KR20020041105A - Mobile termination method using DNS record update for changing IP address in wireless telecommunication network - Google Patents

Abstract

PURPOSE: An MS(Mobile Station) destination service method through mobile Internet protocol address registration in a wireless communication system is provided to enable an HA(Home Agent) to transmit a DNS update message instead of an MS in order to register an IP address change in case that the IP address of the MS is changed. CONSTITUTION: If an MS transmits an origination message to a BSC(201), the BSC sends a base station acknowledgement order to the MS(202). Afterwards, a traffic channel is formed between the MS and the BSC(203). If the BSC sends an R-P registration request message to a PDSN(204), the PDSN registers the number and session information of the MS and transmits an R-P registration reply message to a packet controller(205). Then the PDSN transmits an LCP(Link Control Protocol) configure request message to the MS(206), the MS sends an LCP configure nonacknowledgement message in case that the message is configured to use a challenge authentication protocol(207). In response to it, the PDSN sends an LCP configure request message not containing an authentication option to the MS, the MS sends an LCP configure acknowledgement message(208). Then, if the MS transmits an IPCP configure request message to the PDSN with an IP address option omitted(209), the PDSN transmits an IPCP configure acknowledgement message to the MS(210).

Description

Mobile termination method using DNS record update for changing IP address in wireless telecommunication network}

The present invention relates to a computer-readable recording medium recording a program for realizing the terminal terminating service method and the method using a mobile Internet Protocol address register is changed in a wireless communication system, in particular 3GPP2 (3 ^rd Generation Partnership Projects- 2) Dynamic Host Configuration Protocol (DHCP) and Domain Name System (DNS: Domain Name System) in wireless communication systems based on next generation mobile communication networks such as IMT-2000 (International Mobile Telecommunication) and UMTS (Universal Mobile Telecommunication Service) System) A method of integrating a Home Agent (HA) and a DHCP / DNS server so that a Mobile Internet Protocol (IP) terminal can receive an incoming service by using an Update message. .

Conventionally, when a terminal registers an IP address update with a DNS server in a situation where the terminal's IP address is frequently changed, a "Vendor Specific" method has been used. That is, until now, the update contents are registered directly in a web site using a web site, or a vendor specific protocol is used. Such frequent changes of IP addresses are the same in wireless as well as wired due to the lack of IPv4 addresses. However, it is inconvenient for the subscriber to directly update the IP address change of the terminal, and there is a problem that a time delay occurs.

However, when the terminal directly transmits a DNS update message, the message may be lost due to data loss in the wireless section. When the terminal terminates the current session and ends the use of the IP address, the DNS server must be notified. This procedure is performed by the DNS update requesting the deletion of the DNS information due to data loss in the wireless section or the discharging of the terminal battery. If the transmission is omitted, there was a problem that the DNS server may transmit incorrect information in response to the DNS lookup.

Therefore, there is a need for a method for allowing a mobile IP terminal to register an IP address change and receive an incoming service without updating the IP address change in a DNS server or a specific web site.

In order to solve the above problems, the present invention provides a home agent (HA) by using a home agent function of a mobile IP periodically re-registered when the terminal's IP address is changed in a wireless communication system. A computer-readable recording medium recording a terminal incoming service method for providing incoming service to a mobile IP terminal and a program for realizing the method by registering a change of IP address by sending a DNS update message on behalf of the terminal. The purpose is to provide.

1 is an exemplary configuration diagram of a wireless communication system to which the present invention is applied.

2 is a detailed flowchart illustrating a record registration process using a DHCP request message in a terminal incoming service method according to an embodiment of the present invention.

3 is a detailed flowchart illustrating a record deletion process using a DHCP request message in a terminal incoming service method according to an embodiment of the present invention.

4 is a detailed flowchart illustrating a record registration process using a DNS update message in a terminal incoming service method according to another embodiment of the present invention.

5 is a detailed flowchart illustrating a record deletion process using a DNS update message in a terminal incoming service method according to another embodiment of the present invention.

* Explanation of symbols for the main parts of the drawings

10: mobile terminal (MS)

20: base station (BTS) / base station controller (BSC) / packet controller (PCF)

30: exchanger (MSC)

40: Packet data service node (PDSN)

50: Remote Authentication Dial-in User Service (RADIUS) Server

60 home agent (HA)

70: Dynamic Host Configuration Protocol (DHCP) Server / Domain Name System (DNS) Server

One embodiment of the present invention for achieving the above object is, in a wireless communication system, a mobile terminal (MS) service in the terminal incoming service method by changing the mobile Internet Protocol (IP, "IP") address change, A first step of establishing a traffic channel between the mobile terminal (MS) and a radio access network (RAN) and establishing a point-to-point protocol (PPP) between the mobile terminal (MS) and a packet data service node (PDSN); In response to a mobile IP registration request from the mobile terminal MS, a home agent HA assigns an IP address and automatically assigns an IP address. (DHCP, hereinafter referred to as "DHCP") A second step of transmitting a DHCP request message to the server; And the DHCP server generates the DHCP request message as a domain name system (DNS, hereinafter referred to as "DNS") renewal (additional) message and transmits the message to a DNS server, thereby newly assigning an IP address and a hostname ( And a third step of registering Host_Name).

In addition, according to an embodiment of the present invention, the home agent (HA) transmits a DHCP release message to the DHCP server according to the request for deleting the mobile IP registration from the mobile terminal, and the DHCP server renews the DHCP release message to DNS. Generating a (delete) message and transmitting the same to the DNS server to delete the IP address and the host name Host_Name registered in the DNS server; And a fifth step of releasing a traffic channel established between the mobile terminal and the wireless access network.

Another embodiment of the present invention for achieving the above object is, in a wireless communication system, a mobile terminal (MS) service in the terminal incoming service method by changing the mobile Internet protocol (IP, "IP") address, A first step of establishing a traffic channel between the mobile terminal (MS) and a radio access network (RAN) and establishing a point-to-point protocol (PPP) between the mobile terminal (MS) and a packet data service node (PDSN); According to the mobile IP registration request from the mobile terminal MS, the home agent HA assigns an IP address and transmits a DNS update (additional) message to a domain name system (DNS, hereinafter referred to as "DNS") server. A second step of doing; And a third step of registering, by the DNS server, a newly allocated IP address and host name (Host_Name) in a DNS record based on the DNS update (addition) message.

In addition, according to another embodiment of the present invention, a home agent (HA) transmits a DNS update (delete) message to the DNS server according to a mobile IP registration deletion request from the mobile terminal, and the DNS server transmits the DNS. A fourth step of deleting an IP address and a host name (Host_Name) registered in the record; And a fifth step of releasing a traffic channel established between the mobile terminal and the wireless access network.

The recording medium according to an embodiment of the present invention for achieving the above object is, in a wireless communication system having a processor for a terminal incoming service through a mobile Internet Protocol (IP, address "IP") address change, For a mobile terminal (MS) incoming service, a traffic channel is established between the mobile terminal (MS) and a radio access network (RAN), and a point-to-point protocol (PPP) is established between the mobile terminal (MS) and a packet data service node (PDSN). A first function of setting); In response to a mobile IP registration request from the mobile terminal MS, a home agent HA assigns an IP address and automatically assigns an IP address. (DHCP, hereinafter referred to as "DHCP") A second function of sending a DHCP request message to the server; And the DHCP server generates the DHCP request message as a domain name system (DNS, hereinafter referred to as "DNS") renewal (additional) message and transmits the message to a DNS server, thereby newly assigning an IP address and a hostname ( A computer readable recording medium having recorded thereon a program for realizing the third function of registering Host_Name) is provided.

In addition, the recording medium according to an embodiment of the present invention, the home agent (HA) transmits a DHCP release message to the DHCP server according to the mobile IP registration deletion request from the mobile terminal, the DHCP server is the DHCP A fourth function of generating a release message as a DNS update (delete) message and transmitting the release message to the DNS server to delete an IP address and a host name (Host_Name) registered in the DNS server; And a computer-readable recording medium having recorded thereon a program for realizing a fifth function of releasing a traffic channel established between the mobile terminal and the wireless access network.

A recording medium according to another embodiment of the present invention for achieving the above object is, in a wireless communication system having a processor for a terminal incoming service through a mobile Internet Protocol (IP, address "IP") address change, For a mobile terminal (MS) incoming service, a traffic channel is established between the mobile terminal (MS) and a radio access network (RAN), and a point-to-point protocol (PPP) is established between the mobile terminal (MS) and a packet data service node (PDSN). A first function of setting); According to the mobile IP registration request from the mobile terminal MS, the home agent HA assigns an IP address and transmits a DNS update (additional) message to a domain name system (DNS, hereinafter referred to as "DNS") server. A second function of doing; And based on the DNS update (addition) message, the DNS server records a program for realizing a third function of registering a newly allocated IP address and host name (Host_Name) in a DNS record. To provide.

In addition, the recording medium according to another embodiment of the present invention, the home agent (HA) transmits a DNS update (delete) message to the DNS server in response to the mobile IP registration deletion request from the mobile terminal, the DNS A fourth function of deleting an IP address and a host name (Host_Name) registered in the DNS record from a server; And a computer-readable recording medium having recorded thereon a program for realizing a fifth function of releasing a traffic channel established between the mobile terminal and the wireless access network.

The present invention relates to a method of interworking a HA and a DHCP / DNS server so that a mobile IP terminal can receive an incoming service by using a DHCP and DNS update message. At this time, in the environment where HA and DHCP / DNS server are interworked, the user name (User_Name) is used as the host name (Host_Name), followed by the domain name (Domain_Name) after the user name (User_Name) and the FQDN (Fully) as "User_Name.Domain_Name". Create a Qualified Domain Name and send it to the DHCP / DNS server.

According to the present invention, a mobile IP terminal can register an IP address change and receive an incoming service without updating the IP address change in a DNS server or a specific web site. That is, if the terminal does not send a DNS update message by using the home agent (HA) function of the mobile IP that the terminal periodically re-registers, but the HA sends a DNS update message on behalf of the terminal, Use of the binding information of the terminal of the HA is reduced even when the load of the terminal is reduced and transmission of the DNS update message requesting deletion of the DNS information is omitted due to data loss in the wireless section or the battery of the terminal. When the time expires, HA sends a message to delete the information on DNS on behalf of the terminal, so if the DNS does not delete the existing information in the situation where the IP address is assigned to another terminal, unwanted data is lost. There is no possibility of transmission. In addition, according to the present invention, even if the IP address is changed frequently, data can be received by a request from the network such as a push service to the terminal, and services such as ftp can be directly performed between the terminals.

The above objects, features and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is an exemplary configuration diagram of a wireless communication system to which the present invention is applied. In the drawing, "10" denotes a mobile station (MS), and "20" denotes a base transceiver system (BTS) / base station controller (BSC). BTS System Controller / Packet Control Function (PCF), "30" is Mobile Switching Center (MSC), "40" is Packet Data Serving Node (PDSN), "50" is remote Remote Authentication Dial-In User Service (RADIUS) server, "60" is Home Agent (HA), and "70" is Dynamic Host Configuration Protocol (DHCP) server / Represents a Domain Name System (DNS) server, respectively.

The mobile terminal (MS) 10 may be used separately, such as a notebook, etc., or may be mixed, such as a wireless application protocol (WAP) terminal.

The mobile terminal (MS) 10 may use the same IP address at all times unless the wireless Internet connection is terminated unlike the conventional wireless Internet connection using the mobile IP protocol. That is, even if the mobile terminal (MS) 10 moves to another packet data service node (PDSN) 40, the home agent (HA) 60 always has the current PDSN information with the mobile terminal (MS) 10. To transmit data.

The base station (BTS) / base station controller (BSC) / packet controller (PCF) 20 is responsible for the function of data transmission and buffering between the mobile terminal (MS) 10 and the packet data service node (PDSN) 40, Paging is also performed when data is transmitted to a mobile terminal (MS) 10 in an IP network. Looking at each function in more detail as follows.

The base station controller (BSC) accepts the functions of the existing exchange (MSC) 30 as it is, and controls and manages one or more base stations (BTS), traffic and signaling related to call processing, mobility management, and mobile terminal (MS) 10 Perform management, etc.

Radio access network (RAN) is composed of a base station controller (BSC) and a base station (BTS), the visitor location register (VLR) and the home location register (HLR) linked to the exchange (MSC) 30 Mobility management and authentication of a mobile terminal (MS) 10 is provided through a Home Location Register.

When the basic authentication of the data call is completed, the radio access network (RAN) establishes a virtual connection for the packet data service node (PDSN) 40 and the Generic Routing Encapsulation (GRE) protocol.

A packet data service node (PDSN) 40 establishes a Point-to-Point Protocol (PPP) connection with a mobile terminal (MS) 10 and establishes a remote authentication dial-up user service (RADIUS) server (50). ) To transmit subscriber authentication and billing information.

In providing the mobile IP service, the packet data service node (PDSN) 40 performs a foreign agent (FA) function, and is a home agent (MS) that exists in the home network of the mobile station (MS) 10 IP address. HA) 60 performs functions such as location information management and tunnel setup for mobile IP.

At present, 3GPP2 network or ALL-IP network is evolving the whole into one IP network, and base station controller (BSC), packet controller (PCF) and packet data service node (PDSN) are connected to one wireless access gateway device ( WAG: Wireless Access Gateway.

Accordingly, the packet control function (PCF) may exist inside the base station controller (BSC) or may be implemented as a separate system. However, most developers implement the system as an independent system to provide effective mobility in the mobile network.

The packet control function (PCF) is called an "RP Interface" to connect the data of the mobile terminal (MS) 10 delivered from the radio access network (RAN) to the packet data service node (PDSN) 40. It uses the access method between the radio access network (RAN) and the IP network, and tunnels through the GRE protocol encapsulation and decapsulation of the user-specific virtual link connection and user data for data transmission in the RP connection. Provides (Tunneling) function. In addition, a buffer for allowing link layer packets to be transmitted to a mobile terminal (MS) 10 received from a packet data service node (PDSN) 40 to be transmitted over an air interface. ) And packet segmentation.

Packet data service node (PDSN) 40 processes packets received from packet controllers (PCFs). It is also an endpoint that performs PPP with a mobile terminal (MS) 10, and receives a subscriber's ID and password and authenticates it to a remote authentication dial-up user service (RADIUS) server (50).

The remote authentication dial-up user service (RADIUS) server 50 is responsible for AAA (Authentication, Authorization, Accounting) functions, i.e. subscriber authentication, authorization, billing, and the like, and is requested from the packet data service node (PDSN) 40. It handles authentication request and billing messages.

The home agent (HA) 60 allows the use of the IP address when a method of statically assigning an IP address is used after receiving a registration request message from the MS 10. In this case, when a method of dynamically allocating an IP address is used, an IP address is allocated and a registration reply message is transmitted to allow this. If the mobile terminal (MS) 10 changes the PDSN area, it is always informed to the home agent (HA) 60.

Dynamic Host Configuration Protocol (DHCP) server / Domain Name System (DNS) server 70 is a server that automatically assigns users without setting IP addresses, so users can easily use them without the concept of a network. It is used to set the network configuration environment such as IP address and domain name (Domain_Name).

The DNS server is used for the purpose of converting a host name (Host_Name) to an IP address or an IP address to a host name (Host_Name), and the like. The DNS server uses a DNS update message to assign a specific host name (Host_Name) to the host name. You can also update the IP address change for the server.

The present invention relates to a protocol between a home agent (HA) 60 and a domain name system (DNS) server 70. In a preferred embodiment of the present invention, an IP address of a mobile terminal (MS) 10 is changed. As a method for informing the name system (DNS) server 70 will be presented two methods.

In the present invention, a host name (Host_Name) is generated by adding a domain name (Domain_Name) in which the home agent (HA) 60 is set by an operator using a network access identifier (NAI) used by the mobile IP terminal for authentication. Done. That is, when the mobile terminal (MS) 10 transmits a Registration Request message to the home agent 60 and is assigned an IP address, the home agent 60 receives a domain name system ( DNS is informed to the server 70 and registered in the record. In addition, when the mobile terminal (MS) 10 terminates the use of the service, a registration in which a lifetime for using the IP address is set to 0 for the home agent (HA) 60 to return the IP address. It will send a Registration Request message. At this time, the home agent (HA) 60 notifies the domain name system (DNS) server 70 on behalf of the mobile terminal (MS) 10 to delete the record (Record).

In a preferred embodiment of the present invention, a first method for informing the domain name system (DNS) server 70 that the IP address of the mobile terminal (MS) 10 has been changed is a domain name system (DNS) server 70. When the dynamic host configuration protocol (DHCP) server 70 is interlocked, and the home agent (HA) 60 sends a DHCP request message, the dynamic host configuration protocol (DHCP) server 70 is the domain name system (DNS). The DNS update (Add) message is sent to the server 70. This is a method that can be applied when the domain name system (DNS) server 70 and the dynamic host configuration protocol (DHCP) server 70 are interworked and implemented in one physical server.

Therefore, when the home agent (HA) 60 assigns an IP address as shown in FIG. 2, the mobile agent (MS) 10 sends a DHCP request message to the dynamic host configuration protocol (DHCP) server 70. ) Will register the host name (Host_Name) and the newly assigned IP address. In this case, the host name (Host_Name) uses a method in which the domain name (Domain_Name) set in the home agent (HA) 60 is added to the user name (User_Name) used by the mobile terminal (MS) 10 for connection. For example, if you use the user name "foobar" (User_Name) and the domain name (Domain) is registered as "cdma2000.n-top.com" in the home agent (HA) 60, then "foobar.cdma2000.n -top.com "is the host name (Host_Name).

On the other hand, when returning an IP address or the call is terminated, the home agent (HA) 60 sends a DHCP request message as shown in FIG. 3 to record a record of the domain name system (DNS) server 70. Delete it.

In a preferred embodiment of the present invention, the second method for notifying the domain name system (DNS) server 70 that the IP address of the mobile terminal (MS) 10 has changed is that the home agent (HA) 60 directly domains. The DNS update message is transmitted to the name system (DNS) server 70. This is simpler to implement since there is no interworking with the Dynamic Host Configuration Protocol (DHCP) server 70. Therefore, as shown in FIG. 4, the home agent 60 directly sends a DNS Update message to the domain name system (DNS) server 70 to generate a new DNS record, and as shown in FIG. 5 at the end of the call. The home agent (HA) 60 directly sends a DNS Update message to the domain name system (DNS) server 70 to delete the corresponding DNS record (Record).

2 is a detailed flowchart illustrating a record registration process using a DHCP request message in a terminal incoming service method according to an embodiment of the present invention.

As shown in FIG. 2, the record registration process using the DHCP request message in the terminal incoming service method according to an embodiment of the present invention, first, the MS 10 transmits an origination message. In step 201, the base station controller 20 transmits a base station acknowledgment command (Base Station Ack Order) from the base station controller (BSC) 20 to the mobile terminal (MS) 10.

Thereafter, a traffic channel is established between the mobile terminal (MS) 10 and the base station controller (BSC) 20 (203), and the base station controller (BSC) 20 registers as a packet data service node (PDSN) 40. When the RP Registration Request message is sent (204), the packet data service node (PDSN) 40 registers the number and session information of the MS 10, and then sends an RP Registration Reply message. Send to packet controller (PCF) 20 (205).

Next, a PPP setting is made between the mobile terminal (MS) 10 and the packet data service node (PDSN) 40 (206 to 210).

More specifically, if the packet data service node (PDSN) 40 transmits a link control protocol setup request (LCP Configure Request) message to the mobile station (MS) 10 (206), the CHAP (CHallenge) If the authentication protocol is set to use, the mobile terminal (MS) 10 sends a link control protocol setup unacknowledgement (LCP Configure Noacknowledgement) message to the packet data service node (PDSN) 40 (207). When the packet data service node (PDSN) 40 sends a link control protocol request (LCP Configure Request) message missing an authentication option, the mobile terminal (MS) 10 responds to the link control protocol setting response ( LCP Configure Acknowledgement) message is sent (208).

Next, if the MS 10 sends an IPCP Configure Request message to the packet data service node (PDSN) 40 without omitting the IP address option (209), The packet data service node (PDSN) 40 transmits an IPCP Configure Acknowledgement message to the MS 10 (210).

When all of the PPP settings are completed, the MS 10 may first selectively send an Agent Solicitation message to the packet data service node (PDSN) 40 (211). The agent request message at this time is a message used when requesting the packet data service node (PDSN) 40 to send an agent advertisement message.

Alternatively, if the packet data service node (PDSN) 40 first sends an Agent Advertisement message to the MS 10 (212), the packet data service node (PDSN) 40 included therein The MS 10 sends a Mobile IP Registration Request message to the packet data service node (PDSN) 40 by using the information of the MS 10 (213). At this time, the mobile IP registration request message includes a lifetime for using the IP address, an IP address of the packet data service node (PDSN) 40, and the like.

Subsequently, the packet data service node (PDSN) 40 having received the mobile IP registration request message transmits an access request message to the remote authentication dial-up user service (RADIUS) server 50 (214). Subsequently, the remote authentication dial-up user service (RADIUS) server 50 that receives the authentication request message includes a packet data service node (including the authorization verification information) in an access accept message that allows access after successful authentication. PDSN) 40 to transmit (215).

Thereafter, the packet data service node (PDSN) 40 having received the connection acceptance message from the remote authentication dial-up user service (RADIUS) server 50 receives the home agent (HA) 60 from the step 213. A mobile IP registration request message is sent (216). In contrast, when the home agent (HA) 60 receives the mobile IP registration request message from the packet data service node (PDSN) 40, the home agent (HA) 60 receives the IP address of the mobile terminal (MS) 10 and the packet data service node (PDSN). The IP address of the IP address 40 and the requested lifetime are registered, and a Mobile IP Registration Reply message is transmitted to the packet data service node (PDSN) 40 (217). Then, the packet data service node (PDSN) 40 receiving the mobile IP registration response message from the home agent (HA) 60 forwards it to the mobile terminal (MS) 10 (218).

On the other hand, the home agent (HA) 60 transmits a DHCP request message to the dynamic host configuration protocol (DHCP) server 70 (219). At this time, the DHCP request message includes a home agent (HA) 60 having a domain in the IP address assigned to the mobile terminal (MS) 10 and the user name (User_Name) inputted by the mobile terminal (MS) 10 for authentication. The host name (Host_Name) of "User_Name.Domain_Name (for example, buzzi.sktelecom.com)" created by adding the name (Domain_Name) is included.

Subsequently, when the DHCP server 70 receives the DHCP request message, the dynamic host configuration protocol (DHCP) server 70 regenerates the DHCP request message as a DNS update message and sends it to the domain name system (DNS) server 70 (220). Then, the Domain Name System (DNS) server 70 generates an A RR (Resource Record) and a PTR RR (Pointer Resource Record) for registering an IP address for the corresponding host name (Host_Name), and then performs a dynamic host configuration protocol (DHCP). In step 221, a DNS Update Reply message is sent to the server 70. Subsequently, the dynamic host configuration protocol (DHCP) server 70 notifies the home agent (HA) 60 of this via a DHCP acknowledgment message (222).

3 is a detailed flowchart illustrating a record deletion process using a DHCP request message in a terminal incoming service method according to an embodiment of the present invention.

As shown in FIG. 3, a record deletion process using a DHCP request message in a terminal incoming service method according to an embodiment of the present invention, first, the mobile terminal (MS) 10 releases registration of a mobile IP. Request (lifetime = 0)) message is sent to the home agent (HA) 60 via the packet data service node (PDSN) 40 (301), the home agent (HA) 60 has already been created. (MS) deletes information including the IP address of the packet data service node (PDSN) 40, the requested lifetime, and via the packet data service node (PDSN) 40 The mobile station (MS) 10 sends a registration reply (lifetime = 0, Accept) message to the mobile IP deregistration (302). In addition, the home agent (HA) 60 notifies the dynamic host configuration protocol (DHCP) server 70 of the termination of the IP address assigned to the mobile terminal (MS) 10 through a DHCP release message. (303).

Thereafter, the Dynamic Host Configuration Protocol (DHCP) server 70 sends a DNS Update (Delete) message to the Domain Name System (DNS) server 70 requesting the deletion of the DNS record (304). The DNS server 70 deletes the DNS record for the corresponding host name Host_Name and sends a DNS Update Acknowledgement message to the dynamic host configuration protocol server 70 (305).

Next, the packet data service node (PDSN) 40 receives the mobile IP deregistration message from the home agent (HA) 60 and forwards it to the mobile terminal (MS) 10, and then the packet controller (PCF) ( In step 306, an RP Registration Update message is transmitted (step 306). Then, the packet controller (PCF) 20 sends an R-P Registration Acknowledgment message, which is a response message thereto, to the packet data service node (PDSN) 40 (307). When the RP Registration Request (lifetime = 0, Accounting Data) message is transmitted to the packet data service node (PDSN) 40 to delete the current session information (308), the packet data service node ( The PDSN 40 deletes the session information for the MS 10 and then sends an RP Registration Reply (lifetime = 0, Accept) message in response thereto (309). .

Subsequently, the packet controller (PCF) 20 transmits a clear request message to the exchange (MSC) 30 (310), and the exchange (MSC) 30 sends a clear command message thereto. After sending (311), the traffic channel between the mobile terminal (MS) 10 and the base station controller (BSC) 20 is released (312), the packet controller (PCF) 20 to the exchange (MSC) 30 The clear complete message is transmitted (313).

4 is a detailed flowchart illustrating a record registration process using a DNS update message in a terminal incoming service method according to another embodiment of the present invention.

As shown in FIG. 4, in the record registration process using the DNS update message in the terminal incoming service method according to another embodiment of the present invention, the MS 10 first transmits an origination message. In step 401, the BS transmits a base station acknowledgment command (Base Station Ack Order) from the base station controller (BSC) 20 to the mobile terminal (MS) 10 (402).

Thereafter, a traffic channel is established between the mobile terminal (MS) 10 and the base station controller (BSC) 20 (403), and the base station controller (BSC) 20 registers as a packet data service node (PDSN) 40. When a RP Registration Request message is sent (404), the packet data service node (PDSN) 40 registers the number and session information of the MS 10, and then sends a RP Registration Reply message. Transmit to packet controller (PCF) 20 (405).

Next, a PPP setting is made between the mobile terminal (MS) 10 and the packet data service node (PDSN) 40 (406 to 410).

More specifically, if the packet data service node (PDSN) 40 transmits a link control protocol setup request (LCP Configure Request) message to the mobile terminal (MS) 10 (406), here CHAP (CHallenge) If a mobile device (MS) 10 is set to use an Authentication Protocol, the mobile terminal (MS) 10 sends (407) a LCP Configure Noacknowledgement message to the packet data service node (PDSN) 40, and When the packet data service node (PDSN) 40 sends a link control protocol request (LCP Configure Request) message missing an authentication option, the mobile terminal (MS) 10 responds to the link control protocol setting response ( LCP Configure Acknowledgement) message is sent (408).

Next, when the MS 10 transmits an IPCP Configure Request message to the packet data service node (PDSN) 40 without omitting the IP address option (409). The packet data service node (PDSN) 40 transmits an IPCP Configure Acknowledgement message to the MS 10 (410).

When all the PPP settings are completed, the MS 10 may first selectively send an Agent Solicitation message to the packet data service node (PDSN) 40 (411). The agent request message at this time is a message used when requesting the packet data service node (PDSN) 40 to send an agent advertisement message.

Alternatively, if the packet data service node (PDSN) 40 first sends an Agent Advertisement message to the MS 10 (412), the packet data service node (PDSN) 40 included therein is included. The MS 10 sends a Mobile IP Registration Request message to the packet data service node (PDSN) 40 by using the information of the UE 10 (413). At this time, the mobile IP registration request message includes a lifetime for using the IP address, an IP address of the packet data service node (PDSN) 40, and the like.

Subsequently, the packet data service node (PDSN) 40 having received the mobile IP registration request message transmits an access request message to the remote authentication dial-up user service (RADIUS) server 50 (414). Subsequently, the remote authentication dial-up user service (RADIUS) server 50 receiving the authentication request message includes a packet data service node (including the authorization verification information) in an access accept message that allows access after successful authentication. PDSN) 40 to transmit (415).

Thereafter, the packet data service node (PDSN) 40 having received the connection acceptance message from the remote authentication dial-up user service (RADIUS) server 50 receives the home agent (HA) 60 from the "413" step. A mobile IP registration request message is sent (416). In contrast, when the home agent (HA) 60 receives the mobile IP registration request message from the packet data service node (PDSN) 40, the home agent (HA) 60 receives the IP address of the mobile terminal (MS) 10 and the packet data service node (PDSN). IP address 40 and the requested lifetime are registered and a Mobile IP Registration Reply message is sent to the packet data service node (PDSN) 40 (417). Then, the packet data service node (PDSN) 40 receiving the mobile IP registration response message from the home agent (HA) 60 forwards it to the mobile terminal (MS) 10 (418).

Meanwhile, the home agent (HA) 60 transmits a DNS update message to the domain name system (DNS) server 70 (419). At this time, in the DNS update message, the home agent (HA) 60 domains the IP address assigned to the mobile terminal (MS) 10 and the user name (User_Name) inputted by the mobile terminal (MS) 10 for authentication. The host name (Host_Name) of "User_Name.Domain_Name (for example, buzzi.sktelecom.com)" generated by adding the name (Domain_Name) is included.

Subsequently, the domain name system (DNS) server 70 generates an A RR (Resource Record) and a PTR RR (Pointer Resource Record) for registering an IP address for the corresponding host name (Host_Name), and then the home agent (HA) ( In step 60, a DNS update reply message is sent (420).

5 is a detailed flowchart illustrating a record deletion process using a DNS update message in a terminal incoming service method according to another embodiment of the present invention.

As shown in FIG. 5, in a record deletion process using a DNS update message in a terminal incoming service method according to another embodiment of the present invention, first, a mobile terminal (MS) 10 releases registration of a mobile IP. Request (lifetime = 0)) message is sent to the home agent (HA) 60 via the packet data service node (PDSN) 40 (501), the home agent (HA) 60 has already been created. (MS) deletes information including the IP address of the packet data service node (PDSN) 40, the requested lifetime, and via the packet data service node (PDSN) 40 The mobile station (MS) 10 sends a registration reply (lifetime = 0, Accept) message to the mobile IP deregistration (502). In addition, the home agent (HA) 60 sends a DNS Update (Delete) message requesting the deletion of the DNS record to the Domain Name System (DNS) server 70 (503), and the Domain Name System (DNS) server In operation 70, the DNS record for the host name Host_Name is deleted and then a DNS update response message is sent to the home agent 60 (504).

Next, the packet data service node (PDSN) 40 receives the mobile IP deregistration message from the home agent (HA) 60 and forwards it to the mobile terminal (MS) 10, and then the packet controller (PCF) ( In step 505, the RP registration update message is transmitted. The packet controller (PCF) 20 then sends 506 an R-P Registration Acknowledgment message that is a response message to the packet data service node (PDSN) 40. When the RP Registration Request (lifetime = 0, Accounting Data) message is transmitted to the packet data service node (PDSN) 40 to delete the current session information (507), the packet data service node ( The PDSN 40 deletes the session information for the MS 10 and then sends an RP Registration Reply (lifetime = 0, Accept) message as a response message (508). .

Subsequently, the packet controller (PCF) 20 transmits a clear request message to the exchange (MSC) 30 (509), and the exchange (MSC) 30 sends a clear command message thereto. After sending (510), the traffic channel between the mobile terminal (MS) 10 and the base station controller (BSC) 20 is released (511), the packet controller (PCF) 20 to the switch (MSC) 30 A clear complete message is transmitted (512).

The method of the present invention as described above may be implemented as a program and stored in a computer-readable recording medium (CD-ROM, RAM, ROM, floppy disk, hard disk, magneto-optical disk, etc.).

The present invention described above is capable of various substitutions, modifications, and changes without departing from the spirit of the present invention for those skilled in the art to which the present invention pertains. It is not limited to the drawings.

As described above, the present invention enables a mobile IP terminal to register an IP address change to receive an incoming service without updating the IP address change in a DNS server or a specific web site, thereby reducing the load on the terminal, Is not assigned to the other terminal when DNS is not deleted, there is no possibility of undesired data transmission, and even if the IP address is changed frequently, the network requests such as push service to the terminal. It is possible to receive data and to directly enable services such as ftp between terminals.

Claims (21)

In the terminal communication service method by changing the mobile Internet protocol (IP) address in a wireless communication system, For a mobile terminal (MS) incoming service, a traffic channel is established between the mobile terminal (MS) and a radio access network (RAN), and a point-to-point protocol (PPP) is established between the mobile terminal (MS) and a packet data service node (PDSN). Setting a second step; In response to a mobile IP registration request from the mobile terminal MS, a home agent HA assigns an IP address and automatically assigns an IP address. (DHCP, hereinafter referred to as "DHCP") A second step of transmitting a DHCP request message to the server; And The DHCP server generates the DHCP request message as a domain name system (DNS, hereinafter referred to as "DNS") renewal (additional) message and transmits the message to a DNS server, thereby newly assigning an IP address and a host name (Host_Name) to the DNS server. 3rd step to register) Terminal incoming service method through the registration of the changed mobile Internet protocol address in a wireless communication system comprising a. The method of claim 1, In response to the mobile IP registration deletion request from the mobile terminal, a home agent (HA) transmits a DHCP release message to the DHCP server, and the DHCP server generates the DHCP release message as a DNS update (delete) message to generate the DNS. Transmitting to a server to delete the IP address and host name (Host_Name) registered in the DNS server; And A fifth step of releasing a traffic channel established between the mobile terminal and the wireless access network; Terminal incoming service method through the registration of the changed mobile Internet protocol address in the wireless communication system further comprising. The method of claim 1, The DHCP request message, Substantially, the home agent includes a host name (Host_Name) generated by the home agent by adding a domain name (Domain_Name) to the IP address assigned to the mobile terminal and the user name (User_Name) inputted by the mobile terminal for authentication. Method of receiving terminal service through registration of changed mobile internet protocol address in wireless communication system. The method of claim 1, Mobile IP registration request message from the mobile terminal, Substantially, the terminal incoming service method through registration of a modified mobile Internet protocol address in a wireless communication system, characterized in that it comprises a lifetime to use an IP address and the IP address of the packet data service node (PDSN). . The method of claim 2, The fourth step, A sixth step of the mobile terminal transmitting a mobile IP deregistration message to the home agent (HA) via the packet data service node (PDSN); The home agent HA deletes the information including the IP address of the mobile terminal MS, the IP address of the packet data service node PDSN, and the requested lifetime. A seventh step of transmitting a response message to the mobile IP deregistration to the mobile terminal (MS) via a node (PDSN); An eighth step of the home agent (HA) notifying the DHCP server of the end of the use of the IP address assigned to the mobile station (MS) through a DHCP release message; A ninth step of transmitting, by the DHCP server, a DNS update (delete) message requesting deletion of a DNS record from the DNS server; And A tenth step in which the DNS server deletes the DNS record for the host name Host_Name and transmits a DNS update response message to the DHCP server; Terminal incoming service method through the registration of the changed mobile Internet protocol address in a wireless communication system comprising a. The method of claim 5, The fifth step, An eleventh step of receiving, by the packet data service node PDSN, a mobile IP deregistration message from the home agent HA, and transmitting it to the mobile terminal MS, and then transmitting a registration update message to a packet controller PCF. ; A twelveth step in which the packet controller (PCF) transmits a registration response message to the packet data service node (PDSN) and transmits a registration deletion request message to the packet data service node (PDSN) requesting deletion of current session information; ; A thirteenth step, after the packet data service node (PDSN) deletes the session information for the mobile terminal (MS), and transmits a registration deletion response message, which is a response message thereto, to the packet controller (PCF); And When the packet controller PCF sends a release request message to the exchange MSC, after the exchange MSC sends an acknowledgment message, the traffic channel is released between the MS and the base station controller BSC. And the packet controller PCF sends a release complete message to the exchange MSC. Terminal incoming service method through the registration of the changed mobile Internet protocol address in a wireless communication system comprising a. The method according to any one of claims 1 to 6, The first step is, A fifteenth step of transmitting a base station identification command from the base station controller (BSC) to the mobile terminal (MS) when the mobile terminal (MS) transmits an outgoing message to the base station controller (BSC); A sixteenth step of establishing a traffic channel between the mobile terminal (MS) and the base station controller (BSC), wherein the base station controller (BSC) transmits a registration request message to the packet data service node (PDSN); A seventeenth step of the packet data service node (PDSN) registering the number and session information of the mobile terminal (MS) and transmitting a registration response message to the packet controller (PCF); When the packet data service node PDSN transmits a link control protocol setting request message to the mobile terminal MS, the mobile terminal MS transmits a link control protocol setting unacknowledged message to the packet data service node PDSN. In response, when the packet data service node PDSN transmits a link control protocol request message missing an authentication option, the mobile station MS transmits a link control protocol setting response message in response thereto. ; And When the MS transmits an IP setup protocol setup request message to the packet data service node PDSN without omitting an IP address option, the packet data service node PDSN sends an IP setup protocol setup response message. 19th step of transmitting a message to the mobile terminal (MS) Terminal incoming service method through the registration of the changed mobile Internet protocol address in a wireless communication system comprising a. The method of claim 7, wherein The second step, A twenty step of selectively transmitting an agent request message to the packet data service node (PDSN) when all of the point-to-point protocol (PPP) settings are completed; When the packet data service node PDSN transmits an agent advertisement message to the mobile terminal MS, the mobile terminal MS registers a mobile IP by using information of the packet data service node PDSN included therein. A twenty-first step of sending a request message to the packet data service node (PDSN); A twenty-second step of receiving, by the packet data service node (PDSN) receiving the mobile IP registration request message, a remote request dialing user service (RADIUS) server; A twenty-third step of receiving, by the remote authentication dial-up user service (RADIUS) server, receiving the authentication request message, including the authentication verification information in the access acceptance message allowing the access after authentication success to the packet data service node (PDSN); ; A twenty-fourth step of transmitting, by the packet data service node (PDSN) receiving the connection acceptance message from the remote authentication dial-up user service (RADIUS) server, the received mobile IP registration request message to the home agent (HA); When the home agent (HA) receives a mobile IP registration request message from the packet data service node (PDSN), the IP address of the mobile terminal, the IP address of the packet data service node (PDSN), and the requested usage time ( registering a lifetime, and transmitting a mobile IP registration response message to the packet data service node (PDSN); A twenty sixth step of receiving, by the home agent (HA), a packet data service node (PDSN) that has received a mobile IP registration response message to the mobile terminal (MS); And Step 27, the home agent HA sends a DHCP request message to the DHCP server; Terminal incoming service method through the registration of the changed mobile Internet protocol address in a wireless communication system comprising a. The method of claim 8, The third step, Step 28, when the DHCP server receives the DHCP request message, regenerates it as a DNS update message and transmits it to the DNS server; And After the DNS server generates a record for registering an IP address for the host name (Host_Name) and sends a DNS update response message to the DHCP server, the DHCP server sends a DHCP response message to the home agent (HA). Informing the 29th Step Terminal incoming service method through the registration of the changed mobile Internet protocol address in a wireless communication system comprising a. In the terminal communication service method by changing the mobile Internet protocol (IP) address in a wireless communication system, For a mobile terminal (MS) incoming service, a traffic channel is established between the mobile terminal (MS) and a radio access network (RAN), and a point-to-point protocol (PPP) is established between the mobile terminal (MS) and a packet data service node (PDSN). Setting a second step; According to the mobile IP registration request from the mobile terminal MS, the home agent HA assigns an IP address and transmits a DNS update (additional) message to a domain name system (DNS, hereinafter referred to as "DNS") server. A second step of doing; And Based on the DNS update (addition) message, the DNS server registers a newly allocated IP address and host name (Host_Name) in a DNS record; Terminal incoming service method through the registration of the changed mobile Internet protocol address in a wireless communication system comprising a. The method of claim 10, In response to a mobile IP registration deletion request from the mobile terminal, a home agent (HA) transmits a DNS update (delete) message to the DNS server, so that the IP address and hostname (registered in the DNS record in the DNS server) A fourth step of deleting Host_Name); And A fifth step of releasing a traffic channel established between the mobile terminal and the wireless access network; Terminal incoming service method through the registration of the changed mobile Internet protocol address in the wireless communication system further comprising. The method of claim 10, The DNS update (additional) message is Substantially, the home agent includes a host name (Host_Name) generated by the home agent by adding a domain name (Domain_Name) to the IP address assigned to the mobile terminal and the user name (User_Name) inputted by the mobile terminal for authentication. Method of receiving terminal service through registration of changed mobile internet protocol address in wireless communication system. The method of claim 10, Mobile IP registration request message from the mobile terminal, Substantially, the terminal incoming service method through registration of a modified mobile Internet protocol address in a wireless communication system, characterized in that it comprises a lifetime to use an IP address and the IP address of the packet data service node (PDSN). . The method of claim 11, The fourth step, When the mobile terminal MS transmits a mobile IP deregistration message to the home agent HA via the packet data service node PDSN, the home agent HA has already been generated. Delete the information including the IP address of the packet data service node (PDSN), the requested IP address of the packet data service node (PDSN), and the requested lifetime and move to the mobile terminal (MS) via the packet data service node (PDSN). Transmitting a response message for the release; And When the home agent (HA) transmits a DNS update message requesting the deletion of the DNS record to the DNS server, the home agent (HA) after deleting the DNS record for the host name (Host_Name). 7th step of sending a DNS update response message Terminal incoming service method through the registration of the changed mobile Internet protocol address in a wireless communication system comprising a. The method of claim 14, The fifth step, An eighth step of receiving, by the packet data service node PDSN, a mobile IP deregistration message from the home agent HA and transmitting it to the mobile terminal MS, and then transmitting a registration update message to a packet controller PCF; ; A ninth step in which the packet controller (PCF) transmits a registration response message to the packet data service node (PDSN) and transmits a registration deletion request message to the packet data service node (PDSN) requesting deletion of current session information; ; A tenth step of, after the packet data service node (PDSN) deletes session information for the mobile terminal (MS), and transmits a registration deletion response message, which is a response message thereto, to the packet controller (PCF); And When the packet controller (PCF) sends a release request message to the exchange (MSC), after the exchange (MSC) sends a confirmation message for this, the traffic channel between the MS and the base station controller (BSC) is released And the packet controller PCF sends a release complete message to the exchange MSC. Terminal incoming service method through the registration of the changed mobile Internet protocol address in a wireless communication system comprising a. The method according to any one of claims 10 to 15, The first step is, A twelfth step of transmitting a base station identification command from the base station controller (BSC) to the mobile terminal (MS) when the mobile terminal (MS) transmits an outgoing message to the base station controller (BSC); A thirteenth step of establishing a traffic channel between the mobile terminal (MS) and the base station controller (BSC), wherein the base station controller (BSC) transmits a registration request message to the packet data service node (PDSN); A fourteenth step of the packet data service node (PDSN) registering the number and session information of the mobile terminal (MS) and transmitting a registration response message to the packet controller (PCF); When the packet data service node PDSN transmits a link control protocol setting request message to the mobile terminal MS, the mobile terminal MS transmits a link control protocol setting unacknowledged message to the packet data service node PDSN. In response thereto, when the packet data service node PDSN transmits a link control protocol request message missing an authentication option, the mobile terminal MS transmits a link control protocol setting response message in response thereto. ; And When the MS transmits an IP setup protocol setup request message to the packet data service node PDSN without omitting an IP address option, the packet data service node PDSN sends an IP setup protocol setup response message. 16th step of transmitting a message to the mobile terminal MS Terminal incoming service method through the registration of the changed mobile Internet protocol address in a wireless communication system comprising a. The method of claim 16, The second step, A 17th step of selectively transmitting an agent request message to the packet data service node (PDSN) when the point-to-point protocol (PPP) configuration is completed; When the packet data service node PDSN transmits an agent advertisement message to the mobile terminal MS, the mobile terminal MS registers a mobile IP by using information of the packet data service node PDSN included therein. An eighteenth step of sending a request message to the packet data service node (PDSN); The packet data service node (PDSN) receiving the mobile IP registration request message sends a connection request message to a remote authentication dial-up user service (RADIUS) server; A 20th step of receiving, by the remote authentication dial-up user service (RADIUS) server which receives the authentication request message, the authentication request message and transmitting the authentication request message to the packet data service node (PDSN) including the authorization verification-related content in the access acceptance message allowing the access after the authentication succeeds; ; A twenty-first step of the packet data service node (PDSN) receiving a connection acceptance message from the remote authentication dial-up user service (RADIUS) server transmitting a received mobile IP registration request message to the home agent (HA); When the home agent (HA) receives a mobile IP registration request message from the packet data service node (PDSN), the IP address of the mobile terminal, the IP address of the packet data service node (PDSN), and the requested usage time ( registering a lifetime and transmitting a mobile IP registration response message to the packet data service node (PDSN); A twenty-third step of receiving, by the home agent (HA), a packet data service node (PDSN) that has received a mobile IP registration response message to the mobile terminal (MS); And A twenty-fourth step in which the home agent HA sends a DNS update message to the DNS server; Terminal incoming service method through the registration of the changed mobile Internet protocol address in a wireless communication system comprising a. In a wireless communication system having a processor for a terminal incoming service through a mobile internet protocol (IP) address change, For a mobile terminal (MS) incoming service, a traffic channel is established between the mobile terminal (MS) and a radio access network (RAN), and a point-to-point protocol (PPP) is established between the mobile terminal (MS) and a packet data service node (PDSN). A first function of setting); In response to a mobile IP registration request from the mobile terminal MS, a home agent HA assigns an IP address and automatically assigns an IP address. (DHCP, hereinafter referred to as "DHCP") A second function of sending a DHCP request message to the server; And The DHCP server generates the DHCP request message as a domain name system (DNS, hereinafter referred to as "DNS") renewal (additional) message and transmits the message to a DNS server, thereby newly assigning an IP address and a host name (Host_Name) to the DNS server. 3rd function to register) A computer-readable recording medium having recorded thereon a program for realizing this. The method of claim 18, In response to the mobile IP registration deletion request from the mobile terminal, a home agent (HA) transmits a DHCP release message to the DHCP server, and the DHCP server generates the DHCP release message as a DNS update (delete) message to generate the DNS. Transmitting to a server to delete the IP address and host name (Host_Name) registered in the DNS server; And A fifth function of releasing a traffic channel established between the mobile terminal and the wireless access network; A computer-readable recording medium that records a program for further realization. In a wireless communication system having a processor for a terminal incoming service through a mobile internet protocol (IP) address change, For a mobile terminal (MS) incoming service, a traffic channel is established between the mobile terminal (MS) and a radio access network (RAN), and a point-to-point protocol (PPP) is established between the mobile terminal (MS) and a packet data service node (PDSN). A first function of setting); According to the mobile IP registration request from the mobile terminal MS, the home agent HA assigns an IP address and transmits a DNS update (additional) message to a domain name system (DNS, hereinafter referred to as "DNS") server. A second function of doing; And Based on the DNS update (addition) message, the DNS server registers a newly allocated IP address and host name (Host_Name) in a DNS record; A computer-readable recording medium having recorded thereon a program for realizing this. The method of claim 20, In response to a mobile IP registration deletion request from the mobile terminal, a home agent (HA) transmits a DNS update (delete) message to the DNS server, so that the IP address and hostname (registered in the DNS record in the DNS server) A fourth function of deleting Host_Name); And A fifth function of releasing a traffic channel established between the mobile terminal and the wireless access network; A computer-readable recording medium that records a program for further realization.