JP2015170922A - Communication apparatus, control method of the same, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to participate in a network of high convenience while maintaining security.SOLUTION: The control method of the communication apparatus includes: sharing identification information with an external device through first communication; participating in a network utilizing second communication generated by another device; and switching whether to participate in another network on the basis of whether a signal containing the identification information is received from a device in a participated network.

Description

  The present invention relates to a communication device having a proximity wireless communication function.

  In recent years, communication is performed using a wireless LAN between a plurality of mobile devices such as smartphones, tablets, and digital cameras. When wireless communication is performed by a plurality of devices as described above, communication in an infrastructure mode in which communication of a plurality of clients (CL) is relayed by one access point (AP) is generally performed. When setting the infrastructure mode, it is necessary for the user to input the network SSID (Service Set Identifier) and password (hereinafter referred to as AP information) generated by the AP device to the CL device, which is troublesome. .

  On the other hand, for example, Patent Document 1 discloses a method for acquiring information for participating in a wireless network from one of a plurality of devices already participating in the wireless network via proximity wireless communication. Yes. Thereby, it is possible to save the user from inputting various parameters for participating in the wireless network, and to provide the user with a highly convenient method of participating in the wireless network.

JP2009-239573

  However, in the above-mentioned Patent Document 1, it is necessary for the CL device to transmit AP information of a device other than its own device by proximity wireless communication, which is not preferable in terms of security. On the other hand, if the AP information can be acquired only from the AP device, the security is maintained, but in order to participate in the network, it must be close to the AP device. Therefore, the user needs to be aware of which device is the AP device, and convenience is impaired. Therefore, an object of the present invention is to enable participation in a highly convenient network while maintaining security.

  In order to achieve the above object, the communication device of the present invention is different from the first communication generated by the sharing means for sharing the identification information with the external device via the first communication and the other device. A joining means for joining the network using the communication of 2; a judging means for judging whether or not a signal including the identification information is received from a device in the network joined by the joining means; and a result of the judging means And a control unit that switches whether to control the participation unit to participate in another network.

  According to the present invention, it is possible to participate in a highly convenient network while maintaining security.

(A) The block diagram of the digital camera in 1st Embodiment. (B), (c), (d) The figure which shows an example of the external appearance of the digital camera in 1st Embodiment. (A) The block diagram of the mobile telephone in 1st Embodiment. (B), (c), (d) The figure which shows an example of the external appearance of the mobile telephone in 1st Embodiment. (A), (b), (c), (d) The figure for demonstrating the aspect of the network in which the digital camera and mobile telephone in 1st Embodiment participate. (E) The figure which shows the list of the information of the network in 1st Embodiment. (A), (b) The conceptual diagram of the information of the connection history of the digital camera in 1st Embodiment. 5 is a flowchart illustrating the operation of the digital camera according to the first embodiment. FIG. 5 is a list of access point information collected by the digital camera according to the first embodiment. The flowchart which shows operation | movement of the mobile telephone in 1st Embodiment. 9 is a flowchart showing the operation of a digital camera according to the second embodiment. 6 is a flowchart showing the operation of a mobile phone according to the second 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>
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 apparatus may be an information processing apparatus such as 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 memory 102 is a rewritable recording medium, and is used as a buffer memory that temporarily stores data, an image display memory of the display unit 105, a work area of the control unit 101, and the like.

  The memory 102 includes, for example, a RAM (a volatile memory using a semiconductor element).

  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 nonvolatile memory 103 is composed of, for example, a flash memory or an EEPROM.

  The operation unit 104 is used for the user to accept an instruction for the digital camera 100 from the user. The operation unit 104 includes, for example, a power button for instructing the user to turn on / off the power of the digital camera 100, a release switch for instructing imaging, and a playback 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 wireless LAN connection unit 112 described later is included. A touch panel formed on the display unit 105 described later is also included in the operation unit 104. The release switch (not shown) has SW1 and SW2. When the release switch is in a so-called half-pressed state, SW1 is turned on. Thus, an instruction for preparing for still image capturing 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. Thereby, an instruction to take a still image is received.

  The display unit 105 displays a moving image on the viewfinder at the still image capturing preparation stage, displays captured still image data, displays characters for interactive operation, and the like. Note that the display unit 105 is not necessarily built in the digital camera 100. The digital camera 100 can be connected not only to the display unit 105 provided on the rear surface of the camera but also to a display unit 105 outside the camera, and it is only necessary to have at least a display control function for controlling the display of the display unit 105. .

  The recording medium I / F 106 is an interface for mounting a recording medium 107 such as a memory card. Based on the control of the control unit 101, data is read from the recording medium 107 mounted on the recording medium I / F 106 and data is written to the recording medium 107.

  The recording medium 107 is a rewritable nonvolatile memory for holding captured image data. For example, as the recording medium 107, an SD memory card or a compact flash (registered trademark) card can be used.

  The imaging unit 108 includes, for example, an optical lens unit, an optical system that controls 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. As the imaging device, a complementary metal oxide semiconductor (CMOS) or a charge coupled device image sensor (CCD) is generally used. The imaging unit 108 is controlled by the control unit 101 to convert subject light imaged by a lens included in the imaging unit 108 into an electrical signal by the imaging device, and perform noise reduction processing and the like to convert the digital data into an image. The data is output to the bus 113 as data.

  The image processing unit 109 performs various image processes on the image data stored in the nonvolatile memory 103 and the recording medium 107 and the video signal output from the imaging unit 108 based on the control of the control unit 101. Image processing performed by the image processing unit 109 includes A / D conversion processing, D / A conversion processing, image data encoding processing, compression processing, decoding processing, enlargement / reduction processing (resizing), noise reduction processing, and color conversion. Processing, face detection processing, and the like. The image processing unit 109 may be configured with a dedicated circuit block for performing specific image processing. Further, depending on the type of image processing, the control unit 101 can perform image processing according to a program without using the image processing unit 109. In the digital camera 100 of the present embodiment, the image data is recorded on the recording medium 107 in accordance with the DCF (Design rule for Camera File system) standard.

  The battery 110 is a unit for supplying power for operating the digital camera 100 to each unit. The battery 110 is a unit composed of a rechargeable secondary battery, and can be charged by an external battery charger (not shown).

  The proximity wireless communication unit 111 is a communication unit for realizing non-contact proximity communication with another device. The close proximity wireless communication unit 111 includes an antenna for wireless communication and a modulation / demodulation circuit and a communication controller for processing a wireless signal. The close proximity wireless communication unit 111 outputs non-contact close proximity communication by outputting a modulated wireless signal from an antenna and demodulating the wireless signal received by the antenna. Here, non-contact communication according to the ISO / IEC 18092 standard (so-called NFC: Near Field Communication) is realized. When the proximity wireless communication unit 111 receives a data read request from another device, it outputs response data based on the data stored in the nonvolatile memory 103. In the present embodiment, the proximity wireless communication unit 111 detects proximity / separation of the mobile phone 200 and detects signal strength information from the mobile phone 200 when the proximity wireless communication unit 111 approaches / separates from a proximity wireless communication unit 208 of the mobile phone 200 described later. Used for receiving.

  In the realization of close proximity wireless communication in the present embodiment, communication is started and connected by bringing close proximity wireless communication units of each device close to each other. In order to realize this close proximity wireless communication, it is not always necessary to bring close proximity wireless communication units into contact with each other. Since the close proximity wireless communication unit can communicate even if it is separated by a certain distance, the close proximity wireless communication may be brought close to a range where close proximity wireless communication is possible here. In the following description, it is referred to as “approach” to bring it close to the range where close proximity wireless communication is possible.

  Further, if the close proximity wireless communication units are in a range where close proximity wireless communication is not possible, communication is not started. Also, when each other's proximity wireless communication units are in a range where close proximity wireless communication is possible, and when the devices are connected for communication, the close proximity wireless communication units are separated to a range where close proximity wireless communication is not possible The communication connection is released. Note that non-contact proximity communication realized by the proximity wireless communication unit 111 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 proximity wireless communication unit 111.

  The wireless LAN connection unit 112 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 wireless LAN connection unit 112. In the present embodiment, the wireless LAN connection unit 112 is an interface for communicating with an external device via a so-called wireless LAN according to the IEEE 802.11 standard. The control unit 101 realizes wireless communication with an external device by controlling the wireless LAN connection unit 112. Although the communication method is not limited to the wireless LAN, it is assumed that a communication method in which at least the communicable distance is longer than that of the close proximity wireless communication unit 111 is adopted.

  The system bus 113 is a bus that connects each part of the digital camera 100. Each unit connected to the system bus 113 can exchange data with each other via the system bus 113.

  Next, the appearance of the digital camera 100 will be described.

  1B, 1C, and 1D are a front view, a rear view, and a bottom view of the digital camera 100, respectively.

  A release switch 1041 in FIG. 1B is an operation member included in the operation unit 104 in FIG. Note that in this embodiment, when the release switch 1041 is fully pressed at the time of capturing moving image data, the capturing of moving image data ends.

  The finder window 1082 in FIG. 1B can confirm a subject image from a finder eyepiece 1084 described later when determining a composition at the time of imaging.

  The strobe 1083 in FIG. 1B emits light as necessary during imaging.

  An imaging lens 1081 in FIG. 1B is an imaging member included in the imaging unit 108.

  A viewfinder eyepiece 1084 in FIG. 1C is a viewing window for the user to optically check the subject image.

  A power button 1042 in FIG. 1C is a button for turning on / off the power of the digital camera 100.

  An operation member group 1043 in FIG. 1C is a button group constituting the operation unit 104. The user can use these buttons to display the menu of the digital camera 100 and set various parameters.

  The display unit 105 in FIG. 1C is an LCD that is used for an imaging range (composition determination), displays an operation menu, and reproduces and displays captured video data before imaging starts. . In addition, the same number is attached | subjected to this member as Fig.1 (a).

  An area 1111 is an area for performing close proximity wireless communication. That is, the antenna of the close proximity wireless transfer unit 111 is arranged in this part. When the antenna of the proximity-less communication unit 208 of the mobile phone 200 approaches this area, communication between the proximity wireless communication unit 111 and the proximity wireless communication unit 208 becomes possible.

  A screw hole 1102 is a screw hole for fixing the tripod.

  The battery chamber 1101 is an area for storing a battery. The user can install the battery 110 and the recording medium 107 therein.

  The above is the description of the digital camera 100.

<Configuration of mobile phone>
Next, the mobile phone 200 will be described.

  FIG. 2A is a block diagram illustrating a configuration example of the mobile phone 200 that is an example of the information processing apparatus according to the present embodiment. In addition, although a smart phone is described here as an example of an information processing apparatus, an information processing apparatus is not restricted to this. For example, the information processing apparatus may be a portable media player, a so-called tablet device, a personal computer, or the like. Moreover, an imaging apparatus such as a digital camera 100 having a communication function may be used.

  The control unit 201 controls each unit of the mobile phone 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 memory 202 is a rewritable recording medium, and is used as a buffer memory that temporarily stores data, an image display memory of the display unit 204, a work area of the control unit 201, and the like.

  The memory 202 is composed of, for example, a RAM (volatile memory using a semiconductor element).

  The non-volatile memory 203 is an electrically erasable / recordable non-volatile memory, and stores a program to be described later executed by the control unit 201. The nonvolatile memory 103 is composed of, for example, a flash memory or an EEPROM.

  The display unit 204 displays a viewfinder image at the time of imaging, displays captured image data, and displays characters for interactive operation. Note that the display unit 204 is not necessarily built in the mobile phone 200. The mobile phone 200 can be connected not only to the display unit 204 provided on the back surface of the mobile phone 200 but also to a display unit 204 outside the mobile phone 200, and has at least a display control function for controlling the display of the display unit 204. It only has to be.

  The operation unit 205 is used for the user to accept an instruction for the mobile phone 200 from the user. The operation unit 205 includes, for example, a power button for instructing the user to turn on / off the mobile phone 200, a release switch for instructing imaging, and a playback 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 wireless LAN connection unit 212 described later is included. The operation unit 205 also includes a touch panel formed on the display unit 204.

  The battery 206 is a unit for supplying power for operating the mobile phone 200 to each unit. The battery 206 is a unit composed of a rechargeable secondary battery, and can be charged by an external battery charger (not shown).

  Proximity wireless communication unit 208 is a communication unit for realizing non-contact proximity communication with other devices. The close proximity wireless communication unit 208 includes an antenna for wireless communication and a modulation / demodulation circuit and a communication controller for processing wireless signals. The close proximity wireless communication unit 208 outputs non-contact close proximity communication by outputting a modulated wireless signal from an antenna and demodulating the wireless signal received by the antenna. Here, non-contact communication according to the ISO / IEC 18092 standard is realized. When the close proximity wireless transfer unit 111 receives a data read request from another device, the close proximity wireless transfer unit 111 outputs response data based on the data stored in the nonvolatile memory 203. In the present embodiment, the proximity wireless communication unit 208 detects the proximity / separation of the digital camera 100 and the signal strength information from the mobile phone 200 when the proximity wireless communication unit 208 approaches / separates from the proximity wireless communication unit 111 of the digital camera 100 described above. Used for receiving. The contactless proximity communication realized by the proximity wireless communication unit 208 is not limited to NFC, and other wireless communication may be employed. For example, as the non-contact proximity communication realized by the proximity wireless communication unit 208, non-contact proximity communication according to the ISO / IEC 14443 standard may be employed.

  The wireless LAN connection unit 209 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 wireless LAN connection unit 209. In the present embodiment, the wireless LAN connection unit 209 is 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 wireless LAN connection unit 209. Although the communication method is not limited to the wireless LAN, it is assumed that a communication method in which at least a communicable distance is longer than that of the close proximity wireless communication unit 208 is adopted.

  The 3G communication unit 207 is a unit for realizing voice communication and data communication between the mobile phone and a mobile communication network (not shown). The 3G communication unit 207 includes an antenna for performing wireless communication and a communication controller for processing wireless signals, and implements wireless communication according to, for example, W-CDMA (UMTS).

  The system bus 210 is a bus that connects each part of the mobile phone 200. Each unit connected to the system bus 210 can exchange data with each other via the system bus 210.

  Next, the appearance of the mobile phone 200 will be described.

  2B, 2C, and 2D are a front view, a rear view, and a bottom view of the mobile phone 200, respectively.

  The liquid crystal display 204 with a touch panel is an example of the display unit 204. In addition, the same number is attached | subjected here as the member similar to FIG. The touch panel unit configures the operation unit 205, and the liquid crystal display unit configures the display unit 204. The user can operate the GUI displayed on the liquid crystal display 204 with a touch panel by using the touch panel unit.

  The operation button 2051 constitutes the operation unit 205. By using these buttons, the user can switch the function of the mobile phone 200 or operate the GUI displayed on the display unit 204.

  The volume button 2503 constitutes the operation unit 205. By using these buttons, the user can control the volume at the time of voice communication or playing back recorded voice data, music data, moving picture data, and the like.

  The power button 2502 constitutes the operation unit 205. The user can perform operations such as power ON / OFF of the mobile phone 200 by using this button.

  An area 2081 is an area for performing close proximity wireless communication. That is, the antenna of the close proximity wireless transfer unit 208 is arranged in this part. When the antenna of the close proximity wireless communication unit 111 of the digital camera 100 is close to this area, communication between the close proximity wireless communication unit 208 and the close proximity wireless communication unit 111 becomes possible.

  The above is the description of the mobile phone 200.

<System overview>
FIGS. 3A, 3B, 3C, and 3D are diagrams showing a schematic configuration of a communication system according to the present embodiment.

  In FIG. 3A, the mobile phone 200 is connected to the access point 303. In other words, the mobile phone 200 participates in the network generated by the access point 303. On the other hand, the digital camera 100 is not connected to any access point. Therefore, in this network configuration, the digital camera 100 and the mobile phone 200 cannot communicate with each other using a wireless LAN.

  In FIG. 3B, the digital camera 100 is connected to the access point 301. On the other hand, the mobile phone 200 is connected to the access point 303. Since the digital camera 100 and the mobile phone 200 are connected to different access points, this network configuration cannot communicate with each other using a wireless LAN.

  In FIG. 3C, the digital camera 100 is connected to the access point 302. On the other hand, the mobile phone 200 is connected to the access point 303. Since the digital camera 100 and the mobile phone 200 are connected to different access points, this network configuration cannot communicate with each other using a wireless LAN, as in FIG.

  In FIG. 3D, the digital camera 100 is connected to the access point 303. On the other hand, the mobile phone 200 is also connected to the access point 303. That is, the digital camera 100 and the mobile phone 200 are connected to the same access point (that is, participate in the same network). Therefore, in this network configuration, the digital camera 100 and the mobile phone 200 can communicate with each other using a wireless LAN.

  FIG. 3E shows a list of network parameters generated by each wireless LAN access point. Information shown in the item of SSID (Service Set Identifier) is network identification information generated by each wireless LAN access point. The information shown in the security item indicates a security method used in the network generated by each wireless LAN access point.

  In addition, the digital camera 100 of the present embodiment holds information on networks that have participated in the past, information on mobile phones that have established communications in the past, and the like as connection history information.

  FIG. 4 is a diagram schematically showing connection history information stored in the nonvolatile memory 103 of the digital camera 100.

  Among the items, SSID is identification information of a network that has been connected. Security is a security method used in networks that have been connected. The passphrase is a character string of a password used in a network that has been connected. The pairing information is identification information of a device that has established communication through a network that has been connected. In the present embodiment, in this embodiment, it is assumed that each device itself holds a UUID (Universally Unique Identifier), which is identification information uniquely determined for each device.

  A history 401 indicates that the digital camera 100 has been connected to a wireless LAN access point whose SSID is “ABCD”. In addition, it shows that the wireless LAN communication has been successfully established (so-called pairing) with a device having UUID {66666666-7777-8888-9999-AAAAAAAAAAAA} when connected to this wireless LAN access point.

  A history 402 and a history 403 indicate that the digital camera 100 has been connected to wireless LAN access points with SSIDs “EFGH” and “MNOP”, respectively. In addition, there is no item of pairing information, which indicates that pairing with another device was not performed when connected to these wireless LAN access points.

  The history 404 indicates that the digital camera 100 has connected to the access point with the SSID “VWXY” and has successfully paired with a device having the UUID {11111111-2222-3333-4444-555555555555}.

  The history information is used, for example, to omit a part of the operation in the digital camera 100 when connecting to the same mobile phone again. That is, for example, a list of the history information is displayed on the menu of the communication function, and when the user selects the history via the operation unit, the access point network corresponding to the selected history is searched and joined. Execute the process. Thereafter, a mobile phone corresponding to the selected history is searched from the network, and processing for establishing communication is executed. Accordingly, for example, communication with a desired device can be established without requiring an input operation of parameters for the user to participate in the network. In this case, it is assumed that the mobile phone corresponding to the history participates in the network corresponding to the history. If the mobile phone corresponding to the history does not participate in the network corresponding to the history, communication cannot be established as it is.

  Moreover, even if this history has the same SSID, for example, if the UUID of the corresponding pairing information is different, the set is held as another history.

  Similarly, even if the UUIDs recorded in the pairing information are the same, if the corresponding SSIDs are different, they are stored as different histories.

  As described above, in order for the digital camera 100 to establish communication with the mobile phone 200, it is necessary to participate in the same network. Therefore, whether it is a method of using a history or a method of newly joining a network and searching for a communication partner, it is possible to know information on the network in which the communication partner is participating and to perform an operation to join the network. is necessary.

  Therefore, in this embodiment, the digital camera 100 that has received the information of the mobile phone 200 using NFC sequentially participates in the network generated by the surrounding access points, and is automatically sent from the devices in the network to the mobile phone. I tried to find 200. As a result, the user simply connects the digital camera 100 and the mobile phone 200 close to each other, and the digital camera 100 and the mobile phone 200 can be connected without leaking information on the access point to which the mobile phone 200 is participating. can do. Hereinafter, operations of the digital camera 100 and the mobile phone 200 in the present embodiment for realizing this will be described.

<Description of operation: Digital camera>
FIG. 5 is a flowchart illustrating the operation of the digital camera 100 when establishing communication using a wireless LAN by the digital camera 100 according to the present embodiment communicating with the mobile phone 200 via NFC. The processing of this flowchart is realized by the control unit 101 reading out a program recorded in the nonvolatile memory 103 and developing and executing the program in the memory 102. Further, the processing of this flowchart is started in response to, for example, the power supply of the digital camera 100 being turned on.

  First, in step S <b> 501, the control unit 101 confirms the state of the proximity wireless communication unit 111 and determines whether the proximity wireless communication unit 111 can communicate with the proximity wireless communication unit 208 of the mobile phone 200. Specifically, the close proximity wireless communication unit 111 can communicate when the close proximity wireless communication area 1111 of the digital camera 100 and the close proximity wireless communication area 2081 of the mobile phone 200 are sufficiently close. If the control unit 101 determines that communication is not possible, the process of this step is repeated, and the proximity of the close proximity wireless communication area 1111 of the mobile phone 200 is awaited. On the other hand, if the control unit 101 determines that communication is possible, the process proceeds to step S502.

  In step S <b> 502, the control unit 101 shares the identification information of the mobile phone 200 via the proximity wireless communication unit 111. Specifically, the mobile phone 200 and the digital camera 100 share the UUID of the mobile phone 200 by receiving the UUID held by the mobile phone 200 from the mobile phone 200 via proximity wireless communication. . Here, the following processing will be described assuming that UUID {BBBBBBBBB-CCCC-DDDD-EEEE-FFFFFFFFFFFF} is acquired as identification information.

  In step S502, as long as the identification information of the mobile phone 200 can be shared via the proximity wireless communication unit 111, either of the proximity wireless communication units may be the main body. For example, a format in which the close proximity wireless communication unit 111 serves as an NFC reader and reads data from the close proximity wireless communication unit 208, and a format in which the close proximity wireless communication unit 208 serves as an NFC writer and writes data to the close proximity wireless communication unit 111 can be considered. Further, the proximity wireless communication unit 111 and the proximity wireless communication unit 208 may operate in the NFC P2P mode, and data including identification information may be transmitted from the proximity wireless communication unit 208 to the proximity wireless communication unit 111.

  In step S503, the control unit 101 collects surrounding wireless LAN access point information (so-called scan) via the wireless LAN connection unit 112. Specifically, by receiving a beacon periodically transmitted by the wireless LAN access point, network information generated by the wireless LAN access point transmitting the beacon is collected.

  FIG. 6 is a diagram schematically showing an example of information on surrounding wireless LAN access points collected in step S503. The collected information includes the SSID, security method, signal strength, etc. of each wireless LAN access point. Information 601 corresponds to the wireless LAN access point 301, information 602 corresponds to the wireless LAN access point 302, and information 603 corresponds to the wireless LAN access point 303.

  Returning to the description of FIG.

  Steps S504 to S517 are processes for selecting any of the connectable peripheral wireless LAN access points and joining the network generated by the selected wireless LAN access point. In the digital camera 100 according to the present embodiment, the wireless LAN access point used when paired with the mobile phone in the past, the wireless LAN access point with connection experience in the past, and the open wireless LAN access point are preferentially selected.

  In step S504, the control unit 101 determines whether there is a connectable wireless LAN access point from the information acquired in step S503 and the history information stored in the nonvolatile memory 103 ((a) in FIG. 4). Determine. Specifically, the control unit 101 determines that there is a connectable wireless LAN access point when there is a connection history including the same SSID as the SSID acquired in step S503. In addition, even when the wireless LAN access point without security (open access point) is included in the wireless LAN access point information acquired in step S603, it is determined that there is a connectable wireless LAN access point in the vicinity.

  If it is determined that there is a connectable wireless LAN access point, the process proceeds to step S505. If it is determined that there is no wireless LAN access point, the process proceeds to step S523.

  Steps S <b> 505 to S <b> 516 are processes for selecting a wireless LAN access point to which the digital camera 100 tries to connect for pairing with the mobile phone 200.

  Steps S <b> 505 to S <b> 508 are processes for selecting the wireless LAN access point used when pairing with the mobile phone was successful in the past, using the connection history information in the nonvolatile memory 103.

  In step S505, the control unit 101 refers to the connection history in FIG. 4A, and the wireless LAN access point used when pairing with the mobile phone specified by the identification information acquired in step S502 is successful. Is included in the connection history.

  Specifically, the same value as the identification information acquired in step S502 exists in the “pairing history” column of the connection history, and the SSID corresponding to the value is included in the access point information collected in step S503. It is determined whether or not. When the same value as the identification information acquired in step S502 exists and the SSID corresponding to the value is included in the access point information collected in step S503, the wireless used when pairing with the mobile phone is successful It is determined that there is a LAN access point.

  For example, assume that UUID {11111111-7777-8888-9999-AAAAAAAAAAAAA} is acquired as identification information in step S502. In this case, the UUID is included in the pairing history column of FIG. 4A, but the corresponding SSID VWXY is not included in the collected access point information of FIG. Therefore, it is determined that there is no wireless LAN access point used when pairing with the mobile phone is successful. On the other hand, for example, assume that UUID {66666666-7777-8888-AAAAAAAAAAAAA} is acquired as identification information in step S502. In this case, this UUID is included in the pairing history of FIG. 4A (history 401), and the corresponding SSID (ABCD) is included in the access point information of FIG. 6 (information 601). For this reason, it is determined that the wireless LAN access point used when pairing with the mobile phone is successful exists in the vicinity. Also assume that UUID {BBBBBBBBB-CCCC-DDDD-EEEE-FFFFFFFFFFFF} is acquired as identification information in step S502. In this case, this UUID is not included in the pairing history column of FIG. Therefore, it is determined that there is no wireless LAN access point used when pairing with the mobile phone is successful.

  In step S505, if the control unit 101 determines that the wireless LAN access point used when pairing with the mobile phone is successful is present in the surroundings, the process proceeds to step S506. If it is determined that there is no wireless LAN access point, the process proceeds to step S509. move on.

  In step S506, the control unit 101 has a wireless LAN access point that has not yet been attempted to connect in the process of this flowchart among wireless LAN access points used when pairing with a mobile phone existing in the vicinity is successful. It is determined whether or not.

  If there is a wireless LAN access point that has not yet attempted to connect, the process proceeds to step S507, and if not, the process proceeds to step S509. This process is necessary for holding the same mobile phone as a communication partner (that is, even if the UUID of the pairing information is the same) and holding it as another history if the SSID is different. That is, even if the mobile phone is the same, there may be a case where it is paired via an access point at home and a case where it is paired via another access point.

  In step S507, the control unit 101 selects any one of wireless LAN access points that have been used when past pairing has been successful and have not yet attempted connection in the process of this flowchart. To do. At this time, when NFC communication is further established in step S502, the strength of the beacon transmitted from the access point to which the mobile phone is connected to the mobile phone 200 is received from the mobile phone 200, and the line LAN access point is selected. It may be used as a reference when doing so. That is, an access point whose signal strength from the access point when information is collected in step S503 is close to the beacon strength received in step S502 may be preferentially selected. This is because the distance from the access point is substantially the same between the digital camera 100 and the mobile phone 200 at the timing of NFC communication, and as a result, the intensities of the beacons transmitted from the access point are approximately the same. This is because the possibility is high.

  In step S508, the control unit 101 refers to a connection history ((a) in FIG. 4) for communication parameters (SSID, security method, passphrase) for connecting to the wireless LAN access point selected in step S507. decide. Thereafter, the process proceeds to step S517. The processing after step S517 will be described later. First, the processing after step S509 will be described.

  Steps S509 to S512 are the wireless LAN access points that have been connected in the past using the connection history information of the non-volatile memory 103 when there is no wireless LAN access point used when pairing was successful in the past. Is a process for selecting.

  In step S509, the control unit 101 determines whether there is a wireless LAN access point that has been connected in the past among the connectable wireless LAN access points acquired in step 603.

  Specifically, among the wireless LAN access point information collected in step S503, when information related to the wireless LAN access point with the same SSID is recorded in the connection history, the wireless LAN access point that has been connected in the past is displayed. Judge that there is.

  For example, regarding information 601 and information 602 in FIG. 6, since the same SSID exists as history 401 and history 402 in FIG. 4A, it is determined in step S509 that there is a wireless LAN access point that has been connected in the past. Will do.

  If it is determined that there is a wireless LAN access point that has been connected in the past, the process proceeds to step S510. If it is determined that there is no wireless LAN access point, the process proceeds to step 513.

  In step S510, the control unit 101 determines whether there is a wireless LAN access point that has not yet been attempted to connect in the process of this flowchart among the wireless LAN access points that existed in the past and have been connected in the past. .

  If it is determined that there is a wireless LAN access point that has not yet been connected, the process proceeds to step S611. If it is determined that there is no wireless LAN access point, the process proceeds to step S613.

  In step S611, the control unit 101 selects any one of wireless LAN access points that have been connected in the past and have not attempted connection in the process of this flowchart. At this time, similarly to step S507, the selection may be made in the priority order based on the beacon strength and the signal strength.

  In step S512, the control unit 101 refers to the connection history ((a) of FIG. 5) for communication parameters (SSID, security method, passphrase) for connecting to the wireless LAN access point selected in step S511. decide. Thereafter, the process proceeds to step S517. The processing after step S517 will be described later. First, the processing after step S513 will be described.

  In step S513, the control unit 101 determines whether there is an open wireless LAN access point among the connectable wireless LAN access points acquired in step S507.

  Specifically, it is determined that there is an open wireless LAN access point when there is an SSID with security “None” in the wireless LAN access point information collected in step S503.

  For example, among the wireless LAN access point information collected in step S503, the information 602 and the information 603 in FIG. 6 are determined to have an open wireless LAN access point because the security is “none”.

  If it is determined that there is an open wireless LAN access point that can be connected, the process proceeds to step S514. If it is determined that there is no open wireless LAN access point, the process proceeds to step 523.

  In step S514, the control unit 101 determines whether there is a wireless LAN access point that has not yet been attempted to connect in the process of this flowchart among the open wireless LAN access points that can be connected in the vicinity.

  If it is determined that there is a wireless LAN access point that has not yet been connected, the process proceeds to step S515. If it is determined that there is no wireless LAN access point, the process proceeds to step S523.

  In step S515, the control unit 101 selects any one of wireless LAN access points that are not trying to connect (open wireless LAN access points that can be connected). At this time, similarly to step S507, the selection may be made in the priority order based on the beacon strength and the signal strength.

  In step S516, the control unit 101 determines communication parameters for connecting to the wireless LAN access point selected in step S511. Since the selected wireless LAN access point is open, the only communication parameter required for connection is SSID. Thereafter, the process proceeds to step S517.

  Steps S517 to S519 are processes for determining whether or not communication with the mobile phone 200 is possible using the wireless LAN connection unit 112 via the wireless LAN access point selected in the processes of steps S505 to S516.

  In step S517, the control unit 101 joins the network generated by the wireless LAN access point using the communication parameter determined in any of steps S508, S512, and S516. Specifically, the control unit 101 receives a beacon periodically transmitted from the wireless LAN access point via the wireless LAN connection unit 112, and connects to the wireless LAN access point through a response and a connection process. To join the network. Alternatively, a probe signal is transmitted to the wireless LAN access point and connected to the wireless LAN access point through a predetermined connection sequence, thereby joining the network generated by the wireless LAN access point.

  For example, if a wireless LAN access point with SSID “ABCD” (history 401 in FIG. 4A) is selected in step S511, the digital camera 100 is connected to the wireless LAN access point 301 (FIG. 3). (B)).

  For example, if a wireless LAN access point (information 603 in FIG. 6) with an SSID of “IJKL” is selected in step S515, the digital camera 100 is connected to the wireless LAN access point 303 (FIG. 4 (( d)).

  In step S518, the control unit 101 uses the identification information acquired in step S502 to search for a device having the identification information on the currently connected wireless LAN using the wireless LAN connection unit 112 (so-called discovery). To do. Specifically, when the identification information is UUID, the control unit 101 transmits an SSDP M-Search command as a search signal to all devices in the participating network. If the device in the network receives this M-Search and is compatible, it transmits a response signal to the M-Search transmission source (that is, the digital camera 100). This response signal includes a UUID. Therefore, whether or not there is a device having the UUID in the currently participating wireless LAN by referring to whether or not this response includes a UUID that matches the identification information (UUID) acquired in step S502. Can be judged.

  When a host name is used as identification information, the control unit 101 searches for a communication device on the network having the host name using the mDNS protocol (name resolution request). If there is a response to the name resolution request, it is understood that there is a communication device having the host name on the currently connected wireless LAN.

  In step S519, the control unit 101 determines whether the search performed in step S518 has been successful. Here, if a response signal including a UUID that matches the identification information acquired in step S502 can be received, it is determined that the search has been successful. If it is determined that the search has failed, the process proceeds to step 520. If it is determined that the search has been successful, the process proceeds to step S521.

  In step S520, the control unit 101 leaves the wireless LAN that participated in step S517, and returns to step S505 to select the next wireless LAN access point. This is due to a prediction that the mobile phone specified by the UUID received via NFC in step S502 will participate in the network of another wireless LAN access point. That is, by repeating the processes in steps S505 to S520, the digital camera 100 sequentially participates in the network generated by the surrounding access points, and searches for the mobile phone 200 from the devices in the joined network. As a result, communication with the mobile phone 200 can be established as a result.

  On the other hand, in step S521 where the search for the mobile phone 200 is successful and the transition is made, the control unit 101 uses the wireless LAN connection established in step S517 to notify the mobile phone 200 that the pairing has been successful. . For example, a message indicating that the pairing is successful is transmitted to the mobile phone 200 using the wireless LAN connection unit 112.

  In subsequent step S522, the control unit 101 adds communication parameters (SSID, security method, passphrase) and pairing information for the currently used wireless LAN connection to the connection history information of the nonvolatile memory 103. In addition, the control unit 101 displays a message indicating that the pairing has been successful on the display unit 105. Then, this flowchart is complete | finished.

  For example, if a wireless LAN access point (information 603 in FIG. 6) with an SSID of “HIJK” is selected in step S515, the digital camera 100 and the mobile phone 200 are connected to the wireless LAN access point 301 together. Become. That is, YES is determined in the step S519. In this case, the connection history information in FIG. 4A is updated as shown in FIG. 4B (the history 405 is added).

  On the other hand, step S523 is processing when the UUDI of the mobile phone 200 is not found even though the network of all the wireless LAN access points to which the digital camera 100 can be connected is searched. That is, it is a process in a case where communication with the mobile phone 200 is not possible (pairing has failed).

  In step S523, the control unit 101 displays an error message indicating that the pairing has failed on the display unit 105, and ends this flowchart.

  The above is the operation of the digital camera 100 in the present embodiment.

<Operation description: Mobile phone>
Next, the operation of the mobile phone 200 corresponding to the operation of the digital camera 100 described above will be described.

  FIG. 7 is a flowchart showing the operation of the mobile phone 200 when the digital camera 100 establishes communication using the wireless LAN by communicating with the mobile phone 200 via NFC. The processing of this flowchart is realized by the control unit 201 reading out a program recorded in the nonvolatile memory 203 and developing and executing the program in the memory 202. Further, the processing of this flowchart is started in response to, for example, the power supply of the mobile phone 200 being turned on.

  First, in step S <b> 701, the control unit 201 confirms the state of the proximity wireless communication unit 208 and determines whether the proximity wireless communication unit 208 can communicate with the proximity wireless communication unit 111 of the digital camera 100. Specifically, the close proximity wireless communication unit 208 can communicate when the close proximity wireless communication area 1111 of the digital camera 100 and the close proximity wireless communication area 2081 of the mobile phone 200 are sufficiently close.

  If the control unit 201 determines that communication is impossible, the process of this step is repeated and the proximity of the digital camera is awaited. On the other hand, if it is determined that communication is possible, the process proceeds to step S702.

  In step S <b> 702, the control unit 201 transmits identification information of the mobile phone 200 to the digital camera 100 via the proximity wireless communication unit 208. Here, the following processing will be described assuming that UUID {BBBBBBBBB-CCCC-DDDD-EEEE-FFFFFFFFFFFF} is transmitted as identification information.

  Note that the proximity wireless communication performed in step S702 may be realized by the proximity wireless communication unit 111 of the digital camera 100 becoming an NFC reader, or the proximity part line communication unit 208 of the mobile phone 200 becoming an NFC writer. It may be realized. When the proximity wireless communication unit 111 of the digital camera 100 is an NFC reader, the control unit 101 reads data including identification information from the proximity line communication unit 208 of the mobile phone 200 via the proximity wireless communication unit 111. When the close proximity wireless communication unit 208 is an NFC writer, the control unit 201 writes data including identification information to the close proximity wireless communication unit 111 via the close proximity wireless communication unit 208. Further, a format in which the proximity wireless communication unit 111 and the proximity wireless communication unit 208 operate in the NFC P2P mode and data including identification information is transmitted from the proximity wireless communication unit 208 to the proximity wireless communication unit 111 may be adopted.

  In step S703, the control unit 201 monitors data received by the wireless LAN connection unit 209, and determines whether or not device detection (so-called discovery) on the network is performed. Specifically, when an SSDP M-Search command is received or when an mDNS protocol name resolution request is received, it is determined that device detection is being performed.

  If it is determined in step S703 that device detection is performed, the process proceeds to step S704. If it is determined that device detection is not performed, the process proceeds to step S705.

  In step S704, the control unit 201 determines whether it is necessary to respond to device detection based on the data received in step S703.

  Specifically, if the device detection data received in step S703 is an SSDP M-Search command, it is determined that a response is required. If the name resolution request is for the mDNS protocol, it is determined that a response is required when the name resolution request is for the host name of the mobile phone 200.

  If it is determined that there is no need to respond, the process proceeds to step S705.

  In step S705, the control unit 201 determines whether or not a predetermined time (for example, 90 seconds) has elapsed since data reception by NFC in step S702.

  If it is determined that the predetermined time has elapsed, the process returns to step S701 to wait for the next approach of the digital camera 100. On the other hand, if it is determined that it has not elapsed, the process returns to step S703 to wait for the next device detection.

  On the other hand, if it is determined in step S704 that it is necessary to respond, the process proceeds to step S706.

  In step S706, the control unit 201 responds to the device detection received in step S703. Here, for example, for the M-Search command of the SSDP protocol, the response signal includes its own identification information (UUID {BBBBBBBB-CCCC-DDDD-EEEE-FFFFFFFFFFFF}). If the data received in step S703 is an mDNS protocol name resolution request, the response including the IP address of the mobile phone 200 is made.

  In step S <b> 707, the control unit 201 uses the wireless LAN connection unit 209 to wait for a notification from the digital camera 100 that pairing has been successful.

  If a pairing completion notification has been received (YES in step S707), the process proceeds to step S708. If not received (NO in step S707), the process proceeds to step S709.

  In step S708, the control unit 201 displays on the display unit 204 that pairing has been successful, and then returns to step S701 to wait for the next NFC touch.

  On the other hand, in step S709, the control unit 201 determines whether or not a predetermined time (eg, 90 seconds) has elapsed since the response to device detection in step S706. If it is determined that the predetermined time has elapsed, the process returns to step S801 to wait for the next approach of the digital camera 100. If it is determined that it has not elapsed, the process returns to step S807 to wait for a pairing reception notification.

  The above is the description of the operation of the mobile phone 200 corresponding to the operation of the digital camera 100 described above.

  As described above, the digital camera of this embodiment searches for the mobile phone 200 from the network by sequentially switching the network of access points. As a result, communication between the digital camera and the mobile phone can be established without exchanging information on the access point. After the communication via the wireless LAN is thus established, the image data generated by the digital camera is transmitted to the mobile phone or the image data generated by the mobile phone is transmitted to the digital camera using the wireless LAN. Or send.

[Second Embodiment]
In the first embodiment, the case where the digital camera 100 participates in a network generated by a surrounding access point and performs discovery for searching for the mobile phone 200 has been described as an example. On the other hand, in this embodiment, a case where the digital camera 100 participates in a network generated by surrounding access points and detects whether there is a discovery from the mobile phone 200 will be described. Since this embodiment has many parts in common with the first embodiment, the description will focus on the parts specific to this embodiment.

<Description of operation: Digital camera>
FIG. 8 is a flowchart showing an operation of the digital camera 100 when establishing communication using a wireless LAN by the digital camera 100 according to the present embodiment communicating with the mobile phone 200 via NFC. The processing of this flowchart is realized by the control unit 101 reading out a program recorded in the nonvolatile memory 103 and developing and executing the program in the memory 102. Further, the processing of this flowchart is started in response to, for example, the power supply of the digital camera 100 being turned on.

  First, in step S801, surrounding wireless LAN access point information is collected (so-called scanning) via the wireless LAN connection unit 112. The processing in this step is the same as that in step S503 in FIG. That is, here, information as shown in FIG. 6 is collected.

  Subsequently, in step S <b> 802, the control unit 101 confirms the state of the proximity wireless communication unit 111 and determines whether the proximity wireless communication unit 111 can communicate with the proximity wireless communication unit 208 of the mobile phone 200. The processing in this step is the same as that in step S501 in FIG. If the control unit 101 determines that communication is impossible, the process returns to step S801, and waits for the proximity of the close proximity wireless communication area 2081 of the mobile phone 200 while repeating the processes of steps S801 and S802. On the other hand, if the control unit 101 determines that communication is possible, the process proceeds to step S803.

  In step S <b> 803, the control unit 101 notifies the mobile phone 200 of its own identification information, a detection period after wireless LAN connection, and the number of surrounding wireless LAN access points, via the proximity wireless communication unit 111. As a result, the mobile phone 200 performs discovery of the digital camera 100 using these pieces of information. However, this discovery signal cannot be received by the digital camera 100 unless it participates in the same network as the mobile phone 200. Therefore, in the migration process, the digital camera 100 sequentially participates in a network generated by surrounding access points, and searches for a network that can receive discovery from the mobile phone 200. Here, the following processing will be described by taking as an example a case where UUID {22222222-3333-4444-5555-666666666666} is notified as identification information, 15 seconds is detected as a detection period, and 3 is reported as the number of wireless LAN access points.

  In subsequent steps S804 to S817, processing similar to that in steps S504 to S517 in FIG. 5 is executed. However, if NO in step S804, step S813, and step S814, the process proceeds to step S825.

  When the connection to the wireless LAN access point is completed using the wireless LAN connection unit 112 in step S807, the process proceeds to step S818.

  In step S818, the control unit 101 monitors data received via the wireless LAN connection unit 112, and determines whether device detection (discovery) on the network with respect to the digital camera 100 is performed. Specifically, when an SSDP M-Search command specifying the UUID notified to the mobile phone 200 in step S803 is received, it is determined that device detection has been performed. If a host name is used as the identification information to be notified to the mobile phone 200 in step S803, it is determined that device detection has been performed for itself when an mDNS protocol name resolution request for the host name is received. May be.

  If it is determined in step S818 that device detection has been performed on itself, the process proceeds to step S821. If it is determined that detection has not been performed, the process proceeds to step S819.

  In step S819, the control unit 101 determines whether the elapsed time after connecting to the wireless LAN access point in step S817 has exceeded the detection time notified in step S803. If the detection time has been exceeded, the process proceeds to step S820. If not, the process returns to step S818 to confirm again whether or not there is a detection process for itself.

  In step S820, the control unit 101 disconnects the wireless LAN connection established in step S817, and returns to step S805 to select the next wireless LAN access point.

  On the other hand, in step S821, the control unit 101 responds to the device detection received in step S819. In this case, for example, the identification signal (UUID {222222222-3333-4444-5555-666666666666}) is included in the response signal to the M-Search command of the SSDP protocol. If the data received in step S819 is an mDNS protocol name resolution request, it responds including its own IP address.

  In step S <b> 822, the control unit 101 waits for reception of a pairing success message transmitted from the mobile phone 200 via the wireless LAN connection unit 112. If a pairing completion notification is received, the process proceeds to step S823. If not received, the process proceeds to step S824.

  In step S823, the control unit 101 adds communication parameters (SSID, security method, passphrase) and pairing information for the currently used wireless LAN connection to the connection history information of the nonvolatile memory 103. Further, the control unit 101 displays on the display unit 105 that the pairing has been successful, and ends this flowchart. For example, if a wireless LAN access point (history 405 in FIG. 4) with the SSID “HIJK” is selected in step S815, both the digital camera 100 and the mobile phone 200 access the wireless LAN as shown in FIG. The point 303 is connected.

  On the other hand, in step S824, the control unit 101 determines whether a predetermined time (eg, 90 seconds) has elapsed since the response to device detection in step S821. If it is determined that the predetermined time has not elapsed, the process returns to step S822 to wait for a pairing reception notification again. On the other hand, if it is determined that the predetermined time has elapsed, the process proceeds to step S825.

  Step S825 is processing when communication with the mobile phone 200 cannot be established (pairing has failed) even though all the wireless LAN access points to which the digital camera 100 can be connected have been tried. In this step, the control unit 101 displays an error message indicating that pairing has failed on the display unit 105, and ends this flowchart.

<Operation description: Mobile phone>
Next, the operation of the mobile phone 200 according to the present embodiment corresponding to the operation of the digital camera 100 described above will be described.

  FIG. 9 is a flowchart for explaining processing related to the proximity wireless communication unit 208 and the wireless LAN connection unit 209 in the mobile phone 200. The processing of this flowchart is realized by the control unit 201 reading out a program recorded in the nonvolatile memory 203 and developing and executing the program in the memory 202. Further, the processing of this flowchart is started in response to, for example, the power supply of the mobile phone 200 being turned on.

  First, in step S <b> 901, the control unit 201 confirms the state of the close proximity wireless communication unit 208 and determines whether the close proximity wireless communication unit 208 can communicate with the close proximity wireless communication unit 111 of the digital camera 100. Specifically, the close proximity wireless communication unit 208 can communicate when the close proximity wireless communication area 1111 of the digital camera 100 and the close proximity wireless communication area 2081 of the mobile phone 200 are sufficiently close.

  If the control unit 201 determines that communication is impossible, the process of this step is repeated and the proximity of the digital camera is awaited. On the other hand, if it is determined that communication is possible, the process proceeds to step S902.

  In step S <b> 902, the control unit 201 receives identification information, a detection period, and the number of surrounding wireless LAN access points from the digital camera 100 via the proximity wireless communication unit 208. This is information transmitted from the digital camera 100 in step S803 in FIG. Here, the following processing will be described on the assumption that UUID {22222222-3333-4444-5555-666666666666} as identification information, 15 seconds as a detection period, and 3 as the number of wireless LAN access points are received.

  In step S903, the control unit 201 uses the identification information acquired in step S902 to identify the other devices participating in the wireless LAN currently connected using the wireless LAN connection unit 209. Attempts to detect information devices (so-called discovery). Specifically, when the identification information is UUID, the control unit 201 searches for a communication device on the network using an SSDP M-Search command. Since the UUID is included in the response to this command, if there is a response including the UUID that matches the identification information (UUID) acquired in step S903, there is a device having the UUID on the currently connected wireless LAN. I understand that.

  When using a host name as identification information, the control unit 201 may search for a device on the network having the host name using the mDNS protocol (name resolution request). In this case, if there is a response to the name resolution request, it is understood that there is a device having the host name on the currently connected wireless LAN.

  In subsequent step S904, the control unit 201 determines whether or not the detection process executed in step S903 is successful. If it is determined that the detection has failed, the process proceeds to step S905. If it is determined that the detection has been successful, the process proceeds to step S908.

  In step S905, the control unit 201 determines whether the elapsed time from the start of the process in step S903 has exceeded the time specified in the detection period received in step S902. If it is determined that it has not exceeded, the process returns to step S903, and the detection of the device is repeated until it exceeds or succeeds in detection. On the other hand, if it is determined that it has exceeded, the process proceeds to step S906.

  In step S906, whether or not the number of executions of the detection process (that is, the loop process in steps S903 to S905) in the predetermined period (the detection period acquired in step S902) exceeds the number of surrounding wireless LAN access points received in step S902. Determine. If it is determined that it has not exceeded, the process returns to step S903 and the detection is continued. On the other hand, if it is determined that it has exceeded, the process proceeds to step S907. In step S906, the number of surrounding wireless LAN access points received in step S902 is used as the upper limit of the number of executions. For example, the upper limit may be the number of wireless LAN access points obtained by the control unit 201 collecting (scanning) surrounding wireless LAN access point information via the wireless LAN connection unit 209.

  Step S907 is processing when communication with the digital camera 100 cannot be established (pairing has failed) even though the mobile phone 200 has repeatedly performed detection processing. In this step, the control unit 201 displays an error message indicating that the pairing has failed on the display unit 204, and ends this flowchart.

  On the other hand, step S908 is processing when the digital camera 100 and the mobile phone 200 can communicate with each other via a wireless LAN (when pairing is completed). In step S908, the control unit 201 uses the connected wireless LAN to notify the digital camera 100 that the pairing has been successful. For example, a predetermined message indicating that pairing is successful is transmitted to the digital camera 100 using the wireless LAN connection unit 209.

  In subsequent step S909, the control unit 201 displays on the display unit 204 that the pairing has been successful, and ends this flowchart.

  As described above, the digital camera according to the present embodiment sequentially switches the network of access points, and detects whether there is a discovery for the own device from within the network. As a result, communication between the digital camera and the mobile phone can be established without exchanging information on the access point.

[Other Examples]
In the above-described embodiment, the case where NFC is used as proximity wireless communication has been described as an example. However, proximity wireless communication is not limited to this. As the close proximity wireless communication, another communication method such as Bluetooth (registered trademark) may be employed.

  In addition to the above-described embodiment, in a digital camera in a state where communication is established via a wireless LAN, the proximity wireless communication unit 111 may be set to be invalid in order to prioritize the communication.

  The present invention is also realized by executing the following processing. That is, software (program) that realizes the functions of the above-described embodiments is supplied to a system or apparatus via a network or various recording media, and a computer (or CPU, MPU, etc.) of the system or apparatus reads and executes the program code. It is processing to do. In this case, the program and the recording medium storing the program constitute the present invention.

Claims (10)

A sharing means for sharing identification information not including information for participating in an access point of a network in which the external device is participating via communication of the first communication method with the external device;
A joining unit that joins a network using a second communication method different from the first communication method, generated by another device, and searches the network joined by the joining unit to include the identification information A judging means for judging whether or not a signal is received;
And a control unit that switches whether to control the participation unit to participate in another network based on the result of the determination unit.   The control means, when it is judged by the judging means that the signal including the identification information has not been received, the control means controls to leave the participating network and join another network. The communication apparatus according to 1.   3. The communication apparatus according to claim 1, wherein the control unit performs control so as to preferentially participate in a network that has participated in the past when the participation unit participates in the network. 4. In addition to the identification information, the sharing means also shares information on signal strength,
The joining means joins the network by detecting a beacon of the other device;
The control means, when joining the network by the joining means, performs control so as to preferentially join the network of a device that transmits a beacon having a strength closer to the strength of the signal shared by the sharing means. The communication apparatus according to any one of claims 1 to 3. The identification information is identification information of the external device,
The sharing means is configured to share the identification information with the external device by receiving the identification information of the external device from the external device via communication of the first communication method. The communication apparatus according to any one of 1 to 4. Transmitting means for transmitting a search signal for searching for a device in the network in response to participation in the network using the second communication method by the participation means;
Receiving means for receiving a response signal to the search signal by the transmitting means;
The communication apparatus according to claim 5, wherein the determination unit determines whether a response signal including the identification information is received by the reception unit. The identification information is identification information of the communication device,
The sharing means shares the identification information with the external device by transmitting the identification information of the communication device to the external device via communication of the first communication method. The communication apparatus according to any one of 1 to 4. Receiving means for receiving a search signal from a device in the network joined by the joining means;
A transmission means for transmitting a response signal to the search signal received by the reception means to a device that is a transmission source of the search signal;
The communication apparatus according to claim 7, wherein the determination unit determines whether a search signal including the identification information is received by the reception unit. A sharing step of sharing identification information not including information for participating in an access point of a network in which the external device is participating through communication of the first communication method with an external device;
Participating in a network using a second communication method different from the first communication method generated by another device;
A determination step of determining whether or not a signal including the identification information is received by searching the network that has participated in the participation step;
A control method for a communication apparatus, comprising: a control step of switching whether to perform control so as to participate in another network based on a result of the determination step.   A computer-readable program for causing a computer to execute the control method according to claim 9.

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