WO2010008255A2

WO2010008255A2 - A method and system for supporting pmipv6 in wireless communication networks

Info

Publication number: WO2010008255A2
Application number: PCT/KR2009/003986
Authority: WO
Inventors: 이동현; 성수련
Original assignee: 포스데이타 주식회사
Priority date: 2008-07-17
Filing date: 2009-07-17
Publication date: 2010-01-21
Also published as: WO2010008255A3

Abstract

The present invention relates to a method and system for supporting PMIPv6 (Proxy Mobile Internet Protocol version 6) in wireless communication networks. The system supporting PMIPv6 in wireless communication networks comprises: a IPv6(Internet Protocol version 6) packet with a destination address as a terminal HoA (Home of Address); a HA/LMA which sends the IPv6 packet to a CoA (Care of Address) of a terminal matching a prefix of said destination address; and an AR/MAG which has the same IPv6 address as the CoA of said terminal and sends the IPv6 Packet transmitted by said HA/LMA to said terminal.

Description

Method and system supporting PMIPv6 in wireless communication network

The present invention relates to a method and system for supporting PMIPv6 (PMIPv6) in a wireless communication network, and more particularly, to connection setup (Session), session update, hand for supporting PMIPv6 in a wireless communication network. The present invention relates to a method and system for performing a procedure such as handover and session termination.

Mobile Internet Protocol version 6 (MIPv6) is a technology established by the Internet Engineering Task Force's MIPv6 Working Group (IETF) and is an international standard protocol for supporting Internet Protocol version 6 (IPv6) layer mobility. MIPv6 binds the home address (hereinafter referred to as 'HoA') of the terminal and the temporary address (Care of Address (hereinafter referred to as 'CoA')) generated by the mobile network. This is a technology that supports mobility through a dual addressing system by registering in 'HA'. Hereinafter, the MIPv6 technology according to the prior art will be described using handover as an example of such mobility support.

1 is a diagram illustrating the structure of a wireless communication network, and in particular, a diagram illustrating the structure of a portable Internet network.

As shown in FIG. 1, a portable Internet network includes a terminal (PSS) 10, a base station (RAS) for transmitting and receiving data through a wireless interface with the terminal; Base station (20a, 21a, 20b, 21b), terminal 10 and base station (20a, 21a, 20b, 21b) and control station (ACR; Access Control Router (ACR) 30a, 30b) for routing IP packets. A home agent (HA) 40 supporting IP mobility of the terminal, an authentication, authorization, and accounting (AAA) server (not shown) that performs authentication, authorization, and charging for the terminal and the terminal user. An IP network of an individual operator connected to the

control stations

30a and 30b, the HA 40, and the AAA server is connected to the public IP network to provide the mobile Internet service to the terminal 10.

2 is a flowchart illustrating a method of providing a MIPv6 service in a portable Internet network with reference to FIG. 1. For reference, although there may be a plurality of subnets, it is assumed that the first subnet and the second subnet exist for convenience of description.

Referring to FIG. 2, steps S102 to S110 indicate a process in which a terminal 10 equipped with a MIPv6 client establishes a session with a first subnet, and in step S112, the terminal 10 sets the first subnet in the first subnet. Moving to the second subnet indicates that handover is performed, and steps S114 to S122 indicate a process in which the terminal 10 newly establishes a new subnet, that is, a second subnet and a session. This will be described in more detail below.

First, the terminal 10 is assigned a Home of Address (HoA) from a Home Agent (HA) 40 on a Home Network when a network is initially entered. When the terminal 10 assigned the HoA enters the first subnet, the terminal 10 performs an IEEE 802.16e based network entry procedure with the control station 30a via the base station 20a. After the execution, an IPv6 address to be used as a care of address (CoA) is obtained (S102-S106). In addition, the terminal 10 performs a CMIPv6 (Client MIPv6) registration procedure with the HA 40 using CoA and HoA, and then communicates with a correspondent node (CN) 50 (S108-S110). ).

Meanwhile, when the terminal 10 moves to the second subnet while communicating with the counterpart node 50, the terminal 10 performs a handover between the base station 20a of the first subnet and the base station 20b of the second subnet (S112). Accordingly, the terminal 10 should perform a procedure for obtaining a new IPv6 address from the control station 30b of the second subnet. That is, after performing an IEEE 802.16e based network entry procedure with the control station 30b via the base station 20b, an IPv6 address to be used as a new care of address (CoA) is obtained (S114-S118). Subsequently, the terminal 10 performs a CMIPv6 (Client MIPv6) registration procedure with the HA 40 using the newly acquired CoA and the existing HoA, and then performs communication with the counterpart node in the second subnet (S120-S122). ).

In this case, as described above, the terminal 10 equipped with the MIPv6 client should be aware that the subnet changes each time a handover occurs, and must acquire a new IPv6 address (temporary address) used as a CoA. Since a process of registering with the HA 40 using a CoA and an existing HoA has to be performed, there is a problem that a certain time (approximately 2 seconds to 4 seconds) of data loss occurs.

In particular, in the case of a terminal without MIPv6 function, when a handover is performed to a base station located in a different subnet, a session using an existing address must be terminated and a session is created again with a new address. Protocol) There was a problem that all sessions, video calls, etc. are disconnected.

Therefore, in order to improve these problems, a procedure such as connection setup, session update, handover, and session termination that can provide a mobile IPv6 (MIPv6) client at the provider side is required.

The present invention was devised to solve the above problems or requirements, and an object of the present invention is to provide a method and system for supporting PMIPv6 in a wireless communication network.

Another object of the present invention is to provide a method and system for performing procedures such as connection setup, session update, handover, and session termination for PMIPv6 support.

For the above purpose, the method for supporting PMIPv6 in a wireless communication network of one embodiment of the present invention includes a Home Agent (HA) / LMA (Localized Mobility) from an AAA (Authentication, Authorization, Accounting) server during network entry and authentication of a terminal. Receiving subscriber profile information including an address of an anchor and a home network prefix (HNP); Transmitting a message requesting a proxy binding update including the HNP to the HA / LMA corresponding to the address of the HA / LMA; And in response to acknowledgment of the proxy binding update transmitted from the HA / LMA, transmitting a router advertisement message including HNP information to the terminal.

In a wireless communication network of one embodiment of the present invention, a system supporting PMIPv6 includes a prefix of an Internet Protocol version 6 (IPv6) packet having a home address (HoA) of a terminal as a destination address. HA / LMA which transmits the IPv6 packet to a care of address (CoA) of the terminal that matches (); And an AR / MAG having the same IPv6 address as the CoA of the terminal and transmitting the IPv6 packet transmitted from the HA / LMA to the terminal.

In addition, the method for supporting PMIPv6 in a wireless communication network according to another aspect of the present invention may include: checking a remaining time for a PMIPv6 session of at least one terminal; When the remaining time of a specific PMIPv6 session reaches a preset validity time threshold, the proxy binding update including the HNP of the terminal corresponding to the specific PMIPv6 session and a new valid time for extending the specific PMIPv6 session (Proxy) Sending a Binding Update) message to the HA / LMA; And receiving, from the HA / LMA, a Proxy Binding Acknowledge (ACK) message confirming the extension of the valid time of the specific PMIPv6 session, and extending the PMIPv6 session.

In the method for supporting PMIPv6 in a wireless communication network according to another aspect of the present invention, an AR / MAG receives a De-Registration Request (DEG-REQ) message in which a UE requests to release a PMIPv6 session. Transmitting to; Transmitting, by the AR / MAG, a Proxy Binding Update message including a HNP of the terminal and a lifetime set to 0 for the terminal to HA / LMA; And releasing, by the HA / LMA, the session for the terminal with the AR / MAG based on the HNP, and transmitting a proxy binding acknowledgment (ACK) message including the HNP to the AR / MAG. Characterized in that.

In addition, the method for supporting PMIPv6 in a wireless communication network according to another embodiment of the present invention, wherein the AAA server transmits a RADIUS or DIAMETER message for requesting termination of a PMIPv6 session of a terminal to a gateway of an access service network (ASN). step; A gateway of the ASN transmitting a RADIUS or DIAMETER message in response to a request for terminating a PMIPv6 session of the terminal to the AAA, and a data path function (DPF) of the ASN changing the state of the terminal; Initiating a data path deregistration procedure by the gateway of the ASN, and performing a DHCPv6 deactivation procedure by the terminal according to the deregistration request of the base station; Sending, by the base station, a data path release response to the gateway of the ASN in response to the deregistration request; And performing a binding update procedure by the gateway of the ASN to release the PMIPv6 session with the HA / LMA according to the data registration path release response.

The method for supporting PMIPv6 in a wireless communication network according to another embodiment of the present invention includes the steps of: HA / LMA transmitting a binding revocation indication (BRI) message including the HNP of the terminal to AR / MAG. ; Sending, by the AR / MAG, a Binding Revocation Acknowledgment (BRA) message in response to the Binding Revocation Instruction message to the HA / LMA, and requesting a data path deregistration to the base station; And performing, by the terminal, a DHCPv6 release procedure according to the deregistration request of the base station.

According to the present invention, by mounting a PMIPv6 client (Proxy MIPv6 Client) on the service provider side (for example, the control station, the gateway), it is possible to provide MIPv6 service to the terminal without the MIPv6 function, and also the terminal Since there is no need to perform MIPv6 related procedure, it has the effect of providing packet loss or seamless service.

In addition, according to the present invention, procedures such as connection setup, session update, handover, and session termination for PMIPv6 support can be efficiently implemented.

Also, according to the present invention, only the 64-bit prefix of the destination address is checked by the home agent, router, or gateway for the IPv6 packet transmitted from the correspondent node (CN) to the terminal. As a result, routing can be efficiently performed.

In addition, according to the present invention, the AAA server designates an HA to perform a proxy binding update for the terminal, thereby controlling the load balance of the HA.

1 is a diagram illustrating a structure of a general wireless communication network.

2 is a flowchart of a method for providing a MIPv6 service according to the prior art.

3 is a flowchart of a method for supporting PMIPv6 in a wireless communication network according to the first embodiment of the present invention.

4 is a diagram illustrating a structure of a packet transmitted between HAv6 and MAG.

5 is a diagram illustrating a process of generating an interface ID (IID) of a terminal using a MAC address.

6 is a flowchart of a method for supporting PMIPv6 in a wireless communication network according to a second embodiment of the present invention.

7 is a flowchart of a method for supporting PMIPv6 in a wireless communication network according to a third embodiment of the present invention.

8 is a flowchart of a method for supporting PMIPv6 in a wireless communication network according to a fourth embodiment of the present invention.

9 is a flowchart illustrating a method for supporting PMIPv6 in a wireless communication network according to a fifth embodiment of the present invention.

10 is a flowchart of a method for supporting PMIPv6 in a wireless communication network according to a sixth embodiment of the present invention.

11 is a flowchart of a method for supporting PMIPv6 in a wireless communication network according to a seventh embodiment of the present invention.

12 is a flowchart of a method for supporting PMIPv6 in a wireless communication network according to an eighth embodiment of the present invention.

13 is a flowchart of a method for supporting PMIPv6 in a wireless communication network according to a ninth embodiment of the present invention.

14 is a flowchart of a method for supporting PMIPv6 in a wireless communication network according to a tenth embodiment of the present invention.

15 is a flowchart illustrating a method for supporting PMIPv6 in a wireless communication network according to an eleventh embodiment of the present invention.

16 is a flowchart illustrating a method for supporting PMIPv6 in a wireless communication network according to a twelfth embodiment of the present invention.

17 is a flowchart illustrating a method for supporting PMIPv6 in a wireless communication network according to a thirteenth embodiment of the present invention.

18 is a flowchart of a method of supporting PMIPv6 in a wireless communication network according to a fourteenth embodiment of the present invention.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings and preferred embodiments. For reference, in the following description, a detailed description of well-known functions and configurations that may unnecessarily obscure the subject matter of the present invention will be omitted. Also, in connection with the present invention, a technique for mounting a PMIPv6 client in a control station instead of a terminal is disclosed in August 2007. Refer to Application No. 10-2007-0079063 filed on July 7, "Method and Apparatus for Supporting MIPv6 Service in a Wireless Communication Network".

3 is a flowchart of a method for supporting PMIPv6 in a wireless communication network according to the first embodiment of the present invention. For reference, the first embodiment of the present invention illustrates a PMIPv6 connection setup process using an automatic address assignment method.

As shown in FIG. 3, a system supporting PMIPv6 in a wireless communication network according to a first embodiment of the present invention includes a terminal 10, a base station 20, an A-DPF (Anchored Data Pass Function) 35, and DHCPv6. (Dynamic Host Configuration Protocol version 6) (37), Mobility Access Gateway (MAG) (39), Authentication, Authorization, Accounting (AAA) (45), Home Agent version 6 (HAv6) / Localized Mobility Anchor (LMA) (40) ), And the like.

First, in step S202, the terminal 10 is linked to the base station 20, MAG 39, AAA 45, etc. in accordance with the IEEE 802.16e network entry procedure (Network Entry Procedure), Initial Authentication Procedure (Initial Authentication Procedure) And so on. In the initial authentication procedure, the AAA 45 downloads subscriber profile information to the MAG 39. In the present embodiment, the AAA 45 includes the IPv6 address of the HAv6 / LMA 40 in the terminal profile information. Included. That is, in this embodiment, the AAA 45 designates the HAv6 / LMA 40 supporting mobility of the terminal 10 by providing an IPv6 address of the HAv6 / LMA 40 corresponding to the terminal 10. As a result, the AAA 45 may control load balance with respect to the plurality of HAv6 / LMAs 40. In addition, the terminal profile information may optionally include a Home Network Prefix (HNP), which is a prefix of an IPv6 address to be used as a home of address (HoA) of the terminal, wherein the HNP is unique for each terminal in a subnet. Is allocated.

When the network entry and authentication procedure is completed, in step S204, ISF (Initial for IPv6 Convergence Sublayer) between the terminal 10 and the A-DPF 35 using a link local address of the terminal. Service Flow) is formed, whereby the terminal 10 and the A-DPF 35 can transmit and receive IPv6 packets on the IPv6 CS.

In step S206, the A-DPF 35 sends a Proxy Binding Update Request message to the MAG 39, and in step S208, the MAG 39 updates the proxy binding to the HAv6 / LMA 40. Send a (Proxy Binding Update) message. For reference, the HAv6 / LMA 40 is specified in the terminal profile information downloaded from the AAA 45 by the MAG 39 in the initial authentication process, and the MAG 39 may identify the terminal's HNP (Home) in the terminal profile information. Network Prefix) is included and transmitted in the proxy binding update message.

After receiving the proxy binding update message, in step S210, the HAv6 / LMA 40 sends the MAG 39 to the AAA 45 by sending a Remote Authentication Dial In User Service (RADIUS) Access-Request message or a DIAMETER DER message. Ask for authentication. Then, in step S212, the AAA 45 transmits a RADIUS Access-Accept message or a DIAMETER DEA message to the HAv6 / LMA 40 in response to the response, and the HAv6 / LMA 40 receives the location of the terminal 10. Update it. Here, the location update of the terminal matches the mobility network of the HAv6 / LMA 40 by matching the home network prefix (HNP) assigned to the terminal with the IPv6 address of the MAG 39 (which becomes the care of address (CoA) of the terminal). This means that the Proxy Binding Update is performed by registering with the Mobility Binding Entity. Accordingly, the HAv6 / LMA 40 generates a tunnel for the MAG 39 and transmits a packet having the HNP of the terminal as a destination address to the MAG 39 through the tunnel. For reference, if there is no HNP of the UE in the proxy binding message transmitted from the MAG 39, the HAv6 / LMA 40 may be implemented to allocate the HNP of the UE by itself.

On the other hand, in step S214, HAv6 / LMA 40 transmits a proxy binding ACK (Propxy Binding Acknowledge) message to the MAG 39, at this time, the proxy binding ACK message includes the HNP of the terminal 10. And, accordingly, the MAG 39 generates a tunnel capable of transmitting the packet transmitted from the terminal to the HAv6 / LMA 40. For reference, the tunnel between the HAv6 / LMA 40 and the MAG 39 is for relaying IPv6 packet transmission and reception between the UE 10 and the Corresponding Node (CN) 50 in MIPv6. -in-IP, Generic Routing Encapsulation (GRE) can be used.

In this regard, FIG. 4 illustrates a structure of an IPv6 packet transmitted from a Corresponding Node (CN) 50 to the terminal 10. In this case, in the present invention, the HAv6 / LMA 40 supports the terminal 10. An IPv6 packet having a HoA of 128 bits as a destination address may be routed to a corresponding MAG 39 using only HNPs (64 bits) of a terminal. In other words, since the Home Network Prefix (HNP) of the terminal is uniquely allocated within the subnet, the HAv6 / LMA 40 checks only the upper 64 bits corresponding to the HNP of the destination address of the IPv6 packet, thereby corresponding MAG (39). Routing can reduce the data throughput.

Upon receiving the proxy binding ACK message from the HAv6 / LMA 40, in step S216, the MAG 39 sends a Proxy Binding Acknowledge Response message to the A-DPF 35. In operation S218, the A-DPF 35 transmits a Router Advertisement message to the terminal 10 through the base station 20. The router advertisement message includes a home network prefix (HNP) of the terminal 10. ) Is included. In addition, the router advertisement message may include a flag for designating the address acquisition method of the terminal.

If the address acquisition method of the terminal is set to auto-configuration through DAD (Duplicate Address Detection) (eg, Flag == 0), in step S220, the terminal 10 is included in the router advertisement message. A global IPv6 address (ie, HoA (Home of Address)) of the terminal is generated by using the HNP (Home Network Prefix) and the interface ID (IID) of the terminal. For reference, FIG. 5 illustrates an example of generating an interface identifier (IID) of a 64 bit terminal using a MAC address of a 48 bit terminal.

In addition, the terminal 10 transmits a Neighbor Solicit (NS) message to the A-DPF 35 and the generated address for a predetermined time (that is, the time that the terminal uses the corresponding address) from the A-DPF 35. If it is not reported that the collision is a terminal 10 uses it as a global IPv6 address of the terminal.

When the aforementioned IPv6 address allocation process is completed, in step S222, the A-DPF 35 adds a new Convergence Sublayer (CS) rule to the ISF (Initial Service Flow) for the newly allocated IPv6 prefix. Modify

6 is a flowchart illustrating a method for supporting PMIPv6 in a wireless communication network according to a second embodiment of the present invention. For reference, the second embodiment of the present invention illustrates a PMIPv6 connection setup process using Dynamic Host Configuration Protocol version 6 (DHCPv6).

6, the process of steps S302 to S318 of the second embodiment of the present invention is substantially the same as the process of steps S202 to S218 of the first embodiment described above, which will be briefly described below.

In step S302, the terminal 10 interworks with the base station 20, the MAG 39, the AAA 45, and the like to perform a network entry procedure based on IEEE 802.16e, an initial authentication procedure, and the like. To perform. In the initial authentication procedure, the MAG 39 downloads terminal profile information including the IPv6 address of the HAv6 / LMA 40 from the AAA 45. For reference, the terminal profile information may include a home network prefix (HNP) of the terminal 10.

When the network entry and authentication procedure is completed, in step S304, ISF (Initial for IPv6 Convergence Sublayer) between the terminal 10 and the A-DPF 35 using a link local address of the terminal. Service Flow) is formed.

In operation S306, the A-DPF 35 transmits a Proxy Binding Update Request message to the MAG 39, and in operation S308, the MAG 39 may proxy the HAv6 / LMA 40. Send a Proxy Binding Update message.

In step S310, the HAv6 / LMA 40 requests authentication for the MAG 39 by sending a Remote Authentication Dial In User Service (RADIUS) Access-Request message or a DIAMETER DER message to the AAA 45, and in step S312 In response, the AAA 45 sends a RADIUS Access-Accept message or a DIAMETER DEA message to the HAv6 / LMA 40 in response. The HAv6 / LMA 40 matches the home network prefix (HNP) of the terminal with the IPv6 address of the MAG 39 (which becomes the CoA of the terminal), and the mobility binding entity of the HAv6 / LMA 40. ) To perform the Proxy Binding Update. Accordingly, the HAv6 / LMA 40 generates a tunnel for the MAG 39 and transmits a packet having the HNP of the terminal as a destination address to the MAG 39 through the tunnel.

On the other hand, in step S314, HAv6 / LMA 40 transmits a proxy binding ACK (Propxy Binding Acknowledge) message to the MAG 39, at this time, the HNP of the terminal 10 is included in the proxy binding ACK message. In addition, the MAG 39 generates a tunnel capable of transmitting a packet transmitted from the terminal to the HAv6 / LMA 40.

Thereafter, in step S316, the MAG 39 transmits a Proxy Binding Acknowledge Response message to the A-DPF 35, and in step S318, the A-DPF 35 obtains the address of the terminal. The router (Router Advertisement) message including a flag (flag) and the HNP of the terminal transmits to the terminal 10 through the base station 20.

If the address acquisition scheme of the terminal is set to receive a floating IPv6 address from the DHCPv6 37 (eg, Flag == 1), in step S320, the terminal 10 invites a DHCPv6 to the DHCPv6 37 (Solicit). Start the DHCPv6 process by sending a message.

When the DHCPv6 37 receives the DHCPv6 solicitation message from the terminal 10, in step S322, the DHCPv6 37 allocates a 128bits HoA (home of Address) (this includes the HNP of the terminal) to the terminal to provide a DHCPv6 advertisement. (Advertisement) Send a message. In this case, if the DHCPv6 37 is a DHCPv6 proxy, the IPv6 address is assigned by local policy. If the DHCPv6 37 is a DHCPv6 relay, the IPv6 address is assigned in conjunction with a remote DHCPv6 server. do.

In step S324, the terminal 10 transmits a DHCPv6 request message to the DHCPv6 37, and in step S328, the DHCPv6 37 transmits a DHCPv6 reply message to the terminal 10, The HoA allocation process of the terminal is completed.

When the aforementioned IPv6 address assignment process is completed, in step S330, the A-DPF 35 modifies the ISF path by adding a new convergence sublayer (CS) rule to the Initial Service Flow (ISF).

7 is a flowchart of a method for supporting PMIPv6 in a wireless communication network according to a third embodiment of the present invention. For reference, a third embodiment of the present invention illustrates a PMIPv6 connection setup process using an automatic address assignment method.

As shown in FIG. 7, the system supporting PMIPv6 in the wireless communication network according to the third embodiment of the present invention includes a terminal 10, a base station 20, an access router (AR) / Mobility Access Gateway (MAG) 36. ), AAA (Authentication, Authorization, Accounting) 45, HAv6 (Home Agent version 6) / LMA (Localized Mobility Anchor) 40, and the like.

First, in step S402, the terminal 10 performs a network entry procedure, an initial authentication procedure, etc. in conjunction with the base station 20, AR / MAG 36, AAA 45, and the like. do. In the initial authentication procedure, the AAA 45 downloads subscriber profile information for the PMIPv6 service to the AR / MAG 36. In this embodiment, the AAA 45 includes the HAv6 / LMA 40 in the terminal profile information. ) Is included. That is, in this embodiment, the AAA 45 designates the HAv6 / LMA 40 supporting mobility of the terminal 10 by providing an IPv6 address of the HAv6 / LMA 40 corresponding to the terminal 10. As a result, the AAA 45 may control load balance with respect to the plurality of HAv6 / LMAs 40. The terminal profile information may optionally include a home network prefix (HNP), which is a prefix of an IPv6 address to be used as a home of address (HoA) of the terminal, wherein the HNP is unique for each terminal in a subnet. Is allocated. In addition, the terminal profile information may include a DHCPv6 server address. If the DHCPv6 server address is included, the ASN (Access Service Network) provides a DHCPv6 relay function, and if the DHCPv6 server address is not included, the ASN is DHCPv6. Proxies are provided.

When the network entry and authentication procedure is completed, in step S404, the AR / MAG 36 transmits a Proxy Binding Update message to the HAv6 / LMA 40. For reference, the HAv6 / LMA 40 is designated in the terminal profile information downloaded from the AAA 45 by the AR / MAG 36 in the initial authentication procedure, and the AR / MAG 36 is assigned to the terminal profile information. If HNP is included, it is included in the proxy binding update message and transmitted.

After receiving the proxy binding update message, in step S406, the HAv6 / LMA 40 sends an AR / MAG (36) message by sending a Remote Authentication Dial In User Service (RADIUS) Access-Request message or a DIAMETER MAR message to the AAA 45. Request authentication). Then, in step S408, the AAA 45 transmits a RADIUS Access-Accept message or a DIAMETER MAA message to the HAv6 / LMA 40 in response to this, and the HAv6 / LMA 40 receives the location of the terminal 10. Update it. Here, the location update of the UE matches the mobility network entity of the HAv6 / LMA 40 by matching the HNP (Home Network Prefix) assigned to the UE with the IPv6 address of the AR / MAG 36 (which becomes the CoA of the UE). By registering in Binding Entity, it means to perform Proxy Binding Update. And, accordingly, the HAv6 / LMA 40 generates a tunnel for the AR / MAG 36, and transmits a packet having the HNP of the terminal as a destination address to the AR / MAG 36 through the tunnel. do. For reference, if there is no HNP of the UE in the proxy binding update message transmitted from the AR / MAG 36, the HAv6 / LMA 40 may be implemented to allocate the HNP of the UE itself.

Meanwhile, in step S410, the HAv6 / LMA 40 transmits a proxy binding acknowledgment (ACK) message to the AR / MAG 36, wherein the proxy binding ACK message includes the HNP of the terminal 10. . And, accordingly, the AR / MAG 36 generates a tunnel capable of transmitting the packet transmitted from the terminal to the HAv6 / LMA 40. For reference, the tunnel between the HAv6 / LMA 40 and the AR / MAG 36 is for relaying IPv6 packet transmission and reception between the terminal 10 and the correspondent node (CN) 50 in MIPv6. This may use IP-in-IP, Generic Routing Encapsulation (GRE), and the like.

As described above, when the network entry and authentication procedure and the registration procedure are successfully completed, in step S412, the service flow authorization (SFA) of the ASN is performed using the link local address of the terminal 10 and the AR. Form an Initial Service Flow (ISF) for the IPv6 Convergence Sublayer (CSS) between / MAG 36.

Then, in step S414, the terminal 10 configures the link local address and performs a duplicate address detection (DAD) process. And, in step S416, the terminal 10 sends a Router Solicit message to the AR / MAG 36 to know the available routers on the link.

Then, in step S418, AR / MAG 36 transmits a Router Advertisement (Router Advertisement) message to the terminal 10 through the base station 20, the router advertisement message to the Home Network Prefix (HNP) of the terminal 10 ) Is included. In addition, the router advertisement message may include a flag for designating the address acquisition method of the terminal.

If the address acquisition method of the terminal is set to auto-configuration through DAD (Duplicate Address Detection) (eg, Flag == 0), in step S420, the terminal 10 is included in the router advertisement message. A global IPv6 address (ie, HoA (Home of Address)) of the terminal is generated by using the HNP (Home Network Prefix) and the interface ID (IID) of the terminal.

8 is a flowchart of a method for supporting PMIPv6 in a wireless communication network according to a fourth embodiment of the present invention. For reference, the fourth embodiment of the present invention illustrates a PMIPv6 connection setup process using Dynamic Host Configuration Protocol version 6 (DHCPv6).

As shown in FIG. 8, the system supporting PMIPv6 in the wireless communication network according to the fourth embodiment of the present invention includes a terminal 10, a base station 20, an access router (AR) / mobility access gateway (MAG) 36. ), Dynamic Host Configuration Protocol version 6 (DHCPv6) Proxy / Relay (37), Authentication, Authorization, Accounting (AAA), DHCPv6 Server (47), Home Agent Version 6 (HAv6) / Localized Mobility Anchor (LMA) 40 and the like.

Referring to FIG. 8, the processes of steps S502 to S518 of the fourth embodiment of the present invention are substantially the same as the processes of steps S402 to S418 of the third embodiment described above, which will be briefly described below.

In step S502, the terminal 10 performs a network entry procedure, an initial authentication procedure, etc. in conjunction with the base station 20, AR / MAG 36, AAA 45, and the like. In the initial authentication procedure, the AR / MAG 36 downloads subscriber profile information including the IPv6 address of the HAv6 / LMA 40 from the AAA 45. For reference, the terminal profile information may include a home network prefix (HNP) of the terminal 10.

When the network entry and authentication procedure is completed, in step S504, AR / MAG 36 transmits a Proxy Binding Update message to the HAv6 / LMA 40.

Then, in step S506, the HAv6 / LMA 40 requests authentication for the AR / MAG 36 by sending a RADIUS Access-Request message or DIAMETER MAR message to the AAA 45, and in step S508, the AAA 45 ) Sends a RADIUS Access-Accept message or DIAMETER MAA message to the HAv6 / LMA 40 in response. In addition, the HAv6 / LMA 40 matches the HNP (Home Network Prefix) of the terminal and the IPv6 address of the AR / MAG 36 (which becomes the CoA of the UE), thereby enabling the mobility binding entity of the HAv6 / LMA 40 (Mobility). Proxy Binding Update is performed by registering in Binding Entity. And, accordingly, the HAv6 / LMA 40 generates a tunnel for the AR / MAG 36, and transmits a packet having the HNP of the terminal as a destination address to the AR / MAG 36 through the tunnel. do.

On the other hand, in step S510, HAv6 / LMA 40 transmits a proxy binding ACK (Propxy Binding Acknowledge) message to the AR / MAG 36, wherein the proxy binding ACK message includes the HNP of the terminal 10 . The AR / MAG 36 generates a tunnel capable of transmitting the packet transmitted from the terminal to the HAv6 / LMA 40.

As described above, when the network entry and authentication procedure and the registration procedure are successfully completed, in step S512, the service flow authorization (SFA) of the ASN is performed by using the link local address of the terminal 10 and the AR. Form an Initial Service Flow (ISF) for the IPv6 Convergence Sublayer (CSS) between / MAG 36.

Then, in step S514, the terminal 10 configures the link local address and performs a Duplicate Address Detection (DAD) process, and in step S516, the router solicits the router to know the available routers on the link. Router Solicit) message is transmitted to the AR / MAG 36.

Then, in step S518, AR / MAG 36 transmits a Router Advertisement (Router Advertisement) message to the terminal 10, the router advertisement message includes a Home Network Prefix (HNP) of the terminal 10. In addition, the router advertisement message may include a flag for designating the address acquisition method of the terminal.

If the address acquisition method of the terminal is set to receive a floating IPv6 address from the DHCPv6 proxy or the server (eg, Flag == 1), in step S520, the terminal 10 solicits a DHCPv6 to the DHCPv6 proxy / relay 37. Start the DHCPv6 process by sending a (DHCPv6 Solicit) message. In this case, if the DHCPv6 server address is not included in the terminal profile information transmitted in step S502, the DHCPv6 proxy 37 provides a DHCPv6 proxy function according to a local policy, and if the terminal profile information includes a DHCPv6 server If the address is included, the DHCPv6 relay 37 transmits the DHCPv6 solicitation message to the corresponding DHCPv6 server 47.

If there is no DHCPv6 server address in the terminal profile information (i.e., a DHCPv6 proxy), first, in step S522, the DHCPv6 proxy 37 is a 128-bit HoA (home of Address) for the terminal according to a local policy (which is the terminal). DHCPv6 Advertisement (DHCPv6 Advertisement) message is transmitted. Then, in step S524, the terminal 10 transmits a DHCPv6 Request message to the DHCPv6 proxy 37, and in step S528, the DHCPv6 proxy 37 sends a DHCPv6 Reply message to the terminal 10. By transmitting to, the HoA allocation process of the terminal is completed. On the other hand, when there is a DHCPv6 server address in the terminal profile information (that is, a DHCPv6 relay), the DHCPv6 server 47 assigns a HoA to the terminal, and the DHCPv6 relay 37 is configured as the terminal 10 and the DHCPv6 server ( 47) serves as a relay between.

9 is a flowchart illustrating a method for supporting PMIPv6 in a wireless communication network according to a fifth embodiment of the present invention. For reference, a fifth embodiment of the present invention illustrates a process of renewing a PMIPv6 life time.

Referring to FIG. 9, in step S602, the AR / MAG 36 checks the remaining time for each PMIPv6 session to determine whether a threshold of a preset valid time is reached.

If the remaining time of the specific PMIPv6 session is not long, in step S604, the AR / MAG 36 sends a Proxy Binding Update message including a new valid time to extend the specific PMIPv6 session. Transmit to HAv6 / LMA 40.

Then, in step S606, the HAv6 / LMA 40 extends the corresponding PMIPv6 session to a new valid time, and transmits a proxy binding ACK message to the AR / MAG 36.

Upon receiving the proxy binding ACK message from the HAv6 / LMA 40, in step S608, the AR / MAG 36 applies a new valid time for that PMIPv6 session.

10 is a flowchart illustrating a method for supporting PMIPv6 in a wireless communication network according to a sixth embodiment of the present invention. For reference, the sixth embodiment of the present invention illustrates a process of performing a handover (PMIPv6 CSN Anchored Mobility) by the UE moving from the first subnet (ASN (a)) to the second subnet (ASN (b)). will be.

First, in step S702, the terminal 10 sends a Router Solicit message to know the routers available on the link. Then, the new AR / MAG 35b of the second subnet that has received the router solicitation message receives an anchor DPF HO trigger message to the previous AR / MAG 35a of the first subnet in step S704. Trigger R3 relocation by sending. Then, in step S706, the AR / MAG 35a of the first subnet transmits an anchor DPF HO Request message to the AR / MAG 35b of the second subnet. For reference, the above-described steps S702 to S706 are triggered by the new serving AR / MAG 35b. If the previous AR / MAG 35a attempts the R3 relocation procedure, steps S702 and S704 are omitted.

In step S708, the new serving AR / MAG 35b sends a Proxy Binding Update message to the HAv6 / LMA 40. Then, the HAv6 / LMA 40 sets a care of address (CoA) for the terminal 10 in the mobility binding entity and the AR of the second subnet in the AR / MAG 35a IPv6 address of the first subnet. / MAG 35b Changes to an IPv6 address to perform proxy binding updates. In operation S710, the HAv6 / LMA 40 transmits a proxy binding acknowledgment (ACK) message to the AR / MAG 35b of the second subnet, and tunnels the AR / MAG 35b of the second subnet. Create

Meanwhile, in step S712, the AR / MAG 35b of the second subnet receives a proxy binding ACK message from the HAv6 / LMA 40 to generate a tunnel for the HAv6 / LMA 40, and AR of the first subnet. Anchor DPF HO Response message is transmitted to / MAG 35a. Then, in step S714, the AR / MAG 35a of the first subnet transmits a proxy binding update message requesting deregistration to the HAv6 / LMA 40. Then, in step S716, the HAv6 / LMA 40 sends a proxy binding ACK message to the AR / MAG 35a in response and releases the tunnel between the previously formed AR / MAG 35a.

By this process, the tunnel formed between the AR / MAG 35a of the first subnet and the HAv6 / LMA 40 is released, and the AR / MAG 35b and the HAv6 / LMA 40 of the second subnet are released. If a new tunnel is formed between, in step S718, the AR / MAG 35b of the second subnet transmits a Router Advertisement message including the HNP of the terminal to the terminal 10, whereby the terminal is HoA Handover can be performed without changing the HNP.

11 is a flowchart of a method for supporting PMIPv6 in a wireless communication network according to a seventh embodiment of the present invention. For reference, the seventh embodiment of the present invention illustrates a process of releasing a PMIPv6 session by a terminal.

In step S802, the terminal 10 performs a DHCPv6 release procedure in association with a DHCPv6 proxy 37 or a DHCPv6 server 47. For reference, step S802 is a procedure required when the terminal sets up a PMIPv6 connection using DHCPv6 (see Embodiments 2 and 4), and is omitted when using an automatic address assignment scheme (see Embodiments 1 and 3). .

In step S804, the terminal 10 starts a network detachment procedure by transmitting a De-Registration Request (DEG-REQ) message including 'De-Registration_Request Code = 0x00' to the base station 20. In step S806, the base station 20 transmits a deregistration command (DREG-CMD) message including 'Action Code = 0x04' to the terminal 10. In addition, in step S808, the base station 20 transmits a path deregistration request (Path_Dreg_Req) message to the data path function (DPF) 28 through R6, and in step S810, the DPF 28 ) Forwards the route deregistration request message to the AR / MAG 36.

Then, in step S812, the AR / MAG 36 transmits a Proxy Binding Update message to the HAv6 / LMA 40. In this case, the lifetime included in the proxy binding update message is set to zero. Accordingly, the HAv6 / LMA 40 releases the session for the corresponding AR / MAG 36, and transmits a proxy binding ACK message to the AR / MAG 36 in step S814. AR / MAG 36 then releases the tunnel with HAv6 / LMA 40.

In step S816, the AR / MAG 36 transmits the network exit terminal state change request (NetExit_MS_State_Change_Request) message to the anchor Authenticator (AA) / Account Client (AC) 42 through R4, and in response, AA / AC ( 42, in step S818, transmits to the AR / MAG 36 the network exit terminal state change response (NetExit_MS_State_Change_Response) message. In this process, the terminal context indication (MS Context Indication) is deleted.

In operation S820, the AA / AC 42 transmits an Accounting Stop / DIAMETER ASR message indicating deregistration of the terminal to the AAA 45. In operation S822, the AA / AC 42 receives the AA / AC 42. Accounting Response / DIAMETER ASA message is sent to.

Meanwhile, in step S824, the AR / MAG 36 transmits a Path De-Registration Response (Path_Dreg_Rsp) message to the DPF 28 through R4, and in step S826, the DPF 28 sends R6. The route deregistration response message is transmitted to the base station 20. Then, in step S828, the base station 20 transmits a path deregistration ACK (Path_Dreg_Ack; Path De-Registration Acknowledge) message to the DPF 28 through R6, and finally, in step S830, the DPF 28 transmits R4. The route deregistration ACK message is transmitted to the AR / MAG 36.

12 is a flowchart of a method for supporting PMIPv6 in a wireless communication network according to an eighth embodiment of the present invention. For reference, the eighth embodiment of the present invention illustrates a process of AR / MAG releasing a PMIPv6 session.

First, in step S902, the AR / MAG 36 determines that the network needs to leave the terminal and requests for path deregistration including a 'Action Code TLV (Type Length Value)' indicating the terminal deregistration (Path_Dreg_Req; Path De-Registration Request) message is transmitted to the DPF 28 through R4.

Then, in step S904, the DPF 28 transmits a path deregistration request message to the base station 20 through R6, and in step S906, the base station 20 deregisters the terminal including 'Action Code = 0x00' to the terminal. Send a command (DREG-CMD; De-Registration Command).

In step S908, the terminal 10 performs a DHCPv6 release procedure in association with the DHCPv6 proxy 37 or the DHCPv6 server 47. For reference, step S908 is a procedure required when the terminal sets up a PMIPv6 connection using DHCPv6 (see Embodiments 2 and 4), and is omitted when using an automatic address assignment scheme (see Embodiments 1 and 3). .

Meanwhile, in step S910, the terminal 10 transmits a deregistration request (DREG_REQ) message including 'De-Registration_Request Code = 0x02' to the base station 20, and the base station 20 in step S912. Transmits a Path De-Registration Response (Path_Dreg_Rsp) message to the DPF 28 through R6. Then, in step S914, the DPF 28 transmits a path deregistration response message including a power down indication to the AR / MAG 36 through R4, and in step S916, the AR / MAG 36 ) Transmits a path deregistration acknowledgment (ACK) message to the DPF 28 via R4. Then, in step S918, the DPF 28 delivers a path deregistration ACK message to the base station 20 through R6.

Meanwhile, in step S920, the AR / MAG 36 transmits a proxy binding update message to the HAv6 / LMA 40. In this case, the lifetime included in the proxy binding update message is set to zero. Accordingly, the HAv6 / LMA 40 releases the session for the corresponding AR / MAG 36 and transmits a proxy binding ACK message to the AR / MAG 36 in step S922. AR / MAG 36 then releases the tunnel with HAv6 / LMA 40.

In step S924, the AR / MAG 36 transmits a network exit terminal state change request (NetExit_MS_State_Change_Request) message to the anchor Authenticator (AA) / Account Client (AC) 42 through R4, and in response, AA / AC ( 42, in step S926, sends a network exit terminal state change response (NetExit_MS_State_Change_Response) message to the AR / MAG 36. In this process, the terminal context indication (MS Context Indication) is deleted.

In operation S928, the AA / AC 42 transmits an Accounting Stop / DIAMETER ASR message indicating the deregistration of the terminal to the AAA 45. In operation S930, the AA / AC 42 transmits the AA / AC 42. Accounting Response / DIAMETER ASA message is sent to.

13 is a flowchart of a method for supporting PMIPv6 in a wireless communication network according to a ninth embodiment of the present invention. For reference, the ninth embodiment of the present invention illustrates a process in which AAA releases a PMIPv6 session.

First, in step S1002, the AAA 45 determines the deregistration of the terminal according to the change of the service strategy, and transmits a RADIUS Disconnect message or a DIAMETER STR message to the AA / AC 42. Then, in step S1004, the AA / AC 42 sends a RADIUS Disconnect ACK message or a DIAMETER STA message to the AAA 45.

In operation S1006, the AA / AC 42 transmits a network exit terminal state change request (NetExit_MS_State_Change_Request) message to the AR / MAG 36, and in step S1008, the AR / MAG 36 deregisters the terminal. A Path De-Registration Request (Path_Dreg_Req) message including the indicated Action Code TLV (Type Length Value) is transmitted to the DPF 28 through R4.

Then, in step S1010, the DPF 28 delivers a path deregistration request message to the base station 20 through R6, and in step S1012, the base station 20 includes 'Action Code = 0x00' to the terminal 10. A De-Registration Command (DREG-CMD) message is transmitted.

In step S1014, the terminal 10 performs a DHCPv6 release procedure in association with the DHCPv6 proxy 37 or the DHCPv6 server 47. For reference, step S1014 is a procedure required when the terminal has set up a PMIPv6 connection using DHCPv6 (see Embodiments 2 and 4), and is omitted when using an automatic address assignment scheme (see Embodiments 1 and 3). .

Meanwhile, in step S1016, the terminal 10 transmits a deregistration request (DREG_REQ) message including 'De-Registration_Request Code = 0x02' to the base station 20, and the base station 20 in step S1018. Transmits a Path De-Registration Response (Path_Dreg_Rsp) message to the DPF 28 through R6. Then, in step S1020, the DPF 28 transmits a path deregistration response message including a power down indication to the AR / MAG 36 via R4, and in step S1022, the AR / MAG 36 Transmits a path de-registration acknowledgment (ACK) message to the DPF 28 through R4. Then, in step S1024, the DPF 28 transmits a path deregistration ACK message to the base station 20 through R6.

Meanwhile, in step S1026, the AR / MAG 36 transmits a Proxy Binding Update message to the HAv6 / LMA 40. In this case, the lifetime included in the proxy binding update message is set to zero. Accordingly, the HAv6 / LMA 40 releases the session for the corresponding AR / MAG 36, and transmits a proxy binding ACK message to the AR / MAG 36 in step S1028. AR / MAG 36 then releases the tunnel with HAv6 / LMA 40.

In step S1030, the AR / MAG 36 transmits the network exit terminal state change request (NetExit_MS_State_Change_Request) message to the anchor Authenticator (AA) / Account Client (AC) 42 through R4, and in response, AA / AC ( 42 transmits a network exit terminal state change response (NetExit_MS_State_Change_Response) message to the AR / MAG 36 in step S1032. In this process, the terminal context indication (MS Context Indication) is deleted.

In operation S1034, the AA / AC 42 transmits an Accounting Stop / DIAMETER ASR message indicating the deregistration of the terminal to the AAA 45, and in operation S1036, the AAA 45 receives the AA / AC 42. Accounting Response / DIAMETER ASA message is sent to.

14 is a flowchart illustrating a method for supporting PMIPv6 in a wireless communication network according to a tenth embodiment of the present invention. For reference, a tenth embodiment of the present invention illustrates a PMIPv6 connection setup process using Dynamic Host Configuration Protocol version 6 (DHCPv6).

As shown in FIG. 14, a system supporting PMIPv6 in a wireless communication network according to a tenth embodiment of the present invention includes a terminal 10, a base station 20, an access router (AR) / mobility access gateway (MAG) 36. ), Dynamic Host Configuration Protocol version 6 (DHCPv6) Proxy / Relay (37A), Authentication, Authorization, Accounting (AAA), DHCPv6 Server (47A), Localized Mobility Anchor (LMA) (40) ), And the like.

First, in step S1102, the terminal 10 performs a network entry procedure, an initial authentication procedure, etc. in conjunction with the base station 20, AR / MAG 36, AAA 45, and the like. do. In the initial authentication procedure, the AR / MAG 36 downloads subscriber profile information including the IPv6 address of the LMA 40 from the AAA 45. For reference, the terminal profile information may optionally include a home network prefix (HNP), which is a prefix of an IPv6 address to be used as a home of address (HoA) of the terminal 10, wherein the HNP is included in each terminal in a subnet. Uniquely allocated. In addition, the terminal profile information may include a DHCPv6 server address. If the DHCPv6 server address is included, the ASN (Access Service Network) provides a DHCPv6 relay function, and if the DHCPv6 server address is not included, the ASN is DHCPv6. Proxies are provided.

When the network entry and authentication procedure is completed, in step S1104, Service Flow Authorization (SFA) of the ASN is an IPv6 CS between the terminal 10 and the AR / MAG 36 using a link local address of the terminal. It forms an Initial Service Flow (ISF) for a Convergence Sublayer. And, thereby, the terminal 10 and the AR / MAG 36 can transmit and receive IPv6 packets on the IPv6 CS.

In step S1106, the AR / MAG 36 sends a Proxy Binding Update message to the LMA 40. For reference, the LMA 40 is specified in the terminal profile information downloaded from the AAA 45 by the AR / MAG 36 in the initial authentication process, and the AR / MAG 36 indicates the HNP of the terminal in the terminal profile information. (Home Network Prefix) is included and transmitted in the proxy binding update message. The proxy binding update message may include a terminal identifier, a handover (HO) option, an access technology type (ATT) option, a link local address option, an HNP option, and the like.

After receiving the proxy binding update message, in step S1108, the LMA 40 sends the AR / MAG 36 to the AAA 45 by sending a Remote Authentication Dial In User Service (RADIUS) Access-Request message or a DIAMETER MAR message. Ask for authentication. And, if in-band security is possible, the LMA 40 retrieves all the necessary keying information from the AAA 45. Then, in step S1110, the AAA 45 transmits a RADIUS Access-Accept message or DIAMETER MAA message to the LMA 40 in response thereto, and the LMA 40 receives the LMA 40 to update the location of the terminal 10. Here, the location update of the UE matches the mobility network entity of the LMA 40 by matching an HNP (Home Network Prefix) assigned to the UE with an IPv6 address of the AR / MAG 36 (which becomes the CoA of the UE). ) Means to perform a proxy binding update. Then, the LMA 40 generates a tunnel for the AR / MAG 36, and transmits a packet having the HNP of the terminal as the destination address to the AR / MAG 36 through the tunnel. For reference, if there is no HNP of the UE in the proxy binding update message transmitted from the AR / MAG 36, the LMA 40 may be implemented to allocate the HNP of the UE by itself, in this case by steps S1108 and S1110. The HNP to be used for the PMIPv6 session of the terminal may be allocated and confirmed.

Meanwhile, in step S1112, the LMA 40 transmits a Proxy Binding Acknowledgment (ACK) message to the AR / MAG 36, and at this time, the Proxy Binding ACK message includes the MS's assigned prefix in the HNP option. prefix (eg, HNP of the UE), and may include a handover indicator option, an access technology type (ATT) option, a link local address option, and the like. And, accordingly, the AR / MAG 36 generates a tunnel for transmitting the packet transmitted from the terminal to the LMA 40. For reference, the tunnel between the LMA 40 and the AR / MAG 36 is for relaying IPv6 packet transmission and reception between the UE 10 and the Corresponding Node (CN) 50 in MIPv6. -in-IP, Generic Routing Encapsulation (GRE) can be used.

On the other hand, if an Initial Service Flow (ISF) is formed, in step S1114, the terminal 10 configures a link local address and performs a duplicate address detection (DAD) process. Then, in step S1116, a Router Solicitation message is sent to the AR / MAG 36 to know the available routers on the link.

Then, in step S1118, the AR / MAG 36 transmits a Router Advertisement message to the terminal 10. The router advertisement message includes Home Network Prefix (HNP) information included in the prefix information option. do. In addition, the router advertisement message may include a flag for designating the address acquisition method of the terminal.

If the address acquisition method of the terminal is set to be assigned a floating IPv6 address from the DHCPv6 proxy or the server (eg, Flag == 1), in step S1120, the terminal 10 connects to the terminal with a DHCPv6 proxy / relay 37A. The DHCPv6 process is initiated by sending a DHCPv6 Solicitation message containing the relevant HNP. In this case, if the terminal profile information transmitted in step S1102 does not include a DHCPv6 server address, the DHCPv6 proxy 37A provides a DHCPv6 proxy function according to a local policy, and if the terminal profile information includes a DHCPv6 server If the address is included, the DHCPv6 relay 37A transmits the DHCPv6 solicitation message to the corresponding DHCPv6 server 47A.

If there is no DHCPv6 server address in the terminal profile information (i.e., a DHCPv6 proxy), first, in step S1122, the DHCPv6 proxy 37A is assigned a 128bits HoA (home of address) for the terminal according to a local policy (this is HNP). Generated based on the IP address), and then transmits a DHCPv6 Advertisement message. Then, in step S1124, the terminal 10 transmits a DHCPv6 Request message including the HNP associated with the terminal to the DHCPv6 proxy 37A, and in step S1126, the DHCPv6 proxy 37A sends the assigned HoA. By transmitting a DHCPv6 Reply (DHCPv6 Reply) message to the terminal 10, the HoA allocation process of the terminal is completed. On the other hand, when there is a DHCPv6 server address in the terminal profile information (that is, a DHCPv6 relay), the DHCPv6 server 47A assigns a HoA to the terminal, and the DHCPv6 relay 37A is configured to the terminal 10 and the DHCPv6 server ( It acts as a relay between 47A).

15 is a flowchart illustrating a method for supporting PMIPv6 in a wireless communication network according to an eleventh embodiment of the present invention. For reference, the eleventh embodiment of the present invention illustrates a PMIPv6 connection setup process using an automatic address assignment method.

As shown in FIG. 15, a system supporting PMIPv6 in a wireless communication network according to an eleventh embodiment of the present invention includes a terminal 10, a base station 20, an access router (AR) / mobility access gateway (MAG) 36. ), AAA (Authentication, Authorization, Accounting) 45, LMA (Localized Mobility Anchor) 40, and the like.

First, in step S1202, the terminal 10 performs a network entry procedure, an initial authentication procedure, etc. in conjunction with the base station 20, AR / MAG 36, AAA 45, and the like. do. In the initial authentication procedure, the AAA 45 downloads subscriber profile information for the PMIPv6 service to the AR / MAG 36, which includes the IPv6 address of the LMA 40. do. The terminal profile information may optionally include a home network prefix (HNP), which is a prefix of an IPv6 address to be used as a home of address (HoA) of the terminal, wherein the HNP is unique for each terminal in a subnet. Is allocated.

When the network entry and authentication procedure is completed, in step S1204, Service Flow Authorization (SFA) of the ASN is an IPv6 CS between the terminal 10 and the AR / MAG 36 using a link local address of the terminal. It forms an Initial Service Flow (ISF) for a Convergence Sublayer. And, thereby, the terminal 10 and the AR / MAG 36 can transmit and receive IPv6 packets on the IPv6 CS.

In step S1206, the AR / MAG 36 sends a Proxy Binding Update message to the LMA 40. For reference, the LMA 40 is specified in the terminal profile information downloaded from the AAA 45 by the AR / MAG 36 in the initial authentication process, and the AR / MAG 36 includes the HNP in the terminal profile information. If so, the HNP option is included in the proxy binding update message and transmitted.

After receiving the proxy binding update message, in step S1208, the LMA 40 sends the AR / MAG 36 to the AAA 45 by sending a Remote Authentication Dial In User Service (RADIUS) Access-Request message or a DIAMETER MAR message. Ask for authentication. Then, in step S1210, the AAA 45 transmits a RADIUS Access-Accept message or a DIAMETER MAA message to the LMA 40 in response thereto, and the LMA 40 receiving the AMA 45 receives a Home Network Prefix (HNP) and an AR of the terminal. Proxy Binding Update is performed by matching the IPv6 address of the / MAG 36 (which becomes the CoA of the UE) and registering it with the Mobility Binding Entity of the LMA 40. Then, the LMA 40 generates a tunnel for the AR / MAG 36, and transmits a packet having the HNP of the terminal as the destination address to the AR / MAG 36 through the tunnel. For reference, if there is no HNP of the UE in the proxy binding update message transmitted from the AR / MAG 36, the LMA 40 may be configured to allocate the HNP of the UE by itself.

Meanwhile, in step S1212, the LMA 40 transmits a proxy binding acknowledgment (ACK) message to the AR / MAG 36, wherein the proxy binding ACK message includes the HNP of the terminal 10. And, accordingly, the AR / MAG 36 generates a tunnel capable of transmitting the packet transmitted from the terminal to the LMA 40. For reference, the tunnel between the LMA 40 and the AR / MAG 36 is for relaying IPv6 packet transmission and reception between the UE 10 and the Corresponding Node (CN) 50 in MIPv6. -in-IP, Generic Routing Encapsulation (GRE) can be used.

On the other hand, if an Initial Service Flow (ISF) is formed, in step S1214, the terminal 10 configures the link local address and performs a duplicate address detection (DAD) process. Then, in step S1216, a Router Solicitation message is sent to the AR / MAG 36 to know the available routers on the link.

Then, in step S1218, the AR / MAG 36 transmits a Router Advertisement message to the terminal 10. The router advertisement message includes a terminal unique prefix Home Network Prefix (HNP). . In addition, the router advertisement message may include a flag for designating the address acquisition method of the terminal.

If the address acquisition method of the terminal is set to auto-configuration through DAD (Duplicate Address Detection) (eg, Flag == 0), in step S1220, the terminal 10 is included in the router advertisement message. A global IPv6 address (ie, HoA (Home of Address)) of the terminal is generated by using the HNP (Home Network Prefix) and the interface ID (IID) of the terminal. And, optionally, the terminal 10 may perform a duplicate address detection (DAD) process again to confirm whether the automatically generated IPv6 address is unique on the network.

16 is a flowchart illustrating a method for supporting PMIPv6 in a wireless communication network according to a twelfth embodiment of the present invention. For reference, the twelfth embodiment of the present invention illustrates a process of releasing a PMIPv6 session by an AR / MAG or a terminal.

First, when the AR / MAG 36 releases the PMIPv6 session, if the AR / MAG 36 finds a reason to stop the PMIPv6 session, the AR / MAG 36 indicates an action code TLV (Type Length Value) indicating the deregistration of the terminal. Path Deregistration Request (Path_Dreg_Req; Path De-Registration Request) message is transmitted to the DPF through the R4 path, and the DPF 28 again transmits a path deregistration request message to the base station 20 through the R6 path. To pass. Then, the base station 20 transmits a De-Registration Command (DREG-CMD) message including 'Action Code = 0x00' to the terminal 10.

Meanwhile, in step S1302, the terminal performs a DHCPv6 / v4 release procedure in association with the DHCP proxy / relay 37 and the DHCP server 47 in response to a request of the AR / MAG 36 or by its own decision. For reference, step S1302 is a necessary procedure when the UE has set up a PMIPv6 connection setup using DHCPv6 / DHCPv4, and thus is omitted when the automatic address allocation scheme is used.

Thereafter, the terminal 10 transmits a De-Registration Request (DREG_REQ) message including 'De-Registration_Request Code = 0x02' to the base station 20, and the base station 20 again transmits through the R6 path. When a Path De-Registration Response (Path_Dreg_Rsp) message is sent to the DPF, the DPF sends a path deregistration response message including a power down indication to the AR / MAG 36 via the R4 path. send.

In operation S1304, the AR / MAG 36 transmits a Proxy Binding Update message to the LMA 40. In this case, the proxy binding update message includes an HNP (or IPv4 HoA) and a handover indicator (HOI) (value = 4) assigned to the terminal, and a lifetime for the terminal is set to zero.

Then, in step S1306, the LMA 40 releases the session for the corresponding AR / MAG 36 and transmits a Proxy Binding Acknowledge (ACK) message to the AR / MAG 36. If deregistration is successful, the proxy binding ACK message contains the same HNP and handover indicator (value = 4) as the value included in the proxy binding update message sent from AR / MAG 36, and the PBA status field is 0. Is set.

For reference, after that, the AR / MAG 36 transmits a network exit terminal state change request (NetExit_MS_State_Change_Request) message to the AA (Anchor Authenticator) 42 through the R4 path, and in response, the AA 42 sends an AR / The network exit terminal state change response (NetExit_MS_State_Change_Response) message is transmitted to the MAG 36. In this process, the terminal context indication (MS Context Indication) is deleted. In addition, the AA 42 transmits an Accounting Stop / DIAMETER ASR message instructing the AAA 45 to unregister the terminal, and accordingly, the AAA 45 transmits an Accounting Response / DIAMETER ASA message to the AA 42. .

17 is a flowchart illustrating a method for supporting PMIPv6 in a wireless communication network according to a thirteenth embodiment of the present invention. For reference, the thirteenth embodiment of the present invention illustrates a process in which AAA releases a PMIPv6 session.

First, in step S1402, the AAA 45 determines the deregistration of the terminal according to the change of the service strategy, and transmits a RADIUS Disconnect message or a DIAMETER STR message to the AA 42. Then, in step S1404, the AA 42 sends a RADIUS Disconnect ACK message or a DIAMETER STA message to the AAA 45.

In operation S1406, the AA 42 transmits a network exit terminal state change request (NetExit_MS_State_Change_Request) message to the AR / MAG 36. Then, in step S1408, the AR / MAG 36 sends a Path De-Registration Request (Path_Dreg_Req) message including an 'Action Code Type Length Value (TLV)' indicating that the UE is deregistered. Through the DPF, the DPF 28 transmits a path deregistration request message to the base station 20 through the R6 path, and the base station sends a deregistration command including 'Action Code = 0x00' to the terminal 10. Sends a (DREG-CMD; De-Registration Command) message.

Meanwhile, in step S1410, the terminal performs a DHCPv6 / v4 release procedure in cooperation with the DHCP proxy / relay 37 and the DHCP server 47 in response to the request of the AR / MAG 36. For reference, step S1410 is a necessary procedure when the UE has set up a PMIPv6 connection setup using DHCPv6 / DHCPv4, and thus the step S1410 is omitted in the case of using the automatic address assignment method.

In operation S1412, the AR / MAG 36 transmits a Proxy Binding Update message to the LMA 40. In this case, the proxy binding update message includes an HNP (or IPv4 HoA) and a handover indicator (HOI) (value = 4) assigned to the terminal, and a lifetime for the terminal is set to zero.

Then, in step S1414, the LMA 40 releases the session for the corresponding AR / MAG 36 and transmits a Proxy Binding Acknowledge (ACK) message to the AR / MAG 36. If the deregistration is successful, the proxy binding ACK message contains the same HNP and handover indicator (value = 4) as the value included in the proxy binding update message sent from AR / MAG 36, and the PBA status field is 0. Is set.

18 is a flowchart of a method of supporting PMIPv6 in a wireless communication network according to a fourteenth embodiment of the present invention. For reference, the fourteenth embodiment of the present invention illustrates a process in which the LMA releases a PMIPv6 session.

If the reason for stopping the PMIPv6 session for the terminal occurs, in step S1502, the LMA 45 transmits a Binding Revocation Indication (BRI) message to the AR / MAG 36 to which the terminal belongs. For reference, the binding cancellation indication message may have a 'A' and a 'P' bit set, and may include a terminal identifier and a corresponding HNP (or IPv4 HoA). And, if the initial binding registration for the terminal is protected by the authentication extension option (authentication extension option), the binding cancellation message is also protected in the same way.

When the AR / MAG 36 receives a valid unbind message from the LMA 45, the AR / MAG 36 initializes data path deregistration along the R4 / R6 path to the serving base station of the terminal. In operation S1504, the AR / MAG 36 transmits a Binding Revocation Acknowledgment (BRA) message to the LMA 40. The binding cancel confirmation message has a 'P' bit set and a corresponding code indicated in a status field. Then, after receiving the binding cancellation confirmation message, LMA 40 changes the mobility binding entity (Mobility Binding Entity) for the terminal and releases the previously generated associated tunnel.

On the other hand, if the IP address is generated through the PMIPv6 connection setup using DHCPv6 / DHCPv4, in step S1506, the terminal 10 in response to the request of the AR / MAG 36 DHCP proxy / relay 37, DHCP server In conjunction with (47), the DHCPv6 / v4 release procedure is performed.

Although the present invention has been described in detail with reference to preferred embodiments, it will be apparent to those skilled in the art that the present invention may be embodied in other specific various forms without changing the technical spirit or essential features of the present invention. One embodiment is to be understood in all respects as illustrative and not restrictive.

In addition, the scope of the present invention is specified by the appended claims rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and equivalent concepts are included in the scope of the present invention. Should be interpreted as

Claims

Subscriber profile information including address of HA (Home Agent) / Localized Mobility Anchor (LMA) and Home Network Prefix (HNP) from AAA (Authentication, Authorization, Accounting) server during network entry and authentication of UE Receiving;

Transmitting a message requesting a proxy binding update including the HNP to the HA / LMA corresponding to the address of the HA / LMA; And

In response to the acknowledgment (Acknowledge) of the proxy binding update transmitted from the HA / LMA, PMIPv6 in a wireless communication network comprising the step of transmitting a Router Advertisement message containing HNP information to the terminal How to support it.
The method of claim 1,

The HNP information is a method for supporting PMIPv6 in a wireless communication network, characterized in that the unique network prefix (Network Prefix) information for setting the address of the terminal.
The method of claim 2,

The HNP information is a method for supporting PMIPv6 in a wireless communication network, characterized in that the HNP (Home Network Prefix).
The method of claim 1,

The terminal further comprises the step of assigning a Home of Address (HoA) including the HNP of the terminal by the automatic configuration (Auto configuration) PMIPv6 supporting method in a wireless communication network.
The method of claim 1,

Transmitting, by the terminal, a DHCPv6 Solicitation (DHCPv6 Solicitation) message including the HNP to a Dynamic Host Configuration Protocol version 6 (DHCPv6) server;

The DHCPv6 server assigning a home of address (HoA) including the HNP to the terminal, and then transmitting a DHCPv6 advertisement message to the terminal;

Transmitting, by the terminal, a DHCPv6 Request message to the DHCPv6 server in response to the DHCPv6 Advertisement message; And

The DHCPv6 server further comprises the step of transmitting a DHCPv6 Reply (DHCPv6 Reply) message including the assigned HoA to the terminal supporting PMIPv6 in a wireless communication network.
The method of claim 1,

After sending the router advertisement message,

If the terminal leaves the network, the method further comprises the step of re-requesting the proxy binding update to the HA / LMA.
The method of claim 1,

After requesting the proxy binding update,

And forming a tunnel for transmitting IPv6 packets for the terminal between the HA / LMA and AR / MAG.
The method of claim 7, wherein

The proxy binding update is a method for supporting PMIPv6 in a wireless communication network, characterized in that performed by matching the HNP and the address of the AR / MAG of the terminal.
The method of claim 1,

Prior to the step of requesting the proxy binding update,

And forming an Internet Protocol version 6 (IPF) Initial Service Flow (ISF) with the terminal.
The method of claim 1,

After requesting the proxy binding update,

And forming an Internet Protocol version 6 (IPF) Initial Service Flow (ISF) with the terminal.
The IPv6 packet is transmitted to an Internet Protocol version 6 (IPv6) packet having a HoA (Home of Address) of a terminal as a destination address to a care of address (CoA) of the terminal that matches a prefix of the destination address. HA / LMA; And

A system for supporting PMIPv6 in a wireless communication network having the same IPv6 address as the CoA of the terminal and including an AR / MAG for transmitting the IPv6 packet transmitted from the HA / LMA to the terminal.
The method of claim 11,

Supporting PMIPv6 in the wireless communication network further comprises an AAA (Authentication, Authorization, Accounting) server that provides the terminal profile (profile) information including the IPv6 address of the HA / LMA supporting the mobility of the terminal system.
The method of claim 11,

A system for supporting PMIPv6 in a wireless communication network, characterized in that to form a tunnel (tunnel) for transmitting the IPv6 packet for the terminal between the HA / LMA and the AR / MAG.
The method of claim 11,

The HoA of the terminal is a system supporting PMIPv6 in a wireless communication network comprising a 64bits HNP (Home Network Prefix).
The method of claim 11,

In the wireless communication network, the AR / MAG transmits a Proxy Binding Update message to the HA / LMA when the UE enters or leaves the subnet to which the AR / MAG belongs. Systems that support PMIPv6.
The method of claim 11,

The terminal supports the PMIPv6 in a wireless communication network, characterized in that the HoA is assigned by DHCPv6 (Dynamic Host Configuration Protocol version 6) or automatic address assignment (Auto configuration).
Checking a remaining time for a PMIPv6 session of at least one terminal;

When the remaining time of a specific PMIPv6 session reaches a preset validity time threshold, the proxy binding update including the HNP of the terminal corresponding to the specific PMIPv6 session and a new valid time for extending the specific PMIPv6 session (Proxy) Sending a Binding Update) message to the HA / LMA; And

Receiving a Proxy Binding Acknowledge (ACK) message from the HA / LMA confirming the extension of the valid time of the particular PMIPv6 session, and extending the PMIPv6 session.
The method of claim 17,

And wherein the proxy binding update message includes a handoff option indicating that the proxy binding update message does not change to a handoff state.
Transmitting, by the UE, AR / MAG to a De-Registration Request (DEG-REQ) message requesting the release of a PMIPv6 session;

Transmitting, by the AR / MAG, a Proxy Binding Update message including a HNP of the terminal and a lifetime set to 0 for the terminal to HA / LMA; And

Releasing, by the HA / LMA, the session for the terminal with the AR / MAG based on the HNP, and transmitting a proxy binding acknowledgment (ACK) message including the HNP to the AR / MAG. How to support PMIPv6 in wireless network.
The method of claim 19,

Prior to sending the deregistration request message,

And performing a DHCPv6 release procedure between the terminal and the DHCP server.
The method of claim 19,

Prior to sending the deregistration request message,

If the AR / MAG determines that network exit is necessary for the terminal, requesting release of the PMIPv6 session to the terminal, wherein the method further supports PMIPv6 in the wireless communication network.
Transmitting, by the AAA server, a RADIUS or DIAMETER message requesting the terminal to terminate a PMIPv6 session to a gateway of an access service network (ASN);

A gateway of the ASN transmitting a RADIUS or DIAMETER message in response to a request for terminating a PMIPv6 session of the terminal to the AAA, and a data path function (DPF) of the ASN changing the state of the terminal;

Initiating a data path deregistration procedure by the gateway of the ASN, and performing a DHCPv6 deactivation procedure by the terminal according to the deregistration request of the base station;

Transmitting, by the base station, a data path release response to the gateway of the ASN in response to the deregistration request; And

Performing a binding update procedure by the gateway of the ASN to release the PMIPv6 session with HA / LMA according to the data registration path release response.
The method of claim 22,

After the above binding update procedure

And performing the R4 / R6 data path release procedure.
The method of claim 22,

After the above binding update procedure

The gateway of the ASN further comprises the step of notifying the end of the charge to the AAA server to support PMIPv6 in a wireless communication network.
Transmitting, by the HA / LMA, a Binding Revocation Indication (BRI) message including the HNP of the terminal to the AR / MAG;

Sending, by the AR / MAG, a Binding Revocation Acknowledgment (BRA) message in response to the Binding Revocation Instruction message to the HA / LMA, and requesting a data path deregistration to the base station; And

And performing, by the terminal, a DHCPv6 release procedure according to the deregistration request of the base station.