JP2016076892A - Communication equipment, control method for communication equipment, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem that achieving both of shortening a connection time and maintaining security is not sufficiently considered in conventional handover.SOLUTION: Communication equipment includes: first communication means for communicating with an external device via first radio communication; second communication means for communicating with the external device via second radio communication; and control means for, when the second communication means communicates with the external device, and an instruction to communicate with the external device by the first communication means is received, controlling the first communication means to communicate with the external device, therein a calculation amount in the case of generating a communication parameter to be used in the case of communicating with the external device via the first radio communication in response to the instruction is made different from a calculation amount in the case of generating a communication parameter to be used in the case of communicating with the external device via the first radio communication according as the second communication means communicates with the external device.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a communication apparatus capable of communicating with other devices via wireless communication.

  In recent years, a digital camera that is connected to a mobile phone via a wireless LAN (Local Area Network) and can exchange image data has been known. In addition, in order to omit part of the procedure that the user has to operate for the connection via the wireless communication, the communication parameters for the connection via the wireless communication are shared using the other wireless communication. Technology (so-called handover) is known. For example, Patent Document 1 discloses that communication parameters for connecting devices via a wireless LAN are shared between the devices using NFC (Near Field Communication).

JP 2013-157736 A

  The wireless LAN connection by the above-described handover can be easily used, so it is considered that it is often used particularly for a scene or the like where it is desired to communicate temporarily. In such a scene, it is desirable to shorten the time required for connection as compared with a method of operating a menu of a digital camera and wirelessly connecting wireless communication terminals to transfer an image. As a means for shortening the time required for connection, it is conceivable to reduce the security key calculation and verification time by turning off the security setting. However, since wireless communication is more likely to be intercepted than wired communication, it is not desirable to reduce security.

  Therefore, an object of the present invention is to achieve both shortening of connection time and maintaining security in handover.

  In order to achieve the above object, a communication device of the present invention includes a first communication unit that communicates with an external device via a first wireless communication, and a second wireless communication that is different from the first wireless communication. A second communication unit that communicates with the external device, a reception unit that receives an instruction to communicate with the external device through the first communication unit, a generation unit that generates communication parameters for the first wireless communication, When the second communication means communicates with the external device and when the first communication means accepts an instruction to communicate with the external device, the first communication means controls to communicate with the external device. Control means, and the generation means generates communication parameters used when communicating with the external device via the first wireless communication according to an instruction received by the reception means And a calculation for generating communication parameters used when communicating with the external device via the first wireless communication in response to communication with the external device by the second communication means. It is characterized by different amounts.

  According to the present invention, it is possible to reduce both connection time and maintain security in handover.

(A) It is a block diagram of the digital camera in 1st Embodiment. (B), (c) is an external view of the digital camera in the first embodiment. It is a block diagram which shows the structure of the smart device in 1st Embodiment. It is a sequence diagram which shows the procedure in which a digital camera and a smart device connect by wireless LAN according to menu operation in 1st Embodiment. (A) It is the figure which showed an example of the information which the control part of a digital camera writes in the non-volatile memory of the near field communication part in the digital camera in 1st Embodiment. (B) It is the figure which showed an example of the information which the near field communication part of a smart device writes in the non-volatile memory of the near field communication part in the digital camera in 1st Embodiment. It is a sequence diagram which shows the procedure in which a digital camera and a smart device connect by wireless LAN according to NFC communication in 1st Embodiment. (A) It is a conceptual diagram which shows the information which the control part of a digital camera writes in the non-volatile memory of the short distance wireless communication part of the digital camera in 1st Embodiment. (B) It is a conceptual diagram which shows the information which the near field communication part of a smart device writes in the non-volatile memory of the near field communication part of the digital camera in 1st Embodiment. 3 is a flowchart illustrating processing of the digital camera 100 according to the first embodiment. It is a flowchart which shows the process of the smart device 200 in 1st Embodiment.

  EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated in detail using attached drawing.

  The embodiment described below is an example as means for realizing the present invention, and may be appropriately modified or changed depending on the configuration of the apparatus to which the present invention is applied and various conditions. Moreover, it is also possible to combine each embodiment suitably.

[First Embodiment]
<Configuration of Digital Camera 100>
FIG. 1A is a block diagram illustrating a configuration example of a digital camera 100 that is an example of a communication apparatus according to the present embodiment. Although a digital camera is described here as an example of a communication device, the communication device is not limited to this. For example, the communication device may be an information processing device such as a mobile phone, a portable media player, a so-called tablet device, or a personal computer.

  The control unit 101 controls each unit of the digital camera 100 according to an input signal and a program described later. Note that instead of the control unit 101 controlling the entire apparatus, a plurality of hardware may share the processing to control the entire apparatus.

  The imaging unit 102 includes, for example, an optical lens unit, an optical system that controls the aperture, zoom, focus, and the like, and an imaging device that converts light (video) introduced through the optical lens unit into an electrical video signal. Composed. In general, a CMOS (Complementary Metal Oxide Semiconductor) or a CCD (Charge Coupled Device) is used as the imaging element. The imaging unit 102 is controlled by the control unit 101 to convert subject light imaged by a lens included in the imaging unit 102 into an electrical signal by the imaging device, and perform noise reduction processing or the like to convert the digital data into an image. Output as data. In the digital camera 100 of the present embodiment, the image data is recorded on the recording medium 110 in accordance with the DCF (Design Rule for Camera File System) standard.

  The non-volatile memory 103 is an electrically erasable / recordable non-volatile memory, and stores a program to be described later executed by the control unit 101.

  The work memory 104 is used as a buffer memory that temporarily holds image data picked up by the image pickup unit 102, an image display memory of the display unit 106, a work area of the control unit 101, and the like.

  The operation unit 105 is used for the user to accept an instruction for the digital camera 100 from the user. The operation unit 105 includes, for example, a power button for instructing the user to turn on / off the digital camera 100, a release switch for instructing photographing, and a reproduction button for instructing reproduction of image data. Furthermore, an operation member such as a dedicated connection button for starting communication with an external device via a connection unit 111 described later is included. A touch panel formed on the display unit 106 described later is also included in the operation unit 105. The release switch has SW1 and SW2. When the release switch is in a so-called half-pressed state, SW1 is turned on. As a result, an instruction for making preparations for shooting such as AF (autofocus) processing, AE (automatic exposure) processing, AWB (auto white balance) processing, and EF (flash pre-emission) processing is accepted. Further, when the release switch is in a fully-pressed state, SW2 is turned on. As a result, an instruction for photographing is received.

  The display unit 106 displays a viewfinder image at the time of shooting, displays shot image data, and displays characters for interactive operation. Note that the display unit 106 is not necessarily built in the digital camera 100. The digital camera 100 can be connected to an internal or external display unit 106 and only needs to have at least a display control function for controlling display on the display unit 106.

  The recording medium 110 can record the image data output from the imaging unit 102. The recording medium 110 may be configured to be detachable from the digital camera 100 or may be built in the digital camera 100. That is, the digital camera 100 only needs to have a means for accessing at least the recording medium 110.

  The connection unit 111 is an interface for connecting to an external device. The digital camera 100 of this embodiment can exchange data with an external device via the connection unit 111. For example, the image data generated by the imaging unit 102 can be transmitted to the external device via the connection unit 111. In the present embodiment, the connection unit 111 includes an interface for communicating with an external apparatus via a so-called wireless LAN in accordance with the IEEE 802.11 standard. The control unit 101 realizes wireless communication with an external device by controlling the connection unit 111. Note that the communication method is not limited to the wireless LAN, and other wireless communication methods such as an infrared communication method, Bluetooth (registered trademark), and WirelessUSB may be adopted.

  The short-range wireless communication unit 112 includes, for example, an antenna for wireless communication and a modulation / demodulation circuit and a communication controller for processing a wireless signal. The short-range wireless communication unit 112 outputs non-contact proximity communication by outputting a modulated wireless signal from an antenna and demodulating the wireless signal received by the antenna. In this embodiment, non-contact proximity communication in accordance with the ISO / IEC 18092 standard (so-called NFC: Near Field Communication) is realized. In addition, data exchanged in NFC communication conforms to the NDEF (NFC Data Exchange Format) format. The short-range wireless communication unit 112 of the present embodiment is disposed on the side of the digital camera 100.

  A smart device 200, which will be described later, is connected by starting communication by bringing the short-range wireless communication units close to each other. In addition, when connecting using a short-distance wireless communication part, it is not necessarily required to contact short-distance wireless communication parts. Since the short-range wireless communication unit can communicate even if they are separated from each other by a certain distance, in order to connect the devices to each other, it is only necessary to approach the range where close-range wireless communication is possible. In the following description, it is also referred to as bringing close to the range where close proximity wireless communication is possible.

  Moreover, if the mutual short-range wireless communication units are in a range where communication is not possible, communication is not started. In addition, when the short-range wireless communication units of each other are in a communicable range and the digital cameras 100 are connected to each other, the short-range wireless communication units 112 of each other are separated from a range incapable of communication. In the case, the communication connection is released. Note that the non-contact proximity communication realized by the short-range wireless communication unit 112 is not limited to NFC, and other wireless communication may be employed. For example, non-contact proximity communication according to the ISO / IEC 14443 standard may be adopted as non-contact proximity communication realized by the short-range wireless communication unit 112.

  In the present embodiment, the communication speed realized by the connection unit 111 is faster than the communication speed realized by the short-range wireless communication unit 112 described later. Further, the communication realized by the connection unit 111 has a wider communication range than the communication by the short-range wireless communication unit 112. Instead, in the communication by the short-range wireless communication unit 112, the communication partner can be limited by the narrowness of the communicable range, so processing such as exchange of encryption keys necessary for communication realized by the connection unit 111 is performed. do not need. That is, it is possible to communicate more easily than using the connection unit 111.

  Note that the connection unit 111 of the digital camera 100 in this embodiment has an AP mode that operates as an access point in the infrastructure mode, and a CL mode that operates as a client in the infrastructure mode. Then, by operating the connection unit 111 in the CL mode, the digital camera 100 in the present embodiment can operate as a CL device in the infrastructure mode. When the digital camera 100 operates as a CL device, it can participate in a network formed by the AP device by connecting to a peripheral AP device. In addition, by operating the connection unit 111 in the AP mode, the digital camera 100 in the present embodiment is a kind of AP, but operates as a simple AP (hereinafter referred to as a simple AP) with more limited functions. Is also possible. When the digital camera 100 operates as a simple AP, the digital camera 100 forms a network by itself. Devices around the digital camera 100 can recognize the digital camera 100 as an AP device and participate in a network formed by the digital camera 100. It is assumed that a program for operating the digital camera 100 is held in the nonvolatile memory 103 as described above.

  Note that although the digital camera 100 in this embodiment is a kind of AP, it is a simple AP that does not have a gateway function for transferring data received from a CL device to an Internet provider or the like. Therefore, even if data is received from another device participating in the network formed by the own device, it cannot be transferred to a network such as the Internet.

  Next, the appearance of the digital camera 100 will be described. 1B and 1C are diagrams illustrating an example of the appearance of the digital camera 100. FIG. The release switch 105a, the playback button 105b, the direction key 105c, and the touch panel 105d are operation members included in the operation unit 105 described above. Further, the display unit 106 displays an image obtained as a result of imaging by the imaging unit 102. In addition, the digital camera 100 of the present embodiment has an antenna portion of the short-range wireless communication unit 112 on the side surface of the camera housing. Proximity wireless communication can be established with other devices by bringing the short-range wireless communication units 112 close to each other. Thereby, it is possible to communicate in a non-contact manner without using a cable or the like, and it is possible to limit communication partners according to the user's intention.

  The above is the description of the digital camera 100.

<About the internal configuration of the smart device 200>
FIG. 2 is a block diagram illustrating a configuration example of the smart device 200 that is an example of the information processing apparatus according to the present embodiment. Smart devices include mobile phones such as smartphones and so-called tablet devices. Although a smart device is described here as an example of an information processing apparatus, the information processing apparatus is not limited to this. For example, the information processing apparatus may be a digital camera with a wireless function, a printer, a television, or a personal computer.

  The control unit 201 controls each unit of the smart device 200 according to an input signal and a program described later. Note that instead of the control unit 201 controlling the entire apparatus, the entire apparatus may be controlled by a plurality of pieces of hardware sharing the processing.

  The imaging unit 202 converts subject light imaged by a lens included in the imaging unit 202 into an electrical signal, performs noise reduction processing, and outputs digital data as image data. The captured image data is stored in the buffer memory, and then a predetermined calculation is performed by the control unit 201 and recorded on the recording medium 210.

  The nonvolatile memory 203 is an electrically erasable / recordable nonvolatile memory. The nonvolatile memory 203 stores an OS (operating system) that is basic software executed by the control unit 201 and an application that realizes an applied function in cooperation with the OS. In the present embodiment, the nonvolatile memory 203 stores an application (hereinafter referred to as an application) for communicating with the digital camera 100.

  The work memory 204 is used as an image display memory of the display unit 206, a work area of the control unit 201, and the like.

  The operation unit 205 is used to receive an instruction for the smart device 200 from a user. The operation unit 205 includes, for example, operation members such as a power button for the user to instruct ON / OFF of the power supply of the smart device 200 and a touch panel formed on the display unit 206.

  The display unit 206 displays image data, characters for interactive operation, and the like. Note that the display unit 206 is not necessarily provided in the smart device 200. The smart device 200 can be connected to the display unit 206 and need only have at least a display control function for controlling the display of the display unit 206.

  The recording medium 210 can record image data output from the imaging unit 202. The recording medium 210 may be configured to be detachable from the smart device 200 or may be built in the smart device 200. That is, the smart device 200 may have at least a means for accessing the recording medium 210.

  The connection unit 211 is an interface for connecting to an external device. The smart device 200 according to the present embodiment can exchange data with the digital camera 100 via the connection unit 211. In the present embodiment, the connection unit 211 is an antenna, and the control unit 101 can be connected to the digital camera 100 via the antenna. In connection with the digital camera 100, it may be connected directly or via an access point. As a protocol for communicating data, for example, PTP / IP (Picture Transfer Protocol over Internet Protocol) through a wireless LAN can be used. Note that communication with the digital camera 100 is not limited to this. For example, as the connection unit 211, another wireless communication module such as an infrared communication module, a Bluetooth (registered trademark) communication module, or a wireless USB may be employed.

  The short-range wireless communication unit 212 is a communication unit for realizing non-contact short-range communication with other devices. The short-range wireless communication unit 212 includes an antenna for wireless communication, a modulation / demodulation circuit for processing wireless signals, and a communication controller. The short-range wireless communication unit 212 outputs non-contact short-range communication by outputting a modulated wireless signal from the antenna and demodulating the wireless signal received by the antenna. Here, non-contact communication according to the ISO / IEC 18092 standard (so-called NFC) is realized. Upon receiving a data read request from another device, the short-range wireless communication unit 212 outputs response data based on the data stored in the nonvolatile memory 203. In the present embodiment, the smart device 200 operates in the card reader mode, the card writer mode, and the P2P mode defined by the NFC standard through the short-range wireless communication unit 212, and mainly acts as an initiator. On the other hand, the digital camera 100 mainly acts as a Target via the short-range wireless communication unit 112.

  The public network connection unit 213 is an interface used when performing public wireless communication. The smart device 200 can make a call with another device via the public network connection unit 213. At this time, the control unit 201 inputs and outputs an audio signal via the microphone 214 and the speaker 215, thereby realizing a call. In the present embodiment, the public network connection unit 213 is an antenna, and the control unit 101 can be connected to the public network via the antenna. Note that the connection unit 211 and the public network connection unit 213 can be shared by a single antenna.

  The above is the description of the smart device 200.

<Procedure for sending images by menu operation>
Next, in the digital camera 100, a procedure for transmitting an image through a wireless LAN connection with a smart device from a menu screen by a user operation will be described with reference to FIGS. 3 and 4A.

  FIG. 3 is a sequence diagram illustrating a process of transmitting an image by connecting to the smart device 200 via a wireless LAN from a menu screen displayed on the display unit 106 by a user operation in the digital camera 100 according to the first embodiment.

  FIG. 4A is a screen transition diagram when the digital camera 100 according to the first embodiment transmits an image through a wireless LAN connection with the smart device 200 from a menu screen displayed on the display unit 106 by a user operation.

  First, in step S301, the digital camera 100 displays the screen 401 in FIG. 4 on the display unit 106, and accepts selection of an icon (icon 450 on the screen 401) for executing a function for connecting to the smart device. The user can input an instruction to execute a function of connecting to the smart device by selecting the icon 450 via the operation unit 105 (for example, a touch panel). In this screen 401, icons for using other communication functions are also displayed. For example, instead of a smart device, an icon for executing a function for connecting to another camera and an icon for executing a function for connecting to a PC in which a corresponding application is installed are displayed. In addition, icons for executing a function of uploading content to a network SNS or an online album website are also displayed. When the control unit 101 detects selection of the icon 450, the process for wireless LAN connection (that is, the process after step S302) is started. For example, Wi-Fi can be adopted as the wireless LAN standard.

  Next, in step S302, the control unit 101 prepares for starting the simple AP. Specifically, before starting a simple AP and starting beacon transmission, communication parameters for the wireless LAN (here, at least a network identifier SSID (Service Set Identifier) and an encryption key) are generated. In the present embodiment, as the SSID and encryption key to be generated, values that are randomly determined every time this step is executed are used. That is, each time the user starts a wireless LAN connection by a menu operation, a different communication parameter is generated each time. The SSID is generated based on device information recorded in advance in a nonvolatile memory. The device information includes, for example, a device name and individual identification information (GUID: Globally Unique Identifier, UUID: Universally Unique Identifier, etc.). The encryption key is generated by repeating the encryption calculation using the generated random number as a passphrase. For example, the encryption key is generated by the method presented in the IEEE 802.11i standard. The process of this step executes a large amount of calculation to generate an encryption key by repeating the hash function calculation 4096 times for the passphrase. Therefore, it takes a certain amount of time to generate the encryption key.

  Next, in step S303, the control unit 101 activates a simple AP using the SSID and encryption key generated in step S302, generates a wireless LAN network, and displays a screen 402. Before step S302, a list of devices that have been connected in the past (so-called connection history list) is displayed, and whether to connect to devices that have been connected in the past or to connect to new devices. The user may be prompted to make a selection. In this case, the communication parameters used for connection with a device that has been connected in the past are held together with the individual identification information of the device that has been connected in the past. If a connection with a device that has been connected in the past is selected, a wireless LAN network is generated using the held communication parameters. As a result, the same communication parameters as the history held on the smart device side are used, so that the operation on the smart device side can be selected from the history, and the labor of inputting a new path can be saved.

  Next, in step S304, the control unit 101 activates a DHCP (Dynamic Host Configuration Protocol) server and prepares to allocate an IP address to a device that has joined the network generated by the simple AP.

  Next, in step S305, the control unit 101 starts searching for devices. Note that a discovery protocol is used for device search, and for example, SSDP (Single Service Discovery Protocol) or Maltic DNS can be used.

  Next, in step S306, the smart device 200 receives an instruction to start wireless LAN setting. The user can instruct execution of the process of this step by selecting a menu for inputting an instruction to start the wireless LA setting from the OS menu. When the wireless LAN setting is started, an SSID list display screen (not shown) is displayed on the display unit 206.

  On the other hand, in step S307, the smart device 200 accepts selection of the simple AP network generated by the digital camera 100 from the SSID list displayed on the display unit 206 in step S305. At this time, the network communication parameters generated by the digital camera 100 are displayed on the display unit 106 of the digital camera 100 as shown in the screen 402. The user can select the SSID of the network generated by the digital camera 100 from the SSIDs displayed in the SSID list while viewing the SSID displayed on the screen 402 of the digital camera 100.

  Next, when a network is selected by a user operation in step S <b> 308, the smart device 200 participates in the simple AP network of the digital camera 100.

  When the smart device 200 joins the network, the digital camera 100 sets an IP address for the smart device 200 in step S309. Through the processing so far, the connection between the digital camera 100 and the smart device 200 is established at the network level.

  Subsequently, connection is established at the application level by the subsequent processing. In step S <b> 310, the smart device 200 receives an instruction to start an application stored in the non-volatile memory 203 of the smart device from the user via the operation unit 205.

  Next, in step S <b> 311, the smart device 200 broadcasts an advertisement notification in the joined network according to the control of the activated application, and notifies the digital camera 100 of its presence. Note that a discovery protocol is used for the advertisement notification, and for example, SSDP (Single Service Discovery Protocol), Malicast DNS, or the like can be used.

  Next, in step S312, if the control unit 101 of the digital camera 100 receives the advertisement notification in step S310, the control unit 101 controls the display unit 106 to display the device name included in the advertisement. Here, the screen 403 of FIG. 4 is displayed on the display unit 106 to show the user a list of connectable devices. Note that a plurality of smart devices can participate in the network generated by the digital camera 100 (that is, one-to-many connection is possible at the network level). For this reason, since advertisements may be received from a plurality of devices, in this step, the user is prompted to select which device to establish a connection at the application level. The user can select a device to be connected from the screen 403 by operating the operation unit 105.

  In step S313, when the control unit 101 of the digital camera 100 detects that a device to be connected is selected, the control unit 101 starts connection processing with the smart device 200 that is the selected connection target device. At the same time, a screen 404 is displayed on the display unit 106.

  Next, in step S <b> 314, the control unit 201 of the smart device 200 notifies the digital camera 100 whether connection is possible.

  Next, in step S315, application level connection between the digital camera 100 and the smart device 200 is completed. When the control unit 101 detects that the connection with the smart device 200 is completed, the control unit 101 displays a screen 405 or a screen 407. On these screens, images to be transmitted are displayed, and an image transmission service is started.

  Next, in step S316, an image to be transmitted is selected by a user operation. When only one image is transmitted, a button for executing transmission of one image reproduced and displayed from the screen 405 is selected. When transmitting a plurality of images, it is possible to change to the screen 407 and select a plurality of images at a time. When the control unit 101 detects that a plurality of image selections are selected and a button for executing transmission is selected, the control unit 101 displays a screen 408 on the display unit 106 for user confirmation before image transmission. The user transmits the image again by selecting a button for executing the image transmission.

  Next, in step S317, the control unit 101 transmits the image selected by the user operation to the smart device 200. The communication protocol for executing image transmission may be, for example, HTTP (Hyper Text Transfer Protocol), PTP-IP (Picture Transfer Protocol over IP), or the like. During image transmission, the control unit 101 displays a screen 406 on the display unit 106 to indicate to the user the progress of the image transmission.

  Finally, in step S318, when the control unit 101 detects the completion of image transmission, the control unit 101 displays on the display unit 106 that the image transmission has been completed (not shown). After that, the digital camera 100 can proceed to selection and transmission of an image to be transmitted again, and can exit the image transmission mode and transition to the shooting mode, the image reproduction mode, or shut down. is there.

  The above is the procedure for transmitting an image through a wireless LAN connection with the smart device from the menu screen in the digital camera 100 by a user operation.

<Procedure for wireless LAN connection triggered by NFC communication>
Next, in the digital camera 100 and the smart device 200, a procedure for transmitting an image through wireless LAN connection triggered by non-contact communication (hereinafter referred to as NFC touch communication) between short-range wireless communication units will be described with reference to FIGS. (B) will be described with reference to FIG.

  FIG. 5 shows that the short-range wireless communication unit 112 of the digital camera 100 according to the first embodiment transmits an image by connecting to the smart device 200 and a wireless LAN using NFC touch communication as a trigger with the short-range wireless communication unit 212 of the smart device 200. It is a sequence diagram which shows the process to perform.

  FIG. 4B shows that the short-range wireless communication unit 112 of the digital camera 100 in the first embodiment is connected to the smart device 200 and the wireless LAN using NFC touch communication as a trigger with the short-range wireless communication unit 212 of the smart device 200. It is a screen transition diagram at the time of transmitting an image.

  FIG. 6A is a conceptual diagram illustrating a structure of information 600 written by the control unit 101 of the digital camera 100 in the nonvolatile memory of the short-range wireless communication unit 112 in the digital camera 100 according to the first embodiment.

  FIG. 6B is a conceptual diagram illustrating a structure of information 610 written by the short-range wireless communication unit of the smart device 200 in the nonvolatile memory of the short-range wireless communication unit 112 in the digital camera 100 according to the first embodiment.

  First, in step S501, it is detected that the digital camera 100 and the smart device 200 are close to each other. Here, a case where the users approach each other by bringing them closer to each other will be described as an example. An example will be described in which the near field communication unit 112 of the digital camera 100 is an NFC tag and the near field communication unit 212 of the smart device 200 is an NFC reader / writer. At this time, the digital camera 100 reproduces an image on the display unit 106 like the screen 411 in the image reproduction mode. The smart device 200 is in a state where the basic software is activated.

  Next, in step S <b> 502, when the control unit 201 detects that the proximity wireless communication is started, the control unit 201 transmits the information 600 stored in the nonvolatile memory of the short-range wireless communication unit 112 to the short-range wireless communication unit 212. Read through. The information 600 to be read here includes digital camera model information that is information relating to the digital camera 100 itself and corresponding application information that indicates an application that the digital camera 100 supports. Furthermore, simple AP information including communication parameters used in the simple AP function of the digital camera 100 is included.

  The digital camera model information includes a product type 601 and generation information 602 of the digital camera 100, a model ID 603, and a GUID 604 for identifying the individual digital camera 100. Further, status information 605 indicating whether the digital camera 100 is in a state where wireless communication with the smart device 200 is possible is included.

  Also, the corresponding application information includes a package name 606 indicating an application that operates on the smart device 200 and cooperates with the digital camera 100 via wireless LAN communication and can acquire image data and various information in the camera. Including.

  Further, the simple AP information includes SSID 607, Security Key 608 that is a pass phrase of the encryption key, and the like.

  These pieces of information are written in advance in the non-volatile memory of the short-range wireless communication unit 112 by the control unit 101 before performing NFC touch communication with the smart device 200 (for example, timing when the digital camera 100 is turned off). Unlike the case of wireless LAN connection from menu operation, the SSID stored in the nonvolatile memory of the short-range wireless communication unit 112 uses a fixed value that is unique for each digital camera. For example, the SSID calculated from the MAC address assigned to the connection unit 111 is used. This is done for the following reason. That is, the procedure for establishing a wireless LAN connection via NFC can be used easily because it does not require the input of a password. At this time, if a different SSID is used each time, a number of SSID records that are not used thereafter remain in the history on the smart device side. In order to prevent this, a fixed value is used for the SSID stored in the nonvolatile memory of the short-range wireless communication unit 112. SecurityKey gives priority to security, and stores a randomly generated value in the non-volatile memory of the short-range wireless communication unit 112 each time. Note that the number of characters of SecurityKey may be reduced as compared with the case of wireless LAN connection from the menu operation. In such a case, the smart device may compensate for the insufficient number of characters. In this case, how to compensate for the number of characters is defined in advance, and the network may be generated by calculating a corresponding value on the digital camera 100 side accordingly. For example, a method of compensating for the number of characters by adding zero to the beginning or end of the reduced character string can be employed.

  Next, in step S503, the control unit 201 analyzes the read package name 606 and activates an application corresponding to the package name. Next, the control unit 201 analyzes the information 600 according to an instruction of the application, and uses a digital camera that supports image transfer via the wireless LAN connection with the smart device 200 from the product type 601, generation information 602, model ID 603, and the like. It is determined whether or not there is. Further, the smart device 200 determines from the status information 605 whether the digital camera 100 is currently in a state in which wireless communication with the smart device 200 is possible. For example, if the user has set not to use the wireless LAN from the menu of the digital camera 100, the status information 605 is recorded with a value indicating that wireless LAN communication is not possible.

  Next, in step S <b> 504, the control unit 201 writes the smart device 200 information 610 into the short-range wireless communication unit 112 of the digital camera 100 through the short-range wireless communication unit 212. As a result, the digital camera 100 is informed that the reading of information in step S502 has been completed, and that the own device is compatible with the wireless LAN handover function.

  As shown in FIG. 3B, the information 610 written here includes application information including an application ID 611 and an application GUID 612, and simple AP information such as an SSID 613 and a Security Key 614. The simple AP information to be written here is the same information as the simple AP information included in the information 600 read from the short-range wireless communication unit 112 of the digital camera 100 in step S502. Further, the main writing is performed so that the information of the digital camera 100 in FIG. 6A is overwritten from the top of the nonvolatile memory included in the short-range wireless communication unit 112.

  Here, the information read in step S502 is overwritten for the following reason. That is, the writing of NDEF data to the recording area of the short-range wireless communication unit 112 (here, the NFC tag) can be easily implemented by using, for example, an API provided by the OS. For example, to write an NFC tag in a recording area, it is necessary to specify what size data is to be written in which area, or to update attribute information of the area after writing. However, if the API is used, the application only has to specify the data to be written. In other words, the developer need only be aware of the handling of the payload portion of the data. However, APIs often give priority to easy implementation, and there are cases where detailed instructions cannot be input. For example, it may be difficult to rewrite only predetermined items while leaving items other than the predetermined items as they are. For example, if the application simply instructs the OS to write the information 610 of the smart device 200 and does not instruct data to be written in the other area, information indicating that nothing is recorded in the other area is an NDEF header. Will be written to. That is, it is handled in the same manner as when data in other areas is deleted. In this case, inconvenience occurs in the following points. That is, when the digital camera 100 generates a network, the communication parameter recorded in the recording area of the NFC tag is used. As a result, the communication parameters are shared with the smart device 200. However, when the communication parameter is deleted along with the fact that the smart device 200 has finished reading the information of the NFC tag, the digital camera 100 sets the communication parameter used when generating the network as the NFC tag. Cannot be obtained from the recording area. Therefore, the smart device 200 writes back the information of the NFC tag that has just been read, in addition to the completion of reading the information of the NFC tag. As a result, at least items in which communication parameters are recorded are set to the same state as before reading the NFC tag so that the digital camera 100 can obtain communication parameters used for network generation.

  In step S <b> 505, the control unit 201 waits by repeating the search for the wireless LAN network until the digital camera 100 generates a simple AP wireless LAN network.

  On the other hand, in step S506, when the digital camera 100 detects that information 610 has been written from the smart device 200 to the nonvolatile memory of the short-range wireless communication unit 112 in step S506, the screen 412 is displayed on the display unit 106. .

  In step S 507, the information 610 stored in the nonvolatile memory of the short-range wireless communication unit 112 is read and developed in the work memory 104.

  Next, in step S508, the control unit 101 analyzes the information 610, and determines from the application ID 611 or the like whether or not the writing is from a smart device that supports image transfer via the wireless LAN connection with the digital camera 100. To do.

  Next, in step S509, the control unit 101 converts the information in the non-volatile memory of the short-range wireless communication unit 112 written in the smart device 200 in step S504 into the configuration of the information 600 indicating the digital camera 100 again. return. Specifically, the information 600 of the digital camera 100 is written in the nonvolatile memory of the short-range wireless communication unit 112. At this time, the SecurityKey 608 is written with a SecurityKey different from the SecurityKey read in Step S502 for the next NFC touch connection. For example, it is a random number generated before the control unit 101 writes the information 600 in the nonvolatile memory of the short-range wireless communication unit 112. As a result, the communication parameters of the NFC tag are recorded as parameters that are not parameters used for wireless LAN connection with the smart device 200 to be connected. Therefore, it is possible to prevent the parameters used in the wireless LAN connection with the smart device 200 to be connected from being read just by approaching. That is, security can be further improved. As described above, the same SSID as the SSID read in step S502 is written as the SSID. Further, since the digital camera 100 performs wireless LAN connection with the smart device 200 thereafter, it does not connect with other devices. Therefore, information indicating a state in which wireless LAN communication is not possible is previously written in the state information 605 to prevent the corresponding smart device from attempting to connect to the wireless LAN.

  Next, in step S510, the control unit 101 prepares to start the simple AP. Before starting the simple AP, an SSID and an encryption key are generated. The SSID is generated based on the SSID 613 developed in the work memory 104 in S507. Similarly, the encryption key is generated based on the SecurityKey 614 expanded in the work memory 104 in S507. At this time, as compared with S302 in FIG. 3, an encryption key is generated by reducing the amount of calculation, and the generation time is shortened. For example, the number of times the hash function calculation is repeated is set to 10 instead of 4096.

  Next, in step S511, the control unit 101 activates the simple AP, generates a wireless LAN network, and waits for the smart device 200 to join the network.

  Next, in step S512, the control unit 101 activates a DHCP server. In this step, processing similar to that in step S303 is executed.

  Next, in step S513, the control unit 201 participates in the simple AP wireless LAN network generated by the digital camera 100 in step S511 based on the SSID 607 and the Security Key 608 read in step S502.

  Next, in step S514, the control unit 101 sets an IP address for the smart device 200. This step is processed in the same manner as step S308.

  Next, in step S515, the control unit 101 starts connection processing with the smart device 200 and displays the screen 413 on the display unit 106.

  Next, in step S516, the control unit 201 notifies the digital camera 100 of whether connection is possible.

  Next, in step S517, the connection between the digital camera 100 and the smart device 200 is completed. When the control unit 101 detects that the connection with the smart device 200 is completed, the control unit 101 displays a screen 414 or a screen 416 and displays an image to be transmitted on the display unit 106.

  Next, in step S518, the digital camera 100 accepts selection of an image to be transmitted. When only one image is transmitted, a button for executing transmission of one image reproduced and displayed from the screen 414 is selected. When transmitting a plurality of images, it is possible to change to the screen 416 and select a plurality of images at a time. When the selection of a plurality of images is selected and it is detected that a button for executing transmission is selected, the control unit 101 displays a screen 417 on the display unit 106 for user confirmation before image transmission. The user transmits the image again by selecting a button for executing the image transmission.

  Next, in step S519, the control unit 101 transmits the image selected by the user operation to the smart device 200. For example, HTTP (Hyper Text Transfer Protocol) or PTP-IP (Picture Transfer Protocol over IP) can be used as a communication protocol for executing image transmission. During image transmission, the control unit 101 displays a screen 415 on the display unit 106 to indicate to the user the progress of the image transmission.

  Next, in step S520, when the control unit 101 detects the completion of image transmission, the control unit 101 displays on the display unit 106 that the image transmission has been completed (not shown). After that, the digital camera 100 can proceed to selection and transmission of an image to be transmitted again, and can exit the image transmission mode and transition to the shooting mode, the image reproduction mode, or shut down. is there. When the wireless LAN connection between the digital camera 100 and the smart device 200 is disconnected according to the user's instruction, the process proceeds to step S521. In addition, here, in order to simplify the explanation, a case where the wireless LAN connection is disconnected according to a user instruction will be described as an example, but the trigger for disconnecting the wireless LAN connection is not limited to the user instruction. . For example, the wireless LAN connection may be disconnected in response to the completion of image transmission.

  If the wireless LAN connection is disconnected, in step S521, the control unit 101 indicates a state in which wireless LAN communication is possible in the status information 605 of the information 600 stored in the nonvolatile memory of the short-range wireless communication unit 112. Write information.

  The above is the procedure for transmitting an image through wireless LAN connection in the digital camera 100 and the smart device 200 using the non-contact communication between the short-range wireless communication units as a trigger. In addition, after the above-described step S504 is completed, the user does not need to maintain a state in which the devices are brought close to each other. Further, even if NFC communication is disconnected after the wireless LAN connection is established, the wireless LAN connection is not affected. That is, the wireless LAN connection is maintained.

<Operation of Digital Camera 100>
Next, the operation of the digital camera 100 for realizing the above procedure will be described.

  FIG. 7 is a flowchart showing the operation of the digital camera 100 in the present embodiment.

  First, in step S <b> 701, the control unit 101 detects whether or not writing has been performed in the nonvolatile memory of the short-range wireless communication unit 112. The processing in this step corresponds to step S506 in FIG. If there is a write in the nonvolatile memory of the short-range wireless communication unit 112, the process proceeds to step S715, and if not, the process proceeds to step S702.

  First, the case where it progresses to step S702 is demonstrated.

  In step S <b> 702, the control unit 101 detects whether a menu for connecting to the smart device 200 and transmitting an image is selected by a user operation. If it is detected that the menu has been selected, the process proceeds to step S703. Otherwise, the process returns to step S701. Note that the processing in this step corresponds to step S301 in FIG.

  Next, in step S703, the control unit 101 prepares for starting a simple AP. That is, a random value wireless LAN communication parameter (at least SSID and encryption key) is generated. The processing in this step corresponds to step S302 in FIG.

  In step S704, the control unit 101 activates the simple AP function and starts broadcasting a beacon including the communication parameter generated in step S703. The processing in this step corresponds to step S303 in FIG.

  Next, in step S705, the control unit 101 activates a DHCP server. The processing in this step corresponds to step 304 in FIG.

  Next, in step S706, the control unit 101 starts device search. The processing in this step corresponds to step S305 in FIG.

  Next, in step S707, the control unit 101 detects whether or not a device has joined the simple AP network. If it is determined that the device has participated, the process proceeds to step S709. If not, the process ends. For example, after a predetermined time has passed, the fact that the device has not joined the network is displayed on the display unit 106 (not shown), but the simple AP is started.

  Next, in step S708, the control unit 101 assigns an IP address to a device that has joined the network. The processing in this step corresponds to S309.

  Next, in step S709, the control unit 101 detects whether a connectable counterpart device has been found. If it is detected in step S311 that the smart device 200 has advertised, the process proceeds to step S711. Otherwise, the process is terminated. For example, after a predetermined time has passed, the fact that the advertisement transmission has not been received is displayed on the display unit 106 (not shown), and the activation of the simple AP is terminated.

  Next, in step S710, the control unit 101 detects whether a partner device to be connected is selected by a user operation. The processing in this step corresponds to S312 in FIG.

  Next, in step S711, the control unit 101 starts connection processing with respect to the smart device 200 that is the counterpart device selected by the user operation. The processing in this step corresponds to steps S313 and S315 in FIG.

  Next, in step S712, the control unit 101 detects whether an image to be transmitted has been selected by a user operation. The processing in this step corresponds to step S316 in FIG.

  Next, in step S713, the control unit 101 transmits the selected image to the smart device 200. The processing in this step corresponds to step S317 in FIG. When the image transmission is completed, the image transmission process is terminated.

  This completes the description of the case where the process proceeds from step S701 to step S702.

  Next, the case where the process proceeds from step S701 to step S714 will be described.

  In step S714, the control unit 101 reads the information written in the nonvolatile memory of the short-range wireless communication unit 112 in step S701. The processing in this step corresponds to step S507 in FIG.

  Next, in step S715, the control unit 101 analyzes the read information. The processing in this step corresponds to step S508 in FIG. Note that, as a result of analyzing the information here, if it is detected that the writing is not from a smart device that supports image transfer via the wireless LAN connection with the digital camera 100, the processing of this flowchart ends. For example, the identifier indicating the application included in the information written by the smart device 200 is referenced to check whether the application is compatible. Also, it is checked whether SSID and SecurityKey are written without excess or deficiency. If it is determined that the application is not compatible, or if the SSID or Security Key information is insufficient, it is determined that the writing is not performed from a compatible smart device, and the processing of this flowchart is terminated.

  Next, in step S716, the control unit 101 writes information including communication parameters for the next and subsequent handovers in the nonvolatile memory of the short-range wireless communication unit 112. Of the communication parameters for handover written here, the same value is written for SSID every time, unlike step S703. This prevents unnecessary information from remaining in the connection history of the smart device 200. A random value is used for the SecurityKey. The processing in this step corresponds to step S509 in FIG.

  Next, in step S717, the control unit 101 prepares for starting a simple AP. Here, the SSID and the encryption key are generated not from the communication parameters written in the nonvolatile memory of the short-range wireless communication unit 112 in step S716 but from the communication parameters read in step S714. Here, the calculation for generating the encryption key has a smaller calculation amount than the calculation for generating the encryption key in step S703. Thereby, the time to wireless LAN connection is further shortened. The processing in this step corresponds to step S510 in FIG.

  Next, in step S718, the control unit 101 activates the simple AP. The processing in this step corresponds to step S511 in FIG.

  Next, in step S719, the control unit 101 activates the DCHP server. The processing in this step corresponds to step S512 in FIG.

  Next, in step S720, the control unit 101 performs processing for detecting whether or not a device has joined the simple AP network. If it is determined that the device has participated, the process proceeds to step S721. If not, the process ends. For example, after a predetermined time has passed, the fact that the device has not joined the network is displayed on the display unit 106 (not shown), but the simple AP is started.

  Next, in step S721, the control unit 101 assigns an IP address to the connected device. The processing in this step corresponds to step S514 in FIG.

  Next, in step S722, the control unit 101 starts connection processing for the smart device 200 that is a connected device. The processing in this step corresponds to steps S515 and S517 in FIG.

  Next, in step S723, the control unit 101 detects whether an image to be transmitted has been selected by a user operation. The processing in this step corresponds to step S518 in FIG.

  Next, in step S724, the control unit 101 transmits the selected image to the smart device 200. The processing in this step corresponds to step S519 in FIG. When the image transmission is completed, the image transmission process is terminated. Accordingly, the wireless LAN connection with the smart device 200 is disconnected.

  Finally, in step S725, the control unit 101 writes the status information of the digital camera 100 in the nonvolatile memory of the short-range wireless communication unit 112. Specifically, information indicating that a new wireless LAN connection is possible is written. Thereafter, for example, the digital camera 100 may be automatically turned off.

  The above is a flowchart showing the processing of the digital camera 100 in the present embodiment.

<Processing flow of smart device 200>
Next, the operation of the smart device 200 for realizing the above procedure will be described.

  FIG. 8 is a flowchart showing the operation of the smart device 200 in the present embodiment.

  First, in step S <b> 801, the control unit 201 detects whether the short-range wireless communication unit 212 has approached the short-range wireless communication unit 112 of the digital camera 100. The processing in this step corresponds to step S501 in FIG. If it is determined that they are close, the process proceeds to step S810; otherwise, the process proceeds to step S802.

  First, the case where it progresses to step S802 is demonstrated.

  In step S <b> 802, the control unit 201 detects whether a menu for connecting to the digital camera 100 and receiving an image is selected by a user operation. If it is detected that the menu has been selected, the process proceeds to step S803. Otherwise, the process returns to step S801.

  In step S <b> 803, the control unit 201 detects whether a setting menu for the wireless LAN network has been selected using the operation unit 205 by a user operation. The processing in this step corresponds to step S306 in FIG.

  Next, in step S804, the control unit 201 detects whether a network to be connected using the operation unit 205 is selected by a user operation. The processing in this step corresponds to step S307 in FIG.

  Next, in step S805, the control unit 201 participates in the network selected in step S804. The processing in this step corresponds to step S308 in FIG.

  Next, in step S806, the control unit 201 sets the IP address lent from the digital camera 100 in step S309 of FIG. 3 as the IP address of the smart device 200 by DHCP addressing.

  Next, in step S807, the control unit 201 activates an application for connecting to the digital camera 100 and receiving an image. The processing in this step corresponds to step S310 in FIG.

  In step S <b> 808, the control unit 201 performs advertisement transmission to the digital camera 100. The processing in this step corresponds to step S311 in FIG.

  Next, in step S809, the control unit 201 performs a connection process with the digital camera 100. The processing in this step corresponds to step S314 in FIG.

  Next, in step S810, the control unit 201 receives an image transmitted from the digital camera 100. When the reception of all images is completed, the digital camera 100 is notified that the image transmission is completed, and for example, although not shown, a reception completion message is displayed on the display unit 206, and the process ends.

  This completes the description of the case where the process proceeds from step S801 to step S802.

  Next, the case where the process proceeds from step S801 to step S811 will be described.

  In step S811, the control unit 201 reads information recorded in the nonvolatile memory of the short-range wireless communication unit 112 of the digital camera 100 from the short-range wireless communication unit 212. The processing in this step corresponds to step S502 in FIG. If the information read here is not the corresponding information, an error is notified and the processing of this flowchart is terminated. The case where the information is not corresponding may be, for example, the case where the read data is not NDEF data. Also, when the time for bringing the devices close to each other is short and they are separated before the reading is completed, the processing is ended after the error notification. In addition to this, even when the smart device 200 is already connected to another apparatus via a wireless LAN, the processing of this flowchart ends.

  Next, in step S812, the control unit 201 activates an application for connecting to the digital camera 100 and receiving an image based on the information read in step S811. The processing in this step corresponds to step S503 in FIG.

  Next, in step S813, the control unit 201 writes information from the short-range wireless communication unit 212 to the nonvolatile memory of the short-range wireless communication unit 112 of the digital camera 100. The information to be written here includes the SSID and SecurityKey read in step S811 in addition to the information of the smart device 200. The processing in this step corresponds to step S504 in FIG. If wireless LAN communication with another digital camera has already been established, the user is notified that the communication is in progress without passing through this step, and the processing of this flowchart ends.

  Next, in step S814, the control unit 201 searches for a wireless LAN network. Specifically, the SSID and SecurityKey read in step S811 are recorded as valid information in the SSID database managed by the OS. At the same time, the status of other SSIDs already managed is set to invalid. As a result, even if the wireless LAN network has already been joined, control is performed so as to leave the wireless LAN network and search only the network of the digital camera 100. The processing in this step corresponds to step S505 in FIG.

  Next, in step S815, the control unit 201 detects whether a network has been discovered. If a wireless LAN network is detected, the process proceeds to S816. Otherwise, the process is terminated. For example, after a predetermined time has passed, although not shown, the fact that no wireless LAN network has been found is displayed on the display unit 106, and the search for the wireless LAN network is terminated.

  Next, in step S816, the control unit 201 participates in the wireless LAN network. The processing in this step corresponds to step S513 in FIG.

  Next, in step S817, the control unit 201 sets the IP address lent from the digital camera 100 in step S514 of FIG. 5 as the IP address of the smart device 200 by DHCP addressing.

  Next, in step S818, the control unit 201 performs a connection process with the digital camera 100. The processing in this step corresponds to step S516 in FIG.

  Finally, in step S <b> 819, the control unit 201 receives an image transmitted from the digital camera 100. When the reception of all images is completed, the digital camera 100 is notified that the image transmission is completed, and for example, although not shown, a reception completion message is displayed on the display unit 206, and the process ends. The received image is stored in the same area as the area where the image obtained by the imaging unit 202 of the smart device 200 is stored.

  The above is a flowchart showing the processing of the smart device 200 in the present embodiment.

  As described above, in the present embodiment, the value of the encryption key used when the wireless LAN connection is established using non-contact wireless communication as a trigger, compared to the case where the encryption key value used when the wireless LAN connection is calculated from the menu operation. The amount of calculation was reduced. As a result, security can be maintained as compared with the case where the encryption key is not used, and wireless LAN connection can be established earlier than the case where the wireless LAN connection is made from the menu operation. That is, it is possible to achieve both shortening the connection time and maintaining security in handover.

[Other Embodiments]
In the above-described embodiment, it has been described that the SSID used when the wireless LAN connection is made from the menu operation is randomly generated, and that the SSID used when the wireless LAN connection is triggered by non-contact wireless communication uses a fixed value. For the SSID used for wireless LAN connection from this menu operation, a character string common to the SSID used for wireless LAN connection using non-contact wireless communication as a trigger may be used for some character strings. . For example, if the character in the previous part is shared and the second half is connected by wireless LAN from the menu operation, the value is random, and if the wireless LAN connection is triggered by non-contact wireless communication, a fixed value is used. As a result, the user can refer to the network of the same digital camera 100 regardless of which of the SSID used for wireless LAN connection from the menu operation and the SSID used for wireless LAN connection triggered by contactless wireless communication. Can be recognized. Further, for this common character string, for example, a value based on the GUID of the digital camera 100 may be used, or a value calculated from the MAC address assigned to the connection unit 111 may be used. That is, any value unique to each device may be used.

  The present invention supplies a program that realizes one or more functions of the above-described embodiments to a system or apparatus via a network or a storage medium, and one or more processors in a computer of the system or apparatus read and execute the program This process can be realized. It can also be realized by a circuit (for example, ASIC) that realizes one or more functions.

Claims (18)

First communication means for communicating with an external device via first wireless communication;
Second communication means for communicating with the external device via a second wireless communication different from the first wireless communication;
Receiving means for receiving an instruction to communicate with the external device by the first communication means;
Generating means for generating communication parameters of the first wireless communication;
When the second communication unit communicates with the external device, and when the first communication unit receives an instruction to communicate with the external device, the first communication unit controls to communicate with the external device. Control means to
The generation unit includes a calculation amount when generating a communication parameter used when communicating with the external device via the first wireless communication according to an instruction received by the reception unit, and the second communication. A communication device characterized in that the amount of calculation for generating communication parameters used when communicating with the external device via the first wireless communication differs according to communication with the external device by means . The communication parameter includes an encryption key;
The generation unit is configured to calculate the second amount more than a calculation amount when generating an encryption key used when communicating with the external device via the first wireless communication according to an instruction received by the reception unit. The amount of calculation when generating an encryption key used when communicating with the external device via the first wireless communication in response to communication with the external device by the communication means is reduced. The communication apparatus according to claim 1. The generation means generates the encryption key by repeating calculation based on a hash function for a predetermined character string,
The generation means repeats the calculation based on a hash function when generating an encryption key used when communicating with the external device via the first wireless communication according to the instruction received by the reception means Rather than based on a hash function when generating an encryption key used when communicating with the external device via the first wireless communication in response to communication with the external device by the second communication means The communication apparatus according to claim 2, wherein the number of calculation repetitions is reduced. The communication parameter includes a network identifier;
In response to communicating with the external device by the second communication means and the network identifier used when communicating with the external device via the first wireless communication according to the instruction received by the receiving means The communication apparatus according to claim 1, wherein the network identifier used when communicating with the external apparatus via the first wireless communication is made different. The communication parameter includes a network identifier;
In response to communicating with the external device by the second communication means and the network identifier used when communicating with the external device via the first wireless communication according to the instruction received by the receiving means The network identifier used when communicating with the external device via the first wireless communication is generated by a combination of a character string common to each other and a character string different from each other. 4. The communication device according to any one of items 1 to 3.   Among the different character strings, characters included in the network identifier used when communicating with the external device via the first wireless communication in response to communication with the external device by the second communication unit The communication apparatus according to claim 5, wherein the column is determined based on a MAC address.   The communication device according to claim 5, wherein the character strings common to each other are determined based on a UUID of the communication device.   The said 2nd communication means shares the communication parameter of 1st radio | wireless communication with the said external device via said 2nd radio | wireless communication, The any one of Claim 1 thru | or 7 characterized by the above-mentioned. Communication equipment.   The generation means is configured to establish communication via the first wireless communication using the shared communication parameter after the communication parameter is shared with the external device via the second wireless communication. The communication apparatus according to claim 8, wherein a new communication parameter is generated.   When communication with the external device is established via the first wireless communication, the control unit communicates with the other external device even if the second communication unit communicates with the other external device. The communication apparatus according to any one of claims 1 to 9, wherein control is performed so as not to communicate via the first wireless communication. The second wireless communication means includes an NFC tag,
After the communication parameter is shared with the external device via the second wireless communication, newly generated before establishing communication via the first wireless communication using the shared communication parameter The communication apparatus according to claim 10, wherein the transmitted communication parameter is written in a recording area of the NFC tag.   When communication with the external device is established via the first wireless communication, the control means displays information indicating that communication cannot be performed via the first wireless communication in the recording area of the NFC tag. The communication apparatus according to claim 11, wherein the communication apparatus is controlled to write.   8. The network according to claim 4, wherein the first communication unit generates a network using the first wireless communication by broadcasting a beacon including the network identifier. 9. Communication equipment. An image capturing unit that captures an image of the subject and generates image data;
The communication device according to claim 1, wherein the first communication unit transmits the image data to the external device via the first wireless communication.   The communication apparatus according to claim 14, wherein when the transmission of the image data is completed, the first wireless communication is disconnected.   Maintaining the first wireless communication with the external device when the second wireless communication with the external device is disconnected while the first wireless communication with the external device is established The communication apparatus according to claim 1, wherein: First communication means for communicating with an external device via first wireless communication, and second communication means for communicating with the external device via second wireless communication different from the first wireless communication A communication device control method comprising:
An accepting step of accepting an instruction to communicate with the external device by the first communication means;
Generating a communication parameter for the first wireless communication;
When the second communication unit communicates with the external device, and when the first communication unit receives an instruction to communicate with the external device, the first communication unit controls to communicate with the external device. And a control step to
In the generation step, a calculation amount when generating communication parameters used when communicating with the external device via the first wireless communication according to the instruction received in the reception step, and the second communication unit And a communication amount for generating communication parameters used when communicating with the external device via the first wireless communication according to communication with the external device. Control method.   A computer-readable program for causing a computer to function as the communication device according to any one of claims 1 to 16.

Images