JP2009111835A - Terminal accommodation device, communications program, communication method, and communications system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a communication system having terminal accommodation devices for accommodating terminals, which enables a terminal in any terminal accommodation device to communicate with another terminal by using an address that belongs to the identical network. <P>SOLUTION: A communication between a first terminal accommodated in a terminal accommodation device and the other terminal are disclosed. The communication system equipped with a first terminal and the terminal accommodation device that accommodates the first terminal to connect to a first network comprises: a means for identifying a communication repeating device of a second network related to the first terminal by a predetermined procedure when authentication information used for authentication to accommodate the first terminal is given to the terminal accommodation device; an address information reading means for causing the terminal accommodation device to request an address allocation device of the second network for address information used by the first terminal to transmit and receive data; and a means for notifying the first terminal of the address information read by the terminal accommodation device. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a terminal accommodating device, a communication program, a communication method, and a communication system. For example, the present invention can be applied to a communication system that connects a communication terminal (for example, a wireless LAN terminal compatible with IEEE 802.11) to a network.

  An IEEE802.11-compliant wireless LAN (referred to as WiFi (Wireless Fidelity)) terminal (WiFi terminal) is quite widespread, while an IEEE802.16-compliant wireless MAN (WiMAX (Worldwide Interoperability for Microwaves)). Research on the network (WiMAX network) related to the network is also active, and practical application is imminent (see Non-Patent Document 1). In such a situation, for example, there is a system in which a WiFi terminal is accommodated in a gateway device (terminal accommodating device) and connected to a network such as the Internet using a wireless access line constructed using WiMAX. (See Non-Patent Document 2).

  FIG. 7 is a block diagram showing an example of the configuration of a conventional communication system 1A that connects a wireless communication terminal (WiFi terminal) to the Internet using WiMAX.

  8 to 11 are sequence diagrams showing an operation of connecting a wireless communication terminal (WiFi terminal) to the Internet in the conventional communication system 1A shown in FIG.

  The gateway device 100A accommodates communication terminals such as the wireless communication terminal 200A and the wired communication terminal 210A, and connects the accommodated terminals to the Internet N3 via the WiMAX network N1.

  In response to a request from the wireless communication terminal 200A, the gateway apparatus 100A notifies the accommodating wireless communication terminal 200A of a local address used only in the network under the gateway apparatus 100A by DHCP (Dynamic Host Configuration Protocol) (FIG. Step S204 shown in FIG. 10).

Thereafter, the packet transmitted from the wireless communication terminal 200A is converted by the function of the NAPT (Network Address Port Translation) in the gateway apparatus 100A with the IP address and port number of the gateway apparatus 100A, and is transmitted to the Internet N3 via the WiMAX network N1. Is sent out. Further, since the destination of the IP packet sent from the Internet N3 to the wireless communication terminal 200A is the IP address of the gateway device 100, it is sent from the Internet N3 to the WiMAX network N1, and similarly, by the NAPT function in the gateway device 100A, The IP address and the port number are converted and given to the radio communication terminal 200A.
Takashi Shono, “WiMAX to create the revised wireless broadband era”, published by Impress R & D, Inc., December 2005, p32 Takeshi Hattori and Masanobu Fujioka, “Revised Wireless Broadband Textbook-High Speed IP Wireless”, published by Impress R & D, June 2006, Chapters 4 and 5

  However, in the gateway device 100A shown in FIG. 7 described above, a plurality of communication terminals (wireless communication terminal 200A, wired communication terminal 210A) are connected, and a plurality of terminals (wireless communication terminal 200A, wired communication terminal 210A) are connected by the NAPT function. Since the communication is divided by the port number of one IP address of the gateway device 100A, even if there are communication terminals used by a plurality of users contracted with different ISPs, the same network (WiMAX network N1) Communication is performed using the IP address. Therefore, for example, an IP packet transmitted / received to / from the Internet by the wireless communication terminal 200A is transmitted to the other ISP network N2 even when the user (user of the wireless communication terminal 200A) has contracted with the other ISP network N2. The IP address of a different network is communicated as the source IP address without going through. For example, an additional service for each ISP such as a virus check service may limit the IP address of the communication terminal to be connected, and is different from the IP address related to the ISP network as described above. When a terminal accesses a server using an address, there is a problem in that it cannot receive service provision.

  Further, in the conventional communication system 1A, since the local address under the gateway device 100A is assigned to the wireless communication terminal 200A, for example, the wireless communication terminal 200A has both WiFi and WiMAX communication functions and has a WiMAX communication area. Already acquired a global address (Mobile IP address; MIP address), but if the IP address changes when the gateway device 100A moves to WiFi, the connection or service in communication is interrupted. There was a problem.

  Therefore, in a communication system having a terminal accommodating device that accommodates a terminal, even if the terminal is accommodated in any terminal accommodating device, the terminal communicates with another terminal using an address (for example, an IP address) related to the same network. A terminal accommodating device, a communication program, a communication method, and a communication system are desired.

  A terminal accommodating apparatus according to a first aspect of the present invention is (1) accommodating a first terminal and connecting it to a first network, and connecting the first terminal to another network at least via the first network. In the terminal accommodating device to be connected, (2) when authentication information used for authentication when accommodating the first terminal is given from the first terminal, the first terminal is related by a predetermined method. A communication relay device identifying means for identifying a communication relay device that relays communication between terminals in the second network; and (3) address information used by the first terminal for data transmission / reception in the second network. Address information acquisition means for requesting the address assignment apparatus for assigning and reading address information from the address assignment apparatus, and (4) the address read by the identification information acquisition means Distribution and, and having an, address information notification means for notifying the first terminal.

  The communication program of the second aspect of the present invention is (1) accommodating a first terminal and connecting it to a first network, and connecting the first terminal to another network at least via the first network. (2) When authentication information used for authentication when accommodating the first terminal is given from the first terminal, the computer mounted in the terminal accommodating device to be operated is given a predetermined method. A communication relay device identifying means for identifying a communication relay device that relays communication between the terminals in the second network to which the terminal relates; and (3) address information used by the first terminal for data transmission / reception. Address information acquisition means for requesting an address allocation device for allocating an address in the network and reading address information from the address allocation device, and (4) the identification information acquisition unit There the address information is read, a communication program for causing to function as an address information notification means for notifying the first terminal.

  According to a third communication method of the present invention, (1) a first terminal and the first terminal are accommodated and connected to a first network, and the first terminal is connected to at least the first network. In a communication method in a communication system comprising a terminal accommodating apparatus connected to another network via a communication relay apparatus identification means, an address information acquisition means, and an address information notification means, (2) the communication relay apparatus When the authentication information used for authentication when accommodating the first terminal is given from the first terminal to the terminal accommodating device, the identifying means is associated with the first terminal associated with the first terminal by a predetermined method. Identifying a communication relay device that relays communication between terminals in the network of (2), and (3) the address information acquisition means uses the terminal information to transmit and receive address information used by the first terminal for data transmission / reception. A request is made from the accommodating apparatus to the address allocating apparatus that allocates an address in the second network, and the address information is read from the address allocating apparatus. (4) The address information read in is notified to the first terminal.

  A communication system according to a fourth aspect of the present invention includes (1) a first terminal and the first terminal accommodated and connected to the first network, and the first terminal is connected to at least the first network. And (2) the communication terminal accommodation apparatus terminal accommodation apparatus according to the first aspect of the present invention is applied as the communication terminal accommodation apparatus terminal accommodation apparatus. And

  In a communication system having a terminal accommodating apparatus that accommodates a terminal, a communication system that communicates with other terminals using an address (for example, an IP address) related to the same network, regardless of which terminal accommodating apparatus accommodates the terminal. Can be provided.

(A) Main Embodiment Hereinafter, an embodiment of a terminal accommodating device, a communication program, a communication method, and a communication system according to the present invention will be described in detail with reference to the drawings. Note that the terminal accommodating device of this embodiment is a gateway device.

(A-1) Configuration of Embodiment FIG. 1 is a block diagram showing a functional configuration of a communication system 1 of this embodiment.

  In FIG. 1, the communication system 1 according to the embodiment connects a communication terminal (wireless communication terminal 200, wired communication terminal 210) to the WiMAX network N1 via the gateway device 100, and further via the WiMAX network N1. Connect to another network. In FIG. 1, a WiMAX network N1 is connected to another ISP network N2 and the Internet N3. The other network to which the WiMAX network N1 is connected is not limited to the other ISP network N2 and the Internet N3, and may be connected to another network.

  The WiMAX network N1 includes at least the gateway device 100, the BS300, the ASN-GW / FA400, the authentication server 500, the DHCP server 501, the HA502, the wireless communication terminal 200, the wired communication terminal 210, and the like, and can be connected to the Internet N3. Is.

  In the WiMAX network N1, for example, the BS 300 and the ASN-GW / FA 400 are components of an access service network (Access Service Network; ASN) related to a network connection provider (Network Access Provider; NAP). The DHCP server 501 and the HA 502 are components of a connection service network (Connectivity Service Network; CSN) according to a network provider (NSP) that is a WiMAX access service provider.

  The other ISP network N2 is, for example, a network provider (NSP) network different from the WiMAX network N1, and is connected to the WiMAX network N1 and the Internet N3. The other ISP network N2 includes at least the authentication server 600, the DHCP server 601, and the HA 602 as components.

  The communication system 1 may be constructed by applying the “mobile IP” technology as shown in FIG. Mobile IP is a technology that automates IP address management and transfer of communication packets to a destination when a terminal moves between networks on an IP network, and is defined by IETF RFC 2002, 2003, 3344, and the like. In a system to which mobile IP technology is applied, a unique IP address (Home Address, hereinafter referred to as “HoA”) of a terminal (corresponding to the wireless communication terminal 200 and the wired terminal 210 in FIG. 1) and movement of the terminal The location is managed by associating a care-of address (hereinafter referred to as “CoA”) for identifying the destination network, and the packet is transferred to the nearest router of the terminal using an encapsulation technique. Such a mechanism is a router that performs location management such as Home Agent (hereinafter referred to as “HA”) (corresponding to HA 502 and 602 in FIG. 1) and a Forward Agent (hereinafter referred to as “HAA”) that notifies the care-of address (CoA) to the HA. , “FA”) (corresponding to ASN-GW / FA400 in FIG. 1).

  The gateway apparatus 100 accommodates one or a plurality of communication terminals such as the wireless communication terminal 200 and the wired communication terminal 210, connects the accommodated communication terminals to the WiMAX network N1, and further, via the WiMAX network N1, for example, This is connected to another network such as another ISP network N2 and the Internet N3.

  The gateway device 100 has a program execution configuration such as a CPU, ROM, RAM, EEPROM, and hard disk, and a device having an interface for communicating with other communication devices (not limited to one, but a plurality of devices are distributedly processed) In other words, it is constructed by installing the communication program of the embodiment, and can be functionally shown as in FIG. Further, in FIG. 1, only one gateway device 100 is arranged in the WiMAX network N1, but a plurality of gateway devices 100 may be arranged under the BS 300 (ASN-GW / FA 400).

  The wireless communication terminal 200 is a communication terminal accommodated in the gateway device 100. The wireless communication terminal 200 may be, for example, a communication terminal that supports WiFi communication (wireless communication conforming to the IEEE 802.11 series). The wireless communication terminal 200 may be a communication terminal that supports WiMAX communication (wireless communication conforming to the IEEE 802.16 series) in addition to WiFi communication, for example. Here, it is assumed that the wireless communication terminal 200 performs WiFi communication with the gateway device 100. In FIG. 1, two wireless communication terminals 210-1 and 210-2 are arranged, but the number is not limited.

  Similarly, the wired communication terminal 210 is a terminal accommodated in the gateway device 100, and the gateway device 100 is a terminal connected by a wired LAN. In FIG. 1, two wired communication terminals 210-1 and 210-2 are arranged, but the number is not limited.

  The BS 300 is a base station and connects the gateway device 100 to the ASN-GW / FA 400. The BS 300 is connected to the gateway device 100 by wireless communication such as WiMAX communication, for example.

  ASN-GW / FA400 (Access Service Network-Gateway / Foreign Agent) has the functions of the above-mentioned FA (Foreign Agent). The ASN-GW / FA 400 notifies the HA 502 and 602 of information related to the communication terminals (wireless communication terminal 200 and wired communication terminal 210) accommodated by the subordinate gateway apparatus 100. The ASN-GW / FA 400 is connected to the gateway apparatus 100 via the BS 300, and connects the gateway apparatus 100 to the WiMAX network N1.

  The authentication server 500 performs authentication when a terminal is connected. For example, a terminal such as a gateway device 100 or a communication terminal (wireless communication terminal 200, wired communication terminal 210) is connected to the WiMAX network N1. Authentication. Since the authentication server 600 is the same as the authentication server 600 described above, detailed description is omitted.

  The DHCP server 501 issues an IP address to the terminal. The DHCP server 501 pays out an IP address, for example, to the gateway device 100 or a communication terminal (wireless communication terminal 200, wired communication terminal 210). Since the DHCP server 601 is the same as the DHCP server 601 described above, detailed description thereof is omitted.

  The HA 502 has the above-described HA (Home Agent) function, and manages which ASN-GW / FA 400 the wireless communication terminal 200 and the wired communication terminal 210 are accommodated under. Note that the HA 602 is connected to another ISP network N2, and therefore the terminal to be managed is different, but the function is the same as the HA 502 described above.

  Further, the HAs 502 and 602 also have a function as a router. For example, the HA 602 is connected to a communication terminal (wireless communication terminal 200, wired communication terminal 210) via the communication terminal ASN-GW / FA 400, BS 300, and gateway device 100, and is connected to a terminal of another ISP network N2 and the Internet N3. To relay. Further, in the HA 602, in response to a request from a gateway device connected to another network (for example, another ISP network N2), an IP to be given to a communication terminal accommodated in the requested gateway device The relay may be performed in which the address is acquired from the DHCP server 601 and the acquired IP address is notified to the gateway apparatus that has made the request.

  The gateway device 100 includes a control unit 101, a WiMAX wireless unit 102, a WiFi wireless unit 103, and a wired communication interface unit 104.

  The WiMAX wireless unit 102 is an interface for performing wireless communication using the BS 300 and WiMAX. The WiFi wireless unit 103 is an interface for performing wireless communication with the wireless communication terminal 200 using WiFi. The wired communication interface unit 104 is an interface for communicating with the wired communication terminal 210 via a wired LAN connection.

  The control unit 101 has a function of controlling communication in the gateway device 100, and includes a WiMAX control unit 105, a packet route control unit 106, a WiFi control unit 107, and a wired communication control unit 108.

  The WiFi wireless unit 103 controls the WiFi wireless unit 103 to control communication with an external communication terminal. The WiFi wireless unit 103 provides data given from an external communication terminal to the control unit 101 via the WiFi wireless unit 103, and applies information given from the control unit 101 via the WiFi wireless unit 103. To the external communication device.

  The wired interface unit 104 controls the wired interface unit 104 to control communication with an external communication terminal. The wired interface unit 104 provides data given from an external communication terminal to the control unit 101 via the wired interface unit 104, and sends information given from the control unit 101 to the corresponding information via the wired interface unit 104. To the external communication device.

  The WiMAX control unit 105 controls the WiMAX wireless unit 102 and controls WiMAX communication with an external communication terminal. The WiMAX control unit 105 gives data given from an external communication terminal to the control unit 101 via the WiMAX radio unit 102, and sends information given from the control unit 101 to the corresponding information via the WiMAX radio unit 102. To the external communication device.

  The packet route control unit 106 performs management control on transmission / reception of packets to be transmitted / received in the control unit 101, and includes a route control unit 109, a DHCP client unit 110, a CMIP client unit 111, and a DHCP-MIP conversion unit 112. Yes.

  The route control unit 109 transmits a packet sent from a communication terminal (wireless communication terminal 200, wired communication terminal 210) accommodated in the gateway apparatus 100 to a higher-level network terminal via the BS 300 via the ASN-GW. Control such as transferring to / FA400. Further, when a packet addressed to a communication terminal (wireless communication terminal 200, wired communication terminal 210) accommodated in the gateway device 100 is given, the route control unit 109 receives the corresponding communication terminal (wireless communication terminal 200, wired communication). Forward to terminal 210).

  The DHCP client unit 110 is connected to the DHCP server 501 via the ASN-GW / FA 400 and acquires an address set in the interface (WiMAX wireless unit 102) of the gateway device 100.

  The DHCP-MIP conversion unit 112 activates the CMIP client unit 111 in response to a DHCP request from a communication terminal (wireless communication terminal 200, wired communication terminal 210), and the CMIP client unit 111 is connected to an upper network (for example, DHCP). The MIP address (Mobile IP address) acquired from the servers 501 and 601) is notified to the communication terminal (wireless communication terminal 200, wired communication terminal 210). Details of the function of the DHCP-MIP conversion unit 112 will be described in the description of the operation described later.

  The CMIP client unit 111 acquires an MIP address acquired from an upper network (for example, the DHCP servers 501 and 601) in response to a request from the DHCP-MIP conversion unit 112. Details of the functions of the CMIP client unit 111 will be described in the description of operations described later.

  The control unit 101 also has the following functions. When the communication unit (wireless communication terminal 200, wired communication terminal 210) is accommodated in the gateway device 100, the control unit 101 is based on information given from the communication terminal (wireless communication terminal 200, wired communication terminal 210). The communication terminal (wireless communication terminal 200, wired communication terminal 210), when communicating with another network (for example, the Internet N3), the identification information (for example, IP) of the HA (for example, HA 602) of the network to be relayed Address).

  For example, in the control unit 101, when authentication information used for authentication to be accommodated in the gateway device 100 is given from a communication terminal (wireless communication terminal 200, wired communication terminal 210), based on the authentication information, a predetermined value is given. The HA IP address (HA address) of the network to be relayed may be acquired by the method.

  As a method for acquiring the IP address of the HA of the network relayed by the communication terminal based on the authentication information given from the communication terminal (wireless communication terminal 200, wired communication terminal 210), for example, authentication for the communication terminal is performed. When performed, it may be acquired from the authentication server 500 or 600. Further, for example, although not shown in FIG. 1, HA address information for each network that may be relayed is stored in advance or inside the gateway device 100, and is included in the authentication information. (For example, information related to the network to be relayed, such as a domain name) may be acquired and the HA IP address of the relayed network may be acquired, or may be applied in combination with the method of acquiring from the authentication server described above. good.

(A-2) Operation of Embodiment Next, the operation (communication method of the embodiment) of the communication system of this embodiment having the above-described configuration will be described.

  2 to 6 are sequence diagrams illustrating operations when the gateway apparatus 100 and the wireless communication terminal 200-1 connect to a network.

  2 and 3, steps S <b> 101 and S <b> 102 indicate operations when the gateway device 100 is activated and participates in the communication system 1. 4 to 6, for example, steps S103 to S105 are performed on the Internet N3 although the wireless communication terminal 200-1 participates in the communication system 1 and is not illustrated in FIG. 1 described above. It shows the operation when communicating with the terminal. Here, it is assumed that the user of the wireless communication terminal 200-1 has a contract with a network operator of another ISP network N2, and connects to the Internet N3 using the IP address of the other ISP network N2.

(A-2-1) Gateway Device Network Joining First, the operation when the gateway device 100 starts up and joins the communication system 1 will be described.

  Step S101 is a step in which authentication is performed by the authentication server 500 to activate the gateway device 100 and connect to the WiMAX network N1.

  Details of step S101 will be described below. First, when the gateway device 100 is activated, connection and authentication are started according to the IEEE 802.16e procedure. The WiMAX control unit 105 starts a WiMAX connection connection procedure according to the IEEE 802.16 procedure together with the WiMAX wireless unit 102 using the held authentication information of the gateway device 100, and the authentication information is BS300, ASN-GW / FA400. And is transmitted to the authentication server 500 and authenticated, and a WiMAX connection is established between the gateway apparatus 100 and the BS 300. The ASN-GW / FA 400 stores the address of the gateway device 100 (for example, the MAC address) and information related to the authenticated network (WiMAX network N1).

  Step S102 is a step in which an IP address or the like is set for the gateway apparatus 100 based on a request message from the gateway apparatus 100 to the DHCP server 501.

  Details of step S102 will be described below. When the WiMAX connection is established between the gateway apparatus 100 and the BS 300, the DHCP client unit 110 transmits a DHCP message for acquiring an IP address to the ASN-GW / FA 400 via the BS 300 in the gateway apparatus 100. The ASN-GW / FA 400 that has received the DHCP message from the gateway apparatus 100 relays the DHCP message from the stored MAC address to the DHCP server 501 related to the corresponding network (WiMAX network N1). The IP address given by is acquired.

  The ASN-GW / FA400, which is responsible for the FA (Foreign Agent) function of PMIP (Proxy Mobile IP), has its own IP address as CoA (Care of Address) and the acquired IP address as HoA (Home Address). It registers in 502 HA and notifies the acquired IP address to the gateway apparatus 100 by a DHCP message. In the gateway device 100, a DHCP message having the acquired IP address information is notified to the DHCP client unit 110 via the WiMAX wireless unit 102 and the WiMAX control unit 105. The DHCP client unit 110 extracts the acquired IP address from the notified DHCP message, and stores the IP address acquired by the control unit 101 although not shown in FIG.

(A-2-2) Network participation of wireless communication terminal Next, the operation when the wireless communication terminal 200-1 participates in the communication system 1 and communicates with a terminal existing on the Internet N3 will be described. Note that even when the wireless communication terminal 200-1 is replaced with the wired communication terminal 210, the description is omitted because it is almost the same as the case of the wireless communication terminal 200-1.

  In step S103, the network to which the wireless communication terminal 200-1 should originally connect (for example, the network of the provider with which the wireless communication terminal 200-1 is contracted) is identified as the other ISP network N2. Then, authentication for allowing the wireless communication terminal 200-1 to access another network (for example, the Internet N3) is performed via the HA 602 of the other ISP network N2.

  Details of step S103 will be described below. For example, when the wireless communication terminal 200 moves to an area where wireless communication with the gateway apparatus 100 is possible, connection and authentication are started between the wireless communication terminal 200 and the gateway apparatus 100 according to the IEEE 802.11 and IEEE 802.1X procedures. The In the gateway device 100, the WiFi control unit 107 gives the authentication information received from the wireless communication terminal 200 to the route control unit 109. Then, the route control unit 109 sends out authentication information via the WiMAX control unit 105 and the WiMAX wireless unit 102, and gives the authentication information to the authentication server 500 via the BS 300 and the ASN-GW / FA 400.

  When the authentication information is given to the authentication server 500, the authentication server 500 relays a message from the authentication information to the authentication server 600 of the corresponding network (other ISP network N2), and the authentication server 600 performs authentication. Then, authentication result information including the encryption key information from the authentication servers 600 and 500 is given to the gateway device 100. In gateway apparatus 100, based on the encryption key information, a connection including encryption is established with wireless communication terminal 200 according to the IEEE 802.11 procedure.

  In step S104, the wireless communication terminal 200-1 is given the IP address of the other ISP network N2, and the wireless communication terminal 200-1 is connected to another network (for example, the Internet N3) via the other ISP network N2 (HA 602). This is a step in which a route for accessing is secured.

  Details of step S104 will be described below. When the WiFi connection between the wireless communication terminal 200-1 and the gateway device 100 is completed by the above-described step S103, a DHCP message is received from the wireless communication terminal 200-1 to the gateway device 100 for acquiring an IP address. Sent. In the gateway device 100, the DHCP message is notified to the DHCP-MIP conversion unit 112 via the WiFi wireless unit 103 and the WiFi control unit 107.

  Then, the CMIP client unit 111 is activated by the DHCP-MIP conversion unit 112. Then, the control unit 101 specifies the HA address (HA602 address) stored in advance, or the HA address (HA602 address) based on the information acquired in the authentication in step S102 described above, and DHCP- The MIP conversion unit 112 notifies the CMIP client unit 111.

  From the CMIP client unit 111 to the ASN-GW / FA 400, a packet having information on CoA (address of ASN-GW / FA 400) and HA address (address of HA 602), the source address of the packet ( A packet (hereinafter referred to as “CMIP packet”) whose address is the address of the gateway device 100 is transmitted.

  When the CMIP packet is given from the gateway device 100 (CMIP client unit 111), the ASN-GW / FA 400 transfers the CMIP packet according to the HA address of the CMIP packet. Here, in the CMIP packet, since the HA address is the address of HA 602, the CMIP packet is transferred from ASN-GW / FA 400 to HA 602.

  When the CMIP packet sent from the gateway device 100 is given to the HA 602, the HA 602 communicates with the authentication server 600 and the 601 DHCP server, and the IP address (hereinafter referred to as “HoA-2”) of the corresponding network (other ISP network N2). ") Is acquired. And HoA-2 is notified to the gateway apparatus 100 via ASN-GW / FA400.

  In the gateway device 100, the HoA-2 is notified to the CMIP client unit 111 via the WiMAX wireless unit 102 and the WiMAX control unit 105.

  When HoA-2 is notified, the CMIP client unit 111 provides the notified HoA-2 to the DHCP-MIP conversion unit 112. When HoA-2 is given, the DHCP-MIP conversion unit 112 gives the IP address to the wireless communication terminal 200-1.

  Step S105 is a step in which the wireless communication terminal 200-1 communicates with a terminal such as a server on the Internet N3 via the HA 602 of the other ISP network N2.

  Details of step S105 will be described below. The packet transmitted from the wireless communication terminal 200-1 is transferred to the WiMAX network N1 by the route control unit 109 of the gateway device 100.

  In the WiMAX network N1, since the source address (source address) of the packet transmitted from the wireless communication terminal 200 is the IP address of the other ISP network N2, which is a different network from the own network (WiMAX network N1), the other ISP It is transferred to the network N2 and transmitted to the Internet N3.

  Further, since the IP packet from the Internet to the wireless communication terminal 200-1 is destined for the above-described HoA-2 (the address set in the HA 602 of the other ISP network N2), it is transmitted from the Internet to the HA 602. It is transferred to the ASN-GW / FA 400 of the WiMAX access provider by the MIP function of the HA 602. When the IP packet is transferred from the ASN-GW / FA 400, the gateway device 100 (route control unit 109) performs routing, and further the IP packet is transferred to the wireless communication terminal 200.

(A-3) Effects of Embodiment According to this embodiment, the following effects can be achieved.

  In this embodiment, the gateway apparatus 100 acquires the IP address of the other ISP network N2 with which the user of the wireless communication terminal 200-1 is contracted from the DHCP server 601 via the HA 602, and the wireless communication terminal 200- 1 is notified. The wireless communication terminal 200-1 uses the IP address of the other ISP network N2 as the IP address of the transmission source of the IP packet, and communicates with the server on the Internet N3 via the other ISP network N2 (HA 602). . That is, in the communication system 1 of this embodiment, terminal communication such as a server on the Internet is performed for each communication terminal (wireless communication terminal 200, wired communication terminal 210) via an ISP contracted by the user. can do. As a result, it is possible to obtain an additional service (for example, virus check) for each ISP that restricts the IP address of the terminal to be connected.

  In this embodiment, since the MIP address is assigned to the wireless communication terminal 200, the wireless communication that supports both WiFi and WiMAX communication and has already acquired a global address (MIP address) in the WiMAX communication area. Even when the terminal 200 moves under the control of the gateway apparatus 100 that performs only WiFi communication with the wireless communication terminal 200, the global address (MIP address) can be acquired in the same manner, so that the service can be continued without changing the IP address. There is an effect.

  Furthermore, as shown in step S104 of FIG. 5 described above, the communication terminal (wireless communication terminal 200, wired communication terminal 210) can acquire a global address (MIP address) only by communication with the gateway device 100 by DHCP. Therefore, even if the wireless communication terminal 200 does not support WiMAX communication, there is an effect that a global address (MIP address) can be acquired. Further, even when the communication terminal (wireless communication terminal 200, wired communication terminal 210) is not compatible with mobile IP, communication can be similarly performed using a global address (MIP address).

(B) Other Embodiments The present invention is not limited to the above-described embodiments, and may include modified embodiments as exemplified below.

(B-1) In the above embodiment, the gateway device 100 communicates with a communication terminal (wireless communication terminal 200, wired communication terminal 210) or an external communication device such as the ASN-GW / FA 400 by WiMAX or WiFi. However, other wireless systems may be used.

(B-2) In the above embodiment, the gateway device 100 includes the WiFi wireless unit 103 (WiFi control unit 107) and the wired interface unit 104 (wired communication control unit 108), and includes the wireless communication terminal 200 and the wired communication unit. Although the communication terminal 210 is accommodated, only the wireless communication terminal 200 may be accommodated by having only the WiFi wireless unit 103 (WiFi control unit 107), or only the wired interface unit 104 (wired communication control unit 108). And only the wired communication terminal 210 may be accommodated.

(B-3) In the above embodiment, as shown in step S105 of FIG. 6 described above, when the packet transmitted from the wireless communication terminal 200 is transmitted to the terminal on the Internet N3, the HA 602 is relayed. However, for example, a packet may be transmitted from the ASN-GW / FA 400 to a terminal on the Internet N3 without relaying the HA 602.

(B-4) In the above embodiment, for example, in the above description of FIGS. 4 to 6, the case where the user of the wireless communication terminal 200-1 has contracted with another ISP network N <b> 2 has been described. The communication terminal (wireless communication terminal 200, wired communication terminal 210) is not limited to the case where the user is contracted. For example, the user of the communication terminal normally relays through another ISP network N2. It may be the case where the Internet N3 is used. That is, for example, the user performs an operation to connect the communication terminal to the Internet N3 via the other ISP network N2, and the gateway device 100 is given authentication information for connecting to the other ISP network N2. If there is any relation, such as a case.

It is a block diagram which shows the functional structure of the communication system which concerns on embodiment. It is a sequence diagram (1) which shows operation | movement of the communication system which concerns on embodiment. It is a sequence diagram (2) which shows operation | movement of the communication system which concerns on embodiment. It is a sequence diagram (3) which shows operation | movement of the communication system which concerns on embodiment. It is a sequence diagram (4) which shows operation | movement of the communication system which concerns on embodiment. It is a sequence diagram (5) which shows operation | movement of the communication system which concerns on embodiment. It is a block diagram which shows the functional structure of the conventional communication system. It is a sequence diagram (1) which shows operation | movement of the conventional communication system. It is a sequence diagram (2) which shows operation | movement of the conventional communication system. It is a sequence diagram (3) which shows operation | movement of the conventional communication system. It is a sequence diagram (4) which shows operation | movement of the conventional communication system.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Communication system, 100 ... Gateway apparatus, 101 ... Control part, 102 ... WiMAX wireless part, 103 ... WiFi wireless part, 104 ... Wired interface part, 105 ... WiMAX control part, 106 ... Packet route control part, 107 ... WiFi control 108, wired communication control unit, 109 ... route control unit, 110 ... DHCP client unit, 111 ... CMIP client unit, 112 ... DHCP-MIP conversion unit, 200, 200-1, 200-2 ... wireless communication terminal, 210 , 210-1, 210-2... Wired communication terminals.

Claims (7)

In a terminal accommodating apparatus that accommodates a first terminal and connects it to a first network, and connects the first terminal to another network via at least the first network,
When authentication information used for authentication when accommodating the first terminal is given from the first terminal, communication between the terminals is performed in a second network related to the first terminal by a predetermined method. A communication relay device identifying means for identifying a communication relay device to be relayed;
Address information acquisition means for requesting address information used by the first terminal for data transmission / reception to an address allocation device that allocates an address in the second network and reading the address information from the address allocation device;
Address information notifying means for notifying the first terminal of the address information read by the identification information acquiring means;
A terminal accommodating device characterized by comprising:   The communication relay device specifying means includes identification information related to the communication relay device set in advance in the terminal accommodating device and / or information given from an external authentication device in authentication when accommodating the first terminal. The terminal accommodating device according to claim 1, wherein the communication relay device is identified based on the terminal.   When data sent from the first terminal to the second terminal is given, the given data is sent to the second terminal, and the second terminal sends the data to the first terminal. 3. The relay communication means for transferring the data sent to the first terminal to the first terminal when the data is given by relaying the intermediate communication relay device. The terminal accommodating device described in 1.   When the relay communication means is given data sent from the first terminal to the second terminal communicating with the first terminal, the relay communication means passes the given data via the intermediate communication relay device. The terminal accommodating apparatus according to claim 1, wherein the terminal accommodating apparatus transfers to the second terminal. A computer mounted in a terminal accommodating apparatus that accommodates a first terminal and connects it to a first network, and connects the first terminal to another network via at least the first network,
When authentication information used for authentication when accommodating the first terminal is given from the first terminal, communication between the terminals is performed in a second network related to the first terminal by a predetermined method. A communication relay device identifying means for identifying a communication relay device to be relayed;
Address information acquisition means for requesting address information used by the first terminal for data transmission / reception to an address allocation device that allocates an address in the second network and reading the address information from the address allocation device;
A communication program for causing address information read by the identification information acquiring means to function as address information notifying means for notifying the first terminal. A first terminal and a terminal accommodating apparatus that accommodates the first terminal and connects the first terminal to the first network, and connects the first terminal to another network at least via the first network. In the communication method in the communication system comprising, having a communication relay device identification means, address information acquisition means, address information notification means,
When the authentication information used for authentication when accommodating the first terminal is given from the first terminal to the terminal accommodating apparatus, the communication relay apparatus identifying means performs the first terminal by a predetermined method. Identifying a communication relay device that relays communication between terminals in the second network to which
The address information acquisition means requests address information used by the first terminal for data transmission / reception from the terminal accommodating apparatus to an address allocation apparatus that allocates an address in the second network, and receives an address from the address allocation apparatus. Reading information The address information notifying means notifies the first terminal of the address information read by the terminal accommodating device by the identification information acquiring means. A first terminal and a terminal accommodating apparatus that accommodates the first terminal and connects the first terminal to the first network, and connects the first terminal to another network at least via the first network. A communication system comprising:
A communication system characterized in that the communication terminal accommodation device terminal accommodation device according to claim 1 is applied as the communication terminal accommodation device terminal accommodation device.

Images