JP2007164516A - Communication terminal and communication system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a communication terminal and a communication system for allowing a user to automatically select an address without being concerned with it when a plurality of addresses are registered to an address book in a network environment where IPv6 is available. <P>SOLUTION: In one of the address lists of a communication terminal on the side of transmission, mail addresses or addresses of file transfer corresponding to a plurality of respective IP addresses set to the equipment on the side of reception is set. On the basis of each of transmitted data, a various addresses in one address book stored with the plurality of addresses are compared with addresses based on the transmitted data on the side of transmission by a longest-match system and the data are automatically transmitted to the longest-match address. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a communication terminal device and a communication system having file transfer functions such as mail transmission and FTP / SMB in a network environment where IPv6 can be used, and particularly when a plurality of destinations are registered in an address book. The present invention relates to a communication terminal apparatus and a communication system that automatically select an address without the user's awareness.

  The Internet usage has shifted from dial-up connection to broadband continuous connection, and this always-connected Internet environment has become widespread. In addition, what is connected to the Internet only with a computer has recently become possible to connect with a mobile phone or an Internet phone (VoIP: Voice over IP).

As described above, with the realization of a ubiquitous environment that is being expanded to various uses, the depletion of IP (Internet Protocol) addresses has become a problem. The IP that is currently used on a daily basis is called IPv4 (Internet Protocol version 4), and the address space is 2 ³² = about 4.3 billion.

  Since the world's population is about 6 billion, one IP address cannot be assigned to each person, and even considering that Internet technology is applied to home appliances and automobiles, etc. The IP address depletion problem is an issue that should be solved immediately.

Therefore, there has been a shift from the conventional IPv4 to IPv6 (Internet Protocol version 6) which is the next generation IP. The IPv6 is space IP address has been enlarged in 2 ^128, so that it has two ^96-fold of the address space in IPv4. This enormous address space is said to be the greatest merit in IPv6.

  For example, in the conventional IPv4, a private IP address is used in a LAN (Local Area Network) environment in a house or at home in order to reduce the use of the IP address as a countermeasure against the exhaustion of the IP address described above. A global IP address is used when connecting to the outside (outside the LAN environment). When IP communication is performed between a private IP address and a global IP address, the IP address is converted using NAT (National Address Translation) to associate the IP address with each other.

  However, since the address space is almost infinite in IPv6, for example, it is possible to have a plurality of IP addresses for one terminal, and a private IP address that saves use of the IP address, or NAT Can be eliminated.

  Here, a mechanism for distributing IP addresses and prefixes in IPv6 defined by the IETF (Internet Engineering Task Force) will be described.

  The IPv6 128-bit address field is composed of two parts, a high-order 64-bit network prefix part and a low-order 64-bit interface ID part. The network prefix unit corresponds to a network unit in IPv4, and can configure addresses hierarchically using an aggregated address structure. The interface ID part corresponds to a host part in IPv4, and has a fixed length of 64 bits.

  The higher-order bits of the network prefix part are the IP address part in terms of the length of the IP address and the number of bits, and this is called a prefix. This prefix is given to a subscriber by, for example, an ISP (Internet Service Provider). Further, the length indicated by the number of bits, that is, the prefix length is variable.

  Also, the ISP router used for IP connection with the above-mentioned subscriber is called a PE (Provider Edge) router, and the router at the Internet connection in the office or home is called a CPE (Customer Premises Equipment) router. This CPE router generates and manages an address following the prefix given by the server.

  The user terminal connected to the CPE router is given an address corresponding to the upper 64 bits of the network prefix part. Each user terminal generates a 128-bit IPv6 address by adding the lower 64 bits of the above-described interface ID part as its own identifier to this assigned address.

  In addition, by assigning prefix information to the CPE router using DHCP (Dynamic Host Configuration Protocol), it is not necessary to manually set the IP address to the user terminal. For the address corresponding to the upper 64 bits of the network prefix assigned from the CPE router to the user terminal, RA (Router Advertisement) is used as a standard specification of the IPv6 network address (prefix). This eliminates the need for the user of the user terminal to set an IP address for the user terminal.

  In the user terminal, EUI-64 (64-bit Extended Unique Identifier) may be used as the interface ID section. This is an address system defined by IEEE (Institute of Electrical and Electronics Engineers), which generates a 64-bit bit string from a 48-bit MAC address. Alternatively, a random number generation or the like may be used.

  These contents are disclosed in RFC (Request for Comments) which is a standard document defined by IETF (see Non-Patent Document 1). In addition, as the prior art having a plurality of IP addresses in a user terminal, the inventions disclosed in Patent Document 1 and Patent Document 2 are known.

Patent Document 1 discloses an invention that enables one magnetic disk device to be managed as a plurality of storage devices having different personalities. Further, Patent Document 2 discloses an invention in which one end terminal uses one application usage environment according to an IPv6 address.
JP-A-5-265914 Japanese Patent Laid-Open No. 2005-045472 IETF Request for Comments (http://www.ietf.org/rfc.html)

  As described above, in an IPv4 environment, in order to suppress the use of an IP address, a corporate network such as an in-house LAN or a home network in a home uses a private IP address and connects to the external Internet. NAT is used for associating a global IP address with a private IP address.

  On the other hand, in an IPv6 environment where the address space is almost infinite, a private IP address and NAT are not required, and a single terminal can have a plurality of IP addresses. From such a situation, a plurality of addresses are set for one terminal, and it takes time to select one of the plurality of addresses from the transmission side.

  In addition, since a single terminal can have a plurality of IP addresses, there are a plurality of transmission routes corresponding to a plurality of addresses as transmission destinations to one terminal. Of these transmission routes, it is preferable to use a transmission route (IP address) that can transmit data more efficiently according to transmission data. However, as described above, selecting the most efficient address from a plurality of IP addresses according to the data to be transmitted is a troublesome work for the user.

  Therefore, the present invention provides a communication terminal device and a communication system capable of automatically selecting an address and transmitting it to a transmission destination without being conscious of the user when a plurality of destinations are registered in the address book. The purpose is that.

  In order to achieve the above object, the invention described in claim 1 is a communication terminal device in which a transmission-side communication terminal device and a reception-side device can be connected to each other via a network, A mail address corresponding to each IP address is stored as one address list, and the address list is set as a transmission destination of the communication terminal device.

  According to a second aspect of the present invention, in the communication terminal device according to the first aspect, the IP address corresponds to IPv6.

  According to a third aspect of the present invention, in the communication terminal device according to the first or second aspect, the destination is set by comparing the IP address of the mail server on the communication terminal device side with the IP address of the mail address. It is characterized in that it is set by comparison with a method.

  According to a fourth aspect of the present invention, in the communication terminal device according to the first or second aspect, the setting of the transmission destination includes a first priority means for setting a priority of the transmission destination by the user, and the transmission destination Is transmitted on the basis of the priority order when it has a plurality of mail addresses.

  The invention according to claim 5 is a communication terminal device in which the communication terminal device on the transmission side and the device on the reception side can be connected to each other via a network, and each transfer corresponds to each of a plurality of IP addresses of the device. The address of the file is stored as one address list, and the address list is set as a transmission destination of the communication terminal device.

  According to a sixth aspect of the present invention, in the communication terminal device according to the fifth aspect, the transmission destination is set by using the default gateway IP address on the communication terminal device side and the IP address of the transfer file in a longest match method. And comparing and setting.

  According to a seventh aspect of the present invention, in the communication terminal device according to the fifth aspect, the setting of the transmission destination includes a second priority means for the user to set the priority of the transmission destination, and there are a plurality of transmission destinations. In the case of having the address of the transfer file, transmission is performed based on the priority order.

  The invention according to claim 8 is the communication terminal device according to claim 5, wherein the transmission destination is set by comparing the IP address of the communication terminal device side with the IP address of the transfer file by the longest match method. It is characterized by setting.

  According to a ninth aspect of the present invention, in the communication terminal device according to the fifth aspect, the setting of the transmission destination has a third priority means for the user to set the priority of the transmission destination, and there are a plurality of transmission destinations. In the case of having the address of the transfer file, transmission is performed based on the priority order.

  In the communication terminal device according to any one of claims 3, 6, and 8, when the transmission to the transmission destination fails, the invention according to claim 10 is a result of comparison using the longest match method. Then, the transmission is performed to the transmission destination having the longest matching address.

  The invention according to claim 11 is the communication terminal device according to any one of claims 4, 7, and 9, and when the transmission to the transmission destination fails, the priority is given next based on the priority order. It transmits to the transmission destination with high order, It is characterized by the above-mentioned.

  According to a twelfth aspect of the present invention, in the communication terminal device according to any one of the first to eleventh aspects, the communication terminal apparatus includes means for displaying information related to transmission before transmission.

  A thirteenth aspect of the present invention is the communication terminal device according to any one of the first to eleventh aspects, further comprising means for displaying and outputting a transmission result relating to transmission.

  The invention according to claim 14 is a communication system in which a transmission-side communication terminal device and a reception-side device can be connected to each other via a network, and each device has a plurality of IP addresses and IP addresses. The communication terminal device has storage means for storing a plurality of unique addresses that are transmission destinations of the device as one address list, and the transmission destination to the device is determined based on the address list. It is characterized by setting.

  According to a fifteenth aspect of the present invention, in the communication system according to the fourteenth aspect, the IP address corresponds to IPv6.

  According to a sixteenth aspect of the present invention, in the communication system according to the fourteenth or fifteenth aspect, the destination is set by using the longest match method in which the IP address of the mail server on the communication terminal side and the IP address of the mail address are It is characterized in that it is set by comparison.

  According to a seventeenth aspect of the present invention, in the communication system according to the fourteenth or fifteenth aspect, the transmission destination is set by the user having a first priority order unit for setting the priority of the transmission destination. When there are a plurality of mail addresses, transmission is performed based on the priority order.

  The invention according to claim 18 is a communication system in which a transmission-side communication terminal device and a reception-side device can be connected to each other via a network, and each transfer file corresponds to each of a plurality of IP addresses of the device. Are stored as one address list, and the address list is set as a transmission destination of the communication terminal device.

  According to a nineteenth aspect of the present invention, in the communication system according to the eighteenth aspect, the transmission destination is set by using a longest match method in which the IP address of the default gateway on the communication terminal device side and the IP address of the transfer file are set. It is characterized by setting in comparison.

  According to a twentieth aspect of the present invention, in the communication system according to the eighteenth aspect of the present invention, the setting of the transmission destination has a second priority means for the user to set the priority of the transmission destination, and the transmission destination has a plurality of transmission destinations. When it has the address of the transfer file, it is transmitted based on the priority order.

  The invention according to claim 21 is the communication system according to claim 18, wherein the transmission destination is set by comparing the IP address on the communication terminal device side with the IP address of the transfer file by the longest match method. It is characterized by setting.

  According to a twenty-second aspect of the present invention, in the communication system according to the eighteenth aspect, the setting of the transmission destination has a third priority means for the user to set the priority of the transmission destination, and the transmission destination has a plurality of transmission destinations. When it has the address of the transfer file, it is transmitted based on the priority order.

  In the communication system according to any one of claims 16, 19, and 21, when the transmission to the transmission destination fails, as a result of comparison by the longest match method, Next, the transmission is performed to the transmission destination having the longest matching address.

  According to a twenty-fourth aspect of the present invention, in the communication system according to any one of the seventeenth, twentieth, and twenty-second aspects, when transmission to a transmission destination fails, the priority order is next based on the priority order. It is characterized by transmitting to a high transmission destination.

  The invention according to claim 25 is the communication system according to any one of claims 14 to 24, further comprising means for displaying information related to transmission before transmission.

  According to a twenty-sixth aspect of the present invention, there is provided the communication system according to any one of the fourteenth to twenty-fourth aspects, further comprising means for displaying and outputting a transmission result relating to transmission.

  As described above, according to the communication terminal device and the communication system of the present invention, when a plurality of destinations are registered in the address book, the address is automatically selected and transmitted to the transmission destination without being conscious of the user. be able to.

Next, the communication terminal device and the communication system of this embodiment will be described with reference to the drawings. In addition, this embodiment is not limited to what is described below, A various change is possible in the range which does not deviate from the meaning.
FIG. 1 is a block diagram illustrating a system configuration in a communication terminal apparatus and a communication system according to the present embodiment.

  The communication terminal device of this embodiment is usually configured as a network system as shown in FIG. As shown in FIG. 1, for example, a plurality of communication terminal devices such as PCs 1 and 2, servers, printers, and multifunction devices are connected to each other via a network.

FIG. 2 is a block diagram showing the configuration of the communication terminal apparatus according to the present embodiment.
The communication terminal apparatus according to the present embodiment includes a CPU 11, a ROM 12, a RAM 13, an operation display unit 14, an I / O (Input-Output) unit 15, and a network interface (I / F) 16.

  The CPU 11 is a central processing unit that executes a program written in the ROM 12 and controls each unit of the communication terminal device. The ROM 12 is a read-only memory in which a program for the CPU 11 to control each unit of the communication terminal device and fixed data used for control are stored. The RAM 13 is a random access memory used when a work area for executing a program for controlling each part of the communication terminal device or data is expanded. In addition, various data in the terminal such as an address book may be stored, and data sent from an external terminal may be temporarily stored.

  The operation display unit 14 includes an operation key for a user to set a device and the like, and a display unit such as a liquid crystal display for displaying an operation state and a message of the device to the user. The I / O unit 15 is composed of an input / output port and mediates connection with an external device. The network I / F 16 connects each PC and a printer via a network.

  Next, FIG. 3 is a diagram schematically showing an address book of the communication terminal device of the present embodiment. In this figure, the source address book A corresponds to the destination apparatus A.

  As shown in FIG. 3, a plurality of mail addresses, for example, mail address 1, mail address 2, mail address 3,..., Mail address N are set for one address book A. A plurality of mail addresses corresponding to the device A are set in the mobile communication terminal serving as the transmission source at the time of the initial connection with the device A described above.

  These multiple mail addresses are like a “box” and are stored together as a single piece of data. Further, not only mail addresses but also transfer destination addresses of a plurality of files are stored together as one data in a “box” in the same manner. When this “box” becomes a so-called one-touch address and communication is performed from the transmission source device to the device A, for example, by pressing (clicking) a button corresponding to the address book A, a plurality of addresses can be selected. The address most suitable for transmission can be selected from and transmitted.

  Since IPv6 has a large address space as described above, a plurality of addresses can be stored almost infinitely. Therefore, it is possible to store a plurality of e-mail addresses, a plurality of transfer files, and the like in one address book.

Next, mail transmission in the communication terminal device and the communication system of the present embodiment will be described with reference to the drawings.
FIG. 4 is a diagram showing a normal mail transmission operation in the communication terminal device of the present embodiment. In FIG. 4, it is assumed that three addresses A, B, and C, which are a plurality of mail addresses, are registered in one address book.

  First, the respective IP addresses are acquired from the domain names of the mail addresses A, B, and C (step S101). Next, the IP address of this mail server is acquired from the setting of the SMTP (Simple Mail Transfer Protocol) mail server on the transmission side (step S102).

  Here, the IP addresses of A, B, and C acquired in step S101 are compared with the IP address of the SMTP mail server acquired in step S102 (step S103). By this comparison, the IP address that is the closest to the IP address of the SMTP mail server is searched from the IP addresses of the mails A, B, and C.

  This search method is called a longest match method, which compares a plurality of source address candidates with a destination address and selects the longest match. The mail is transmitted to the mail address having the IP address searched by this method (step S104). For example, as a result of the search, if the IP address of the mail address A is the longest match with the IP address of the SMTP mail server, the mail is transmitted to A.

  As described above, according to this embodiment, even when a plurality of destinations are registered in one address book, it is possible to automatically select an address and send an email without being conscious of the user. It becomes.

In this mail transmission operation, the transmission destination can be set not by the setting of the SMTP mail server on the transmission side but by the priority order of addresses set by the user.
FIG. 5 is a diagram showing a mail transmission operation based on the priority set by the user in the communication terminal device and the communication system of the present embodiment. In this figure, it is assumed that a plurality of mail addresses A, B, and C are registered in one address book.

  First, the respective IP addresses are acquired from the domain names in the mail addresses A, B, and C (step S201). Next, an address designated based on the priority set by the user is acquired (step S202).

  Here, the IP addresses A, B, and C acquired in step S201 are compared with the user-set addresses acquired in step S202 (step S203). Then, by this comparison, the IP addresses of the mails A, B, and C are searched for those closest to the address designated by the user by the above-mentioned longest match method. Then, the mail is transmitted to the mail address having the searched address (step S204).

Next, the file transfer operation in the communication terminal device of this embodiment will be described.
According to the communication terminal apparatus of this embodiment, when a plurality of destinations are registered in the address book, not only mail transmission but also file transfer can be performed in the same manner.

  FIG. 6 is a diagram illustrating a normal file transfer operation in the communication terminal device and the communication system according to the present embodiment. In this figure, similarly to FIGS. 4 and 5 described above, it is assumed that a plurality of file transfer addresses D, E, and F are registered in one address book.

  First, the respective IP addresses are acquired from the file transfer addresses D, E, and F (step S301). Next, the IP address of the default gateway set in the device on the transmission side is acquired (step S302).

  Here, each IP address of D, E, and F acquired in step S301 is compared with the IP address of the default gateway acquired in step S302 (step S303). By this comparison, the IP address of each mail of D, E, F is searched for the one closest to the IP address of the default gateway by the above-mentioned longest match method. As a result, the file is transferred to the file transfer address having the searched IP address (step S304).

  As described above, according to this embodiment, even when a plurality of destinations are registered in one address book, it is possible to automatically select an address and perform file transfer without the user being aware of it. It becomes possible.

  Further, in this mail transmission operation, the file transfer destination can be set not by the IP address of the default gateway set for the device on the transmission side but by the priority order of the addresses set by the user.

  FIG. 7 is a diagram showing a file transfer operation based on the priority set by the user in the communication terminal device and the communication system of the present embodiment. In this figure, it is assumed that a plurality of file transfer addresses D, E, and F are registered in one address book.

  First, the respective IP addresses are obtained from the file transfer addresses D, E, and F (step S401). Next, an address designated based on the priority set by the user is acquired (step S402).

  Here, the IP addresses A, B, and C acquired in step S401 are compared with the user-set addresses acquired in step S402 (step S403). Then, by this comparison, the IP addresses of the mails A, B, and C are searched for those closest to the address designated by the user by the above-mentioned longest match method. Then, the file is transferred to the file transfer address having the searched address (step S404).

  In this example, the IP address of the default gateway is used to detect and select the destination, but the IP address set in the source device is directly compared with the IP address of the destination device. Then, it may be detected and selected. The operation at this time is the same as the file transfer operation by the default gateway.

  As described above, according to the communication terminal device and the communication system of the present embodiment, even when a plurality of destinations are registered in one address book, an address is automatically selected without the user being aware of it, and mail transmission is performed. And file transfer.

  In this embodiment, as the network environment, both the transmission source device and the transmission destination device have been described as being IPv6 compatible. However, it is only necessary that each device is compatible with IPv6, and only IPv6 or IPv6 and IPv4 can be used. It is possible to correspond to the dual stack system.

It is the schematic which shows the system configuration | structure of the communication terminal device of this embodiment. It is a block diagram which shows the structure of the communication terminal device of this embodiment. It is a figure which shows an example of the address book of the communication terminal device of this embodiment. It is a flowchart which shows an example of the mail transmission operation | movement of the communication terminal device of this embodiment. It is a flowchart which shows another example of the mail transmission operation | movement of the communication terminal device of this embodiment. It is a flowchart which shows an example of the file transfer operation | movement of the communication terminal device of this embodiment. It is a flowchart which shows another example of the file transfer operation | movement of the communication terminal device of this embodiment.

Explanation of symbols

11 CPU
12 ROM
13 RAM
14 Operation display section 15 I / O section 16 Network I / F

Claims (26)

A communication terminal device in which a transmission side communication terminal device and a reception side device are mutually connectable via a network,
A communication terminal device, wherein a mail address corresponding to each of a plurality of IP addresses of the device is stored as one address list, and the address list is set as a transmission destination of the communication terminal device.   The communication terminal apparatus according to claim 1, wherein the IP address corresponds to IPv6. The destination setting is
The communication terminal apparatus according to claim 1 or 2, wherein the IP address of the mail server on the communication terminal apparatus side and the IP address of the mail address are set by comparison using a longest match method. . The setting of the transmission destination has a first priority means for setting a priority of the transmission destination by the user,
The communication terminal device according to claim 1, wherein when the transmission destination has a plurality of the mail addresses, transmission is performed based on the priority order. A communication terminal device in which a transmission side communication terminal device and a reception side device are mutually connectable via a network,
An address of a transfer file corresponding to each of a plurality of IP addresses of the device is stored as one address list, and the address list is set as a transmission destination of the communication terminal device. The destination setting is
6. The communication terminal apparatus according to claim 5, wherein the IP address of the default gateway on the communication terminal apparatus side and the IP address of the transfer file are set by comparison using a longest match method. The setting of the transmission destination has a second priority means for the user to set the priority of the transmission destination,
6. The communication terminal apparatus according to claim 5, wherein when the transmission destination has a plurality of transfer file addresses, transmission is performed based on the priority order. The destination setting is
6. The communication terminal device according to claim 5, wherein the IP address on the communication terminal device side and the IP address of the transfer file are set by comparison using a longest match method. The setting of the transmission destination has a third priority order means for setting the priority of the transmission destination by the user,
6. The communication terminal apparatus according to claim 5, wherein when the transmission destination has a plurality of transfer file addresses, transmission is performed based on the priority order.   9. When transmission to the transmission destination fails, as a result of comparison by the longest match method, transmission is performed to a transmission destination having the next longest matching address. The communication terminal device according to any one of claims.   10. The transmission device according to claim 4, wherein, when transmission to the transmission destination fails, transmission is performed to a transmission destination having the next highest priority order based on the priority order. Communication terminal device.   The communication terminal apparatus according to any one of claims 1 to 11, further comprising means for displaying information related to the transmission before the transmission.   The communication terminal apparatus according to any one of claims 1 to 11, further comprising means for displaying and outputting a transmission result relating to the transmission. A communication system in which a communication terminal device on a transmission side and a device on a reception side can be connected to each other via a network,
The equipment is
A plurality of IP addresses and a unique address for each IP address;
The communication terminal device
Storing means for storing a plurality of the unique addresses as transmission destinations of the device as one address list;
A communication system, wherein the transmission destination to the device is set based on the address list.   The communication system according to claim 14, wherein the IP address corresponds to IPv6. The destination setting is
The communication system according to claim 14 or 15, wherein the IP address of the mail server on the communication terminal device side and the IP address of the mail address are set by comparison using a longest match method. The setting of the transmission destination has a first priority means for setting a priority of the transmission destination by the user,
The communication system according to claim 14 or 15, wherein when the transmission destination has a plurality of the mail addresses, transmission is performed based on the priority. A communication system in which a communication terminal device on a transmission side and a device on a reception side can be connected to each other via a network,
A communication system, wherein addresses of transfer files respectively corresponding to a plurality of IP addresses of the device are stored as one address list, and the address list is set as a transmission destination of the communication terminal device. The destination setting is
19. The communication system according to claim 18, wherein the IP address of the default gateway on the communication terminal device side and the IP address of the transfer file are set by comparison using a longest match method. The setting of the transmission destination has a second priority means for the user to set the priority of the transmission destination,
19. The communication system according to claim 18, wherein when the transmission destination has a plurality of addresses of the transfer files, transmission is performed based on the priority order. The destination setting is
19. The communication system according to claim 18, wherein the IP address on the communication terminal device side and the IP address of the transfer file are set by comparison using a longest match method. The setting of the transmission destination has a third priority order means for setting the priority of the transmission destination by the user,
19. The communication system according to claim 18, wherein when the transmission destination has a plurality of addresses of the transfer files, transmission is performed based on the priority order.   The transmission according to claim 16, 19, or 21, wherein, when transmission to the transmission destination fails, transmission is performed to a transmission destination having the next longest matching address as a result of comparison by the longest match method. The communication system according to any one of the above.   23. The transmission according to claim 17, wherein when transmission to the transmission destination fails, transmission is performed to a transmission destination having the next highest priority based on the priority. Communication system.   The communication system according to any one of claims 14 to 24, further comprising means for displaying information related to the transmission before transmission.   The communication system according to any one of claims 14 to 24, further comprising means for displaying and outputting a transmission result relating to the transmission.

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