JP2006319453A - Mobile portable terminal device based on sip and ipv6, packet communication method, and packet communication system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mobile portable terminal device a packet communication method, and a packet communication system based on the SIP and IPv6 which can continue communication by the SIP, even if an actually connecting network segment is changed by the movement or the like without the intermediation of an intermediate unit by housing an SIP control unit, and also, can make a call and communication by the IP. <P>SOLUTION: The mobile portable terminal devices 110, 120 mutually transmit and receive terminal unique numbers and store the terminal unique numbers and IP addresses by making them correspond to each other. The mobile portable terminal device 110 transmits its own terminal unique number and its own IP address in the network 103 to the mobile portable terminal device 120 when its IP address is changed by movement. When the transmitted terminal unique number is coincident with the stored terminal unique number, the mobile portable terminal device 120 starts IP communication again by storing the IP address in the network 103 after making it correspond to the transmitted terminal unique number. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a mobile portable terminal device that implements a communication function based on SIP and a communication function based on IPv6, a packet communication method and a packet communication system based on those communication functions, and in particular, the source address of the mobile portable terminal device has changed. It is related with the mobile portable terminal device which can continue communication by a new address by notifying, a packet communication method, and a packet communication system.

  In communication using IP (Internet Protocol), when each mobile mobile terminal device moves and the network segment of the connection destination changes, the IP address of the mobile mobile terminal device itself is newly allocated. Cannot continue. If the receiving side can identify that the IP address of the mobile terminal device that has moved has changed, communication can be continued with the new IP address.

  In recent years, communication using a protocol called Mobile IPv6, which is being put into practical use, allows communication using the same IPv6 address regardless of the network segment to which the mobile portable terminal device is actually connected. In communication using Mobile IPv6, the mobile portable terminal device acquires a dedicated IPv6 address called a home address, and also acquires a substantial IPv6 address in the destination network called a care-of address. The home address is an address in a network segment called a home network. A server device called a home agent is connected to the home network. The home agent has information for associating the home address and the care-of address of each mobile mobile terminal device, and transfers data addressed to the home address of the mobile mobile terminal device transmitted from the outside to the care-of address of the mobile mobile terminal device. Or the data transmitted from the mobile portable terminal device to the external terminal device is transferred as data whose source is the home address of the mobile portable terminal device.

  In order to realize communication using Mobile IPv6, a telecommunications carrier that provides a network must install a home agent. Therefore, there is a problem that the burden on the communication carrier is large and the spread of IPv6 communication in the mobile portable terminal device does not advance.

  Note that handover or roaming between heterogeneous communication networks that maintain communication between a first mobile unit that communicates via a first communication network and a second mobile unit that communicates via a second communication network Methods, computer program products, and computer readable media have been proposed (see, for example, Patent Document 1).

Japanese translation of PCT publication No. 2004-527928 (paragraphs 0040-0043)

  However, in the method described in Patent Document 1, in the communication between the first unit and the second unit, when the first unit switches the connection from the first communication network to the third communication network, the third unit There is a problem that it is essential to intervene units. Note that the third unit, which is an intermediate unit, authenticates the first unit and the second unit.

  Therefore, the present invention provides a mobile portable terminal device based on SIP and IPv6, a packet communication method, and a packet that can continue communication even if the network segment actually connected changes due to movement or the like without going through an intermediate unit. An object is to provide a communication system.

  The mobile portable terminal device based on SIP and IPv6 according to the present invention is a mobile portable terminal device based on SIP and IPv6 that implements SIP and IPv6 communication functions and can send and receive IPv6 packets with other mobile portable terminal devices in a SIP session. And a terminal unique number storage means for storing a terminal unique number and an IPv6 address of another mobile portable terminal device in association with each other, and when a new IPv6 address is acquired by changing the network segment of the connection destination, Terminal unique number mounted packet generating means for generating a terminal unique number mounted packet that is a packet including a unique IPv6 address and a terminal unique number that can identify itself, and transmitting the packet to another mobile mobile terminal device; Included in the received packet with unique terminal number When the terminal unique number matches the terminal unique number stored in the terminal unique number storage means, the IPv6 address stored in the terminal unique number storage means is updated to the IPv6 address included in the terminal unique number-equipped packet. And an address processing means.

  That is, the mobile portable terminal device according to the present invention has a SIP communication function and a function of sending a terminal unique number such as IMEI, and can perform peer-to-peer communication with other mobile portable communication devices via the Internet via SIP. is there. In IPv6, a new address is allocated even if the segment changes, and the IPv6 Internet connection continues. Therefore, in the present invention, in order to continue the SIP communication even if the mobile portable terminal device moves, the other party is notified of the terminal unique number such as IMEI as a mark that the own address has changed. If connectivity can be ensured, each mobile portable terminal device may be responsible for authentication in a SIP session. Therefore, it is preferable that the mobile portable terminal device further has an authentication server function necessary for SIP. In effect, the mobile portable terminal device has a home agent function and can be continuously connected without going through an intermediate unit.

  An initial terminal unique number-equipped packet generating means for generating an initial terminal unique number-equipped packet, which is a packet including a terminal unique number and an IPv6 address, and transmitting the packet to another mobile portable terminal device before starting the session; and an initial terminal unique number When the mounted packet is received, a terminal unique number setting unit that stores the terminal unique number and the IPv6 address included in the received initial terminal unique number loaded packet in the terminal unique number storage unit may be provided. According to such a configuration, it is possible to automatically create IPv6 address information by referring to the telephone number or mail address registered in the terminal unique number storage means and transmit it to each mobile portable terminal device. .

  A packet communication means for performing packet communication with other mobile portable terminal devices when a predetermined operation is performed may be provided. According to such a configuration, immediate communication is possible by pressing a predetermined button.

  The packet communication method based on SIP and IPv6 according to the present invention is a mobile portable terminal device that implements a SIP and IPv6 communication function and can send and receive IPv6 packets in a SIP session and a packet based on SIP and IPv6 in other mobile portable terminal devices. A communication method, in which a terminal unique number of another mobile mobile terminal device and an IPv6 address are stored in association with each other, and a new IPv6 address is obtained when the network segment of the connection destination is changed and a new IPv6 address is acquired. Terminal unique number-equipped packet that is a packet including the terminal unique number that can identify itself and is transmitted to other mobile portable terminal devices, and when the terminal unique number-equipped packet is received, the received terminal unique number The terminal unique number included in the installed packet is stored. If there is a match with the terminal unique number, and updates the IPv6 address stored in the IPv6 address included in the terminal unique number mounting packets.

  Received when an initial terminal unique number-equipped packet is generated and transmitted to another mobile terminal device, and the initial terminal unique number-equipped packet is received before the session starts. The terminal unique number and the IPv6 address included in the initial terminal unique number mounted packet may be stored. According to such a configuration, it is possible to automatically create IPv6 address information by referring to the telephone number or mail address registered in the terminal unique number storage means and transmit it to each mobile portable terminal device. .

  When a predetermined operation is performed, packet communication may be performed with another mobile portable terminal device. According to such a configuration, immediate communication is possible by pressing a predetermined button.

  The packet communication system based on SIP and IPv6 according to the present invention is based on SIP and IPv6 including a mobile portable terminal device that implements a SIP and IPv6 communication function and can transmit and receive IPv6 packets with other mobile portable terminal devices in a SIP session. In the packet communication system, the mobile portable terminal device has a terminal unique number storage means for storing a terminal unique number and an IPv6 address of another mobile portable terminal device in association with each other, and a connection destination network segment is changed to a new one. Terminal unique number loading packet that generates a terminal unique number loaded packet that is a packet including a new IPv6 address and a terminal unique number that can identify itself when the IPv6 address is acquired, and transmits the packet to another mobile mobile terminal device Receives packets with packet generation means and terminal unique number If the terminal unique number included in the received terminal unique number mounting packet matches the terminal unique number stored in the terminal unique number storage means, the IPv6 address stored in the terminal unique number storage means is An IPv6 address processing means for updating to an IPv6 address included in the unique number mounting packet is provided.

  An initial terminal unique number-equipped packet generating means for generating an initial terminal unique number-equipped packet, which is a packet including a terminal unique number and an IPv6 address, and transmitting the packet to another mobile portable terminal device before starting the session; and an initial terminal unique number When the mounted packet is received, a terminal unique number setting unit that stores the terminal unique number and the IPv6 address included in the received initial terminal unique number loaded packet in the terminal unique number storage unit may be provided. According to such a configuration, it is possible to automatically create IPv6 address information by referring to the telephone number or mail address registered in the terminal unique number storage means and transmit it to each mobile portable terminal device. .

  A packet communication means for performing packet communication with other mobile portable terminal devices when a predetermined operation is performed may be provided. According to such a configuration, immediate communication is possible by pressing a predetermined button.

  According to the present invention, even when the network segment actually connected changes due to movement or the like, and the IPv6 address is redistributed, the communication partner IPv6 address is changed by the unique terminal identification number such as IMEI. Since the terminal that can be recognized and has the same unique terminal identification number can be determined as the other party, communication can be continued by changing the destination IPv6 address. Further, it is possible to connect to each mobile portable terminal device so that packet communication can be performed without depending on the user's operation. Furthermore, it is possible to connect simultaneously with a plurality of mobile portable terminal devices, and multicast communication is possible. Since it is automatically connected to each mobile portable terminal device so that packet communication is possible, and communication can be continued even when moving, for example, immediate communication is possible by pressing a predetermined button. Become.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an explanatory diagram for explaining an outline of a packet communication system based on SIP and IPv6 according to the present invention. The packet communication system shown in FIG. 1 includes a mobile portable terminal device 110, a mobile portable terminal device 120, a radio base station 210-1, a radio base station 210-2, a radio base station 220-1, and a radio base station. 220-2, radio base station 230-1, radio base station 230-2, packet switch 310, packet switch 320, packet switch 330, IP gateway 410, IP gateway 420, IP gateway 430 Is provided.

  The radio base stations 210-1 and 210-2 are each communicably connected to the packet switch 310, and the packet switch 310 is communicably connected to the IP gateway 410. The network 101, which is the same network segment, includes radio base stations 210-1, 210-2, a packet switch 310, and an IP gateway 410.

  Similarly, the radio base stations 220-1 and 220-2 are each connected to be able to communicate with the packet switch 320, and the packet switch 320 is connected to be able to communicate with the IP gateway 420. The network 102 which is the same network segment includes radio base stations 220-1 and 220-2, a packet switch 320 and an IP gateway 420. The radio base stations 230-1 and 230-2 are each connected to be able to communicate with the packet switch 330, and the packet switch 330 is connected to be able to communicate with the IP gateway 430. The IP gateways 410, 420, and 430 are communicably connected via the Internet 100. The network 101 which is the same network segment includes radio base stations 230-1 and 230-2, a packet switch 330 and an IP gateway 430.

  In the following description, the mobile portable terminal device 110 is in a position where wireless communication with the wireless base station 210-1 is possible, and the mobile portable terminal device 120 is in a position where wireless communication with the wireless base station 220-1 is possible. It shall be.

  The mobile mobile terminal devices 110 and 120 are mobile mobile terminal devices such as mobile phones and PDAs (Personal Digital Assistants), and are connected to a packet communication network and a wireless circuit switching network provided by a communication carrier. In the present embodiment, a mobile phone will be described as an example of mobile mobile terminal devices 110 and 120.

  The radio base stations 210-1, 210-2, 220-1, 220-2, 230-1, 230-2 are devices at the end of the packet communication network and the radio circuit switching network, and are mobile terminal devices 110, Communicate directly with 120. For example, the radio base station 210-1 outputs a packet transmitted by the mobile portable terminal device 110 to the packet switch 310 and transmits a packet output by the packet switch 310 to the mobile portable terminal device 110.

  When the packets transmitted by the radio base stations 210-1 to 230-2 are packets transmitted via the Internet 100, the packet switches 310, 320, and 330 correspond to the protocols of the networks 101 to 103 and the Internet 100. The packet is converted and output to the IP gateways 410 to 430. When the destination of the received packet is a terminal device in the same network, routing is performed and the packet is output to the corresponding radio base station.

  The IP gateways 410, 420, and 430 are server devices that perform routing for connecting the Internet and the networks 101, 102, and 103. The IP gateways 410, 420, and 430 assign IPv6 addresses to mobile portable terminal devices that are connected to the networks 101, 102, and 103, respectively.

  Referring to FIG. 1, the mobile portable terminal device 110 is given an IPv6 address in the network 101 from the IP gateway 410 via the packet switch 310 by connecting to the radio base station 210-1.

  The mobile portable terminal device 110 uses the IPv6 address in the network 101 to connect to the Internet via the radio base station 210-1, the packet switch 310, and the IP gateway 410, and performs IPv6 communication with the mobile portable terminal device 120. Similarly, the mobile portable terminal device 120 uses the IPv6 address in the network 102 to connect to the Internet via the radio base station 220-1, the packet switch 320, and the IP gateway 420, and performs IPv6 communication with the mobile portable terminal device 110. Do. The mobile portable terminal devices 110 and 120 mutually transmit and receive terminal unique numbers such as IMEI (International Mobile Equipment Identity). The mobile mobile terminal device 110 stores the mobile phone terminal device 120 and the mobile mobile terminal device 120 stores the mobile phone terminal device 110 in association with the terminal unique number and the IPv6 address.

  Here, when the mobile portable terminal device 110 moves and performs IPv6 communication via the radio base station 230-1, the packet switch 330 and the IP gateway 430 of the network 103, the mobile portable terminal device 110 is connected to the network 101. An IPv6 address cannot be used, and an IPv6 address in the network 103 is newly assigned from the IP gateway 430.

  The mobile portable terminal device 110 transmits its own terminal unique number and the IPv6 address in the network 103 to the mobile portable terminal device 120. The mobile portable terminal device 120 searches for the terminal unique number to be stored based on the transmitted terminal unique number, and if it matches, stores the IPv6 address in the network 103 in association with it. The mobile portable terminal device 120 transmits the response information to the mobile portable terminal device 110 and starts IPv6 communication again.

  FIG. 2 is a block diagram illustrating a configuration example of the mobile portable terminal device 110. The mobile portable terminal device 110 shown in FIG. 2 includes a SIP session / IPv6 protocol control unit 1, an IPv6 packet generation unit 2, a Hello packet generation unit 3, a terminal unique number 4, a memory (address table) 5, and a control. Unit 6, memory unit 7, wireless communication unit 8, digital signal processing unit 9, audio signal processing unit 10, speaker 11, microphone 12, display control unit 13, display unit 14, and input detection Unit 15, operation keys 16, and I / O port control unit 17. 2 shows a configuration example of the mobile portable terminal device 110, the configuration example of the mobile portable terminal device 120 is the same as the configuration example of the mobile portable terminal device 110 shown in FIG.

  The SIP session / IPv6 protocol control unit 1 is a circuit having a function of executing control for performing communication by SIP (Session Initiation Protocol) and control for performing packet communication by IPv6. The SIP session / IPv6 protocol control unit 1 transmits / receives packetized IPv6 packets and Hello packets output from the audio signal processing unit 10 and the I / O port control unit 17 via the wireless communication unit 8.

  The IPv6 packet generation unit 2 is a circuit having a function of executing processing for generating an IPv6 packet to be transmitted to the packet communication network. The IPv6 packet generation unit 2 generates, as option data specified by the extension header of the IPv6 packet, an IPv6 packet including a terminal unique number such as IMEI in the payload which is a data area. Further, the IPv6 packet generation unit 2 generates an IPv6 packet with an IPv6 header added with an IPv6 address of a communication partner stored in the memory (address table) 5 as a destination address.

  The Hello packet generation unit 3 is a circuit having a function of periodically confirming communication of a connection and executing processing for generating a Hello packet when the network segment of the connection destination is changed. The Hello packet generation unit 3 generates a Hello packet in which an IPv6 header in which its own IPv6 address is set as a source IPv6 address is added to data including a terminal unique number such as IMEI. The Hello packet generation unit 3 is realized by, for example, an IPv6 Ping program using the ICMPv6 protocol.

  The terminal unique number 4 is a storage area for storing a terminal unique number such as IMEI. The terminal unique number is a unique number that can identify the mobile portable terminal device. The terminal unique number 4 is realized by, for example, a ROM (Read Only Memory).

  The memory (address table) 5 is a storage area for storing the IPv6 address of the mobile portable terminal device itself. The address table 5 is a storage area for storing information including an IPv6 address of a communication partner, a terminal unique number, a mail address and a telephone number in SMS (Short Message Service) as an address table. The address table 5 is realized by, for example, a nonvolatile memory.

  The control unit 6 includes a CPU (not shown) that controls each part of the mobile portable terminal device 110 and a ROM (not shown) that stores various control programs executed by the CPU. The memory unit 7 is a storage area for storing various setting information, and is realized by, for example, a nonvolatile memory.

  The wireless communication unit 8 performs wireless communication with a base station of a wireless circuit switching network and a packet communication network via an antenna (not shown). The mobile portable terminal device 110 can perform telephone and data communication with communication devices such as other mobile portable terminal devices via a wireless circuit switching network and a packet communication network.

  The digital signal processing unit 9 has a function of executing processing such as converting an analog signal such as voice into a digital signal. The audio signal processing unit 10 has a function of executing processing for controlling input / output of audio signals. The speaker 11 is a received voice output device for making a call, and the microphone 12 is a voice input device for making a call.

  The display control unit 13 has a function of executing processing for displaying various types of information on the display unit 14. The display unit 14 is realized by a display device such as a liquid crystal display device or an organic EL (Electroluminescence) display device, and displays information.

  The input detection unit 15 has a function of executing processing for outputting information input from the operation keys 16 to the control unit 6. The operation key 16 includes a plurality of keys for inputting information.

  The I / O port control unit 17 has a function of executing processing for controlling communication with other devices. The I / O port control unit 17 performs communication with a peripheral storage device, for example.

  In the present embodiment, the terminal specific number-equipped packet generation means is realized by the Hello packet generation unit 3. The terminal unique number storage means is realized by the address table 5. The IPv6 address processing means, the initial terminal unique number loaded packet generating means, the terminal unique number setting means, and the packet communication means are realized by the control unit 6 executing a program for realizing its function.

  Next, the operation of the present embodiment will be described with reference to the drawings. 3, 4 and 5 are flowcharts showing an example of packet call / communication processing.

  When the power of the mobile portable terminal devices 110 and 120 is turned on, the mobile portable terminal devices 110 and 120 connect to a packet communication network contracted with a communication carrier in advance using a wireless circuit switching network. For example, the mobile portable terminal device 110 is connected to the IP gateway 410, and the mobile portable terminal device 120 is connected to the IP gateway 420 (step S1).

  The IP gateway 410 transmits an IPv6 address in the network 101 to the mobile portable terminal device 110. The control unit 6 of the mobile portable terminal device 110 stores the received IPv6 address in the address table 5. Similarly, the IP gateway 420 transmits an IPv6 address in the network 102 to the mobile portable terminal device 120. The control unit 6 of the mobile portable terminal device 120 stores the received IPv6 address in the address table 5. (Step S2).

  The control unit 6 transmits IPv6 address information to the mobile portable terminal device 120 by a function such as SMS (Short Message Service) preinstalled in the ROM provided in the control unit 6 of the mobile portable terminal device 110 (step S3). . The IPv6 address information is information including the telephone number or mail address of the mobile portable terminal device 120 as a destination and the IPv6 address of the mobile portable terminal device 110 as a text. Similarly, the mobile portable terminal device 120 transmits IPv6 address information to the mobile portable terminal device 110. The control unit 6 may automatically create IPv6 address information by referring to the telephone number or mail address registered in the address table 5 and transmit it to each mobile portable terminal device.

  The control unit 6 of the mobile portable terminal device 110 receives the IPv6 address information transmitted by the mobile portable terminal device 120, extracts the IPv6 address of the mobile portable terminal device 120, and stores it in the address table 5 (step S4). . Similarly, the control unit 6 of the mobile portable terminal device 120 receives the IPv6 address information transmitted by the mobile portable terminal device 110, extracts the IPv6 address of the mobile portable terminal device 110, and stores it in the address table 5. When the telephone number and mail address of the mobile portable terminal device 120 are already registered in the address table 5 of the mobile portable terminal device 110, the IPv6 address may be stored in association with them.

  The SIP session / IPv6 protocol control unit 1 performs key exchange by IPSEC (IP Security) by a procedure based on a normal IPv6 protocol to form a VPN (Virtual Private Network) (step S5).

  The Hello packet generation unit 3 of the mobile portable terminal device 110 generates a Hello packet including a terminal unique number such as IMEI stored in the terminal unique number 4 and transmits the Hello packet to the mobile portable terminal device 120. The SIP session / IPv6 protocol control unit 1 of the mobile portable terminal device 120 receives the Hello packet and outputs it to the control unit 6. The control unit 6 of the mobile portable terminal device 120 stores the terminal unique number of the mobile portable terminal device 110 in the address table 5 in association with the IPv6 address (step S6).

  Similarly, the Hello packet generation unit 3 of the mobile portable terminal device 120 generates a Hello packet including a terminal unique number such as IMEI stored in the terminal unique number 4 and transmits the Hello packet to the mobile portable terminal device 110. The SIP session / IPv6 protocol control unit 1 of the mobile portable terminal device 110 receives the Hello packet and outputs it to the control unit 6. The control unit 6 of the mobile mobile terminal device 110 stores the terminal unique number of the mobile mobile terminal device 120 in the address table 5 in association with the IPv6 address (step S7).

  The description will be continued with reference to FIG. The IPv6 packet generation unit 2 of the mobile portable terminal device 110 generates each signal for starting an SIP session to which an IPv6 header in which an IPv6 address in the network 101 is set as a transmission source address is added, and the SIP session / IPv6 protocol control unit 1 A SIP session is formed. When the mobile portable terminal device 110 is an initiator (initiator), the mobile portable terminal device 110 generates an INVITE signal and transmits it to the mobile portable terminal device 120. The mobile portable terminal device 120 notifies the user that it is called, for example, by a ringing tone or a pop-up display, and transmits the status to the mobile portable terminal device 110 as a status 180 (Ringing). . When responding to the call, the mobile portable terminal device 120 transmits a status 200 (OK) to the mobile portable terminal device 110. The mobile portable terminal device 110 transmits an ACK signal as communication permission. When the SIP session is established, the IPv6 packet generation unit 2 of the mobile portable terminal device 110 generates an IPv6 packet in which an IPv6 header in which an IPv6 address in the network 101 is set as a transmission source address is added to the call and communication data. . The mobile portable terminal device 110 and the mobile portable terminal device 120 perform a call or communication using an IPv6 packet (step S8).

  The description will be continued with reference to FIG. When the mobile portable terminal device 110 moves and performs IPv6 communication via the radio base station 230-1, the packet switch 330 and the IP gateway 430 of the network 103, the mobile portable terminal device 110 sets the IPv6 address in the network 101. It cannot be used. The mobile portable terminal device 110 newly connects to the IP gateway 430 and receives an IPv6 address in the network 103 (step S9).

  The Hello packet generation unit 3 of the mobile portable terminal device 110 generates a Hello packet including the terminal unique number such as IMEI stored in the terminal unique number 4 when the source IPv6 address is the IPv6 address in the network 103 and is mobile and portable. It transmits to the terminal device 120. When receiving the Hello packet including the terminal unique number, the mobile portable terminal device 120 searches for the terminal unique number stored in the address table 5 based on the received terminal unique number, and these terminal unique numbers match. In this case, the IPv6 address in the address table 5 is updated to the IPv6 address in the network 103 which is the source IPv6 address of the received Hello packet. The SIP session / IPv6 protocol control unit 1 of the mobile portable terminal device 120 transmits, as a response to the Hello packet, a response whose destination IPv6 address is the IPv6 address in the network 103 of the mobile portable terminal device 110 (step S10).

  The SIP session / IPv6 protocol control unit 1 of the mobile portable terminal device 110 performs key exchange by IPSEC according to a procedure based on a normal IPv6 protocol to form a VPN (step S11). When the VPN is formed, the IPv6 packet generation unit 2 of the mobile portable terminal device 110 generates an IPv6 packet in which an IPv6 header in which an IPv6 address in the network 103 is set as a transmission source address is added to the call and communication data. The mobile portable terminal device 110 and the mobile portable terminal device 120 can continue a call or communication using an IPv6 packet (step S12).

  FIG. 6 is a flowchart showing the operation of the mobile portable terminal device 110. In the following description, a case where the mobile portable terminal device 110 operates as an initiator is illustrated.

  When the power of the mobile portable terminal device 110 is turned on (step S21), the mobile portable terminal device 110 uses a wireless circuit switching network to connect to a packet communication network contracted with a communication carrier in advance, Connect to the IP gateway 410 (step S22).

  The mobile portable terminal device 110 receives an IPv6 address in the network 101 transmitted by the IP gateway 410. The control unit 6 stores the received IPv6 address in the address table 5 (step S23).

  The mobile portable terminal device 110 transmits IPv6 address information to the mobile portable terminal device 120 by SMS or the like installed in advance in the ROM included in the control unit 6 (step S24). In addition, the mobile portable terminal device 110 receives the IPv6 address information transmitted by the mobile portable terminal device 120 (step S25). The control unit 6 extracts the IPv6 address of the mobile portable terminal device 120 and stores it in the address table 5 (step S26).

  The SIP session / IPv6 protocol control unit 1 exchanges keys with the SIP session / IPv6 protocol control unit 1 of the mobile portable terminal device 120 by the IPSEC according to a procedure according to a normal IPv6 protocol to form a VPN (step S27).

  The Hello packet generation unit 3 generates a Hello packet including a terminal unique number such as IMEI stored in the terminal unique number 4 and transmits the Hello packet to the mobile portable terminal device 120 (step S28). When there is a response from the mobile portable terminal device 120, the process proceeds to step S29, and when there is no response, the process proceeds to step S24.

  In step S 29, the SIP session / IPv6 protocol control unit 1 receives the Hello packet transmitted by the mobile portable terminal device 120. The received Hello packet includes a terminal unique number such as IMEI stored in the terminal unique number 4 of the mobile portable terminal device 120. The control unit 6 stores the terminal unique number of the mobile portable terminal device 120 in association with the IPv6 address in the address table 5 (step S30).

  The SIP session / IPv6 protocol control unit 1 forms a SIP session with the SIP session / IPv6 protocol control unit 1 of the mobile portable terminal device 120 (step S31). When the SIP session is established, the IPv6 packet generation unit 2 of the mobile portable terminal device 110 generates an IPv6 packet in which an IPv6 header in which an IPv6 address in the network 101 is set as a transmission source address is added to the call and communication data. . The mobile portable terminal device 110 performs a call or communication using the IPv6 packet with the mobile portable terminal device 120 (step S32).

  When the mobile portable terminal device 110 moves and is communicably connected to the wireless base station 230-1 of the network 103 (step S33), the mobile portable terminal device 110 sets the IPv6 address in the network 103 transmitted by the IP gateway 430. Receive. The control unit 6 stores the received IPv6 address in the address table 5 (step S34).

  The Hello packet generation unit 3 generates a Hello packet including a terminal unique number such as IMEI stored in the terminal unique number 4, and the source IPv6 address is an IPv6 address in the network 103, and transmits the Hello packet to the mobile portable terminal device 120. (Step S35). When there is a response from the mobile portable terminal device 120, the process proceeds to step S36, and when there is no response, the process proceeds to step S24.

  In step S36, the SIP session / IPv6 protocol control unit 1 exchanges keys with the SIP session / IPv6 protocol control unit 1 of the mobile portable terminal device 120 by IPSEC in accordance with a normal IPv6 protocol procedure to form a VPN. When the VPN is formed, the IPv6 packet generation unit 2 of the mobile portable terminal device 110 generates an IPv6 packet in which an IPv6 header in which an IPv6 address in the network 103 is set as a transmission source address is added to the call and communication data. The mobile portable terminal device 110 can continue communication and communication with the mobile portable terminal device 120 using IPv6 packets (step S37).

  FIG. 7 is a flowchart showing the operation of the mobile portable terminal device 120. In the following description, a case where the mobile portable terminal device 110 operates as a responder is illustrated.

  When the power of the mobile portable terminal device 120 is turned on (step S41), the mobile portable terminal device 120 uses a wireless circuit switching network to connect to a packet communication network contracted with a communication carrier in advance, Connect to the IP gateway 420 (step S42).

  The mobile portable terminal device 120 receives the IPv6 address in the network 102 transmitted by the IP gateway 420. The control unit 6 stores the received IPv6 address in the address table 5 (step S43).

  The mobile portable terminal device 120 transmits IPv6 address information to the mobile portable terminal device 110 by SMS or the like installed in advance in the ROM included in the control unit 6 (step S44). Also, the mobile portable terminal device 120 receives the IPv6 address information transmitted by the mobile portable terminal device 110 (step S45). The control unit 6 extracts the IPv6 address of the mobile portable terminal device 110 and stores it in the address table 5 (step S46).

  The SIP session / IPv6 protocol control unit 1 exchanges keys with the SIP session / IPv6 protocol control unit 1 of the mobile portable terminal device 110 by IPSEC in accordance with a normal IPv6 protocol procedure to form a VPN (step S47).

  The Hello packet generation unit 3 generates a Hello packet including a terminal unique number such as IMEI stored in the terminal unique number 4 and transmits the Hello packet to the mobile portable terminal device 110 (step S48). When there is a response from the mobile portable terminal device 110, the process proceeds to step S49, and when there is no response, the process proceeds to step S44.

  In step S 49, the SIP session / IPv6 protocol control unit 1 receives the Hello packet transmitted by the mobile portable terminal device 110. The received Hello packet includes a terminal unique number such as IMEI stored in the terminal unique number 4 of the mobile portable terminal device 110. The control unit 6 stores the terminal unique number of the mobile portable terminal device 110 in the address table 5 in association with the IPv6 address (step S50).

  The SIP session / IPv6 protocol control unit 1 forms a SIP session with the SIP session / IPv6 protocol control unit 1 of the mobile portable terminal device 110 (step S51). When the SIP session is established, the IPv6 packet generation unit 2 of the mobile portable terminal device 120 generates an IPv6 packet in which an IPv6 header in which an IPv6 address in the network 101 is set as a transmission source address is added to the call and communication data. . The mobile portable terminal device 120 performs a call or communication using the IPv6 packet with the mobile portable terminal device 110 (step S52).

  Here, when it becomes impossible to communicate with the mobile portable terminal device 110 by IPv6 packet communication, it is monitored whether or not a Hello packet destined for itself is received until a predetermined time elapses. When received (step S53), the terminal unique number such as IMEI is extracted with reference to the payload of the received Hello packet (step S54). Based on the acquired terminal unique number, the control unit 6 searches for the terminal unique number stored in the address table 5 (step S55). If they match, the control unit 6 proceeds to step S56 and step S57. The process proceeds to step S44.

  In step S56, the control unit 6 stores the IPv6 address included in the received Hello packet in association with the matching terminal unique number, and updates the address table 5. The SIP session / IPv6 protocol control unit 1 transmits a response in which the destination IPv6 address is the IPv6 address in the network 103 of the mobile portable terminal device 110 as a response to the Hello packet.

  In step S57, the SIP session / IPv6 protocol control unit 1 exchanges keys with the SIP session / IPv6 protocol control unit 1 of the mobile portable terminal device 110 by the IPSEC according to a procedure based on a normal IPv6 protocol to form a VPN. When the VPN is formed, the IPv6 packet generation unit 2 of the mobile portable terminal device 120 creates an IPv6 packet destined for the IPv6 address updated in step S56, and makes a call or communication with the mobile portable terminal device 110 using the IPv6 packet. It can be continued (step S58).

  As described above, according to the present embodiment, since a terminal unique number such as IMEI is attached to the payload of the IPv6 packet and transmitted, and the communication partner is identified with reference to the terminal unique number, movement, etc. Thus, even when the network segment actually connected changes, communication can be continued without going through the home agent. That is, by maintaining the connection with the Hello packet, the connection is possible without being aware of the home agent server (third unit).

  In addition, by automatically referring to the telephone numbers and mail addresses registered in the address table 5, IPv6 address information is created and transmitted to each mobile portable terminal device, without depending on the user's operation. Each mobile terminal device can be connected to be able to perform packet communication. Furthermore, when information related to a plurality of mobile portable terminal devices is registered in the address table 5, it is possible to connect simultaneously with the plurality of mobile portable terminal devices, and multicast communication becomes possible.

  Furthermore, since it is automatically connected to each mobile portable terminal device so that packet communication is possible and communication can be continued even when moving, for example, by pressing a predetermined button, immediate communication can be performed. It becomes possible.

  In the present embodiment, IMEI is exemplified as the terminal unique number, but a telephone number or other unique number may be used. Moreover, although the case where ICMPv6 protocol is utilized was illustrated as the Hello packet generation part 3, if communication can be confirmed and the packet which provided the terminal intrinsic | native number can be produced | generated, it will not be limited to this.

  The present invention can be effectively applied to a mobile portable terminal device capable of packet communication and packet communication based on SIP and IPv6.

It is explanatory drawing explaining the outline | summary of the packet communication system by this invention. It is a block diagram which shows the structural example of a mobile portable terminal device. It is a flowchart which shows the example of a packet call and communication process. It is a flowchart which shows the example of a packet call and communication process. It is a flowchart which shows the example of a packet call and communication process. It is a flowchart which shows operation | movement of a mobile portable terminal device (starter). It is a flowchart which shows operation | movement of a mobile portable terminal device (responder).

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Internet 101,102,103 Network 110,120 Mobile portable terminal device 210-1,210-2 Radio base station 220-1,220-2 Radio base station 230-1,230-2 Radio base station 310,320,330 Packet switch 410,420,430 IP gateway

Claims (9)

In a mobile portable terminal device based on SIP and IPv6 that implements a SIP and IPv6 communication function and can send and receive IPv6 packets with other mobile portable terminal devices in a SIP session,
A terminal unique number storage means for storing a terminal unique number of another mobile mobile terminal device and an IPv6 address in association with each other;
When the network segment at the connection destination is changed and a new IPv6 address is acquired, a packet including a new IPv6 address and a terminal unique number that can identify itself is generated to generate another movement A terminal unique number-equipped packet generation means for transmitting to the mobile terminal device;
When the terminal unique number loaded packet is received, if the terminal unique number included in the received terminal unique number loaded packet matches the terminal unique number stored in the terminal unique number storage means, the terminal unique number storage means A mobile portable terminal device based on SIP and IPv6, comprising: an IPv6 address processing means for updating a stored IPv6 address to an IPv6 address included in a terminal unique number mounting packet. An initial terminal unique number-equipped packet generating means for generating an initial terminal unique number-equipped packet that is a packet including a terminal unique number and an IPv6 address and transmitting the packet to another mobile mobile terminal device before starting a session;
And a terminal unique number setting means for storing a terminal unique number and an IPv6 address included in the received initial terminal unique number loaded packet in the terminal unique number storage means when the initial terminal unique number loaded packet is received. The mobile portable terminal device according to 1. The mobile portable terminal device according to claim 1, further comprising a packet communication unit that performs packet communication with another mobile portable terminal device when a predetermined operation is performed. A packet communication method based on SIP and IPv6 in a mobile portable terminal device that implements SIP and IPv6 communication functions and can send and receive IPv6 packets in a SIP session, and other mobile portable terminal devices,
Storing the terminal unique number and the IPv6 address of another mobile mobile terminal device in association with each other;
When the network segment at the connection destination is changed and a new IPv6 address is acquired, a packet including a new IPv6 address and a terminal unique number that can identify itself is generated to generate another movement Send it to your mobile device,
When the terminal unique number loaded packet is received, if the terminal unique number included in the received terminal unique number loaded packet matches the stored terminal unique number, the stored IPv6 address is changed to the terminal unique number loaded packet. A packet communication method based on SIP and IPv6, comprising updating to an included IPv6 address. Before starting the session, an initial terminal unique number loaded packet that is a packet including the terminal unique number and the IPv6 address is generated and transmitted to the other mobile portable terminal device,
The packet communication method according to claim 4, wherein, when an initial terminal unique number mounting packet is received, a terminal unique number and an IPv6 address included in the received initial terminal unique number mounting packet are stored. The packet communication method according to claim 4 or 5, wherein packet communication is performed with another mobile portable terminal device when a predetermined operation is performed. A packet communication system based on SIP and IPv6, which includes a mobile portable terminal device that implements SIP and IPv6 communication functions and can send and receive IPv6 packets with other mobile portable terminal devices in a SIP session,
The mobile portable terminal device
A terminal unique number storage means for storing a terminal unique number of another mobile mobile terminal device and an IPv6 address in association with each other;
When the network segment at the connection destination is changed and a new IPv6 address is acquired, a packet including a new IPv6 address and a terminal unique number that can identify itself is generated to generate another movement A terminal unique number-equipped packet generation means for transmitting to the mobile terminal device;
When the terminal unique number loaded packet is received, if the terminal unique number included in the received terminal unique number loaded packet matches the terminal unique number stored in the terminal unique number storage means, the terminal unique number storage means A packet communication system based on SIP and IPv6, comprising: an IPv6 address processing means for updating a stored IPv6 address to an IPv6 address included in a packet with a terminal unique number. An initial terminal unique number-equipped packet generating means for generating an initial terminal unique number-equipped packet that is a packet including a terminal unique number and an IPv6 address and transmitting the packet to another mobile mobile terminal device before starting a session;
And a terminal unique number setting means for storing a terminal unique number and an IPv6 address included in the received initial terminal unique number loaded packet in the terminal unique number storage means when the initial terminal unique number loaded packet is received. 8. The packet communication system according to 7. The packet communication system according to claim 7 or 8, further comprising packet communication means for performing packet communication with another mobile portable terminal device when a predetermined operation is performed.

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