KR100926829B1 - System for providing IP address to terminal in mobile communication network and method thereof - Google Patents

Abstract

The present invention relates to a system and method for providing an internet protocol address to a terminal connected to a mobile communication network.

According to the present invention, the packet data service node receives the Internet protocol service subscription information of the terminal from the particle information management server. The internet protocol address of the terminal is allocated according to the received internet protocol service subscription information of the terminal. The terminal then provides the allocated internet protocol address. Here, the internet protocol service subscription information of the terminal includes service subscription information of any one of a simple internet protocol service, a proxy mobile internet protocol service, and a mobile internet protocol service.

Accordingly, the mobile communication network can accommodate both the simple Internet protocol service, the proxy mobile Internet protocol service, and the mobile Internet protocol service according to whether the terminal supports the mobility according to the subscription information of the terminal, and provide these services separately. .

IP Address, Simple IP, Proxy Mobile IP, Mobile IP, CDMA, IPv4

Description

System for providing IP address to terminal connected to mobile communication network and method thereof

The present invention relates to a system and method for providing an Internet Protocol (hereinafter referred to as "IP") address to a terminal connected to a mobile communication network. More specifically, Code Division Multiple Access (hereinafter referred to as 'CDMA') using Internet Protocol Version 4 (hereinafter referred to as 'IPv4') is a system for providing an IP address to a terminal in a mobile communication network. And to 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 wireless data service, etc. has been in the spotlight.

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

However, in order to provide mobile IP, a mobile IP stack (hereinafter, referred to as a 'mobile IP stack') has a burden on a terminal.

In fact, CPU power is still hard to put a mobile IP stack into the handset. And in the air section, the packet should be at least small, the big packet is a tunnel. In addition, since all terminals are equipped with a mobile IP stack, it is expensive, so network operators simply change the network side to provide mobility.

Therefore, recently, a discussion about Proxy Mobile IP (hereinafter, referred to as a 'proxy mobile IP') method for accommodating mobility in a network without implementing a separate stack in a terminal is actively underway.

Recently, the proxy mobile IP is a draft of the Internet Engineering Task Force (IETF), and standardization is in progress in most parts related to Internet protocol version 6 (IPv6).

However, standardization is only in progress toward solving IPv4 through translation, and there is no discussion on separate standardization. In addition, proxy mobile IPs are mostly being standardized in wireless LANs or Wibros, but are not even mentioned by organizations such as 3GPP2 that manage CDMA standards.

Meanwhile, in the conventional CDMA network, Internet protocol services are not classified and provided according to whether a terminal provides mobility. That is, when allocating an Internet protocol address, the terminal may or may not provide mobility to the terminal through a different procedure according to the presence or absence of the mobile IP stack.

Therefore, the technical problem to be achieved by the present invention is to set the Internet protocol address according to the service processing of any one of the simple Internet protocol service, proxy Internet protocol service and mobile Internet protocol service according to the Internet protocol service subscription information of the terminal connected to the mobile communication network. It is to provide a system and a method for providing the same.

In order to achieve the above-described problem, the Internet protocol address providing system according to a feature of the present invention,
In a system for providing an internet protocol address to a terminal, the internet protocol service subscription information of the terminal, wherein the subscription information includes service subscription information of any one of a simple internet protocol service, a proxy mobile internet protocol service, and a mobile internet protocol service. A subscriber information management server for managing; A packet data service node providing the terminal with an internet protocol address of the terminal allocated according to the internet protocol service subscription information of the terminal received from the subscriber information management server; And a home agent for allocating a mobile internet protocol address to the terminal when the terminal is subscribed to a proxy mobile internet protocol service or a mobile internet protocol service.
The subscriber information management server includes: a subscriber database storing internet protocol service subscription information of the terminal; And when the access request for subscriber authentication of the terminal is received from the packet data service node, extracts the Internet protocol service subscription information of the terminal from the subscriber database and includes it in the response to the access request to the packet data service node. Includes subscriber authentication to transmit to.

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An IP address providing method according to a feature of the present invention,
A method of providing an internet protocol address by an internet protocol address providing system including a packet data service node, a subscriber information management server, and a home agent, the method comprising: a packet data service node having a link established for a terminal and an internet service; Transmitting an access request for subscriber authentication to the subscriber information management server; An access response including the Internet protocol service subscription information of the terminal from the subscriber information management server, wherein the subscription information includes service subscription information of any one of a simple internet protocol service, a proxy mobile internet protocol service, and a mobile internet protocol service; Receiving; Allocating an internet protocol address of the terminal according to the internet protocol service subscription information of the terminal included in the access response; And providing the terminal with the assigned Internet protocol address.

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According to the present invention, since a simple internet protocol service, a proxy internet protocol service, and a mobile internet protocol service are separately provided in a mobile communication network, a proxy mobile internet protocol service can be provided in a CDMA network using an internet protocol version 4. It can also accept subscribers of existing simple Internet protocol services.

In addition, even in a CDMA network, even if the mobility technology is not installed in the terminal, mobility can be efficiently supported in the network.

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

Throughout the specification, when a part is said to "include" a certain component, it means that it can further include other components, without excluding other components unless specifically stated otherwise. In addition, the terms “… unit”, “… module”, etc. 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 system and method for providing an internet protocol address to a terminal connected to a mobile communication network according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Hereinafter, the mobile communication network is implemented in a CDMA network using Internet Protocol Version 4 (IPv4).

1 is a configuration diagram of a system for providing an internet protocol address according to an embodiment of the present invention, and shows a configuration of a system for providing mobility of a terminal.

According to FIG. 1, the Internet protocol providing system includes a terminal 100, a base station apparatus 200 ′, 200 ″, a packet data service node (hereinafter referred to as a “PDSN”) 300 ′, 300 ′. '), A subscriber information management server (hereinafter referred to as "AAA") 400 and a home agent (hereinafter referred to as "HA") 500.

The terminal 100 is a mobile terminal that a subscriber who receives various kinds of services such as voice, data, and video through a mobile communication network can carry and communicate while transmitting and receiving data packets desired by the subscriber through an IP network. The terminal 100 may be a mobile node moving from the first subnet to the second subnet, and may be a mobile terminal equipped with an IPv4 protocol.

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 ″ includes a base transceiver station (BTS), a base station controller (BSC), and a packet control function (PCF). The base station transceiver is in charge of wireless transmission with the terminal 100, the base station controller is in charge of connection with various wired networks and control of the base station transceiver, and the packet controller is in charge of control of packet data transmission / reception of the terminal 100.

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

PDSN (300 ', 300' ') is set up the RP session (Remote Node-PDSN Session) with the base station apparatus 200', 200 '', the terminal 100 and the Link Comtrol Protocol (hereinafter referred to as 'LCP') IP address used by the terminal 100 is assigned by performing the agreement, subscriber authentication of the terminal and the Internet Protocol Control Protocol (hereinafter referred to as 'IPCP') agreement.

At this time, PDSN (300 ', 300 ″) according to the subscription information of the terminal 100 (Simple Internet Protocol, hereinafter referred to as' SIP') service, Proxy Mobile Internet Protocol (hereinafter referred to as "Proxy Mobile Internet Protocol") It assigns an IP address according to the processing of any one of a service (described as 'PMIP') and a mobile internet protocol (hereinafter referred to as 'MIP').

The AAA 400 performs subscriber management tasks such as subscriber access rights and authentication for the terminal 100. The AAA 400 manages IP service subscription information of a terminal corresponding to any one of a SIP service, a PMIP service, and a MIP service. At this time, the subscription information is provided when performing subscriber authentication with PDSNs 300 'and 300 ".

The HA 500 registers mobility management and home address of the terminal 100. The HA 500 is composed of mapping information of a home address of the terminal 100 and a care-of address (hereinafter, referred to as' CoA ') of the PDSNs 300' and 300 '' to which the terminal 100 is connected. Manage binding lists.

When the subscription information of the terminal 100 provides mobility, that is, the HA 500 provides the PDSN 300 ', 300' 'with the home address of the terminal 100 according to the PMIP service or the MIP service processing.

FIG. 2 is a block diagram showing a detailed configuration of a packet data service node according to an embodiment of the present invention, and shows a detailed configuration of the PDSNs 300 'and 300' 'of FIG.

According to FIG. 2, PDSNs 300 ′ and 300 ″ include an authentication processor 320, a mobility processor 340, and a packet call processor 360.

The authentication processor 320 performs subscriber authentication of the terminal 100 in which the LCP for the Internet service is established. The authentication processor 320 transmits an access request to the AAA 400 to receive an access response including IP service subscription information of the terminal 100.

The mobility processor 340 allocates an IP address to the terminal 100 according to the IP service subscription information of the terminal 100. The mobility processor 340 performs one of SIP address processing, PMIP address processing, and MIP address processing for the terminal 100.

The mobility processor 340 allocates an IP address through an IPCP agreement when the terminal 100 is a SIP service subscriber or a PMIP service subscriber. That is, the IPCP generation request is received from the terminal 100 and an IPCP generation response including the assigned IP address is transmitted to the terminal. The mobility processor 340 allocates an IP address through a MIP registration process after the IPCP agreement when the terminal 100 is a MIP service subscriber.

When the terminal 100 is a PMIP service subscriber or a MIP service subscriber, the packet call processing unit 360 uses the IP address assigned by the mobility processing unit 340 to transmit and receive packet data transmitted through a tunnel connected with the HA 500. Give 100.

3 is a block diagram illustrating a detailed configuration of the mobility processor of FIG. 2.

According to FIG. 3, the mobility processor 340 includes a determination module 342 and an IP processing module 344, 346, and 348.

The decision module 342 includes a request decision module 342a and a subscription decision module 342b.

The request determination module 342a determines whether the IP option field is included in the IPCP generation request message received from the terminal 100 and whether the static IP address is included.

The subscription determination module 342b determines whether the terminal 100 is a SIP service subscriber, a PMIP service subscriber, or a MIP service subscriber based on the IP service subscription information of the terminal 100 confirmed through the authentication processor 320.

The IP processing modules 344, 346, and 348 perform IP address allocation of the terminal 100 according to the determination result of the determination module 342.

The IP processing module 344, 346, 348 includes a simple IP processing module 344, a proxy mobile IP processing module 346, and a mobile IP processing module 348.

The simple IP processing module 344 includes an IP option field whose address is initialized, and the subscription determination module 342b performs SIP processing when the terminal is a SIP service subscriber.

The proxy mobile IP processing module 346 performs PMIP processing when an address is initialized in the IP option field or a static IP address is assigned and the subscription determination module 342b determines that the terminal is a PMIP service subscriber.

The mobile IP processing module 348 performs MIP processing when an IPCP generation request message including an IP option field whose address is initialized or when an IPCP generation request message is not included or a static IP address is included and a MIP service subscriber is received. To perform.

4 is a block diagram showing a detailed configuration of a subscriber information management server according to an embodiment of the present invention, a detailed block diagram of the AAA (400) of FIG.

According to FIG. 4, AAA 400 includes a subscriber database 420 and a subscriber authenticator 440.

The subscriber database 420 stores IP service subscription information on whether or not the terminal 100 supports mobility. That is, the terminal 100 stores IP service subscription information regarding whether the terminal 100 is subscribed only to the SIP service, the PMIP service, or the MIP service.

The subscriber authentication unit 440 performs access processing for subscriber authentication between the PDSNs 300 'and 300' 'and the terminal 100. The subscriber authentication unit 440 extracts IP service subscription information of the terminal 100 from the subscriber database 420 according to the access request received from the PDSNs 300 'and 300' '. The access response including the extracted IP service subscription information is transmitted to the PDSNs 300 'and 300' '.

5 is a block diagram showing a detailed configuration of a home agent according to an embodiment of the present invention, which is a detailed block diagram of the HA 500 of FIG.

According to FIG. 5, the HA 500 includes an address management information DB 520, an address manager 540, and a mobility manager 560.

The address management information DB 520 stores a binding list including a home address of the terminal 100 and CoA mapping information of the PDSNs 300 ′ and 300 ″ connected to the terminal 100.

The address manager 540 manages the address management information DB 520. The address manager 540 receives a mobile IP registration request from the PDSNs 300 'and 300' 'and allocates a home address to the terminal 100. The allocated home address is mapped and stored in the address management information DB 520 with CoAs of PDSNs 300 'and 300 ". The mobile IP registration response including the assigned home address is transmitted to the PDSNs 300 'and 300 ".

The mobility manager 560 checks whether the CoA of the PDSN 300 ″ included in the mobile IP registration request received by the address manager 540 is different from the CoA of the PDSN 300 ′ stored in the address management information DB 520. do. In another case, the call release message of the terminal 100 is transmitted to the corresponding PDSN 300 ′ of the stored auxiliary address stored in the address management information DB 520, and a response message is received.

Now, a method of allocating an IP address to the terminal 100 through the configuration of the mobile communication system described with reference to FIGS. 1 to 5 will be described.

FIG. 6 is a flowchart illustrating a method for providing an internet protocol address according to an embodiment of the present invention, and showing a process of IP address allocation of a PDSN (300 ', 300' 'of FIG. 1).

According to FIG. 6, after checking subscriber information of the terminal (S101), an IPCP generation request is received from the terminal (S103).

Check the IP option field of the IPCP generation request received in step S103 (S105) to determine whether the IP option field is set to initialization information (0.0.0.0), whether the IP option field is not included, or the IP option field contains a static IP address. It is determined whether or not (S107).

As a result of the determination in step S107, when the IP option field is set to the initialization information (0.0.0.0), it is determined whether the terminal is a SIP service subscription, a PMIP service subscription, or a MIP service subscription based on the subscriber information of the terminal checked in step S101. It is determined (S109).

As a result of the determination in step S109, when the terminal is a SIP service subscriber, the terminal assigns a SIP address (S111).

As a result of the determination in step S109, when the terminal is a PMIP service subscriber, the terminal assigns a PMIP address (S113).

As a result of the determination in step S109, when the terminal is a MIP service subscriber, it allocates a MIP address to the terminal (S115).

On the other hand, if the IP option field is not included as a result of the determination in step S107, mobile IP address registration processing is performed (S117).

In addition, if the static IP address is included in the IP option field as a result of the determination in step S107, it is determined whether the terminal is a PMIP service subscription or a MIP service based on the subscriber information of the terminal checked in step S101 (S119).

As a result of the determination of step S119, if the subscriber is a PMIP service, a process of assigning a PMIP address to the terminal is performed (S121).

As a result of the determination of step S119, if the subscriber is a MIP service, a process of allocating a MIP address to the terminal is performed (S123).

7 and 8 will be described in detail the process of providing the IP address for each embodiment according to the presence or absence of the IP option field and the home address in the IPCP generation request received from the terminal 100 by the PDSN (300 ', 300' ') do.

7 is a flowchart illustrating a series of processes for providing an internet protocol address according to the first embodiment of the present invention. That is, a flowchart when the IPCP message including the IP option field is received.

According to FIG. 7, the terminal (100 of FIG. 1) performs a traffic channel (TCH) setup with a base station apparatus (200 ′, 200 ″ of FIG. 1) (S201).

The base station apparatus 200 ′, 200 ″ performs an R-P session setup with the PDSN 300 ′, 300 ″ (S203).

The terminal 100 performs LCP agreement (S205) and subscriber authentication (S207) with PDSN (300 ', 300' ').

PDSN (300 ', 300 ″) transmits the access request message to the AAA (400 in Fig. 1) in the subscriber authentication step (S207) (S209).

The AAA 400 checks the subscriber information of the terminal 100 (S211) and transmits an access response message including the subscriber information (S213).

PDSN (300 ', 300' ') receives a message requesting the generation of IPCP IP options are initialized (0.0.0.0) from the terminal 100 (S215).

The PDSN 300 ′, 300 ″ determines whether the terminal 100 subscriber is a subscriber providing mobility (S217).

If it is determined in step S217 that the terminal 100 is not the subscriber providing the mobility, and transmits an IPCP generation response message to the terminal 100 (S219).

PDSN (300 ', 300' ') performs a simple IP process to assign a SIP address to the terminal 100 (S221). The IPCP generation request message including the SIP address allocated in step S221 is transmitted to the terminal 100 (S223) to receive a response (S225).

The terminal 100 transmits an IPCP generation request message including a SIP address received in step S223 to the PDSNs 300 'and 300' '(S227) and receives a response (S229).

Thereafter, the terminal 100 transmits and receives packet data to and from the IP network using a SIP address assigned by simple IP processing of the PDSNs 300 'and 300' '.

Meanwhile, if it is determined in step S217 that the terminal 100 subscriber is a subscriber providing mobility, it is determined whether the terminal 100 subscriber is a proxy mobile IP service subscriber or a mobile IP service subscriber (S231).

As a result of the determination in step S231, if the subscriber is a proxy mobile IP service subscriber, the PDSNs 300 'and 300 " transmit a mobile IP registration request message to HA (500 in FIG. 1) (S233). At this time, the mobile IP registration request message includes a reverse tunneling option and a CoA address of PDSNs 300 'and 300 ".

PDSN (300 ', 300' ') once transmits the IPCP generation response message to the terminal 100 (S235).

The PDSNs 300 ′ and 300 ″ receive a mobile IP response message including the home address assigned by the HA 500 from the HA 500 (S237).

The PDSNs 300 ′ and 300 ″ transmit an IPCP generation request message including a home address obtained through step S237 to the terminal 100 (S239) and receive a response (S241).

The terminal 100 transmits an IPCP generation request message including a home address received in step S239 to the PDSNs 300 'and 300 " (S243) and receives a response (S245).

Thereafter, the terminal 100 uses the home address received in step S239 as its IP address through the HA 500 and the PDSN 300 ', 300' 'with IP in IP tunneling (reverse tunneling) set. Send and receive data.

In this case, as a result of the determination in step S231, when the subscriber is a mobile IP service subscriber, the IPCP agreement process (S247, S249, S251, S253, S255) does not perform the IP address allocation of the terminal 100.

After completion of the IPCP agreement, the target PDSN 300 ″ transmits an agent advertisement according to an agent solicitation request (S257) of the terminal 100 (S259).

The target PDSN 300 ″ receives the mobile IP registration request from the terminal 100 (S261) and requests the HA 500 to register the mobile IP (S263).

The target PDSN 300 ″ transmits a mobile IP registration response including the home address obtained through the mobile IP registration response received from the HA 500 (S265) to the terminal 100 (S267).

Thereafter, the terminal 100 transmits and receives packet data to and from the IP network by setting the mobile IP address allocated in step S341 as its IP address.

8 is a flowchart illustrating a series of processes for providing an internet protocol address according to a second embodiment of the present invention. That is, a flowchart is a case where an IPCP message including no IP option field or a home address is received.

According to FIG. 8, steps S301, S303, S305, S307, S309, S311 and S313 have already been described with reference to FIG. 7, and thus description thereof will be omitted.

If the target PDSN (300 '') receives the IPCP generation request from the terminal 100 (S315)

It is determined whether the IP option field is not included or a static address is set (S317).

The target PDSN 300 ″ determines whether the terminal 100 subscriber is a PMIP service subscriber when the static address is set (S319).

As a result of the determination in steps S317 and S319, when the IP option generation message received in step S315 does not include the IP option field, the IPCP agreement process (S321, S323, S325, S327, and S329) allocates the IP address of the terminal 100. Do not do it.

In addition, when a static address is set in the IPCP generation request message received in step S315, the set static address is accepted as it is in the IPCP agreement process (S321, S323, S325, S327, S329).

After completion of the IPCP agreement, the target PDSN 300 ″ transmits an agent advertisement according to an agent advertisement request (S331) of the terminal 100 (S333).

The target PDSN 300 ″ receives the mobile IP registration request from the terminal 100 (S335) and requests the HA 500 to register the mobile IP (S337).

The target PDSN 300 ″ transmits a mobile IP registration response including the home address obtained through the mobile IP registration response received from the HA 500 (S339) to the terminal 100 (S341).

Thereafter, the terminal 100 transmits and receives packet data to and from the IP network by setting the mobile IP address allocated in step S341 as its IP address.

On the other hand, when the static address is set in the IPCP generation request message received in step S315 and the terminal 100 subscriber is a PMIP service subscriber in step S317 and step S319, the serving 100 PDSN when the terminal 100 is handover (Hanover) It is determined that the home address allocated from 300 'is included in the IPCP generation request message.

The target PDSN 300 ″ transmits a mobile IP registration request message in which the reverse tunneling option field is set to the HA 500 (S343). At this time, the mobile IP registration request message includes a home address allocated from the serving PDSN 300 'and an auxiliary address of the target PDSN 300' '.

The target PDSN 300 ″ once transmits an IPCP generation response to the terminal 100 to the IPCP generation request message received in step S315 (S345).

The HA 500 updates the binding list with the auxiliary address received in step S343 when the auxiliary address mapped with the home address received in step S343 does not match the auxiliary address of the target PDSN 300 '' received in step S343. (S347). The mobile IP registration response message including the home address is transmitted to the target PDSN 300 ″ (S349).

The target PDSN 300 ″ transmits an IPCP generation request message including the home address received in step S349 to the terminal 100 (S351) and receives a response (S353).

The HA 500 receives the response by requesting the call release of the terminal 100 to the serving PDSN 300 'using the existing auxiliary address mapped to the home address received in step S343 (S355) (S357). The serving PDSN 300 ′ confirms that the terminal 100 has left the subnet to which it belongs and returns resources.

The terminal 100 transmits an IPCP generation request message including the home address received in step S351 to the target PDSN 300 ″ (S359) and receives a response (S361).

As a result, the IPCP agreement is completed between the terminal 100 and the target PDSN 300 ″. The terminal 100 transmits and receives data to and from the IP network through the HA PD 500 and the target PDSN 300 ″ in which tunneling is set using the home address as its IP address.

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 block diagram of a mobile communication system for providing an Internet protocol address according to an embodiment of the present invention.

2 is a block diagram showing a detailed configuration of a packet data service node according to an embodiment of the present invention.

3 is a block diagram illustrating a detailed configuration of the mobility processor of FIG. 2.

4 is a block diagram showing a detailed configuration of a subscriber information management server according to an embodiment of the present invention.

5 is a block diagram showing a detailed configuration of a home agent according to an embodiment of the present invention.

6 is a flowchart of a method for providing an Internet protocol address according to an embodiment of the present invention.

7 is a flowchart illustrating a series of processes for providing an internet protocol address according to the first embodiment of the present invention.

8 is a flowchart illustrating a series of processes for providing an internet protocol address according to a second embodiment of the present invention.

Claims (15)

delete In the system for providing the Internet Protocol address to the terminal, A subscriber information management server for managing the Internet protocol service subscription information of the terminal, wherein the subscription information includes service subscription information of any one of a simple Internet protocol service, a proxy mobile Internet protocol service and a mobile Internet protocol service; A packet data service node providing the terminal with an internet protocol address of the terminal allocated according to the internet protocol service subscription information of the terminal received from the subscriber information management server; And A home agent for allocating a mobile internet protocol address to the terminal when the terminal is subscribed to a proxy mobile internet protocol service or a mobile internet protocol service; The subscriber information management server, A subscriber database storing internet protocol service subscription information of the terminal; And When the access request for subscriber authentication of the terminal is received from the packet data service node, the Internet protocol service subscription information of the terminal is extracted from the subscriber database and included in the response to the access request to the packet data service node. Transmitting Subscriber Certificate Internet protocol address providing system comprising a. The method of claim 2, The packet data service node, An authentication processor configured to receive an access response including Internet protocol service subscription information of the terminal by transmitting an access request for subscriber authentication of the terminal where a link for internet service is established; And The terminal receives any one of a simple internet protocol address, a proxy internet protocol address, and a mobile internet protocol address based on the internet protocol service subscription information of the terminal obtained through the access response and the internet protocol control protocol generation request received from the terminal. Mobility processor to allocate Internet protocol address providing system comprising a. The method of claim 3, The mobility processing unit, A request determination module for determining Internet protocol option field information in response to the Internet protocol control protocol generation request; A subscription determination module that determines an internet protocol service subscribed to by the terminal based on the internet protocol service subscription information of the terminal; And An internet protocol processing module for performing any one of simple internet protocol processing, proxy internet protocol processing, and mobile internet protocol processing to the terminal according to a determination result of the request determination module and the subscription determination module; Internet protocol address providing system comprising a. The method of claim 4, wherein The internet protocol processing module, A simple internet protocol processing module configured to perform simple internet protocol processing on the terminal when the internet protocol control protocol generation request includes address initialization information and the terminal is a simple internet protocol service subscriber; A proxy internet protocol processing module for performing proxy mobile internet protocol processing to the terminal when the internet protocol control protocol generation request includes address initialization information or static internet protocol address information and the terminal is a proxy internet protocol service subscriber; ; And When the internet protocol control protocol generation request includes address initialization information and the terminal is a mobile internet protocol service subscriber or when the internet protocol control protocol generation request does not include the internet protocol option field, the mobile internet is transmitted to the terminal. Mobile Internet Protocol Processing Module Performing Protocol Processing Internet protocol address providing system comprising a. The method of claim 5, The proxy internet protocol processing module, An internet protocol for receiving a mobile internet protocol registration response including the home address by sending a mobile internet protocol registration request including a home address and an auxiliary address of the packet data service node to the home agent; Address-providing system. The method of claim 6, The home agent, An address manager for managing mapping information of the home address and the auxiliary address of the packet data service node; And If the auxiliary address of the packet data service node included in the mobile internet protocol registration request is different from the auxiliary address mapped to the address management unit, request the call release of the terminal to the corresponding packet data service node of the mapped auxiliary address. Responsive Mobility Management Department Internet protocol address providing system comprising a. delete A method of providing an internet protocol address by an internet protocol address providing system including a packet data service node, a subscriber information management server, and a home agent, the method comprising: Sending, by the packet data service node, a link established for a terminal and an internet service, to the subscriber information management server for an access request for subscriber authentication of the terminal; An access response including the Internet protocol service subscription information of the terminal from the subscriber information management server, wherein the subscription information includes service subscription information of any one of a simple internet protocol service, a proxy mobile internet protocol service, and a mobile internet protocol service; Receiving; Allocating an internet protocol address of the terminal according to the internet protocol service subscription information of the terminal included in the access response; And Providing the terminal with the allocated internet protocol address Internet protocol address providing method comprising a. The method of claim 9, The allocating step, Receiving an internet protocol control protocol generation request including an internet protocol option field in which an address is initialized from the terminal; Determining whether the terminal is a simple internet protocol service subscriber, a proxy mobile internet protocol service subscriber, or a mobile internet protocol service subscriber based on the subscription information of the terminal; Assigning a simple internet protocol address to the terminal when the terminal is a simple internet protocol service subscriber; Assigning a proxy mobile internet protocol address to the terminal when the terminal is a proxy mobile internet protocol service subscriber; And Allocating a mobile internet protocol address to the terminal when the terminal is a mobile internet protocol service subscriber; Internet protocol address providing method comprising a. The method of claim 10, Assigning the proxy mobile internet protocol address, Sending a mobile internet protocol registration request to the home agent with the reverse tunneling option field set; And Receiving a mobile internet protocol registration response including a home address assigned by the home agent as an internet protocol address of the terminal from the home agent; Internet protocol address providing method comprising a. The method of claim 9, The allocating step, Receiving an internet protocol control protocol generation request from the terminal that does not include an internet protocol option field or includes a static internet protocol address; Determining whether the terminal is a proxy mobile internet protocol service subscriber based on the subscription information of the terminal; When the internet protocol control protocol generation request does not include the internet protocol option field or when the internet protocol control protocol generation request includes the static internet protocol address and is a mobile internet protocol service subscriber, the mobile terminal transmits a mobile internet protocol address to the terminal. Assigning; And Assigning a proxy mobile internet protocol address to the terminal when the internet protocol generation request includes a static internet protocol address and is a proxy mobile internet protocol service subscriber; Internet protocol address providing method comprising a. The method of claim 12, Assigning the proxy mobile internet protocol address, Sending a mobile internet protocol registration request to the home agent, wherein a reverse tunneling option field is set and includes the home address and an auxiliary address of the packet data service node; Changing, by the home agent, an auxiliary address of an existing packet data service node mapped with the home address to an auxiliary address of a packet data service node received through the mobile internet protocol registration request; And Receiving a mobile internet protocol registration response from the home agent including the home address mapped to an auxiliary address of a packet data service node included in the mobile internet protocol registration request; Internet protocol address providing method comprising a. The method of claim 13, The home agent requesting the call release of the terminal to the existing packet data service node and receiving a response; Internet protocol address providing method further comprising. The method according to any one of claims 9 to 14, Providing to the terminal, And an internet protocol control protocol generation response including a simple internet protocol address assigned to the terminal or the proxy mobile internet protocol address.

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