JP2015211353A - Communication terminal, data transmission system and connection control method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily set a wireless LAN connection between a digital camera and a communication terminal.SOLUTION: To the wireless LAN generated by a connection part (126) of a digital camera (110), the connection condition thereof is input from an operation part (150) to connect a communication terminal (140). A proximity radio communication part (158) stores a connection condition of the wireless LAN and identification information of the communication terminal (140) into a nonvolatile memory (130) in the proximity radio communication part (128) of the digital camera (110). Thereafter, the communication terminal (140), when approaching the digital camera (110), reads out the storage data in the nonvolatile memory (130) of the proximity radio communication part (128) by the proximity radio communication part (158). The communication terminal (140), when the self-identification information is included in the storage data, performs radio connection to the wireless LAN of the digital camera (110) by the connection part (156).

Description

  The present invention relates to a communication terminal, a data transmission system, and a connection control method thereof.

  2. Description of the Related Art In recent years, a technique for mounting a wireless communication function in a digital camera and transmitting image data to other devices wirelessly is known. For example, Patent Document 1 describes a digital camera that wirelessly transmits image data captured in advance to another apparatus using a wireless LAN.

JP 2009-171491 A

  In the technique described in Patent Document 1, when wirelessly transmitting captured image data from a camera to another device, a user must manually perform a transmission operation after switching to a communication mode by a menu operation or the like. It must be cumbersome.

  An object of the present invention is to present a communication terminal, a data transmission system, and a connection control method thereof that facilitate wireless connection between specific devices.

  The communication terminal according to the present invention wirelessly connects to a transmission device having a proximity wireless communication unit having a non-volatile memory that can be read and written only from the outside, and a wireless network generation unit that generates a wireless network having a predetermined connection setting. A communication terminal for receiving data from the apparatus, means for storing identification information, read / write means for reading / writing data in the nonvolatile memory of the proximity wireless communication means, and wireless connection means for participating in the wireless network; A determination unit that determines whether or not the identification information is registered in the data read from the nonvolatile memory by the read / write unit according to proximity to the distance at which the proximity wireless communication with the transmission device is possible; When the communication terminal is not registered in the data read from the nonvolatile memory by the read / write unit When the communication terminal is registered in the data read from the nonvolatile memory by the read / write means, the means for writing the connection setting and the identification information of the wireless network to the nonvolatile memory, And means for causing the wireless connection means to participate in the wireless network.

  According to the present invention, a simplified wireless connection is applied to a communication terminal that has been confirmed in advance, so that the connection procedure can be facilitated while ensuring security.

It is a schematic block diagram of one Example of this invention. It is an example of a connection sequence of a present Example. It is an example of data written in the non-volatile memory of a near field communication part. It is an example of a display screen of a present Example. It is an operation | movement flowchart of a communication terminal. It is an operation | movement flowchart of a digital camera.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 shows a schematic block diagram of an embodiment of a data transmission system according to the present invention comprising an imaging device (image transmission side) and a communication terminal (image reception side or relay device) such as a mobile phone. Although a digital camera is illustrated as an example of an imaging device, an imaging device incorporated in a smartphone or an imaging device incorporated in various information processing devices may be used.

  The configuration and basic functions of the digital camera 110 will be described. The control unit 112 controls each unit of the digital camera 110 according to the input signal and a program described later. The control unit 112 may be composed of single hardware and one or a plurality of software operating on the hardware, or may be composed of a plurality of hardware and software operating on the hardware.

  The imaging unit 114 includes an optical lens unit, a lens control system that controls the aperture, zoom, and focus of the optical lens unit, and an imaging device that converts an optical image by the optical lens unit into an electrical image signal. Examples of the image sensor include a complementary metal oxide semiconductor (CMOS) image sensor and a charge coupled device image sensor (CCD) image sensor.

  Under the control of the control unit 112, the imaging unit 114 converts the subject optical image formed by the optical lens lens into an electrical signal by the imaging device, and outputs image data that has undergone noise reduction processing and the like. In this embodiment, the image data is recorded on the recording medium 124 in accordance with the DCF (Design Rule for Camera File system) standard.

  The non-volatile memory 116 is an electrically erasable / recordable non-volatile memory, and stores a control program (described later) executed by the control unit 112, fixed data, and the like.

  The work memory 118 is used as a buffer memory that temporarily holds image data picked up by the image pickup unit 114, an image display memory of the display unit 122, a work area of the control unit 112, and the like.

  The operation unit 120 is used to receive an instruction for the digital camera 110 from a user. The operation unit 120 includes, for example, a power button for instructing the user to turn on / off the digital camera 110, a release switch for instructing imaging, and a playback button for instructing playback of image data.

  The release switch incorporates a switch SW1 that is turned on when it is half-pressed and a switch SW2 that is turned on when it is fully pressed. When SW1 is turned on, the control unit 112 enables still image capturing preparation processing such as AF (auto focus) processing, AE (auto exposure) processing, AWB (auto white balance) processing, and EF (flash pre-flash) processing. To do. When the switch SW2 is turned on, the control unit 112 performs capturing and recording of captured image data by the imaging unit 114.

  The operation unit 120 includes an easy connection button 121 that instructs to start communication with an external device (the communication terminal 140 in FIG. 1) via a connection unit 126 described later. The easy connection button 121 is associated in advance with a partner terminal to be connected by the operation and connection conditions (connection parameters, procedures, and the like). When the user operates the easy connection button 121, the control unit 112 starts a connection procedure to a terminal designated in advance. A communication start method using the easy connection button 121 will be described later. The operation unit 120 also includes a touch panel arranged on the screen of the display unit 122.

  The display unit 122 can display a live view image, a captured still image, a character / menu for interactive operation, and the like in a still image capturing preparation stage. The display unit 122 is not necessarily built in the digital camera 110. That is, the display unit 122 may be a display unit disposed on the back surface of the digital camera 110 or a display unit externally connected to the digital camera 110. The digital camera 110 has a display control function for controlling display. At least.

  The recording medium 124 can record the image data output from the imaging unit 114. The recording medium 124 may be detachable from the digital camera 110 or may be built in the digital camera 110. That is, the digital camera 110 only needs to have at least means for accessing the recording medium 124.

  The connection unit 126 is an interface for connecting to an external device. The digital camera 110 can exchange data with an external device (for example, the communication terminal 140) via the connection unit 126. The connection unit 126 includes an interface that communicates with an external device through a so-called wireless LAN in accordance with the IEEE 802.11 standard. The control unit 112 realizes wireless communication with an external device (for example, the communication terminal 140) by controlling the connection unit 126.

  The close proximity wireless communication unit 128 includes an antenna for wireless communication, a modulation / demodulation circuit that processes wireless signals, a communication controller 132, and a nonvolatile memory 130 that stores communication data. The close proximity wireless communication unit 128 outputs a modulated wireless signal from the antenna, and demodulates the wireless signal received by the antenna, thereby realizing contactless proximity communication in accordance with the ISO / IEC 18092 standard (NFC: Near Field Communication). . The close proximity wireless communication unit 128 is disposed on the side of the digital camera 110 but is not electrically connected to the control unit 112. Therefore, the control unit 112 cannot control the close proximity wireless transfer unit 128 and cannot access the nonvolatile memory 130. In order to realize communication between NFC standard communication devices, these communication devices do not need to be in direct contact with each other, and may be located within a certain distance that allows communication. In this specification, being located within a certain distance where communication is possible is expressed as “proximity”.

  The easy connection button 121 is an interface for easily connecting the digital camera 110 to an external device including the communication terminal 140. By setting or designating an external device to be connected with the digital camera 110 in advance, the camera 110 connects to the predesignated external device immediately after selecting the easy connection button 121. The easy connection button 121 is an operation member provided exclusively for instructing connection with an external device. A method of wireless LAN connection using the easy connection button 121 will be described later.

  The configuration and basic functions of the communication terminal 140 will be described. The communication terminal 140 is connected to the public communication network 172 via a base station 170 provided by a public wireless communication company. The communication terminal 140 can also communicate with the digital camera 110 via short-range communication means such as a wireless LAN, and can also communicate with the close proximity wireless communication unit 128 of the digital camera 110 by close proximity wireless communication.

  The control unit 142 of the communication terminal 140 controls each unit of the communication terminal 140 according to the input signal and a program described later. The control unit 142 may be composed of single hardware and one or a plurality of software operating on the hardware, or may be composed of a plurality of hardware and software operating on the hardware.

  The imaging unit 144 includes an optical lens unit, a lens control system that controls the aperture, zoom, and focus of the optical lens unit, and an imaging device that converts an optical image from the optical lens unit into an electrical image signal. The image sensor may be any of a CMOS image sensor, a CCD image sensor, or the like.

  Under the control of the control unit 142, the imaging unit 144 converts the subject optical image formed by the optical lens lens into an electrical signal by the imaging element, and outputs image data that has undergone noise reduction processing and the like. In this embodiment, the image data is recorded on the recording medium 154 according to the DCF (Design Rule for Camera File system) standard.

  The non-volatile memory 146 is an electrically erasable / recordable non-volatile memory, and stores a control program to be described later executed by the control unit 142, fixed data, and the like.

  The work memory 148 is used as a buffer memory that temporarily holds image data picked up by the image pickup unit 144, an image display memory of the display unit 152, a work area of the control unit 142, and the like.

  The operation unit 150 is used to receive an instruction for the communication terminal 140 from a user. The operation unit 150 includes, for example, a power button for instructing the power on / off of the communication terminal 140 and an operation button for instructing the control unit 142 to perform screen transition, and a touch panel disposed on the screen of the display unit 152. Including.

  The display unit 152 can display a live view image, a captured still image, a character / menu for interactive operation, and the like in a still image capturing preparation stage. The display unit 152 is not necessarily built in the communication terminal 140, and the communication terminal 140 only needs to have at least a display control function for controlling display contents.

  The recording medium 154 can record image data output from the imaging unit 144 and data received from an external device. The recording medium 154 may be detachable from the communication terminal 140 or may be built in the communication terminal 140. That is, the communication terminal 140 only needs to have a means for accessing at least the recording medium 154.

  The connection unit 156 is an interface for connecting to an external device. The communication terminal 140 can exchange data with an external device (for example, the digital camera 110) via the connection unit 156. The connection unit 156 includes an interface that communicates with an external device through a so-called wireless LAN in accordance with the IEEE 802.11 standard. The control unit 142 controls the connection unit 156 to realize wireless communication with an external device (for example, the digital camera 110).

  The close proximity wireless communication unit 158 is a device communicable with the close proximity wireless communication unit 128, which includes an antenna for wireless communication, a modulation / demodulation circuit that processes a wireless signal, and a communication controller. When approaching within a predetermined distance, the proximity wireless communication unit 158 can read and write data in the nonvolatile memory 130. The proximity wireless communication unit 158 outputs non-contact proximity communication in accordance with the ISO / IEC 18092 standard (NFC: Near Field Communication) by outputting a modulated wireless signal from the antenna and demodulating the wireless signal received by the antenna. . The close proximity wireless transfer unit 158 is disposed on the side of the communication terminal 140 and is electrically connected to the control unit 142. Unlike the close proximity wireless communication unit 128, the control unit 142 can control the operation of the close proximity wireless communication unit 158 and can access communication contents.

  When the close proximity wireless communication unit 128 and the close proximity wireless communication unit 158 communicate, it is not always necessary to physically contact the close proximity wireless communication unit 128 and the close proximity wireless communication unit 158. That is, the close proximity wireless communication unit 128 and the close proximity wireless communication unit 158 can communicate even if they are separated from each other by a certain distance, and may be close to a distance that enables close proximity wireless communication. In the following description, the approach to the close wireless communication range is expressed as “proximity”.

  Further, if the close proximity wireless communication unit 128 and the close proximity wireless communication unit 158 are within a range where close proximity wireless communication is not possible, communication is not started. Further, the proximity wireless communication unit 128 and the proximity wireless communication unit 158 are incapable of proximity wireless communication in a state where the proximity wireless communication unit 128 and the proximity wireless communication unit 158 are within a range where the proximity wireless communication is possible and communication is established. If it is far away, communication is disconnected.

  The contactless proximity communication realized by the proximity wireless communication unit 128 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 units 128 and 158.

  The public wireless communication unit 160 is an interface that connects to the public communication network 172 via the base station 170 provided by the public wireless communication company and communicates with other communication terminals via the public communication network 172. The public wireless communication unit 160 includes an antenna for wireless communication, a modulation / demodulation circuit that processes a wireless signal, and a communication controller. The public wireless communication unit 160 realizes public wireless communication in accordance with a standard such as W-CDMA (UMTS) or LTE (Long Term Evolution).

  The digital camera 110 has a normal connection mode for wireless connection with an arbitrary general external communication device by a predetermined operation, and an easy connection mode for wireless connection with a previously registered external communication device by a simpler operation. The user can select which connection mode to use.

  When connecting to the communication terminal 140 in the normal connection mode, the user operates the operation unit 120 of the digital camera 110 to display a menu related to the wireless LAN on the display unit 122, and manually connects the camera 110 to the communication terminal 140 with respect to the menu. Connect to. When the communication terminal 140 is desired to be the connection destination in the easy connection mode, the communication terminal 140 and its connection condition are associated with the easy connection button 121 in advance, and the control unit 142 registers in advance according to the operation of the easy connection button 121. Attempt to connect to the specified destination. That is, in the easy connection mode, the user only has to register the connection conditions with the connection destination terminal in advance, and press the easy connection button 121 when he / she actually wants to connect. A plurality of connection destinations may be registered in the easy connection button. A plurality of simple connection buttons each registering one connection destination may be provided.

  With reference to FIG. 2, the connection control method of a present Example is demonstrated. FIG. 2 is a sequence for wirelessly connecting the digital camera 110 and the communication terminal 140 in the easy connection mode, where (a) shows the first time, and (b) shows the second and subsequent times.

  A first connection sequence will be described with reference to FIG. The first time includes processing for registering the connection partner and the connection condition in the nonvolatile memory 130 of the close proximity wireless transfer unit 128.

  In step S201, the user brings the digital camera 110 and the communication terminal 140 close to each other. In step S <b> 202, the communication terminal 140 reads data in the nonvolatile memory 130 built in the close proximity wireless communication unit 128 of the digital camera 110 using the close proximity wireless communication unit 158. The read data includes, for example, application information 300 as shown in FIG. 3A and UUID information 302 that identifies the camera 110. The application information 300 is identification information for identifying application software (hereinafter, abbreviated as “application”) installed in the communication terminal 140 that transfers image data from the digital camera 110 by wireless LAN communication.

  When the application information 300 is read by the close proximity wireless communication unit 158, the communication terminal 140 activates the application specified by the application information 300 in step S203. Of course, when the application is not installed, the control unit 142 displays inactivation on the display unit 152.

  When the user presses the easy connection button 121 of the digital camera 110 in step S204, the digital camera 110 activates the wireless connection unit 126 and generates a wireless LAN or a wireless network in step S205. That is, the wireless connection unit 126 functions as a wireless network generation unit. At this time, the camera 110 newly issues wireless LAN connection setting information such as an SSID (Service Set Identifier) and a password for the wireless LAN. The digital camera 110 displays the generated wireless LAN connection setting information on the display unit 122 as shown in FIG.

  In S206, the user operates the operation unit 150 of the communication terminal 140 to manually connect to the wireless LAN of the camera 110 with the wireless LAN connection setting displayed on the display unit 122 of the digital camera 110. For example, the user operates the operation unit 150 of the communication terminal 140 to activate a wireless LAN connection application. Then, the user selects the wireless LAN generated by the digital camera 110 from the wireless LAN search screen as shown in FIG. 4B and inputs the password displayed on the display unit 122. Thereby, the communication terminal 140 participates or connects to the wireless LAN generated by the digital camera 110 in S207.

  In S208, the communication terminal 140 searches for a device (in this case, the digital camera 110) specified by the UUID information 302 on the connected wireless LAN, and transfers the image data from the camera 110 to the communication terminal 140 using the communication protocol. 110 is connected. When the transmission destination device is specified by connecting with the image transfer communication protocol, the image transmission destination for the digital camera 110 is specified.

  In step S <b> 209, the digital camera 110 registers the communication terminal 140 in the nonvolatile memory 116 as a connection partner for the operation of the easy connection button 121. The information registered at this time includes, for example, the SSID and password of the wireless LAN network generated in step S205, identification information for specifying the communication terminal 140, and the like.

  In step S210, the user brings the digital camera 110 and the communication terminal 140 close together again. Thereby, in S211, the communication terminal 140 reads the data in the nonvolatile memory 130 of the close proximity wireless transfer unit 128 of the digital camera 110 and confirms whether the data is the same as the data read in Step S202. In addition, the communication terminal 140 receives information indicating a device registered in the digital camera 110 as a connection partner by operating the easy connection button 121 from the camera 110 via the wireless LAN, and is registered in the digital camera 110 as the connection partner. Whether the information indicating the device is the communication terminal 140 is confirmed.

  If the data read from the nonvolatile memory 130 in S202 and S211 is not the same, or if the connection partner by the operation of the easy connection button 121 is not the communication terminal 140, the communication terminal 140 ends the subsequent processing. Conversely, if the data read from the non-volatile memory 130 in S202 and S211 is the same and the connection partner by the operation of the easy connection button 121 is the communication terminal 140, the communication terminal 140 executes step S212.

  In S <b> 212, the communication terminal 140 writes the wireless LAN connection information and the identification information of the communication terminal 140 in the nonvolatile memory 130. FIG. 3B shows an example of information that the communication terminal 140 writes in the nonvolatile memory 130 in S212. The application information 310 contains the same contents as the application information 300, and the UUID information 312 contains the same contents as the UUID information 302. The connection information 314 includes an identifier 316 of the communication terminal 140, a wireless LAN SSID 318, and a password 320. The wireless LAN connection information written in the non-volatile memory 130 by the communication terminal 140 in S212 is the same as the information registered in association with the easy connection button 121 by the digital camera 110 in Step S209.

  In executing the processing of S211 to S212, it may be necessary to set the mode in which the application is written in the tag in advance. This is because if rewriting is performed simply by approaching, it may be rewritten without the user's intention. In addition, the processing that triggers and starts the proximity in a state where the connection via the wireless LAN is established is not necessarily fixed to the processing that writes in the nonvolatile memory 130 built in the proximity wireless communication unit 128. For example, the user may be allowed to set in advance what functions are activated when approaching by using an in-app menu. Alternatively, any one of the default functions may be set, and the processing of S211 to S212 may be executed using a trigger when the operation member is operated or the software button is selected as a trigger. Good. Further, as other functions that are triggered by proximity, for example, transmission of an image via an established wireless LAN, switching of a wireless LAN connection by proximity to another digital camera, and the like can be considered.

  With reference to FIG. 2B, the second and subsequent connection sequences will be described. Here, a connection operation between the digital camera 110 and the communication terminal 140 using the easy connection button 121 will be described.

  Similar to step S201, the user brings the digital camera 110 and the communication terminal 140 close to each other in step S231. Then, in step S232, the communication terminal 140 reads data stored in the nonvolatile memory 130 built in the close proximity wireless transfer unit 128 of the digital camera 110. Unlike the content read in step S202, the data read in step S232 is data as shown in FIG. 3B written from the communication terminal 140 in step S212.

  In step S233, the communication terminal 140 activates the application specified by the application information 310 in the data read from the nonvolatile memory 130. Following S233 or in parallel with S233, the communication terminal 140 starts searching for the wireless LAN specified by the wireless connection information 314 in the data read from the nonvolatile memory 130, and tries to connect as soon as it is found. .

  On the other hand, in S <b> 235, the user presses the easy connection button 121 of the digital camera 110. In response to the pressing operation of the easy connection button 121, in step S236, the digital camera 110 activates or validates the wireless LAN of the connection unit 126 based on the information registered in step S209. The activated wireless LAN connection information (SSID and password) is the same as the wireless connection information 314 recorded in the nonvolatile memory 130 built in the close proximity wireless communication unit 128 of the digital camera 110.

  That is, the digital camera 110 and the communication terminal 140 share the same wireless LAN connection information. As a result, when the digital camera 110 activates the wireless LAN, the communication terminal 140 can find the wireless LAN by wireless LAN search, and can participate in the wireless LAN generated by the digital camera 110 in step S237.

  In step S238, the digital camera 110 and the communication terminal 140 establish a communication protocol connection for transmitting image data from the digital camera 110 to the communication terminal 140.

  As described above, the communication protocol connection for transmitting the image data from the digital camera 110 to the communication terminal 140 can be established without operating the operation unit 150 of the communication terminal 140 at all from the second time.

  FIG. 5 is an operation flowchart of the communication terminal 140.

  In step S501, the user brings the digital camera 110 and the communication terminal 140 close to each other. In step S <b> 502, the control unit 142 of the communication terminal 140 reads data in the nonvolatile memory 130 built in the close proximity wireless communication unit 128 of the digital camera 110 using the close proximity wireless communication unit 158.

  In step S503, the control unit 142 activates the application specified by the application information 300 read from the nonvolatile memory 130. In step S504, the control unit 142 determines whether the identifier of the communication terminal 140 itself is described in the data read in step S502. When the control unit 142 determines that the identifier of the communication terminal 140 itself is not described in the data read in step S502, the nonvolatile memory 130 has already been written from another device, or from which other device Is not written. In this case, the control unit 142 proceeds with the process to step S505.

  In step S505, the user operates the operation unit 150 to activate an application for switching the wireless LAN connection. The control unit 142 searches for nearby wireless LANs through the connection unit 156, and displays a list of detected wireless LANs on the display unit 152 as shown in FIG. 4B in step S506. In step S507, the user uses the operation unit 150 to select a wireless LAN generated by the digital camera 110 from the list of wireless LANs displayed on the display unit 152, and the control unit 142 inputs a corresponding password.

  In step S508, the control unit 142 instructs the connection unit 156 to connect to a wireless LAN selected by the user (a wireless LAN generated by the digital camera 110). When the wireless LAN connection is established, the control unit 142 establishes a communication protocol for image data transfer with the digital camera 110 through the connection unit 156 in step S509.

  In step S510, the user brings the communication terminal 140 and the digital camera 110 close to each other. Then, in step S 511, the control unit 142 of the communication terminal 140 reads data stored in the nonvolatile memory 130 from the close proximity wireless communication unit 128 of the digital camera 110 via the close proximity wireless communication unit 158.

  In step S512, the control unit 142 determines whether the data read in step S511 is the same as the data read in step S502, and receives information on the connection partner by the easy connection button 121 via the wireless LAN. Instead of receiving the information of the connection partner by the easy connection button 121, it may be inquired whether the connection partner is the communication terminal 140 and the answer may be obtained. That is, the identifier of the communication terminal 140 is transmitted to the digital camera 110, and the digital camera 110 that has received the identifier confirms whether or not it matches the information of the connection partner by the easy connection button 121. Then, based on the response according to the confirmation result, it is determined whether the communication terminal 140 has been registered as a connection partner by the easy connection button 121 of the digital camera 110. If the data read in step S511 is not the same as the data read in step S502, or if the communication terminal 140 is not registered as a connection partner, the control unit 142 ends the flow shown in FIG. If the data read in step S511 is not the same as the data read in step S502, for example, the partner that the communication terminal 140 has approached in step S510 may be different from the partner that has approached in step S502. Further, when the communication terminal 140 is not registered as a connection partner, for example, when no device has been registered as a connection partner by the easy connection button 121, or another device has been registered as a connection partner by the easy connection button 121. It may be the case.

  If the data read in step S511 is the same as the data read in step S502 and the communication terminal 140 is registered as the connection partner of the easy connection button 121, the control unit 142 proceeds to step S513. In step S513, the control unit 142 writes the identifier of the communication terminal 140 and the connection information of the wireless LAN connected in S508 to the nonvolatile memory 130 of the digital camera 110 through the proximity wireless communication unit 158.

  In step S504, when the control unit 142 determines that the identifier indicating the communication terminal 140 is described in the data read in step S502, the control unit 142 proceeds to step S514. In step S514, the control unit 142 wirelessly connects to the wireless LAN of the digital camera 110 through the connection unit 156 according to the connection information (SSID and password) in the data acquired in step S502. In step S515, the control unit 142 establishes a communication protocol connection for receiving image data from the digital camera 110 through the connection unit 156, as in step S509.

  FIG. 6 is an operation flowchart of the digital camera 110.

  When the user presses the easy connection button 121 in step S601, in step S602, the control unit 112 refers to the nonvolatile memory 116 and determines whether or not the communication terminal 140 is registered as a connection partner in the easy connection button 121. to decide. When the control unit 112 determines that the communication terminal 140 is not registered in the easy connection button 121, the process proceeds to step S603. In step S603, the control unit 112 newly generates a wireless LAN SSID and password. In step S604, the control unit 112 causes the connection unit 126 to generate a wireless LAN based on the information generated in step S603.

  When the communication terminal 140 is connected to the wireless LAN generated in step S604, in step S605, the control unit 112 establishes a connection with the communication terminal 140 using the communication protocol for image transfer through the connection unit 126. When the connection of the communication protocol is completed, the control unit 112 stores the identifier of the communication terminal 140 and the generated wireless LAN SSID and password in the nonvolatile memory 116 as registration information of the easy connection button 121 in step S606.

  When the control unit 112 determines in step S602 that the communication terminal 140 is registered in the easy connection button 121, the control unit 112 proceeds to step S607. In step S <b> 607, the control unit 112 reads wireless LAN connection information (SSID and password) registered in the nonvolatile memory 116. In step S608, the control unit 112 causes the connection unit 126 to generate the wireless LAN of the connection information read in step S607.

  When the communication terminal 140 connects to the wireless LAN of the camera 110, in step S609, the control unit 112 establishes a connection with the communication terminal 140 using the communication protocol for image transfer through the connection unit 126 in the same manner as in step S605.

  As described above, when the connection between the digital camera 110 and the communication terminal 140 using the communication protocol on the wireless LAN is completed, the user can capture a desired image of the camera 110 into the recording medium 154 of the communication terminal 140. For example, as shown in FIG. 3C, an image stored in the recording medium 124 of the digital camera 110 is displayed on the display unit 152 of the communication terminal 140. The user designates a desired image from the images displayed on the display unit 152 and instructs the communication terminal 140 to transfer to the communication terminal 140. In response to this instruction, the control unit 142 of the communication terminal 140 instructs the digital camera 110 to transfer the selected image to the communication terminal 140, and the digital camera 110 transmits the requested image to the communication terminal 140. The communication terminal 140 stores the image data of the image received from the camera 110 in the recording medium 154.

  In the above-described embodiment, whether or not the data read in step S511 in FIG. 5 is the same as the data read in step S502 is used as a condition for writing information to the tag of the digital camera 110. However, the communication between the digital camera 110 and the communication terminal 140 via the wireless LAN does not necessarily pass through the proximity of S201 in FIG. As described above, when the wireless LAN connection is started without using the close proximity wireless communication unit triggered by the menu operation by the user, the processing of S201 to S202 is not necessary. Therefore, in this case, as a condition for writing information to the tag, UUID information is requested and received from the digital camera 110 connected via the wireless LAN, and the UUID information 302 read from the tag in step S511 in FIG. The result compared with is used. This confirms that the connected digital camera and the adjacent digital camera are the same device.

  The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to these specific embodiments, and various forms within the scope of the present invention are also included in the present invention. . A part of the above-described embodiments may be appropriately combined.

  Also, a software program that implements the functions of the above-described embodiments is supplied from a recording medium directly to a system or apparatus having a computer that can execute the program using wired / wireless communication, and the program is executed. Cases are also included in the present invention. Accordingly, the program code itself supplied and installed in the computer in order to implement the functional processing of the present invention by the computer also realizes the present invention. That is, the computer program itself for realizing the functional processing of the present invention is also included in the present invention. In this case, the program may be in any form as long as it has a program function, such as an object code, a program executed by an interpreter, or script data supplied to the OS.

  The recording medium for supplying the program may be, for example, a magnetic recording medium such as a hard disk or a magnetic tape, an optical / magnetomagnetic recording medium, or a nonvolatile semiconductor memory. As a program supply method, a computer program that forms the present invention is stored in a server on a computer network, and a connected client computer downloads and programs the computer program.

Claims (4)

A communication terminal that wirelessly connects to a transmission device having a proximity wireless communication unit having a non-volatile memory that can be read and written only from the outside and a wireless network generation unit that generates a wireless network having a predetermined connection setting, and receives data from the transmission device Because
Means for storing identification information;
Read / write means that can read and write data to the nonvolatile memory of the proximity wireless communication means,
A wireless connection means capable of joining the wireless network;
Determining means for determining whether or not the identification information is registered in the data read from the nonvolatile memory by the read / write means according to proximity to the distance at which the proximity wireless communication with the transmission device is possible;
Means for causing the read / write means to write the connection setting and the identification information to the nonvolatile memory when the communication terminal is not registered in the data read from the nonvolatile memory by the read / write means;
A communication terminal comprising: means for causing the wireless connection means to participate in the wireless network when the communication terminal is registered in data read from the nonvolatile memory by the read / write means.   The communication terminal according to claim 1, further comprising communication means for connecting to a public communication network. Proximity wireless communication means comprising a non-volatile memory that can be read and written only from the outside by proximity wireless communication;
Wireless network generation means for generating a wireless network with predetermined connection settings;
Operating means for instructing a wireless connection to the associated device;
From a transmission device having
Means for storing identification information;
Read / write means that can read and write data to the nonvolatile memory of the proximity wireless communication means,
A data transmission system for transmitting data to a receiving device having a wireless connection means capable of participating in the wireless network,
The receiving device is
Judgment to determine whether or not the identification information is registered in the data read from the nonvolatile memory by the read / write unit according to the proximity of the transmitter and the receiver to the distance at which the proximity wireless communication is possible Means,
Means for causing the read / write means to write the connection setting and the identification information to the nonvolatile memory when the identification information is not registered in the data read from the nonvolatile memory by the read / write means;
A data transmission system comprising: means for causing the wireless connection means to participate in the wireless network when the identification information is registered in data read from the nonvolatile memory by the read / write means. Proximity wireless communication means comprising a non-volatile memory that can be read and written only from the outside by proximity wireless communication;
Wireless network generation means for generating a wireless network with predetermined connection settings;
Operating means for instructing a wireless connection to the associated device;
From a transmission device having
Read / write means that can read and write data to the nonvolatile memory of the proximity wireless communication means,
In a data transmission system for transmitting data to a receiving device having wireless connection means capable of participating in the wireless network,
The read / write means reads the data stored in the non-volatile memory in response to a first approach to the distance at which the close proximity wireless communication between the transmission device and the reception device is possible, and the wireless connection means transmits data to the wireless network. A connection step to connect;
In response to a second approach to the distance at which the close proximity wireless communication between the transmission device and the reception device is possible, the read / write unit transmits the identification information of the reception device and the connection setting information of the wireless network to the nonvolatile memory. Write step to write to the memory;
In accordance with the proximity after the writing step to the distance at which the close proximity wireless communication between the transmitting device and the receiving device is possible, the receiving device reads and reads the data stored in the nonvolatile memory by the read / write unit. And a step of connecting to the wireless network by the wireless connection means when its identification information is registered in the data.

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