JP2015162859A - Radio communication apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technique capable of appropriately forming a radio network when the radio network including a radio communication apparatus and a terminal device should be formed.SOLUTION: If relation information related to a frequency band cht included in a G/O negotiation request received from a terminal device 50 is information related to a 5.0 GHz band, and an INTENT value Nt of the terminal device 50 is larger than an INTENT value Np of a printer 10, the printer 10 has the printer 10 operate as a G/O apparatus and the terminal device 50 as a CL apparatus, and thereby forms a WFDNW which includes the printer 10 and the terminal device 50 and in which a 2.4 GHz band different from the 5.0 GHz band should be used.

Description

  The present specification discloses a technique for forming a wireless network including a wireless communication device and a terminal device.

  Non-Patent Document 1 describes Wi-Fi Direct (hereinafter referred to as “WFD”) formulated by Wi-Fi Alliance. The WFD wireless network includes one device that operates as a Group Owner (hereinafter referred to as “G / O device”) and one or more devices that operate as clients managed by the G / O device (hereinafter referred to as “G / O device”). Called a “CL device”). When a connection according to WFD is to be established between a pair of devices, each of the pair of devices performs a G / O negotiation to determine whether to operate in G / O or CL.

"Wi-Fi Peer-to-Peer (P2P) Technical Specification Version 1.1" Wi-Fi Alliance, 2010

  The present specification discloses a technique capable of appropriately forming a wireless network when a wireless network including a wireless communication device and a terminal device is to be formed.

  The wireless communication device disclosed in the present specification includes a receiving unit, a first determining unit, a second determining unit, and a forming unit. The receiving unit receives a signal for forming a specific wireless network including the wireless communication device and the terminal device from the terminal device. The specific wireless network includes a first wireless network in which a terminal device operates as a master station and a wireless communication device operates as a slave station, and a first wireless network in which a wireless communication device operates as a master station and a terminal device operates as a slave station One of the two wireless networks. The signal includes relationship information related to a frequency band to be used in the first wireless network and a terminal-side index value set in advance in the terminal device. The first determination unit determines whether or not the relationship information is information related to the first frequency band. The second determination unit compares the terminal-side index value with the device-side index value set in advance in the wireless communication device to determine whether the terminal device is more likely to become a parent station than the wireless communication device. to decide. In the first case where the forming unit determines that the related information is information related to the first frequency band and determines that the terminal device is likely to be a parent station than the wireless communication device, A second radio network to be used in a second frequency band different from the frequency band is formed.

  In the above technique, the wireless communication device determines that the related information included in the signal received from the terminal device is information related to the first frequency band, and the terminal device is a parent station more than the wireless communication device. In the first case where it is determined that the second wireless network is to be used, the second wireless network in which the second frequency band is to be used can be formed. Therefore, the wireless communication device can appropriately form a wireless network when a wireless network including the wireless communication device and the terminal device is to be formed.

  A control method, a computer program, and a computer-readable recording medium storing the computer program for realizing the wireless communication device are also novel and useful. A communication system including the above-described wireless communication device is also new and useful.

1 shows a configuration of a communication system. The flowchart of the wireless connection process of 1st Example is shown. The flowchart of the 1st connection process of 1st Example is shown. The flowchart of the 2nd connection process of 1st Example is shown. The sequence diagram of the wireless connection process (case A1) of the first embodiment is shown. The sequence diagram of the wireless connection process (case A2) of the first embodiment is shown. The sequence diagram of the wireless connection process (case A3) of the first embodiment is shown. The sequence diagram of the wireless connection process (case B1) of the first embodiment is shown. The flowchart of the 2nd connection process of 2nd Example is shown. The sequence diagram of the wireless connection process (case B2) of the second embodiment is shown. 9 shows a flowchart of a second connection process of the third embodiment. The sequence diagram of the wireless connection process (case B3) of the third embodiment is shown.

(First embodiment)
As shown in FIG. 1, the communication system 2 includes a printer 10 and a terminal device 50. Each of the printer 10 and the terminal device 50 can execute Wi-Fi wireless communication (that is, Wi-Fi communication), which is a communication method established by the Wi-Fi Alliance.

(Configuration of Printer 10)
The printer 10 is a peripheral device (that is, a peripheral device such as a PC (abbreviation of personal computer)) capable of executing a printing function. The printer 10 includes an operation unit 12, a display unit 14, a print execution unit 16, a wireless LAN (abbreviation for Local Area Network) interface 18, and a control unit 20. Hereinafter, the interface is described as “I / F”.

  The operation unit 12 includes a plurality of keys. The user can input various instructions to the printer 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 wireless LAN I / F 18 is an interface for executing Wi-Fi wireless communication. The Wi-Fi system conforms to, for example, the IEEE standard of IEEE (abbreviation of The Institute of Electrical and Electronics Engineers, Inc.) or a standard conforming thereto (for example, 802.11a, 11b, 11g, 11n, etc.). It is a wireless communication system.

  More specifically, the wireless LAN I / F 18 supports a WFD (abbreviation of Wi-Fi Direct) method formulated by Wi-Fi Alliance. Therefore, the control unit 20 can execute Wi-Fi communication via the wireless LAN I / F 18 using a WFD wireless network (hereinafter referred to as “WFDNW”). Details of the WFD method are described in “Wi-Fi Peer-to-Peer (P2P) Technical Specification Version 1.1” created by Wi-Fi Alliance. Details of the WFD method are also disclosed in US Patent Application Publication No. 2013/0260683, which is cited with reference to this document.

  Wi-Fi wireless communication uses two types of frequency bands, 2.4 GHz and 5.0 GHz. Specifically, in Wi-Fi wireless communication, wireless communication is performed using radio waves (that is, carrier waves) in the frequency bands of 2.4 GHz and 5.0 GHz. The wireless LAN I / F 18 supports only the 2.4 GHz frequency band among the two types of frequency bands of 2.4 GHz and 5.0 GHz used in Wi-Fi wireless communication, and the frequency of 5.0 GHz. Obi is not supported. That is, the wireless LAN I / F 18 can execute wireless communication using only radio waves in the 2.4 GHz frequency band, and cannot execute wireless communication using radio waves in the 5.0 GHz frequency band. Hereinafter, in this specification, “the printer 10 supports only 2.4 GHz” means that the wireless LAN I / F 18 supports the 2.4 GHz frequency band and does not support the 5.0 GHz frequency band. It may be expressed as As shown in FIG. 1, the frequency band chp supported by the printer 10 is only 2.4 GHz. That is, the printer 10 can execute wireless communication using the 2.4 GHz band, but cannot execute wireless communication using the 5.0 GHz band.

  The control unit 20 includes a CPU 22 and a memory 24. The CPU 22 is a processor that executes various processes in accordance with programs stored in the memory 24. In FIG. 1, the memory 24 stores an INTENT value Np preset in the printer 10. The INTENT value will be described later.

(Configuration of terminal device 50)
The terminal device 50 is a portable terminal device such as a mobile phone (for example, a smartphone), a PDA, a notebook PC, a tablet PC, a digital camera, a portable music playback device, and a portable video playback device. In the modification, the terminal device 50 may be a stationary terminal device such as a desktop PC.

  The terminal device 50 includes a wireless LAN I / F (not shown) and a memory. The wireless LAN I / F of the terminal device 50 supports both the 2.4 GHz band and the 5.0 GHz band. Hereinafter, in the present specification, the wireless LAN I / F of the terminal device 50 supports both the 2.4 GHz band and the 5.0 GHz band, and the “terminal device 50 is 2.4 GHz and 5.0 GHz. It may be expressed as “corresponding to both”. That is, as shown in FIG. 1, the frequency band cht supported by the terminal device 50 is both the 2.4 GHz band and the 5.0 GHz band. That is, the terminal device 50 can execute both wireless communication using the 2.4 GHz band and wireless communication using the 5.0 GHz band. The memory of the terminal device 50 stores an INTENT value Nt preset in the printer 10.

(WFD method)
Next, the WFD method will be described. In the WFD standard, the three states of a WFD device are a Group Owner state (hereinafter referred to as “G / O state”), a client state (hereinafter referred to as “CL state”), and a device state. Is defined. The WFD device can selectively operate in one of the above three states.

  A WFD device in a G / O state (that is, a G / O device) is a device that forms a wireless network (that is, a WFDNW) in which the WFD device operates as a master station. A CL state WFD device (that is, a CL device) is a device that operates as a slave station of the WFDNW. A WFD device in a device state (that is, a device device) is a device that does not belong to the WFDNW.

  The WFDNW to which both the G / O device and the CL device belong is formed by one of the following two procedures, for example. In the first procedure, the pair of device devices execute wireless communication called G / O negotiation. Thereby, one of the pair of device devices is determined to be in the G / O state (that is, the G / O device), and the other is determined to be in the CL state (that is, the CL device). The G / O device forms a WFDNW. Further, the G / O device executes wireless communication 7 of connection data called WPS negotiation with the CL device. Thereafter, the G / O device establishes a connection with the CL device. Thereby, a WFDNW to which both the G / O device and the CL device belong is formed.

  In the second procedure, the device apparatus spontaneously shifts to the G / O state without executing the G / O negotiation, and forms the WFDNW. In this case, after the WFDNW is formed, the other device devices shift to the CL state without executing the G / O negotiation. Further, the G / O device performs wireless communication of connection data called WPS negotiation with the CL device. Thereafter, the G / O device establishes a connection with the CL device. Thereby, a WFDNW to which both the G / O device and the CL device belong is formed.

  The G / O negotiation executed in the first procedure will be further described. In the G / O negotiation, the following processing is executed between a pair of device devices. The first device that is one of the pair of device devices transmits a G / O negotiation Request to the second device that is the other device device. The G / O negotiation Request is a request signal for requesting the start of G / O negotiation. The G / O negotiation Request may be rephrased as a request signal for requesting transmission of the G / O negotiation Response. The G / O negotiation request is a first frequency band (5.0 GHz) stored in the memory of the first device as a frequency band to be used by the WFDNW when the first device operates as a G / O device. First relation information related to the band or 2.4 GHz band) and a first INTENT value preset in the first device.

  Further, when the second device receives the G / O negotiation request, the second device transmits a G / O negotiation Response, which is a response signal to the G / O negotiation request, to the first device. The G / O negotiation Response includes second relationship information related to the second frequency band (5.0 GHz or 2.4 GHz) to be used in the WFDNW when the second device operates as a G / O device. , And a second INTENT value preset in the second device.

  Here, the first relation information is information indicating one of a plurality of channels that support the first frequency band. Similarly, the second relation information is information indicating one of a plurality of channels that support the first frequency band. Therefore, the first device can determine whether the second frequency band is the 2.4 GHz band or the 5.0 GHz band by referring to the second relation information. The second device can make the same determination.

  The INTENT value is an index value indicating the degree to be G / O. The INTENT value is any value in the numerical range of 0 to 15. The larger the INTENT value, the easier it is to become a G / O device. In other words, the smaller the INTENT value, the easier it is to become a CL device. The first device compares the first INTENT value and the second INTENT value, and determines the G / O device and the CL device. Specifically, the first device determines that the first device is a G / O device when the first INTENT value is greater than the second INTENT value. The second device also determines the G / O device and the CL device by the same method. When the first INTENT value and the second INTENT value are the same value, one of the first device and the second device is randomly determined as a G / O device.

  When the first device receives the G / O negotiation Response and determines the G / O device and the CL device, the first device transmits Confirmation (Success) to the second device. Confirmation (Success) includes information indicating which of the first device and the second device is the G / O device. For example, when the first device is determined as the G / O device, the first device forms a WFDNW that uses the frequency band related to the first relationship information. On the other hand, when the second device is determined as the G / O device, the second device forms a WFDNW that uses the frequency band related to the second relationship information.

  If the first device cannot determine the G / O device and the CL device after receiving the G / O negotiation Response, it transmits Confirmation (Fail) to the second device. In this case, WFDNW is not formed.

  The G / O negotiation Request / Response, Confirmation (Success), and Confirmation (Fail) are transmitted and received using the 2.4 GHz band. Therefore, for example, even in a situation where the first device supports only the 2.4 GHz band and the second device supports both 2.4 GHz and 5.0 GHz, the pair of device devices is not limited to the above G / O negotiation Request / Response, Confirmation (Success), and Confirmation (Fail) can be transmitted and received.

  In the WPS negotiation, wireless communication of connection data is executed between the G / O device and the CL device. Wireless communication of connection data is performed using a frequency band (that is, 2.4 GHz or 5.0 GHz) used in the WFDNW. The connection data is data including information of a lower layer (for example, physical layer, data link layer, etc.) than the network layer of the OSI reference model (that is, data not including information of the network layer). The connection data includes, for example, a probe request / response signal, provision discovery request / response signal, authentication request / response signal, association request / response signal, WSC Exchange, 4-way handshake, and the like.

  The G / O device can execute wireless communication of the target data with the CL device without passing through other devices. The target data is data including information on the network layer of the OSI reference model and information on an upper layer (for example, application layer) than the network layer, and includes, for example, image data representing an image to be printed. In addition, the G / O device can relay wireless communication of target data between a pair of CL devices. As described above, in the WFDNW, each device can execute wireless communication of target data without using an access point (hereinafter referred to as “AP”) configured separately from each device. . That is, it can be said that the WFD method is a wireless communication method in which an AP is not used.

  In addition, the G / O device cannot execute wireless communication of the target data with a device device that does not belong to the WFDNW, but performs wireless communication of connection data with the device device to connect the device device. Can be established. As a result, the G / O device can cause the device device to participate in the WFDNW.

(Wireless connection processing; Fig. 2)
Next, the wireless connection process executed by the CPU 22 of the printer 10 will be described with reference to FIG. When the printer 10 is turned on, the printer 10 is not connected to any wireless network and is in a device state of the WFD standard.

  The CPU 22 repeatedly executes the monitoring process of S10 and the monitoring process of S12 until it determines YES in S10 or S12. In S <b> 10, the CPU 22 monitors reception of a G / O negotiation Request from the terminal device 50 via the wireless LAN I / F 18. When receiving the G / O negotiation request from the terminal device 50 in the device state, the CPU 22 determines YES in S10 and proceeds to S14. In S14, the CPU 22 executes a first connection process (see FIG. 3).

  In S <b> 12, the CPU 22 monitors whether a predetermined wireless connection operation is performed on the operation unit 12. When the user performs a predetermined wireless connection operation on the operation unit 12, the CPU 22 determines YES in S12, and proceeds to S16. In S16, the CPU 22 executes a second connection process (see FIG. 4).

(First connection process; FIG. 3)
Next, the first connection process will be described with reference to FIG. In S20, the CPU 22 determines whether or not the frequency band cht used when the terminal device 50 operates as a WFDNW G / O device is the 5.0 GHz band. The G / O negotiation request received from the terminal device 50 is a frequency band cht (that is, a 5.0 GHz band and a 2.4 GHz band to be used when the terminal device 50 operates as a WFDNW G / O device. Related information relating to one of them) and the INTENT value Nt set in the terminal device 50. Specifically, the relationship information indicates one of a plurality of channels that support the frequency band cht. That is, in S20, the CPU 22 determines whether or not the frequency band cht is the 5.0 GHz band by referring to the relationship information included in the G / O negotiation Request received from the terminal device 50. When it is determined that the frequency band cht is the 5.0 GHz band, the CPU 22 determines YES in S20, and proceeds to S22. On the other hand, if it is determined that the frequency band cht is the 2,4 GHz band, the CPU 22 determines NO in S20, skips S22 and S24, and proceeds to S26.

  In S <b> 22, the CPU 22 determines whether or not the INTENT value Nt set in the terminal device 50 is greater than or equal to the INTENT value Np stored in the memory 24 (that is, a preset INTENT value Np). . If the INTENT value Nt is greater than or equal to the INTENT value Np, the CPU 22 determines YES in S22 and proceeds to S24. On the other hand, if the INTENT value Nt is smaller than the INTENT value Np, the CPU 22 determines NO in S22, skips S24, and proceeds to S26.

  In S24, the CPU 22 changes the value of the INTENT value Np to a value larger than the INTENT value Nt. By changing the value of the INTENT value Np in S24, it is determined that the printer 10 is in the G / O state and the terminal device 50 is in the CL state in the G / O negotiation. As described above, the frequency band used by the WFDNW is determined as the frequency band used by the G / O device. A device with a larger INTENT value is a G / O device. As described above, the printer 10 supports only 2.4 GHz. Therefore, if the terminal device 50 operates as a G / O device, the printer 10 operates as a CL device, and a WFDNW using a 5.0 GHz frequency band is formed, the printer 10 uses the WFDNW. Communication cannot be performed. Therefore, in this embodiment, in order to prevent the occurrence of such a situation, the value of the INTENT value Np is changed in S24 so that the printer 10 operates as a G / O device.

  In subsequent S <b> 26, the CPU 22 transmits a G / O negotiation Response to the terminal device 50 via the wireless LAN I / F 18. The G / O negotiation Response is stored in the memory 24 and related information related to the frequency band chp (that is, 2.4 GHz band) to be used when the printer 10 operates as a WFDNW G / O device. And an INTENT value Np. Specifically, the relationship information indicates one of a plurality of channels that support the frequency band chp. If NO in S20 or S22, the INTENT value Np included in the G / O negotiation Response is the INTENT value Np stored in advance in the memory 24. On the other hand, in the case of YES in S20 and S22, the INTENT value Np included in the G / O negotiation Response is the INTENT value Np after being changed in S24.

  In S <b> 28, the CPU 22 receives Confirmation (Success) from the terminal device 50 via the wireless LAN I / F 18. Confirmation (Success) includes information indicating which of the printer 10 and the terminal device 50 is a G / O device. When the CPU 22 ends Confirmation (Success) in S28, the G / O negotiation is ended.

  When Confirmation (Success) includes information indicating that the printer 10 is a G / O device, the CPU 22 changes the state of the printer 10 to the G / O state after the G / O negotiation is completed (that is, after S28). To migrate. As a result, the printer 10 operates as a G / O device. Then, the CPU 22 forms a WFDNW that uses the frequency band chp (that is, 2.4 GHz band).

  On the other hand, when Confirmation (Success) includes information indicating that the terminal device 50 is a G / O device, the CPU 22 changes the status of the printer 10 to CL after the end of the G / O negotiation (that is, after S28). Transition to the state. As a result, the printer 10 operates as a CL device.

  In S30, the CPU 22 executes WPS negotiation with the terminal device 50 via the wireless LAN I / F 18. Specifically, the CPU 22 performs wireless communication of connection data with the terminal device 50 via the wireless LAN I / F 18.

  In subsequent S 32, the CPU 22 establishes a wireless connection with the terminal device 50 via the wireless LAN I / F 18. That is, when the printer 10 is a G / O device, the printer 10 causes the terminal device 50 to participate as a CL device in the WFDNW in which the printer 10 is a G / O device. When the terminal device 50 is a G / O device, the printer 10 participates as a CL device in the WFDNW in which the terminal device 50 is a G / O device. Thereby, a WFDNW to which both the printer 10 and the terminal device 50 belong is formed. When S32 ends, the first connection process of FIG. 3 ends. When the INTENT value Np is changed in S24, when S32 ends, the CPU 22 returns the value of the INTENT value Np to the value before the change. When the first connection process (see S14 in FIG. 2) ends, the wireless connection process in FIG. 2 ends.

(Second connection process; FIG. 4)
Next, the second connection process will be described with reference to FIG. When a predetermined wireless connection operation is executed by the operation unit 12, in S40, the CPU 22 sequentially executes each process of Scan, Listen, and Search. The scan process is a process for finding a G / O device and an AP existing around the MFP 10 by transmitting a probe request signal and receiving a probe response signal. The Listen process is a process for notifying the devices existing around the MFP 10 of the presence of the MFP 10 by receiving a Probe Request signal and transmitting a Probe Response signal. The Search process is a process for finding a device device existing around the MFP 10 by transmitting a Probe Request signal and receiving a Probe Response signal.

  Next, in S42, the CPU 22 causes the display unit 14 to display a device list indicating information on one or more devices found in S40. The user operates the operation unit 12 to select the terminal device 50 in the device state from the device list.

  In S <b> 44, the CPU 22 transmits a G / O negotiation Request to the terminal device 50 via the wireless LAN I / F 18. The G / O negotiation Request transmitted in S44 is related information (specifically, related to the frequency band chp (that is, 2.4 GHz band) to be used when the printer 10 operates as a WFDNW G / O device. Includes information indicating one of a plurality of channels supporting the frequency band chp) and an INTENT value Np stored in the memory 24.

  In S <b> 46, the CPU 22 receives a G / O negotiation Response from the terminal device 50 via the wireless LAN I / F 18. The G / O negotiation Response received in S46 is a frequency band cht to be used when the terminal device 50 operates as a WFDNW G / O device (that is, out of the 2.4 GHz band and the 5.0 GHz band). On the other hand, related information (specifically, information indicating one of a plurality of channels supporting the frequency band cht) and the INTENT value Nt set in the terminal device 50 are included.

  In S48, the CPU 22 determines whether or not the frequency band cht is the 5.0 GHz band. Specifically, in S48, the CPU 22 determines whether or not the frequency band cht is the 5.0 GHz band by referring to the relationship information included in the G / O negotiation Response received from the terminal device 50. . If it is determined that the frequency band cht is 5.0 GHz, the CPU 22 determines YES in S48, and proceeds to S50. On the other hand, when it is determined that the frequency band cht is the 2.4 GHz band, the CPU 22 determines NO in S48, and proceeds to S58.

  In S <b> 50, the CPU 22 determines whether or not the INTENT value Nt set in the terminal device 50 is greater than or equal to the INTENT value Np stored in the memory 24. If the INTENT value Nt is equal to or greater than the INTENT value Np, the CPU 22 determines YES in S50, and proceeds to S52. On the other hand, if the INTENT value Nt is smaller than the INTENT value Np, the CPU 22 determines NO in S50 and proceeds to S58.

  In S52, the CPU 22 transmits Confirmation (Fail) via the wireless LAN I / F 18. As a result, the terminal device 50 operates as a G / O device, and the formation of a WFDNW using the 5.0 GHz band (that is, a WFDNW in which the printer 10 cannot participate) is stopped.

  In S <b> 54, the CPU 22 stores the MAC address of the terminal device 50 and the INTENT value Nt in the memory 24. The MAC address of the terminal device 50 is included in the G / O negotiation Response received in S46.

  In S <b> 56, the CPU 22 changes the value of the INTENT value Np to a value larger than the value of the INTENT value Nt stored in the memory 24.

  When S56 ends, the process returns to S44. In the second S44, the CPU 22 transmits a G / O negotiation Request via the wireless LAN I / F 18 with the MAC address of the terminal device 50 stored in S54 as the transmission destination. The G / O negotiation Request transmitted in this case includes relationship information related to the frequency band chp and the INTENT value Np changed in S56.

  In the subsequent second S46, the CPU 22 receives a G / O negotiation Response from the terminal device 50. The received G / O negotiation Response is the same as the G / O negotiation Response received in the first S46.

  In subsequent S48, the CPU 22 determines YES and proceeds to S50. In the second S50, the CPU 22 determines whether or not the INTENT value Nt is equal to or greater than the changed INTENT value Np. Here, in S56, the value of the Intent value Np is changed to a value larger than the value of the INTENT value Nt. Therefore, in the second S50, the CPU 22 determines NO and proceeds to S58. In this case, it is determined that the printer 10 is in the G / O state, and it is determined that the terminal device 50 is in the CL state.

  In S <b> 58, the CPU 22 receives Confirmation (Success) from the terminal device 50 via the wireless LAN I / F 18. Confirmation (Success) includes information indicating which of the printer 10 and the terminal device 50 is a G / O device. When the CPU 22 ends Confirmation (Success) in S58, the G / O negotiation is ended.

  When Confirmation (Success) includes information indicating that the printer 10 is a G / O device, the CPU 22 changes the status of the printer 10 to the G / O status after the G / O negotiation is completed (that is, after S58). To migrate. As a result, the printer 10 operates as a G / O device. Then, the CPU 22 forms a WFDNW that uses the frequency band chp (that is, 2.4 GHz band).

  On the other hand, when Confirmation (Success) includes information indicating that the terminal device 50 is a G / O device, the CPU 22 changes the status of the printer 10 to CL after the end of the G / O negotiation (that is, after S58). Transition to the state. As a result, the printer 10 operates as a CL device. If NO is determined in S48 or S50, the printer 10 operates as a CL device.

  In S60, the CPU 22 executes WPS negotiation with the terminal device 50 via the wireless LAN I / F 18. Specifically, the CPU 22 performs wireless communication of connection data with the terminal device 50 via the wireless LAN I / F 18.

  In subsequent S <b> 62, the CPU 22 establishes a wireless connection with the terminal device 50 via the wireless LAN I / F 18. That is, when the printer 10 is a G / O device, the printer 10 causes the terminal device 50 to participate as a CL device in the WFDNW in which the printer 10 is a G / O device. When the terminal device 50 is a G / O device, the printer 10 participates as a CL device in the WFDNW in which the terminal device 50 is a G / O device. Thereby, a WFDNW to which both the printer 10 and the terminal device 50 belong is formed. When S62 ends, the second connection process of FIG. 4 ends. When the INTENT value Np is changed in S56, when S62 ends, the CPU 22 returns the value of the INTENT value Np to the value before the change. When the second connection process (see S16 in FIG. 2) ends, the wireless connection process in FIG. 2 ends.

(Specific case)
Next, specific cases A1, A2, A3, and B1 in which wireless connection is established between the printer 10 and the terminal device 50 will be described with reference to FIGS. Cases A1 to A3 and B1 are realized by the flowcharts of FIGS. In cases A1 to A3, the printer 10 receives the G / O negotiation Request from the terminal device 50 (see YES in S10 of FIG. 2), and executes the first connection process (see FIG. 3). In case B1, the printer 10 performs a wireless connection operation on the operation unit 12 of the terminal device 50 (in the case of YES in S12 of FIG. 2), and executes a second connection process (see FIG. 4).

(Case A1; FIG. 5)
In the initial state of case A1 in FIG. 5, the INTENT value Np “2” is set in the printer 10, and the INTENT value Nt “10” is set in the terminal device 50.

  The terminal device 50 transmits a G / O negotiation request to the printer 10. The G / O negotiation Request includes relationship information related to the frequency band cht “5.0 GHz band” and an INTENT value Nt “10”.

  When receiving the G / O negotiation request from the terminal device 50 (YES in S10 of FIG. 2), the printer 10 determines that the frequency band cht is the 5.0 GHz band (YES in S20 of FIG. 3). Further, the printer 10 determines that the INTENT value Nt “10” is larger than the INTENT value Np “2” (YES in S22 of FIG. 3). Therefore, the printer 10 changes the value of the INTENT value Np to “11”, which is a value larger than the INTENT value Nt (S24 in FIG. 3). Next, the printer 10 transmits a G / O negotiation Response to the terminal device 50 (S26 in FIG. 3). The G / O negotiation Response includes relationship information related to the frequency band chp “2.4 GHz band” and the changed INTENT value Np “11”.

  When the terminal device 50 receives the G / O negotiation Response from the printer 10, the terminal device 50 compares the INTENT value Nt “10” with the INTENT value Np “11”, and the printer 10 is a G / O device. Determine that the device. Next, the terminal device 50 transmits Confirmation (Success) to the printer 10. Confirmation (Success) includes information indicating that the printer 10 is a G / O device. When the terminal device 50 transmits Confirmation (Success), the terminal device 50 shifts to the CL state. That is, the terminal device 50 operates as a CL device.

  When the printer 10 receives Confirmation (Success) from the terminal device 50 (S28 in FIG. 3), the printer 10 shifts to the G / O state. That is, the printer 10 operates as a G / O device. The printer 10 forms a WFDNW that uses the frequency band chp (that is, 2.4 GHz band).

  Next, the printer 10 executes WPS negotiation with the terminal device 50 (S30 in FIG. 3). That is, the printer 10 performs wireless communication of connection data with the terminal device 50.

  Next, the printer 10 establishes a wireless connection with the terminal device 50 (S32 in FIG. 3). That is, the printer 10 causes the terminal device 50 to participate as a CL device in the WFDNW in which the printer 10 is a G / O device. Thereby, a WFDNW to which both the printer 10 and the terminal device 50 belong is formed.

  As described above, in case A1, the printer 10 receives the G / O negotiation Request including the INTENT value Nt from the terminal device 50. Upon receiving the G / O negotiation request, the printer 10 can determine whether the frequency band cht is the 5.0 GHz band and the INTENT value Nt is greater than or equal to the INTENT value Np (S20 in FIG. 3). , S22). Therefore, the printer 10 can change the value of the INTENT value Np after receiving the G / O negotiation Request from the terminal device 50 and before transmitting the G / O negotiation Response to the terminal device 50. While transmitting / receiving the G / O negotiation Request / Response, the printer 10 can be appropriately determined as a G / O device.

(Case A2; FIG. 6)
Even in the initial state of case A2 in FIG. 6, the INTENT value Np “2” is set in the printer 10, and the INTENT value Nt “10” is set in the terminal device 50.

  The terminal device 50 transmits a G / O negotiation request to the printer 10. In case A2, the G / O negotiation Request includes relationship information related to the frequency band cht “2.4 GHz band” and the INTENT value Nt “10”.

  When receiving the G / O negotiation request from the terminal device 50 (YES in S10 of FIG. 2), the printer 10 determines that the frequency band cht is the 2.4 GHz band (NO in S20 of FIG. 3). For this reason, the printer 10 does not change the preset INT value Np. Next, the printer 10 transmits a G / O negotiation Response to the terminal device 50 (S26 in FIG. 3). The G / O negotiation Response includes relationship information related to the frequency band chp “2.4 GHz band” and a preset INTENT value Np “2”.

  The terminal device 50 receives a G / O negotiation Response from the printer 10. The terminal device 50 compares the INTENT value Nt “10” with the INTENT value Np “2”, and determines that the terminal device 50 is a G / O device and the printer 10 is a CL device. Next, the terminal device 50 transmits Confirmation (Success) to the printer 10. Confirmation (Success) includes information indicating that the terminal device 50 is a G / O device. When the terminal device 50 transmits Confirmation (Success), the terminal device 50 shifts to the G / O state. That is, the terminal device 50 operates as a G / O device. And the terminal device 50 forms WFDNW using the frequency band cht (namely, 2.4 GHz band).

  When the printer 10 receives Confirmation (Success) from the terminal device 50 (S28 in FIG. 3), the printer 10 shifts to the CL state. That is, the printer 10 operates as a CL device.

  Next, the printer 10 performs WPS negotiation with the terminal device 50. That is, the printer 10 performs wireless communication of connection data with the terminal device 50.

  Next, the printer 10 establishes a wireless connection with the terminal device 50 (S32 in FIG. 3). That is, the printer 10 participates as a CL device in the WFDNW in which the terminal device 50 is a G / O device. Thereby, a WFDNW to which both the printer 10 and the terminal device 50 belong is formed.

  As described above, in case A2, when the frequency band cht is 2.4 GHz, the printer 10 and the terminal 10 according to the preset INT value Np are not changed without changing the INT value Np of the printer 10. It is possible to appropriately form a WFDNW to which both of the devices 50 belong and which uses the 2.4 GHz band.

(Case A3; FIG. 7)
In the initial state of case A3 in FIG. 7, the INTENT value Np “2” is set in the printer 10, and the INTENT value Nt “1” is set in the terminal device 50.

  The terminal device 50 transmits a G / O negotiation request to the printer 10. In case A3, the G / O negotiation Request includes relationship information related to the frequency band cht “5.0 GHz band” and the INTENT value Nt “1”.

  When receiving the G / O negotiation request from the terminal device 50 (YES in S10 of FIG. 2), the printer 10 determines that the frequency band cht is the 5.0 GHz band (YES in S20 of FIG. 3). Further, the printer 10 determines that the INTENT value Nt “1” is smaller than the INTENT value Np “2” (NO in S22 of FIG. 3). For this reason, the printer 10 does not change the preset INT value Np. Next, the printer 10 transmits a G / O negotiation Response to the terminal device 50 (S26 in FIG. 3). The G / O negotiation Response includes relationship information related to the frequency band chp “2.4 GHz band” and the INTENT value Np “2”.

  The terminal device 50 receives a G / O negotiation Response from the printer 10. The terminal device 50 compares the INTENT value Nt “1” with the INTENT value Np “2” and determines that the printer 10 is a G / O device and the terminal device 50 is a CL device. Next, the terminal device 50 transmits Confirmation (Success) to the printer 10. Confirmation (Success) includes information indicating that the printer 10 is a G / O device. When the terminal device 50 transmits Confirmation (Success), the terminal device 50 shifts to the CL state. That is, the terminal device 50 operates as a CL device.

  When the printer 10 receives Confirmation (Success) from the terminal device 50 (S28 in FIG. 3), the printer 10 shifts to the G / O state. That is, the printer 10 operates as a G / O device. The printer 10 forms a WFDNW that uses the frequency band chp (that is, 2.4 GHz band). Next, the printer 10 performs WPS negotiation with the terminal device 50 (S30 in FIG. 3), and establishes a wireless connection with the terminal device 50 (S32 in FIG. 3). That is, the printer 10 causes the terminal device 50 to participate as a CL device in the WFDNW in which the printer 10 is a G / O device. Thereby, a WFDNW to which both the printer 10 and the terminal device 50 belong is formed.

  As described above, in case A3, the printer 10 determines that if the preset INT value Np is greater than the INTENT value Nt (NO in S22 of FIG. 3), that is, the printer 10 does not change the INTENT value Np. When the G / O state is determined, according to the INTENT value Np preset in the printer 10 (or a Probe Request including the INTENT value Np preset in the printer 10 is transmitted to the terminal device 50). The WFDNW in which the printer 10 is a G / O device, and the WFDNW using the frequency band chp (that is, 2.4 GHz band) can be appropriately formed.

(Case B1; FIG. 8)
In the initial state of case B1 in FIG. 8, the INTENT value Np “2” is set in the printer 10, and the INTENT value Nt “10” is set in the terminal device 50.

  In case B1, a predetermined wireless connection operation is executed by the operation unit 12 of the printer 10 (YES in S12 of FIG. 2). When the wireless connection operation is executed, the printer 10 sequentially executes each process of Scan, Listen, and Search (S40 in FIG. 4). Then, the printer 10 causes the display unit 14 to display a device list indicating devices found by Scan, Listen, and Search (S42 in FIG. 4). The user operates the operation unit 12 to select the terminal device 50 in the device state from the device list (S42 in FIG. 4).

  When the terminal device 50 is selected from the device list, the printer 10 transmits a G / O negotiation Request to the terminal device 50 (S44 in FIG. 4). The G / O negotiation Request includes relationship information related to the frequency band chp “2.4 GHz band” and the INTENT value Np “2”.

  When the terminal device 50 receives the G / O negotiation request from the printer 10, the terminal device 50 transmits a G / O negotiation Response to the printer 10. The G / O negotiation Response includes relationship information related to the frequency band cht “5.0 GHz band” and an INTENT value Nt “10”.

  When receiving the G / O negotiation Response from the terminal device 50 (S46 in FIG. 4), the printer 10 determines that the frequency band cht is the 5.0 GHz band (YES in S48 in FIG. 4). Further, the printer 10 determines that the INTENT value Nt “10” is larger than the INTENT value Np “2” (YES in S50 of FIG. 4). Therefore, the printer 10 transmits Confirmation (Fail) to the terminal device 50 (S52 in FIG. 4). As a result, the terminal device 50 operates as a G / O device, and the formation of a WFDNW using the 5.0 GHz band (that is, a WFDNW in which the printer 10 cannot participate) is stopped.

  Next, the printer 10 stores the MAC address of the terminal device 50 and the INTENT value Nt in the memory 24 (S54 in FIG. 4). The MAC address and the INTENT value Nt of the terminal device 50 are included in the G / O negotiation Response. Then, the printer 10 changes the value of the INTENT value Np to “11”, which is a value larger than the INTENT value Nt (S56 in FIG. 4). Then, the printer 10 transmits the G / O negotiation Request again using the MAC address of the terminal device 50 stored in the memory 24 as a transmission destination (S44 in FIG. 4). The G / O negotiation Request includes relationship information related to the frequency band chp “2.4 GHz band” and the changed INTENT value Np “11”.

  When the terminal device 50 receives the G / O negotiation request from the printer 10, the terminal device 50 transmits a G / O negotiation Response to the printer 10. The G / O negotiation Response includes relationship information related to the frequency band cht “5.0 GHz band” and an INTENT value Nt “10”.

  When receiving the G / O negotiation Response from the terminal device 50 (S46 in FIG. 4), the printer 10 determines that the frequency band cht is the 5.0 GHz band (YES in S48 in FIG. 4). Further, the printer 10 determines that the changed INTE value Np “11” is larger than the INTENT value Nt “10” (NO in S50 of FIG. 4). Therefore, the printer 10 determines that the printer 10 is a G / O device and the terminal device 50 is a CL device.

  Next, the printer 10 transmits Confirmation (Success) to the terminal device 50. Confirmation (Success) includes information indicating that the printer 10 is a G / O device. When transmitting confirmation (Success) to the terminal device 50, the printer 10 shifts to the G / O state and operates as a G / O device. The printer 10 forms a WFDNW that uses the frequency band chp (that is, 2.4 GHz band).

  Upon receiving Confirmation (Success), the terminal device 50 shifts to the CL state and operates as a CL device.

  The printer 10 executes WPS negotiation with the terminal device 50 (S60 in FIG. 4). That is, the printer 10 performs wireless communication of connection data with the terminal device 50.

  Next, the printer 10 establishes a wireless connection with the terminal device 50 (S62 in FIG. 4). That is, the printer 10 causes the terminal device 50 to participate as a CL device in the WFDNW in which the printer 10 is a G / O device. Thereby, a WFDNW to which both the printer 10 and the terminal device 50 belong is formed.

  As described above, in case B1, the printer 10 is a WFDNW including the printer 10 and the terminal device 50 after transmitting Confirmation (Fail) to the terminal device 50, and is 2.4 GHz different from the 5.0 GHz band. The WFDNW in which the band is to be used can be appropriately formed.

(Effects of the first embodiment)
As described above, in this embodiment, the printer 10 determines that the frequency band cht is 5.0 GHz (YES in S20 in FIG. 3, YES in S48 in FIG. 4), and the INTENT value Nt is the INTENT value. When it is determined that it is Np or more (YES in S22 of FIG. 3 and YES in S50 of FIG. 4), the printer 10 is operated as a G / O device, the terminal device 50 is operated as a CL device, and the printer 10 The WFDNW in which the terminal device 50 is included and the 2.4 GHz band that is different from the 5.0 GHz band is to be used is formed (S32 in FIG. 3 and S62 in FIG. 4). Accordingly, the printer 10 can appropriately form the WFDNW when the WFDNW including the printer 10 and the terminal device 50 is to be formed.

  In this embodiment, the printer 10 supports only the 2.4 GHz band and does not support the 5.0 GHz band. According to the technique of this embodiment, even if it is determined that the frequency band cht is 5.0 GHz and the INTENT value Nt is determined to be greater than or equal to the INTENT value Np, the printer 10 is not compatible. Formation of a WFDNW using the 5.0 GHz band can be prevented. Accordingly, the printer 10 can appropriately form the WFDNW when the WFDNW including the printer 10 and the terminal device 50 is to be formed.

(Correspondence)
The printer 10 is an example of a “wireless communication device”. The wireless LAN I / F 18 is an example of a “wireless communication interface”. The 5.0 GHz band and the 2.4 GHz band are examples of the “first frequency band” and the “second frequency band”, respectively. WFDNW is an example of a “specific wireless network”. The G / O device and the CL device are examples of “master station” and “slave station”, respectively. The WFDNW in which the terminal device 50 operates as a G / O device and the printer 10 operates as a CL device is an example of “first wireless network”. A WFDNW in which the printer 10 operates as a G / O device and the terminal device 50 operates as a CL device is an example of a “second wireless network”. The G / O negotiation request received in the case of YES in S10 of FIG. 2 and the G / O negotiation Response received in S46 of FIG. 4 are examples of “signals for forming a specific wireless network”. is there. The frequency band cht is an example of “frequency band to be used in the first wireless network”. The INTENT value Nt and the INTENT value Np are examples of “terminal side index value” and “device side index value”, respectively. The changed INT value Np is an example of “specific index value”. The case of YES in S20 and S22 of FIG. 3 and the case of YES in S48 and S50 of FIG. 4 are examples of the “first case”. The G / O negotiation Request received when S10 in FIG. 2 is YES is an example of a “request signal”. The G / O negotiation Response transmitted in S26 of FIG. 3 is an example of a “response signal”. The case of NO in S22 of FIG. 3 and the case of NO in S50 of FIG. 4 are examples of the “second case”. The case of NO in S20 of FIG. 3 and the case of NO in S48 of FIG. 4 are examples of the “third case”.

  The processing in the case of YES in S10 in FIG. 2 and the processing in S46 in FIG. 4 are examples of processing executed by the “reception unit”. The determination in S20 of FIG. 3 and the determination of S48 in FIG. 4 are examples of processing executed by the “first determination unit”. The determination in S22 in FIG. 3 and the determination in S50 in FIG. 4 are examples of processing executed by the “second determination unit”. The processing of S32 in the case of YES in S20 and S22 of FIG. 3 and the processing of S62 in the case of YES in S48 and S50 of FIG. The process of S26 in the case of YES in S20 and S22 of FIG. 3 is an example of a process executed by the “first transmission unit”. The process of S26 in the case of NO in S22 of FIG. 3 is an example of a process executed by the “second transmission unit”. The process of S26 in the case of NO in S20 of FIG. 3 is an example of a process executed by the “third transmitting unit”.

(Second embodiment)
Differences from the first embodiment will be described. In the present embodiment, the content of the second connection process executed by the CPU 22 of the printer 10 is different from that of the first embodiment. That is, in the present embodiment, the CPU 22 spontaneously shifts to the G / O state after transmitting Confirmation (Fail) to the terminal device 50 and establishes a wireless connection with the terminal device 50 in the first embodiment. Is different.

(Second connection process; FIG. 9)
With reference to FIG. 9, the second connection processing of the present embodiment will be described. When a predetermined wireless connection operation is executed by the operation unit 12, the CPU 22 sequentially executes the processes of S70, S72, S74, and S76. The contents of each process of S70 to S76 are the same as the contents of each process of S40 to S46 of FIG.

  Next, the CPU 22 executes each determination of S78 and S80. The contents of each determination in S78 and S80 are the same as the contents of each determination in S48 and S50 of FIG. If YES in S78, the process proceeds to S80. If YES in S80, the process proceeds to S82. On the other hand, if NO in S78 or S80, the process proceeds to S92. The contents of each process of S92, S94, and S96 are also the same as the contents of each process of S58, S60, and S62 of FIG.

  In S <b> 82, the CPU 22 transmits Confirmation (Fail) via the wireless LAN I / F 18. As a result, the terminal device 50 operates as a G / O device, and the formation of a WFDNW using the 5.0 GHz band (that is, a WFDNW in which the printer 10 cannot participate) is stopped.

  In S <b> 84, the CPU 22 stores the MAC address of the terminal device 50 in the memory 24. The MAC address of the terminal device 50 is included in the G / O negotiation Response received in S76.

  In S86, the CPU 22 voluntarily shifts the state of the printer 10 to the G / O state. As a result, the printer 10 operates as a G / O device. Then, the CPU 22 forms a WFDNW that uses the frequency band chp (that is, 2.4 GHz band).

  In S88, the CPU 22 transmits an Invitation Request via the wireless LAN I / F 18 with the MAC address of the terminal device 50 stored in S84 as the transmission destination. Invitation Request is a request signal for causing the terminal device 50 to participate as a CL device in the WFDNW formed by the printer 10 that is a G / O device.

  In S90, the CPU 22 receives an Invitation Response (OK) from the terminal device 50 via the wireless LAN I / F 18. Invitation Response (OK) is a response signal indicating that the terminal device 50 participates as a CL device in the WFDNW formed by the printer 10 that is a G / O device. When S90 ends, the process proceeds to S94.

  In S94, the CPU 22 executes WPS negotiation with the terminal device 50 via the wireless LAN I / F 18. Specifically, the CPU 22 performs wireless communication of connection data with the terminal device 50 via the wireless LAN I / F 18.

  In subsequent S <b> 96, the CPU 22 establishes a wireless connection with the terminal device 50 via the wireless LAN I / F 18. That is, the printer 10 causes the terminal device 50 to participate as a CL device in the WFDNW in which the printer 10 is a G / O device. Thereby, a WFDNW to which both the printer 10 and the terminal device 50 belong is formed. When S96 ends, the second connection process of FIG. 9 ends.

(Specific case; Case B2; FIG. 10)
Next, a specific case of the present embodiment will be described with reference to FIG. In the initial state of case B2 in FIG. 10, the INTENT value Np “2” is set in the printer 10, and the INTENT value Nt “10” is set in the terminal device 50.

  Also in case B2, a predetermined wireless connection operation is executed on the operation unit 12 of the printer 10 (YES in S12 of FIG. 2). When the wireless connection operation is executed, the printer 10 sequentially executes each process of Scan, Listen, and Search (S70 in FIG. 9). Then, the printer 10 causes the display unit 14 to display a device list indicating devices found by Scan, Listen, and Search (S72 in FIG. 9). The user operates the operation unit 12 to select the terminal device 50 in the device state from the device list (S72 in FIG. 9).

  When the terminal device 50 is selected from the device list, the printer 10 transmits a G / O negotiation Request to the terminal device 50 (S74 in FIG. 9). The G / O negotiation Request includes relationship information related to the frequency band chp “2.4 GHz band” and the INTENT value Np “2”.

  When the terminal device 50 receives the G / O negotiation request from the printer 10, the terminal device 50 transmits a G / O negotiation Response to the printer 10. The G / O negotiation Response includes relationship information related to the frequency band cht “5.0 GHz band” and an INTENT value Nt “10”.

  Upon receiving the G / O negotiation Response from the terminal device 50 (S76 in FIG. 9), the printer 10 determines that the frequency band cht is the 5.0 GHz band (YES in S78 in FIG. 9). Further, the printer 10 determines that the INTENT value Nt “10” is larger than the INTENT value Np “2” (YES in S80 of FIG. 9). Therefore, the printer 10 transmits Confirmation (Fail) to the terminal device 50 (S82 in FIG. 9). As a result, the terminal device 50 operates as a G / O device, and the formation of a WFDNW using the 5.0 GHz band (that is, a WFDNW in which the printer 10 cannot participate) is stopped.

  Next, the printer 10 stores the MAC address of the terminal device 50 in the memory 24 (S84 in FIG. 9). Then, the printer 10 spontaneously shifts to the G / O state. As a result, the printer 10 operates as a G / O device. The printer 10 forms a WFDNW that uses the frequency band chp (that is, 2.4 GHz band).

  Next, the printer 10 transmits an Invitation Request using the MAC address of the terminal device 50 stored in the memory 24 as a transmission destination (S88 in FIG. 9).

  When receiving the Invitation Request from the printer 10, the terminal device 50 transmits an Invitation Response (OK) to the printer 10. When the terminal device 50 transmits an Invitation Response (OK) to the printer 10, the terminal device 50 shifts to the CL state. Thereby, the terminal device 50 operates as a CL device.

  When the printer 10 receives an Invitation Response (OK) from the terminal device 50 (S90 in FIG. 9), the printer 10 executes WPS negotiation with the terminal device 50 (S94 in FIG. 9). That is, the printer 10 performs wireless communication of connection data with the terminal device 50.

  Next, the printer 10 establishes a wireless connection with the terminal device 50 (S96 in FIG. 9). That is, the printer 10 causes the terminal device 50 to participate as a CL device in the WFDNW in which the printer 10 is a G / O device. Thereby, a WFDNW to which both the printer 10 and the terminal device 50 belong is formed.

(Effect of the second embodiment)
As described above, in the present embodiment, after the confirmation (Fail) is transmitted (S82 in FIG. 4), the printer 10 spontaneously operates the printer 10 as a G / O device (S86 in FIG. 4). 2. Form a WFDNW that uses the 2.4 GHz band. Thereafter, the printer 10 can form an WFDNW including the printer 10 and the terminal device 50 by transmitting an Invitation Request to the terminal device 50 and causing the terminal device 50 to participate in the WFDNW. Therefore, also in this embodiment, the printer 10 can appropriately form the WFDNW in the wireless communication device.

(Correspondence)
The case of YES in S78 and S80 of FIG. 9 is an example of “first case”. The case of NO in S80 of FIG. 9 is an example of “second case”. The case of NO in S78 of FIG. 9 is an example of the “third case”.

(Third embodiment)
The description will focus on the differences from the first embodiment. Also in this embodiment, the contents of the second connection process executed by the CPU 22 of the printer 10 are different from those in the first embodiment. That is, the present embodiment is different from the first embodiment in that the CPU 22 receives a G / O negotiation Request from an external device after transmitting Confirmation (Fail) to the terminal device 50.

(Second connection process; FIGS. 4 and 11)
With reference to FIG. 4 and FIG. 11, the second connection process of the present embodiment will be described. As shown in FIG. 4, also in this embodiment, when a predetermined wireless connection operation is executed by the operation unit 12, the CPU 22 executes each process of S40 to S54 in FIG. 4 as in the first embodiment. . Further, when NO in S48 or S50, the CPU 22 executes each process of S58 to S62 as in the first embodiment.

  In this embodiment, when the CPU 22 stores the MAC address of the terminal device 50 and the INTENT value Nt set in the terminal device 50 in the memory 24 in S54, the process proceeds to S100 in FIG. Is different.

  In S100 of FIG. 11, the CPU 22 monitors reception of a G / O negotiation request. When the CPU 22 receives the G / O negotiation Request from the external device in the device state via the wireless LAN I / F 18, the CPU 22 determines YES in S100, and proceeds to S102.

  In S102, the CPU 22 transmits the received MAC address of the G / O negotiation request (ie, the MAC address included in the G / O negotiation request) and the terminal device 50 stored in the memory 24 in S54 of FIG. It is determined whether or not the MAC address matches. When the MAC address of the transmission source of the G / O negotiation request matches the MAC address of the terminal device 50 stored in the memory 24, the CPU 22 determines YES in S102, and proceeds to S104. In this case, the transmission source of the G / O negotiation request is the terminal device 50. On the other hand, if the MAC address of the transmission source of the G / O negotiation request is different from the MAC address of the terminal device 50 stored in the memory 24, the CPU 22 determines NO in S102 and proceeds to S114.

  In S <b> 104, the CPU 22 changes the value of the INTENT value Np to a value larger than the value of the INTENT value Np stored in the memory 24. When the value of the INTENT value Np is changed in S104, the printer 10 is determined to be in the G / O state, and the terminal device 50 is determined to be in the CL state.

  In S <b> 106, the CPU 22 transmits a G / O negotiation Response to the terminal device 50 via the wireless LAN I / F 18. The G / O negotiation Response includes relation information related to the frequency band chp (that is, 2.4 GHz) and the changed INT value Np. When S106 ends, the process proceeds to S108.

  Since each process of S114, S116, S118, and S120 is the same as each process of S20, S22, S24, and S26 of FIG. 3, detailed description is abbreviate | omitted. When S120 ends, the process proceeds to S108.

  Since each process of S108, S110, and S112 is the same as each process of S58, S60, and S62 of FIG. 4, detailed description is abbreviate | omitted. When S112 ends, a WFDNW to which both the printer 10 and the terminal device 50 belong is formed. When S112 ends, the second connection process of FIGS. 4 and 11 ends. When the INTENT value Np has been changed in S104 or S118, when S112 ends, the CPU 22 returns the value of the INTENT value Np to the value before the change.

(Specific case; Case B3; FIG. 12)
Next, a specific case of the present embodiment will be described with reference to FIG. In the initial state of case B3 in FIG. 12, the INTENT value Np “2” is set in the printer 10, and the INTENT value Nt “10” is set in the terminal device 50.

  Also in case B3, a predetermined wireless connection operation is executed in the operation unit 12 of the printer 10 (YES in S12 of FIG. 2). When the wireless connection operation is executed, the printer 10 sequentially executes each process of Scan, Listen, and Search (S40 in FIG. 4). Then, the printer 10 causes the display unit 14 to display a device list indicating devices found by Scan, Listen, and Search (S42 in FIG. 4). The user operates the operation unit 12 to select the terminal device 50 in the device state from the device list (S42 in FIG. 4).

  When the terminal device 50 is selected from the device list, the printer 10 transmits a G / O negotiation Request to the terminal device 50 (S44 in FIG. 4). The G / O negotiation Request includes relationship information related to the frequency band chp “2.4 GHz band” and the INTENT value Np “2”.

  When the terminal device 50 receives the G / O negotiation request from the printer 10, the terminal device 50 transmits a G / O negotiation Response to the printer 10. The G / O negotiation Response includes relationship information related to the frequency band cht “5.0 GHz band” and an INTENT value Nt “10”.

  When receiving the G / O negotiation Response from the terminal device 50 (S46 in FIG. 4), the printer 10 determines that the frequency band cht is the 5.0 GHz band (YES in S48 in FIG. 4). Further, the printer 10 determines that the INTENT value Nt “10” is larger than the INTENT value Np “2” (YES in S50 of FIG. 4). Therefore, the printer 10 transmits Confirmation (Fail) to the terminal device 50 (S52 in FIG. 4). As a result, the terminal device 50 operates as a G / O device, and the formation of a WFDNW using the 5.0 GHz band (that is, a WFDNW in which the printer 10 cannot participate) is stopped.

  Next, the printer 10 stores the MAC address of the terminal device 50 and the INTENT value Nt in the memory 24 (S54 in FIG. 4). Then, the printer 10 monitors whether a G / O negotiation request is received from another device (S100 in FIG. 11).

  When the terminal device 50 receives Confirmation (Fail) from the printer 10, the terminal device 50 transmits a G / O negotiation Request to the printer 10. For example, when the terminal device 50 has a so-called retry function, the terminal device 50 automatically transmits a G / O negotiation request to the printer 10 when receiving the Confirmation (Fail) from the printer 10. The G / O negotiation Request includes relationship information related to the frequency band cht “5.0 GHz” and the INTENT value Nt “10”.

  When the printer 10 receives the G / O negotiation request from the terminal device 50 (YES in S100 of FIG. 11), the transmission source MAC address of the G / O negotiation request and the MAC address of the terminal device 50 stored in the memory 24 are displayed. Are determined to match (YES in S102 of FIG. 11). Then, the printer 10 changes the value of the INTENT value Np to “11”, which is a value larger than the INTENT value Nt (S104 in FIG. 11). Then, the printer 10 transmits a G / O negotiation Response to the terminal device 50 (S106 in FIG. 11). The G / O negotiation Response includes relationship information related to the frequency band chp “2.4 GHz band” and the changed INTENT value Np “11”.

  The terminal device 50 compares the tp receiving the G / O negotiation Response from the printer 10, the INTENT value Nt “10” and the INTENT value Np “11”, and the printer 10 is a G / O device. It is determined that the device is a CL device. Next, the terminal device 50 transmits Confirmation (Success) to the printer 10. Confirmation (Success) includes information indicating that the printer 10 is a G / O device. When the terminal device 50 transmits Confirmation (Success), the terminal device 50 shifts to the CL state. That is, the terminal device 50 operates as a CL device.

  When receiving confirmation (Success) from the terminal device 50 (S108 in FIG. 11), the printer 10 shifts to the G / O state and operates as a G / O device. The printer 10 forms a WFDNW that uses the frequency band chp (that is, 2.4 GHz band).

  Next, the printer 10 executes WPS negotiation with the terminal device 50 (S110 in FIG. 11). Then, the printer 10 establishes a wireless connection with the terminal device 50 (S112 in FIG. 11). That is, the printer 10 causes the terminal device 50 to participate as a CL device in the WFDNW in which the printer 10 is a G / O device. Thereby, a WFDNW to which both the printer 10 and the terminal device 50 belong is formed.

(Effect of the third embodiment)
As described above, in this embodiment, after transmitting the confirmation (Fail), the printer 10 receives a G / O negotiation request from another device (YES in S100 in FIG. 11) and is stored in the memory 24. When the MAC address of the terminal device 50 matches the MAC address of the transmission source of the G / O negotiation request (YES in S102 in FIG. 11), the changed INT value Np is sent to the terminal device 50 as the G / O negotiation response. It can be transmitted (S106 in FIG. 11). Thereafter, the printer 10 is a WFDNW including the printer 10 and the terminal device 50 by operating the printer 10 as a G / O device and the terminal device 50 as a CL device, which is different from the 5.0 GHz band 2. A WFDNW to be used in the 4 GHz band is formed (S112 in FIG. 11). Therefore, also in this embodiment, the printer 10 can appropriately form the WFDNW.

  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.

(Variation 1) In each case described above, when the CPU 22 of the printer 10 changes the value of the INTENT value Np to a value larger than the value of the INTENT value Nt, a value that is 1 larger than the value of the INTENT value Nt (“11”). (See FIGS. 5, 8, and 12). The CPU 22 of the printer 10 may change the INTENT value Np to “15”, which is the maximum value, when changing the value of the INTENT value Np to a value larger than the value of the INTENT value Nt.

(Modification 2) In each of the above-described embodiments, the INTENT value is used as an index value indicating the degree to be G / O. However, the index value indicating the degree to be G / O is not limited to the INTENT value, but may be any other index value.

(Modification 3) In each of the above embodiments, the CPU 22 of the printer 10 determines whether the frequency band cht is the 5.0 GHz band (S20 in FIG. 3, S48 in FIG. 4, S78 in FIG. 9). , The determination is made prior to determining whether the ENT value Nt is greater than or equal to the INTENT value Np (S22 in FIG. 3, S50 in FIG. 4, S80 in FIG. 9). Good.

(Modification 4) The printer 10 may further include not only a printing function but also a scanning function, a FAX function, a telephone function, and the like.

(Modification 5) In each of the embodiments described above, the CPU 22 of the printer 10 executes a program (that is, software), thereby realizing the processes shown in FIGS. Instead, at least one of the processes in FIGS. 2 to 12 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: communication system, 10: printer, 12: operation unit, 14: display unit, 16: print execution unit, 18: wireless LAN I / F, 20: control unit, 22: CPU, 24: memory, 50: terminal device

Claims (7)

A wireless communication device,
A receiving unit that receives a signal for forming a specific wireless network including the wireless communication device and the terminal device from a terminal device, wherein the specific wireless network operates as a master station. And a first wireless network in which the wireless communication device operates as a slave station, and a second wireless network in which the wireless communication device operates as the parent station and the terminal device operates as the slave station. The signal includes relationship information related to a frequency band to be used in the first wireless network, and a terminal-side index value preset in the terminal device, and the reception unit,
A first determination unit that determines whether the relationship information is information related to a first frequency band;
The terminal-side index value is compared with a device-side index value set in advance in the wireless communication device to determine whether the terminal device is more likely to become the parent station than the wireless communication device. A second determination unit;
In the first case where the relationship information is determined to be information related to the first frequency band, and the terminal device is determined to be more likely to become the parent station than the wireless communication device, the first A forming unit forming a second wireless network in which a second frequency band different from the first frequency band is to be used;
A wireless communication device. The wireless communication device further includes:
With a wireless communication interface,
The receiving unit receives the signal from the terminal device via the wireless communication interface;
The specific wireless network is a wireless network for executing wireless communication of target data with the terminal device via the wireless communication interface;
The wireless communication device according to claim 1, wherein the wireless communication interface does not support the first frequency band and supports the second frequency band.   The wireless communication device according to claim 1, wherein the signal is a request signal for requesting the wireless communication device to transmit a response signal including the device-side index value. The wireless communication device further includes:
In the first case, the first transmission unit transmits the response signal including a specific index value different from the device-side index value to the terminal device, and the specific index value is the wireless communication The first transmission unit, which is a value indicating that the device is more likely to be the master station than the terminal device,
The forming unit forms the second wireless network in which the second frequency band should be used after the response signal is transmitted to the terminal device in the first case. The wireless communication device described. The wireless communication device further includes:
A second transmission unit configured to transmit the response signal including the device-side index value to the terminal device in a second case where the wireless communication device is determined to be more likely to become the parent station than the terminal device; ,
The forming unit further forms the second wireless network in which the second frequency band should be used after the response signal is transmitted to the terminal device in the second case. The wireless communication device according to 3 or 4. The wireless communication device further includes:
In the third case where it is determined that the relationship information is not information related to the first frequency band due to the relationship information being information related to the second frequency band, the device side A third transmitter that transmits the response signal including an index value to the terminal device;
In the third case, the forming unit further indicates that the relationship between the terminal-side index value and the device-side index value indicates that the wireless communication device is more likely to become the parent station than the terminal device. And forming the second wireless network in which the second frequency band is to be used after the response signal is transmitted to the terminal device,
In the third case, the wireless communication device further indicates that the relationship between the terminal-side index value and the device-side index value indicates that the terminal device is more likely to be the parent station than the wireless communication device. In any case, after the said response signal is transmitted to the said terminal device, the participation part which participates in the said 1st radio | wireless network by which a said 2nd frequency band should be utilized is provided. The wireless communication device according to Item. A computer program for a wireless communication device,
In the computer mounted on the wireless communication device, the following processes, that is,
A reception process for receiving a signal for forming a specific wireless network including the wireless communication device and the terminal device from a terminal device, wherein the terminal device operates as a master station in the specific wireless network And a first wireless network in which the wireless communication device operates as a slave station, and a second wireless network in which the wireless communication device operates as the parent station and the terminal device operates as the slave station. The signal includes relationship information related to a frequency band to be used in the first wireless network, and a terminal-side index value preset in the terminal device, and the reception process,
A first determination process for determining whether or not the relationship information is information related to a first frequency band;
The terminal-side index value is compared with a device-side index value set in advance in the wireless communication device to determine whether the terminal device is more likely to become the parent station than the wireless communication device. A second determination process;
In the first case where the relationship information is determined to be information related to the first frequency band, and the terminal device is determined to be more likely to become the parent station than the wireless communication device, the first A forming process for forming a second wireless network in which a second frequency band different from the first frequency band is to be used;
A computer program that executes

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