• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The present invention relates to a method for transmitting data to a mobile communication terminal in a virtual private network (VPN). When the router detects that data to be transmitted from a server of the virtual private network to a specific mobile terminal occurs, Requesting the visitor node manager address to which the specific mobile communication terminal belongs to the Internet service provider router connected to the virtual private network, and the Internet service provider router detects the visitor node manager address search request. The visitor node manager address to which the visitor node manager belongs to is searched through the home node manager, and the Internet service provider router which searches the visitor node manager address to which the specific mobile communication terminal belongs through the home node manager is the searched visitor. By routing the data to the visitor node manager corresponding to the address manager address, the visitor node manager to which the data is routed retrieves the location of the specific mobile communication terminal and transmits the data to transmit data from the server to the mobile communication terminal. Makes it possible to do
    公开号:KR20030004135A
    申请号:KR1020020038272
    申请日:2002-07-03
    公开日:2003-01-14
    发明作者:정태성
    申请人:삼성전자 주식회사；
    IPC主号:
    专利说明:

    METHOD FOR TRANSFERRING DATA FORM A SERVER OF VIRTUAL PRIVATE NETWORK TO MOBILE NODE}
    [9] The present invention relates to a data transmission method of a virtual private network (VPN), and more particularly, to a method of transmitting data to a mobile communication terminal in a virtual private router network (VPRN).
    [10] In general, a mobile node (MN) has mobility and is used for voice call or data communication while the user of the mobile terminal is guaranteed mobility. Since the mobile communication terminal is not restricted by its location because of its mobility, many users are currently receiving data services such as Internet communication while moving. In addition, active development of methods and systems for providing a more smooth mobile service is being made. In order to secure mobility in the mobile communication terminal and receive stable data service, a fixed IP address must be assigned to the mobile communication terminal. As such, many studies have been conducted to assign permanent IP (Mobile IP) addresses to mobile terminals.
    [11] 1 is a diagram illustrating a schematic configuration of a mobile IP network for allocating a mobile IP to a mobile communication terminal. Hereinafter, a process of configuring a network and registering a location for allocating a mobile IP to a mobile communication terminal will be described with reference to FIG. 1. A mobile node (MN) 10 generally transmits a location registration signal to a base station when power is applied and during initialization or when location registration is required. However, since the mobile communication terminal 10 has mobility as described above, the mobile communication terminal 10 is a mobile communication terminal registered with a service company in Korea, for example, a region other than the region where its service is registered. Assuming, it is possible to transmit a signal for location registration in the United States. In this case, location registration is possible when a predetermined service agreement between mobile communication providers is set. The location registration process will be described with reference to FIG. 1.
    [12] The mobile communication terminal 10 wirelessly transmits a registration request signal (Registration Request) to the FA (Foreign Agent: Visitor Node Manager) 20 which is a base station. Then, the visitor node manager 20 transmits a location registration request signal including the location information of the visitor node manager 20 included in the location registration request signal of the mobile communication terminal 10 to the mobile communication terminal 10. The home node (HA) 30 of the home server (HA) 30 is transmitted through a predetermined network 25. At this time, the home node manager 30 stores the address of the visitor node manager 20 in which the mobile communication terminal 10 is located among the data transmitted from the visitor node manager 20. That is, the home node manager 30 stores an address (COA) of the location to which the mobile communication terminal 10 belongs, that is, the address of the visitor node manager 20. Thereafter, the home node manager 30 transmits a location registration response signal (Registration Replay) in response to the location registration request signal of the mobile communication terminal 10 received from the visitor node manager 20. 20). Through this process, location registration of the mobile communication terminal 10 is performed. As such, the mobile communication terminal 10 can receive data from a specific communication node (CN) 40 only when the location of the mobile communication terminal 10 is registered in the home node manager 30. . Here, the communication node 40 is a host of a general network to perform data communication with the mobile communication terminal 10. Next, a process of communication between the mobile communication terminal 10 and the communication node 40 will be described with reference to FIG. 2.
    [13] FIG. 2 is a diagram schematically illustrating a data transmission process in a network for allocating mobile IP to a mobile communication terminal.
    [14] First, when the location of the mobile communication terminal 10 is registered in the home node manager 30 through the location registration process as described with reference to FIG. 1, data communication between the communication node 40 and the mobile communication terminal 10 is performed. This process is described. In addition, the network 25 between the visitor node manager 20 and the home node manager 30 and the network 25 between the home node manager 30 and the communication node 40 and the visitor node manager 20 communicate with each other. The network 25 between the nodes 40 may be the same network or may be different networks. In the following description, it is assumed that the network 25 is a network using an Internet protocol (hereinafter referred to as "IP").
    [15] The communication node 40 is a computer to transmit data to a predetermined Internet server or the mobile communication terminal 10, and is a host of a general network to perform data communication with the mobile communication terminal 10. . When the communication node 40 transmits data to the mobile communication terminal 10, the communication node 40 transmits data to the home node manager 30 through the IP network 25. Then, since the home node manager 30 stores the addresses of the visitor node managers managed by the home node manager 30 itself, the visitor to which the mobile communication terminal 10 belongs among the stored addresses of the visitor nodes. The IP address of the node manager is transmitted to the visitor node manager 20 through the IP network 25. The visitor node manager 20 then transmits data to the mobile communication terminal 10. At this time, the data transmitted to the mobile communication terminal 10 includes the address of the communication node 40 as a sender. On the contrary, when the mobile communication terminal 10 intends to transmit data to the communication node 40, the mobile communication terminal 10 transmits the data to the visitor node manager 20. The visitor node manager 20 then transfers the data transmitted by the mobile communication terminal 10 directly to the communication node 40 without passing through the home node manager 30. This is because the mobile communication terminal 10 requests the transmission of data with a destination address, and as a result, the data transmission path and the reception path are different.
    [16] In recent years, as Internet services are being used at low prices all over the world, communication networks are moving toward accommodating Internet services, and active research is being conducted to accommodate Internet services in private networks. Is in progress. Based on these studies, research is being conducted on virtual private networks (VPNs) that can be location-independent, and active research is being conducted to assign and use static IPs even when moving to other regions. have.
    [17] In addition, the above-mentioned private network can be classified into two types, which will be described below. The first is a dedicated WAN that connects the sites with a permanent line, and the second is a dial network that uses a public network (PSTN) and dials whenever necessary. . Next, a configuration of a network in which a virtual private network is connected through a router and a data transmission / reception process will be described with reference to FIG. 3. In FIG. 3, the IP backbone is connected to routers, and the Internet service provider (ISP) routers 120, 130, and 140 illustrated in FIG. 3 are CPEs (Customer Promise Equipment) routers. It is an edge router to connect to the network. Here, the CPE router is a device required for a mobile subscriber to access a virtual private network at a specific location, and the Internet service provider router is a device operated by the Internet service provider, and the subscriber wants to receive data input from the CPE routers. Connect to a private network. The routers 120, 130, and 140 of the IP network 100 form an IP tunnel to transmit and receive data. In addition, a stub link is formed between the Internet service provider router and the CPE router. If necessary, a backup link is formed between the CPE router and the Internet service provider router existing in the other location, and a backdoor link is formed between the CPE routers. Through the above configuration, the Internet service is made, and actual communication is made.
    [18] However, the virtual private network has a form that can be supported on the Internet through the IP tunnel by creating an IP tunnel where users who use the virtual private network exist. However, as described above with reference to FIGS. 1 and 2, mobile communication terminals subscribed to the virtual private network can move anywhere, so that data transmission and reception of the mobile communication terminals can be made to an Internet service provider in a specific area. It is not possible to store all the information for. Therefore, there is a problem that it is impossible for the server of the virtual private network to transmit data to the mobile communication terminal first.
    [19] Accordingly, an object of the present invention is to provide a method for a server to perform data transmission to a mobile communication terminal in a virtual private network.
    [20] Another object of the present invention is to provide a method in which a server transmits data to a mobile communication terminal first in a virtual private network when the mobile communication terminal and the server are not connected to each other.
    [21] The method of the present invention for achieving the above objects; In a virtual private network, a server transmits data to a specific mobile communication terminal, wherein when the router detects that data is transmitted from the server to a specific mobile communication terminal, the server transmits the data to the Internet service provider router connected to the virtual private network. Requesting to retrieve a visitor node manager address to which a specific mobile communication terminal belongs, and if the internet service provider router detects a request for searching for a visitor node manager address, the home node manager determines the visitor node manager address to which the specific mobile communication terminal belongs. Searching through the home node manager; and searching for the visitor node manager address to which the specific mobile communication terminal belongs by the home node manager, the router corresponding to the searched visitor node manager address. Here the node manager and process, the visitor data is routed to the manager node routing the data is characterized in that it comprises the step of transmitting the data to search for the location of the particular mobile terminal.
    [1] 1 is a diagram illustrating a schematic configuration of a mobile IP network for allocating mobile IP to a mobile communication terminal;
    [2] 2 is a diagram schematically illustrating a data transmission process in a network for allocating mobile IP to a mobile communication terminal;
    [3] FIG. 3 schematically illustrates a network configuration in which a virtual private network (VPN) is connected through a router based on an IP network.
    [4] 4 is a diagram schematically illustrating a configuration of a virtual private network for transmitting data from a server to a mobile communication terminal according to an embodiment of the present invention.
    [5] FIG. 5 adds an IP address to the devices of FIG.
    [6] FIG. 6 illustrates a message format for querying a visitor node manager address to which a mobile communication terminal belongs according to an embodiment of the present invention.
    [7] 7 illustrates a message format for responding to a visitor node manager address to which a mobile communication terminal belongs according to an embodiment of the present invention.
    [8] 8 illustrates a signal flow for transmitting data from a server to a mobile communication terminal in a virtual private network according to an embodiment of the present invention.
    [22] Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that in the following description, only parts necessary for understanding the operation according to the present invention will be described, and descriptions of other parts will be omitted so as not to distract from the gist of the present invention.
    [23] 4 is a diagram schematically illustrating a configuration of a virtual private network for transmitting data from a server to a mobile communication terminal according to an embodiment of the present invention.
    [24] In an embodiment of the present invention, for convenience of explanation, a virtual private router network (VPRN) connecting the virtual private network (VPN) to a router will be described as an example. Shall be. As shown in FIG. 4, the IP backbone is connected to routers, and the Internet Service Provider (ISP) edge routers 411, 413, and 415 shown in FIG. , 417 is an edge router to be connected to the customer promise equipment (CPE) router 419. Here, the CPE router 419 is a device required for the mobile node (MN) 421 to access the virtual private router network at a specific location, and the Internet service provider end routers 411, 413, 415, 417 are the Internet service. As a device operated by an operator, data input from the CPE router 419 is connected to a virtual private network desired by the subscriber. The final routers 411, 413, 415, 417 are IP networks based on IP (Internet Protocol), and the final routers 411, 413, 415, 417 are IP. A tunnel is formed to transmit and receive data. In addition, a stub link is formed between the Internet service provider end routers 411, 413, 415, 417 and the CPE router 419.
    [25] The mobile communication terminal 421 wirelessly transmits a location registration request signal to a visitor node manager (FA) 423 serving as a base station, as described above with reference to FIG. 1. The visitor node manager 423 issues a location registration request including the location information of the visitor node manager 423 included in the location registration request signal of the mobile communication terminal 421 and the home node of the mobile communication terminal 421. The home agent (HA) 425 is notified through the IP network. At this time, the home node manager 425 stores the address of the visitor node manager 423 in which the mobile communication terminal 421 is located. That is, the home node manager 425 stores an address (COA) of the location to which the mobile communication terminal 421 belongs, that is, the address of the visitor node manager 423. Thereafter, the home node manager 425 sends a location registration response signal (Registration Replay) to the visitor node manager in response to the location registration request signal of the mobile communication terminal 421 received through the visitor node manager 423. Forward to (423). Through this process, location registration of the mobile communication terminal 421 is performed. As such, the location of the mobile communication terminal 421 is registered in the home node manager 425 to transmit data from a specific communication node (CN) 427. Herein, the communication node 427 is a host of a general network to perform data communication with the mobile communication terminal 421. In the embodiment of the present invention, when the server (VPN Server) 429 of the virtual private network connected to the CPE router 419 to the mobile communication terminal 421 intends to transmit data, the home node manager ( It is possible to obtain the location information of the visitor node manager to which the mobile communication terminal 421 belongs by contacting 425. Thus, it is possible for the virtual private network server 429 to first transmit data to the mobile communication terminal 421 belonging to the obtained visitor node manager.
    [26] Next, the configuration of the virtual private network of the present invention described with reference to FIG. 4 will be described with reference to FIG. 5 with an IP address structure according to a process in which the virtual private network server first transmits data to an actual mobile communication terminal. FIG. 5 is a diagram in which an IP address is added to the devices of FIG. 4.
    [27] Referring to FIG. 5, it will be assumed that the virtual private network server 429 has an IP address of “5.5.5.5” as an example. Thus, when data to be transmitted from the virtual private network server 429 to the mobile communication terminal 421 occurs, the virtual private network server 429 must find a visitor node manager to which the mobile communication terminal 421 belongs. Here, it is assumed that the mobile communication terminal 421 has an IP address of "1.1.1.1" as an example. In order to find the visitor node manager to which the mobile communication terminal 421 belongs, the virtual private network server 429 moves to transmit the data through the CPE router 419 to which the virtual private network server 429 belongs. A visitor node manager search is requested for the mobile communication terminal 421 to obtain information of the visitor node manager to which the communication terminal 421 belongs, that is, an IP address. Here, it will be assumed that the CPE router 419 has an IP address of "5.5.5.X" as an example. Then, the CPE router 419 sends the mobile communication terminal to the Internet service provider router to which the CPE router 419 itself belongs, that is, the Internet service provider router A 411, according to the request of the virtual private network server 429. Request a visitor node manager to which (421) belongs. In addition, it is assumed that the Internet service provider router A 411 has an IP address of "5.5.X.X" as an example.
    [28] Then, the Internet service provider router A (411) is a home node manager (425) to which the mobile communication terminal 421 corresponding to the IP address, including the IP address of the mobile communication terminal 421, is currently located and belongs. Retrieve the visitor node manager. Here, since the message format according to the visitor node manager search request to which the mobile communication terminal 421 belongs and the process thereof are described below with reference to FIG. 6, a detailed description thereof will be omitted. It is assumed that the home node manager 425 has an IP address of “1.1.XX” as an example, and the visitor node to which the mobile communication terminal 421 currently belongs according to the request of the router A 411 of the Internet service provider. Search for the manager 423, and the information of the visitor node manager 423 to which the mobile communication terminal 421 currently belongs, that is, the IP address of the visitor node manager 423 according to the search result, is determined. To 411. Here, since the message format for responding to the IP address of the visitor node manager 423 to which the mobile communication terminal 421 belongs and the process thereof are described below with reference to FIG. 7, a detailed description thereof will be omitted. .
    [29] In this way, the Internet service provider router A 411, which has received the IP address of the visitor node manager 423 to which the mobile communication terminal 421 currently belongs, is connected to the Internet service provider router A 411 itself. An Internet service provider router having an IP address corresponding to the IP address of the answered visitor node manager (423) among the Internet service provider routers (413, 415, 417). That is, the Internet service provider router B 415 is determined. Here, it is assumed that the Internet service provider router B 415 has an IP address of "2.2.X.X" as an example. Then, the Internet service provider router A 411 and the Internet service provider router B 415 are connected, and thus the CPE router 4213 and the Internet service provider router B 415 are connected to the virtual private network server. 429 transmits data to the Internet service provider router B 415. In this way, the Internet service provider router B 415 which has received data from the virtual private network server 429 is a visitor node manager 423 according to the IP address of the mobile communication terminal 421 which will finally receive the data. And transmit the data to the determined visitor node manager 423 so that the mobile communication terminal 421 receives the data. Here, the visitor node manager 423 has an IP address of "2.2.2.2" as an example.
    [30] Next, the IP address search request and the response message format of the visitor node manager to which the above-described mobile communication terminal 421 belongs will be described with reference to FIGS. 6 and 7.
    [31] 6 illustrates a message format for obtaining a visitor node manager IP address to which a mobile communication terminal belongs according to an embodiment of the present invention.
    [32] First, in order to retrieve the IP address of the visitor node manager 423 to which the mobile communication terminal 421 to which data is to be transmitted is transmitted from the virtual private network server 429, the Internet service provider 411 goes to the home node manager 425. The visitor node manager address search request (Care Of Address) message as shown in FIG. 6 is transmitted to request the IP address of the visitor node manager 423. In this case, the message name such as inquire COA (Care Of Address) is randomly designated. The message format is a destination IP address including a message type area 611 that specifies a type of a message to be transmitted first, and an IP address of the mobile communication terminal 421 to which the data is to be transmitted. The structure of the area 613 and other reserved areas 615 is provided. Thus, with the IP address of the mobile communication terminal 421, the home node manager 425 can search for the visitor node manager to which the mobile communication terminal 421 having the IP address belongs. That is, the home node manager 425 finds the visitor node manager to which the mobile communication terminal 421 belongs from among the visitor node manager addresses stored by the home node manager 425 itself. Accordingly, the home node manager 425 responds to the address of the visitor node manager to which the mobile communication terminal 421 belongs through a message visitor node manager address search response (inform of care of address) message as shown in FIG. 7. do. Note that message names such as inform COA are arbitrary.
    [33] Thus, the format of the visitor node manager IP address response message which is a response message to the visitor node manager IP address search message having the format as shown in FIG. 6 will be described below with reference to FIG.
    [34] FIG. 7 illustrates a message format for responding to a visitor node manager IP address to which a mobile communication terminal belongs according to an embodiment of the present invention. As described above, as the Internet service provider 411 transmits the visitor node manager IP address search message as shown in FIG. 6 to the home node manager 425, the home node manager 425 responds thereto. Do this. That is, the home node manager 425 searches for the visitor node manager to which the mobile communication terminal 421 belongs by referring to the IP address of the mobile communication terminal 421 included in the visitor node manager IP address search message. It becomes possible. Then, the home node manager 425 transmits the IP address of the visitor node manager to which the searched mobile communication terminal 421 belongs, that is, the visitor node manager 423, in the visitor node manager IP address response message. do. In this case, the visitor node manager IP address response message includes a message type region 711 that designates a type of a message transmitted first, as shown in FIG. 7, and a visitor to which the mobile communication terminal 421 belongs. A visitor node manager IP address (Care Of Address) area 713 including the node manager's IP address and a reserved area 715 other than this are provided.
    [35] Next, a data transmission process when the virtual private network server attempts to transmit data to a specific mobile communication terminal first will be described with reference to FIG. 8.
    [36] 8 is a diagram illustrating a signal flow for transmitting data from a server to a mobile communication terminal in a virtual private network according to an embodiment of the present invention.
    [37] Referring to FIG. 8, first, when the virtual private network server 429 detects a data generation for first transmitting data to the mobile communication terminal 421 at the CPE router 419 (step 811), the CPE router 419 ) Requests an Internet service provider router, ie, Internet service provider router A 411, to which the CPE router 419 itself is connected to search for a visitor node manager to which the mobile communication terminal 421 to which the data is to be transmitted belongs. (Step 813). Then, the Internet service provider router A 411 visits the home node manager 425 to retrieve the visitor node manager to which the mobile communication terminal 421 belongs, that is, to retrieve the IP address of the visitor node manager. In step 815, a message requesting the manager IP address is transmitted (inquire COA). Then, the home node manager 425 has the IP address of the mobile communication terminal 421 included in the visitor node manager IP address search message, and thus the visitor node manager to which the mobile communication terminal 421 belongs, that is, the visitor. The IP address of the node manager 423 is retrieved (step 817). The home node manager 425, which retrieves the IP address of the visitor node manager 423 to which the mobile communication terminal 421 belongs, responds to the visitor node manager IP address of the retrieved IP address of the visitor node manager 423. The message is included in the message and transmitted to the Internet service provider A 411 (inform COA) (step 819). The Internet service provider router A 411 which has received the visitor node manager IP address response message from the home node manager 425 is the mobile terminal 421 to which the mobile communication terminal 421 belongs, that is, the visitor node manager IP address response message. Routing to the Internet service provider router corresponding to the IP address included in the Internet service provider router B (415) (step 821). When the internet service provider router A 411 and the internet service provider router B 415 are connected, the CPE router 419 and the internet service provider B 415 are connected to the mobile communication terminal 421. Data to be transmitted is transmitted to the Internet service provider B 415 (step 823). The Internet service provider B 415 then selects the visitor node manager to which the mobile communication terminal 421 to which the data is to be transmitted belongs, that is, the visitor node manager 423 having the IP address included in the visitor node manager IP address response message. In operation 825, the searched data is transmitted to the searched visitor node manager 423. In operation 827, the visitor node manager 423 refers to the IP address of the mobile communication terminal 421 to receive the data.
    [38] Meanwhile, in the detailed description of the present invention, specific embodiments have been described, but various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined not only by the scope of the following claims, but also by the equivalents of the claims.
    [39] The present invention as described above has the advantage that in a virtual private network, the server can search in real time the visitor node manager to which the mobile communication terminal belongs so that the server can first transmit data to the mobile communication terminal. . Thus, it is possible to unilaterally transmit specific information from the server to the mobile communication terminal.
    权利要求:
    Claims (20)
    [1" claim-type="Currently amended] A method for retrieving a visitor node manager address to which a mobile communication terminal belongs,
    An internet service provider router connected to the virtual private network server to transmit data from the virtual private network server to the mobile communication terminal, requesting a home node manager to retrieve the visitor node manager address;
    The home node manager searching for the searched visitor node manager address;
    And transmitting, by the home node manager, the searched visitor node manager address to the internet service provider router.
    [2" claim-type="Currently amended] The method of claim 1,
    And searching for the visitor node manager address comprises transmitting a visitor node manager address search request message including an address of the mobile terminal.
    [3" claim-type="Currently amended] The method of claim 1,
    And transmitting the visitor node manager address to the visitor node manager address search response message including the address of the visitor node manager.
    [4" claim-type="Currently amended] The method of claim 1,
    The internet service provider router may further include receiving a visitor node manager address search request to which the mobile communication terminal belongs from the virtual private network server before requesting the home node manager to search for the visitor node manager address. And a visitor node manager address to which the mobile communication terminal belongs.
    [5" claim-type="Currently amended] The method of claim 1,
    Retrieving the visitor node manager address to which the mobile communication terminal belongs by routing the data to the received visitor node manager address by an internet service provider router receiving the visitor node manager address from the home node manager; How to.
    [6" claim-type="Currently amended] In the virtual private network, a server transmits data to a specific mobile communication terminal,
    If the router detects that data is transmitted from the server to a specific mobile communication terminal, requesting the Internet service provider router connected to the virtual private network to retrieve a visitor node manager address to which the specific mobile communication terminal belongs;
    Searching for the visitor node manager address to which the specific mobile communication terminal belongs by a home node manager when the internet service provider router detects the visitor node manager address search request;
    Routing the data to the visitor node manager corresponding to the searched visitor node manager address by the Internet service provider router searching for the visitor node manager address to which the specific mobile communication terminal belongs through the home node manager;
    And the visitor node manager to which the data is routed, searches for the location of the specific mobile communication terminal and transmits the data to the server in the virtual private network.
    [7" claim-type="Currently amended] The method of claim 6,
    Searching for the visitor node manager address to which the specific mobile communication terminal belongs by the Internet service provider router;
    Transmitting a visitor node manager address search message to the home node manager when a search for the visitor node manager address to which the mobile communication terminal belongs is requested from the router;
    And transmitting the visitor node manager address search message and receiving a visitor node manager address response message from the home node manager to search for the visitor node manager address to which the specific mobile communication terminal belongs. The server transmits the data to the mobile terminal.
    [8" claim-type="Currently amended] The method of claim 7, wherein
    The visitor node manager address search message;
    In the virtual private network, a server transmits data to a mobile communication terminal, comprising: a message type area specifying a type of a currently transmitted message; and a destination address area indicating an address of a mobile communication terminal to which the data is to be transmitted. How to.
    [9" claim-type="Currently amended] The method of claim 7, wherein
    The visitor node manager address response message;
    And a visitor node manager address area indicating a visitor node manager address to which the mobile communication terminal belongs, and a message type area specifying a type of a message currently being transmitted. How to transfer.
    [10" claim-type="Currently amended] The method of claim 6,
    And wherein the virtual private network is based on an internet protocol network, wherein a server transmits data to a mobile communication terminal in a virtual private network.
    [11" claim-type="Currently amended] The method of claim 6,
    And the address is an internet protocol address, wherein the server transmits data to the mobile communication terminal in the virtual private network.
    [12" claim-type="Currently amended] A method for transmitting data to a mobile communication terminal by a server in a virtual private network,
    When the SIP router detects that data to be transmitted from the server of the virtual private network is generated to the specific mobile communication terminal, requesting to retrieve the visitor node manager address to which the specific mobile communication terminal belongs to the Internet service provider router connected to the SIP router. Process,
    When the internet service provider router detects the visitor node manager address search request, transmitting the visitor node manager address search message including the address of the specific mobile communication terminal to the home node manager;
    The home node manager receiving the visitor node manager address search message transmits the visitor node manager address to which the mobile communication terminal belongs to the Internet service provider router through the visitor node manager address response message by referring to the address of the specific mobile communication terminal. Process,
    In response to the visitor node manager address response message, controlling the router to route the server to another internet service provider router to which the found visitor node manager belongs;
    The server transmits the data to the other internet service provider router, and the other internet service provider router transmits the data to the searched visitor node manager to control the data to be transmitted to the specific mobile communication terminal. The server in the virtual private network characterized in that the server transmits data to the mobile communication terminal.
    [13" claim-type="Currently amended] The method of claim 12,
    Searching for the visitor node manager address to which the specific mobile communication terminal belongs by the Internet service provider router;
    Transmitting a visitor node manager address search message to the home node manager when a search for the visitor node manager address to which the mobile communication terminal belongs is requested from the router;
    And transmitting the visitor node manager address search message and receiving a visitor node manager address response message from the home node manager to search for the visitor node manager address to which the specific mobile communication terminal belongs. The server transmits the data to the mobile terminal.
    [14" claim-type="Currently amended] The method of claim 12,
    The visitor node manager address search message;
    In the virtual private network, a server transmits data to a mobile communication terminal, comprising: a message type area specifying a type of a currently transmitted message; and a destination address area indicating an address of a mobile communication terminal to which the data is to be transmitted. How to.
    [15" claim-type="Currently amended] The method of claim 12,
    The visitor node manager address response message;
    And a visitor node manager address area indicating a visitor node manager address to which the mobile communication terminal belongs, and a message type area specifying a type of a message currently being transmitted. How to transfer.
    [16" claim-type="Currently amended] A method for transmitting data to a mobile communication terminal by a server in a virtual private network,
    Receiving a visitor node manager search request to which the mobile communication terminal belongs from any node belonging to the virtual private network;
    Sending a first message to a home node manager including an address associated with the mobile communication terminal to retrieve the visitor node manager address after receiving the visitor node manager search request;
    Receiving a second message including the visitor node manager address from the home node manager after transmitting the first message;
    Identifying a router corresponding to the received visitor node manager address;
    And transmitting data from the arbitrary node to the mobile communication terminal through the router and the visitor node manager.
    [17" claim-type="Currently amended] The method of claim 16,
    And wherein said arbitrary node comprises a SIP router. The method of claim 1, wherein the server transmits data to the mobile communication terminal in the virtual private network.
    [18" claim-type="Currently amended] The method of claim 16,
    The control of transmitting data from the arbitrary node to the mobile communication terminal is to control data transmission from the virtual private network server to the mobile communication terminal through the arbitrary node, the router, and the visitor node manager. Characterized in that the server transmits data to the mobile communication terminal in a virtual private network.
    [19" claim-type="Currently amended] A method for transmitting data to a mobile communication terminal by a server in a virtual private network,
    Transmitting a visitor node manager address search request to which the mobile communication terminal belongs;
    Receiving a router address corresponding to the visitor node manager address and the visitor node manager address;
    And transmitting data to the router via the visitor node manager address to transmit data to the mobile communication terminal.
    [20" claim-type="Currently amended] The method of claim 19,
    Detecting that data targeting the mobile communication terminal occurs before transmitting the visitor node manager address retrieval request; and wherein the server transmits data to the mobile communication terminal in the virtual private network. .
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    CN1404277A|2003-03-19|
    GB2378359A|2003-02-05|
    GB2378359B|2004-03-31|
    FI20021313A0|2002-07-03|
    KR100469718B1|2005-02-02|
    AU770760B2|2004-03-04|
    SE0202055D0|2002-07-03|
    GB0215235D0|2002-08-14|
    FR2828978A1|2003-02-28|
    SE0202055L|2003-01-04|
    SE524945C2|2004-10-26|
    ITMI20021463A1|2004-01-02|
    JP2003046549A|2003-02-14|
    AU5276602A|2003-01-09|
    FI20021313A|2003-01-04|
    ITMI20021463D0|2002-07-02|
    DE10229863A1|2003-02-20|
    FI20021313D0|
    US20030021253A1|2003-01-30|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    2001-07-03|Priority to KR20010039567
    2001-07-03|Priority to KR1020010039567
    2002-07-03|Application filed by 삼성전자 주식회사
    2003-01-14|Publication of KR20030004135A
    2005-02-02|Application granted
    2005-02-02|Publication of KR100469718B1
    优先权:
    申请号 | 申请日 | 专利标题
    KR20010039567|2001-07-03|
    KR1020010039567|2001-07-03|
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