KR20010028061A - Router and message for roamming support between mobile IP protocol and wire/wireless communication system - Google Patents

Abstract

PURPOSE: A routing device supporting a mutual roaming between a mobile IP(Internet Protocol) and a communication system is provided to basically mount a support function for the mobile IP protocol, and to adopt same routers to each system, so as to support a mobility of a terminal and a mutual roaming between each communication system, and to support a data exchange function of an IP(Internet Protocol) layer. CONSTITUTION: A mobile IP(Internet Protocol) supporting block(102) supports a roaming between a mobile IP and a communication system. FAs(Foreign Agents)(104,107) store register information of a terminal. HAs(Home Agents)(105,108) store an FA internet address of a terminal visiting an other region as a care-of address. A switching block(101) is connected to the IP supporting block(102), the FAs(104,107), and the HAs(105,108), and performs a data exchanging function with an exterior. A wireless communication protocol block(103) is connected with the switching block(101) to support a wireless communication protocol, and is connected with the mobile IP supporting block(102) to support a roaming between communication systems. VLRs(Visitor Location Registers)(106,107) are connected with the wireless communication protocol supporting block(103), and store register information of the terminal visiting the other region, A HLR(Home Location Register)(110) is connected with the wireless communication protocol supporting block(103), and stores terminal information.

Description

Routing device supporting roaming between mobile internet protocol and communication system and method thereof {Router and message for roamming support between mobile IP protocol and wire / wireless communication system}

The present invention relates to a routing device and a method thereof, and more particularly, in a public wireless communication system, a wireless private switched communication system and a wired / wireless short-range communication system to support mobility of terminals and roaming between communication systems, and to exchange data in an Internet protocol layer. A routing device and a method for supporting roaming between a mobile Internet protocol and a communication system capable of supporting a function are provided.

In order to guarantee the mobility of a terminal in a public wireless communication system, a wireless private switched communication system, and a wired / wireless local area communication system, support for a network layer protocol supporting mobility such as a mobile Internet protocol is required. In particular, IS-95, IS- In the case of public wireless communication systems and wireless short-range communication systems employing protocols such as 54 and IS-136, support for the IS-41 series protocol that defines functions for supporting terminal mobility is also required.

However, in the related art, such mobility support related protocols are supported through separate methods, and public wireless communication systems, wired short-range communication systems, and wireless short-range communication systems each support mobility in different ways.

In addition, such a conventional technology is difficult to construct a system in an efficient, inexpensive, and easy-to-maintain manner, and it is difficult to link a public wireless communication system, a wireless private switched communication system, and a wired / wireless local area communication system. .

SUMMARY OF THE INVENTION The present invention has been made to solve the problems of the prior art as described above, and basically includes the same router that has built-in support for the mobile Internet protocol and can optionally have built-in support for the IS-41 protocol. Adopted in each system, it supports roaming between mobile internet protocol and communication system that can support mobility of terminal and roaming between each communication system in wireless private switched communication system and wired / wireless short-range communication system and support data exchange function of internet protocol layer. It is an object of the present invention to provide a routing device and a method thereof.

1 is a block diagram of a routing device supporting roaming between a mobile internet protocol and a communication system according to an embodiment of the present invention;

2 is a flowchart of a new terminal registration and mobility support process in a wired local area communication system according to an embodiment of the present invention;

3 is a flowchart of a new terminal registration process in a public wireless communication system, a wireless private switched communication system and a wireless local area communication system according to an embodiment of the present invention;

4 is a flowchart of a mobility support process in a public wireless communication system, a wireless private switched communication system, and a wireless local area communication system according to an embodiment of the present invention;

5 is a flowchart of a data transmission process to a mobile terminal according to an embodiment of the present invention;

6 is a flowchart illustrating a roaming process between a public wireless communication system, a wireless private switched communication system, and a wireless local area communication system according to an embodiment of the present invention;

7 is a flowchart illustrating a roaming process from one of the public wireless communication system, the wireless private switched communication system, and the wireless local area communication system to the wired local area communication system according to an embodiment of the present invention;

8 is a flowchart of a roaming process from a wired local area communication system to one of a public wireless communication system, a wireless private switched communication system, and a wireless local area communication system according to an embodiment of the present invention.

♠ Explanation of symbols on the main parts of the drawing ♠

101: switching block 102: mobility Internet protocol support block

103: IS-41 support block 104: out-of-zone agent

105: Home Agent 106: Visitor Location Register

107: Out-of-zone agent 108: Home agent

109: Visitor Location Register 110: Home Location Register

According to the present invention for achieving the object as described above, the mobile Internet protocol support block for roaming between the mobile Internet protocol and the communication system, the out-of-zone agent and other information that stores the registration information of the mobile terminal A routing device having a home agent storing an out-of-zone agent internet address of a visiting area of a terminal visiting a region as a care of address, the routing device comprising: the internet protocol support block, the out-of-zone agent, and A switching block connected to a home agent and configured to perform a function of exchanging data with an outside; A wireless communication protocol support block connected to the switching block to support a wireless communication protocol, and connected to the mobile internet protocol support block to support roaming between communication systems; A visitor location register connected to the wireless communication protocol support block to store registration information of a terminal visited from another area; And a home location register connected to the wireless communication protocol support block to store information of a terminal under jurisdiction.

According to the present invention, there is provided a routing method for roaming between a mobile Internet protocol and a communication system in a wired local area system, comprising: a first step of a terminal starting a wired connection to perform an agent discovery protocol in the terminal; A second step of detecting an out-of-zone agent and transmitting registration information of the terminal; The out-of-area agent transmits information of the registered terminal to a home agent registered with the terminal; And a fourth step of registering the internet address of the out-of-zone agent as the care of address of the terminal in the home agent.

In addition, according to the present invention, in a routing method supporting roaming between a mobile Internet protocol and a communication system applied to a public wireless communication system, a wireless private switching communication system, and a wireless local area communication system, the terminal starts wireless data communication. A first step of transmitting registration information of the terminal from the base station controller (BSC) to the visitor location register; A second step of transmitting a registration approval request message from the visitor location register to a registered home location register; Receiving a registration approval message from the home location register and registering registration information of the terminal with the visitor location register; And a fourth step in which the out-of-zone agent transmits registration information of the terminal to the home agent and registers the out-of-zone agent internet address as the care of address of the terminal.

In addition, according to the present invention, in a routing method supporting roaming between a public wireless communication system, a mobile Internet protocol and a communication system applied to a wireless private exchange system and a wireless local area communication system, data is transmitted to a base station connected to different routers. A first step of performing data buffering at an out-of-zone agent to which the terminal belongs as handoff of the terminal initiating communication starts; A second step of transmitting registration information of the terminal from the base station controller to be handed off to the visitor location register; A third step of transmitting, from the visitor location register, a registration approval request message to the registered home location register of the terminal; Receiving a registration approval message from the home location register and deleting the location information of the terminal from the visitor location register to which the terminal belongs; Receiving a registration approval message from the home location register and registering registration information of the terminal with the visitor location register; A sixth step in which the out-of-zone agent transmits registration information of the terminal to the home agent and registers the out-of-zone agent internet address as the care of address of the terminal; And a seventh step of transmitting data buffered in the out-of-zone agent to which the terminal belongs to the out-of-zone agent to be handed off.

In addition, according to the present invention, in a public wireless communication system supporting roaming mutually, and a routing method supporting roaming between mobile internet protocols and communication systems applied to a wireless private exchange system and a wireless local area communication system, Finding a radio wave signal capable of communicating in another radio communication system capable of communication; A second step of determining whether a home location register exists in a system to roam as service is available in a system to roam; A third step of disconnecting the connection with the system being communicated after changing the care-of address through an agent solicitation if the terminal does not exist, as a result of the determination of the second step: After performing the new terminal registration, there is provided a routing method comprising a fourth step of transmitting data.

In addition, according to the present invention, in a public wireless communication system that supports roaming in a wired local area system, and a routing method that supports roaming between mobile Internet protocols and communication systems applied to a wireless private exchange system and a wireless local area communication system, A first step of changing a care-of address through an agent solicitation in the terminal as the terminal is connected to a wired local area communication system; And a second step of disconnecting the connection with the system in communication at the terminal.

According to the present invention, there is also provided a routing method supporting roaming between a mobile Internet protocol and a communication system supporting roaming from a wired local area system to a public wireless communication system, a wireless private switching system, and a wireless local area communication system. A first step of performing data buffering at the home agent; Finding a system to roam and determining whether a home location register exists in the system to roam; A third step of changing the care-of address through an agent solicitation if the terminal does not exist as a result of the determination of the second step; And a fourth step of transmitting data after performing a new terminal registration if there is a determination result of the second step.

In the following, a preferred embodiment of a routing device and a method for supporting roaming between a mobile Internet protocol and a communication system according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of a routing device supporting roaming between a mobile internet protocol and a communication system according to an embodiment of the present invention.

As shown in the figure, a routing device supporting roaming between a mobile internet protocol and a communication system according to an embodiment of the present invention includes a switching block 101, a mobile internet protocol support block 102, and an IS-41 support. Block 103, out-of-area agent 104 and 107, home agent 105 and 108, visitor location registers 106 and 109 and home location register 110 are provided.

The router supporting mobility in the Internet Protocol (IP) layer proposed by the present invention has a built-in support for the mobility Internet protocol in order to support mobility in the IP layer, and at the same time IS-95, IS- For compatibility with public wireless communication systems and wireless short-range communication systems that adopt protocols such as 54 and IS-136, it should be possible to incorporate support for the IS-41 protocol.

In addition, if the built-in support function for the IS-41 protocol is embedded, the visitor location register (VLR) 106 or 109 among the elements for mobility support in the IS-41 protocol is embedded in a router and is independent. It is possible to configure the mobile terminal to be shared with the Mobile Switching Center (MSC) that manages the base station that is communicating with each other or separated from the router. In the case of the Home Location Register (HLR) 110, By separating from the router, the mobile terminal can be configured to share the base station with which the mobile station is communicating with the MSC.

In addition, the foreign agent (FA) 104 and 107 and the home agent (HA) 105 and 108 defined in the mobile Internet protocol are embedded in a router or connected to separate interfaces.

Each router has a corresponding visitor location register (VLR) 106, 109, home location register (HLR) 110, out-of-zone agent (FA) 104, 107, and home agent (HA) 105, 108. ) Must be connected.

Now, the operation of a routing device supporting roaming between a mobile Internet protocol and a communication system according to an embodiment of the present invention will be described in detail.

First, the switching block 101 performs a function of exchanging data with a data network or a base station controller, and the mobile internet protocol block 102 is connected with the switching block 101 to support mobile internet protocol, and IS-41 It is connected to the support block 103 to perform a function of providing roaming between communication systems.

In addition, the IS-41 support block 103 is connected to the switching block 101 to perform the function of supporting the IS-41 protocol with the help of network and functional elements supporting the externally located IS-41 and mobility. It is connected to the Internet protocol support block 102 to perform a function of supporting roaming between communication systems.

In addition, the out-of-zone agent 104 receives and stores the terminal information of the visitor visited from another area, and transmits the Internet protocol address and the terminal information to the home agent 105 of the router of the visitor's home area. Perform.

The out-of-zone agent 104 buffers data to be transmitted when there is a handoff during communication, and transmits the data stored in the new out-of-zone agent 104 when the registration procedure of the mobile terminal is completed. .

On the other hand, the home agent 105 is connected to the mobile Internet protocol support block 102 and stores the information of the terminal under the jurisdiction, the Internet address and visiting visitor terminal information from the out-of-zone agent 104 of the other router If you input the Internet address of the out-of-zone agent 104, 107 of the other router is registered as a care-of address (care-of address).

When receiving a data transmission request from the terminal under the jurisdiction, the data is transmitted to the visiting router using the stored care of address.

The visitor location registers 106 and 109 perform a function of registering information of a terminal visited from another region, and transmit the registration information to the home location register 110 of another region.

In addition, the home location register 110 stores information (including the current location) of the terminal under the jurisdiction.

2 is a flowchart of a new terminal registration and mobility support process in a wired local area communication system according to an embodiment of the present invention.

As shown in the figure, a new terminal registration and mobility support process in a wired local area communication system according to an embodiment of the present invention, registering a new terminal in a wired local area communication system or other terminals by separating the terminal from a specific connection during use When connected to the Internet, according to the mobility Internet protocol to support mobility in the following ways.

First, when a terminal attempts to start a wired connection or is disconnected from a connection during a wired connection and then connected to the connection again, the terminal uses the Agent Discovery Protocol to connect to a router corresponding to the area to which it belongs. Find out-of-connected agents.

That is, it is determined whether the terminal wired connection is started in the standby state 201 (202), if not started, the process proceeds to the standby state 201, and if started, the agent performs the agent discovery protocol (203), the zone Find other agents.

Subsequently, it is determined whether the out-of-zone agent is found (204). If not, the process is repeated from the process of performing the agent discovery protocol (203), and if found, the terminal is detected as the out-of-zone agent. Send registration information (205).

Next, the out-of-zone agent transmits the registration information of the terminal to the home agent in which the terminal is registered (206), and in the home agent, registers the Internet address of the out-of-zone agent as the care-of address of the terminal (207).

3 is a flowchart of a new terminal registration process in a public wireless communication system, a wireless private switched communication system and a wireless local area communication system according to an embodiment of the present invention.

As shown in the figure, the new terminal registration process in the public wireless communication system, wireless private switching communication system and wireless short-range communication system according to an embodiment of the present invention, IS-95, IS-54 and IS-136, etc. When a new terminal is registered in a public wireless communication system, a wireless private switching communication system, and a wireless local area communication system complying with the wireless communication system protocol of the mobile station, mobility is supported in the following manner according to IS-41 and mobile Internet protocol.

First, in a standby state (301), when the terminal is to start a wireless connection, the base station controller connected to the base station (BS) to which the terminal belongs to determines whether the terminal is to start data communication (302). (Can be omitted for communication systems that support only data communication)

If it is determined that the data communication is not to be started, the process proceeds to the standby state 301, and when the data communication is to be started, that is, when the terminal is to start the data communication or only supports data communication. In the case, the base station controller sends the registration information of the terminal to the router (303).

After that, the router sends a registration message to the home location register (HLR) where the terminal is registered (304).

Next, the home location register determines whether the terminal can be serviced (305), and if the service is unavailable, terminates the connection of the terminal (310), and if the terminal is available, the home location register sends a registration acknowledgment to the visitor location. Send to register VLR (306).

Thereafter, the visitor location register (VLR) registers the registration information of the terminal based on the registration approval signal sent from the home location register (HLR) (307).

Next, the out-of-zone agent of the router to which the terminal is connected sees the registration information of the terminal and sends the out-of-zone agent and the registration information of the terminal to the home agent connected to the router corresponding to the zone where the terminal is registered (308).

Thereafter, the home agent registers the Internet address of the out-of-zone agent as the care-of address of the terminal by using the received out-of-zone agent and the registration information of the terminal (309).

4 is a flowchart of a mobility support process in a public wireless communication system, a wireless private switched communication system, and a wireless local area communication system according to an embodiment of the present invention.

As shown in the figure, the mobility support process in the public wireless communication system, wireless private switched communication system and wireless short-range communication system according to an embodiment of the present invention, such as IS-95, IS-54 and IS-136 When a terminal is moved and handed off in a public wireless communication system, a wireless private switched communication system, and a wireless local area communication system that conforms to the wireless communication system protocol, mobility is supported in the following manner according to IS-41 and mobile Internet protocol.

First, when the handoff process of the terminal that is performing data communication is started in the standby state (401) (402), the BS controller to which the BS (BS_OLD) to which the terminal belongs and the BS (BS_NEW) to which the terminal is to be handed off are connected, respectively. It is determined whether BS_OLD and BS_NEW are connected to the same router (403).

As a result of the determination, if the UE is connected to the same router, it stores in the base station controller that the location of the terminal is changed from BS_OLD to BS_NEW (417).

As a result, when BS_OLD and BS_NEW are connected to different routers, the out-of-zone agent of BS_OLD starts buffering data (405).

Thereafter, the base station controller to which the BS_NEW is connected sends the registration information of the terminal to the router R_NEW to which the BS_NEW is connected (406).

Next, after the R_NEW sends a registration message to the home location register where the terminal is registered (407), the home location register requests the terminal location information deletion to the visitor location register connected to the router (R_OLD) to which BS_OLD is connected ( 408).

Thereafter, the VLR_OLD deletes the terminal location information (409) and sends a deletion acknowledgment signal to the home location register (410).

Next, when the home location register (HLR) receives the delete approval signal sent by VLR_OLD (411), and sends a delete approval signal to the visitor location register connected to the R_NEW (412).

Next, the VLR_NEW registers the registration information of the terminal based on the registration acknowledgment signal sent from the home location register (413).

Subsequently, the out-of-zone agent of the R_NEW reports the registration information of the terminal and sends the registration information of the terminal and the FA_NEW to the home agent connected to the router corresponding to the zone where the terminal is registered (414).

Next, the home agent registers the Internet address of FA_NEW as the care of address of the terminal using the received FA_NEW and the registration information of the terminal (415), and FA_OLD transmits the buffered data to the FA_NEW (416).

Step 405 and step 416 can be omitted at the same time when a method of retransmitting the lost data without buffering the transmitted data is adopted.

5 is a flowchart of a data transmission process to a mobile terminal according to an embodiment of the present invention.

As shown in the figure, the data transmission process to the mobile terminal according to an embodiment of the present invention, the process of transmitting data to the mobile terminal in the communication system of the mobility guaranteed terminal is as follows.

First, the data transmission terminal transmits data to the Internet address of the mobile terminal (501).

Thereafter, the home agent with which the mobile terminal is registered intercepts data transmitted to the Internet address of the mobile terminal (502).

The home agent then tunnels the data to the registered care of address (503).

In addition, since the care-of address is an Internet address of an out-of-zone agent connected to the router to which the mobile terminal is currently connected, the data is transmitted to the out-of-zone agent, and the out-of-zone agent removes the tunneling header and then the data through the router. The terminal transmits the terminal to the terminal (504).

Meanwhile, when adopting a router that simultaneously supports the mobile Internet protocol proposed by the present invention in a public wireless communication system, a wireless private switched communication system, and a wired / wireless local area communication system, when using the same terminal supporting a plurality of communication systems, Roam between systems.

Hereinafter, a description will be given of roaming support methods between four communication systems, that is, a public wireless communication system, a wireless private switched communication system, a wireless local area communication system, and a wired local area communication system.

6 is a flowchart of a roaming process between a public wireless communication system, a wireless private switched communication system, and a wireless local area communication system according to an embodiment of the present invention.

As shown in the figure, the roaming support method between the three wireless communication system of the public wireless communication system, wireless private switched communication system and wireless short-range communication system according to an embodiment of the present invention is as follows, It is assumed that the wireless communication system uses different frequency bands, and that the terminal has a function of using two or more wireless communication systems.

First, if the strength of all radio signals capable of communication corresponding to the frequency band of the wireless communication system currently in use falls below a threshold value (602), the terminal receives radio signals capable of communicating in the frequency band of another radio communication system that can communicate with the terminal. Find (603).

In addition, even if the radio signal of the wireless communication system currently in use does not fall below a threshold value, the terminal may communicate in a frequency band of another wireless communication system capable of communication in order to support roaming to a cheaper or more convenient wireless communication system. Radio signals can be found periodically or aperiodically.

Subsequently, when a radio wave signal that can be communicated is found, a call establishment process in a radio region for roaming to a radio communication system corresponding to the found radio wave signal is performed (604).

Next, when the call setup in the wireless area is completed, the router installed in the wireless communication system that accepts roaming determines whether or not the terminal is available at the home location register (605).

As a result of the determination, if the use is not possible, the terminal connection is terminated (618).

If it is determined that the wireless communication system that accepts roaming is a wireless private switched communication system or a wireless local area communication system, and there is no home location register, the terminal may transmit the current care of service through agent solicitation defined in the mobile Internet protocol. The new address is changed (619) and the connection with the conventional wireless communication system is disconnected (620).

As a result, if there is a home location register, the out-of-zone agent of BS_OLD starts buffering data (607).

Subsequently, the base station controller to which the BS_NEW is connected sends the registration information of the terminal to the router R_NEW to which the BS_NEW is connected (608).

Next, after the R_NEW sends a registration message to the home location register where the terminal is registered (609), the home location register requests the terminal location information deletion to the visitor location register connected to the router (R_OLD) to which BS_OLD is connected ( 610).

Thereafter, the VLR_OLD deletes the terminal location information (611), and sends a delete approval signal to the home location register (612).

Next, when the home location register (HLR) receives the delete approval signal sent by VLR_OLD (613), and sends a delete approval signal to the visitor location register connected to the R_NEW (614).

Next, the VLR_NEW registers the registration information of the terminal based on the registration approval signal sent from the home location register (615).

Afterwards, the out-of-zone agent of the R_NEW reports the registration information of the terminal and sends the registration information of the terminal and the FA_NEW to the home agent connected to the router corresponding to the zone where the terminal is registered (616).

Next, the home agent registers the Internet address of FA_NEW as the care of address of the terminal using the received FA_NEW and the registration information of the terminal (617), and FA_OLD transmits the buffered data to the FA_NEW (618).

Step 607 and step 617 can be omitted at the same time in the case of adopting a method of retransmitting lost data without buffering the transmitted data.

7 is a flowchart of a roaming process from one of the public wireless communication system, the wireless private switched communication system, and the wireless local area communication system to the wired local area communication system according to one embodiment of the present invention.

As shown in the drawings, a roaming process from one of the public wireless communication system, the wireless private switched communication system and the wireless local area communication system to the wired local area communication system according to an embodiment of the present invention is as follows. In this case, it is assumed that the terminal has a function of using one or more wireless communication systems and a wired short-range communication system.

First, in a standby state (701), roaming support is started at the moment when the terminal, which is using a wireless communication system such as a public wireless communication system, a wireless private switched communication system, and a wireless local area communication system, is connected to the wired local area communication system (702). ).

Thereafter, the terminal changes the current care of address newly through an agent solicitation defined in the mobile Internet protocol (703) and disconnects from the wireless communication system that is being communicated with (704).

8 is a flowchart of a roaming process from a wired local area communication system to one of a public wireless communication system, a wireless private switched communication system, and a wireless local area communication system according to an embodiment of the present invention.

As shown in the figure, a roaming process of a wired local area communication system according to an embodiment of the present invention into one of the public wireless communication system, the wireless private switched communication system and the wireless local area communication system is as follows. In this case, it is assumed that the terminal has a function of using one or more wireless communication systems and a wired short-range communication system.

First, after performing data buffering at FA_OLD (801), the wireless communication system to be roamed is found and determined (802).

Thereafter, it is determined whether the home location register exists in the system to be roamed (803). If it does not exist, the terminal changes the current care of address through an agent solicitation (812), and terminates. The terminal registration information is registered (804), and the registration information of the terminal is transmitted from the base station controller to the router (806).

Next, after the router transmits a registration message to the home location register where the terminal is registered (806), the registration approval signal is transmitted to the visitor location register (807).

Then, after registering the registration information of the terminal in the visitor location register (808), after the FA_NEW and the registration information of the terminal from the FA_NEW to the home agent (809), the home address of the terminal of the FA_NEW to the care of the terminal Register with an address (810).

Next, the data buffered in FA_OLD is transmitted to FA_NEW (811).

As described in detail above, a routing device and a method for supporting roaming between a mobile Internet protocol and a communication system of the present invention provide a function of transmitting data of an IP layer while ensuring mobility of a terminal in a public wireless communication system and a wired / wireless local area communication system. It is possible to construct a communication system that supports efficient, inexpensive, and easy-to-maintain mobility by providing a network.In the case of a public wireless communication system and a wired / wireless short-range communication system employing the proposed router equipment, mutual roaming is convenient. It is effective to configure a mutual roaming public wireless communication system and a wired / wireless local area communication system supporting a multi-mode terminal.

In the above description, the technical concept of a routing device and a method for supporting roaming between a mobile Internet protocol and a communication system of the present invention has been described with the accompanying drawings, which are illustrative examples of the best embodiments of the present invention. It is not limited. In addition, it is obvious that any person skilled in the art can make various modifications and imitations without departing from the scope of the technical idea of the present invention.

Claims (14)

A mobile Internet protocol support block for roaming between the mobile internet protocol and the communication system, and an out-of-zone agent internet address of the visiting area of the terminal visiting the other area and the out-of-zone agent that stores the registration information of the terminal. A routing device having a home agent storing a as a care of address, the routing device comprising: A switching block connected to the internet protocol support block, the out-of-zone agent and the home agent, and configured to perform a function of exchanging data with an outside; A wireless communication protocol support block connected to the switching block to support a wireless communication protocol, and connected to the mobile internet protocol support block to support roaming between communication systems; A visitor location register connected to the wireless communication protocol support block to store registration information of a terminal visited from another area; And And a home location register connected to the wireless communication protocol support block to store information of a terminal under jurisdiction. A routing method supporting roaming between a mobile internet protocol and a communication system in a wired local area system, A first step of the terminal starting a wired connection to perform an agent discovery protocol in the terminal; A second step of detecting an out-of-zone agent and transmitting registration information of the terminal; The out-of-area agent transmits information of the registered terminal to a home agent registered with the terminal; And And a fourth step of registering, in the home agent, the internet address of the out-of-zone agent as the care of address of the terminal. The method of claim 2, A fifth step of transmitting, by the data transmission terminal, data to the Internet address of the mobile terminal; A sixth step of the home agent registered with the mobile terminal intercepting data transmitted to the Internet address of the mobile terminal; The home agent includes a seventh step of tunneling data to a registered care of address; And The out-of-zone agent further includes an eighth step of transmitting data to the mobile station after removing the tunneling header. A routing method for supporting roaming between a mobile Internet protocol and a communication system applied to a public wireless communication system, a wireless private switched communication system, and a wireless local area communication system, A first step of transmitting registration information of the terminal from the base station controller to the visitor location register as the terminal starts wireless data communication; A second step of transmitting a registration approval request message from the visitor location register to a registered home location register; Receiving a registration approval message from the home location register and registering registration information of the terminal with the visitor location register; And And a fourth step in which the out-of-zone agent transmits registration information of the terminal to the home agent and registers the out-of-zone agent internet address as the care of address of the terminal. The method of claim 4, wherein A fifth step of transmitting, by the data transmission terminal, data to the Internet address of the mobile terminal; A sixth step of the home agent registered with the mobile terminal intercepting data transmitted to the Internet address of the mobile terminal; The home agent includes a seventh step of tunneling data to a registered care of address; And The out-of-zone agent further includes an eighth step of transmitting data to the mobile station after removing the tunneling header. A routing method supporting roaming between a public wireless communication system, a mobile Internet protocol, and a communication system applied to a wireless private switching system and a wireless local area communication system, A first step of performing data buffering at an out-of-zone agent to which the terminal belongs as a handoff of a terminal starting data communication to base stations connected to different routers begins; A second step of transmitting registration information of the terminal from the base station controller to be handed off to the visitor location register; A third step of transmitting, from the visitor location register, a registration approval request message to the registered home location register of the terminal; Receiving a registration approval message from the home location register and deleting the location information of the terminal from the visitor location register to which the terminal belongs; Receiving a registration approval message from the home location register and registering registration information of the terminal with the visitor location register; A sixth step in which the out-of-zone agent transmits registration information of the terminal to the home agent and registers the out-of-zone agent internet address as the care of address of the terminal; And And a seventh step of transmitting data buffered at the out-of-zone agent to which the terminal belongs to the out-of-zone agent to be handed off. The method of claim 6, An eighth step of transmitting, by the data transmission terminal, data to the Internet address of the mobile terminal; A ninth step of the home agent registered with the mobile terminal intercepting data transmitted to the Internet address of the mobile terminal; The home agent may include tunneling data to a registered care-of address; And The out-of-zone agent further includes an eleventh step of transmitting data to the mobile station after removing the tunneling header. In a public wireless communication system supporting roaming mutually, and a routing method supporting roaming between mobile Internet protocols and communication systems applied to a wireless private switching system and a wireless local area communication system, The terminal is a first step of finding a radio signal capable of communication in another wireless communication system capable of communication; A second step of determining whether a home location register exists in a system to roam as service is available in a system to roam; A third step of disconnecting the connection with the system in communication after changing the care-of address through an agent solicitation in the terminal as a result of the determination in the second step; and And a fourth step of transmitting data after performing a new terminal registration if there is a result of the determination of the second step. The method of claim 8, The fourth step is A fifth step of the terminal starting a wired connection to perform an agent discovery protocol in the terminal; A sixth step of detecting an out-of-zone agent and transmitting registration information of the terminal; The out-of-zone agent is a seventh step of transmitting information of the registered terminal to a home agent registered with the terminal; And And an eighth step of registering the internet address of the out-of-zone agent as the care of address of the terminal in the home agent. The method of claim 9, A data transmitting terminal, ninth step of transmitting data to an internet address of the mobile terminal; A tenth step of the home agent registered with the mobile terminal intercepting data transmitted to the internet address of the mobile terminal; The eleventh step of tunneling data to a registered care-of address; And The out-of-zone agent further comprises a twelfth step of transmitting data to the mobile station after removing the tunneling header. A public wireless communication system supporting roaming with a wired local area system, and a routing method supporting roaming between mobile Internet protocols and communication systems applied to a wireless private exchange system and a wireless local area communication system, A first step of changing a care-of address through an agent solicitation in the terminal as the terminal is connected to a wired local area communication system; And And a second step of disconnecting the connection with the system in communication with the terminal. A routing method supporting roaming between a mobile Internet protocol and a communication system supporting roaming from a wired local area system to a public wireless communication system, a wireless private switching system, and a wireless local area communication system, A first step of performing data buffering in a communicating home agent; Finding a system to roam and determining whether a home location register exists in the system to roam; A third step of changing the care-of address through an agent solicitation if the terminal does not exist as a result of the determination of the second step; And And a fourth step of transmitting data after performing a new terminal registration if there is a result of the determination of the second step. The method of claim 12, The fourth step is A fifth step of transmitting registration information of the terminal from the base station controller to the visitor location register as the terminal starts wireless data communication; A sixth step of transmitting, from the visitor location register, a registration approval request message to the registered home location register of the terminal; A seventh step of receiving a registration approval message from the home location register and registering registration information of the terminal with the visitor location register; And And an eighth step of the out-of-zone agent transmitting registration information of the terminal to the home agent and registering the out-of-zone agent internet address as the care of address of the terminal. The method of claim 13, A data transmitting terminal, ninth step of transmitting data to an internet address of the mobile terminal; A tenth step of the home agent registered with the mobile terminal intercepting data transmitted to the internet address of the mobile terminal; The eleventh step of tunneling data to a registered care-of address; And The out-of-zone agent further comprises a twelfth step of transmitting data to the mobile station after removing the tunneling header.