JP5480719B2 - Terminal device, prefix distribution device, IPv6 address generation system, and IPv6 address generation method - Google Patents

Description

  The present invention relates to a technology for generating an IP address in a terminal device, and more particularly to a technology in which a terminal device receives a prefix from a device such as a router and generates an IPv6 global address (hereinafter referred to as an IPv6 address). .

  In recent years, IPv6 has been used as an IP network protocol. An IPv6 address in IPv6 has a 128-bit space, and the upper 64 bits are generally used as a network identifier and are called a prefix. The lower 64 bits are used as an identifier of a terminal device in the network and are called an interface ID.

  In IPv6, a terminal device such as a PC terminal has a function of automatically generating an IPv6 address using a prefix received from a neighboring router. The IPv6 address is automatically generated by executing the following processing (see RFC 4861) between the terminal device and the router.

  First, the terminal device generates an interface ID from its own MAC address according to the EUI-64 rules. Then, the terminal device sets the generated interface ID in the lower 64 bits of the link local address (FE80 :: / 10), and sends a router solicitation message (Router Solicitation) including the link local address as a source address to the link local address. Send to all router multicast addresses.

  The router that has received the router solicitation message transmits a router advertisement message (Router Advertisement) in which various parameters such as a prefix and lifetime are set, to the link local all-nodes multicast address. Then, the terminal device that has received the router advertisement message generates an IPv6 address from the prefix included in the received message and the interface ID.

JP 2010-074835 A Special table 2009-500970 gazette

  In future mobile communication networks, it is planned to use an IP network based on IPv6 as the core network. As such a core network, for example, there is an EPC (Evolved Packet Core) specification core network standardized by 3GPP.

  However, a terminal device (for example, a UE with LTE (Long Term Evolution) specifications) used for mobile communication generally does not have a MAC address.

  Therefore, in such a terminal device, an interface ID cannot be generated using a MAC address, and an IPv6 address cannot be generated by the method described in the background art. As a method for assigning an IPv6 address to such a terminal device, a method is conceivable in which a terminal device (UE) is connected to a PC terminal having a MAC address and an IPv6 address generated by the PC terminal is given to the terminal device. However, in such a method, if the terminal device does not have a PC terminal, communication using an IPv6 address cannot be performed, and the usage mode of the terminal device is limited.

  In addition, in the conventional IPv6 generation technology, information about the terminal such as the terminal device type and capability is not notified to the prefix payout source, and the prefix payout source can be flexibly set according to the type and capability of the terminal device. There is also a problem that control such as determining parameter information such as lifetime and notifying the information cannot be performed.

  The present invention has been made in view of the above points, and allows a terminal device that does not have a MAC address to generate an IPv6 address and obtains parameter information according to the type and capability of the terminal device. It aims at providing the technique for making it possible to do.

  In order to solve the above problems, the present invention provides a terminal device for generating an IPv6 address, terminal information storage means for storing terminal identification information of the terminal device and additional information, the terminal identification information, The additional information is read from the terminal information storage means, an interface ID generating means for generating an interface ID including the terminal identification information and additional information, and a prefix distribution apparatus connected to the terminal apparatus via a communication network A prefix assignment request message transmitting means for transmitting a prefix assignment request message including the interface ID, and a prefix assignment response message including a prefix from the prefix distribution apparatus, and obtaining a prefix from the prefix assignment response message. It can be configured as a terminal device comprising a prefix assignment response message receiving means, an address generating means for generating an IPv6 address from the prefix and the interface ID generated by the interface ID generating means. .

  In the terminal device, the prefix assignment response message may include parameter information corresponding to the additional information, and the parameter information may be acquired from the prefix assignment response message.

  In addition, the terminal device includes a communication unit for communicating with an information device, and the interface ID generation unit acquires product information of the information device from the information device via the communication unit, and the additional information Alternatively, the interface ID may be generated by using the product information.

  The present invention is also a prefix distribution device that distributes a prefix of an IPv6 address to a terminal device via a communication network, and stores an interface ID including terminal identification information and additional information in association with the prefix. A prefix information storage means; a prefix assignment request message including an interface ID from the terminal device; a prefix assignment request message reception means for obtaining the interface ID from the prefix assignment request message; and the prefix based on the interface ID. A prefix information acquisition unit that acquires a prefix corresponding to the interface ID by searching the information storage unit, and a prefix assignment response including the prefix It is also possible to configure the message as a prefix distributing device, characterized in that it comprises a prefix allocation response message sending means for sending to said terminal apparatus.

  In the prefix distribution device, the prefix information storage unit stores parameter information in association with additional information, and the prefix information acquisition unit stores parameter information corresponding to additional information included in the interface ID. Obtained from the information storage means, the prefix assignment response message transmission means may transmit a prefix assignment response message including the parameter information in addition to the prefix to the terminal device.

  According to the present invention, it is possible to generate an IPv6 address in a terminal device that does not have a MAC address, and it is also possible for the terminal device to obtain parameter information related to the IPv6 address according to the type and capability of the terminal device. It becomes.

It is a system configuration figure concerning an embodiment of the invention. 2 is a functional configuration diagram of a terminal device 10. FIG. 2 is a functional configuration diagram of a prefix distribution device 20. FIG. It is a figure for demonstrating operation | movement of the system which concerns on embodiment of this invention. It is a figure for demonstrating interface ID. It is a figure which shows the example of the table information stored in the prefix information storage part. It is a figure which shows the example of the table information stored in the prefix information storage part. It is a functional lineblock diagram of terminal unit 10 and household appliances 50 in a modification. It is a figure for demonstrating the process which produces | generates interface ID in a modification.

  Embodiments of the present invention will be described below with reference to the drawings.

(System configuration)
FIG. 1 shows the configuration of the entire system including the IPv6 address generation system according to the embodiment of the present invention. The IPv6 address generation system includes a terminal device 10 and a prefix distribution device 20, and these are connected via a communication network 30.

  In FIG. 1, the communication network 30 is assumed to be an IP-based network including a core network of EPC (Evolved Packet Core) specifications. In FIG. A station 40 and a prefix distribution device 20 are shown.

  Here, in the present embodiment, the terminal apparatus 10 is a UE compliant with a standard such as LTE (Long Term Evolution), and the base station 40 is an eNB or the like in LTE, for example, but is not limited thereto. Instead, other devices may be used. It is assumed that the prefix distribution device 20 is an S-GW or a P-GW. The S-GW is a device that transmits / receives data to / from the terminal device 10, and the P-GW is a device that connects the EPC core network and an external network. Further, in the present embodiment, there is no limitation on the control protocol (mobility control protocol such as PMIP) used in the communication network 30, and any control protocol used will be described in the present embodiment. IPv6 address generation processing can be applied.

  Of course, the technology to which the present invention can be applied is not limited to the above-mentioned examples such as EPC. The present invention can also be applied to a terminal device other than a UE compliant with LTE or the like, or a device such as a router other than an S-GW or a P-GW.

  FIG. 2 shows a functional configuration diagram of the terminal device 10 in the present embodiment. As illustrated in FIG. 2, the terminal device 10 includes a wireless communication unit 11, an interface ID generation unit 12, a prefix assignment request message transmission unit 13, a prefix assignment response message reception unit 14, an IPv6 address generation unit 15, and a terminal information storage unit 16. , And a setting information storage unit 17. Note that FIG. 2 shows functional units related to IPv6 generation in the terminal device 10, and the terminal device 10 is necessary for data communication with other terminal devices via the communication network 30. Of course, it includes functions that do not. Hereinafter, the functional outline of each functional unit will be described.

  The wireless communication unit 11 is a functional unit that performs wireless communication with the base station 40. The terminal information storage unit 16 stores terminal identification information that can uniquely identify the terminal device 10 and additional information. In the present embodiment, the terminal identification information is IMSI (International Mobile Subscriber Identity). As the terminal identification information, the terminal device 10 can be uniquely identified, and identification information other than the IMSI may be used as long as the identification information is other than the MAC address.

  The additional information is, for example, a terminal type, location information, and terminal capability. The terminal type is, for example, a model name. The location information is, for example, position information of the terminal device 10. This location information may be location information of the base station 40 to which the terminal device 10 belongs, or location information acquired by a GPS device provided in the terminal device 10. The terminal capability is information indicating whether the terminal device 10 has a VoIP communication function, for example.

  The interface ID generation unit 12 is a functional unit that reads terminal identification information and additional information from the terminal information storage unit 16, generates an interface ID from these information, and stores the interface ID in the setting information storage unit 17.

  The prefix allocation request message transmission unit 13 generates a link local address including the interface ID generated by the interface ID generation unit 12, and transmits a prefix allocation request message including the link local address as a transmission source address to the prefix distribution device 20. It is a functional part.

  The prefix assignment response message receiving unit 14 receives a prefix assignment response message including a prefix and a lifetime from the prefix distribution apparatus 20 that has received the prefix assignment request message, and receives the prefix and the lifetime included in the prefix assignment response message. Is a functional unit that stores the information in the setting information storage unit 17.

  The IPv6 address generation unit 15 generates an IPv6 address using the prefix included in the prefix assignment response message and the interface ID generated by the interface ID generation unit 12 and stores the IPv6 address in the setting information storage unit 17 Part.

  FIG. 3 shows a functional configuration diagram of the prefix distribution apparatus 20. As shown in FIG. 3, the prefix distribution device 20 includes a network communication unit 21, a prefix assignment request message reception unit 22, a prefix information acquisition unit 23, a prefix assignment response message transmission unit 24, and a prefix information storage unit 25. Note that FIG. 3 shows functional units related to prefix distribution in the prefix distribution apparatus 20, and the prefix distribution apparatus 20 may include other functions not shown. For example, when the prefix distribution device 20 is an S-GW or a P-GW, the prefix distribution device 20 includes a necessary functional unit for functioning as an S-GW or a P-GW.

  The network communication unit 21 is a functional unit for performing data communication via the communication network 30. The prefix assignment request message reception unit 22 is a functional unit that receives a prefix assignment request message from the terminal device 10 and passes the interface ID included in the prefix assignment request message to the prefix information acquisition unit 23. The prefix information storage unit 25 is a storage unit that stores an interface ID, a prefix, a lifetime, and the like in association with each other.

  The prefix information acquisition unit 23 acquires a prefix and lifetime corresponding to the interface ID passed from the prefix assignment request message reception unit 22 from the prefix information storage unit 25 and passes them to the prefix assignment response message transmission unit 24. It is.

  The prefix assignment response message transmission unit 24 is a functional unit that creates a prefix assignment response message including the prefix and lifetime received from the prefix information acquisition unit 23 and transmits it to the terminal device 10.

(System operation)
Next, an IPv6 address generation operation in the system having the above-described configuration will be described with reference to FIG.

  First, the interface ID generation unit 12 in the terminal device 10 reads the terminal identification information and additional information from the terminal information storage unit 16, generates an interface ID from these information, and stores it in the setting information storage unit 17 (step 1). . In this embodiment, as shown in FIG. 5, a 64-bit interface ID is generated by concatenating terminal identification information and additional information. The length of the terminal identification information and the additional information may be determined to be 64 bits by concatenating the terminal identification information and the additional information. Alternatively, the length of the terminal identification information and the additional information may be 64. If it is less than a bit, for example, a bit having a value of 0 may be added so as to be 64 bits.

  In FIG. 4, subsequently, the prefix assignment request message transmission unit 13 in the terminal device 10 reads the interface ID generated by the interface ID generation unit 12 from the setting information storage unit 17, and sets the interface ID to the lower 64 bits. The link local address thus generated is generated (step 2).

  Then, the prefix allocation request message transmission unit 13 generates a prefix allocation request message in which the link local address is set as a transmission source address, and transmits the prefix allocation request message to the prefix distribution device 20 (step 3). In the present embodiment, the prefix assignment request message is a router solicitation in which the link local address is set as a source address.

  The prefix distribution device 20 receives the prefix assignment request message. The prefix assignment request message receiving unit 22 in the prefix distribution apparatus 20 that has received the prefix assignment request message acquires the interface ID from the prefix assignment request message and passes it to the prefix information acquisition unit 23 (step 4).

  Upon receiving the interface ID, the prefix information acquisition unit 23 searches the prefix information storage unit 25 using the interface ID as a key, thereby acquiring the prefix and lifetime corresponding to the interface ID from the prefix information storage unit 25. The payout information in the corresponding prefix pool record is set to “completed”, and the acquired information is passed to the prefix assignment response message transmission unit 24 (step 5).

  6 and 7 show examples of table information stored in the prefix information storage unit 25. FIG. In the table shown in FIG. 6, interface ID (terminal identification information + additional information), prefix pool identification information, and lifetime are stored in association with each other. FIG. 7 shows a pool X as an example of the prefix pool. As shown in FIG. 7, each pool stores individual prefixes and payout information. For example, in the search using the interface ID, when the pool X in FIG. 6 is applicable, the pool X in FIG. 7 is referred to, and one prefix is acquired from the prefixes whose payout information is “not yet”, and the payout is made. The information is “completed”. Instead of providing a prefix pool, the prefix itself may be stored in the prefix pool field in the table shown in FIG.

  These pieces of information are information that is predetermined and stored based on network design or the like. For example, the prefix pool (prefix) can be determined in association with the terminal identification information, and the lifetime can be determined in association with the additional information. In this case, for example, when the additional information is information indicating that VoIP communication is possible, the terminal device 10 may set a long lifetime in order to prevent frequent prefix request operations. it can. Thereby, useless communication resources can be suppressed. In this case, parameter storage means for storing the additional information and the lifetime in association with each other is provided separately from the prefix information storage section 25, and the prefix distribution device 20 includes both the parameter storage means and the prefix information storage section 25. You may make it refer.

  Further, for example, a prefix pool (prefix) may be defined in association with information obtained by combining terminal identification information and additional information. In this case, for example, when the additional information is position information, a prefix corresponding to the geographical area corresponding to the position information can be assigned.

  In this example, the lifetime of the prefix is given as an example of the parameter information associated with the additional information, but the parameter information associated with the additional information is not limited to the lifetime. In addition, it is not always necessary to store parameter information such as lifetime in the prefix information storage unit 25, and the prefix acquired from the prefix information storage unit 25 is included in the prefix assignment response message. As for, a value obtained by another method (a predetermined value or the like) may be set.

  Returning to FIG. 4, the prefix assignment response message transmission unit 24 creates a prefix assignment response message including the prefix and lifetime received from the prefix information acquisition unit 23, and transmits it to the terminal device 10 (step 6). In the present embodiment, the prefix assignment response message is a router advertisement message (Router Advertisement) including a prefix and a lifetime.

  In the present embodiment, the prefix distribution device 20 may include the terminal identification information of the terminal device 10 that is the transmission source of the prefix assignment request in the prefix assignment response message. Thus, when a plurality of terminal devices receive the prefix assignment response message, each terminal device can identify the prefix assignment response message including the terminal identification information that matches the terminal identification information of itself as being addressed to the terminal device. The prefix and lifetime included in the prefix assignment response message addressed to itself can be set in its own terminal device.

  After Step 6 in FIG. 4, the prefix assignment response message receiving unit 14 of the terminal device 10 receives the prefix assignment response message including the prefix and lifetime, and the prefix and lifetime included in the prefix assignment response message. Is stored in the setting information storage unit 17 (step 7).

  Subsequently, the IPv6 address generation unit 15 reads the prefix included in the prefix assignment response message from the setting information storage unit 17 and reads the interface ID generated by the interface ID generation unit 12 from the setting information storage unit 17. The IPv6 address is generated by combining the prefix and the interface ID, and stored in the setting information storage unit 17 (step 8).

  The IPv6 address and lifetime stored in the setting information storage unit 17 are used for subsequent data communication by the terminal device 10 and the like.

(Modification)
By connecting the terminal device 10 and a home appliance (TV, air conditioner, refrigerator, or other product) via a home network (wired or wireless), the home appliance communicates with the communication network 30 via the terminal device 10. The IPv6 address generation process in the case of performing will be described as a modification of the present embodiment. Note that the function described in this modification may be provided in addition to the basic function using the additional information described above.

  The functional block diagram of the terminal device 10 and the household appliance 50 in this modification is shown in FIG. As shown in FIG. 8, the terminal device 10 in this example is provided with a home appliance communication unit 18 for communicating with the home appliance 50 and the point that product information is used as additional information is shown in FIG. 2. And different. The home appliance 50 includes a main body 51 having an original function of a home appliance, a terminal device communication unit 52, a product information acquisition unit 53, and a product information storage unit 54.

  The terminal device communication unit 52 is a functional unit for communicating with the terminal device 10. The product information storage unit 54 stores, as product information, for example, model information of the home appliance 50, capability information of the home appliance 50, and the like. The product information is information that plays the same role as the additional information in the terminal device 10 and the prefix distribution device 20 described above. That is, in this example, product information is used as the additional information described above.

  The product information acquisition unit 53 acquires product information from the identification information storage unit 54 in response to receiving a product information acquisition request from the terminal device 10, and returns the product information to the terminal device 10 as a product information acquisition response. Part.

  In this example, the functional configuration of the prefix distribution apparatus 20 is the same as that shown in FIG.

  In the present modification, processing until the terminal device 10 generates an interface ID will be described with reference to FIG. The processing until the IPv6 address is generated after the terminal device 10 generates the interface ID is the same as the processing described in FIG.

  9, the interface ID generation unit 12 of the terminal device 10 transmits a product information acquisition request to the home appliance 50 (Step 11).

  In the home appliance 50 that has received the product information acquisition request, the product information acquisition unit 53 acquires product information from the identification information storage unit 54 (step 12). And the product information acquisition part 53 transmits the acquired product information to the terminal device 10 as a product information acquisition request response (step 13).

  In the terminal device 10 that has received the product information, the interface ID generation unit 12 acquires the product information, reads the terminal identification information from the terminal information storage unit 16, and generates a 64-bit interface ID by connecting these pieces of information. (Step 14). Thereafter, an IPv6 address is generated in the terminal device 10 in the same manner as the processing shown in FIG.

  In addition, in a modification, the apparatus connected with the terminal device 10 is not necessarily restricted to household appliances. Other devices that are not home appliances may be connected as long as the devices can implement the functional processing illustrated in FIGS. 8 and 9. Devices connected to the terminal device 10 can be called information devices including home appliances.

  The present invention is not limited to the above-described embodiments, and various modifications and applications are possible within the scope of the claims.

DESCRIPTION OF SYMBOLS 10 Terminal apparatus 11 Wireless communication part 12 Interface ID production | generation part 13 Prefix assignment request message transmission part 14 Prefix assignment response message reception part 15 IPv6 address generation part 16 Terminal information storage part 17 Setting information storage part 18 Versus home appliance communication part 20 Prefix distribution Device 21 Network communication unit 22 Prefix assignment request message reception unit 23 Prefix information acquisition unit 24 Prefix assignment response message transmission unit 25 Prefix information storage unit 30 Communication network 40 Base station 50 Home appliance 51 Main unit 52 Terminal device communication unit 53 Product information Acquisition unit 54 Product information storage unit

Claims (9)

A terminal device that generates an IPv6 address,
Terminal information storage means for storing terminal identification information other than the MAC address of the terminal device, terminal type, location information, and additional information that is terminal capability ;
Interface ID generation means for reading out the terminal identification information and the additional information from the terminal information storage means, and generating an interface ID including the terminal identification information and additional information;
Prefix assignment request message transmission means for transmitting a prefix assignment request message including the interface ID to a prefix distribution apparatus connected to the terminal device via a communication network;
A prefix assignment response message receiving means for receiving a prefix assignment response message including a prefix from the prefix distribution apparatus and obtaining a prefix from the prefix assignment response message;
With said prefix and an address generating means for generating an IPv6 address from said interface ID generated by the interface ID generator,
The prefix assignment response message includes parameter information corresponding to the additional information, and obtains the parameter information from the prefix assignment response message . The terminal device according to claim 1 , wherein the parameter information is a lifetime of the prefix. The terminal device comprises a communication means for communicating with information equipment,
The interface ID generation unit acquires product information of the information device from the information device via the communication unit, and generates the interface ID by using the product information instead of the additional information. The terminal device according to claim 1 or 2 , characterized in that A prefix distribution device that distributes a prefix of an IPv6 address to a terminal device via a communication network,
Prefix information storage means for storing the terminal ID information other than the MAC address, the interface ID including the terminal type, location information, or additional information that is terminal capability, and a prefix in association with each other;
A prefix assignment request message receiving means for receiving a prefix assignment request message including an interface ID from the terminal device and obtaining the interface ID from the prefix assignment request message;
By searching the prefix information storage unit based on the interface ID, a prefix information acquisition unit that acquires a prefix corresponding to the interface ID;
A prefix distribution response device comprising: a prefix allocation response message transmission unit configured to transmit a prefix allocation response message including the prefix to the terminal device. The prefix information storage means stores parameter information in association with additional information,
The prefix information acquisition unit acquires parameter information corresponding to additional information included in the interface ID from the prefix information storage unit,
5. The prefix distribution apparatus according to claim 4 , wherein the prefix assignment response message transmission unit transmits a prefix assignment response message including the parameter information in addition to the prefix to the terminal device. An IPv6 address generation system configured by connecting a terminal device and a prefix distribution device via a communication network,
The terminal device
Terminal information storage means for storing terminal identification information other than the MAC address of the terminal device, terminal type, location information, or additional information that is terminal capability ;
Interface ID generation means for reading out the terminal identification information and the additional information from the terminal information storage means, and generating an interface ID including the terminal identification information and additional information;
Prefix assignment request message transmission means for transmitting a prefix assignment request message including the interface ID to the prefix distribution device;
A prefix assignment response message receiving means for receiving a prefix assignment response message including a prefix from the prefix distribution apparatus and obtaining a prefix from the prefix assignment response message;
Address generation means for generating an IPv6 address from the prefix and the interface ID generated by the interface ID generation means,
The prefix distribution device is:
Prefix information storage means for storing the terminal ID information other than the MAC address, the interface ID including the terminal type, location information, or additional information that is terminal capability, and a prefix in association with each other;
A prefix assignment request message receiving means for receiving the prefix assignment request message from the terminal device and obtaining the interface ID from the prefix assignment request message;
By searching the prefix information storage unit based on the interface ID, a prefix information acquisition unit that acquires a prefix corresponding to the interface ID;
An IPv6 address generation system comprising: prefix assignment response message transmission means for transmitting the prefix assignment response message including the prefix to the terminal device. The prefix information storage means in the prefix distribution device stores parameter information in association with additional information,
The prefix information acquisition unit acquires parameter information corresponding to additional information included in the interface ID from the prefix information storage unit,
The prefix assignment response message transmission means transmits a prefix assignment response message including the parameter information in addition to the prefix to the terminal device,
The IPv6 address generation system according to claim 6 , wherein the terminal device acquires the parameter information from the prefix assignment response message. An IPv6 address generation method in an IPv6 address generation system configured by connecting a terminal device and a prefix distribution device via a communication network,
The terminal device includes terminal information storage means for storing terminal identification information other than the MAC address of the terminal device, terminal type, location information, or additional information that is terminal capability, and the prefix distribution device includes: It comprises a prefix information storage means for storing an interface ID consisting of terminal identification information other than the MAC address , terminal type, location information, or additional information that is terminal capability, and a prefix in association with each other,
An interface ID generating step in which the terminal device reads the terminal identification information and the additional information from the terminal information storage unit, and generates an interface ID including the terminal identification information and the additional information;
A prefix assignment request message transmission step in which the terminal device transmits a prefix assignment request message including the interface ID to the prefix distribution device;
The prefix distribution device receives the prefix assignment request message and obtains the interface ID from the prefix assignment request message;
A prefix information acquisition step in which the prefix distribution device acquires the prefix corresponding to the interface ID by searching the prefix information storage unit based on the interface ID;
A prefix assignment response message transmission step in which the prefix distribution device transmits a prefix assignment response message including the prefix to the terminal device;
The terminal device receives the prefix assignment response message and obtains a prefix from the prefix assignment response message;
The terminal device generates an IPv6 address from the prefix and the interface ID generated by the interface ID generation step; and
An IPv6 address generation method comprising: The prefix information storage means in the prefix distribution device stores parameter information in association with additional information,
In the prefix information acquisition step, the prefix distribution device acquires parameter information corresponding to additional information included in the interface ID from the prefix information storage unit,
In the prefix assignment response message transmission step, the prefix distribution device transmits a prefix assignment response message including the parameter information in addition to the prefix to the terminal device,
The IPv6 address generation method according to claim 8 , wherein the terminal device acquires the parameter information from the prefix assignment response message.

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