JP6398634B2 - Communication device, communication system, determination method and program in communication device - Google Patents

Description

  The present invention relates to a communication apparatus, a communication system, a determination method in the communication apparatus, and a program capable of data communication with an information processing apparatus having a WAN-side interface by communication means.

  As an example of an information processing apparatus having a WAN (Wide Area Network) side interface, a communication apparatus such as a computer or a smartphone is connected, and a router for connecting the communication apparatus to the Internet is exemplified. Usually, such a router needs to perform a predetermined communication setting for connecting to the Internet when it is first activated. For example, when connecting to the Internet from a router via an Internet Service Provider (ISP) by PPPoE (Point-to-Point Protocol Over Ethernet (Ethernet is a registered trademark)), it is provided by the ISP. The user ID and password must be set in the router. As an example of such a technique capable of easily performing predetermined communication settings for a communication apparatus, the present applicant has proposed a technique as shown in Patent Document 1.

Japanese Patent No. 4592342 JP 2013-26974 A

  By the way, the above-described conventional technology may not operate effectively under some conditions. First, when the communication device is not connected to the router, the router cannot receive the communication setting instruction transmitted from the communication device, so that the communication setting operation by the router does not start. Next, the setting that is applied when multiple routers are installed in the same LAN (Local Area Network) and that does not perform the routing function of communication packets for the router is closest to the WAN (on the upstream side) This is a case where this router does not perform the communication setting operation because it is applied to the router. Furthermore, this is a case where the target router does not have a technology that can easily set communication.

  However, it is difficult to determine whether or not the router is in a state that meets the above-described conditions from a communication device that transmits an instruction to perform communication setting to the router and causes the router to perform communication setting. Therefore, when the router does not perform the communication setting operation, it may be difficult for the user of the communication device to grasp the cause and take an appropriate action.

  A technique for notifying that automatic setting means for automatically setting a connection with an external network is not effective has been proposed (see, for example, Patent Document 2). In the case of not performing, it is difficult to grasp the cause and take appropriate measures.

  The present invention has been made in view of the above-described problems, and provides a communication device, a communication system, a determination method in the communication device, and a program capable of appropriately starting a communication setting operation for connecting the information processing device to the Internet. Is one of its purposes.

  The present invention is applied to a communication apparatus that is located in the same network and can perform data communication with an information processing apparatus having a WAN side interface by communication means. A network address acquisition unit that acquires at least one of a default gateway address and a DNS server address in the network to which the communication device belongs; and a specific protocol is transmitted to the information processing device, and the LAN side of the information processing device An identification information acquisition unit that receives identification information including an IP address, an identification information of an information processing device acquired by the identification information acquisition unit, and at least one of a default gateway address and a DNS server address acquired by a network address acquisition unit If the information processing apparatus is provided with a setting unit for performing a setting procedure when the information processing apparatus connects to the Internet via the WAN side interface, whether or not the setting unit is operable is determined. By providing a discriminator that discriminates Solves at least one of the problems described above.

  Here, the network address acquisition unit acquires the LAN-side IP address assigned to the communication device, and uses the acquired LAN-side IP address and the subnet mask in the network to which the communication device belongs, in the network to which the communication device belongs. It is preferable to obtain the address of the default gateway. In addition, the determination unit sets the information processing device to the setting unit based on whether the LAN-side IP address of the information processing device acquired by the identification information acquisition unit matches the address of the default gateway acquired by the network address acquisition unit. It is preferable to determine whether or not the setting unit is operable.

  Further, the determination unit preferably determines whether or not the communication device is connected to the information processing device via the communication unit based on whether or not the identification information acquisition unit has received the identification information of the information processing device. .

  In addition, when a URI transmission / reception unit that transmits a URI to the information processing apparatus and accepts the reply is provided, the determination unit determines whether the reply received by the URI transmission / reception unit includes the WAN-side IP address, and the URI. It is preferable to determine whether or not the information processing apparatus is connected to the Internet based on at least one of whether or not the transmission / reception unit has accepted the reply.

  Further, the determination unit may determine whether or not there is an information processing device that operates as a DHCP server, depending on whether or not the LAN-side IP address of the communication device acquired by the network address acquisition unit is a link local address. preferable.

  Furthermore, it is preferable that the communication apparatus can perform data communication with the information processing apparatus by wireless communication means.

  In addition, the present invention includes a communication device and an information processing device having a WAN-side interface, and the communication device and the information processing device are communication systems capable of performing data communication with each other by communication means in the same network. Applied. Then, a network protocol acquisition unit that acquires at least one of a default gateway address and a DNS server address in the network to which the communication device belongs, and a specific protocol are transmitted to the information processing device. An identification information acquisition unit that accepts identification information including the LAN-side IP address of the device, an identification information of the information processing device acquired by the identification information acquisition unit, a default gateway address and a DNS server address acquired by the network address acquisition unit If the information processing apparatus is provided with a setting unit for performing a setting procedure when the information processing apparatus connects to the Internet via the WAN side interface based on at least one of the information processing apparatuses, the setting unit is operable. A discriminator that discriminates whether or not The Rukoto solves at least one of the problems described above.

  Furthermore, the present invention is applied to a determination method in a communication apparatus that is located in the same network and can perform data communication with an information processing apparatus having a WAN-side interface by communication means. Then, at least one of a default gateway address and a DNS server address in the network to which the communication device belongs is acquired, a specific protocol is transmitted to the information processing device, and the LAN side IP address of this information processing device is included. When the information processing apparatus connects to the Internet via the WAN side interface based on the information processing apparatus identification information and at least one of the address of the default gateway and the address of the DNS server. In the case where a setting unit for performing a setting procedure is provided, at least one of the above-described problems is solved by determining whether or not the setting unit is operable.

  The present invention is applied to a program executed by a computer that is located in the same network and can perform data communication with an information processing apparatus having a WAN-side interface by communication means. When this program is executed by a computer, the computer is identified with respect to the information processing device and a network address acquisition unit that acquires at least one of a default gateway address and a DNS server address in the network to which the communication device belongs. The identification information acquisition unit that receives the identification information including the LAN-side IP address of the information processing device, the identification information of the information processing device acquired by the identification information acquisition unit, and the network address acquisition unit When the information processing apparatus is provided with a setting unit that performs a setting procedure when the information processing apparatus connects to the Internet via the WAN side interface based on at least one of the address of the default gateway and the address of the DNS server In By function as a discrimination section for the setting unit determines whether it is possible to operate, it has solved at least one of the problems described above.

  According to the present invention, it is possible to appropriately determine whether an information processing apparatus existing in a network includes a setting unit, and when the information processing device includes a setting unit, the communication setting operation by the setting unit can be appropriately started. . Accordingly, it is possible to realize a communication device, a communication system, a determination method in the communication device, and a program capable of appropriately starting a communication setting operation for connecting the information processing device to the Internet.

It is a figure which shows schematic structure of the communication system which is one Embodiment of this invention. It is a block diagram which shows schematic structure of the communication apparatus which comprises the communication system of one Embodiment. It is a block diagram which shows schematic structure of the router which comprises the communication system of one Embodiment. It is a functional block diagram which shows the function structure of the communication system of one Embodiment. It is a flowchart which shows an example of operation | movement of the communication apparatus of one Embodiment. It is a flowchart which shows an example of operation | movement of the communication apparatus of one Embodiment. It is a flowchart which shows an example of operation | movement of the communication apparatus of one Embodiment. It is a figure which shows an example of the display screen displayed on the communication apparatus of one Embodiment. It is a figure which shows an example of the display screen displayed on the communication apparatus of one Embodiment. It is a figure which shows an example of the display screen displayed on the communication apparatus of one Embodiment. It is a figure which shows an example of the display screen displayed on the communication apparatus of one Embodiment.

Embodiments of the present invention will be described below with reference to the drawings.
(One embodiment)
FIG. 1 is a diagram showing an outline of a communication system according to an embodiment of the present invention. In this figure, a communication system S according to an embodiment includes a communication device 1 and a router 2 as an information processing device.

  The communication device 1 is a so-called smartphone or the like, can perform a voice call through the base station 4 a and the mobile communication network 4, and can be connected to the Internet 5 through the mobile communication network 4. The communication device 1 also has a function as a wireless LAN client. The router 2 includes a WAN-side interface 230 (not shown in FIG. 1), and the WAN-side interface 230 is connected to the Internet 5 as a WAN, so that other information processing connected to the communication device 1 and the router 2 is performed. The communication between the device 6 and the Internet 5 is relayed. The router 2 has a function as a wireless LAN access point.

  The communication device 1 according to the present embodiment is disposed in the same wireless LAN communication area as the router 2, for example, at home. Accordingly, the communication device 1 can wirelessly communicate with other wireless LAN access points including the router 2 via the wireless LAN, while the router 2 communicates with other wireless terminals including the communication device 1 that is a wireless LAN client. Wireless communication is possible. As a result, in the communication system S of the present embodiment, a network N (wireless LAN network in the present embodiment) configured by devices to which the same network address as that of the router 2 is set is constructed. Specific configurations of the communication device 1 and the router 2 will be described later.

  The information processing apparatus 6 is, for example, a PC (Personal Computer), has a function as a wireless LAN client, and can wirelessly communicate with other wireless LAN access points including the router 2 via the wireless LAN.

  The server device 3 is connected to the Internet 5 and can communicate with the router 2 via the Internet 5 and can communicate with the communication device 1 via the Internet 5 and the mobile communication network 4.

(Configuration of Communication Device of One Embodiment)
FIG. 2 is a block diagram illustrating a schematic configuration of the communication device 1 configuring the communication system S of the embodiment. In FIG. 2, a communication device 1 includes a CPU (Central Processing Unit) 10, a ROM (Read Only Memory) 11, a RAM (Random Access Memory) 12, a display device 13, an internal storage unit 14, a mobile communication module 150, a voice interface. (I / F) 151, microphone 152, speaker 153, antenna 154, input device 16, and wireless LAN interface 17, CPU 10, ROM 11, RAM 12, display device 13, internal storage unit 14, mobile communication module 150, input device 16 and the wireless LAN interface 17 are connected by a common bus.

  The CPU 10 controls the operation of the entire communication apparatus 1 by being executed after a program such as firmware stored in the ROM 11 is expanded in the RAM 12. The CPU 10 also operates as each functional unit as shown in FIG. 4 by executing a program stored in the ROM 11. The operation of each functional unit shown in FIG. 4 will be described later. The ROM 11 stores programs such as the above-described firmware and various setting data. The RAM 12 operates as a work memory of the communication device 1 and temporarily stores various programs and data.

  The display device 13 includes a liquid crystal panel 131 and a liquid crystal driver 130 that drives the liquid crystal panel 131. The liquid crystal panel 131 is provided with its display surface exposed on the surface of the communication device 1. When the data constituting the display screen is supplied from the CPU 10 to the liquid crystal driver 130, the liquid crystal driver 130 drives the liquid crystal panel 131 to display a desired display screen on the display surface of the liquid crystal panel 131.

  The internal storage unit 14 includes an internal storage 141 and an internal storage interface (I / F) 140. The internal storage 141 is a non-volatile semiconductor memory such as a flash memory, and stores application programs and the like used in the communication device 1. When there is a data read / write command to the internal storage 141, the internal storage interface 140 controls the entire internal storage 141, performs data read / write control, and outputs the read data. . The internal storage 141 may be a detachable nonvolatile memory card such as a microSD. In this case, the internal storage interface 140 further includes a memory card slot in which the memory card is inserted.

  The mobile communication module 150 performs mobile radio communication with the mobile communication network 4 via the antenna 154 in accordance with, for example, the IMT (International Mobile Telecommunication) -2000 standard. That is, the mobile communication module 150 causes the audio signal obtained by decoding the radio wave received from the base station 4 a of the mobile communication network 4 to be generated from the speaker 153 via the audio interface 151, and via the audio interface 151. Then, the sound collected by the microphone 152 is encoded and transmitted as a radio wave to the base station 4 a of the mobile communication network 4 via the antenna 154. The mobile communication module 150 performs data communication by transmitting and receiving packetized data to and from the base station 4a of the mobile communication network 4. Note that the standards supported by the mobile communication module 150 include at least one of mobile communication standards established from the past to the present. As an example, 3G / HSDPA (3rd Generation / High-Speed Downlink Packet Access) , LTE (Long Term Evolution), and WiMAX (Worldwide Interoperability for Microwave Access). Furthermore, standards that are currently being formulated and will be formulated in the future can be suitably applied to the standards that the mobile communication module 150 supports. Also, voice may be transmitted and received as packetized data such as VoLTE (Voice over Long Term Evolution).

  The input device 16 includes an input interface (I / F) 160, an input instruction unit 161, and a touch panel 162.

  An input instruction unit 161 is connected to the input interface 160, and receives an input signal input by the user operating the input instruction unit 161. Examples of the input instruction unit 161 include a function button for performing a setting input start operation instruction. In the present embodiment, the touch panel 162 is provided so as to be superimposed on the upper surface of the display surface of the liquid crystal panel 131 and has substantially the same size as the display surface of the liquid crystal panel 131. When the user touches the surface of the touch panel 162, that is, when a specific position on the surface of the touch panel 162 is touched by the user, the specific position on the surface of the touch panel 162 is detected as a two-dimensional coordinate position. It is output via the interface 160.

  The wireless LAN interface 17 performs wireless communication with the router 2 that is a wireless access point in accordance with, for example, the IEEE (The Institute of Electrical and Electronics Engineers) 802.11 standard. The wireless LAN interface 17 can operate the communication device 1 as a wireless LAN client.

(Configuration of router of one embodiment)
FIG. 3 is a block diagram showing a schematic configuration of the router 2 constituting the communication system S according to the embodiment of the present invention. In FIG. 3, the router 2 of this embodiment includes a CPU 20, a ROM 21, a RAM 22, a wired LAN interface (I / F) 23, a wireless LAN interface (I / F) 24, and an internal storage unit 25, which are buses. Are connected to each other.

  The CPU 20 controls the entire router 2 by being executed after a program such as firmware stored in the ROM 21 is expanded in the RAM 22. The CPU 20 also operates as each functional unit shown in FIG. 4 by executing a program stored in the ROM 21. The operation of each functional unit shown in FIG. 4 will be described later. The ROM 21 stores a program such as the firmware described above. The RAM 22 functions as a work memory for the router 2 and temporarily stores various programs and data.

  The wired LAN interface 23 includes a WAN side interface 230 and a LAN side interface 231. The WAN-side interface 230 includes a network port (not shown), and a network cable (not shown) is inserted into the network port and connected to the Internet 5 via the network cable. Send and receive. Similarly, the LAN-side interface 231 includes a network port (not shown), and a network cable (not shown) is inserted into the network port and connected to another information processing apparatus 6 via the network cable. Data is transmitted to and received from the information processing apparatus 6. The wired LAN interface 23 performs wired communication based on, for example, the IEEE 802.3 standard.

  The wireless LAN interface 24 performs wireless communication with a wireless LAN client such as the communication device 1 in conformity with, for example, the IEEE 802.11 standard. The wireless LAN interface 24 can operate the router 2 as a wireless LAN access point.

  The internal storage unit 25 includes an internal storage 251 and an internal storage interface (I / F) 250. The internal storage 251 is a non-volatile semiconductor memory such as a flash memory, for example, and stores an application program 61 and other software used in the router 2 and connection information 60. Details of the connection information 60 will be described later. The internal storage interface 250 controls the entire internal storage 251 and performs data read / write control and outputs the read data when there is a data read / write command to the internal storage 251. . Note that the internal storage 251 may be a detachable nonvolatile memory card such as microSD. In this case, the internal storage interface 250 further includes a memory card slot in which the memory card is inserted.

(Functional configuration of communication system of one embodiment)
FIG. 4 is a functional block diagram illustrating a functional configuration of the communication system S according to the embodiment. In FIG. 4, the communication device 1 configuring the communication system S of the present embodiment includes a control unit 30, a storage unit 31, a display unit 32, an input unit 33, a first communication unit 34, and a second communication unit 35. . The control unit 30 includes a network address acquisition unit 36, an identification information acquisition unit 37, a determination unit 38, and a URI transmission / reception unit 39.

  The network address acquisition unit 36 acquires at least one of a default gateway address and a DNS server address in the network N to which the communication device 1 belongs. More specifically, the network address acquisition unit 36 operates as a DNS (Domain Name System) server that matches the address of the default gateway in the wireless LAN network N to which the communication device 1 belongs and the address of the default gateway in the wireless LAN network N. On the condition that there is a device (including relaying to a DNS server existing outside the wireless LAN network N), at least one of the DNS server addresses in the wireless LAN network N is acquired. Hereinafter, the term “apparatus that operates as a DNS server” is included, including an apparatus that performs a function of relaying to a DNS server existing outside the wireless LAN network N.

  The network address acquisition unit 36 acquires the address of the default gateway of the wireless LAN network N, and if there is a device that operates as a DNS server that matches the address of the default gateway in the wireless LAN network N, the method of acquiring the DNS server address is as follows: Well-known ones can be suitably applied. As an example, the network address acquisition unit 36 transmits a packet for acquiring a local IP address, which is a LAN-side IP address assigned to the communication device 1, to the wireless LAN network N, and the local IP address acquired as a reply to this packet The address of the default gateway in the wireless LAN network N to which the communication apparatus 1 belongs is transmitted using a subnet mask obtained as a reply to this packet by transmitting a packet for acquiring the subnet mask in the wireless LAN network N to which the communication apparatus 1 belongs. To get.

  Generally, regardless of whether or not the router 2 operates as a DHCP (Dynamic Host Configuration Protocol) server, the communication control unit 56 of the router 2 is disposed in the wireless LAN network N and connected to the router 2. The local IP address assigned to the device including the communication device 1 is grasped, and the network address acquisition unit 36 transmits a packet for inquiring about the local IP address assigned to the communication device 1 to the wireless LAN network N. Then, in response to the inquiry packet, the communication control unit 56 of the router 2 sends a reply including the local IP address assigned to the communication device 1. Similarly, the network address acquisition unit 36 transmits a packet for inquiring a subnet mask in the wireless LAN network N to which the communication device 1 belongs to the wireless LAN network N, and the communication control unit 56 responds to the inquiry packet. Then, a reply including the subnet mask in the wireless LAN network N to which the communication device 1 belongs is sent. Then, using the local IP address and subnet mask acquired from the communication control unit 56, the network address acquisition unit 36 acquires an address that is presumed to be the address of the default gateway in the wireless LAN network N to which the communication device 1 belongs.

  As an example, if the local IP address assigned to the communication device 1 is 192.168.1.10 and the subnet mask is 255.255.255.0, the network address acquisition unit 36 determines the values of these addresses. Address 192.168.1... Which is presumed to be the address of the default gateway from the value obtained by taking the bitwise XOR (Exclusive OR) for. X (an integer value in the range of X = 1 to 255) can be calculated.

  If the default gateway address can be obtained directly from the communication control unit 56 of the router 2, the address of the default gateway may be directly inquired to the wireless LAN network N without using the above-described method.

  Further, when there is a device operating as a DNS server in the wireless LAN network N, the communication control unit 56 of the router 2 knows the address of this DNS server. In addition, in recent years, with the increase in the number of functions of the router 2, the router 2 often has a DNS server function. Accordingly, the network address acquisition unit 36 inquires of the wireless LAN network N about the address of the DNS server in the wireless LAN network N to which the communication device 1 belongs, and the communication control unit 56 responds to the inquiry to the communication device 1. A reply including the address of the DNS server in the wireless LAN network N to which the As described above, in many cases, since the DNS server address is the local IP address of the router 2 and also the address of the default gateway, the network address acquisition unit 36 acquires the DNS server address acquired from the communication control unit 56. The address is the default gateway address. Such a technique is effective when the address of the default gateway of the wireless LAN network N cannot be obtained directly due to the restrictions of the control unit 30 and the first communication unit 34 of the communication device 1.

  Alternatively, the network address acquisition unit 36 has already been assigned (set) at least one of the local IP address, subnet mask, and default gateway address of the communication device 1 from the router 2, and is stored in the storage unit 31 of the communication device 1. If stored, the local IP address and the like stored in the storage unit 31 and the like may be acquired without making an inquiry to the router 2.

  Next, the identification information acquisition unit 37 transmits a specific protocol to the router 2 and accepts identification information including the LAN side IP address of the router 2. More specifically, when the identification information acquisition unit 37 includes the identification information transmission unit 58 in the router 2, the identification information acquisition unit 37 transmits a specific protocol to which only the identification information transmission unit 58 responds to the wireless LAN network N. The identification information including the local IP address that is the LAN side IP address of the router 2 included in the reply from the information transmission unit 58 is accepted. Therefore, when the router 2 does not include the identification information transmission unit 58, the identification information acquisition unit 37 does not accept the identification information.

  The specific protocol transmitted by the identification information acquisition unit 37 is such that the first communication unit 34 and the first communication unit 54 of the router 2 can communicate according to the TCP (Transmission Control Protocol) / IP (Internet Protocol) protocol. If there is, a specific (preferably unique) command conforming to the TCP / IP protocol may be used. Similarly, transmission from the identification information transmitting unit 58 is also performed according to a specific (preferably TCP / IP protocol). Can be any unique command. Details of the identification information included in the reply from the identification information transmission unit 58 will be described later.

  Based on the identification information of the router 2 acquired by the identification information acquisition unit 37 and at least one of the address of the default gateway and the DNS server acquired by the network address acquisition unit 36, the determination unit 38 In the case where a setting unit 57 for performing a setting procedure when the router 2 connects to the Internet 5 via the side interface 230 is provided, it is determined whether or not the setting unit 57 is operable. Preferably, the determination unit 38 is based on whether the local IP address that is the LAN side IP address of the router 2 acquired by the identification information acquisition unit 37 matches the address of the default gateway acquired by the network address acquisition unit 36. Thus, when the setting unit 57 is provided in the router 2, it is determined whether or not the setting unit 57 is operable.

  When the local IP address, which is the LAN side IP address of the router 2 acquired by the identification information acquisition unit 37, is the address of the default gateway acquired by the network address acquisition unit 36, the router 2 is configured in the configuration of the wireless LAN network N. Therefore, it can be determined that the router 2 is closest to the Internet 5 that is the WAN (upstream). When the local IP address of the router 2 acquired by the identification information acquisition unit 37 is the address of the DNS server acquired by the network address acquisition unit 36, the router 2 is a WAN in the configuration of the wireless LAN network N. It can be assumed that the router 2 is closest to the Internet 5 (upstream). Therefore, if the above conditions are satisfied, the determination unit 38 can determine that the setting unit 57 is operable when the setting unit 57 is provided in the router 2.

  In particular, an application program 61 (see FIG. 3) that enables the manufacturer of the router 2 to realize the functions of the network address acquisition unit 36, the identification information acquisition unit 37, and the determination unit 38 (preferably including a URI transmission / reception unit 39 described later). And the user of the communication device 1 obtains the application program 61 via the mobile communication network 4 and activates the application program 61 on the communication device 1, the identification information is stored in the router 2 manufactured by the manufacturer. If it is determined in advance that both the transmission unit 58 and the setting unit 57 are provided, the setting unit 57 is provided in the router 2 on condition that a reply including identification information is received from the identification information transmission unit 58 of the router 2. It is possible for the determination unit 38 to determine both that the setting unit 57 is operable and that the setting unit 57 is operable.

  Here, the determination unit 38 is connected to the router 2 via the first communication unit 34, which is a communication unit, based on whether or not the identification information acquisition unit 37 has received the identification information of the router 2. It is preferable to determine whether or not.

  When the identification information acquisition unit 37 transmits a specific protocol to the router 2, if the identification information acquisition unit 37 accepts the identification information of the router 2, the determination unit 38 includes at least the communication device 1 and the router 2. Can be determined to be connected via the first communication units 34 and 54 which are communication means. In addition, in this case, it can also be determined that the router 2 is provided with the identification information transmission unit 58. On the other hand, when the identification information acquisition unit 37 cannot accept the identification information of the router 2, the determination unit 38 determines that at least the communication device 1 is not connected to the router 2 via the first communication unit 34, or the router 2 is not provided with the identification information transmitter 58. Here, as described above, if the manufacturer of the router 2 determines in advance that the manufactured router 2 is provided with both the identification information transmission unit 58 and the setting unit 57, the identification information acquisition unit 37 is provided with the router. 2 cannot be accepted, the determination unit 38 can determine that the communication device 1 is not connected to the router 2 via the first communication unit 34.

  Further, the determination unit 38 determines whether there is a router 2 that operates as a DHCP server depending on whether or not the local IP address that is the LAN side IP address of the communication device 1 acquired by the network address acquisition unit 36 is a link local address. It is preferable to determine whether or not.

  When the local IP address of the communication device 1 acquired by the network address acquisition unit 36 is a link local address, that is, an address of 169.254.1.0 to 169.254.254.255, this link local address is communicated. The router 2, which is a device assigned to the device 1, does not operate as a DHCP server, but can be determined to have only an APIPA (Automatic Private IP Addressing) function or an AutoIP function. On the other hand, if the local IP address of the communication device 1 acquired by the network address acquisition unit 36 is not a link local address, the determination unit 38 determines that the router 2 with which the communication device 1 is communicating is the router 2 operating as a DHCP server. Can be determined.

  The URI transmission / reception unit 39 transmits a URI (Uniform Resource Identifier) to the router 2 and accepts the reply. The URI transmitted by the URI transmission / reception unit 39 is for the determination unit 38 to determine whether or not the router 2 is connected to the Internet 5 as described later, that is, a DNS server existing on the Internet 5. This is for determining whether or not name resolution has been performed. Therefore, the URI transmitted by the URI transmitting / receiving unit 39 is preferably a URI that exists on the Internet 5, that is, indicates the location of the server device 3 or the like outside the wireless LAN network N. As an example of the URI transmitted to the router 2 by the URI transmitting / receiving unit 39, a URL (Uniform Resource Locator) indicating the location of the homepage of the company installed by the manufacturer of the router 2 is preferably cited.

  Then, the determination unit 38 is based on at least one of whether the reply received by the URI transmission / reception unit 39 is a local IP address including the WAN-side IP address and whether the URI transmission / reception unit 39 accepted the reply. Thus, it is determined whether or not the router 2 is connected to the Internet 5.

  The communication control unit 56 (to be described later) of the router 2 transmits the URI transmitted from the URI transmission / reception unit 39 of the communication device 1 from the WAN side interface 230 provided in the second communication unit 55. If the WAN side interface 230 is connected to the Internet 5, as described above, the name is resolved by the DNS server existing on the Internet 5, and the global IP address that is the WAN side IP address corresponding to this URI is set. I will reply.

  On the other hand, if the WAN-side interface 230 of the router 2 is not connected to the Internet 5, the name resolution for the URI is not performed and the reply of the global IP address does not arrive. Alternatively, when the setting unit 57 of the router 2 is performing a communication setting operation, the setting unit 57 may return a local IP address in the wireless LAN network N temporarily. Therefore, the router 2 is connected to the Internet 5 based on at least one of whether the reply received by the URI transceiver 39 includes a global IP address and whether the URI transceiver 39 has accepted the reply. It can be determined whether or not.

  The display unit 32 generates a display screen on the display surface of the display unit 32 based on the display screen generation signal generated by the control unit 30. The input unit 33 receives an instruction from the user input to the communication device 1, generates an input signal based on the received instruction, and outputs the input signal to the control unit 30 or the like.

  The first communication unit 34 constituting the communication means performs wireless communication with a communication terminal including the first communication unit 54 of the router 2 via the communication path 40 which is a wireless LAN, and the router 2 and the like. Send and receive data between them. The second communication unit 35 performs wireless communication with the base station 4 a via the mobile communication network 4 and transmits / receives data to / from the Internet 5. Preferably, the second communication unit 35 also transmits / receives data to / from the second communication unit 55 of the router 2 via the Internet 5.

  On the other hand, the router 2 configuring the communication system S of the present embodiment includes a control unit 50, a storage unit 51, a first communication unit 54, and a second communication unit 55. The control unit 50 includes a communication control unit 56, a setting unit 57, and an identification information transmission unit 58.

  The communication control unit 56 uses a wired LAN / wireless LAN between the first communication unit 54 and the second communication unit 55 with other devices including the communication device 1, the Internet 5, and the information processing device 6. Control communication. Here, the second communication unit 55 includes a wired LAN interface 23 having a WAN side interface 230 and a LAN side interface 231. In addition, the communication control unit 56 relays packets input via the first and second communication units 54 and 55 in Layer 3 (third layer of the OSI (Open System Interconnection) reference model) according to the destination address. , And output via the first and second communication units 54 and 55.

  The setting unit 57 performs a setting procedure when the router 2 connects to the Internet 5 via the WAN side interface 230 provided in the second communication unit 55. Details of the communication setting operation performed by the setting unit 57 are disclosed in detail in, for example, the specification of a patent application already filed by the applicant (for example, Japanese Patent No. 4592342). explain.

  As a setting procedure when connecting the router 2 to the Internet 5, first, the router 2 performs a connection procedure to the Internet 5 via the PPPoE server designated by the ISP to which the user has a contract, or is designated. It is necessary to determine whether or not to perform a connection procedure to the Internet 5 via a DHCP (Dynamic Host Configuration Protocol) server.

  Therefore, the setting unit 57 transmits a DHCP request packet from the WAN-side interface 230 and waits for a predetermined time for a response from a DHCP server existing on the Internet 5. Next, when there is a response from the DHCP server, the setting unit 57 determines that the connection procedure to the Internet 5 should be performed via the DHCP server, and the information acquired from the DHCP server is stored in the storage unit 51. After storing, this information is used to set up a connection to the Internet 5, and a specific URL, for example, a URL indicating the location of the company's homepage set by the manufacturer of the router 2 is transmitted to the Internet 5. It is determined whether or not the router 2 has been connected to the Internet 5 based on whether or not name resolution has been performed.

  On the other hand, if the response from the DHCP server does not arrive within a certain time, the setting unit 57 determines that the procedure for connecting to the Internet 5 via the PPPoE server should be performed, and the PPPoE request packet is transmitted from the WAN side interface 230. And waits for a predetermined time for a response from the PPPoE server existing on the Internet 5. Next, when there is a response from the PPPoE server, if the setting unit 57 determines that the PPPoE setting has not yet been made, the setting unit 57 displays a PPPoE setting screen and allows the user to input various information for setting the PPPoE. Ask for. Then, the information input from the user is used to connect to the PPPoE server, and this information is stored in the storage unit 51.

  At the time of these various connection settings, since various information display and information input requests are made to the user via the web page, the setting unit 57 from the start of the connection setting work until the router 2 is connected to the Internet 5, When a URL indicating the location of a server or the like existing on the Internet 5 is transmitted from the communication device 1, a local IP address in the wireless LAN network N is temporarily returned to guide to a specific Web page. It plays a role as a DNS server.

  When the identification information transmission unit 58 accepts a specific protocol from the LAN side interface 231 of the second communication unit 55, the identification information transmission unit 58 assigns a local IP address that is the LAN side IP address of the router 2 to the device that has transmitted the specific protocol. The identification information of the router 2 including it is transmitted. More specifically, when the LAN-side interface 231 of the second communication unit 55 accepts the specific protocol transmitted by the identification information acquisition unit 37 of the communication device 1, the identification information transmission unit 58 responds to the specific protocol. Then, the identification information of the router 2 including the local IP address of the router 2 is transmitted to the communication device 1 that has transmitted the specific protocol via the LAN side interface 231 of the second communication unit 55. The information included in the identification information transmitted by the identification information transmitting unit 58 only needs to include at least the local IP address of the router 2, and may include other information. As an example, the identification information transmission unit 58 may transmit the device name of the router 2 as identification information in addition to the local IP address of the router 2.

  Connection information 60 is stored in the storage unit 51. The connection information 60 is used for establishing communication by wireless LAN such as SSID (Service Set Identification) used when the first communication unit 54 performs wireless LAN communication with other wireless terminals including the communication device 1. Communication information necessary for the wireless LAN, a wireless LAN encryption method such as WPA2-PSK (Wi-Fi Protected Access 2 Pre-Shared Key), and encryption information such as a key used for the encryption. The connection information 60 also includes connection setting information such as a user name, a password, and a DNS server address obtained by the setting unit 57 when the router 2 is connected to the Internet 5 by the setting operation of the setting unit 57.

  The first communication unit 54 performs wireless communication with the first communication unit 34 of the communication device 1 via the communication path 40 that is a wireless LAN, and transmits and receives data to and from the communication device 1. . The second communication unit 55 transmits and receives data between the Internet 5 and the information processing apparatus 6. Preferably, the second communication unit 55 transmits and receives data to and from the second communication unit 35 of the communication device 1 via the Internet 5.

  In the above configuration, the network address acquisition unit 36, the identification information acquisition unit 37, the determination unit 38, and the URI transmission / reception unit 39 constituting the control unit 30 and the control unit 30 are mainly configured by the CPU 10, and the storage unit 31 is mainly configured by the ROM 11. , The RAM 12 and the internal storage unit 14, the display unit 32 is mainly configured by the display device 13, the input unit 33 is mainly configured by the input device 16, and the first communication unit 34 is mainly configured by the wireless LAN interface 17. The second communication unit 35 is mainly composed of a mobile communication module 150, an audio interface 151, a microphone 152, a speaker 153, and an antenna 154.

  The communication control unit 56, the setting unit 57, and the identification information transmission unit 58 that constitute the control unit 50 and the control unit 50 are mainly configured by the CPU 20, and the storage unit 51 is mainly configured by the ROM 21, RAM 22, and the internal storage unit 25. The first communication unit 54 is mainly configured by the wireless LAN interface 24, and the second communication unit 55 is mainly configured by the wired LAN interface 23. The second communication unit 55 includes a WAN interface 230 and a LAN interface 231. The WAN interface 230 is connected to the Internet 5, and the LAN interface 231 is connected to the information processing apparatus 6. The operation of each functional unit shown in FIG. 4 will be described in detail later.

(Operation of Communication System of One Embodiment)
Next, with reference to the flowcharts of FIGS. 5 to 7 and FIGS. 8 to 11, the operation of the communication system S of the present embodiment will be described mainly focusing on the operation of the communication device 1.

  The functions of the control unit 30 and the network address acquisition unit 36, the identification information acquisition unit 37, the determination unit 38, and the URI transmission / reception unit 39 constituting the control unit 30 shown in FIG. A specific application program 61 is downloaded to the storage unit 31 of the communication device 1 via the mobile communication network 4 and the second communication unit 35, and the application program 61 is executed by the CPU 10. Realized above. The functions of the control unit 50 and the communication control unit 56, the setting unit 57, and the identification information transmission unit 58 that constitute the control unit 50 are the firmware stored in the storage unit 51 when the power of the router 2 is turned on. Is executed on the router 2 by being executed by the CPU 20.

  The flowchart shown in FIG. 5 starts when the application program 61 described above is executed in the communication device 1.

  First, in step S <b> 1, the control unit 30 of the communication device 1 acquires the wireless setting of the communication device 1. In other words, the control unit 30 inquires of the first communication unit 34 whether or not wireless LAN communication using the first communication unit 34 is possible, and acquires the result. In step S2, the control unit 30 determines whether or not the wireless setting acquired in step S1 is ON, in other words, whether or not wireless LAN communication using the first communication unit 34 is possible. If the wireless setting is ON or the wireless setting cannot be acquired (YES in step S2), the program proceeds to step S4. If the wireless setting is OFF (NO in step S2), the program The process proceeds to S3. Here, even when the wireless setting cannot be acquired, the reason for moving to step S4 as in the case where the wireless setting is ON is that the wireless setting may not be acquired depending on the specifications of the control unit 30, and therefore the wireless setting cannot be acquired. However, it is preferable to perform the subsequent operations.

  In step S3, the determination unit 38 of the communication device 1 determines that the subsequent determination operation cannot be performed because the wireless setting is OFF, and displays a display screen 32a as illustrated in FIG. 8A to the user. It is recommended that the application program 61 be started again with the wireless setting enabled, displayed on the unit 32. After this, the program ends.

  On the other hand, in step S4, the identification information acquisition unit 37 of the communication device 1 transmits a specific protocol to the router 2 via the first communication unit 34, and requests transmission (acquisition) of the identification information of the router 2. To do. Next, in step S5, the identification information acquisition unit 37 determines whether or not the identification information has been received from the router 2. If the identification information is received from the router 2 (YES in step S5), the program proceeds to step S8. If the identification information has not been received from the router 2 at this time (NO in step S5), the program proceeds to step S6. In step S6, it is determined whether or not a certain time has elapsed since the transmission of a specific protocol for acquiring identification information to the router 2, and if the certain time has elapsed (YES in step S6), the program Shifts to step S7, and if the predetermined time has not yet elapsed (NO in step S6), the program returns to step S5.

  In step S7, since the identification information is not received within a certain time after the specific protocol for acquiring the identification information is transmitted to the router 2, the router 2 including the identification information transmitting unit 58 is connected to the wireless LAN network N. 8 is displayed on the display unit 32, and the router 2 including the identification information transmission unit 58 is connected to the wireless LAN. Since it does not exist in the network N, it is notified that the determination operation by the determination unit 38 cannot be performed any more. After this, the program ends.

  In step S8, it is determined whether or not the identification information acquisition unit 37 has received a plurality of identification information by receiving the respective identification information from the plurality of routers 2 in step S5. If the identification information acquisition unit 37 acquires a plurality of identification information (YES in step S8), the program proceeds to step S9, and the identification information acquisition unit 37 acquires only a single identification information (step S8). If NO), the program proceeds to step S12.

  In step S9, the determination unit 38 determines that a plurality of routers 2 including the identification information transmission unit 58 exist on the wireless LAN network N, and causes the display unit 32 to display a display screen 32a as illustrated in FIG. By displaying the device name of the router 2 included in the plurality of identification information received in step S5 on the display screen 32a, the router 2 for performing the determination operation by the determination unit 38 is selected for the user. Instruct. In step S10, the user touches the area where the device name of any one router 2 is displayed on the display screen 32a, and waits until the input unit 33 outputs an input signal based on the touch operation. When the input unit 33 outputs an input signal based on the touch operation (YES in step S10), the program proceeds to step S11. In step S11, for the router 2 selected by the user, the determination unit 38 is set to perform the subsequent determination operation.

  In step S <b> 12, the URI transmission / reception unit 39 of the communication device 1 transmits a URI to the router 2. Next, in step S13, the URI transmitting / receiving unit 39 determines whether or not a reply from the router 2 has been received. If the reply has been received from the router 2 (YES in step S13), the program proceeds to step S15. If the reply from the router 2 has not been received at this time (NO in step S13), the program proceeds to step S14. In step S14, it is determined whether or not a certain time has elapsed since the URI was transmitted to the router 2. If the certain time has elapsed (YES in step S14), the program proceeds to step S16, and the certain time has passed. If the time has not yet elapsed (NO in step S14), the program returns to step S13.

  If a reply is not received even after a predetermined time has elapsed since the URI transmitting / receiving unit 39 transmitted the URI (YES in step S14), name resolution is not performed by the DNS server existing on the Internet 5, in other words, the router 2 is connected to the Internet. The program proceeds to step S16 assuming that it is necessary to continue the determination operation by the determination unit 38.

  In step S15, the determination unit 38 determines whether the reply from the router 2 received in step S13 is a local IP address. If the reply from the router 2 is a local IP address (YES in step S15), since the communication setting operation is performed by the setting unit 57, the setting unit 57 returns a local IP address. The program proceeds to step S16 because it is determined that it is necessary to continue the determination operation by the determination unit 38. On the other hand, when the reply from the router 2 is a global IP address (NO in step S15), name resolution is performed by the DNS server existing on the Internet 5, and the communication setting operation by the setting unit 57 is completed and the router The determination unit 38 determines that 2 is connected to the Internet 5. Therefore, it is determined that the subsequent determination operation by the determination unit 38 is unnecessary, and the program ends. In step S15, the identification information acquisition unit 37 has already received the identification information from the router 2 in step S5. Therefore, the router 2 to be determined by the determination unit 38 includes the identification information transmission unit 58. Therefore, it can be determined that the router 2 is very likely to include the setting unit 57.

  In step S16, the network address acquisition unit 36 of the communication device 1 transmits a packet requesting acquisition of the address of the default gateway. Next, in step S17, the network address acquisition unit 36 determines whether or not a reply to the packet requesting acquisition of the address of the default gateway has been received. If the reply has been received (YES in step S17), the program If the process proceeds to step S19 and no reply has been received at this time (NO in step S17), the program proceeds to step S18. In step S18, it is determined whether or not a certain time has elapsed since the packet requesting acquisition of the address of the default gateway has been transmitted. If the certain time has elapsed (YES in step S18), the program proceeds to step S20. If the program has shifted and the predetermined time has not yet elapsed (NO in step S18), the program returns to step S17.

  In step S19, it is determined whether or not the router 2 having the local IP address that matches the address of the default gateway as a reply exists in the wireless LAN network N. If the router 2 having a local IP address that matches the address of the default gateway as a reply exists in the wireless LAN network N (YES in step S19), the router 2 is configured on the wireless LAN network N. It is determined that the router 2 is closest to the Internet 5 that is the WAN (upstream), and the program proceeds to step S21 assuming that the determination operation by the determination unit 38 needs to be continued. On the other hand, if the router 2 having the local IP address that matches the address of the default gateway as a reply does not exist in the wireless LAN network N (NO in step S19), the program proceeds to step S20.

  Step S20 is a local IP address that matches the address of the default gateway that is a reply when the network address obtaining unit 36 does not send a reply within a predetermined time after transmitting a packet for requesting acquisition of the address of the default gateway. Is executed in any of the cases where the router 2 having no exists in the wireless LAN network N. In any case, since the router 2 that is the object of the determination operation by the determination unit 38 can be determined not to be connected to the Internet 5, the determination unit 38 instructs the user to A display screen 32 a as shown in FIG. 9B is displayed on the display unit 32 to notify that the router 2 is not connected to the Internet 5. After this, the program ends.

  In step S21, it is determined whether or not the address of the default gateway matches the local IP address of the router 2 that is the object of the determination operation by the determination unit 38. When the address of the default gateway matches the local IP address of the router 2 that is the object of the determination operation by the determination unit 38 (YES in step S21), the router that is the object of the determination operation by the determination unit 38 2 is very likely to include the setting unit 57, and the router 2 is the router 2 closest (upstream) to the Internet 5 as a WAN in the configuration of the wireless LAN network N. Since this router 2 is not yet connected to the Internet 5, in step S22, the determination unit 38 instructs the setting unit 57 of the router 2 to start the communication setting operation. At this time, the determination unit 38 causes the display unit 32 to display a display screen 32a as shown in FIG. 10A on the display unit 32, the communication setting operation by the setting unit 57 is started, and further, the setting unit 57 In a state where the communication setting operation is being performed, a display screen 32a as shown in FIG. 10B is displayed on the display unit 32 to notify that the communication setting operation by the setting unit 57 is being performed. After this, the program ends.

  On the other hand, if the address of the default gateway does not match the local IP address of the router 2 that is the target of the determination operation by the determination unit 38 (NO in step S21), the router having the local IP address that matches the address of the default gateway 2 determines that there is a high possibility that the setting unit 57 is not provided, and the program proceeds to step S23.

  In step S23, the network address acquisition unit 36 acquires the local IP address of the communication device 1. When the network address acquisition unit 36 has already acquired the local IP address of the communication device 1 as a process of acquiring the address of the default gateway in step S16, the local IP address of the communication device 1 acquired in step S16. Should be used.

  In step S24, it is determined whether or not the local IP address of the communication device 1 acquired in step S23 is a link local address. If the local IP address of the communication device 1 is a link local address (YES in step S24), It can be determined that there is no router 2 operating as a DHCP server in the wireless LAN network N. Therefore, it can be determined that there is no router 2 performing a routing operation in the wireless LAN network N. Therefore, in step S25, the determination unit 38 displays a display screen 32a as shown in FIG. 11A on the display unit 32, and the user confirms that there is no router 2 performing a routing operation in the wireless LAN network N. It is recommended to check the router 2 settings and so on. After this, the program ends.

  On the other hand, when the local IP address of the communication device 1 is not a link local address (NO in step S24), although there is a router 2 that performs a routing operation in the wireless LAN network N, as described above, the router 2 is a setting unit. It can be judged that there is a high possibility that 57 is not provided. Therefore, in step S26, the determination unit 38 displays the display screen 32a as shown in FIG. 11B on the display unit 32, and the router 2 including the setting unit 57 is not present in the wireless LAN network N. It is notified that the determination operation by the determination unit 38 cannot be performed any more. After this, the program ends.

(Effect of one embodiment)
As described above, according to the communication system S of the present embodiment, it is appropriately determined whether the router 2 existing in the wireless LAN network N includes the setting unit 57 and the identification information transmitting unit 58, and the setting unit 57 Can be appropriately started by the setting unit 57. Thereby, the communication setting operation for connecting the router 2 to the Internet 5 can be appropriately started.

(Modification)
Note that details of the communication device and the like of the present invention are not limited to the above-described embodiment, and various modifications are possible.

  As an example, the router 2 according to the embodiment has been described as including both the setting unit 57 and the identification information transmission unit 58, but the router 2 that does not include at least one of the setting unit 57 and the identification information transmission unit 58 is described. However, the present invention is preferably applicable.

  The identification information acquired by the identification information acquisition unit 37 or transmitted by the identification information transmission unit 58 only needs to include at least the local IP address of the router 2, and information on other routers 2 is used as the identification information. It is possible to send and receive. Further, the communication setting operation by the setting unit 57 is not limited to the above-described example, and various communication setting operations are possible.

  Furthermore, in the above-described embodiment, the communication device 1 and the router 2 are connected between the communication device 1 and the router 2 by the first communication units 34 and 54 that are examples of wireless communication means and the communication path 40 that is a wireless LAN. However, the communication means for enabling data communication between the communication device 1 and the router 2 is not limited to the wireless communication means, and well-known communication means can be suitably applied. . Examples of such communication means include a short-range wireless communication interface such as a wired LAN interface, a PLC (Power Line Communication) interface, a USB (Universal Serial Bus) interface, and a Bluetooth (registered trademark) interface.

  Further, the communication device 1 and the router 2 may have a plurality of interfaces of the same type. As an example, the communication device 1 and the router 2 may have a plurality of wireless LAN interfaces respectively corresponding to a plurality of frequency bands (for example, 2.4 GHz, 5 GHz). In this case, the control unit 30 including the network address acquisition unit 36, the identification information acquisition unit 37 and the determination unit 38 of the communication device 1, and the control including the communication control unit 56, the setting unit 57 and the identification information transmission unit 58 of the router 2. The unit 50 may perform the operation alternatively or from any of the plurality of interfaces. In this case, the identification information acquisition unit 37 transmits a specific protocol for each wireless LAN interface, manages the returned identification information of the router 2, and the determination unit 38 determines each of the routers 2 in each wireless LAN interface. May be. In addition, all of the routers 2 detected from a plurality of wireless LAN interfaces may be displayed as shown in FIG. 9A, and may be sequentially determined for each router 2 by the user selecting.

  In the above-described embodiment, the program for operating the communication device 1 and the router 2 is stored and provided in the ROMs 11 and 21 and the like, but the program is stored using an optical disk drive (not shown) or the like. A recording medium such as a DVD (Digital Versatile Disc), a USB external storage device, a memory card, or the like may be connected, and the program may be read from the DVD or the like into the communication device 1 or the router 2 to be operated. Alternatively, a program may be stored in the server device 3 on the Internet 5, and this program may be read into the router 2 and operated. Furthermore, in the above-described embodiment, the communication device 1 and the router 2 are configured by a plurality of hardware elements. However, the CPUs 10 and 20 can realize some operations of these hardware elements by program operations. It is.

N LAN network S Communication system 1 Communication device 2 Router 3 Server device 4 Mobile communication network 5 Internet 6 Information processing devices 10 and 20 CPU
11, 21 ROM
12, 22 RAM
13 Display device 14, 25 Internal storage unit 16 Input device 17, 24 Wireless LAN interface 23 Wired LAN interface 30, 50 Control unit 31, 51 Storage unit 32 Display unit 33 Input unit 34, 54 First communication unit 35, 55 2 communication unit 36 network address acquisition unit 37 identification information acquisition unit 38 determination unit 39 URI transmission / reception unit 40 communication path 56 communication control unit 57 setting unit 58 identification information transmission unit 60 connection information

Claims (10)

In a communication device that is located in the same network and is capable of data communication by means of communication with an information processing device having a WAN side interface,
A network address acquisition unit for acquiring at least one of a default gateway address and a DNS server address in the network to which the communication device belongs;
An identification information acquisition unit that transmits a specific protocol to the information processing apparatus and accepts identification information including a LAN-side IP address of the information processing apparatus;
Based on the identification information of the information processing device acquired by the identification information acquisition unit and at least one of the address of the default gateway and the address of the DNS server acquired by the network address acquisition unit, A determination unit for determining whether or not the setting unit is operable when a setting unit for performing a setting procedure when the information processing apparatus connects to the Internet via the WAN side interface is provided; A communication device comprising:   The network address acquisition unit acquires a LAN-side IP address assigned to the communication device, and the communication device uses the acquired LAN-side IP address and a subnet mask in the network to which the communication device belongs. The communication apparatus according to claim 1, wherein an address of the default gateway in the network to which the network belongs is acquired.   The determination unit determines whether the information on the LAN side IP address of the information processing apparatus acquired by the identification information acquisition unit matches the address of the default gateway acquired by the network address acquisition unit. 3. The communication apparatus according to claim 1, wherein when the setting unit is provided in a processing device, it is determined whether or not the setting unit is operable.   The determination unit determines whether the communication device is connected to the information processing device via the communication unit based on whether the identification information acquisition unit has received the identification information of the information processing device. The communication device according to claim 1, wherein the communication device is discriminated. A URI transmission / reception unit that transmits a URI to the information processing apparatus and accepts the reply;
The determination unit is configured to determine whether the reply received by the URI transmission / reception unit includes a WAN-side IP address and / or whether the URI transmission / reception unit accepted the reply. 5. The communication device according to claim 1, wherein it is determined whether or not is connected to the Internet.   The determination unit determines whether or not the information processing apparatus operating as a DHCP server exists depending on whether or not the LAN-side IP address of the communication apparatus acquired by the network address acquisition unit is a link local address. The communication device according to any one of claims 2 to 5, wherein:   The communication apparatus according to claim 1, wherein the communication apparatus can perform data communication with an information processing apparatus by wireless communication means. In a communication system comprising a communication device and an information processing device having a WAN-side interface, the communication device and the information processing device can perform data communication between each other by means of communication within the same network.
The communication device
A network address acquisition unit for acquiring at least one of a default gateway address and a DNS server address in the network to which the communication device belongs;
An identification information acquisition unit that transmits a specific protocol to the information processing apparatus and accepts identification information including a LAN-side IP address of the information processing apparatus;
Based on the identification information of the information processing apparatus acquired by the identification information acquisition unit and at least one of the address of the default gateway and the DNS server acquired by the network address acquisition unit, A determination unit for determining whether or not the setting unit is operable when a setting unit for performing a setting procedure when the information processing apparatus connects to the Internet via the WAN side interface is provided; A communication system comprising: A determination method in a communication device that is located in the same network and is capable of data communication by means of communication with an information processing device having a WAN side interface,
Obtaining at least one of a default gateway address and a DNS server address in the network to which the communication device belongs;
Sending a specific protocol to the information processing device, accepting identification information including the LAN side IP address of the information processing device,
Based on the identification information of the information processing apparatus and at least one of the address of the default gateway and the address of the DNS server, the information processing apparatus connects to the Internet via the WAN side interface. A determination method in a communication apparatus, wherein a setting unit for performing a setting procedure is provided to determine whether or not the setting unit is operable. A program that is executed by a computer that is located in the same network and that can communicate data with an information processing apparatus having a WAN-side interface by means of communication,
When this program is executed by the computer, the computer is
A network address obtaining unit for obtaining at least one of a default gateway address and a DNS server address in the network to which the computer belongs;
An identification information acquisition unit that transmits a specific protocol to the information processing apparatus and accepts identification information including a LAN-side IP address of the information processing apparatus;
Based on the identification information of the information processing device acquired by the identification information acquisition unit and at least one of the address of the default gateway and the address of the DNS server acquired by the network address acquisition unit, When a setting unit for performing a setting procedure when the information processing apparatus connects to the Internet via the WAN side interface is provided, it functions as a determination unit that determines whether or not the setting unit is operable A program characterized by letting

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