KR100917924B1 - System for providing mobile internet procotol using Dynamic Home Agent Discovery, terminal and method thereof - Google Patents

Abstract

The present invention relates to a mobile Internet protocol providing system, a terminal, and a method using dynamic home agent assignment.

According to the present invention, a mobile Internet protocol providing system includes a home agent proxy server and a plurality of home agents. The home agent proxy server manages state information of each of the plurality of home agents. The home agent proxy server receives a home agent request for mobile internet protocol registration from the terminal and provides the terminal with the home agent information allocated based on the status information. The plurality of home agents transmits the state information according to the mobile Internet protocol registration process for the terminal to the home agent proxy server. The plurality of home agents perform mobile internet protocol registration processing of the terminal using the assigned home agent information based on the state information of each home agent. Therefore, the home agent proxy server managing the state information of the plurality of home agents can efficiently allocate the home agents in consideration of load distribution of each home agent.

Dynamic Home Agent Assignment, Mobile Internet Protocol Enrollment, Co-Located Care of Address (CCOA)

Description

System for providing mobile internet protocol using mobile home agent allocation, terminal and method thereof

The present invention relates to a mobile Internet protocol providing system, a terminal, and a method using dynamic home agent assignment. More specifically, using the Co-Located Care of Address (CCOA) Dynamic Home Agent Discovery (CCOA) method to provide the Mobile Internet Protocol (hereinafter referred to as 'mobile IP') It relates to a system, a terminal, and a method thereof.

The development of the existing Internet is dominated by wire-based infrastructure. Recently, however, there is a trend that the infrastructure that guarantees mobility in wireless based wireless LAN, CDMA, WCDMA, WiBro wireless data services, etc. has been in the spotlight.

In order to guarantee mobility throughout wired and wireless, a method using mobile IP is mainly used, and roaming of heterogeneous manganese is widely used.

In order to guarantee mobility in the mobile IP, the terminal is assigned two IP addresses. One is a fixed 'home IP address' and the other is a 'post-moving IP address' that the terminal acquires when it moves from the home network to an external network.

Here, 'IP address after moving' is a secondary address (hereinafter referred to as 'CoA') obtained from an agent advertisement message of a foreign agent (FA) that is a router of an external network, and belongs to an external network. Among IP addresses, there is a common co-located care-of address (Co-Located Care of Address (hereinafter referred to as 'CCOA')) manually set by the terminal.

1 is a flowchart illustrating a dynamic home agent reference method using CoA in a conventional CDMA network.

As shown in FIG. 1, the terminal includes a base station system (Base Transceiver Station (BTS) / Base Station Controller (BSC) / Packet Control Function (PCF)) and a Packet Data Service Node (PDSN). After each access process (S11, S13, S15), the Agent Solicitation message is transmitted to the PDSN (S17) to receive an Agent Advertisement message (S19).

When the PDSN receives the Mobile IP Registration Request message from the terminal (S21), the PDSN transmits an access request message to the AAA server (S23) and includes an access response including an HA list recommended by the AAA. Response) message is received (S25). The mobile IP registration request message is transmitted to the selected HA with reference to the received HA list (S27), and when a response is received (S29), it is transmitted to the terminal (S31).

As described above, in the conventional dynamic home agent reference method, AAA (Authentication Authorization) is not an IP address of an HA in which a home agent (hereinafter, referred to as 'HA') to which a terminal sends a mobile IP registration request message is fixed. It uses a random HA configured in Accounting).

2 is a flowchart illustrating a mobile IP access method using CCOA in a conventional CDMA network.

As shown in FIG. 2, the terminal receives an agent advertisement message by transmitting an agent request message to a fixed HA (S47) after a connection process (S41, S43, S45) with BTS / BSC / PCF and PDSN ( S49). Then, the terminal transmits a mobile IP registration request message to the HA (S51). When the HA transmits an access request message to the AAA server (S53) and receives an access response message (S55), the HA transmits a mobile IP registration response message to the terminal (S57).

As such, the conventional CCOA method uses a fixed IP address of the HA on the terminal itself, so that dynamic home agent allocation is not performed.

Therefore, in the conventional method of dynamically allocating a home agent, as shown in FIG. 1, the terminal must pass through the PDSN and refer to the mobile IP method using CoA in a manner in which the PDSN distributes calls according to the response of the AAA server. Standardization is mostly.

On the other hand, as shown in Figure 2, the mobile IP method using the CCOA has not yet been discussed in detail about the method for dynamically assigning the home agent.

Therefore, a technical problem to be achieved by the present invention is a system for providing a mobile IP that implements efficient home agent dynamic allocation in consideration of the load status of the home agent in the mobile IP access method using the CCOA terminal directly connected to the home agent To provide a terminal and a method thereof.

The mobile Internet protocol providing system according to a feature of the present invention in order to achieve the problem as described above,

In the mobile Internet protocol providing system using dynamic home agent allocation, a home agent assigned to the mobile agent is managed based on the status information by managing the state information of each of the plurality of home agents and receiving a home agent request for mobile internet protocol registration from the terminal. A home agent proxy server providing information to the terminal; And transmitting the state information according to the mobile internet protocol registration process for the terminal to the home agent proxy server, and performing the requested mobile internet protocol registration process using the home agent information provided from the home agent proxy server. It includes a plurality of home agents.

Terminal device according to a feature of the invention,

A terminal for providing a mobile internet protocol using dynamic home agent allocation, the terminal comprising: a memory for storing an internet protocol address of a home agent proxy server managing state information of each of a plurality of home agents; And a mobile internet protocol processor for requesting mobile internet protocol registration using address information of a home agent obtained from the home agent proxy server connected using the internet protocol address stored in the memory.

Mobile Internet protocol providing method according to a feature of the present invention,

A method for providing a mobile internet protocol using dynamic home agent assignment, the method comprising: requesting home agent information for mobile internet protocol registration to a home agent proxy server managing state information of each of a plurality of home agents; Receiving selected home agent address information based on state information of each of the home agents from the home agent proxy server; And requesting registration of a mobile internet protocol by using the received home agent address information.

According to the present invention, the terminal connects to an HA proxy server that manages state information of a plurality of HAs, and requests mobile IP registration to the HA assigned by the HA proxy server.

Therefore, a method of dynamically allocating a home agent to a mobile IP access method using CCOA, which is not proposed in the related art, can be implemented.

In addition, since the HA proxy server directly accesses to the assigned HA in consideration of the load distribution of the HA and performs mobile IP registration, it is possible to efficiently implement the actual HA allocation and deployment during dynamic HA allocation.

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, terms such as “… unit”, “… module” described in the specification mean a unit that processes at least one function or operation, which may be implemented by hardware or software or a combination of hardware and software.

Now, a mobile internet protocol providing system, a terminal, and a method using dynamic home agent allocation according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of a system for providing a mobile IP using dynamic home agent allocation according to an embodiment of the present invention.

According to FIG. 1, a mobile IP providing system includes a terminal 100, a base station apparatus 200 ′, 200 ″, an exchange station 300 ′, 300 ″, an authentication authorization accounting (AAA) 400, a home agent (Home) Agent, hereinafter referred to as 'HA') proxy server 500 and a plurality of HA (600).

The terminal 100 is a mobile terminal capable of communicating while carrying a mobile subscriber having a variety of voice, data, video, and the like. The terminal 100 transmits / receives data packets desired by the subscriber through the IP network. The terminal 100 is a mobile node moving from the first subnet to the second subnet.

The terminal 100 implements the mobile IP using the CCOA scheme with the HAs 601 and 603 of the plurality of HAs 600 through the HA proxy server 500.

The base station devices 200 'and 200' 'are the serving base station device 200' located in the first subnet and the target base station device 200 '' located in the second subnet. The base station apparatus 200 ′, 200 ″ is connected to the terminal 100 and is responsible for wireless transmission of packet data transmitted and received by the terminal 100 from an IP network.

The base station apparatus 200 ', 200' 'is a base transceiver station (hereinafter referred to as' CDMA') network of Code Division Multiple Access (hereinafter referred to as' CDMA '), a base station controller ( Base Station Controller, hereinafter referred to as 'BSC') and Packet Control Function (hereinafter referred to as 'PCF'). In addition, Node B (hereinafter, referred to as 'node-B') and Radio Network Controller (hereinafter referred to as 'RNC') of a wideband code division multiple access (WCDMA) network. 'Describe'. It also includes a WiBro base station (Radio Access Station, hereinafter referred to as "RAS") of the WiBro network.

Switching stations 300 ', 300 " are serving switching stations 300' located in the first subnet and target switching stations 300 " located in the second subnet. The switching centers 300 ′ and 300 ″ perform an IP routing function on the terminal 100 accessing the IP network through the mobile communication network.

The switching centers 300 'and 300' 'include a packet data service node (hereinafter referred to as' PDSN') of a CDMA network. In addition, it includes a serving GPRS Service Node (hereinafter referred to as 'SGSN') and a Gateway GPRS Support Node (hereinafter referred to as 'GGSN') of the WCDMA network. In addition, the WiBro network includes an access control router (hereinafter referred to as an ACR).

AAA (Authentication Authorization Accounting) 400 performs subscriber management tasks such as subscriber access rights and authentication for the terminal 100.

The HA proxy server 500 performs dynamic HA assignment based on the state information of each of the HAs 601 and 603. Here, the state information indicates the load state of each of the HAs 601 and 603 as binding information between the home address of the terminal 100 and the mobile address of the terminal. That is, it can be said that it represents a state regarding how many mobile stations (601, 603) performs the mobile IP registration process for the terminal (100).

The plurality of HAs 600 includes one or more HAs 601 and 603, and are a type of routers that register binding information between a home IP address of the terminal 100 and an IP address after moving. The plurality of HAs 600 receives the mobile IP registration request message from the terminal 100 whenever the subnet in which the terminal 100 is located is changed and continuously updates and manages binding information.

At this time, the plurality of HA 600 reports its status information to the HA proxy server 500 at a predetermined cycle.

As described above, since the HA proxy server 500 is implemented on a node to manage state information of the plurality of HAs 600 in real time, it is possible to efficiently implement practical HA allocation and deployment when dynamic HA is allocated to the terminal 100. . Of course, there was a conventional HA assignment method for requesting mobile IP registration to HA recommended by AAA 400, but in this case, PDSN is assigned, not UE, and UE directly accesses HA to register mobile IP. In the request method, a dynamic HA allocation method has not been proposed. In addition, the AAA 400 is a concept of a database that manages the information of the HA, and performs the function of distributing the load by receiving status information reports of the plurality of HAs 600 in real time, such as the HA proxy server 500 of the present invention. I could not.

Then, the configuration of implementing a dynamic home agent allocation method through the HA proxy server 500 will be described in more detail.

2 is a block diagram of a terminal providing a mobile IP using dynamic home agent allocation according to an embodiment of the present invention, which is a block diagram showing the detailed configuration of the terminal 100 of FIG.

According to FIG. 2, the terminal 100 includes a memory 120 and a mobile IP processor 140.

The memory 120 stores the IP address of the HA proxy server 500.

The mobile IP processor 140 performs the mobile IP registration process by using the IP addresses of the HAs 601 and 603 dynamically allocated from the HA proxy server 500 accessed through the IP address stored in the memory 120.

The mobile IP processor 140 includes an agent advertisement execution module 142 and a mobile IP registration execution module 144.

The agent advertisement execution module 142 transmits an agent advertisement request message to the HA proxy server 500 using the IP address of the HA proxy server 500 stored in the memory 120. The HA proxy server 500 receives an agent advertisement message in which the IP addresses of the HAs 601 and 603 dynamically allocated are included in the home address field.

The mobile IP registration execution module 144 requests mobile IP registration to the HAs 601 and 603 obtained through the agent advertisement execution module 142 and receives a mobile IP registration response.

FIG. 3 is a block diagram illustrating an HA proxy server for providing mobile IP using dynamic home agent allocation according to an embodiment of the present invention, and shows a detailed configuration of the HA proxy server 500 of FIG. 1.

According to FIG. 3, the HA proxy server 500 includes an HA database 520, an HA information manager 540, and a mobile IP processor 560.

The HA database 520 stores state information of each of the HAs 601 and 603.

The HA information manager 540 stores and manages state information of each of the HAs 601 and 603 in the HA database 520, and includes a receiving module 542 and a state management module 544.

The receiving module 542 receives state information from each of the HAs 601 and 603 according to a preset period.

The state management module 544 stores state information received through the receiving module 542 in the HA database 520.

The mobile IP processing unit 560 provides the HA 100 and 603 allocation information to the terminal 100, and the mobile IP processing unit 560 includes an HA allocation module 562 and a message processing module 564.

The HA assignment module 562 selects a specific HA based on state information stored in the HA database 520. At this time, the HA selection selects the HA having the least load of the HA through the state information, that is, the least amount of mobile IP registration processing.

The message processing module 564 receives an agent advertisement request message from the terminal 100. The HA assignment module 562 transmits an agent advertisement message in which the selected HA assignment information is inserted into the home address field to the terminal 100.

FIG. 4 is a block diagram illustrating an HA for providing mobile IP using dynamic home agent allocation according to an embodiment of the present invention, and shows a detailed configuration of each of the plurality of HAs 601 and 603 of FIG. 1.

According to FIG. 4, each of the plurality of HAs 600 includes a binding list DB 620, a status reporter 640, and a mobile IP processor 660.

The binding list DB 620 stores the home IP address of the terminal 100 which is updated whenever the subnet in which the terminal 100 is located is changed and the binding information of the IP address after the movement.

The status report unit 640 periodically transmits status information indicating how much the HA including the binding information stored in the binding list DB 620 is loaded to the HA proxy server 500.

When the mobile IP processing unit 660 receives the mobile IP registration request message from the terminal 100, the mobile IP processor 660 performs subscriber authentication of the terminal 100 to the AAA 400. When the subscriber authentication process is completed, the mobile IP processing unit 660 updates binding information in the binding list DB 620 and transmits a mobile IP registration response message to the terminal 100.

Now, a mobile IP providing method using dynamic home agent allocation in the mobile IP providing system described with reference to FIGS. 1 to 4 will be described.

5 is a flowchart illustrating a mobile IP providing process using dynamic home agent allocation in a CDMA network according to an embodiment of the present invention, and FIG. 6 is a mobile IP providing using dynamic home agent allocation in a WCDMA network according to an embodiment of the present invention. 7 is a flowchart illustrating a process of providing a mobile IP using dynamic home agent allocation in a WiBro network according to an embodiment of the present invention.

First, according to FIG. 5, in a CDMA network, a terminal (100 of FIG. 1) performs a wireless network access procedure (S101) with a BTS / BSC / PCG. The BTS / BSC / PCG performs a process of accessing a PDSN and a Remote Node-PDSN (R-P) interface (S103). The terminal 100 enters into a link control protocol (hereinafter referred to as 'LCP') agreement with the PDSN and a subscriber authentication and an internet protocol control protocol (hereinafter referred to as 'IPCP') agreement of the terminal. A PPP access procedure (S105) is performed.

6, in the WCDMA network, the terminal 100 performs a wireless network access process (S201) with a Node B / RNC / SGSN. The terminal 100 requests a PDP context activation (Activate Packet Data Protocol context) to the Node B / RNC / SGSN (S203). The Node B / RNC / SGSN performs a Create Packet Data Protocol context (GGSN) and a PDP context, and then transmits a PDP context activation response to the terminal 100.

In addition, according to FIG. 7, in the WiBro network, the terminal 100 performs a RAS and a wireless network access processing and authentication procedure (S301). The terminal 100 performs an ACR and an IP address allocation and QoS process (S303).

After the wireless network access procedure of the terminal 100 through the above steps, the terminal 100 performs a mobile IP registration procedure according to the change of the subnet.

At this time, each of the plurality of HAs (601 and 603 of FIG. 1) periodically reports HA state information, that is, binding information, to the HA proxy server 500 (S107, S109, S211, S213, S305, and S307).

The terminal 100 transmits an agent solicitation message to the HA proxy server 500 (S111, S215, and S309).

The HA proxy server 500 selects a specific HA (HA 1) 601 in consideration of the state information (binding state) of the HA obtained through the steps S107, S109, S211, S213, S305, and S307 (S113). , S217, S311).

The HA proxy server 500 transmits an Agent Advertisement message including the specific HA (HA 1) 601 allocation information selected in steps S113, S217, and S311 to the terminal 100 (S115, S219). , S313).

The terminal 100 requests mobile IP registration to a specific HA (HA 1) 601 obtained through steps S115, S219, and S313 (S117, S221, and S315).

The specific HA (HA 1) 601 transmits an access request to the AAA 400 (S119, S223, S317) and receives an access response (S121, S225, S319) to perform subscriber authentication of the terminal 100.

The specific HA (HA 1) 601 transmits a mobile IP registration response to the terminal 100 (S123, S227, S321).

Thereafter, the updated state information of the specific HA (HA 1) 601 updated for the mobile IP registration procedure performed to the terminal 100 is reported to the HA proxy server 500 (S125, 127, S229, S2231, S323, S325).

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 flowchart illustrating a dynamic home agent reference method using CoA in a conventional CDMA network.

2 is a flowchart illustrating a mobile IP access method using CCOA in a conventional CDMA network.

3 is a block diagram of a system for providing a mobile IP using dynamic home agent allocation according to an embodiment of the present invention.

4 is a block diagram of a terminal providing a mobile IP using dynamic home agent allocation according to an embodiment of the present invention.

5 is a block diagram of a proxy home agent server providing a mobile IP using dynamic home agent allocation according to an embodiment of the present invention.

6 is a block diagram of a home agent providing a mobile IP using dynamic home agent allocation according to an embodiment of the present invention.

7 is a flowchart illustrating a process of providing mobile IP using dynamic home agent allocation in another CDMA network according to an embodiment of the present invention.

8 is a flowchart illustrating a mobile IP providing process using dynamic home agent allocation in a WCDMA network according to an embodiment of the present invention.

9 is a flowchart illustrating a mobile IP providing process using dynamic home agent allocation in a WiBro network according to an embodiment of the present invention.

Claims (12)

In the mobile Internet protocol providing system using dynamic home agent assignment, A home agent proxy server managing state information of each of a plurality of home agents, receiving a home agent request for mobile internet protocol registration from a terminal, and providing home terminal information allocated to the terminal based on the state information; And A plurality of mobile station to transmit the state information according to the mobile Internet protocol registration process for the terminal to the home agent proxy server, and performs the mobile Internet protocol registration process requested by the terminal using the home agent information provided from the home agent proxy server. Home agent Mobile Internet protocol providing system comprising a. The method of claim 1, The home agent proxy server, A home agent database for storing state information of each of the home agents, wherein the state information includes binding information of a home address of the terminal and a mobile address of the terminal indicating a load state of the home agent; A home agent information manager configured to manage the state information stored in the home agent database; And A mobile internet protocol processing unit which transmits address information of the selected home agent to the terminal using the state information stored in the home agent database. Mobile Internet protocol providing system comprising a. The method of claim 2, The home agent information management unit, A receiving module which receives the status information from each of the home agents at predetermined intervals; And A state management module for storing and updating the state information periodically received through the receiving module in the home agent database Mobile Internet protocol providing system comprising a. The method of claim 2, The mobile Internet protocol processing unit, A home agent assignment module for selecting a home agent having a least load based on the state information stored in the home agent database; And A message processing module that receives an agent advertisement request message from the terminal and transmits an agent advertisement message including a home agent address field into which the home agent address information selected by the home agent assignment module is inserted. Mobile Internet protocol providing system comprising a. The method according to any one of claims 1 to 4, The home agent, A status reporter for transmitting the status information according to the mobile internet protocol registration process performed with the terminal to the home agent proxy server at predetermined intervals; And A mobile Internet that performs the mobile internet protocol registration of the terminal according to the mobile internet protocol registration request received from the terminal by using the home agent address information selected based on the state information and transmits a mobile internet protocol registration response to the terminal. Protocol processing section Mobile Internet protocol providing system comprising a. A terminal providing a mobile internet protocol using dynamic home agent assignment, A memory for storing an internet protocol address of a home agent proxy server managing state information of each of the plurality of home agents; And A mobile internet protocol processing unit for requesting mobile internet protocol registration using address information of a home agent obtained from the home agent proxy server connected using the internet protocol address stored in the memory. Terminal comprising a. The method of claim 6, The mobile Internet protocol processing unit, Transmits an agent advertisement request message to the home agent proxy server, and the status information, wherein the status information includes binding information of the home address of the terminal indicating the load status of each of the home agents and the mobile address of the terminal; An agent advertisement execution module configured to receive an agent advertisement message including address information of the selected home agent; And A mobile internet protocol registration execution module for receiving a response by requesting mobile internet protocol registration by using the address information of the home agent included in the agent advertisement message received by the agent advertisement execution module. Terminal comprising a. In the method for the terminal to provide a mobile Internet protocol using the dynamic home agent assignment, Requesting, by the terminal, home agent information for mobile internet protocol registration to a home agent proxy server managing state information of each of a plurality of home agents; Receiving selected home agent address information based on state information of each of the home agents from the home agent proxy server; And Requesting registration of a mobile internet protocol using the received home agent address information Mobile internet protocol providing method comprising a. The method of claim 8, The requesting step, The mobile internet protocol providing method of transmitting an agent advertisement request message to the home agent proxy server using preset address information of the home agent proxy server. The method of claim 9, The receiving step, A home selected from the home agent proxy server based on state information of each of the home agents, wherein the state information includes binding information of the home address of the terminal and the mobile address of the terminal indicating the load state of each of the home agents; A method of providing a mobile internet protocol for receiving agent advertisement messages containing agent address information. The method of claim 10, The requesting registration of the mobile internet protocol may include: Extracting address information of the selected home agent based on the state information inserted into a home agent address field of the agent advertisement message; And Receiving a response message by transmitting a mobile internet protocol registration request message by using the extracted address information of the home agent Mobile internet protocol providing method comprising a. The method according to any one of claims 8 to 11, Status information of each of the home agents, And each of the plurality of home agents transmits the state information according to the mobile internet protocol registration process performed with the terminal to the home agent proxy server according to a predetermined period.

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