KR100685256B1 - Method for Allocating Mobile IP for Use in Portable Internet Network - Google Patents

Abstract

The present invention relates to a method for allocating Mobile IP (Internet Protocol) in a portable Internet (Wireless Broadband Internet) network.

The present invention includes the steps of (a) transmitting a message including a care-of address (CoA) to the PSS; (b) Receiving a message including CoA and NAI Extension from PSS, requesting registration of Mobile IP, creating entry for PSS in Visitor List, HA, which is the IP address of HA Obtaining an IP address and requesting initialization of Mobile IP while transmitting a message including CoA and NAI Extension to HA; (c) generating a home address in the HA; And (d) receiving a response message including a message including a home address from the HA, updating the contents of the entry for the PSS in the visitor list, and sending a response message including the home address and the HA IP address to the PSS. It provides a method for initializing Mobile IP in a portable Internet network comprising a.

According to the present invention, it is possible to achieve the standardization of the portable Internet system, thereby to stabilize the portable Internet service using the portable Internet system, and to achieve the uniformity of equipment and system development of the portable Internet system. It can be expected to prevent duplication of investment and reduce development effort.

Mobile Internet, WiBro, Registration, Re-Registration, Initialization, WiBro, Mobile IP

Description

Method for Allocating Mobile IP for Use in Portable Internet Network

1 is a block diagram schematically illustrating a system for allocating Mobile IP in a portable Internet network according to a first embodiment of the present invention;

2 is a flowchart illustrating a method for initializing Mobile IP in a portable Internet network according to a second embodiment of the present invention;

3 is a flowchart illustrating a method for registering Mobile IP in a portable Internet network according to a third embodiment of the present invention;

4 is a flowchart illustrating a method of registering and deleting Mobile IP in a portable Internet network according to a fourth embodiment of the present invention;

5 is a flowchart illustrating a method of re-registering Mobile IP in a portable Internet network according to a fifth embodiment of the present invention.

<Description of Symbols for Main Parts of Drawings>

110: PSS 120: first RAS

122: second RAS 130: first ACR

132: second ACR 140: IP network

150: HA 160: LMS

170: AAA

The present invention relates to a method for allocating Mobile IP (Internet Protocol) in a portable Internet (Wireless Broadband Internet) network. More specifically, in a portable Internet network, a personal subscriber station (PSS) is referred to as a mobile access control router (ACR) and a registration process through a registration process. When Negotiation has been made to assign IP to IPv4, ACR and Home Agent (HA) are called to assign Mobile IP, and Mobile IP is allocated from ACR and HA. The present invention relates to a method for allocating Mobile IP in a portable Internet network.

The mobile communication system has been developed through the first generation analog AMPS (Advanced Mobile Phone System) method and the second generation cellular (Cellular) / Personal Communication Service (PCS) method. The third generation mobile communication system IMT-2000 (International Mobile Telecommunication 2000), which is enacted as a standard in ITU-R, is commercially available. IMT-2000 is a CDMA 2000 1X, 3X, EV-DO, Wide Band CDMA (WCDMA), etc. IS-95A, IS-95B network using IS-95C network evolved from existing IS-95A, IS-95B network It is a service that can provide wireless Internet at a transmission speed of up to 144 Kbps, which is much faster than 14.4 Kbps or 56 Kbps, which is supported by. In particular, by using IMT-2000 service, it is possible to provide various multimedia services (AOD, VOD, etc.) at a faster speed as well as improving existing voice and wireless broadcasting service (WBS) service quality.

However, the existing mobile communication system has a limitation in providing high-speed wireless Internet due to high base station construction cost and high usage fee of the wireless Internet, and a small screen size of the mobile communication terminal. (Wireless Local Area Network) technology has limitations in providing wireless services due to problems such as radio wave interference and narrow coverage. Accordingly, a portable Internet system that can use a high-speed wireless Internet service at a low rate while moving has emerged.

The portable internet system uses various types of portable terminals such as laptops, PDAs, and handheld PCs to access various types of information and content by accessing the Internet in indoor and outdoor stationary environments and in mobile environments with walking speeds and low to medium speeds. It is a service. In addition, IP-based wireless data system that provides mobility of 60 km / h per hour, provides downlink transmission speed of 24 Mbps, and can provide downlink transmission speed of 50 Mbps by applying Multiple Input Multiple Output (MIMO) system. to be.

In addition, the portable Internet system uses a 2.3 GHz frequency band, and draws a time division duplex (TDD) by a duplex method and a multiple access method to effectively use the allocated frequency spectrum. Orthogonal Frequency Division Multiple Access (OFDMA) is used for this purpose.

On the other hand, the mobile Internet system is currently being standardized, but the nodes defined as BSs (BSs) in IEEE 802.16e by IEEE (IEEE) are separated into RAS and ACR between mobile internet operators. The interface procedure between RAS and ACR is different between manufacturers who manufacture portable Internet systems because they do not enact an interface standard for transmitting and receiving call signals.

As described above, when the interface procedure for transmitting and receiving call signals between the RAS and the ACR is different, the following problem occurs. First, since the interface procedure between models is different, there is a problem that compatibility between devices becomes difficult in the process of maintaining a portable Internet system. Although the compatibility problem between the RAS and the ACR is overcome, the interface methods for transmitting and receiving call signals between the RAS and the ACR are different for each cell providing the mobile Internet service. There is a problem that causes a failure.

In addition, since the main purpose of the portable Internet system is to provide Internet services to mobile portable Internet subscribers, one of the essential prerequisites for providing such wireless Internet is an IP address allocation method. Accordingly, the method of allocating an IP address in the portable Internet system must be standardized in advance in order to prevent the occurrence of various failures and solve the compatibility problem between various devices that are components of the portable Internet system.

However, there are no interface specifications for RAS, ACR, and higher devices regarding the IP address assignment.

In order to solve this problem, the present invention provides an ACR and a Home Agent (HA) in the mobile internet network in a state where a negotiation (Negotiation) for PSS to be assigned Mobile IP through ACR is performed. The purpose of the present invention is to provide a method for allocating a Mobile IP in a mobile Internet network that requests Mobile IP allocation and allocates Mobile IP from ACR and HA.

In order to achieve the above object, the present invention provides a personal subscriber station (PSS) using a mobile Internet service, a wireless access device functioning as a base station for providing a mobile Internet service (Radio Access). Station, hereinafter referred to as RAS), an access control router (ACR), which functions as a base station controller for controlling RAS, and acts as a packet access router, and requests for PSS. In a mobile Internet system including a home agent (HA: Home Agent, hereinafter referred to as "HA") for registering Mobile IP, the method of initializing Mobile IP includes: (a) a care-of address (CoA) as a PSS; Transmitting a message comprising a; (b) Receiving a message including CoA and NAI Extension from PSS, requesting registration of Mobile IP, creating entry for PSS in Visitor List, HA, which is the IP address of HA Obtaining an IP address and requesting initialization of Mobile IP while transmitting a message including CoA and NAI Extension to HA; (c) generating a home address in the HA; And (d) receiving a response message including a message including a home address from the HA, updating the contents of the entry for the PSS in the visitor list, and sending a response message including the home address and the HA IP address to the PSS. It provides a method for initializing Mobile IP in a portable Internet network comprising a.

In addition, according to another object of the present invention, a personal subscriber station (PSS: hereinafter referred to as "PSS") using a mobile Internet service, a first wireless access device functioning as a base station for providing a mobile Internet service ( A first access control router (ACR), which functions as a base station controller for controlling a Radio Access Station (hereinafter referred to as RAS), a second RAS, a first RAS, and a second RAS, and acts as a packet access router. In the mobile Internet system including a home agent (HA: Home Agent, hereinafter referred to as 'HA') that registers Mobile IP according to a request of the second ACR and PSS, A method of registering a Mobile IP when moving from a serving area of an ACR to a serving area of a second ACR, the method comprising: (a) transmitting a message including a care-of address (CoA) to a PSS; (b) Receiving a message including CoA and HA IP address from PSS, receiving registration of Mobile IP, creating entry for PSS in Visitor List, and using HA IP address to HA. Requesting registration of Mobile IP while transmitting a message including CoA; (c) updating a previously stored mobility binding entry in the HA; And (d) receiving a response message from the HA notifying that the registration is complete, updating the entry in the visitor list, and sending a response message notifying that the registration is complete to the PSS. Provides a method of registering Mobile IP in a portable Internet network.

In addition, according to another object of the present invention, a personal subscriber station (PSS) using a mobile Internet service (hereinafter referred to as a "PSS"), a wireless access device functioning as a base station for providing a mobile Internet service (Radio Access Station, hereinafter referred to as "RAS"), an access control router (ACR), which functions as a base station controller for controlling RAS, and acts as a packet access router, and requests from PSS In a mobile Internet system including a home agent (HA: Home Agent, hereinafter referred to as "HA") that registers Mobile IP according to the present invention, in the method of registering and deleting Mobile IP while PSS initializes Mobile IP, a) receiving a message containing the configuration information with zero life time from the PSS and requesting the deletion of the registration of the Mobile IP, and entering an entry for the PSS in the visitor list. Creating) and requesting registration deletion of Mobile IP to HA; (b) receiving notification of completion of registration deletion of the Mobile IP from the HA updating the previously stored Mobility Binding Entry; And (c) deleting an entry from the visitor list and notifying the PSS that the registration and deletion of the Mobile IP has been completed.

In addition, according to another object of the present invention, a personal subscriber station (PSS: hereinafter referred to as "PSS") using a mobile Internet service, a wireless access device functioning as a base station for providing a mobile Internet service ( Radio Access Station (hereinafter referred to as "RAS"), an access control router (ACR), which functions as a base station controller for controlling RAS, and acts as a packet access router, and a PSS In a mobile Internet system including a home agent (HA: Home Agent, hereinafter referred to as "HA") that registers Mobile IP on request, the method of re-registering Mobile IP in the state that PSS initialized Mobile IP, (a) Receive a request for re-registration of Mobile IP while receiving a message requesting an update of life time from the PSS, and create an entry for the PSS in the visitor list. And, requesting re-registration of Mobile IP to HA; (b) receiving notification of completion of re-registration of the Mobile IP from the HA updating the previously stored Mobility Binding Entry; And (c) updating an entry in the visitor list and notifying the PSS that re-registration of the mobile IP is completed.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First of all, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are used as much as possible even if displayed on different drawings. In addition, in describing the present invention, when it is determined that the detailed description of the related well-known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

1 is a block diagram schematically illustrating a system for allocating Mobile IP in a portable Internet network according to a first embodiment of the present invention.

In the mobile Internet network according to the first embodiment of the present invention, a system for allocating Mobile IP includes a personal subscriber station (PSS) 110 and a first radio access device (RAS). Access Station, hereinafter referred to as "RAS" 120, the second RAS 122, the first access control router (ACR) 130, the second ACR 132, IP network (Internet Protocol Network) 140, home agent (HA: hereinafter referred to as "HA") 150, location management server (LMS: Location Management Server, hereinafter referred to as "LMS") 160 and billing server (AAA: Accounting, Authentication, Authorization, hereinafter referred to as 'AAA') (170).

Here, the first RAS 120, the second RAS 122, the first ACR 130, the second ACR 132, the IP network 140, the HA 150, the LMS 160, and the AAA 170. One network that includes a will be referred to as a portable Internet network 180 for convenience of description.

The PSS 110 refers to a portable terminal provided with a portable internet service from the portable internet network 180. The PSS 100 includes a low power radio frequency (RF) / IF (intermediate frequency) module, and includes a controller function, a variable control of a MAC (Media Access Control) frame according to a radio wave environment, a handover function, and authentication. And an encryption function. In addition, the PSS 100 is equipped with a browser for accessing the Internet for accessing the portable Internet network 180 to use the portable Internet service.

Here, the PSS 100 may be a personal digital assistant (PDA), a hand-held PC, a notebook PC, a smart phone, a multi-mode multi-band (MM-MB) terminal. In particular, a smart phone is a terminal that combines the advantages of a mobile communication terminal and a personal digital assistant. The smart phone is a terminal that integrates data communication functions such as schedule management, fax transmission and Internet access, etc. Means. In addition, the multi-mode multi-band terminal has a multi-modem chip, and means a terminal that can operate not only in the mobile Internet system but also in other mobile communication systems, for example, CDMA 2000 system, WCDMA system.

In addition, the PSS 110 according to the preferred embodiment of the present invention is in a state where negotiation is made with the first ACR 130 or the second ACR 132 through the registration procedure to be assigned IP to IPv4. 1 ACR 130 or the second ACR 132 and the HA 150 is requested to assign the Mobile IP to receive a Mobile IP address.

The first RAS 120 and the second RAS 122 are base stations of the portable Internet system, and wirelessly transmit packet data received from the first ACR 130 or the second ACR 132 to the PSS 100. , Controller function, orthogonal frequency division multiple access (OFDMA) / time division duplex (TDD) packet scheduling and channel multiplexing function, MAC frame variable control function according to service characteristics and propagation environment, 50 Mbps high-speed traffic real-time control function, handover function And the like. In addition, the PSS 100 and the RAS include a 50 Mbps packet transmission modulation and demodulation function, a high speed packet channel coding function, and a real time modem control function for data transmission.

The first ACR 130 and the second ACR 132 are base station controllers of the portable Internet system. The first ACR 130 and the second ACR 132 each accommodate a first RAS 120 and a second RAS 122, and each of the plurality of RASs or a plurality of RASs accommodated therein. As a packet access router connecting the RAS and the IP network 140, a handover control function between a plurality of RASs 120, a handover function between a plurality of ACRs, and a base station of another network (for example, a CDMA 2000 network or a WCDMA network). It has a handover function, a packet routing function, an Internet access function, etc. between a plurality of RASs, and is connected to the IP network 140. In FIG. 1, only the first ACR 130 and the second ACR 132 are connected to the IP network 140, but in reality, a plurality of ACRs up to the Nth ACR (not shown) may be connected through the IP network 140. In addition, each ACR, that is, the first ACR 130 to the Nth ACR (not shown) is connected to a plurality of RASs, respectively, to control the RAS.

In addition, the first ACR 130 and the second ACR 132 according to the preferred embodiment of the present invention, the IP initialization (Initialization), Mobile IP Registration (Mobile), Mobile IP of the Mobile IP in conjunction with the HA 150 De-Registration, Re-Registration of Mobile IP, and the like, and manage Entry of the Visitor List according to the De-Registration.

The IP network 140 is a backbone network for transmitting and receiving data in the portable Internet network 180 and includes a plurality of network equipment such as a router. In addition, the IP network 140 connects the ACR 130, the HA 150, the LMS 160, the AAA 260, and the like, and receives packet data from an external packet data service such as the Internet (not shown). The first ACR 130 or the second ACR 132 is transmitted.

When using the mobile IP in the mobile Internet network 180, the HA 150 includes software for performing a function of routing a packet transmitted from the outside through the Internet (not shown) and hardware coupled thereto. it means.

In addition, HA 150 according to a preferred embodiment of the present invention in connection with the first ACR 130 and the second ACR 132 IP initialization (Initialization) of Mobile IP, registration of Mobile IP, deletion of registration of Mobile IP (De-Registration), Re-Registration of Mobile IP, and the like, and manage an Entry of Mobility Binding for it.

The LMS 160 refers to software that manages the subscriber's status information and location information and hardware coupled thereto. The LMS 160 provides an incoming service to the PSS 110 from a specific node (for example, a switch connected to the mobile Internet network 180 or a mobile communication network (not shown), an application server connected to the Internet (not shown), etc.). If so, the location information of the PSS 110 is retrieved and transmitted to the first ACR 130 or the second ACR 132. In addition, the LMS 160 stores and manages subscriber status information, subscriber location information, subscriber service information, and the like.

The AAA 170 performs the billing on the packet data used in the PSS 110 in conjunction with the ACR 130, and the software for performing the positioning of the PSS 110 in conjunction with the LMS 160 and coupled thereto. Means hardware.

2 is a flowchart illustrating a method of initializing Mobile IP in a portable Internet network according to a second embodiment of the present invention.

First, in the following description, embodiments of the present invention will be described on the assumption that the PSS 110 is negotiated with the first ACR 130 to allocate an IP address to Mobile IPv4 through a registration procedure. Shall be.

The PSS 110 transmits an SMC / Mobility_Agent_Solicitation message to the first RAS 120 to initialize Mobile IP (S202), and the first RAS 120 transmits an A_SMC_UP / Mobility_Agent_Solicitation message to the first ACR 130. (S202). Even though the first ACR 130 does not receive the Mobility_Agent_Solicitation message from the PSS 110, the first ACR 130 transmits the Mobility_Agent_Advertisement message to a plurality of PSSs 110 that directly control the PSS 110, and the PSS 110 receives the Mobility_Agent_Advertisement message for a predetermined time. If not, the Mobility_Agent_Solicitation message is transmitted to the first ACR 130 to request the Mobility_Agent_Advertisement message. Therefore, the above-described step S202 to step S204 can be omitted.

As described above, the first ACR 130 periodically generates a Mobility_Agent_Advertisement message including a care-of address (CoA) and information on the first ACR 130 as its information and transmits it to the PSS 110. That is, the first ACR 130 generates an A_SMC_UP / Mobility_Agent_Advertisement message (CoA, information of the first ACR 130) and transmits it to the first RAS 120 (S206), and the first RAS 120 sends the SMC / Mobility_Agent_Advertisement. The message CoA (first ACR 130 information) is transmitted to the PSS 110 (S208).

CoA in the present invention means the IP address of the first ACR (130). It is necessary to inform the HA 150 serving the PSS 110 to which ACR the PSS 110 using Mobile IP is located in the ACR when the HA 150 transmits a packet to the PSS 110. A packet can be transmitted by creating an IP tunnel. Accordingly, the first ACR 130 transmits CoA and its information to the PSS 110 through a Mobility_Agent_Advertisement message (CoA, information of the first ACR 130), so that the PSS 110 transmits the Mobile IP to the HA 150. When the address is requested, the address of the first ACR 130, that is, the IP address of the first ACR 130 is transmitted. Receiving the SMC / Mobility_Agent_Advertisement message (CoA, information on the first ACR 130), the PSS 110 obtains CoA, which is an IP address of the first ACR 130 that can be used for communication using a mobile IP address.

After obtaining the CoA of the first ACR 130, the PSS 110 starts a registration procedure using the received CoA. At this time, the PSS 110 has no information about its home address and HA address. Accordingly, the PSS 110 includes the NAI Extension in the message for initiating the registration process so that the first ACR 130 and the HA 150 can identify the PSS 110.

That is, the PSS 110 transmits an SMC / Registration_Request message (CoA, NEI Extension) requesting the allocation of a mobile IP address to the first RAS 120 (S210), and the first RAS 120 sends an A_SMC_UP / Registration_Request message. (CoA, NEI Extension) is transmitted to the first ACR 130 (S212).

Receiving the A_SMC_UP / Registration_Request message (CoA, NEI Extension), the first ACR 120 adds the NEI extension of the PSS 110 to the stored visitor list to generate a new entry, and dynamically The HA IP address is obtained through Dynamic Home Agent Address Resolution. The first ACR 130 checks the obtained HA IP address and transmits a Registration_Request message (CoA, NEI Extension) to the HA 150 serving the PSS 110 (S214).

Upon receiving the Registration_Request message (CoA, NEI Extension), the HA 150 generates a home address to be assigned to the PSS 110 and transmits it to the first ACR 130. At this time, when the NEI Extension is included in the Registration_Request message (CoA, NEI Extension) received in step S214, the NEI Extension is also transmitted. That is, the HA 150 transmits a Registration_Reply message (home address, NEI extension) including the home address and the NEI extension to the first ACR 130 (S216).

Here, the home address refers to the IP address assigned to the PSS 110 by the HA 150. That is, the home address is a Mobile IP address that the PSS 110 will use for IP-based communication. The NEI Extension serves as an identifier for identifying subscribers as a kind of subscriber identification.

Receiving a Registration_Reply message (home address, NEI Extension), the first ACR 130 updates the entry contents in the visitor list using the home address and the NEI extension, and then transfers them to the PSS 110. Here, the first ACR 130 updates the entry contents by registering a home address in the entry of the corresponding NEI extension in the visitor list.

That is, the first ACR 130 updates the entry contents by registering a home address in the entry of the corresponding NEI extension in the visitor list, and includes an A_SMC_DOWN / Registration_Reply message (home address, HA IP address) including the home address and the HA IP address. ) Is transmitted to the first RAS 120 (S218), and the first RAS 120 transmits an SMC / Registration_Reply message (home address, HA IP address) to the PSS 110 (S220).

Through this process, the PSS 110 registers CoA with the HA 150, acquires a home address and an HA IP address, and performs Mobile IP based communication.

3 is a flowchart illustrating a method of registering Mobile IP in a portable Internet network according to a third embodiment of the present invention.

The Mobile IP address is assigned to the PSS 110 using the mobile Internet service while on the move. Therefore, since the PSS 110 can communicate using a plurality of ACRs 130 and 132 according to its movement path, the PSS 130 may change the HA when the first ACR 130 serving itself is changed. It must be registered by notifying 150 that it is under the jurisdiction of the modified second ACR 132. That is, in the case of using a Mobile IP address in the portable Internet system, the ACR 130 acts as a foreign agent (FA), and if the FA is changed, it must be registered with the HA 150, so that the PSS 110 is used. Registers a new FA, the second ACR 132, and performs a registration procedure of the Mobile IP address.

First, in the following description, for convenience of description, as described with reference to FIG. 2, the PSS 110 has completed the initialization of the Mobile IP address, and the first ACR 130 which is an ACR when performing initialization according to the moving path. Suppose that the user moved to the serving area of the second ACR 132, which is a new ACR.

Steps S302 to S304 are the same as steps S202 to S204 described with reference to FIG. 2, and thus a detailed description thereof will be omitted.

The second ACR 132 generates an A_SMC_DOWN / Mobility_Agent_Advertisement message (new CoA, information of the second ACR 132) including the CoA of the second ACR 132 and its information, and transmits it to the second RAS 122. In operation S306, the second RAS 122 transmits an SMC / Mobility_Agent_Advertisement message (new CoA, information of the second ACR 132) to the PSS 110 (S308).

Receiving the SMC / Mobility_Agent_Advertisement message (new CoA, second ACR 132 information), the PSS 110 recognizes that it has moved to the serving area of the new FA, that is, the second ACR 132, and the second ACR 132. Perform a new registration procedure for the new CoA received from).

That is, the PSS 110 transmits an SMC / Registration_Request message (new CoA, HA IP address) to the second RAS 122 (S310), and the second RAS 122 sends an A_SMC_UP / Registration_Request message (new CoA, HA IP). Address) is transmitted to the second ACR 132 (S312).

At this time, the PSS 110 knows the home address and the HA IP address through the Mobile IP initialization procedure described with reference to FIG. 2. Accordingly, the PSS 110 transmits the home address and the HA IP address together to the second ACR 132 while transmitting the above-described message, and the second ACR 132 transmits the home address assigned to the PSS 110 through the same. The HA IP address may be known, and the procedure of obtaining the HA IP address through the dynamic home agent address resolution described in FIG. 2 may be omitted.

Receiving the A_SMC_UP / Registration_Request message (new CoA, HA IP address), the second ACR 132 adds the NAI Extension and home address of the PSS 110 to the visitor list it manages to enter the current PSS 110 entry. Generate and transmit a Registration_Request message (new CoA) to the HA 150 (S314).

Upon receiving the Registration_Request message (new CoA), the HA 150 updates the entry by searching for a managed mobility binding entry and changing a previously registered CoA to a new CoA among the entries of the PSS 110. Since the PSS 110 completes Mobile IP initialization in the first ACR 130 and moves to the second ACR 132, an entry of the PSS 110 exists in the mobility binding of the HA 150. . The HA 150 having updated the entry transmits a Registration_Reply message (registration complete) to the second ACR 132 in order to notify that registration is successfully completed (S316).

Upon receiving the Registration_Reply message (registration complete), the second ACR 132 retrieves and updates an entry of the PSS 110 in the visitor list that it manages, and then sends an A_SMC_DOWN / Registration_Reply message (registration complete) to the second RAS 122. In operation S318, the second RAS 122 transmits an SMS / Registration_Reply message (registration completed) to the PSS 110 (S320).

As a result, the PSS 110 completes the registration procedure in the second ACR 132.

4 is a flowchart illustrating a method of registering and deleting Mobile IP in a portable Internet network according to a fourth embodiment of the present invention.

As described with reference to FIGS. 2 and 3, while the PSS 110 performs communication using the registered Mobile IP address after registering the Mobile IP, when the PSS 110 no longer uses the Mobile IP, the PSS 110 registers the registered Mobile IP. The registration deletion procedure will be performed for the IP. For convenience of explanation, it is assumed that the PSS 110 is initialized by performing the Mobile IP registration procedure described with reference to FIG. 1 with the HA 150 through the first RAS 120 and the first ACR 130.

The PSS 110 transmits a Registration_Request message with a life time of '0' to the HA 150 to delete the registration of the assigned home address.

That is, the PSS 110 sets the survival time of the home address setting information to '0', and transmits an SMC / Registration_Request message (survival time 0) including the setting information to the first RAS 120 (S402). The first RAS 120 transmits an A_SMC_UP / Registration_Request message (survival time 0) to the first ACR 130 (S404).

Receiving the A_SMC_UP / Registration_Request message (survival time 0), the first ACR 130 creates a new entry for the PSS 110 in the managing visitor list and sends a Registration_Request message (survival time 0) to the HA 150. (S406).

Receiving the Registration_Request message (survival time 0), the HA 150 retrieves the managed mobility binding and deletes the entry for the PSS 110, and registers a Registration_Reply message (registration deletion) informing that the registration deletion of the Mobile IP has been completed successfully. ) Is transmitted to the first ACR 130 (S408).

After receiving the Registration_Reply message (registration deletion), the first ACR 130 searches for the visitor list to manage and deletes the entry for the PSS 110, and then sends the A_SMC_DOWN / Registration_Reply message (registration deletion) to the first RAS 120. In step S410, the first RAS 120 transmits an SMC / Registration_Reply message (registration deletion) to the PSS 110 (S412).

As such, the PSS 110 completes the Mobile IP registration deletion procedure and no longer uses the Mobile IP.

5 is a flowchart illustrating a method of re-registering Mobile IP in a portable Internet network according to a fifth embodiment of the present invention.

As described with reference to FIGS. 2 and 3, the PSS 110 registers the Mobile IP and performs communication using the registered Mobile IP address before the Binding Life Time expires. If you want to continue to use CoA, re-registration process is performed by requesting update of survival time for registered Mobile IP. For convenience of explanation, it is assumed that the PSS 110 is initialized by performing the Mobile IP registration procedure described with reference to FIG. 1 with the HA 150 through the first RAS 120 and the first ACR 130.

The PSS 110 requests the HA 150 to update the survival time of the mobility binding entry to extend the survival time of the currently used CoA.

That is, the PSS 110 transmits an SMC / Registration_Request message (survival time update request) to update the survival time to the first RAS 120 (S502), and the first RAS 120 sends an A_SMC_UP / Registration_Request message (survival). Time update request) is transmitted to the first ACR 130 (S504).

Receiving the A_SMC_UP / Registration_Request message (survival time update request), the first ACR 130 creates a new entry for the PSS 110 in the managing visitor list, and generates a Registration_Request message (survival time update request) in the HA 150. Transfer to (S506).

Receiving the Registration_Request message (survival time update request), HA 150 retrieves the managed mobility binding entry to update the binding survival time in the entry for PSS 110 and notifies that the update of the binding survival time has been completed successfully. The Registration_Reply message (survival time update complete) is transmitted to the first ACR 130 (S508).

Receiving the Registration_Reply message (survival time update complete), the first ACR 130 retrieves the managing visitor list and updates the entry for the PSS 110, and then receives the A_SMC_DOWN / Registration_Reply message (survival time update complete). The first RAS 120 transmits an SMC / Registration_Reply message (registration deletion) to the PSS 110 (S512).

Thus, the PSS 110 completes the Mobile IP re-registration procedure and continues to use the Mobile IP.

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains may make various modifications and changes without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

As described above, according to the present invention, a method of PSS initializing Mobile IP through ACR and HA in mobile Internet network, a method of registering Mobile IP according to ACR change according to movement, and deleting registration of Mobile IP It is possible to achieve the standardization of the mobile Internet system for the method, the mobile method, etc., thereby to stabilize the mobile Internet service using the mobile Internet system, and to achieve the uniformity of equipment and system development of the mobile Internet system. It can be expected to prevent duplicate investment in the system and reduce development effort.

Claims (19)

A personal subscriber station (PSS) using a mobile Internet service (hereinafter referred to as a "PSS") and a wireless access device functioning as a base station for providing the mobile Internet service (Radio Access Station, referred to as "RAS") And an access control router (ACR), which functions as the base station controller for controlling the RAS and operates as a packet access router, and registers Mobile IP according to the request of the PSS. In a mobile Internet system including a home agent (HA: hereinafter referred to as "HA"), the method for initializing the Mobile IP, (a) transmitting a message including a care-of address (CoA) to the PSS; (b) Receiving a message including the CoA and NAI Extension from the PSS while receiving a request for registration of the Mobile IP to generate an entry for the PSS in the Visitor List, the IP address of the HA Obtaining an HA IP address (Address) and requesting initialization of the Mobile IP while transmitting a message including the CoA and the NAI Extension to the HA; (c) generating a home address in the HA; And (d) receiving a response message including the message including the home address from the HA, updating the contents of the entry for the PSS in the visitor list, and sending a response message including the home address and the HA IP address. Transmitting to the PSS Method for initializing Mobile IP in a mobile Internet network comprising a. The method of claim 1, wherein step (a) comprises: (a1) transmitting an A_SMC_DOWN / Mobility_Agent_Advertisement message including information of the CoA and the ACR to the RAS; And (a2) transmitting, by the RAS, an SMC / Mobility_Agent_Advertisement message including information of the CoA and the ACR to the PSS; Method for initializing Mobile IP in a mobile Internet network comprising a. The method of claim 1, wherein step (b) comprises: (b1) transmitting an SMC / Registration_Request message including the CoA and the NAI Extension to the RAS in the PSS; (b2) transmitting, by the RAS, an A_SMC_UP / Registration_Request message including the CoA and the NAI Extension to the ACR; (b3) generating the entry by identifying the PSS using the NAI Extension in the ACR and adding the NAI Extension in the visitor list; (b4) obtaining the HA IP address using Dynamic Home Agent Address Resolution in the ACR; And (b5) transmitting a Registration_Request message including the CoA and the NAI Extension to the HA by using the HA IP address in the ACR; Method for initializing Mobile IP in a mobile Internet network comprising a. The method of claim 1, wherein step (d) (d1) receiving a Registration_Reply message including the home address and the NAI Extension from the HA in the ACR; (d2) updating the entry by identifying the PSS using the NAI Extension in the ACR and registering the home address with the entry in the visitor list; (d3) transmitting, by the ACR, an A_SMC_DOWN / Registration_Reply message including the home address and the HA IP address to the RAS; And (d4) transmitting an SMC / Registration_Reply message including the home address and the HA IP address to the PSS in the RAS; Method for initializing Mobile IP in a mobile Internet network comprising a. The method of claim 1, wherein the method is Before step (a) above, (a-1) transmitting an SMC / Mobility_Agent_Solicitation message requesting information of the ACR to the RAS in the PSS; And (a-2) transmitting, by the RAS, an A_SMC_UP / Mobility_Agent_Solicitation message requesting the ACR information to the ACR; Method for initializing Mobile IP in a mobile Internet network, characterized in that it further comprises. A personal subscriber station (PSS) using a mobile Internet service (hereinafter referred to as a "PSS") and a first wireless access device (Radio Access Station, RAS) functioning as a base station for providing the mobile Internet service. And a first access control router (ACR), which functions as a base station controller for controlling the first RAS and the second RAS and operates as a packet access router. And a home agent (HA: Home Agent, hereinafter referred to as 'HA') for registering Mobile IP in response to a request of the PSS and the second ACR, wherein the PSS serves the first ACR. In the method for registering the Mobile IP when moving from the serving area to the serving area of the second ACR, (a) transmitting a message including a care-of address (CoA) to the PSS; (b) receiving a message including the CoA and HA IP address from the PSS, receiving registration of the Mobile IP, creating an entry for the PSS in a visitor list, and generating the HA IP address. Requesting registration of the Mobile IP while transmitting a message including the CoA to the HA by using; (c) updating a previously stored mobility binding entry in the HA; And (d) receiving a response message notifying that the registration is completed from the HA, updating the entry in the visitor list, and sending a response message notifying that the registration is complete to the PSS The method of registering a Mobile IP in a mobile Internet network comprising a. The method of claim 1, wherein step (a) comprises: (a1) transmitting, by the second ACR, an A_SMC_DOWN / Mobility_Agent_Advertisement message including information of the CoA and the second ACR to the second RAS; And (a2) transmitting an SMC / Mobility_Agent_Advertisement message including information of the CoA and the second ACR to the PSS in the second RAS; How to register a Mobile IP in a mobile Internet network comprising a. The method of claim 1, wherein step (b) comprises: (b1) transmitting, at the PSS, an SMC / Registration_Request message including the CoA and the HA IP address to the second RAS; (b2) transmitting, by the second RAS, an A_SMC_UP / Registration_Request message including the CoA and the HA IP address to the second ACR; (b3) generating the entry by identifying the PSS using the NAI Extension in the second ACR and adding the NAI Extension and the home address to the PSS in the visitor list; And (b4) transmitting a Registration_Request message including the CoA to the HA using the HA IP address in the second ACR; The method of registering a Mobile IP in a mobile Internet network comprising a. The method of claim 1, wherein step (c) comprises: And searching for the mobility binding entry in the HA and updating the mobility binding entry by changing a pre-registered CoA among the entries of the PSS to the CoA. The method of claim 1, wherein step (d) (d1) receiving a Registration_Reply message informing the completion of the registration from the HA in the second ACR; (d2) updating the entry by retrieving the visitor list in the second ACR; (d3) transmitting, by the second ACR, an A_SMC_DOWN / Registration_Reply message to notify the second RAS that the registration has been completed; And (d4) transmitting an SMC / Registration_Reply message to the PSS informing that the registration is completed in the second RAS; The method of registering a Mobile IP in a mobile Internet network comprising a. The method of claim 1, wherein the method is Before step (a) above, (a-1) transmitting, by the PSS, an SMC / Mobility_Agent_Solicitation message requesting information of the second ACR to the RAS; And (a-2) transmitting, by the RAS, an A_SMC_UP / Mobility_Agent_Solicitation message requesting the information of the second ACR to the ACR; The method of registering a Mobile IP in a mobile Internet network, characterized in that it further comprises. A personal subscriber station (PSS) using a mobile Internet service (hereinafter referred to as a "PSS") and a wireless access device functioning as a base station for providing the mobile Internet service (Radio Access Station, referred to as "RAS") And an access control router (ACR), which functions as the base station controller for controlling the RAS and operates as a packet access router, and registers Mobile IP according to the request of the PSS. In a mobile Internet system including a home agent (HA: hereinafter referred to as 'HA'), the method of registering and deleting the Mobile IP in the state where the PSS initializes the Mobile IP, (a) receiving a message including configuration information of zero life time from the PSS, requesting registration deletion of the Mobile IP, and entering an entry for the PSS in a visitor list. Generating and requesting registration deletion of the Mobile IP from the HA; (b) receiving notification that the registration deletion of the Mobile IP is completed from the HA updating the previously stored Mobility Binding Entry; And (c) deleting the entry from the visitor list and notifying the PSS that the registration deletion of the Mobile IP is completed; Method of registering and deleting Mobile IP in a mobile Internet network comprising a. The method of claim 12, wherein step (a) comprises: (a1) transmitting an SMC / Registration_Request message including the configuration information from the PSS to the RAS; (a2) transmitting, by the RAS, an A_SMC_UP / Registration_Request message including the configuration information to the ACR; (a3) generating the entry in the visitor list in the ACR; And (a4) transmitting a Registration_Request message including the configuration information from the ACR to the HA Method of registering and deleting Mobile IP in a mobile Internet network comprising a. The method of claim 12, wherein step (b) comprises: (b1) retrieving the mobility binding entry from the HA and deleting the entry; And (b2) transmitting a Registration_Reply message to the ACR informing that the HA has completed the registration deletion of the Mobile IP; Method of registering and deleting Mobile IP in a mobile Internet network comprising a. The method of claim 12, wherein step (c) comprises: (c1) updating the mobility binding entry by retrieving the visitor list from the ACR and deleting the entry for the PSS; (c2) transmitting, by the ACR, an A_SMC_DOWN / Registration_Reply message notifying that the registration deletion of the Mobile IP is completed to the RAS; And (c3) transmitting, by the RAS, an SMC / Registration_Reply message notifying that the registration deletion of the Mobile IP is completed to the PSS; Method of registering and deleting Mobile IP in a mobile Internet network comprising a. A personal subscriber station (PSS) using a mobile Internet service (hereinafter referred to as a "PSS") and a wireless access device functioning as a base station for providing the mobile Internet service (Radio Access Station, referred to as "RAS") And an access control router (ACR), which functions as the base station controller for controlling the RAS and operates as a packet access router, and registers Mobile IP according to the request of the PSS. In a mobile Internet system including a home agent (HA: hereinafter referred to as 'HA'), the method of re-registering the Mobile IP in the state that the PSS initialized Mobile IP, (a) receiving a message requesting an update of a life time from the PSS, receiving a request for re-registration of the Mobile IP, generating an entry for the PSS in a visitor list; Requesting re-registration of the Mobile IP to the HA; (b) receiving notification that the re-registration of the Mobile IP is completed from the HA updating the previously stored Mobility Binding Entry; And (c) updating the entry in the visitor list and notifying the PSS that re-registration of the Mobile IP has been completed; Method for re-registering Mobile IP in a mobile Internet network comprising a. The method of claim 16, wherein step (a) (a1) transmitting, by the PSS, an SMC / Registration_Request message requesting an update of the life time to the RAS; (a2) transmitting, by the RAS, an A_SMC_UP / Registration_Request message requesting the update of the survival time to the ACR; (a3) generating the entry in the visitor list in the ACR; And (a4) transmitting a Registration_Request message to the HA requesting the ACR to update the survival time; Method for re-registering Mobile IP in a mobile Internet network comprising a. The method of claim 16, wherein step (b) comprises: (b1) searching the mobility binding entry in the HA to determine whether an entry for the PSS is already stored, and updating the entry by extending the binding survival time of the entry; And (b2) transmitting a Registration_Reply message to the ACR informing that the re-registration of the Mobile IP is completed in the HA; Method for re-registering Mobile IP in a mobile Internet network comprising a. The method of claim 16, wherein step (c) comprises: (c1) updating the entry by retrieving the visitor list in the ACR and extending the survival time for the entry; (c2) transmitting, by the ACR, an A_SMC_DOWN / Registration_Reply message notifying that the re-registration of the Mobile IP is completed to the RAS; And (c3) transmitting, by the RAS to the PSS, an SMC / Registration_Reply message indicating that the re-registration of the Mobile IP is completed; Method for re-registering Mobile IP in a mobile Internet network comprising a.

Images