JP2014072655A - Communication device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technique that allows both communication devices able to communicate with each other to set an IP address received from the same server to their communication devices without one communication device transmitting an IP address to be imparted to the other communication device to the other communication device.SOLUTION: A multi-function peripheral (MFP) 10 receives a candidate IP address to be imparted to the MFP 10 and address information from each of an AP 6 and a router 9 in a state of an infrastructure mode. The MFP 10 stores in a memory the candidate IP address received from the router 9 as an IP address to be imparted to the MFP 10. The MFP 10 stores in the memory the address information of the router 9 received from the router 9. The MFP 10 transmits the address information of the router 9 in the memory to a telephone call device 70 in an ad-hoc mode.

Description

  The present specification discloses a communication device capable of executing communication via each of a first communication path and a second communication path different from the first communication path.

  Patent Document 1 discloses a technique for setting an IP address in an MFP (abbreviation of Multi-Function Peripheral) and a BOX. When the first IP address having the first network address is set in the MFP, the MFP sets an instruction to set the second IP address having the first network address as the IP address of the BOX. Send to BOX. Thereby, IP addresses having the same first network address are set in the MFP and the BOX.

JP 2012-34241 A

  In this specification, even if one communication device does not transmit the IP address to be given to the other communication device to the other communication device, the IP address is appropriately assigned to both communication devices from the same server. Provide technologies that can be granted.

  A communication device is disclosed herein. The communication device can communicate with a plurality of servers for providing IP addresses to other communication devices via the first communication route, and via a second communication route different from the first communication route. It is possible to communicate with a specific communication device. The communication device includes a first communication unit, a storage control unit, and a second communication unit. The first communication unit receives address information related to the server and an IP address to be assigned to the communication device from each of the plurality of servers via the first communication path. The storage control unit stores specific address information received from one of the plurality of servers in the memory. The storage control unit further stores the specific IP address received from the one server described above in the memory as an IP address to be assigned to the communication device. The second communication unit transmits specific address information in the memory to a specific communication device different from the communication device via the second communication path.

  According to this configuration, the communication device can notify the specific communication device of the one server described above that is the transmission source of the IP address given to the communication device. As a result, the specific communication device can acquire the IP address from the same server as the server that assigned the IP address to the communication device. Thereby, an IP address can be appropriately given to both communication apparatuses from the same server.

  The present specification discloses another communication apparatus. This communication device can communicate with a plurality of servers for providing IP addresses to other communication devices via a first communication route, and via a second communication route different from the first communication route. Thus, communication with a specific communication device is possible. The communication device may include a first communication unit, a second communication unit, and a storage control unit. The first communication unit receives address information related to the server and an IP address to be assigned to the communication device from each of the plurality of servers via the first communication path. The second communication unit receives specific address information related to one of the plurality of servers from the specific communication device via the second communication path. The storage control unit uses the specific address information and the address information received from each of the plurality of servers, and the above-described 1 related to the specific address information among the IP addresses received from the plurality of servers. An IP address received from one server is stored in the memory as an IP address to be assigned to the communication device.

  According to this configuration, the communication device can specify the one server described above that is the transmission source of the IP address assigned to the specific communication device. For this reason, the communication apparatus can acquire an IP address from the server which gave the IP address to the specific communication apparatus. Thereby, an IP address can be appropriately given to both communication apparatuses from the same server.

  Note that a control method, a computer program, and a computer-readable storage medium for storing the computer program for realizing each of the communication devices are also novel and useful. In addition, a communication system including each of the above communication devices is new and useful.

1 shows a configuration of a wireless communication system. 3 shows a flowchart of a wireless setting process executed by the MFP. The flowchart of the radio | wireless setting process which a call device performs is shown. FIG. 2 shows a sequence diagram of wireless setting processing executed by an MFP and a calling device. FIG. 5 shows a sequence diagram continued from FIG. 4.

(Configuration of wireless communication system)
As shown in FIG. 1, the wireless communication system 2 includes an AP 6, a PC 8, a FAX communication system 7, a FAX apparatus 4, and a router 9. The FAX communication system 7 includes an MFP 10 and a call device 70. The MFP 10 and the calling device 70 can perform wireless communication with each other via the AP 6 or without the AP 6. In other words, the MFP 10 and the calling device 70 can execute infrastructure wireless communication via the AP 6 or ad hoc wireless communication not via the AP 6. In the present embodiment, wireless communication is performed based on the IEEE standard of IEEE (abbreviation of The Institute of Electrical and Electronics Engineers, Inc.) and a standard conforming thereto (for example, 802.11a, 11b, etc.). Executed. Accordingly, setting information WS1 and WS2, which will be described later, are setting information conforming to the above standards. The telephone device 70 can perform FAX data communication with the FAX apparatus 4 via a PSTN (abbreviation of Public Switched Telephone Network) 5 which is a general public line network. Further, the MFP 10 can execute wireless communication with the PC 8 via the AP 6. In the present embodiment, it is assumed that the MFP 10 and the calling device 70 are not shipped individually, but are shipped with the MFP 10 and the calling device 70 paired together.

  The AP 6 has an access point function that is a base station for wireless communication. The AP 6 further has a DHCP (abbreviation of Dynamic Host Configuration Protocol) server function that transmits an IP address to be given to a device (for example, the MFP 10) capable of performing wireless communication with the AP 6 to the device. The router 9 has a routing function for relaying communication between networks. The router 9 further has a DHCP server function for transmitting an IP address to be given to a device (for example, the MFP 10) that can communicate with the router 9 to the device.

  That is, the wireless communication system 2 includes a plurality (two in this embodiment) of DHCP servers for assigning IP addresses to devices in the wireless communication system 2, that is, the MFP 10 and the call device 70. For example, when a user who does not know that the router 9 has a DHCP server function connects the AP 6 to the router 9, the situation of the wireless communication system 2 occurs.

(Configuration of MFP 10)
The MFP (which may be referred to as a “master”) 10 includes an operation unit 12, a display unit 14, a print execution unit 16, a scan execution unit 18, a wireless interface 20, and a control unit 30. The operation unit 12 includes a plurality of keys. The user can input various instructions to the MFP 10 by operating the operation unit 12. The display unit 14 is a display for displaying various information. The print execution unit 16 is a printing mechanism such as an inkjet method or a laser method. The scan execution unit 18 is a scan mechanism such as a CCD or CIS. The wireless interface 20 is an interface for executing wireless communication.

  The control unit 30 includes a CPU 32, an NVRAM (nonvolatile memory) 34, a RAM (volatile memory) 40, and a ROM 43. The CPU 32 executes various processes according to the program 44 stored in the ROM 43. When the CPU 32 executes the process according to the program 44, the functions of the units 52 to 58 are realized.

  The NVRAM 34 includes a designated setting storage area 36, an initial setting storage area 38, and an address information storage area 39. The initial setting storage area 38 is a storage area for storing setting information predetermined by the vendor of the MFP 10 (that is, a default authentication method, a default encryption method, a default password, etc.). Hereinafter, the setting information stored in the initial setting storage area 38 is referred to as “initial setting WS1”. The initial setting WS1 is stored in the MFP 10 in advance when the MFP 10 is shipped. The initial setting WS1 is ad hoc wireless setting information for realizing wireless communication not via the access point 6.

  When the user desires to perform wireless communication using setting information different from the initial setting WS1, the user operates the operation unit 12 of the MFP 10 to set the setting information (that is, the MFP 10 to use). Authentication method, encryption method, password, etc. can be specified. Hereinafter, the setting information of the MFP 10 designated by the user is referred to as “designated setting WS2”. The designated setting storage area 36 is a storage area for storing the designated setting WS2. In the present embodiment, the designated setting WS 2 is infrastructure wireless communication setting information for realizing wireless communication via the access point 6. Therefore, the designated setting WS2 is different from the initial setting WS1 which is the ad hoc wireless setting information.

  The address information storage area 39 is a storage area for storing the IP address of the DHCP server (for example, AP 6 or router 9) that has given the MFP 10 an IP address. The address information storage area 39 stores the IP address of the DHCP server transmitted from the DHCP server together with the IP address to be assigned to the MFP 10.

  The RAM 40 includes a target setting storage area 42. The target setting storage area 42 is a storage area for storing setting information to be currently used when the MFP 10 performs wireless communication. When the MFP 10 is turned on from when the MFP 10 is shipped until the designated setting WS2 is designated by the user, the CPU 32 reads the initial setting WS1 from the initial setting storage area 38 and stores the target setting. Store in area 42. As a result, the MFP 10 can execute wireless communication using the ad hoc wireless setting information. After the designated setting WS2 is designated by the user, when the MFP 10 is powered on, the CPU 32 normally stores the designated setting WS2 in the target setting storage area 42. As a result, the MFP 10 can execute wireless communication using the setting information of infrastructure wireless communication.

  The MFP 10 performs wireless communication in one of two modes, an infrastructure mode and an ad hoc mode. When the initial setting WS1 is stored in the target setting storage area 42, the MFP 10 can execute wireless communication in the ad hoc mode and cannot execute wireless communication in the infrastructure mode. On the other hand, when the designated setting WS2 is stored in the target setting storage area 42, the MFP 10 can execute wireless communication in the infrastructure mode and cannot execute wireless communication in the ad hoc mode.

(Configuration of calling device 70)
The call device (which may be referred to as “slave unit”) 70 includes a microphone 72, a speaker 74, a PSTN interface 76, a wireless interface 78, and a control unit 80. Since the calling device 70 includes the microphone 72 and the speaker 74, the user can perform telephone communication via the PSTN 5 using the calling device 70. The PSTN interface 76 is connected to the PSTN 5. Specifically, one end of a PSTN cable is connected to the PSTN interface 76. The other end of the PSTN cable is connected to a PSTN socket in the home, for example. The wireless interface 78 is an interface for executing wireless communication.

  The control unit 80 includes a CPU 82, NVRAM 84, RAM 90, and ROM 94. The CPU 82 executes various processes according to the program 96 stored in the ROM 94. When the CPU 82 executes processing according to the program 96, the functions of the units 102 to 108 are realized.

  The NVRAM 84 includes a designated setting storage area 86 and an initial setting storage area 88. The initial setting storage area 88 is a storage area for storing the initial setting WS1 of the same ad hoc wireless communication as that of the MFP 10. The initial setting WS1 is stored in advance in the calling device 70 at the shipping stage of the calling device 70 (that is, at the shipping stage of the MFP 10).

  The designated setting storage area 86 is a storage area for storing the designated setting WS2. In the present embodiment, the designated setting WS2 is infrastructure wireless communication setting information. The MFP 10 can transmit the setting information to be used by the calling device 70 (that is, the specified setting WS2 such as the authentication method, the encryption method, and the password) to the calling device 70 by executing the ad hoc wireless communication. . Thereby, the telephone device 70 can acquire the designated setting WS2. Accordingly, the designated setting storage area 86 can store the designated setting WS2. The designated setting WS2 is different from the initial setting WS1 for ad hoc wireless communication.

  The RAM 90 includes a target setting storage area 92. The target setting storage area 92 is a storage area for storing wireless setting information to be currently used by the calling device 70. From when the calling device 70 is shipped together with the MFP 10 until the designated setting WS2 is stored in the designated setting storage area 86, the control unit 80 targets the initial setting WS1 when the power of the calling device 70 is turned on. Store in the setting storage area 92. Thereby, the telephone device 70 can execute wireless communication using the setting information of the ad hoc wireless communication. After the designated setting WS2 is stored, when the telephone device 70 is powered on, the control unit 80 normally stores the designated setting WS2 in the target setting storage area 92. Thereby, the telephone device 70 can execute wireless communication using the setting information of the infrastructure wireless communication. The MFP 10 and the calling device 70 are in a state where they can communicate with each other because the initial setting WS1 is set as its own wireless setting at the time of shipment.

  That is, as with the MFP 10, the calling device 70 performs wireless communication in one of two modes, an infrastructure mode and an ad hoc mode. When the initial setting WS1 is stored in the target setting storage area 92, the calling device 70 can perform wireless communication in the ad hoc mode and cannot perform wireless communication in the infrastructure mode. When the designated setting WS2 is stored in the target setting storage area 92, the MFP 10 can execute wireless communication in the infrastructure mode and cannot execute wireless communication in the ad hoc mode.

  The MFP 10 executes processing in cooperation with the calling device 70, thereby realizing a specific function (for example, a FAX function) among a plurality of functions (for example, a FAX function and a printing function) that can be realized by the MFP 10. Accordingly, the calling device 70 is normally shipped together with the MFP 10 instead of being shipped alone. That is, the call device 70 is an accessory device of the MFP 10.

(FAX function)
For example, when receiving the FAX data via the PSTN interface 76, the calling device 70 transmits the FAX data to the MFP 10 by executing wireless communication. By executing wireless communication, the MFP 10 causes the print execution unit 16 to print an image represented by the FAX data when the FAX data transmitted from the calling device 70 is received by the wireless interface 20. As a result, a FAX reception operation is executed.

  Further, the MFP 10 transmits FAX data generated by the scan execution unit 18 scanning the document to the call device 70 by executing wireless communication. When the FAX data transmitted from the MFP 10 is received by the wireless interface 78, the calling device 70 transmits the FAX data to the destination designated in advance by the user via the PSTN 5. As a result, a FAX transmission operation is executed.

  The MFP 10 includes the print execution unit 16 for printing an image represented by the FAX data received via the PSTN 5, but the call device 70 does not include the print execution unit 16. The MFP 10 includes a scan execution unit 18 for scanning a document and generating FAX data to be transmitted via the PSTN 5, but the calling device 70 does not include the scan execution unit 18. That is, the calling device 70 can receive FAX data via the PSTN 5 instead of the MFP 10 and can transmit FAX data via the PSTN 5 instead of the MFP 10.

  As described above, the calling device 70 does not include the print execution unit 16 and the scan execution unit 18. Accordingly, the calling device 70 has a smaller size than the MFP 10. In general, the position of the PSTN socket is determined in the home. If a configuration in which a PSTN cable must be connected to the MFP 10 is employed, the MFP 10 needs to be disposed in the vicinity of the PSTN socket. Since the MFP 10 has a relatively large size, it is difficult to place the MFP 10 near the PSTN socket in an environment where there is little space near the PSTN socket. On the other hand, in the present embodiment, the PSTN interface 76 is provided in the call device 70 having a relatively small size. Therefore, even in an environment where there is little space near the PSTN socket, the call device 70 can be easily arranged near the PSTN socket and the call device 70 can be connected to the PSTN 5. Further, the MFP 10 can be arranged without being limited to the vicinity of the PSTN socket.

(Wireless setting process of MFP 10)
Next, a wireless setting process executed by the MFP 10 for the MFP 10 to execute infrastructure wireless communication via the AP 6 will be described with reference to FIG. When the user purchases the MFP 10 and the calling device 70, the user places the MFP 10 and the calling device 70, for example, at home. When the user turns on the MFP 10, the MFP 10 is set to the ad hoc mode. Specifically, the switching unit 58 stores the initial setting WS1 stored in the initial setting storage area 38 in the target setting storage area 42. Similarly, when the user turns on the power of the calling device 70, the calling device 70 is set to the ad hoc mode. Specifically, the switching unit 108 stores the initial setting WS1 stored in the initial setting storage area 88 in the target setting storage area 92. Next, the second communication unit 54 of the MFP 10 uses the initial setting WS1 to execute connection establishment processing with the call device 70 in order to perform ad hoc wireless communication with the call device 70.

  Specifically, the second communication unit 54 transmits a connection request including the initial setting WS 1 stored in the target setting storage area 42 to the call device 70. When the connection request is received from the MFP 10, the second communication unit 104 of the call device 70 performs authentication based on the connection request. This authentication includes a determination regarding whether or not the authentication method and encryption method included in the connection request match the authentication method and encryption method included in the initial setting WS1 stored in the target setting storage area 92. Since the initial setting WS1 is stored in advance in both the MFP 10 and the calling device 70, the above authentication is normally successful. The second communication unit 104 transmits an authentication result indicating successful authentication to the MFP 10. The connection establishment process includes transmission of a connection request, authentication, and transmission of an authentication result. The second communication unit 54 monitors reception of the authentication result from the call device 70. When the authentication result is received from the calling device 70, the MFP 10 and the calling device 70 can execute ad hoc wireless communication.

  In this situation, when the second communication unit 104 of the call device 70 receives FAX data from an external device (for example, the FAX device 4) via the PSTN 5, the second communication unit 104 uses ad hoc wireless communication (that is, the initial setting WS1). The FAX data is transmitted to the MFP 10. Further, when a FAX transmission instruction is executed by the user operating the operation unit 12, the control unit 30 of the MFP 10 reads a document set in the scan execution unit 18 and generates FAX data. Next, the second communication unit 54 transmits the generated FAX data to the call device 70 using ad hoc wireless communication (that is, using the initial setting WS1). Subsequently, the control unit 80 of the call device 70 transmits FAX data to a specific device (for example, the FAX apparatus 4) via the PSTN 5.

  Here, when the designated setting WS2 is designated by the user, the MFP 10 executes wireless setting processing executed by the MFP 10 for executing infrastructure wireless communication with the calling device 70 via the AP 6.

  In S10, the switching unit 58 switches the MFP 10 from the ad hoc mode to the infrastructure mode. Specifically, when the designated setting WS2 is stored in the designated setting storage area 36 when the designated setting WS2 is designated by the user, the switching unit 58 sets the initial setting WS1 stored in the target setting storage area 42. And the designated setting WS2 is stored in the target setting storage area 42. Next, in S12, the first communication unit 52 uses the designated setting WS2 to transmit a connection request including the designated setting WS2 to the AP 6 in order to perform wireless communication with the AP 6. When the AP 6 receives the connection request, the AP 6 performs authentication based on the connection request. This authentication includes, for example, authentication relating to whether or not the AP 6 supports the authentication method and encryption method included in the designated setting WS2, and authentication relating to whether or not the password included in the designated setting WS2 is registered in the AP 6. Etc. AP 6 transmits the authentication result to MFP 10.

  In S14, the first communication unit 52 monitors reception of an authentication result from the AP 6. When an authentication result indicating successful authentication is received from the AP 6 (YES in S14), the MFP 10 and the AP 6 are in a state where a wireless connection has been established, and wireless communication can be performed. If YES in S14, the process proceeds to S16. On the other hand, when the authentication result indicating the authentication success is not received from the AP 6, that is, when the authentication result indicating the authentication failure is received from the AP 6 or when the authentication result is not received from the AP 6 (NO in S14). In S15, the switching unit 58 switches the MFP 10 from the infrastructure mode to the ad hoc mode. Specifically, the switching unit 58 deletes the designated setting WS2 stored in the target setting storage area 42 and stores the initial setting WS1 in the target setting storage area 42. When the MFP 10 is switched to the ad hoc mode in S15, the process proceeds to S38.

  In S <b> 16, the first communication unit 52 broadcasts an IP address assignment request packet (for example, DHCP DISCOVER) that requests an IP address to be assigned to the MFP 10 in order to execute wireless communication in the infrastructure mode. The IP address assignment request packet is received by each device 6, 8, 9 of the wireless communication system 2. When the AP 6 and the router 9 having the DHCP server function receive the IP address allocation request packet, the AP 6 and the router 9 include a packet (for example, DHCP OFFER) including a candidate IP address to be given to the MFP 10 that is the transmission source of the IP address allocation request packet. Transmit to the MFP 10. The AP 6 and the router 9 further transmit the IP address set as its own IP address to the MFP 10.

  Next, in S18, the first communication unit 52 receives the candidate IP address to be given to the MFP 10 and the IP address of the DHCP server as a response to the IP address assignment request packet. The wireless communication system 2 includes a plurality of DHCP servers, that is, an AP 6 and a router 9. Therefore, in S18, the first communication unit 52 receives a combination of a plurality of candidate IP addresses and the DHCP server IP address.

  Next, in S20, the storage control unit 56 stores one candidate IP address received first after transmitting the IP address allocation request packet among the plurality of candidate IP addresses received in S18. Store in area 42. The storage control unit 56 further stores the IP address of the DHCP server received in combination with the candidate IP address stored in the target setting storage area 42 in the address information storage area 39. In the modification, the storage control unit 56 may store one candidate IP address received in any of the second and subsequent ones in the target setting storage area 42 after transmitting the IP address assignment request packet. Good.

  Next, in S22, the first communication unit 52 assigns an allocation candidate IP address acquisition request packet (for example, DHCP REQUEST) that is a packet indicating that one candidate IP address stored in the target setting storage area 42 has been assigned. Broadcast. Next, in S24, the first communication unit 52 monitors reception of a response to the packet transmitted in S22. Upon receiving the allocation candidate IP address acquisition request packet, the transmission source DHCP server (that is, the AP 6 or the router 9) that has transmitted the candidate IP address to the MFP 10 transmits an approval response (for example, DHCP ACK) of the packet to the MFP 10. When a device other than the source DHCP server of the candidate IP address receives the allocation candidate IP address acquisition request packet, whether or not the IP address set as the IP address of the device itself matches the candidate IP address. If there is a match, a duplication warning packet (for example, DHCP DELINE) indicating that the IP address is duplicated is transmitted to the MFP 10 as a response to the packet.

  If a duplicate warning packet is received before the predetermined period has elapsed since the transmission of the allocation candidate IP address acquisition request packet (NO in S24), the process returns to S16, and the process from S16 to S22 is performed again. The candidate IP address is acquired. In this case, the storage control unit 56 deletes the candidate IP address and the DHCP server IP address stored in S20.

  On the other hand, when the approval response is received and the duplicate warning packet is not received before the predetermined period has elapsed since the transmission of the allocation candidate IP address acquisition request packet (YES in S24), in S26, The storage control unit 56 stores the candidate IP address in the designated setting storage area 36 as an IP address to be given to the MFP 10. As a result, the IP address used by the MFP 10 in the infrastructure mode is set in the MFP 10.

  Next, in S <b> 28, the switching unit 58 switches the MFP 10 from the infrastructure mode to the ad hoc mode. Specifically, the first communication unit 52 deletes the designated setting WS2 stored in the target setting storage area 42 and the IP address stored in S20, and stores the initial setting WS1 in the target setting storage area 42. To do.

  Next, in S <b> 30, the second communication unit 54 performs ad hoc wireless communication using the initial setting WS <b> 1, and transmits the designated setting WS <b> 2 stored in the designated setting storage area 36 to the call device 70. The second communication unit 54 further transmits the IP address of the DHCP server stored in the address information storage area 39 to the call device 70. When the designated device WS2 and the IP address of the DHCP server are received, the calling device 70 transmits a packet indicating reception completion to the MFP 10.

  In S <b> 32, the second communication unit 54 monitors whether a packet indicating reception completion is received from the call device 70. If the second communication unit 54 does not receive a packet indicating the completion of reception until the predetermined period elapses after transmitting the designated setting WS2 or the like to the call device 70 (NO in S32), the process proceeds to S38. move on.

  In S38, the storage control unit 56 deletes the designated setting WS2 stored in the designated setting storage area 36, and ends the wireless setting process. If the IP address is stored in the designated setting storage area 36 in S26, the storage control unit 56 also deletes the IP address. If NO in S14, the MFP 10 cannot execute wireless communication with the AP 6 using the designated setting WS2. In the case of NO in S32, there is a high possibility that the calling device 70 has not received the designated setting WS2. When the calling device 70 has not received the designated setting WS2, even if the MFP 10 performs wireless communication in the infrastructure mode using the designated setting WS2, the MFP 10 may execute communication with the calling device 70. Can not. Therefore, the MFP 10 can avoid executing the wireless communication in the infrastructure mode by using the designated setting WS2 by deleting the designated setting WS2.

  On the other hand, the second communication unit 54 receives a packet indicating reception completion before a predetermined period has elapsed after transmitting the designated setting WS2 or the like to the call device 70 (YES in S32). The CPU 32 switches the MFP 10 from the ad hoc mode to the infrastructure mode (S10), transmits a connection request including the designated setting WS2 to the AP 6 (S12), and receives a successful authentication (S14). In switching from the ad hoc mode to the infrastructure mode, the IP address stored in the designated setting storage area 36 is stored in the target setting storage area 42 in addition to the designated setting WS2. In this S14, since the authentication has already been successful in the previous S14, the authentication success is usually received. Therefore, in FIG. 2, the route determined to be NO in S14 is omitted.

  Next, in S34, as in S22, the first communication unit 52 broadcasts an allocation candidate IP address acquisition request packet. In S34, the allocation candidate IP address acquisition request packet includes the IP address stored in the target setting storage area 42 (that is, the IP address stored in the designated setting storage area 36 in S26). According to this configuration, the first communication unit 52 does not need to newly broadcast an IP address assignment request packet. In addition, since the IP address of the MFP 10 is not changed, the DHCP server (that is, the AP 6 or the router 9) assigned the IP address to the MFP 10 is not changed.

  Next, in S36, the first communication unit 52 receives an approval response from the DHCP server (that is, the AP 6 or the router 9) assigned the IP address to the MFP 10, and ends the wireless setting process. In S24, the approval response has already been received without receiving the duplicate warning packet. For this reason, in S36, normally, as in S24, the first communication unit 52 can receive the approval response without receiving the duplicate warning packet.

(Wireless setting processing of the calling device 70)
Next, with reference to FIG. 3, a wireless setting process executed by the communication device 70 for the telephone device 70 to execute infrastructure wireless communication via the AP 6 will be described. This process starts when the power of the calling device 70 is turned on. As described above, when the user turns on the telephone device 70, the telephone device 70 is set to the ad hoc mode.

  In S <b> 50, the second communication unit 104 monitors that the designated setting WS <b> 2 and the IP address of the DHCP server are received from the MFP 10. When the designated setting WS2 and the IP address of the DHCP server are received (YES in S50 of FIG. 3), in S52, the second communication unit 104 transmits a packet indicating reception completion to the MFP 10.

  Next, in S54, the storage control unit 106 stores the designated setting WS2 received in S50 in the designated setting storage area 86. Next, the switching unit 108 switches the call device 70 from the ad hoc mode to the infrastructure mode. Specifically, the switching unit 108 deletes the initial setting WS 1 from the target setting storage area 92 and stores the designated setting WS 2 in the target setting storage area 92.

  Next, in S56, the first communication unit 102 uses the designated setting WS2 to transmit a connection request including the designated setting WS2 to the AP 6 in order to perform wireless communication with the AP 6. The process of S56 is the same as the process of S12. In S58, the first communication unit 102 monitors reception of the authentication result from the AP 6. When an authentication result indicating successful authentication is received from the AP 6 (YES in S58), the telephone device 70 and the AP 6 are in a state where a wireless connection is established, and wireless communication can be executed. If YES in S58, the process proceeds to S60. On the other hand, either the case where the authentication result indicating the authentication success is not received from the AP 6 (NO in S14), that is, the case where the authentication result indicating the authentication failure is received from the AP 6 or the case where the authentication result is not received from the AP 6 is selected. In the case (NO in S58), in S74, the switching unit 108 switches the communication device 70 from the infrastructure mode to the ad hoc mode. Specifically, the switching unit 108 deletes the designated setting WS2 stored in the target setting storage area 92 and stores the initial setting WS1 in the target setting storage area 92. Next, in S76, the storage control unit 106 deletes the designated setting WS2 stored in the designated setting storage area 86, and ends the wireless setting process.

  In S60, the first communication unit 102 broadcasts an IP address assignment request packet (for example, DHCP DISCOVER) that requests an IP address to be assigned to the communication device 70 in order to execute wireless communication in the infrastructure mode. The IP address allocation request packet transmitted in S60 is received by each of the devices 6, 8, and 9 in the same manner as the IP address allocation request packet transmitted in S16. Thereby, the AP 6 and the router 9 having the DHCP server function transmit a packet (for example, DHCP OFFER) including a candidate IP address to be given to the call device 70 to the communication device 70. The AP 6 and the router 9 further transmit the IP address set as its own IP address to the communication device 70.

  Next, in S62, the first communication unit 102 receives the candidate IP address to be assigned to the communication device 70 and the IP address of the DHCP server as a response to the IP address assignment request packet. In S64, the first communication unit 102 matches the IP address of the DHCP server received from the DHCP server, that is, the AP 6 and the router 9 in S62, and the IP address of the DHCP server received from the MFP 10 in S50. Judge whether to do. Similar to S18, the first communication unit 102 receives a combination of a plurality of candidate IP addresses and the IP address of the DHCP server. The first communication unit 102 executes the process of S64 every time a combination of the candidate IP address and the IP address of the DHCP server is received in S62.

  When the IP address of the DHCP server received in S62 does not match the IP address of the DHCP server received in S50 (NO in S64), the process returns to S62. On the other hand, if the IP address of the DHCP server received in S62 matches the IP address of the DHCP server received in S50 (YES in S64), the storage control unit 106 determines YES in S64 in S66. The candidate IP address received in combination with the IP address of the received DHCP server is stored in the target setting storage area 92.

  Next, in S68, the first communication unit 102 transmits an allocation candidate IP address acquisition request packet (DHCP REQUEST) that is a packet indicating that one candidate IP address stored in the target setting storage area 92 has been assigned. To broadcast. Next, in S70, the first communication unit 102 monitors reception of a response to the packet transmitted in S68, similarly to the first communication unit 52 in S24. The source DHCP server (that is, the AP 6 or the router 9) of the candidate IP address transmits an approval response to the call device 70 as a response to the allocation candidate IP address acquisition request packet. When the allocation candidate IP address acquisition request packet is received, the device other than the transmission source DHCP server determines whether or not the IP address assigned to the device matches the candidate IP address. As a response to the packet, a duplicate warning packet (DHCP DELINE) indicating that the IP address is duplicated is transmitted to the call device 70.

  The first communication unit 102 returns to S60 if a duplicate warning packet is received (NO in S70) before the predetermined period elapses after transmitting the allocation candidate IP address acquisition request packet. In this case, the storage control unit 56 deletes the candidate IP address stored in S66, and obtains the candidate IP address again through the processing from S60 to S68. On the other hand, the first communication unit 102 receives the approval response and does not receive the duplicate warning packet before the predetermined period elapses after transmitting the allocation candidate IP address acquisition request packet ( YES at S70), the process proceeds to S72. In S <b> 72, the storage control unit 106 stores the candidate IP address in the designated setting storage area 86 as an IP address to be assigned to the call device 70, and ends the wireless setting process. As a result, the IP address used by the call device 70 in the infrastructure mode is set in the call device 70.

  Next, referring to FIGS. 4 and 5, the MFP 10 and the calling device 70 obtain an IP address for infrastructure wireless communication from the DHCP server, and the MFP 10 and the calling device 70 in the infrastructure mode. Processing until communication is possible will be described.

  In a state where the MFP 10 and the calling device 70 can execute ad hoc wireless communication, the MFP 10 erases the initial setting WS1 stored in the target setting storage area 42 and sets the designated setting WS2 in the target setting storage area 42. (S10 in FIG. 2). As a result, the MFP 10 switches from the ad hoc mode to the infrastructure mode.

  The MFP 10 transmits a connection request to the AP 6 (S12 in FIG. 2), and the AP 6 executes an authentication process, thereby enabling wireless communication between the AP 6 and the infrastructure (YES in S14 in FIG. 2). Next, the MFP 10 broadcasts an IP address assignment request packet (S16 in FIG. 2). The AP 6 transfers the IP address allocation request packet to the router 9. The AP 6 and the router 9 having the DHCP server function receive the IP address assignment request packet. As a response to the IP address allocation request packet, the router 9 combines the candidate IP address IPb to be given to the MFP 10 and the address information of the router 9 (that is, the IP address of the router 9) ADDb (hereinafter referred to as “first address”). Is transmitted to the MFP 10. Note that the AP 6 transfers the first address combination to the MFP 10. As with the router 9, the AP 6 returns a combination of the candidate IP address IPa to be given to the MFP 10 and the address information of the AP 6 (that is, the IP address of the AP 6) ADDa as a response to the IP address assignment request packet (hereinafter referred to as “first”). 2 ”is transmitted to the MFP 10.

  After receiving the first address combination transmitted from the router 9, the MFP 10 receives the second address combination transmitted from the AP 6 (S18 in FIG. 2). After the MFP 10 transmits the IP address assignment request packet, the MFP 10 stores the candidate IP address IPb included in the first address combination received first in the target setting storage area 42 (S20 in FIG. 2). Further, the MFP 10 stores the address information ADDb included in the first address combination in the address information storage area 39 (S20 in FIG. 2). On the other hand, the MFP 10 does not store the second address combination received from the AP 6 in the storage areas 39 and 42.

  The MFP 10 broadcasts an allocation candidate IP address acquisition request packet including the candidate IP address IPb stored in the target setting storage area 42 (S22 in FIG. 2). The AP 6 transfers the allocation candidate IP address acquisition request packet to the router 9. Upon receiving the allocation candidate IP address acquisition request packet, the router 9 transmits an approval response to the MFP 10. Note that the AP 6 transfers the approval response to the MFP 10. When the MFP 10 receives the approval response from the router 9 (YES in S24 in FIG. 2), the MFP 10 stores the candidate IP address IPb in the designated setting storage area 36 as an IP address to be given to the MFP 10 (S26 in FIG. 2). As a result, the IP address IPb is set in the MFP 10 as the IP address of the MFP 10. The MFP 10 can execute infrastructure wireless communication by using the IP address IP as the IP address of the MFP 10.

  Next, the MFP 10 deletes the designated setting WS2 and the IP address IPb stored in the target setting storage area 42, and stores the initial setting WS1 in the target setting storage area 42 (S28 in FIG. 2). As a result, the MFP 10 switches from the infrastructure mode to the ad hoc mode.

  Subsequently, the MFP 10 sends the designated setting WS2 stored in the designated setting storage area 36 and the address information ADDb (that is, the IP address of the router 9) stored in the address information storage area 39 to the call device 70. Transmit (S30 in FIG. 2). The telephone device 70 is maintained in a state where the initial setting WS1 is stored in the target setting storage area 92 (that is, the ad hoc mode). Therefore, the calling device 70 can receive the designated setting WS2 and the address information ADDb from the MFP 10. When the call device 70 receives the designated setting WS2 and the address information ADDb (YES in S50 of FIG. 3), the call device 70 transmits a reception completion to the MFP 10 (S52 of FIG. 3).

  Upon receiving the reception completion for the designated setting WS2 and the address information ADDb, the MFP 10 determines YES in S32 of FIG. After the MFP 10 receives the address information ADDb from the router 9 in a state where the MFP 10 is in the infrastructure mode, the MFP 10 switches from the infrastructure mode to the ad hoc mode, and transmits the address information ADDb to the call device 70. According to this configuration, the MFP 10 can appropriately switch between the infrastructure mode and the ad hoc mode. In a modified example, the MFP 10 may transmit the designated setting WS2 to the calling device 70 and receive the completion of reception of the designated setting WS2 from the calling device 70. Then, the MFP 10 may transmit the address information ADDb to the call device 70 and receive from the call device 70 the completion of reception of the address information ADDb. In this case, when receiving the reception completion for the designated setting WS2 and the reception completion for the address information ADDb, the MFP 10 may determine YES in S32 of FIG.

  The MFP 10 deletes the initial setting WS1 stored in the target setting storage area 42 and stores the designated setting WS2 in the target setting storage area 42 (S10 in FIG. 2). As a result, the MFP 10 switches from the ad hoc mode to the infrastructure mode. Next, the MFP 10 transmits a connection request to the AP 6 (S12 in FIG. 2), executes authentication processing with the AP 6, and can execute wireless communication between the AP 6 and the infrastructure (YES in S14 in FIG. 2). In this configuration, after the MFP 10 is switched from the infrastructure mode to the ad hoc mode and transmits the designated setting WS2 and the address information ADDb, the MFP 10 is switched from the ad hoc mode to the infrastructure mode. According to this configuration, the MFP 10 does not have to switch the mode of the MFP 10 every time the designated setting WS2 and the address information ADDb are transmitted to the calling device 70.

  Next, the MFP 10 broadcasts an allocation candidate IP address acquisition request packet including the IP address IPb stored in the target setting storage area 42 (S34 in FIG. 2). The AP 6 transfers the allocation candidate IP address acquisition request packet to the router 9. At this time, the MFP 10 does not broadcast the IP address assignment request packet before broadcasting the assignment candidate IP address acquisition request packet. According to this configuration, the communication load of the wireless communication system 2 can be reduced.

  Upon receiving the allocation candidate IP address acquisition request packet, the router 9 transmits an approval response to the MFP 10. The MFP 10 receives the approval response from the router 9 (S36 in FIG. 2). Note that the AP 6 transfers the approval response to the MFP 10. According to this configuration, the MFP 10 can execute infrastructure wireless communication using the IP address IPb assigned before transmitting the address information ADDb of the router 9 to the call device 70. Therefore, it is possible to avoid changing the DHCP server that gives the IP address to the MFP 10 from the router 9 to another DHCP server.

  When the call device 70 transmits the reception completion to the MFP 10 (S52 in FIG. 3), the call device 70 deletes the initial setting WS1 stored in the target setting storage area 42 and puts the designated setting WS2 in the target setting storage area 42. Store (S54 in FIG. 3). Thereby, the telephone device 70 switches from the ad hoc mode to the infrastructure mode. Next, the call device 70 transmits a connection request to the AP 6 (S56 in FIG. 3), and the AP 6 executes an authentication process, and wireless communication between the AP 6 and the infrastructure can be performed (in S58 in FIG. 3). YES).

  The calling device 70 broadcasts an IP address assignment request packet (S60 in FIG. 3). The AP 6 transfers the IP address allocation request packet to the router 9. The AP 6 and the router 9 having the DHCP server function receive the IP address assignment request packet. In response to the IP address assignment request packet, the AP 6 transmits a combination of the candidate IP address IPc to be given to the communication device 70 and the address information of the AP 6 (that is, the IP address of the AP 6) ADDa to the call device 70.

  Since the received address information ADDa and the address information ADDb received from the MFP 10 do not match (NO in S64 in FIG. 3), the calling device 70 stores the candidate IP address IPc, the target setting storage area 92, and the specified setting storage. Not stored in area 86. For this reason, the candidate IP address IPc is not given as the IP address of the call device 70.

  Similarly to AP6, the router 9 uses a combination of the candidate IP address IPd to be given to the communication device 70 and the address information of the router 9 (that is, the IP address of the router 9) ADDb as a response to the IP address assignment request packet. To the communication device 70. The AP 6 transfers the combination of the candidate IP address IPd and the address information ADDb of the router 9 to the communication device 70. The calling device 70 stores the candidate IP address IPd in the target setting storage area 92 because the received address information ADDb matches the address information ADDb received from the MFP 10 (YES in S64 in FIG. 3).

  Next, the calling device 70 broadcasts an allocation candidate IP address acquisition request packet including the IP address IPd stored in the target setting storage area 42 (S68 in FIG. 3). The AP 6 transfers the allocation candidate IP address acquisition request packet to the router 9. When the router 9 receives the allocation candidate IP address acquisition request packet, the router 9 transmits an approval response to the call device 70. Note that the AP 6 transfers the approval response to the communication device 70. When the call device 70 receives the approval response from the router 9 (YES in S70 of FIG. 3), the candidate IP address IPd is stored in the designated setting storage area 86 as an IP address to be assigned to the call device 70 (FIG. 3). S72). As a result, the IP address IPd is set in the calling device 70 as the IP address of the calling device 70. The call device 70 can execute infrastructure wireless communication using the IP address IPd as the IP address of the call device 70.

  The call device 70 receives the address information ADDb from the MFP 10 in a state where the call device 70 is in the ad hoc mode, and then switches from the ad hoc mode to the infrastructure mode and receives the candidate IP address from the DHCP server. According to this configuration, the telephone device 70 can appropriately switch between the infrastructure mode and the ad hoc mode.

  Further, after transmitting the IP address assignment request packet, the calling device 70 first receives the candidate IP address IPc from the AP 6 and then receives the candidate IP address IPd from the router 9. The calling device 70 does not store the candidate IP address IPc in the designated setting storage area 86 because the address information ADDa of the AP 6 does not match the address information ADDb received from the MFP 10. Since the address information ADDb matches the address information ADDb received from the MFP 10, the candidate IP address IPd is stored in the designated setting storage area 86 as an IP address to be given to the call device 70 (S72 in FIG. 3). According to this configuration, the calling device 70 can acquire the IP address IPd from the router 9 that has given the MFP 10 the IP address IPb.

(Effect of this embodiment)
The MFP 10 transmits the address information ADDb of the router 9 which is the DHCP server from which the MFP 10 has acquired the IP address IPb, to the call device 70. According to this configuration, the MFP 10 can notify the calling device 70 of the DHCP server that is the transmission source of the IP address IPb given to the MFP 10. Using the address information ADDb, the calling device 70 can specify the DHCP server that is the transmission source of the IP address IPb given to the MFP 10. The calling device 70 assigns the IP address IPd received from the router 9 that is the DHCP server specified by the address information ADDb received from the MFP 10 as the IP address of the calling device 70. According to this configuration, an IP address can be assigned to the MFP 10 and the calling device 70 from the same DHCP server.

  For example, in the wireless communication system 2, the network address (for example, 192.168.2.0) of the IP address (for example, 192.168.2.XX) transmitted by the AP 6 as a response to the IP address allocation request packet is There is a situation different from the network address (for example, 192.168.11.0.0) of the IP address (for example, 192.168.11.YY.ZZ) transmitted as a response to the IP address allocation request packet. In this situation, the IP address (for example, 192.168.11.YY.ZZ) received from the router 9 is given to the MFP 10, while the IP address (for example, 192.168.8.2.XX) received from the AP 6 is When given to the calling device 70, a situation occurs in which the MFP 10 and the calling device 70 belong to different networks. In this case, the MFP 10 and the calling device 70 may not be able to execute infrastructure wireless communication.

  In this embodiment, since the MFP 10 and the calling device 70 can acquire the IP address to be assigned to each device from the same DHCP server, the MFP 10 and the calling device 70 have IP addresses having the same network address. An address can be given. For this reason, the possibility that the MFP 10 and the calling device 70 cannot perform infrastructure wireless communication can be reduced.

(Correspondence)
When the MFP 10 is an example of a “communication device”, the call device 70 is an example of a “specific communication device”. When the call device 70 is an example of a “communication device”, the MFP 10 is an example of a “specific communication device”. Infrastructure wireless communication is an example of “communication via a first communication path”, and ad hoc wireless communication is an example of “communication via a second communication path”. Each of the AP 6 and the router 9 is an example of “server”, and the router 9 is an example of “one server”. The AP 6 is an example of a “first server”, and the router 9 is an example of a “second server”. Each of the address information ADDa and ADDb is an example of “address information”, and the address information ADDb is an example of “specific address information”. The IP address IPb is an example of a “specific IP address”. The IP address IPc is an example of a “first IP address”, and the IP address IPd is an example of a “second IP address”.

  When the MFP 10 is an example of “communication device”, the case where the MFP 10 is in the infrastructure mode is an example of “first communication state”, and the case where the MFP 10 is in the ad hoc mode is an example of “second communication state”. It is. When the call device 70 is an example of “communication device”, the case where the call device 70 is in the infrastructure mode is an example of “first communication state”, and the case where the call device 70 is in the ad hoc mode is “second”. Is an example of “communication state”. The allocation candidate IP address acquisition request is an example of “information indicating that a specific IP address has been assigned”, and the IP address allocation request is an example of “a signal for transmitting address information”. The designated setting WS2 is an example of “setting information”.

  Specific examples of the present invention have been described in detail above, but these are merely examples and do not limit the scope of the claims. The technology described in the claims includes various modifications and changes of the specific examples illustrated above. For example, the following modifications may be adopted.

(Modification 1) In the above embodiment, the first communication unit 52 of the MFP 10 receives the IP address of the DHCP server in addition to the IP address to be assigned to the MFP 10 as a response to the IP address assignment request (FIG. 2). S18). The storage control unit 56 stores the received IP address of the DHCP server in the address information storage area 39 (S20 in FIG. 2). However, as a response to the IP address assignment request, the first communication unit 52 may receive at least one of the DHCP server's MAC address and network address together with or instead of the DHCP server's IP address. . In this case, the storage control unit 56 may store at least one MAC address received from the DHCP server in the address information storage area 39. In this modification, the address stored in the address information storage area 39 among at least one of the IP address of the DHCP server, the MAC address of the DHCP server, and the network address of the DHCP transmitted from the DHCP server is “address It is an example of “information”.

(Modification 2) The first communication unit 52 may receive the subnet mask of the IP address to be given to the MFP 10 from the DHCP server as a response to the IP address assignment request. In this case, the storage control unit 56 specifies the network address of the DHCP server from the received IP address and subnet mask to be assigned to the MFP 10, and stores the specified network address in the address information storage area 39. Also good. In this modification, the network address of the DHCP server is an example of “address information”. In this modification, the storage control unit 56 may store both the received IP address and subnet mask to be assigned to the MFP 10 in the address information storage area 39. In this case, the first communication unit 52 may transmit both the IP address and subnet mask to be assigned to the MFP 10 stored in the address information storage area 39 to the call device 70. In this modification, the subnet mask is an example of “address information”.

  When both the IP address to be assigned to the MFP 10 and the subnet mask are received, the calling device 70 specifies the network address of the DHCP server using the IP address to be assigned to the MFP 10 and the subnet mask. Also good. Then, the storage control unit 106 of the calling device 70 stores the IP address received from the DHCP server having the network address that matches the specified network address in the designated setting storage area 86 as the IP address of the calling device 70. May be.

(Modification 3) In the above embodiment, the first communication unit 52 receives a combination of the IP address to be assigned to the MFP 10 and the IP address of the DHCP server from the DHCP server (see S18 in FIG. 2). . However, the first communication unit 52 does not have to simultaneously receive the IP address to be assigned to the MFP 10 and the IP address of the DHCP server from the DHCP server. For example, the first communication unit 52 may receive an IP address to be given to the MFP 10 in S18 of FIG. Then, for example, the first communication unit 52 may receive the approval response and the IP address of the DHCP server in S24 of FIG. In general, the first communication unit receives address information related to the server and an IP address to be assigned to the communication device from each of the plurality of servers via the first communication path. However, the reception timing of the address information and the IP address may be simultaneous, continuous, or intermittent.

(Modification 4) In the above-described embodiment, the first communication unit 52 receives the IP address to be assigned to the MFP 10 and the IP address of the DHCP server from the DHCP server (see S18 in FIG. 2). A candidate IP address acquisition request is broadcast (see S22 in FIG. 2). However, the first communication unit 52 may not broadcast the allocation candidate IP address acquisition request at this timing. In this case, the storage control unit 56 may store the IP address of the DHCP server received in S <b> 18 of FIG. 2 in the memory 34, and may not store the IP address to be assigned to the MFP 10 in the memory 34. Then, the first communication unit 52 transmits the IP address of the DHCP server received in S18 of FIG. 2 to the call device 70 (see S30 of FIG. 2), and is switched from the ad hoc mode to the infrastructure mode. Thereafter, the IP address assignment request may be broadcast. When the IP address allocation request and the IP address of the DHCP server are received from a plurality of DHCP servers as a response to the IP address assignment request, the storage control unit 56 stores the DHCP server stored in the memory 34. An IP address transmitted from a DHCP server having an IP address that matches the IP address of the MFP 10 may be stored in the memory 34 as an IP address to be given to the MFP 10.

(Modification 5) In the above embodiment, the MFP 10 may be capable of executing infrastructure wireless communication and ad hoc wireless communication in parallel. For example, the MFP 10 may include a plurality of wireless interfaces. In this case, the MFP 10 performs infrastructure wireless communication using the first wireless interface of the plurality of wireless interfaces, and uses the second wireless interface of the plurality of wireless interfaces to perform ad hoc wireless communication. Communication may be performed. In this case, the MFP 10 does not have to switch between the infrastructure mode and the ad hoc mode.

(Modification 6) In the above embodiment, the first communication unit 52 transmits the IP address of the DHCP server received in S18 of FIG. 2 to the call device 70 (see S30 of FIG. 2), and After switching from the ad hoc mode to the infrastructure mode, the allocation candidate IP address acquisition request is broadcast without broadcasting the IP address allocation request (S34 in FIG. 2). However, the first communication unit 52 transmits the IP address of the DHCP server received in S18 of FIG. 2 to the call device 70 (see S30 of FIG. 2), and is switched from the ad hoc mode to the infrastructure mode. After that, the IP address assignment request may be broadcast. In this case, the storage control unit 56 may not store the received IP address in the memory 34 as a response to the IP address assignment request. The first communication unit 52 may broadcast an allocation candidate IP address acquisition request including the IP address stored in the memory 34 in S26 of FIG.

(Modification 7) The MFP 10 may receive an IP address from a DHCP server via a wired LAN. In this modification, the wired LAN is an example of a “first communication path”. Alternatively, the MFP 10 may execute communication with the telephone device 70 via a wired LAN. In the present modification, the wired LAN is an example of a “second communication path”. The communication via the first communication path and the communication via the second communication path may be communication in which setting information used by the communication device is different when executing communication. Alternatively, the communication via the first communication path and the communication via the second communication path may be communication using different interfaces used when the communication device executes communication.

(Modification 8) The “communication device” may be a printer, a scanner, a portable terminal, or the like in addition to the MFP 10. Further, the “communication device” may be a printer, a scanner, a portable terminal, or the like in addition to the call device 70.

(Modification 9) In the above-described embodiment, the units 52 to 58 of the MFP 10 are realized by the CPU 32 executing the program 44. Instead, at least a part of each of the units 52 to 58 may be realized by hardware such as a logic circuit. Similarly, in the above-described embodiment, the units 102 to 108 of the call device 70 are realized by the CPU 82 executing the program 96. Instead, at least a part of each of the units 102 to 108 may be realized by hardware such as a logic circuit.

  The technical elements described in this specification or the drawings exhibit technical usefulness alone or in various combinations, and are not limited to the combinations described in the claims at the time of filing. In addition, the technology illustrated in the present specification or the drawings achieves a plurality of objects at the same time, and has technical utility by achieving one of the objects.

2: wireless communication system, 6: access point, 7: FAX communication system, 9: router, 10: MFP, 36: designated setting storage area, 38: initial setting storage area, 39: address information storage area, 42: target setting Storage area, 52: first communication section, 54: second communication section, 56: storage control section, 58: switching section, 70: call device, 86: designated setting storage area, 88: initial setting storage area, 92 : Target setting storage area, 102: first communication unit, 104: second communication unit, 106: storage control unit, 108: switching unit

Claims (10)

It is possible to communicate with a plurality of servers for providing IP addresses to other communication devices via the first communication path, and a specific communication is performed via a second communication path different from the first communication path. A communication device capable of communicating with a communication device,
A first communication unit that receives address information related to the server and an IP address to be given to the communication device from each of the plurality of servers via the first communication path;
A storage control unit that stores, in a memory, specific address information received from one of the plurality of servers, and assigns a specific IP address received from the one server to the communication device The storage control unit for storing in the memory as an IP address to be
And a second communication unit that transmits the specific address information in the memory to the specific communication device different from the communication device via the second communication path.   The communication device according to claim 1, wherein the specific address information includes an address uniquely assigned to the one server. A first communication state capable of communicating with the plurality of servers via the first communication path and not communicable with the specific communication device via the second communication path; and the second communication. A state of the communication device in any one of a second communication state in which communication with the specific communication device is possible via a path and communication with the plurality of servers is not possible via the first communication route A switching unit for switching between
The switching unit changes the state of the communication device from the first communication state to the second communication after the specific address information is received from the one server via the first communication path. Switch to the state,
The second communication unit transmits the specific address information to the specific communication device via the second communication path after the state of the communication device is switched to the second communication state. The communication device according to claim 1 or 2. The switching unit switches the state of the communication device from the second communication state to the first communication state after the specific address information is transmitted,
The first communication unit receives information indicating that the communication device has been assigned the specific IP address after the state of the communication device is switched to the first communication state. The communication apparatus according to claim 3, wherein the communication apparatus transmits to the one server via a route. When the second communication unit transmits the specific address information to the specific communication device, setting information for the specific communication device to perform wireless communication with the access point is set to the specific communication device. To the communication device,
The switching unit switches the state of the communication device from the second communication state to the first communication state after the specific address information and the setting information are transmitted. The communication device described. The first communication unit transmits a signal for transmitting the address information to the plurality of servers,
The storage control unit stores address information received first among the address information received from each of the plurality of servers after the signal is transmitted as the specific address information in the memory. The communication device according to any one of claims 1 to 5, wherein: It is possible to communicate with a plurality of servers for providing IP addresses to other communication devices via the first communication path, and a specific communication is performed via a second communication path different from the first communication path. A computer program for a communication device capable of communicating with the communication device,
The computer program is stored in the communication device.
A first communication process for receiving address information related to the server and an IP address to be given to the communication device from each of the plurality of servers via the first communication path;
A storage control process for storing, in a memory, specific address information received from one of the plurality of servers, wherein the first IP address received from the one server is stored in the communication device. The storage control process for storing in the memory as an IP address to be assigned;
A computer program comprising: a second communication process for transmitting the specific address information in the memory to a specific communication device different from the communication device via the second communication path. It is possible to communicate with a plurality of servers for providing IP addresses to other communication devices via the first communication path, and a specific communication is performed via a second communication path different from the first communication path. A communication device capable of communicating with a communication device,
A first communication unit that receives address information related to the server and an IP address to be given to the communication device from each of the plurality of servers via the first communication path;
A second communication unit that receives specific address information related to one of the plurality of servers from a specific communication device via the second communication path;
The one server related to the specific address information among the IP addresses received from the plurality of servers using the specific address information and the address information received from each of the plurality of servers. A storage control unit that stores an IP address received from the memory as an IP address to be assigned to the communication device. A first communication state capable of communicating with the plurality of servers via the first communication path and not communicable with the specific communication device via the second communication path; and the second communication. A state of the communication device in any one of a second communication state in which communication with the specific communication device is possible via a path and communication with the plurality of servers is not possible via the first communication route A switching unit for switching between
The switching unit changes the state of the communication device from the second communication state to the first after the specific address information is received from the specific communication device via the second communication path. Switch to the communication status of
The first communication unit receives the IP address from each of the plurality of servers via the first communication path after the state of the communication device is switched to the first communication state. The communication apparatus according to claim 8. After the first IP address to be assigned to the communication device is received from the first server of the plurality of servers, the second server of the plurality of servers is assigned to the communication device. When a second IP address for receiving is received,
The storage control unit
When the address information related to the first server does not include the specific address information, and the address information related to the second server includes the specific address information,
The communication device according to claim 8 or 9, wherein the second IP address is stored in the memory as the IP address to be assigned to the communication device.

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