unit handover control agent (HCA, 135) information stored in the binding entry to transmit a packet to the mobile node (MN, 170) After confirming all the handover control agents (HCA, 135) and delivers a notification message (NOT) to them (S553, S554). All handover control agents (HCA) 135 receiving the notification message (NOT) release the existing tunneling and tunnel with the handover control agent (HCA2, 135) in the area handed over by the mobile node (MN, 170). Set up to send the packet.

Meanwhile, FIGS. 7 to 9 illustrate the binding table structure of each management unit. FIG. 7 illustrates the binding table structure of the third management unit mobile access gateway, and FIG. 8 shows the binding of the second management unit handover control agent. 9 is an exemplary diagram illustrating a binding table structure of the first management unit mobile information control server (MICS) 115.

As shown in FIG. 7, the mobile access gateway (MAG) 155 has the device ID (MN_ID), home network prefix (MN_HNP), handover control agent interface address, and mobile of the mobile node (MN) 170 in its binding table. The node's home address (MN_HoA) is recorded and managed.

As shown in FIG. 8, the handover control agent (HCA) 135 has a device ID (MN_ID), a home network prefix (MN_HNP), a mobile access gateway interface address, and a mobile node of its mobile node (MN) 170 in its binding table. It binds and manages the node's home address (MN_HoA), and determines whether a device ID (MN_ID) is present in the binding table to create or update a node.

As shown in FIG. 9, the first management unit mobile information control server (MICS) 115 may include a device ID (MN_ID), a home network prefix (MN_HNP), a handover control agent interface address, and a mobile node of the mobile node (MN) 170. By binding the information of all handover control agents (HCA) 135 that exchange packets with the MN 170, the packet data may be rerouted during global handover.

1 is a configuration example showing a configuration of a next-generation network-based global mobility providing system according to the present invention according to the present invention.

2 is a flow chart illustrating a method for providing global mobility according to the present invention.

3 is a flowchart illustrating an initial registration process according to an initial access of a mobile terminal.

4 is a flowchart illustrating a packet transmission procedure for a mobile terminal when initial registration is completed.

5 is a flowchart illustrating a location registration procedure when a global handover situation occurs in a mobile terminal.

6 is a flow chart illustrating a packet transfer procedure under a global handoff situation.

7 to 9 are exemplary views showing the shape of a binding table maintained by the mobility providing system of FIG.

7 is an exemplary diagram illustrating a binding table structure of a mobile access gateway.

8 is an exemplary diagram illustrating a binding table structure of a handover control agent.

9 is an exemplary diagram illustrating a binding table structure of a mobile information control server.

Claims (19)

A network-based global mobility providing system in a wide area network comprising a mobile terminal, access networks connectable to a mobile terminal, and a core network integrating the access networks, Manages terminal information including a terminal ID of a mobile terminal connected through an access network, a home network prefix for estimating a location of the mobile terminal, and route information for connection with a mobile terminal, and a hand between the access networks of the mobile terminal. A first manager configured in the core network and having a mobile information control server for determining a data transmission path according to an off state; Controlling a data transmission according to handoff in the access network of the mobile terminal, connecting the core network and the access network, and connecting a plurality of handover control agents connected to the mobile information control server of the first management unit. A second manager configured to form tunneling between different handover control agents according to the data transmission path of the first manager; A third management unit connected to the core network and the other access network by a handover control agent of the second management unit and having a mobile access gateway constituting the access network; Based global mobility providing system. The method of claim 1, The first management unit is a next generation network-based global mobility providing system, characterized in that for processing the packet by the multi-protocol label switching technology. The method of claim 1, In order to manage the information of the mobile node, the third manager may include terminal information including device ID of the mobile node, home address of the mobile node, and home network prefix information of the mobile node, and handover of the second manager. Has a third management part binding table in which the control agent interface address is recorded; When the mobile node accesses the access network, performs a second layer authentication with the mobile node, The next generation network-based global mobility providing system, characterized in that the device ID of the mobile node, the authentication is performed to the second management unit to request the registration and location registration of the mobile node. The method of claim 3, wherein The second manager may include a second manager part binding table in which a device ID of the mobile node, a home address of the mobile node, home network prefix information of the mobile node, and the mobile access gateway address of an access network to which the mobile node belongs. Has, Check the second management unit binding table to update the information according to the registration confirmation and location registration request from the third management unit, or update the information or request the first management unit to confirm the registration and location registration of the mobile terminal. Next-generation network-based global mobility providing system. The method of claim 4, wherein The first management unit records the device ID of the mobile node, home prefix information of the mobile node, the handover control agent interface address to which the mobile node belongs, and information of the handover control agents that exchange packets with the mobile node. Has a first management unit binding table, Next generation, characterized in that for searching the first management unit binding table in accordance with the registration confirmation and location registration request from the second management unit to provide the registration or registration of the mobile node or the home network prefix information assigned to the mobile node. Network-based global mobility providing system. The method of claim 5, The first management unit If the mobile node is a new terminal accessing the access network for the first time, it notifies the second management unit that the new terminal, And the home prefix information of the mobile node recorded in the first manager binding table is transmitted to the second manager when the mobile node is a previously registered terminal. The method of claim 6, The second management unit If the first management unit is notified that the mobile terminal is the new terminal, Assign a home network prefix for the location estimation of the mobile terminal, And delivering the allocated home network prefix information to the first management unit and the third management unit. 8. The method according to claim 6 or 7, The third management unit The next generation network-based global mobility providing system, characterized in that for generating a router broadcast message recorded with the home network prefix information delivered from the second management unit and forwarded to the mobile node. The method of claim 5, The handover control agent HCA0 of the second management unit is When the mobile terminal CN transmits data to the target terminal MN belonging to another access network AN1, it requests the first management unit for location information of the target terminal MN. The first management unit searches for the first management unit binding table according to the location information request, and transfers the searched location information to the handover control agent HCA0 requesting the location information, wherein the destination terminal MN belongs to the target terminal MN. Deliver a notification message for tunneling to the handover control agent (HCA1), And the handover control agent (HCA1) that has received the notification message and the handover control agent (HCA0) requesting the location information form tunneling for data transmission. The method of claim 7, wherein The handover control agent of the second manager and the mobile access gate of the third manager provide tunneling for data transfer when the home network prefix of the mobile terminal is transmitted from the handover control agent. system. A mobile information control server comprising a mobile terminal, access networks connectable to a mobile terminal, and a core network integrating the access networks, and managing terminal information and path information for connection with the mobile terminal and determining a data transmission path. The first management unit having a; It controls data transmission according to handoff in the access network of the mobile terminal, and has a plurality of handover control agents and performs tunneling with other handover control agents according to the data transmission path decision of the first management unit. Forming a second management unit; And a third management unit having a mobile access gateway connected to the core network and the other access network by the handover control agent, the mobility providing method according to the next generation network-based global mobility providing system. A coupling step of the mobile terminal accessing the access network to perform second layer authentication with the mobile access gateway; A location information checking step of confirming location information of the mobile terminal on which the second layer authentication is performed; Location registration step of registering the location information of the mobile terminal to the first to third management unit in accordance with the location information confirmation: A tunneling setup step of setting up tunneling for transmitting data to the mobile terminal in which the location registration is made; And And a data exchange step of exchanging data by tunneling formed by the set-up. The method of claim 11, The location information checking step, Generating, by the mobile access gateway, a location registration message including a terminal ID and its address of the mobile terminal for which second layer authentication has been performed, and delivering the created location registration message to a handover control agent of the second management unit; And And checking, by the handover control agent of the second management unit that received the location registration message, its own binding table to confirm the presence or absence of information on the mobile terminal. If the information of the mobile terminal does not exist in the binding table of the second management unit in the information existence step, the handover control agent of the second management unit creates a registration request message and controls the movement information of the first management unit. Delivering to a server; And The mobile information control server of the first management unit receiving the registration request message retrieves information corresponding to the information of the mobile terminal recorded in the registration request message in its binding table. Mobility providing method by the next generation network-based global mobility providing system, characterized in that. 13. The method of claim 12, The location information registration step When the first management unit finds the information of the mobile terminal in the binding table of its own, Extracting home network prefix information of the mobile terminal recorded in the binding table, creating a location registration response message recording the extracted home network prefix information, and delivering the location registration response message to the second management unit; Mobility providing method by next generation network based global mobility providing system. 13. The method of claim 12, The location information registration step If the first management unit does not find the information of the mobile terminal in its binding table, notifying the second management unit through a location registration response message that the mobile terminal is a new terminal: A second management unit receiving the location registration message assigns a home network prefix for the mobile node, and forwards the prefix update message to which the allocated home network prefix information is recorded to the first management unit; And Providing mobility by the next generation network-based global mobility providing system, characterized in that the first management unit comprises updating the binding table by a prefix update message, and forwarding an update response message to the second management unit. Way. The method according to claim 12 or 14, wherein The location registration step Transmitting, by the second manager, the home network prefix information to the third manager; And And generating, by the third management unit, a router broadcast message in which the home network prefix information is recorded and delivering the same to the mobile terminal. 2. The mobility providing method of the next generation network-based global mobility providing system. The method of claim 15, The location registration step Configuring, by the mobile terminal, its own address using the home network prefix information; Updating the address information to the first to third management units; transmitting, by the second management unit, the home network prefix information to the third management unit; And And a third management unit creating a router broadcast message in which the home network prefix information is recorded, and delivering the same to the mobile terminal. 2. The method of claim 15, The tunneling setup step or the packet exchange step by the tunneling And performing tunneling setup between the handover control agent of the second management unit that has transmitted and received the home network prefix information and the mobile access gateway of the third management unit. Next generation network-based global mobility providing system, comprising: Method of providing mobility by. The method of claim 17, The tunneling setup step or the packet exchange step by the tunneling Transmitting, by the mobile node, the data to a mobile access gateway (MAG0) of an access network (AN0) to which the mobile node belongs; The mobile access gateway MAG0 transmits the data to the handover control agent HCA0 through tunneling between the handover control agent HCA0 of the second management unit and the mobile access gateway MAG0 of the third management unit. step; Confirming a destination address of the data by the handover control agent (HCA0) receiving the data and requesting location information on the mobile node of a destination from the first management unit; The first management unit checks the location information of the destination mobile node in its binding table and transmits the location information to the handover control agent HCA0 and transmits data to the handover control agent HCA1 to which the destination mobile node belongs. Informing that there is; Tunneling setup between the destination handover control agent (HCA1) and the location information request handover control agent (HCA0), and transmitting data from the location information request handover control agent (HCA0). Mobility providing method by the next generation network-based global mobility providing system, characterized in that. The method of claim 18, The tunneling setup step or the packet exchange step by the tunneling When the destination mobile terminal handoffs the other access network AN2 from the current access network AN1 during transmission of the data, Delivering, by the first management unit, the reception request message, a notification message informing of a destination change to handover control agents transmitting data to the mobile node; And The handover control agents receiving the notification message form a tunneling with the handover control agent (AN2) of the access network (AN2) handed off by the mobile node, and continuing the data transmission; Mobility providing method by next generation network based global mobility providing system.

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