KR100898180B1 - Network-based mobility management method in mobile communication system - Google Patents

Abstract

The present invention relates to a method for providing network-based mobility in a mobile communication system.

In the present invention, the access service network gateway (Access Service Network-GateWay, ASN-GW) is the anchor mobility corresponding to the terminal from the authenticator after the authentication procedure and pre-provisioned service flow setting procedure at the initial access of the terminal is completed The PMIP6 procedure is performed to provide network-based mobility to the terminal by taking management information.

In addition, when a handover occurs between the ASN-GW, the anchor ASN-GW receiving the anchor data path handover triggering request of the target ASN-GW deletes the previously established PMIP6 tunnel, and thus the target ASN-GW Create a new PMIP6 tunnel to provide network-based mobility.

PMIP6, Mobile WiMAX, Access Services Network Gateway, Mobility, Network-Based Mobility

Description

Network-based mobility management method in mobile communication system {Network-based mobility management method in mobile communication system}

The present invention relates to a network-based mobility providing method in a mobile communication system. In particular, the present invention relates to a method for providing network-based mobility in the event of a handover between an initial access and an access service network gateway.

Mobile communication systems based on IEEE802.16e, such as the Mobile World Interoperability for Microwave Access (Mobile WiMAX) system, provide seamless Internet services to mobile users. Such a mobile communication system is based on a cell-based mobile communication structure, and supports a handover to continuously maintain a service without interruption even when a terminal in service enters another cell area due to a location movement. .

In such a mobile communication system, handover is an access that does not involve renewal of a care-of address (CoA) of a mobile IP (MIP) even when a handover between access service network gateways (ASN-GW) occurs. Access Service Network (ASN) -Anchored Handover and Connectivity Service Network (CSN) -Anchored Handover with CoA Update and Performs MIP Function do.

In particular, the Internet Engineering Task Force (IETF) defines Proxy Mobile IPv6 (PMIP6) technology as a network-based mobility providing method that can be applied to CSN-anchored handover of such a mobile communication system. In case of providing mobility to UE through PMIP6 technology defined in IETF, information necessary for performing PMIP6 procedure from authentication server (Authentication, Authorization, Accounting, AAA) through authentication process at the time of initial access and at handover The PMIP6 procedure is performed by the media access gateway (MAG) that has received the request.

Therefore, even if ASN-GW handover occurs until the authenticator is changed for fast handover, the ASN-anchor does not perform the authentication process with the AAA or before the CSN-Anchor handover is performed. In the case of a mobile communication system in which hand handover is performed to guarantee service continuity using a path extension method, a method of triggering a PMIP procedure when performing handover between ASN-GWs is needed.

In addition, since the procedure for setting the pre-provisioned service flow is performed after the authentication of the terminal is finished, the PMIP6 procedure is performed during the initial access of the terminal. You need a new triggering method to trigger this.

An object of the present invention is to efficiently provide network-based mobility when an initial access of a terminal or a handover occurs between an access service network gateway in a mobile communication system.

According to an aspect of the present invention for achieving the above object, a method in which an access service network gateway provides network-based mobility at initial access of a terminal,

Acquiring anchor mobility management information of the terminal from an authenticator entity when setting of the authentication procedure and pre-provisioned service flow for the terminal is completed; And providing network-based mobility to the terminal through performing a proxy mobility IP procedure based on the anchor mobility management information.

In addition, in a mobile communication system including a home agent according to another aspect of the present invention, when a handover occurs between a first gateway, which is a current gateway, and a second gateway, which is a previous gateway, the terminal is the first gateway. To provide network-based mobility to

Performing a first handover in association with the second gateway; If a triggering message of a second handover is received from a target access service network functional entity, sending the received triggering message to the second gateway; And when the first data path is deleted between the second gateway and the home agent, providing network-based mobility to the terminal by performing a proxy mobility IP procedure associated with the home agent.

In addition, in the mobile communication system according to another aspect of the present invention, the recording medium on which the structure of the anchor mobility management information is recorded,

A mobility mode field in which mobility mode information indicating one of a plurality of mobility modes including proxy mobility IP version 6 is recorded; And a proxy mobile IP version 6 information field in which information necessary for a proxy mobile IP version 6 procedure performed for providing network-based mobility is recorded.

According to an aspect of the present invention, an initial access method of a terminal and a handover method between ASN-GWs in a mobile communication system include an authentication procedure and a pre-provisioned service flow setting procedure at the initial access of a terminal. After performing the method, the present invention provides a method of efficiently triggering the PMIP6 procedure, and a method of efficiently triggering the PMIP6 procedure when a handover occurs between ASN-GWs. Accordingly, by efficiently triggering the PMIP6 procedure when the terminal initially accesses or when a handover occurs between the ASN-GWs, the mobile communication system effectively provides network-based mobility.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification.

Throughout the specification, when a part is said to "include" a certain component, it means that it can further include other components, without excluding other components unless specifically stated otherwise. In addition, the term “… entity” and the like described in the specification means a unit for processing at least one function or operation, which may be implemented by hardware or software or a combination of hardware and software.

In this specification, a mobile station (MS) is a mobile terminal (MT), a terminal (terminal), a subscriber station (SS), a portable subscriber station (PSS), a user device (User Equipment). It may also refer to a user equipment (UE), an access terminal (AT), and the like, and may include all or some functions of a terminal, a mobile terminal, a subscriber station, a portable subscriber station, a user device, an access terminal, and the like.

In the present specification, a base station (BS) may refer to an access point (AP), a wireless access station (Radio Access Station, RAS), a mobile multihop relay (MMR) -BS, or the like. It may also include all or part of the functions of an access station, a base transceiver station, an MMR-BS, and the like.

Hereinafter, an initial access method and a handover method for providing network-based mobility according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a structural diagram of a mobile communication system according to an embodiment of the present invention as a network, and illustrates a mobile world interoperability for mobile access (Mobile WiMAX) system as an example.

Meanwhile, although an embodiment of the present invention describes a mobile WiMAX system as a mobile communication system as an example, the present invention may be applied to other mobile communication systems.

Referring to FIG. 1, the mobile communication service network includes an access service network (ASN) 100 and a connectivity service network (CSN) 200.

The MS 110 is a mobile terminal having mobility and receives a wireless packet data service by accessing a BS 120 which is a base station apparatus through a wireless channel. BS 120 is a device for connecting a wired network and a wireless network, and controls a wireless channel and is connected to a wired network to provide a wireless packet data service directly to the MS (110).

Access Service Network Gateway (ASN-GW) 130 provides authentication / key distribution, handover relay, data path and service flow delegation, IPv6 access router functionality, proxy mobility IP version 6 (Proxy Mobile IPv6, PMIP6) performs a Media Access Gateway (MAG) function, etc., and interoperates with the authentication server (Authentication, Authorization, Accounting, AAA) 220 for user authentication. In general, one ASN-GW area becomes one IP subnet and has a structure in which it is connected to the CSN and directly connected to the public Internet 300. This, including the BS 120 and the ASN-GW 130 is called ASN.

Meanwhile, the CSN 130 includes a home agent / local mobility anchor (HA / LMA) 210 and an AAA 220. The HA / LMA 210 is connected to the MS 110 with Client Mobile IPv4 (CMIP4), Proxy Mobile IP Version 4 (Proxy Mobile IPv4, PMIP4), Client Mobile IP Version 6 (CMIP6), Proxy Mobile IP Agent function to provide Mobile IP service such as version 6 (PMIP6). The AAA 220 performs authentication, authority verification, and billing functions of the subscriber of the mobile communication system, and manages profile information of the subscriber and provides subscriber profile information to the ASN-GW 130 at the time of authentication.

2 illustrates the distribution of functional entities between the ASN-GW 130 and the BS 120 in the mobile communication system according to an embodiment of the present invention, and illustrates the distribution of functional entities related to mobility.

As shown in FIG. 2, the MS 110 wirelessly communicates with the BS 120 through an R1 reference point, and the BS 120 and the ASN-GW 130 communicate with each other through an R6 reference point. . Reference points are symbolized to indicate the interface between nodes, that is, the data path.

The R6 reference point is composed of a control unit (not shown) and a bearer unit (not shown), and the bearer unit constitutes a data path between the BS 120 and the ASN-GW 130, and the control unit according to the mobility of the MS 110. Controls the establishment, update, and release of data paths.

The ASN-GW 130 communicates with the CSN, that is, the HA / LMA 210, the AAA 220, and the like through the R3 reference point, and communicates with the other ASN-GW 130 through the R4 reference point. The R3 reference point includes a control unit for interworking with the AAA 220 and mobility support, and a bearer unit for user data packet transmission. The R4 reference point consists of a control unit and a bearer unit required for communication between functional entities for supporting mobility of the MS 110.

The functional entities related to mobility among the functional entities of the BS 120 illustrated in FIG. 2 include a data path function (DPF) 121, a handover function 122, and a context function. (123) There is an entity.

The data path function entity 121 is directly connected to the MS 110 to transmit a user packet to the MS 110 and the ASN-GW 130, and serves or serves during handover. ) To set and delete data paths. The handover function entity 122 is an entity that controls the overall handover message. The handover function entity 122 is divided into a serving and a target to determine a handover. The context function entity 123 performs a function of obtaining context information necessary for handover through a context server.

Among the functional entities included in the ASN-GW 130, the functional entities related to mobility include a data path function (DPF) entity 131, a handover function entity 132, and a context function entity (Context). Function, Authenticator 133, PMIP Client entity 134, Authenticator entity 135, Service Flow Authorization (SFA) entity 136, Mobile IP Visit Agent IP Foreign Agent (MIP FA) entity 137, MIP Access Router (MIP AR) 138, and PMIP6 MAG functional entity 139.

The data path function entity 131 communicates directly with the data path function entity 121 of the BS 120 and performs an anchor (anchor data path) or relay (relay data path) function during handover. The handover functional entity 132 performs the function of relaying the handover message to the serving or target handover functional entity. The context function entity 133 performs a function of transmitting context information of the MS 110 according to a request of the context function entity 123 located in the BS 120. In addition, the PMIP client entity 134 performs a client function for PMIP4, and the authenticator entity 135 performs a function of generating an authentication key using the authentication information and the profile information of the MS 110. The service flow delegation entity 136 also performs the function of managing the service flow of the MS 110. The MIP visit agent entity 137 performs a visit agent function for CMIP4. The IP6 access router entity 138 performs an IPv6 access router function, and the PMIP6 MAG function entity 139 performs a client function for performing a PMIP6 procedure.

Meanwhile, other entities of the BS 120 and the ASN-GW 130 in addition to the above-described entities may be easily implemented by those skilled in the art as well-known technical details, and thus, detailed description thereof will be omitted.

3 is a flowchart illustrating an initial access method for providing network-based mobility in a mobile communication system according to an embodiment of the present invention.

In the following, it is responsible for the data path (anchor DPF) associated with the MS 110, the anchor function of the service flow delegation (anchor SFA), the PMIP6 MAG function, and the IP6 access router function (IP6 AR) when the MS 110 is initially connected. ASN-GW is named "Anchor ASN-GW".

Referring to FIG. 3, the MS 110 accesses a network to receive a mobile communication service and performs access authentication (S101).

Through the authentication procedure, the AAA 220 stores the authentication key required for the mobile communication service, and user profile information such as quality of service (QoS) profile information and mobility-related information, along with the anchor Authenticator entity. 1) to pass. At this time, the AAA 220 is required information for performing the PMIP6 procedure, that is, the mobility mode (MS Mobility Mode) of the MS (110), MS Network Access Identifier (MS NAI) of the MS 110, local mobility Information including an anchor (Local Mobility Anchor, LMA) address, MS-Home Network Prefix (MS-HNP) of the MS 110 is also included and transmitted.

Meanwhile, in the embodiment of the present invention, a case in which the anchor authenticator entity 135-1 exists as an independent node will be described as an example. However, the present invention provides the anchor authenticator entity 135-1 as shown in FIG. Is also applicable when is included in the anchor ASN-GW (130-1).

Once the authentication procedure is complete, the anchor authenticator entity 135-1 is the MS 110 as the anchor SFA entity of the anchor ASN-GW 130-1 to establish the pre-provisioned service flow. A registration complete message (Registration Complete) indicating that the registration is completed is transmitted (S102). Subsequently, the anchor ASN-GW 130-1 receiving this performs a pre-provisioned service flow setting procedure based on the registration completion message (S103). Here, the registration completion message includes QoS profile information and policy information related thereto required for setting the pre-provisioned service flow in the anchor ASN-GW 130-1.

When the pre-provisioned service flow setup is completed, the anchor ASN-GW 130-1 performs the PMIP6 procedure necessary to provide network-based mobility based on the mobility mode of the MS 110 as follows.

First, the anchor ASN-GW 130-1 authenticates the anchor with a message (Anchor MM Context Request) for requesting information related to mobility of the MS 110, that is, anchor mobility management information (Anchor MM Context). The data is transmitted to the child entity 135-1 (S104). Based on the ID of the MS 110 included in the received message, the anchor authenticator entity 135-1 receiving the anchor authenticator entity 135-1 corresponds to the anchor mobility management information corresponding to the MS 110 among the anchor mobility management information being managed. MM Context). Thereafter, the anchor authenticator entity 135-1 transmits a response message (Anchor MM Context Response) including the selected anchor mobility management information to the anchor ASN-GW 130-1 (S105).

Here, the anchor mobility management information (Anchor MM Context) of the MS 110 according to an embodiment of the present invention may be represented as shown in Table 1 below.

Table 1

In Table 1, the anchor mobility management information includes information on the mobility mode of the MS 110 (MS Mobility Mode), information required according to the mobility mode (MIP4 Info, DHCP Server List, DHCP Proxy Info), and the MS 110. If the mobility mode of the) is PMIP6 further includes information related to PMIP6 (PMIP6 Info).

Table 2 illustrates mobility mode information among anchor mobility management information according to an embodiment of the present invention, and illustrates mobility mode information expressed as two bytes as an example.

Table 2.

Referring to Table 2, four mobility modes can be represented by mobility mode information, and the PMIP6 mode is a newly added mode in an embodiment of the present invention.

Meanwhile, when the mobility mode information corresponds to the PMIP6 mode, the anchor mobility management information further includes PMIP6 information. Table 3 below shows PMIP6 information according to an embodiment of the present invention.

Table 3.

Referring to Table 3, the PMIP6 information includes an LMA IP address required for performing the PMIP6 procedure, and may further include MS NAI and MS Home Network Prefix.

Meanwhile, the anchor ASN-GW 130-1 receiving the anchor mobility management information checks the mobility mode information of the MS 110 included in the anchor mobility management information and determines whether to perform the PMIP6 procedure (S106). That is, in the embodiment of the present invention, since the mobility mode of the MS 110 is PMIP6, the ASN-GW 130-1 determines to perform the PMIP6 procedure.

When the execution of the PMIP6 procedure is determined, the PMIP6 MAG functional entity of the anchor ASN-GW 130-1 transmits a Proxy Binding Update (PBU) message for creating a PMIP6 tunnel with the HA / LMA 210. Transfer to 210 (S107). Upon receiving this, the HA / LMA 210 generates a binding cache entry (BCE) for the MS 110 and allocates a home network prefix (HNP) of the MS 110. In operation S108, a proxy binding acknowledgment (PBA) message including the HNP information of the MS 110 is transmitted to the anchor ASN-GW 130-1.

The anchor ASN-GW 130-1 receiving this transmits a message (Router Advertisement) including the HNP information of the MS 110 extracted from the PBA message to the MS 110 (S110), thereby performing a home network simulation function. do. Accordingly, the MS 110 recognizes that it is connected to the home network by using the received HNP information of the MS 110, and sets a home network address (Home Address, HoA) (S111). Here, the MS 110 may use various methods for setting a home network address, and as a method for setting a home network address, the MS 110 sets an address for itself to use (stateless auto configuration). Or a method of setting an address of the MS 110 using address information from an address management server that allocates an address (Stateful Auto Configuration).

The anchor ASN-GW 130-1 receiving the PBA message also creates a PMIP6 tunnel with the HA / LMA 210 and generates routing information corresponding to the MS 110, thereby creating the anchor ASN-GW 130-1. An R3 data path is set between 1) and the HA / LMA 210 (S112).

On the other hand, before step S110, the MS 110 may transmit a message requesting the home network prefix information (Router Solicitation) to the anchor ASN-GW 130-1 (S109), which is an optional function, which is omitted in the present invention. It is also possible.

4 is a flowchart illustrating a handover method for providing network-based mobility in a mobile communication system according to an embodiment of the present invention, wherein the MS 110 located in an area of the ASN-GW 130-1 is shown. The handover method in the case where handover is performed between the ASN-GWs 130-1 and 130-2 as moves to the area of the ASN-GW 130-2.

In the following, when the ASN-Anchor handover is performed between the ASN-GWs 130-1 and 130-2 in accordance with the movement of the MS 110, the ASN-GW 130-1 is " anchor ASN-GW ( Anchor ASN-GW) "and the ASN-GW 130-2 are referred to as" Target ASN-GW ".

Here, the anchor ASN-GW (130-1) is responsible for the data path (anchor DPF) associated with the MS 110, anchor function of service flow delegation (anchor SFA), PMIP6 MAG function, IP6 access router (IP6 AR) function ASN-GW. In addition, it manages authentication and session information for the MS 110 during the handover and buffers the data packet or transmits the data packet to the target ASN-GW 130-2.

In addition, the target ASN-GW 130-2 is an ASN-GW directly connected to the MS 110 to perform a serving function. The target ASN-GW 130-2 is a relay function (relay DPF) and PMIP6 MAG function of a data path associated with the MS 110. It is in charge of IP6 access router (IP6 AR) function. The target ASN-GW 130-2 may operate as the anchor ASN-GW according to the handover status of the MS 110. When the target ASN-GW 130-2 does not operate as the anchor ASN-GW, the target ASN-GW 130-2 receives a data packet from the anchor ASN-GW and receives the BS. Serves as a relay to transmit to (120).

 Meanwhile, the anchor ASN-GW 130-1 is the ASN-GW corresponding to the MS 110 before the ASN-Anchor handover is performed, and the target ASN-GW 130-2 is the current ASN after the handover is performed. -GW can also be used.

Referring to FIG. 4, when handover between the ASN-GWs 130 needs to be performed due to the positional movement of the MS 110, the new ASN-GW 130-2 as the target is the previous ASN-GW 130-1. In step S201, an ASN-Anchor handover process is performed.

Subsequently, when the ASN-anchored handover process is completed, the R3 data path between the HA / LMA 210 and the anchor ASN-GW 130-1 is not changed, so the data path is the HA / LMA 210 and the anchor ASN. R3 data path (S202) between GW (130-1), R4 data path (S203) between anchor ASN-GW (130-1) and target ASN-GW (130-2), and target ASN-GW (130-). There is an R6 data path S204 between 2) and BS 120.

In addition, even when ASN-Anchor handover is performed, the authentication procedure is omitted since the anchor authenticator entity has not been relocated yet, and through the path extension scheme, the MS 110 provides a seamless service of the existing service. Therefore, a separate PMIP6 procedure triggering method is needed to perform the PMIP6 procedure for resetting the R3 data path to the data path between the target ASN-GW 130-2 and the HA / LMA 210. The PMIP6 procedure performed at this time should not affect the real-time service.

On the other hand, after the ASN-Anchor handover is performed, an Intra-ASN Functional entity located at the target ASN is used as an anchor data path functional handover (Anchor DPF HO) for relocation of the anchor DPF for various purposes. You can request For example, if the serving SFA entity that manages the service flow monitors real-time services and no real-time services are running, the anchor certifier relocation occurs to the target authenticator entity, or the anchor DPF for resource management purposes, etc. You can request a handover. When it is determined that anchor DPF handover is necessary as described above, a corresponding entity (Intra-ASN Functional) located in the target ASN is a message that triggers anchor DPF handover to the relay DPF entity of the target ASN-GW 130-2. HO Trigger) is transmitted (S205).

 When a request for an anchor DPF handover is received from a target ASN functional entity to trigger an R3 data path relocation, the target ASN-GW 130-2 receives the anchor ASN to trigger an R3 data path relocation through the execution of the PMIP6 procedure. -Relay the message (Anchor DPF HO Trigger) received by the GW (130-1) (S206). The ASN-GW 130-1 receiving the ASN-GW 130-1 sets the lifetime field of the PBU message to 0 in order to delete the PMIP6 tunnel, that is, the R3 data path, with the HA / LMA 210 that is previously set. It transmits to HA / LMA 210 (S207).

On the other hand, the HA / LMA 210 receiving the PBU message may be generated from the target ASN-GW (130-2) for handover purposes for this purpose for a certain time (Delay BCE timer) for the MS (110) Keep the Binding Cash Entry (BCE) without deleting it. In addition, buffering is performed on the data packet received while maintaining the BCE (S208).

Thereafter, the HA / LMA 210 transmits the PBA message to the anchor ASN-GW 130-1 (S409), and the anchor ASN-GW 130-1 receiving the PBA message receives the PMIP6 tunnel to the MS 110. The R3 data path is deleted by deleting the routing table (S210). Then, an anchor DPF handover request message including anchor mobility management information (Anchor MM Context) is transmitted to the target ASN-GW 130-2 to request the anchor DPF handover (S211).

Thereafter, the target ASN-GW 130-2 transmits a PBU message to the HA / LMA 210 to create a PMIP6 tunnel with the HA / LMA 210 (S212). Upon receiving this, the HA / LMA 210 sends a PBA message containing the information of the home network prefix previously assigned to the MS 110 through the binding cache entry of the MS 110 to the target ASN-GW 130-2. In step S213, the PMIP6 tunnel is generated with the target ASN-GW 130-2 and the HA / LMA 210 transmits the buffered data packet to the target ASN-GW 130-2.

Accordingly, the target ASN-GW 130-2 generates the PMIP6 tunnel and routing table to send an anchor DPF HO Response to the anchor ASN-A so that the PMIP6 procedure is completed and the PMIP6 procedure is completed. Transmitting to the GW (130-1) (S214). In addition, a message (Router Advertisement) including the home network prefix information of the MS 110 received from the HA / LMA 210 is transmitted to the MS 110 (S215).

Meanwhile, as the target ASN-GW 130-2 completes the PMIP6 procedure and delivers an anchor DPF HO response message indicating this to the anchor ASN-GW 130-1, the target ASN-GW 130-2 may transmit the target ASN-GW 130-1. The R4 data path between the GW 130-2 and the anchor ASN-GW 130-1 is deleted (S216). In addition, since a new R3 data path is set (S217), the target ASN-GW 130-2 serves as the anchor ASN-GW 130-1.

On the other hand, since the home network prefix information has not changed, the MS 110 receiving the Router Advertisement message recognizes that it stays in the home network continuously and does not perform any procedure.

As described above, the method of triggering the PMIP6 procedure to be performed at the initial access of the UE and the handover between the ASN-GWs has an effect of efficiently providing network-based mobility in the mobile communication system.

The embodiments of the present invention described above are not implemented only through the apparatus and the method, but may be implemented through a program for realizing a function corresponding to the configuration of the embodiment of the present invention or a recording medium on which the program is recorded. Implementation may be easily implemented by those skilled in the art from the description of the above-described embodiments.

Although the embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements of those skilled in the art using the basic concepts of the present invention defined in the following claims are also provided. It belongs to the scope of rights.

1 is a structural diagram illustrating a network of a mobile communication system according to an exemplary embodiment of the present invention.

2 illustrates the allocation of functional entities between an ASN-GW and a BS in a mobile communication system according to an embodiment of the present invention.

3 is a flowchart illustrating an initial access method for providing network-based mobility in a mobile communication system according to an embodiment of the present invention.

4 is a flowchart illustrating a handover method for providing network-based mobility in a mobile communication system according to an embodiment of the present invention.

Claims (10)

A method for providing network-based mobility by an access service network gateway at initial access of a terminal, Acquiring anchor mobility management information of the terminal from an authenticator entity when setting of the authentication procedure and pre-provisioned service flow for the terminal is completed; And Providing network-based mobility to the terminal by performing a proxy mobility IP procedure based on the anchor mobility management information Mobility providing method comprising a. The method of claim 1, The anchor mobility management information includes at least one of mobility mode information and information required for performing the proxy mobility IP procedure. The method of claim 2, Determining whether to perform the proxy mobility IP procedure based on the mobility mode information More, The providing step, If the execution of the proxy move IP procedure is determined, performing the proxy move IP procedure in association with a home agent Mobility providing method comprising a. The method according to any one of claims 1 to 3, And wherein the proxy mobile IP procedure is performed by an entity performing a proxy mobile IP version 6 media access gateway function in the access service network gate. In the mobile communication system including a home agent, when a handover occurs between a first gateway, which is a current gateway, and a second gateway, which is a previous gateway, as the terminal moves, the first gateway provides network-based mobility to the terminal. To Performing a first handover in association with the second gateway; If a triggering message of a second handover is received from a target access service network functional entity, sending the received triggering message to the second gateway; And If the first data path is deleted between the second gateway and the home agent, providing network-based mobility to the terminal by performing a proxy mobility IP procedure associated with the home agent; Mobility providing method comprising a. The method of claim 5, Providing the mobility, When the anchor mobility management information of the terminal is received from the second gateway, determining that the data path has been deleted; And If it is determined that the data path has been deleted, generating a proxy mobile IP tunnel with the home agent and a routing table corresponding to the terminal in association with the home agent; Mobility providing method comprising a. The method of claim 6, Providing the mobility, Receiving the data packet buffered for a preset time after the transmission of the triggering message from the home agent when the proxy mobile IP tunnel is generated; And Transmitting the buffered data packet to the terminal. Mobility providing method further comprising. The method according to any one of claims 5 to 7, And the first gateway and the second gateway are access service network gateways. The method of claim 8, And wherein the first handover is an access service network anchored handover and the second handover is an anchor data path function handover. In a mobile communication system, in a recording medium on which a structure of anchor mobility management information is recorded, A mobility mode field in which mobility mode information indicating one of a plurality of mobility modes including proxy mobility IP version 6 is recorded; And Proxy Move IP Version 6 Information field, which records the information needed for the Proxy Move IP Version 6 procedure performed to provide network-based mobility. Record carrier recording anchor mobility management information structure comprising a.

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