JP6575103B2 - Communication equipment - Google Patents

Description

  The present specification discloses a technique for performing wireless communication of facsimile data between a pair of communication devices.

  Patent Document 1 discloses a technique for executing wireless communication of facsimile data between an MFP and a BOX. Specifically, a wireless LAN is established between the MFP and the BOX. For example, the MFP transmits facsimile data to the BOX using the wireless LAN. The BOX transmits the facsimile data to the outside using a telephone line network.

JP 2011-114748 A

  The present specification discloses a new technique for performing wireless communication of facsimile data between a first communication device and a second communication device.

  A first communication device according to one aspect disclosed in the present specification includes a first interface for executing wireless communication according to a first communication method, and a second interface different from the first communication method. A second interface for executing wireless communication according to the communication method and a second instruction when a predetermined instruction for transmitting the first facsimile data to the second communication device is acquired. A notification transmission unit configured to transmit a first notification to the second communication device, wherein the first notification changes a state of a predetermined interface of the second communication device from the first state. , A notification for changing to a second state in which power consumption is higher than that in the first state, and the predetermined interface is configured so that the second communication device can perform wireless communication according to the first communication method. Run The notification transmission unit, which is an interface for receiving the first facsimile data from the first communication device, and the first interface via the first interface after the first notification is transmitted. A first establishing unit that establishes a wireless connection with the second communication device, and the first facsimile data through the first interface using the first wireless connection. A facsimile transmission unit that transmits the communication device.

  According to the above configuration, when the first communication device acquires the predetermined instruction, the first communication device transmits the first notification to the second communication device via the second interface, and the second communication device The state of the predetermined interface can be changed from the first state to the second state. For this reason, in the second communication device, the state of the predetermined interface can be the first state until the first notification is received from the first communication device, so that the state of the predetermined interface is always the first state. Compared with the configuration in the state 2, the power consumption can be reduced. Then, the first communication device establishes the first wireless connection via the first interface with the second communication device, and transmits the first facsimile data to the second communication device. As described above, the first communication device can perform wireless communication of facsimile data with the second communication device by using a novel technique that can reduce the power consumption of the second communication device.

  A second communication device according to one aspect disclosed in the present specification includes a first interface for executing wireless communication according to a first communication method, and a second interface different from the first communication method. A second interface for performing wireless communication according to the communication method, and the first communication via the second interface while the state of the first interface is the first state. A notification receiving unit that receives a first notification from a device, and when the first notification is received, the power consumption of the first interface is changed from the first state to the first state. A change unit for changing to a high second state; and after the state of the first interface is changed to the second state, the first wireless connection via the first interface is changed to the first communication. Establish with equipment And establishing unit that, by using the first wireless connection, via the first interface, and a facsimile receiving unit that receives the first facsimile data from the first communication device. The changing unit further changes the state of the first interface from the second state to the first state when reception of the first facsimile data from the first communication device is completed. To do. The power consumption of the second interface is lower than the power consumption of the first interface in the second state.

  According to the above configuration, when the second communication device receives the first notification from the first communication device, that is, in a situation where the first facsimile data is to be received, the state of the first interface is changed to the first communication device. In the situation where the first facsimile data should not be received although the status is changed to the status of 2, the status of the first interface is the first status. As a result, power consumption can be reduced compared to a configuration in which the state of the first interface is always in the second state. As described above, the second communication device can execute wireless communication of facsimile data with the first communication device by using a novel technique that can reduce the power consumption of the second communication device itself.

  A first communication device according to one aspect disclosed in the present specification includes a first interface for executing wireless communication according to a first communication method, and a second interface different from the first communication method. A second interface for executing wireless communication according to the communication method and a second instruction when a predetermined instruction for transmitting the first facsimile data to the second communication device is acquired. A notification transmission unit configured to transmit a first notification to the second communication device, wherein the first notification indicates a state of a predetermined interface of the second communication device and wireless communication is not performed. The notification is for changing from an impossible state to a state where wireless communication can be performed. The predetermined interface is configured so that the second communication device performs wireless communication according to the first communication method. Execution The notification transmitter, which is an interface for receiving the first facsimile data from the first communication device, and the first interface via the first interface after the first notification is transmitted. An establishing unit that establishes a first wireless connection with the second communication device; and the first facsimile data is transmitted to the second communication via the first interface using the first wireless connection. A facsimile transmission unit for transmitting to the device.

  According to the above configuration, when the first communication device acquires the predetermined instruction, the first communication device transmits the first notification to the second communication device via the second interface, and the second communication device The state of a predetermined interface can be changed from an impossible state to a possible state. For this reason, the first communication device can appropriately establish the first wireless connection via the first interface with the second communication device, and as a result, the first facsimile data is transmitted to the second communication device. It can be appropriately transmitted to the communication device. In this way, the first communication device executes wireless communication of facsimile data with the second communication device by using a novel technique capable of appropriately establishing the first wireless connection with the second communication device. be able to.

  A second communication device according to one aspect disclosed in the present specification includes a first interface for executing wireless communication according to a first communication method, and a second interface different from the first communication method. A second interface for executing wireless communication in accordance with the communication method of the above, and while the state of the first interface is in an impossible state where wireless communication cannot be executed, via the second interface , A notification receiving unit that receives a first notification from the first communication device, and when the first notification is received, wireless communication can be performed from the impossible state to the state of the first interface A change unit that changes to a possible state; and after the state of the first interface is changed to the possible state, a first wireless connection via the first interface is connected to the first communication device. Comprising a establishing unit to stand, by utilizing the first wireless connection, via the first interface, and a facsimile receiving unit that receives said first facsimile data from said first communication device, the. The changing unit further changes the state of the first interface from the possible state to the impossible state when reception of the first facsimile data from the first communication device is completed.

  According to the above configuration, in a situation where the first facsimile data should not be received, the state of the first interface is impossible, but the second communication device receives the first notification from the first communication device. In other words, when the first facsimile data is to be received, the state of the first interface is changed to a possible state. For this reason, the second communication device can appropriately establish the first wireless connection via the first interface with the first communication device, and as a result, the first communication device can receive the first communication from the first communication device. Facsimile data can be received appropriately. In this way, the second communication device executes wireless communication of facsimile data with the first communication device by using a novel technique capable of appropriately establishing the first wireless connection with the first communication device. be able to.

  A wireless communication system including the first communication device and the second communication device is also new and useful. Also, a control method, a computer program, and a computer-readable recording medium storing the computer program for realizing each of the first communication device and the second communication device are new and useful.

1 shows a configuration of a wireless communication system. 2 shows a flowchart of I / F control processing of a CD (ie, a call device) and an MFP (ie, a multi-function device). The flowchart of the FAX monitoring process of CD is shown. 2 is a flowchart of MFP FAX monitoring processing. A sequence diagram of case A including a state in which a BT connection is established and a state in which FAX data is transmitted from the CD to the MFP is shown. A sequence diagram of case B including a state in which FAX data is transmitted from the MFP to the CD and a state in which the BT connection is disconnected is shown.

(Configuration of wireless communication system 2)
As shown in FIG. 1, the wireless communication system 2 includes a multi-function device 10 (hereinafter referred to as “MFP (abbreviation of Multi-Function Peripheral)”) and a telephone device 50 (hereinafter abbreviated as “CD (abbreviation of Call Device)”. ) ”). The MFP 10 and the CD 50 are shipped as a set. In the drawings and the following, the facsimile is referred to as “FAX” for simplification of description.

(Configuration of MFP 10)
The MFP 10 is a peripheral device that can execute multiple functions including a printing function and a scan function, that is, a peripheral device such as a PC (abbreviated as Personal Computer 1) not shown. The MFP 10 includes an operation unit 12, a display unit 14, a Wi-Fi interface 20, a BT (Bluetooth (registered trademark) abbreviation) interface 22, a print execution unit 24, a scan execution unit 26, and a control unit 30. . Each part 12-30 is connected to a bus line (reference number omitted). Hereinafter, the interface is referred to as “I / F”.

  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 24 is a printing mechanism such as an inkjet method or a laser method. The scan execution unit 26 is a scan mechanism such as a CCD (abbreviation for Charge Coupled Device), CIS (abbreviation for Contact Image Sensor), or the like.

  The Wi-Fi I / F 20 is an I / F for executing wireless communication (hereinafter referred to as “Wi-Fi communication”) according to the Wi-Fi scheme. The Wi-Fi system conforms to, for example, IEEE (abbreviation of The Institute of Electrical and Electronics Engineers, Inc.) 802.11 standard and standards (for example, 802.11a, 11b, 11g, 11n, etc.). Based wireless communication scheme. More specifically, the Wi-Fi I / F 20 supports a WFD (abbreviation of Wi-Fi Direct (registered trademark)) method formulated by the Wi-Fi Alliance. The WFD method is a wireless communication method described in a standard document “Wi-Fi Peer-to-Peer (P2P) Technical Specification Version 1.1” created by Wi-Fi Alliance.

  The BTI / F 22 is an I / F for executing wireless communication (hereinafter referred to as “BT communication”) according to the Bluetooth method. The Bluetooth system is a wireless communication system based on, for example, the IEEE 802.15.1 standard and a standard conforming thereto. More specifically, the BTI / F 22 supports BLE (abbreviation for Bluetooth Low Energy). BLE is a standard realized by the version 4.0 or later of the Bluetooth system. In the following, Bluetooth version less than 4.0 is referred to as “classic BT”. In order to execute BT communication in accordance with BLE between a pair of BTI / Fs, one BTI / F corresponds to “Bluetooth Smart Ready” defined by the BT method, and the other BTI / F F may correspond to “Bluetooth Smart Ready” or “Bluetooth Smart” defined by the BT method. The BTI / F corresponding to “Bluetooth Smart Ready” is an I / F (that is, a so-called dual mode I / F) capable of executing both an operation according to BLE and an operation according to classic BT. A BTI / F corresponding to “Bluetooth Smart” is an I / F that can execute an operation according to BLE but cannot execute an operation according to classic BT. In this embodiment, BT communication according to BLE is executed between the MFP 10 and the CD 50. Both the BTI / F 22 of the MFP 10 and the BTI / F 62 of the CD 50 support “Bluetooth Smart Ready”. However, in a modified example, one of the BTI / F 22 of the MFP 10 and the BTI / F 62 of the CD 50 may correspond to “Bluetooth Smart Ready” and the other may correspond to “Bluetooth Smart”.

  Describe the differences between Classic BT and BLE. The number of BLE channels (ie 40) is less than the number of classic BT channels (ie 79). The current consumption (for example, 15 mA) during BLE data communication is smaller than the current consumption (for example, 35 mA) during classic BT data communication. Therefore, the power consumption of BLE is lower than the power consumption of classic BT. In BLE, Advertise signal is used, but in Classic BT, Advertise signal is not used.

  Differences between the Wi-Fi system and the BT system will be described. The communication speed of Wi-Fi communication (for example, the maximum communication speed is 600 Mbps) is faster than the communication speed of BT communication (for example, the maximum communication speed is 24 Mbps). The frequency of the carrier wave in Wi-Fi communication is the 2.4 GHz band or the 5.0 GHz band. The frequency of the carrier wave in BT communication is the 2.4 GHz band. That is, when the 5.0 GHz band is adopted as the carrier frequency in Wi-Fi communication, the carrier frequency in Wi-Fi communication is different from the carrier frequency in BT communication. Further, the maximum distance (for example, about 100 m) at which Wi-Fi communication can be performed is larger than the maximum distance (for example, about several tens of meters) at which BT communication can be performed.

  The control unit 30 includes a CPU 32 and a memory 34. The CPU 32 executes various processes according to the program 36 stored in the memory 34. The memory 34 is configured by a volatile memory, a nonvolatile memory, or the like. The memory 34 stores not only the program 36 but also Wi-Fi setting information WSI and BT setting information BSI in advance from the shipment stage of the MFP 10. The Wi-Fi setting information WSI is information for executing Wi-Fi communication with the CD 50 and includes, for example, various information such as an SSID (abbreviation of Service Set Identifier), an authentication method, an encryption method, and a password. . The BT setting information BSI is information for executing BT communication with the CD 50, and includes various information such as an authentication method, an encryption method, and a pass key. The memory 34 further stores a device name “N50” of the CD 50 in advance from the shipment stage of the MFP 10.

(Configuration of CD50)
The CD 50 includes a Wi-Fi I / F 60, a BTI / F 62, a PSTN (abbreviation of Public Switched Telephone Network) I / F 64, a control unit 70, and a handset 80. Each unit 60 to 70 is connected to a bus line (reference numeral omitted), and is provided in a housing not shown. The handset 80 can be attached to and detached from the housing.

  The Wi-Fi I / F 60 is an I / F for executing Wi-Fi communication, and supports WFD. The BTI / F 62 is an I / F for executing BT communication, and supports BLE. The difference between the Wi-Fi I / F 60 and the BTI / F 62 of the CD 50 is the same as the difference between the Wi-Fi I / F 20 and the BTI / F 22 of the MFP 10. The PSTNI / F 64 is connected to a PSTN that is a public line. More specifically, one end of a cable for PSTN is connected to PSTNI / F64. The other end of the cable is connected to a home PSTN socket, for example.

  The control unit 70 includes a CPU 72 and a memory 74. The CPU 72 executes various processes according to the program 76 stored in the memory 74. The memory 74 is configured by a volatile memory, a nonvolatile memory, or the like. The memory 74 stores not only the program 76 but also Wi-Fi setting information WSI and BT setting information BSI in advance from the shipment stage of the CD 50. The Wi-Fi setting information WSI and the BT setting information BSI in the memory 74 of the CD 50 are the same as the Wi-Fi setting information WSI and the BT setting information BSI in the memory 34 of the MFP 10, respectively. The memory 74 further stores in advance the device name “N10” of the MFP 10 from the shipment stage of the CD 50.

  The handset 80 includes a microphone 82, a speaker 84, and a CPU (not shown). Although not shown, each of the handset 80 and the above-described housing of the CD 50 includes an interface for performing wireless communication of audio data in accordance with the DECT (Digital Enhanced Cordless Telecommunication) standard. The user uses the handset 80 in a state in which the handset 80 is detached from the above-described housing, and makes a telephone call (not shown) connected to the PSTN via the above-described housing (that is, PSTNI / 62). Communication can be performed.

(FAX function)
The FAX function is realized by the MFP 10 and the CD 50 cooperating to execute the processing. For example, when receiving fax data from the fax machine 120 via the PSTNI / F64, the CD 50 transmits the fax data to the MFP 10 via the Wi-Fi I / F 60. When the MFP 10 receives FAX data from the CD 50 via the Wi-Fi I / F 20, the print execution unit 24 prints an image represented by the FAX data. Thereby, the FAX reception operation is realized.

  Further, for example, when the FAX apparatus 120 is designated as a FAX data transmission destination, the MFP 10 transmits FAX data obtained by executing scan of a document in the scan execution unit 26 via the Wi-Fi I / F 20. Send to CD50. When receiving fax data from the MFP 10 via the Wi-Fi I / F 60, the CD 50 transmits the fax data to the fax machine 120 via the PSTNI / F 64. Thereby, a FAX transmission operation is realized.

  As described above, the MFP 10 includes the print execution unit 24 that is a mechanism for printing an image represented by FAX data received from the PSTN, but the CD 50 does not include the mechanism. The MFP 10 includes a scan execution unit 26 that is a mechanism that scans a document and generates FAX data to be transmitted to the PSTN, but the CD 50 does not include the mechanism. Accordingly, the overall size of the MFP 10 is larger than the overall size of the CD 50.

  If a configuration in which a PSTN cable must be connected to the MFP 10 instead of the CD 50 (that is, a configuration in which the PSTNI / F is provided in the MFP 10) is adopted, user convenience may be impaired for the following reasons. That is, in the home, the position of the PSTN socket is predetermined. Since the MFP 10 has a relatively large size, it is difficult to install the MFP 10 near the PSTN socket in an environment where there is little space near the PSTN socket. In contrast, in the present embodiment, the PSTNI / F 64 is provided on the CD 50 having a relatively small size. Therefore, even in an environment where there is little space near the PSTN socket, the CD 50 can be easily installed near the PSTN socket and the CD 50 can be connected to the PSTN. Since the MFP 10 and the CD 50 can perform wireless communication of FAX data, the user can freely install the MFP 10 at a position away from the PSTN socket.

(I / F control processing of CD 50 and MFP 10; FIG. 2)
Next, an I / F control process executed by the CPU 72 of the CD 50 will be described with reference to FIG. 2 is described with the CPU 72 of the CD 50 as the subject, but the CPU 32 of the MFP 10 also executes the process of FIG. Then, when the CPU 32 of the MFP 10 executes a process different from the CPU 72 of the CD 50, this will be described. When the power of the CD 50 is turned on, the CPU 72 of the CD 50 starts the process of FIG. In the following, it is assumed that the power source of the CD 50 and the power source of the MFP 10 are turned on almost simultaneously.

  In S2, the CPU 72 of the CD 50 changes the Wi-Fi I / F 60 state from the OFF state to the ON state, and further changes the BTI / F 62 state from the OFF state to the ON state. Here, the “OFF state” is a state in which no power is supplied to the I / F, that is, a state in which wireless communication via the I / F cannot be performed. The “ON state” is a state in which power is supplied to the I / F, that is, a state in which wireless communication via the I / F can be performed. As will be described in detail later, while the CD 50 is powered on, the BTI / F 62 is always set to the ON state, but the Wi-Fi I / F 60 is in either the ON state or the OFF state. Is set. The power consumption of the BTI / F 62 is lower than the power consumption of the Wi-Fi I / F 60 in the ON state.

  In S <b> 2, the CPU 32 of the MFP 10 further voluntarily shifts the state of the MFP 10 to the G / O state of the WFD without executing WFD G / O (abbreviation of Group Owner) negotiation.

  In S <b> 4, the CPU 72 of the CD 50 establishes a wireless connection (hereinafter referred to as “Wi-Fi connection”) via the Wi-Fi I / F 60 with the MFP 10. Specifically, the CPU 72 transmits a Probe Request signal including the SSID included in the Wi-Fi setting information WSI in the memory 74 to the MFP 10 via the Wi-Fi I / F 60. Then, the CPU 72 receives a probe response signal from the MFP 10 via the Wi-Fi I / F 60, and further communicates various signals (for example, transmission of an authentication request signal, reception of an authentication response signal, transmission of an association request signal). , Reception of Association Response signal, 4-way handshake communication) is executed with the MFP 10. The CPU 72 transmits the authentication method, encryption method, and password included in the Wi-Fi setting information WSI in the memory 74 to the MFP 10 in the course of the communication of the various signals described above. Thereby, the CPU 72 can establish a Wi-Fi connection with the MFP 10. In particular, the CPU 72 sets the state of the CD 50 to the WFD client state, and participates in a wireless network (that is, a wireless LAN (abbreviation of Local Area Network)) in which the MFP 10 operates in the G / O state. Then, the CPU 72 acquires the network information (that is, the IP address of the MFP 10, the IP address of the CD 50, the subnet mask, etc.) to be used by the CD 50 from the MFP 10 in the G / O state, and stores the network information in the memory 74 of the CD 50. Remember me. Therefore, when the network information is stored in the memory 74, the CD 50 is in a Wi-Fi connection state in which a Wi-Fi connection is established with the MFP 10.

  In S4, the CPU 32 of the MFP 10 receives a Probe Request signal from the CD 50 via the Wi-Fi I / F 20, transmits a Probe Response signal to the CD 50, and further communicates various signals (for example, receives an Authentication Request signal). , Authentication Response signal transmission, Association Request signal reception, Association Response signal transmission, 4-way handshake communication) is performed with the CD 50. The CPU 32 receives the authentication method, the encryption method, and the password from the CD 50 in the course of the communication of the various signals described above, and the information is included in the Wi-Fi setting information WSI in the memory 34 of the MFP 10. It is determined whether or not it matches. That is, the CPU 32 executes authentication of the CD 50. As described above, since the MFP 10 and the CD 50 store the same Wi-Fi setting information WSI in advance, the CPU 32 determines that the authentication of the CD 50 is successful, and as a result, establishes a Wi-Fi connection with the CD 50. . In particular, the CPU 32 causes the CD 50 to participate as a client state in a wireless network in which the MFP 10 operates in the G / O state. Then, the CPU 32 generates network information to be used by the CD 50, transmits the network information to the CD 50, and further stores the network information in the memory 34 of the MFP 10. Therefore, when the network information is stored in the memory 34, the MFP 10 is in a Wi-Fi connection state in which a Wi-Fi connection is established with the CD 50.

  In a modified example, the CD 50 may shift to the WFD G / O state in S2, and in S4, the MFP 10 may join the wireless network in which the CD 50 operates in the G / O state as a client state. In another modified example, one of the MFP 10 and the CD 50 activates a so-called Soft AP in S2 (that is, starts an operation as an access point), and in S4, the one device operates as a Soft AP. The other device may participate in the wireless network.

  In S10, the CPU 72 of the CD 50 determines from the BT connection state where the wireless connection via the BTI / F 62 (hereinafter referred to as “BT connection”) is established with the MFP 10 to the BT disconnected state where the BT connection is not established with the MFP 10. It is determined whether or not it has changed. Note that the BT connection is established in S26 described later, and when the BT connection is established, the Wi-Fi I / F 60 is set to the OFF state in S28 described later. That is, in the BT connection state, the Wi-Fi connection is usually disconnected. For example, if a shielding object is installed between the CD 50 and the MFP 10, the communication environment of BT communication between the CD 50 and the MFP 10 is deteriorated, and as a result, the BT connection state can be changed to the BT disconnection state. Further, for example, when the CD 50 is moved to change the installation location of the CD 50, the distance between the CD 50 and the MFP 10 can be larger than the maximum distance at which BT communication can be performed. It can change to the BT disconnected state. CPU72 progresses to S12, when acquiring the information which shows the change from BT connection state to BT disconnection state from BTI / F62 (it is YES at S10).

  In S12, the CPU 72 of the CD 50 changes the state of the Wi-Fi I / F 60 from the OFF state to the ON state. Next, in S <b> 14, the CPU 72 establishes a Wi-Fi connection with the MFP 10 as in S <b> 4. When S14 ends, the process returns to S10. If the CPU 72 determines NO in S10, the process proceeds to S20.

  In S20, the CPU 72 of the CD 50 determines whether or not the state of the BTI / F 62 is a BT disconnected state. Specifically, when the CPU 72 inquires of the BTI / F 62 about the state of the BTI / F 62 and acquires information indicating the BT disconnection state from the BTI / F 62 (YES in S20), the CPU 72 proceeds to S22.

  In S22, the CPU 72 of the CD 50 broadcasts an Advertise signal including the device name “N50” of the CD 50 via the BTI / F 62. The Advertise signal is a signal for searching for a target device for BT connection. In S24, the CPU 72 determines whether the MFP 10 has been found. Specifically, when receiving a BT connection request from the MFP 10 via the BTI / F 62, the CPU 72 determines that the MFP 10 has been found (YES in S24), and proceeds to S26. On the other hand, if the CPU 72 does not receive a BT connection request from the MFP 10 after the Advertise signal is transmitted in S22 until a predetermined time elapses, the CPU 72 determines that the MFP 10 was not found (NO in S24), and S10. Return to.

  When the CPU 32 of the MFP 10 receives the Advertise signal from the CD 50 via the BTI / F 22, whether or not the device name “N50” in the Advertise signal is stored in the memory 34 in the process not shown in the figure. Judging. Since the device name “N50” is stored in the memory 34 (see FIG. 1), the CPU 32 determines that the device name “N50” is stored in the memory 34. As a result, in the process not shown, BTI A BT connection request is transmitted to the CD 50 via / F22. In this case, even if the CPU 32 determines YES in S20, it proceeds to S26 without executing S22 and S24.

  If the CPU 32 of the MFP 10 determines YES in S20 before receiving the Advertise signal from the CD 50, the Advertise signal including the device name “N10” of the MFP 10 is broadcasted via the BTI / F 22 in S22. In S24, it is determined whether or not the CD 50 is found. Then, similarly to the CPU 32 of the MFP 10, the CPU 72 of the CD 50 determines that the device name “N10” in the Advertise signal is stored in the memory 34 and transmits a BT connection request to the MFP 10. In this case, even if the CPU 72 determines YES in S20, it proceeds to S26 without executing S22 and S24.

  In S <b> 26, the CPU 72 of the CD 50 establishes a BT connection with the MFP 10. Specifically, the CPU 72 executes pairing with the MFP 10 using the BT setting information BSI in the memory 74. As described above, since the MFP 10 and the CD 50 store the same BT setting information BSI, pairing is successful, and as a result, the CPU 72 can establish a BT connection with the MFP 10.

  In S28, the CPU 72 of the CD 50 changes the state of the Wi-Fi I / F 60 from the ON state to the OFF state. Then, the CPU 72 deletes the network information in the memory 74. As a result, the Wi-Fi connection between the CD 50 and the MFP 10 is disconnected. Since the Wi-Fi I / F 60 of the CD 50 is changed to the OFF state in S28, the power consumption of the CD 50 can be reduced. Similarly, since the Wi-Fi I / F 20 of the MFP 10 is changed to the OFF state in S28, the power consumption of the MFP 10 can be reduced. When S28 ends, the process returns to S10. When the CPU 72 of the CD 50 determines NO in S10 and further determines NO in S20 (that is, determines that the BT connection is established), the process proceeds to S30.

  In S <b> 30, the CPU 72 of the CD 50 determines whether an activation notification is received from the MFP 10 via the BTI / F 22 using the BT connection. The activation notification is a notification for changing the state of the Wi-Fi I / F 60 from the OFF state to the ON state (that is, a notification for starting the Wi-Fi I / F 60). CPU72 progresses to S32, when acquiring the information which shows reception of starting notification from BTI / F22 (it is YES at S30). If the CPU 72 determines NO in S30, it returns to S10.

  In S32, the CPU 72 of the CD 50 changes the state of the Wi-Fi I / F 60 from the OFF state to the ON state. Next, in S <b> 34, the CPU 72 establishes a Wi-Fi connection with the MFP 10 as in S <b> 4. When S34 ends, the process returns to S10.

(CD50 FAX monitoring process; Fig. 3)
Next, the FAX monitoring control process executed by the CPU 72 of the CD 50 will be described with reference to FIG. When the power of the CD 50 is turned on, the CPU 72 starts the process of FIG.

  In S100, the CPU 72 monitors reception of FAX data via the PSTNI / F64. When receiving FAX data, the CPU 72 determines YES in S100, and proceeds to S102. Receiving the FAX data (that is, YES in S100) can be said to be processing for acquiring an instruction for transmitting the FAX data to the MFP 10 in order to cause the MFP 10 to print the image represented by the FAX data.

  In S <b> 102, the CPU 72 determines whether or not the CD 50 is in a Wi-Fi connection state in which a Wi-Fi connection is established with the MFP 10. When the network information is stored in the memory 74, the CPU 72 determines that the Wi-Fi connection state is set (YES in S102), proceeds to S120, and when the network information is not stored in the memory 74. Determines that it is not in the Wi-Fi connection state (NO in S102), and proceeds to S104.

  In S104, the CPU 72 transmits an activation notification to the MFP 10 via the BTI / F 62 using the BT connection established in S26 of FIG. Thus, the CPU 72 can cause the MFP 10 to execute processing for establishing a Wi-Fi connection (see S32 and S34 in FIG. 2).

  In S106, the CPU 72 changes the state of the Wi-Fi I / F 60 from the OFF state to the ON state. Next, in S <b> 108, the CPU 72 establishes a Wi-Fi connection with the MFP 10. S108 is the same as S4 of FIG.

  In S110, the CPU 72 transmits FAX data to the MFP 10 via the Wi-Fi I / F 60 using the Wi-Fi connection established in S108. Specifically, the CPU 72 acquires the IP address of the MFP 10 from the network information in the memory 74, and transmits FAX data using the IP address as a transmission destination. Accordingly, the CPU 72 can cause the MFP 10 to execute a printing process according to the FAX data (see S232 in FIG. 4 described later).

  A configuration in which FAX data is communicated between the MFP 10 and the CD 50 using BT communication is conceivable. However, the data size of FAX data may be large, and the communication speed of BT communication is slower than the communication speed of Wi-Fi communication. Therefore, if a configuration in which FAX data is communicated using BT communication is employed, it may take a long time for FAX data communication. On the other hand, in the present embodiment, since the FAX data is communicated by executing Wi-Fi communication, the FAX data can be communicated quickly.

  When the transmission of FAX data to the MFP 10 is completed, the CPU 72 changes the state of the Wi-Fi I / F 60 from the ON state to the OFF state in S112. As a result, the Wi-Fi connection between the MFP 10 and the CD 50 is disconnected. Since the Wi-Fi I / F 60 of the CD 50 is changed to the OFF state in S112, the power consumption of the CD 50 can be reduced. When S112 ends, the process returns to S100.

  On the other hand, in S120 (that is, in the case where it is determined that the Wi-Fi connection state is determined in S102), the CPU 72 uses the Wi-Fi connection via the Wi-Fi I / F 60 without executing S104 to S108. Then, the FAX data is transmitted to the MFP 10. Accordingly, the CPU 72 can cause the MFP 10 to execute a printing process according to the FAX data (see S232 in FIG. 4 described later). Then, the CPU 72 returns to S100 without executing S112, that is, without changing the state of the Wi-Fi I / F 60 to the OFF state. In this case, the Wi-Fi connection between the MFP 10 and the CD 50 is maintained without being disconnected.

  If the CPU 72 determines NO in S100, it proceeds to S130. In S <b> 130, the CPU 72 monitors the reception of FAX data from the MFP 10 via the Wi-Fi I / F 60 using the Wi-Fi connection. When receiving the FAX data, the CPU 72 determines YES in S130 and proceeds to S132. When receiving the FAX data, the CPU 72 further receives a FAX number of the FAX data transmission destination (for example, the FAX number of the FAX apparatus 120 in FIG. 1) from the MFP 10.

  In S132, the CPU 72 calls the received FAX number. Next, the CPU 72 transmits FAX data via the PSTNI / F 64 (that is, via the PSTN). Thereby, a FAX transmission operation is realized.

  In S134, the CPU 72 determines whether or not the state of the BTI / F 62 is a BT connection state. Specifically, when the CPU 72 inquires of the BTI / F 62 about the state of the BTI / F 62 and acquires information indicating the BT connection state from the BTI / F 62 (YES in S134), the CPU 72 proceeds to S136. In S136, the CPU 72 changes the state of the Wi-Fi I / F 60 from the ON state to the OFF state. As a result, the Wi-Fi connection between the MFP 10 and the CD 50 is disconnected. Since the Wi-Fi I / F 60 of the CD 50 is changed to the OFF state in S136, the power consumption of the CD 50 can be reduced. When S136 ends, the process returns to S100.

  On the other hand, when acquiring information indicating the BT disconnection state from the BTI / F 62 (NO in S134), the CPU 72 does not execute S136, that is, without changing the Wi-Fi I / F 60 state to the OFF state. , Return to S100. In this case, the Wi-Fi connection between the MFP 10 and the CD 50 is maintained without being disconnected.

(FAX monitoring process of MFP 10; FIG. 4)
Next, the FAX monitoring control process executed by the CPU 32 of the MFP 10 will be described with reference to FIG. When the power of the MFP 10 is turned on, the CPU 32 starts the process of FIG.

  In S <b> 200, the CPU 32 monitors whether a FAX transmission operation for the operation unit 12 is accepted. The FAX transmission operation includes an operation for inputting the FAX number of the FAX data transmission destination and an operation for pressing the FAX start button. CPU32 progresses to S201, when receiving FAX transmission operation (it is YES at S200). Acceptance of the FAX transmission operation (that is, YES in S200) can be said to be processing for acquiring an instruction for transmitting the FAX data to the CD 50 in order to cause the CD 50 to execute transmission of FAX data to the PSTN.

  In S <b> 201, the CPU 32 supplies a scan instruction to the scan execution unit 26, and causes the scan execution unit 26 to scan a document. Then, the CPU 32 acquires a scan result from the scan execution unit 26 and generates FAX data using the scan result. For example, the CPU 32 generates FAX data having a format (for example, G3, G4, etc.) that can be transmitted via the PSTN.

  S202 to S212 and S220 are the same as S102 to S112 and S120 of FIG. 3 except that the execution subject of the process is not the CPU 72 of the CD 50 but the CPU 32 of the MFP 10. However, in S210 and S220, the CPU 32 transmits the FAX data generated in S201 and the FAX number input in S200 to the CD 50. As a result, the CPU 32 can cause the CD 50 to execute transmission of FAX data to the PSTN (see S132 in FIG. 3). Since the Wi-Fi I / F 20 of the MFP 10 is changed to the OFF state in S212, the power consumption of the MFP 10 can be reduced. When S212 or S220 ends, the process returns to S200.

  If the CPU 72 determines NO in S200, it proceeds to S230. In S230, the CPU 32 monitors reception of FAX data (see S110 or S120 in FIG. 3) from the CD 50 via the Wi-Fi I / F 60 using the Wi-Fi connection. When receiving the FAX data, the CPU 32 determines YES in S230, and proceeds to S232.

  In S232, the CPU 32 converts the FAX data to generate print data having a data format that can be interpreted by the print execution unit 24. Then, the CPU 32 supplies the print data to the print execution unit 24 and causes the print execution unit 24 to print an image represented by the print data, that is, an image represented by the FAX data. Thereby, the FAX reception operation is realized.

  S234 and S236 are the same as S134 and S136 of FIG. 3 except that the execution subject of the process is not the CPU 72 of the CD 50 but the CPU 32 of the MFP 10. Since the Wi-Fi I / F 20 of the MFP 10 is changed to the OFF state in S236, the power consumption of the MFP 10 can be reduced. If NO in S234, or if S236 ends, the process returns to S200.

(Specific case)
Next, with reference to FIG. 5 and FIG. 6, specific cases realized by the processes of FIGS. 2 to 4 will be described. 5 and 6, thick line arrows and thin line arrows between the MFP 10 and the CD 50 indicate Wi-Fi communication and BT communication, respectively. A thin line arrow between the CD 50 and the FAX apparatus 120 indicates communication via the PSTN.

(Case A; FIG. 5)
In A1, the power of the MFP 10 is turned on by the user. In this case, in T10, the MFP 10 changes each of the Wi-Fi I / F 20 and the BTI / F 22 to the ON state (S2 in FIG. 2).

  In A2, the power source of the CD 50 is turned on by the user. In this case, at T12, the CD 50 changes each of the Wi-Fi I / F 60 and the BTI / F 62 to the ON state (S2 in FIG. 2).

  At T14, a Wi-Fi connection is established between the MFP 10 and the CD 50 (S4 in FIG. 2). Thereafter, the MFP 10 broadcasts an advertise signal including the device name “N10” of the MFP 10 at T20 (S22), and receives a BT connection request from the CD 50 at T22 (YES at S24). As a result, a BT connection is established between the MFP 10 and the CD 50 (S26). In case A of FIG. 5, the timing at which the MFP 10 transmits the Advertise signal is earlier than the timing at which the CD 50 transmits the Advertise signal. As a result, the CD 50 receives the Advertise signal from the MFP 10 and issues a BT connection request. Transmit to the MFP 10. However, in another case, the CD 50 may broadcast the Advertise signal and the MFP 10 may send a BT connection request to the CD 50.

  In T30, the MFP 10 changes the Wi-Fi I / F 20 to the OFF state (S28 in FIG. 2). At T32, the CD 50 changes the Wi-Fi I / F 60 to the OFF state (S28). As a result, at T34, the Wi-Fi connection between the MFP 10 and the CD 50 is disconnected. That is, the BT connection is established between the MFP 10 and the CD 50, but the Wi-Fi connection is disconnected.

  At T40, the CD 50 receives the FAX data D1 from the FAX apparatus 120 via the PSTN (YES in S100 of FIG. 3). In this case, the CD 50 transmits a startup notification to the MFP 10 using the BT connection at T42 (NO in S102, S104), and changes the Wi-Fi I / F 60 to the ON state at T44 (S106).

  When the MFP 10 receives the activation notification from the CD 50 using the BT connection (YES in S30 of FIG. 2), the Wi-Fi I / F 20 is changed to the ON state at T50 (S32). At T52, a Wi-Fi connection is established between the MFP 10 and the CD 50 (S34 in FIG. 2, S108 in FIG. 3).

  At T60, the CD 50 transmits the FAX data D1 to the MFP 10 using the Wi-Fi connection established at T52 (S110 in FIG. 3).

  When the MFP 10 receives the FAX data D1 from the CD 50 using the Wi-Fi connection (YES in S230 of FIG. 4), the MFP 10 prints an image represented by the FAX data D1 in T62 (S232). Thereby, the FAX reception operation is realized.

  In T70, the MFP 10 changes the Wi-Fi I / F 20 to the OFF state (YES in S234 in FIG. 4, S236). At T72, the CD 50 changes the Wi-Fi I / F 60 to the OFF state (S112 in FIG. 3). As a result, at T74, the Wi-Fi connection between the MFP 10 and the CD 50 is disconnected.

(Case B; FIG. 6)
In the initial state of case B in FIG. 6, the BT connection is established between the MFP 10 and the CD 50, but the Wi-Fi connection is disconnected.

  In A3, a FAX transmission operation is executed on the MFP 10 (YES in S200 of FIG. 4). In this case, the MFP 10 scans the document at T100 to generate FAX data D2 (S201 in FIG. 4), and transmits a startup notification to the CD 50 using the BT connection at T102 (NO at S202). , S204), at T104, the Wi-Fi I / F 20 is changed to the ON state (S206).

  When the CD 50 receives the activation notification from the MFP 10 using the BT connection (YES in S30 of FIG. 2), the Wi-Fi I / F 60 is changed to the ON state in T110 (S32). In T112, a Wi-Fi connection is established between the MFP 10 and the CD 50 (S34 in FIG. 2 and S208 in FIG. 4).

  In T120, the MFP 10 transmits the FAX data D2 and the FAX number of the FAX apparatus 120 to the CD 50 using the Wi-Fi connection established in T112 (S210 in FIG. 4).

  When the CD 50 receives the FAX data D2 and the FAX number from the MFP 10 using the Wi-Fi connection (YES in S130 of FIG. 3), the CD 50 transmits the FAX data D2 to the FAX apparatus 120 via the PSTN at T122. (S132). Thereby, a FAX transmission operation is realized.

  In T130, the MFP 10 changes the Wi-Fi I / F 20 to the OFF state (S212 in FIG. 4). Further, at T132, the CD 50 changes the Wi-Fi I / F 60 to the OFF state (YES in S134 of FIG. 3, S136). As a result, at T134, the Wi-Fi connection between the MFP 10 and the CD 50 is disconnected.

  At T140, the communication environment for BT communication between the MFP 10 and the CD 50 deteriorates, and as a result, the BT connection between the MFP 10 and the CD 50 is disconnected (YES in S10 of FIG. 2). In this case, in T141, the MFP 10 changes the Wi-Fi I / F 20 to the ON state (S12). In T142, the CD 50 changes the Wi-Fi I / F 60 to the ON state (S12). As a result, in T144, a Wi-Fi connection is established between the MFP 10 and the CD 50 (S14).

  At T150, the CD 50 receives the FAX data D3 from the FAX apparatus 120 via the PSTN (YES in S100 of FIG. 3). In this case, the CD 50 transmits the FAX data D3 to the MFP 10 using the Wi-Fi connection established in T144 at T160 without transmitting the activation notification to the MFP 10 (YES in S102) (S120).

  When the MFP 10 receives the FAX data D3 from the CD 50 using the Wi-Fi connection (YES in S230 of FIG. 4), the MFP 10 prints an image represented by the FAX data D3 in T162 (S232). Thereby, the FAX reception operation is realized. Thereafter, the MFP 10 does not change the Wi-Fi I / F 20 to the OFF state (NO in S234 in FIG. 4), and the CD 50 does not change the Wi-Fi I / F 60 to the OFF state (S112 after S120 in FIG. 3). Do not run). That is, the Wi-Fi connection between the MFP 10 and the CD 50 is maintained.

  In A4, a FAX transmission operation is executed on the MFP 10 (YES in S200 of FIG. 4). In this case, the MFP 10 scans the document at T170 to generate FAX data D4 (S201), and does not send a startup notification to the CD 50 (YES at S202). At T180, the Wi established at T144 is established. -Using the Fi connection, the FAX data D4 and the FAX number are transmitted to the CD 50 (S220).

  When the CD 50 receives the FAX data D4 and the FAX number from the MFP 10 using the Wi-Fi connection (YES in S130 of FIG. 3), the CD 50 transmits the FAX data D4 to the FAX apparatus 120 via the PSTN at T182. (S132). Thereby, a FAX transmission operation is realized. Thereafter, the MFP 10 does not change the Wi-Fi I / F 20 to the OFF state (does not execute S212 after S220 in FIG. 4), and the CD 50 does not change the Wi-Fi I / F 60 to the OFF state (S134 in FIG. 3). NO). That is, the Wi-Fi connection between the MFP 10 and the CD 50 is maintained.

(Effect of Example)
As shown in case A of FIG. 5, the CD 50 uses the BT connection when receiving FAX data D1 from the PSTN (T40), that is, when obtaining an instruction to transmit the FAX data D1 to the MFP 10. Then, the activation notification is transmitted to the MFP 10 (T42). Then, the CD 50 establishes a Wi-Fi connection with the MFP 10 (T52), and transmits the FAX data D1 to the MFP 10 (T60). Thereby, the FAX reception operation is realized. As shown in case B of FIG. 6, the MFP 10 uses the BT connection when receiving a FAX transmission operation (A3), that is, when acquiring an instruction to transmit the FAX data D2 to the CD 50. The activation notification is transmitted to the CD 50 (T102). Then, the MFP 10 establishes a Wi-Fi connection with the CD 50 (T112), and transmits the FAX data D2 to the CD 50 (T120). Thereby, a FAX transmission operation is realized.

  As described above, since the activation notification is communicated between the MFP 10 and the CD 50 using the BT connection, the MFP 10 is in a situation where the FAX data D1 and D2 are to be communicated, and Wi-FiI. / F20 is changed to the ON state (that is, the state in which Wi-Fi communication can be executed), but in a situation where the FAX data D1 and D2 should not be communicated, the Wi-Fi I / F 20 is turned off (that is, the Wi-Fi communication is not performed) It can be set to an inexecutable state. For this reason, the power consumption of the MFP 10 can be reduced.

  In addition, since the configuration in which the activation notification is communicated between the MFP 10 and the CD 50 using the BT connection is adopted, the CD 50 uses the Wi-Fi I / F 60 in a situation where the FAX data D1 and D2 should be communicated. Change to ON state (ie Wi-Fi communication is executable), but in situations where FAX data D1 and D2 should not be communicated, Wi-Fi I / F 60 is turned off (ie Wi-Fi communication cannot be executed) Can be set. For this reason, the power consumption of the CD 50 can be reduced.

  Further, as shown in case B of FIG. 6, when the BT connection is disconnected between the MFP 10 and the CD 50 (T140), the activation notification communication cannot be performed using the BT connection. A Wi-Fi connection is established between the MFP 10 and the CD 50 (T144). For this reason, even when the BT connection cannot be established, the MFP 10 and the CD 50 can appropriately execute the communication of the FAX data D3 and D4 using the Wi-Fi connection.

(Correspondence)
The Wi-Fi method and the Wi-Fi I / F 20, 60 are examples of the “first communication method” and the “first interface”, respectively. The BT method and the BTI / F 22, 62 are examples of the “second communication method” and the “second interface”, respectively. The PSTNI / F64 is an example of a “third interface”. The OFF state is an example of “first state” and “impossible state”, and the ON state is an example of “second state” and “possible state”.

  In one form of the present embodiment, the CD 50 is an example of a “first communication device”, and the MFP 10 is an example of a “second communication device”. In this case, the following correspondence is obtained. The Wi-Fi I / F 20 of the MFP 10 is an example of a “predetermined interface”. Receiving the FAX data D1 at T40 in FIG. 5 is an example of “when a predetermined instruction is acquired”. The activation notification communicated at T42 in FIG. 5 and the activation notification communicated at T102 in FIG. 6 are examples of “first notification” and “second notification”, respectively. The Wi-Fi connection established at T52 in FIG. 5, the BT connection established at T24, the Wi-Fi connection established at T144 in FIG. 6, and the Wi-Fi connection established at T112 are respectively “first”. Are "wireless connection", "second wireless connection", "third wireless connection", and "fourth wireless connection". The FAX data D1 communicated at T60 in FIG. 5 and the FAX data D2 communicated at T120 in FIG. 6 are examples of “first facsimile data” and “second facsimile data”, respectively.

  In another form of the present embodiment, the MFP 10 is an example of a “first communication device”, and the CD 50 is an example of a “second communication device”. In this case, the following correspondence is obtained. The Wi-Fi I / F 60 of the CD 50 is an example of “predetermined interface”. Accepting a FAX transmission operation at A3 in FIG. 6 is an example of “when a predetermined instruction is acquired”. The activation notification communicated at T102 in FIG. 6 and the activation notification communicated at T42 in FIG. 5 are examples of “first notification” and “second notification”, respectively. Wi-Fi connection established at T112 in FIG. 6, BT connection established at T24 in FIG. 5, Wi-Fi connection established at T144 in FIG. 6, Wi-Fi connection established at T52 in FIG. , Respectively, are examples of “first wireless connection”, “second wireless connection”, “third wireless connection”, and “fourth wireless connection”. The FAX data D2 communicated at T120 in FIG. 6 and the FAX data D1 communicated at T60 in FIG. 5 are examples of “first facsimile data” and “second facsimile data”, respectively.

  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. The modifications of the above embodiment are listed below.

(Modification 1) The CD 50 may maintain the Wi-Fi I / F 60 in the ON state without changing the Wi-Fi I / F 60 to the OFF state while the power is on. That is, the CD 50 does not have to execute S12, S28, S30 to S34 in FIG. 2 and S106, S108, S134, and S136 in FIG. That is, when the CD 50 is an example of “first communication device”, “first change unit”, “third establishment unit”, “notification reception unit”, “second change unit”, and , “Fourth establishment unit” can be omitted. Further, the MFP 10 may maintain the Wi-Fi I / F 20 in the ON state without changing the Wi-Fi I / F 20 to the OFF state while the power is on. That is, the MFP 10 does not have to execute S12, S28, S30 to S34 in FIG. 2, and S206, S208, S234, and S236 in FIG. That is, when the MFP 10 is an example of “first communication device”, “first change unit”, “third establishment unit”, “notification reception unit”, “second change unit”, and , “Fourth establishment unit” can be omitted.

(Modification 2) The BT connection may not be established in advance between the MFP 10 and the CD 50. That is, the CD 50 may execute S22 to S26 of FIG. 2 to establish a BT connection with the MFP 10 when YES in S100 of FIG. 3 and NO in S102, and then execute S104 to S112. Further, when YES in S200 in FIG. 4 and NO in S202, the MFP 10 may execute S22 to S26 in FIG. 2 to establish the BT connection with the CD 50, and then execute S204 to S212. In other words, the “second establishment unit” can be omitted. Generally speaking, the “notification transmission unit” can transmit the first notification to the second communication device via the second interface. Good.

(Modification 3) In the above embodiment and modification 2, the activation notification is communicated between the MFP 10 and the CD 50 using the BT connection. Instead of this, for example, in the case of YES in S100 of FIG. 3 and NO in S102, the CD 50 broadcasts an Advertise signal including the device name “N50” of the CD 50 instead of executing S104. When the MFP 10 receives the Advertise signal from the CD 50 and the device name “N50” in the Advertise signal is stored in the memory 34, the MFP 10 changes the Wi-Fi I / F 20 to the ON state (FIG. 2). S32), a Wi-Fi connection is established with the CD 50 (S34). In addition, when YES in S200 of FIG. 4 and NO in S202 of FIG. 4, the MFP 10 broadcasts an Advertise signal including the device name “N10” of the MFP 10 instead of executing S204. Then, the CD 50 receives the Advertise signal from the MFP 10 and changes the Wi-Fi I / F 60 to the ON state when the device name “N10” in the Advertise signal is stored in the memory 74 (FIG. 2). S32), a Wi-Fi connection is established with the MFP 10 (S34). In this modification, when the CD 50 is an example of the “first communication device”, the Advertise signal broadcast-transmitted from the CD 50 to the MFP 10 and the Advertise signal broadcast-transmitted from the MFP 10 to the CD 50 are respectively “first”. Are “notification” and “second notification”. When the MFP 10 is an example of the “first communication device”, the Advertise signal broadcast-transmitted from the MFP 10 to the CD 50 and the Advertise signal broadcast-transmitted from the CD 50 to the MFP 10 are respectively “first notification”. , Is an example of “second notification”.

(Modification 4) In the above embodiment, the “first state” of the “first interface” and the “predetermined interface” is a state in which power is not supplied to the interface. Alternatively, the “first state” may be a state in which a small amount of power is supplied to the interface. In this case, the “first state” may be a state where wireless communication via the interface can be performed, or a state where wireless communication via the interface cannot be performed. However, in the former case, for example, the “first state” may be a state in which the communication speed is slower than the “second state”. In the former case, for example, in the “first state”, communication in an upper layer (for example, an application layer) that is higher than the data link layer of the OSI reference model cannot be executed, and the OSI reference model It may be in a state in which lower layer communication below the data link layer can be executed.

(Modification 5) The “first interface” does not have to be an I / F for executing Wi-Fi communication, but for executing wireless communication according to another communication method capable of constructing a wireless LAN. It may be I / F. In addition, the “second interface” may not be an I / F for executing BT communication. For example, another communication method (for example, TransferJet (registered trademark)) that can execute short-range wireless communication is used. It may be an I / F for executing the following wireless communication.

(Modification 6) In the above embodiment, the CPU 72 in the control unit 70 of the CD 50 transmits an activation notice to the MFP 10 in S104 of FIG. Instead, for example, the BTI / F 62 includes a CPU and a memory, and the memory may store a program in advance. Then, when the CPU in the BTI / F 62 obtains information indicating that YES is determined in S102 of FIG. 3 from the CPU 72 in the control unit 70, according to the program stored in the memory in the BTI / F 62, An activation notification may be transmitted to the MFP 10. Similarly, the CPU in the BTI / F 22 of the MFP 10 is stored in the memory in the BTI / F 22 when acquiring information indicating that YES is determined in S202 of FIG. 4 from the CPU 32 in the control unit 30. The activation notification may be transmitted to the CD 50 according to the program. Generally speaking, each of the “first communication device” and the “second communication device” includes two or more processors (for example, the CPU 72 in the control unit 70 of the CD 50 and the CPU in the BTI / F 62), Two or more memories (for example, a memory 74 in the control unit 70 of the CD 50 and a memory in the BTI / F 62) may be provided, and each processor executes processing according to each program stored in each memory. May be.

(Modification 7) When the CPU 32 of the MFP 10 and the CPU 72 of the CD 50 execute the programs 36 and 76 (that is, software), the processes shown in FIGS. 2 to 6 are realized. Instead, at least one of the processes in FIGS. 2 to 6 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.
The features of the technology described in this specification are listed below.
(Item 1)
A first communication device,
A first interface for executing wireless communication according to the first communication method;
A second interface for executing wireless communication according to a second communication method different from the first communication method;
Notification transmission for transmitting a first notification to the second communication device via the second interface when a predetermined instruction for transmitting the first facsimile data to the second communication device is acquired. The first notification changes the state of the predetermined interface of the second communication device from the first state to a second state with higher power consumption than the first state. And the predetermined interface is configured such that the second communication device performs wireless communication according to the first communication method, and the first facsimile data is received from the first communication device. The notification transmitter, which is an interface for receiving;
A first establishing unit that establishes a first wireless connection with the second communication device via the first interface after the first notification is transmitted;
A facsimile transmission unit that transmits the first facsimile data to the second communication device via the first interface using the first wireless connection;
A first communication device comprising:
(Item 2)
The first communication device further includes:
When the predetermined instruction is acquired while the state of the first interface is the first state, the power consumption of the state of the first interface is changed from the first state to the first state. A first changing unit for changing to a high second state;
The first establishing unit establishes the first wireless connection with the second communication device via the first interface after the state of the first interface is changed to the second state. And
The first changing unit further changes the state of the first interface from the second state to the first when the transmission of the first facsimile data to the second communication device is completed. Item 1. The first communication device according to Item 1, which is changed to a state.
(Item 3)
The first communication device further includes:
A second establishing unit that establishes a second wireless connection with the second communication device via the second interface before the predetermined instruction is acquired;
When the predetermined instruction is acquired while the second wireless connection is established, the notification transmission unit uses the second wireless connection to transmit the notification via the second interface. 3. The first communication device according to item 1 or 2, wherein the first notification is transmitted to the second communication device.
(Item 4)
The first communication device further includes:
A third establishing unit that establishes a third wireless connection with the second communication device via the first interface when the second wireless connection is disconnected;
Item 4. The item 3, wherein the notification transmitter does not transmit the first notification to the second communication device when the predetermined instruction is acquired while the third wireless connection is formed. First communication device.
(Item 5)
The first communication device further includes:
A notification receiving unit that receives a second notification from the second communication device via the second interface while the state of the first interface is the first state;
A second changing unit for changing the state of the first interface from the first state to a second state having higher power consumption than the first state when the second notification is received; ,
A fourth establishing unit that establishes a fourth wireless connection with the second communication device via the first interface after the state of the first interface is changed to the second state;
A facsimile receiving unit that receives second facsimile data from the second communication device via the first interface using the fourth wireless connection;
The second changing unit further changes the state of the first interface from the second state to the first when the reception of the second facsimile data from the second communication device is completed. Change to state,
The first communication device according to any one of items 1 to 4, wherein power consumption of the second interface is lower than power consumption of the first interface in the second state.
(Item 6)
The first communication device further includes:
A third interface connected to the public line;
An acquisition unit that acquires the predetermined instruction by receiving the first facsimile data from an external device via the third interface;
The first communication device according to any one of items 1 to 5, wherein the image represented by the first facsimile data is printed by the second communication device.
(Item 7)
The first communication device further includes:
An operation unit operated by a user;
A scan execution unit;
An acquisition unit for acquiring the predetermined instruction by receiving an operation for transmitting the first facsimile data in the operation unit;
A generation unit that, when the predetermined instruction is acquired, causes the scan execution unit to scan a document and generates the first facsimile data;
6. The first communication device according to any one of items 1 to 5, wherein the first facsimile data is transmitted from the second communication device to an external device via a public line.
(Item 8)
A second communication device,
A first interface for executing wireless communication according to the first communication method;
A second interface for executing wireless communication according to a second communication method different from the first communication method;
A notification receiving unit for receiving a first notification from the first communication device via the second interface while the state of the first interface is the first state;
A changing unit that changes the state of the first interface from the first state to a second state with higher power consumption than the first state when the first notification is received;
An establishing unit that establishes a first wireless connection with the first communication device via the first interface after the state of the first interface is changed to the second state;
A facsimile receiving unit that receives the first facsimile data from the first communication device via the first interface using the first wireless connection;
The changing unit further changes the state of the first interface from the second state to the first state when reception of the first facsimile data from the first communication device is completed. And
The second communication device, wherein power consumption of the second interface is lower than power consumption of the first interface in the second state.
(Item 9)
The first facsimile data is data generated by the first communication device when the first communication device scans a document.
The second communication device further includes:
A third interface connected to the public line;
The facsimile transmission section according to item 8, further comprising: a facsimile transmission section that transmits the first facsimile data to an external device via the third interface when the first facsimile data is received. Communication equipment.
(Item 10)
The first facsimile data is data that the first communication device receives from an external device via a public line,
The second communication device further includes:
A print execution unit;
The second communication device according to item 8, further comprising: a print control unit that causes the print execution unit to print an image represented by the first facsimile data when the first facsimile data is received.
(Item 11)
A first communication device,
A first interface for executing wireless communication according to the first communication method;
A second interface for executing wireless communication according to a second communication method different from the first communication method;
Notification transmission for transmitting a first notification to the second communication device via the second interface when a predetermined instruction for transmitting the first facsimile data to the second communication device is acquired. The first notification is for changing the state of the predetermined interface of the second communication device from an impossible state where wireless communication cannot be performed to a state where wireless communication can be performed. The predetermined interface is configured to receive the first facsimile data from the first communication device by the second communication device performing wireless communication according to the first communication method. The notification transmitter, which is an interface for
An establishing unit that establishes a first wireless connection with the second communication device via the first interface after the first notification is transmitted;
A facsimile transmission unit that transmits the first facsimile data to the second communication device via the first interface using the first wireless connection;
A first communication device comprising:
(Item 12)
A second communication device,
A first interface for executing wireless communication according to the first communication method;
A second interface for executing wireless communication according to a second communication method different from the first communication method;
A notification receiving unit for receiving a first notification from the first communication device via the second interface while the state of the first interface is an incapable state of performing wireless communication; ,
A changing unit that changes the state of the first interface from the impossible state to a state where wireless communication can be performed when the first notification is received;
An establishing unit that establishes a first wireless connection with the first communication device via the first interface after the state of the first interface is changed to a possible state;
A facsimile receiving unit that receives the first facsimile data from the first communication device via the first interface using the first wireless connection;
The changing unit further changes the state of the first interface from the possible state to the impossible state when reception of the first facsimile data from the first communication device is completed. 2 communication equipment.

  2: Communication system, 10: Multi-function device (MFP), 12: Operation unit, 14: Display unit, 20: Wi-Fi interface, 22: BT (Bluetooth) I / F, 24: Print execution unit, 26: Scan Execution unit, 30: control unit, 32: CPU, 34: memory, 50: call device (CD), 60: Wi-Fi interface, 62: BT (Bluetooth) I / F, 64: PSTNI / F, 70: control Part: 72: CPU, 74: memory, 80: handset, 82: microphone, 84: speaker, 120: FAX device

Claims (6)

A first communication device,
A first interface for executing wireless communication according to the first communication method;
A second interface for executing wireless communication according to a second communication method different from the first communication method;
Notification transmission for transmitting a first notification to the second communication device via the second interface when a predetermined instruction for transmitting the first facsimile data to the second communication device is acquired. The first notification changes the state of the predetermined interface of the second communication device from the first state to a second state with higher power consumption than the first state. And the predetermined interface is configured such that the second communication device performs wireless communication according to the first communication method, and the first facsimile data is received from the first communication device. The notification transmitter, which is an interface for receiving;
A first establishing unit that establishes a first wireless connection with the second communication device via the first interface after the first notification is transmitted;
A facsimile transmission unit that transmits the first facsimile data to the second communication device via the first interface using the first wireless connection;
A second establishing unit that establishes a second wireless connection with the second communication device via the second interface before the predetermined instruction is acquired;
A third establishing unit that establishes a third wireless connection with the second communication device via the first interface when the second wireless connection is disconnected;
Bei to give a,
The notification transmitter
When the predetermined instruction is acquired while the second wireless connection is established, the first notification is transmitted via the second interface using the second wireless connection. To the second communication device,
A first communication device that does not transmit the first notification to the second communication device when the predetermined instruction is acquired while the third wireless connection is formed . The first communication device further includes:
When the predetermined instruction is acquired while the state of the first interface is the first state, the power consumption of the state of the first interface is changed from the first state to the first state. A first changing unit for changing to a high second state;
The first establishing unit establishes the first wireless connection with the second communication device via the first interface after the state of the first interface is changed to the second state. And
The first changing unit further changes the state of the first interface from the second state to the first when the transmission of the first facsimile data to the second communication device is completed. The first communication device according to claim 1, wherein the first communication device is changed to a state. The first communication device further includes:
A notification receiving unit that receives a second notification from the second communication device via the second interface while the state of the first interface is the first state;
A second changing unit for changing the state of the first interface from the first state to a second state having higher power consumption than the first state when the second notification is received; ,
A fourth establishing unit that establishes a fourth wireless connection with the second communication device via the first interface after the state of the first interface is changed to the second state;
A facsimile receiving unit that receives second facsimile data from the second communication device via the first interface using the fourth wireless connection;
The second changing unit further changes the state of the first interface from the second state to the first when the reception of the second facsimile data from the second communication device is completed. Change to state,
The power consumption of the second interface, the second of the first in the state of lower than the power consumption of the interface, the first communication device according to claim 1 or claim 2. The first communication device further includes:
A third interface connected to the public line;
An acquisition unit that acquires the predetermined instruction by receiving the first facsimile data from an external device via the third interface;
The first image represented by facsimile data, said printed by the second communication device, the first communication device according to any one of claims 1 to 3. The first communication device further includes:
An operation unit operated by a user;
A scan execution unit;
An acquisition unit for acquiring the predetermined instruction by receiving an operation for transmitting the first facsimile data in the operation unit;
A generation unit that, when the predetermined instruction is acquired, causes the scan execution unit to scan a document and generates the first facsimile data;
The first communication device according to any one of claims 1 to 4 , wherein the first facsimile data is transmitted from the second communication device to an external device via a public line. A first communication device,
A first interface for executing wireless communication according to the first communication method;
A second interface for executing wireless communication according to a second communication method different from the first communication method;
Notification transmission for transmitting a first notification to the second communication device via the second interface when a predetermined instruction for transmitting the first facsimile data to the second communication device is acquired. The first notification is for changing the state of the predetermined interface of the second communication device from an impossible state where wireless communication cannot be performed to a state where wireless communication can be performed. The predetermined interface is configured to receive the first facsimile data from the first communication device by the second communication device performing wireless communication according to the first communication method. The notification transmitter, which is an interface for
A first establishing unit that establishes a first wireless connection with the second communication device via the first interface after the first notification is transmitted;
A facsimile transmission unit that transmits the first facsimile data to the second communication device via the first interface using the first wireless connection;
A second establishing unit that establishes a second wireless connection with the second communication device via the second interface before the predetermined instruction is acquired;
A third establishing unit that establishes a third wireless connection with the second communication device via the first interface when the second wireless connection is disconnected;
Bei to give a,
The notification transmitter
When the predetermined instruction is acquired while the second wireless connection is established, the first notification is transmitted via the second interface using the second wireless connection. To the second communication device,
A first communication device that does not transmit the first notification to the second communication device when the predetermined instruction is acquired while the third wireless connection is formed .

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