WO2015122129A1 - Appareil de communication, procédé de commande d'appareil de communication et programme - Google Patents

Appareil de communication, procédé de commande d'appareil de communication et programme Download PDF

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Publication number
WO2015122129A1
WO2015122129A1 PCT/JP2015/000350 JP2015000350W WO2015122129A1 WO 2015122129 A1 WO2015122129 A1 WO 2015122129A1 JP 2015000350 W JP2015000350 W JP 2015000350W WO 2015122129 A1 WO2015122129 A1 WO 2015122129A1
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WIPO (PCT)
Prior art keywords
communication
digital camera
communication method
cpu
external apparatus
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PCT/JP2015/000350
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English (en)
Inventor
Atsushi Kumagai
Takeshi Shinomiya
Original Assignee
Canon Kabushiki Kaisha
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Priority claimed from JP2014025736A external-priority patent/JP6395394B2/ja
Priority claimed from JP2014025735A external-priority patent/JP2015154205A/ja
Application filed by Canon Kabushiki Kaisha filed Critical Canon Kabushiki Kaisha
Publication of WO2015122129A1 publication Critical patent/WO2015122129A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/005—Discovery of network devices, e.g. terminals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/80—Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication

Definitions

  • the present invention relates to a technique for performing data communication between terminals.
  • a communication apparatus which is capable of using a first communication method and a second communication method that can realize communication with lower power consumption than the first communication method, includes a first reception means for receiving information about an external apparatus by the second communication method, a second reception means for receiving information about the external apparatus with use of the first communication method after the first reception means receives the information about the external apparatus, a determination means for determining whether to establish communication by the first communication method based on the information about the external apparatus that is received by the first reception means and the information about the external apparatus that is received by the second reception means, and a communication control means for participating in a wireless network for communicating with the external apparatus to establish the communication with the external apparatus if the determination means determines to establish the communication by the first communication method.
  • Fig. 1 illustrates hardware configurations of a digital camera and a mobile phone.
  • Fig. 2A illustrates a front view of the mobile phone.
  • Fig. 2B illustrates a side view of the mobile phone.
  • Fig. 3A illustrates a front view of the digital camera.
  • Fig. 3B illustrates a back view of the digital camera.
  • Fig. 3C illustrates a bottom view of the digital camera.
  • Fig. 4 is a flowchart illustrating a process flow of the digital camera.
  • Fig. 5A illustrates a display screen of the digital camera.
  • Fig. 5B illustrates a display screen of the digital camera.
  • Fig. 5C illustrates a display screen of the digital camera.
  • Fig. 5D illustrates a display screen of the digital camera.
  • Fig. 5A illustrates a display screen of the digital camera.
  • Fig. 5B illustrates a display screen of the digital camera.
  • Fig. 5C illustrates a display screen
  • FIG. 5E illustrates a display screen of the digital camera.
  • Fig. 6 is a flowchart illustrating a process flow of the mobile phone.
  • Fig. 7A illustrates a display screen of the mobile phone.
  • Fig. 7B illustrates a display screen of the mobile phone.
  • Fig. 7C illustrates a display screen of the mobile phone.
  • Fig. 7D illustrates a display screen of the mobile phone.
  • Fig. 8A illustrates a display screen of the digital camera.
  • Fig. 8B illustrates a display screen of the digital camera.
  • Fig. 8C illustrates a display screen of the digital camera.
  • Fig. 9 is a flowchart illustrating a process flow of the digital camera.
  • Fig. 10 is a flowchart illustrating a process flow of the mobile phone.
  • Fig. 9 is a flowchart illustrating a process flow of the digital camera.
  • Fig. 10 is a flowchart illustrating a process flow of the mobile
  • FIG. 11A illustrates a display screen of the mobile phone.
  • Fig. 11B illustrates a display screen of the mobile phone.
  • Fig. 11C illustrates a display screen of the mobile phone.
  • Fig. 11D illustrates a display screen of the mobile phone.
  • Fig. 11E illustrates a display screen of the mobile phone.
  • Fig. 11F illustrates a display screen of the mobile phone.
  • Fig. 11G illustrates a display screen of the mobile phone.
  • Fig. 12 is a flowchart illustrating a process flow of the digital camera.
  • Fig. 13 is a flowchart illustrating a process flow of the mobile phone.
  • Fig. 1 illustrates an overview of a communication system according to the present exemplary embodiment.
  • the communication system according to the present exemplary embodiment includes a mobile phone 100 and a digital camera 120. These apparatuses are examples of mobile wireless communication apparatuses.
  • the mobile phone 100 and the digital camera 120 can perform wireless local area network (LAN) communication for communicating with an external apparatus.
  • the mobile phone 100 and the digital camera 120 each have a function of communicating with a not-illustrated wireless LAN access point (hereinafter referred to as an AP) to connect to a wireless network, and also have a function of directly communicating with each other without using the AP.
  • LAN local area network
  • a central processing unit (CPU) 101, a random access memory (RAM) 102, a nonvolatile memory 103, a display unit 104, an operation unit 105, a battery 106, a third-generation (3G) communication unit 107, a wireless LAN unit 108, and a power saving wireless communication unit 109 are connected to a system bus 110 of the mobile phone 100.
  • the CPU 101 controls the respective units of the mobile phone 100 according to an input signal and various kinds of programs.
  • the control by the CPU 101 includes, for example, a communication control, a recording control, and a display control.
  • the RAM 102 is a rewritable memory, and is used as a work area for a program that controls the mobile phone 100. Further, the RAM 102 is also used as a buffer for various kinds of content data and parameters.
  • the nonvolatile memory 103 stores the program for controlling the mobile phone 100, and data such as image data, text data, and other data.
  • the CPU 101 reads the program from the nonvolatile memory 103, and starts controlling the respective units.
  • the nonvolatile memory 103 is embodied by, for example, a flash memory.
  • the display unit 104 displays, for example, a screen including an image and a graphical user interface (GUI) based on the control by the CPU 101.
  • the display unit 104 includes, for example, a liquid crystal display (LCD) and an LCD driver unit for controlling the LCD.
  • LCD liquid crystal display
  • the operation unit 105 is used to receive an instruction from a user.
  • the operation unit 105 according to the present exemplary embodiment includes a plurality of buttons, and a touch panel mounted on a display surface of the display unit 104.
  • the operation unit 105 notifies the CPU 101 of pressing of a button, coordinate information detected by the touch panel, and the like.
  • the battery 106 is a unit for supplying power that allows the mobile phone 100 to operate.
  • the 3G communication unit 107 is a unit for transmitting and receiving a voice and data between the mobile phone 100 and a mobile communication network (not illustrated).
  • the 3G communication unit 107 includes an antenna for performing wireless communication and a communication controller for processing a wireless signal, and realizes wireless communication according to Wideband Code Division Multiple Access (W-CDMA) (Universal Mobile Telecommunications System (UMTS)).
  • W-CDMA Wideband Code Division Multiple Access
  • UMTS Universal Mobile Telecommunications System
  • the wireless LAN unit 108 is a communication unit for realizing wireless communication in a communication range of approximately dozens of meters. Examples of a specific communication method used thereby include Institute of Electrical and Electronics Engineers (IEEE) 801.11a/b/g/n/ac.
  • the wireless LAN unit 108 includes an antenna for the wireless communication, and a communication controller for processing a wireless signal.
  • the wireless LAN unit 108 is used for communication with a wireless LAN unit 131 of the digital camera 120 that will be described below, and a connection to the AP (not illustrated).
  • the communication by the wireless LAN unit 108 is one example of communication by a first communication method.
  • the power saving wireless communication unit 109 is a communication unit for realizing wireless communication with lower power consumption than the wireless LAN unit 108.
  • short-range communication means wireless communication assumed to be performed within a communication range of approximately several meters to dozens of meters, and examples thereof include Bluetooth (registered trademark) and ZigBee (registered trademark).
  • the power saving wireless communication unit 109 performs communication with extremely low power consumption that is called Bluetooth Low Energy.
  • the communication by the power saving wireless communication unit 109 is one example of communication by a second communication method.
  • This power saving wireless communication unit 109 includes an antenna for the wireless communication, a modulation and demodulation circuit, and a communication controller for processing a wireless signal.
  • the power saving wireless communication unit 109 is used for communication with a power saving wireless communication unit 133 of the digital camera 120 that will be described below.
  • a main CPU 121 controls the entire digital camera 120.
  • the main CPU 121 controls the respective units of the digital camera 120 according to an input signal and various kinds of programs.
  • the control by the main CPU 121 includes, for example, a communication control, a recording control, a display control, and an imaging control.
  • Roles of a RAM 122, a nonvolatile memory 123, an operation unit 124, and a display unit 125 are substantially similar to the mobile phone 100, and therefore descriptions thereof are omitted here.
  • a storage medium interface (I/F) 126 is an interface for mounting a storage medium 127 such as a so-called memory card.
  • the CPU 121 controls reading out data from the storage medium 127 mounted on the storage medium I/F 126, and writing data into this storage medium 127.
  • the storage medium 127 is a rewritable nonvolatile memory for storing captured image data.
  • a Secure Digital (SD) memory card is used as the storage medium 127.
  • An imaging unit 128 includes, for example, an image sensor that converts an optical image of an object into an electric video signal, and outputs the video signal to an internal bus 135.
  • an image sensor that converts an optical image of an object into an electric video signal
  • CMOS complementary metal-oxide semiconductor
  • CCD charge coupled device
  • An image processing unit 129 performs various kinds of image processing on the image data stored in the nonvolatile memory 123 and the storage medium 127, and the video signal output from the imaging unit 128.
  • the CPU 121 may be also able to perform image processing according to a program without use of the image processing unit 129 depending on the type of the image processing.
  • a battery 130 is a unit for supplying power for allowing the digital camera 120 to operate.
  • the battery 130 can supply power to the entire digital camera 120, and can also supply power exclusively to a sub CPU 132, the power saving wireless communication unit 133, and a nonvolatile memory 134 that will be described below.
  • a standby state In such a state in which the battery 130 is supplying power exclusively to the sub CPU 132, the power saving wireless communication unit 133, and the nonvolatile memory 134 (hereinafter referred to as a standby state), the digital camera 120 can maintain power consumption in an extremely low state.
  • a role of the wireless LAN unit 131 is substantially similar to that of the mobile phone 100, and therefore a description thereof is omitted here.
  • the sub CPU 132 controls communication by the power saving wireless communication unit 133 that will be described below, and the digital camera 120 in the standby state.
  • the sub CPU 132 is provided with a built-in memory required for an operation of the sub CPU 132 itself, and therefore can operate even in the standby state in which power is not supplied to the memory 122 and the nonvolatile memory 123.
  • the sub CPU 132 allows the digital camera 120 to communicate with the mobile phone 100 even in the standby state with use of the power saving wireless communication unit 133. Further, the sub CPU 32 can change an operation state of the digital camera 120 in such a manner that power in the battery 130 is supplied so as to allow the entire digital camera 120 to operate, according to a content of communication by the power saving wireless communication unit 133.
  • a role of the power saving wireless communication unit 133 is substantially similar to that of the mobile phone 100, and therefore a description thereof is omitted here.
  • the nonvolatile memory 134 stores a program for controlling the sub CPU 132, and data required for the operation of the sub CPU 132. When power is supplied, the sub CPU 132 reads the program from the nonvolatile memory 134, and starts controlling an operation of the power saving wireless communication unit 133 and communication with the main CPU 121.
  • the nonvolatile memory 134 is embodied by, for example, a flash memory or an electrically erasable programmable read-only memory (EEPROM).
  • Fig. 1 illustrates the sub CPU 132, the power saving wireless communication unit 133, and the nonvolatile memory 134 as if they are configured as separate hardware devices, but they may be realized by being integrated into a single hardware device, like a one-chip microcomputer.
  • Figs. 2A and 2B illustrate an outer appearance of the mobile phone 100.
  • Figs 2A and 2B are a front view and a side view of the mobile phone 100, respectively.
  • a liquid crystal display 201 is equipped with a touch panel, and is included in the operation unit 105 and the display unit 104 illustrated in Fig. 1.
  • the user can, for example, operate a GUI displayed on the liquid crystal display 201 by touching the liquid crystal display 201.
  • An operation button 202 is included in the operation unit 105.
  • the user can not only operate the touch panel, but also, for example, switch a function of the mobile phone 100 and operate a GUI displayed on the display unit 104 by using this button.
  • Volume buttons 203 are included in the operation unit 105. The user can control a volume during voice communication by using these buttons.
  • a power button 204 is included in the operation unit 105. The user can perform an operation of, for example, powering on and off the mobile phone 100 by using this button.
  • Figs. 3A, 3B, and 3C illustrate an outer appearance of the digital camera 120.
  • Figs. 3A, 3B, and 3C are a front view, a back view, and a bottom view of the digital camera 120, respectively.
  • a shutter button 301 is included in the operation unit 124.
  • the shutter button 301 is configured as a switch to be pushed in two steps, which can detect a half pressed state and a fully pressed state while distinguishing them from each other.
  • the digital camera 120 starts an imaging preparation operation such as an automatic focus control.
  • the digital camera 120 starts an imaging operation for capturing still image data.
  • a finder window 302 allows the user to check an image of an object via a finder eyepiece portion 305 that will be described below, when determining a composition at the time of imaging.
  • a flash 303 emits light as necessary during imaging, thereby allowing the digital camera 120 to capture a beautiful still image even under dark circumstances.
  • An imaging lens 304 is included in the imaging unit 128.
  • the finder eyepiece portion 305 allows the user to optically check the image of the object therefrom.
  • a power button 306 is used to power on and off the digital camera 120.
  • a button group 307 is included in the operation unit 124. The user uses these buttons to display a menu of the digital camera 120 and set various kinds of parameters.
  • An LCD 308 is used to determine an imaging range (to determine the composition) before a start of imaging, display an operation menu that will be described below, and reproduce captured video data to display it.
  • the LCD 308 is included in the display unit 125.
  • a screw hole 309 is used to fix a tripod.
  • a battery chamber 310 is also provided, and the user can mount the battery 130 and the storage medium 127 in the battery chamber 310.
  • each apparatus controls the respective units of the apparatus according to the input signal and the program, by which processes illustrated in flowcharts that will be described below are realized.
  • the entire digital camera 120 is placed in an operable state, and the user can change settings of the digital camera 120 by operating the operation unit 124.
  • Bluetooth communication is performed between the mobile phone 100 and the digital camera 120.
  • the mobile phone 100 according to the present exemplary embodiment acts as a Bluetooth central device
  • the digital camera 120 according to the present exemplary embodiment acts as a Bluetooth peripheral device.
  • step S401 the digital camera 120 displays a setting menu screen based on a user's operation or the like.
  • step S402. An operation of the setting menu screen will be described below with reference to the drawings of operation screens illustrated in Figs. 5A to 5E.
  • the digital camera 120 advertises information for starting pairing with use of the power saving wireless communication unit 133 via the sub CPU 132.
  • a CameraPair service for achieving pairing with the digital camera 120 is originally defined by the Generic Attribute (GATT) profile of Bluetooth Low Energy (LE).
  • GATT Generic Attribute
  • LE Bluetooth Low Energy
  • the digital camera 120 advertises the CameraPair service by transmitting an advertising signal of this CameraPair service.
  • the advertising signal of the CameraPair service contains an area where a connection target device (hereinafter referred to as a central device) requesting the initial setting indicates a Central Identification (ID) characteristic, which is ID information for uniquely identifying the central device. Further, the advertising signal of the CameraPair service also contains an area indicating a Status characteristic representing a progress status of the initial setting.
  • ID Central Identification
  • Execution of an authentication process between devices that is called pairing in Bluetooth is a requirement for writing a value into the Central ID characteristic.
  • the advertising signal transmitted in step S402 has a NULL value set in the Central ID characteristic, and a character string "Initializing" set in the Status characteristic. This Bluetooth advertisement is automatically repeated by the power saving wireless communication unit 133 until a stop instruction is explicitly issued.
  • step S403 the power saving wireless communication unit 133 determines whether a request to write a value into the Central ID characteristic is issued from the central device in response to the advertisement started in step S402. This request corresponds to a request issued in step S605 in a process by the mobile phone 100, which will be described below. If no request is issued (NO in step S403), the determination in step S403 is repeated until a request is issued. If a predetermined writing request is issued (YES in step S403), the processing proceeds to step S404 and subsequent steps.
  • a process from steps S404 to S408 is a pairing process defined by the standard Bluetooth protocol.
  • the CameraPair service according to the present exemplary embodiment requires pairing for writing a value into the Central ID characteristic. Therefore, in step S404, the power saving wireless communication unit 133 determines whether the central device, which has issued the writing request, is already paired with the digital camera 120 as Bluetooth pairing. If the central device is already paired with the digital camera 120 (YES in step S404), the central device can successfully write a value into the Central ID characteristic, and therefore the processing directly proceeds to step S409. If the central device is not paired with the digital camera 120 yet (NO in step S404), in step S405, the power saving wireless communication unit 133 transmits a pairing request to the central device.
  • step S406 the main CPU 121 displays a personal identification number (PIN) confirmation screen on the display unit 125.
  • PIN personal identification number
  • step S407 the power saving wireless communication unit 133 determines whether a PIN number is received from the central device. This reception of a PIN number corresponds to transmission performed in step S608 in the process by the mobile phone 101, which will be described below. If no PIN number is received (NO in step S407), the determination in step S407 is repeated until a PIN number is received.
  • step S407 the power saving wireless communication unit 133 determines whether the received PIN number matches the PIN number created in step S406. If the received PIN number does not match the PIN number created in step S406 (NO in step S408), the processing returns to step S405, in which the power saving wireless communication unit 133 retransmits a pairing request. If the received PIN number matches the PIN number created in step S406 (YES in step S408), the processing proceeds to step S409.
  • step S409 the power saving wireless communication unit 133 stores the value of the Central ID of the CameraPair service into the nonvolatile memory 134 via the sub CPU 132. After that, in step S410, the power saving wireless communication unit 133 notifies the central device that the initial setting is completed. More specifically, the power saving wireless communication unit 133 sets "Success" as the value of the Status characteristic of the CameraPair service in the advertisement, thereby allowing the central device that has received the advertisement to determine that the initial setting is completed.
  • step S411 the main CPU 121 displays a pairing completion screen on the display unit 125.
  • An operation of the pairing completion screen will be described below with reference to the drawings of the operation screens illustrated in Figs. 5A to 5E.
  • step S412 the power saving wireless communication unit 133 stops the advertisement of the Bluetooth CameraPair service that has been started in step S402. Then, the processing is ended.
  • the user performs the following operations to select the pairing setting menu in step S401.
  • the user displays a setting top screen of the digital camera 120 illustrated in Fig. 5A by operating the operation unit 307.
  • a screen for setting a connection to a mobile phone is displayed as illustrated in Fig. 5B.
  • a screen for pairing the digital camera 120 with a mobile phone is displayed as illustrated in Fig. 5C.
  • the user selects an "ADD NEW MOBILE PHONE" menu item 521 on this screen for pairing the digital camera 120 with a mobile phone.
  • the user performs the above-described operation to select the pairing setting menu in step S401.
  • Fig. 5D illustrates the PIN confirmation screen displayed in step S406.
  • the user does not have to perform any operation on the digital camera 120 on this PIN confirmation screen.
  • An input of a PIN code 531 displayed on the PIN confirmation screen into the mobile phone 100 results in accomplishment of pairing. Then, the processing proceeds to step S407 and the subsequent steps.
  • Fig. 5E illustrates the pairing completion screen displayed in step S412. A user's selection of an OK button 541 on this pairing completion screen terminates the Bluetooth advertisement in step S412, thereby ending the entire processing illustrated in Fig. 4.
  • the operation of the digital camera 120 when the initial setting is configured to allow the mobile phone 100 and the digital camera 120 to communicate with each other via the power saving wireless communication, and the operation that the user performs on the digital camera 120 at this time have been described.
  • a flowchart illustrated in Fig. 6 Assume that, before a start of the present flowchart, an application for communicating with the digital camera 120 is activated on the mobile phone 100 by the user. When this setting is performed, Bluetooth communication is performed between the mobile phone 100 and the digital camera 120.
  • the mobile phone 100 acts as the Bluetooth central device
  • the digital camera 120 acts as the Bluetooth peripheral device.
  • step S601 the mobile phone 100 displays a setting menu screen, and waits for a user's selection of a pairing setting menu. Then, the processing proceeds to step S602.
  • An operation of the setting menu screen will be described below with reference to the drawings of operation screens illustrated in Figs. 7A to 7D.
  • step S602 the mobile phone 100 displays a pairing executing screen, and then the processing proceeds to step S603.
  • the power saving wireless communication unit 109 receives an advertisement from the Bluetooth peripheral device.
  • step S604 the power saving wireless communication unit 109 determines whether the received advertisement contains the CameraPair service. If no advertisement is received in step S603 (NO in step S603), or if the received advertisement is not the CameraPair service (NO in step S604), the reception in step S603 and the determination in S604 are repeated until the advertisement of the CameraPair service is received.
  • step S605 If the advertisement of the CameraPair service is received (YES in steps S603 and S604), the processing6 proceeds to step S605.
  • the advertisement of the CameraPair service received at this time corresponds to the above-described advertisement transmitted from the digital camera 120 in step S402.
  • step S605 the power saving wireless communication unit 109 creates a unique ID that allows an individual device as the mobile phone 100 to be identified, and issues a request to write the created ID into the Central ID characteristic of the CameraPair service.
  • the Central ID characteristic of the CameraPair service is set so as to require the authentication process between devices that is called pairing in Bluetooth to allow the central device to write a value therein. Therefore, the pairing process is performed as will be described in steps S606 to S608.
  • This process is the pairing process defined by the standard Bluetooth protocol.
  • the power saving wireless communication unit 109 determines whether a pairing request is received from the peripheral device. This pairing request corresponds to the above-described pairing request transmitted in step S405 illustrated in Fig. 4. This request is transmitted only when the power saving wireless communication unit 109 is not yet paired with the peripheral device advertising the Central ID characteristic as Bluetooth pairing.
  • step S606 the mobile phone 100 displays a PIN input screen on the display unit 104. An operation performed on the PIN input screen will be described below with reference to the drawings of the operation screens illustrated in Figs. 7A to 7D.
  • step S608 the power saving wireless communication unit 109 transmits the input PIN number to the peripheral device. In response to this transmission, the digital camera 120 determines whether the received PIN number matches the created PIN number in steps S407 and S408 as already described above.
  • the power saving wireless communication unit 109 determines whether a pairing completion notification is received. More specifically, the power saving wireless communication unit 109 determines whether the value of the Status characteristic of the CameraPair service is set to "Success".
  • the pairing completion notification corresponds to the above-described notification in step S410 in the process by the digital camera 120, and is a notification transmitted when the PIN number transmitted in step S608 matches the PIN number created in step S406 of the digital camera 120. Therefore, if the pairing completion notification cannot be received (NO in step S609), the power saving wireless communication unit 109 determines that the input PIN number is incorrect, and the determination in step S606 is repeated.
  • step S610 the mobile phone 100 displays a pairing completion screen on the display unit 104.
  • An operation of the pairing completion screen will be described below with reference to the drawings of the operation screens illustrated in Figs. 7A to 7D.
  • the pairing completion screen is closed, the entire processing illustrate in Fig. 6 is ended.
  • Fig. 7A illustrates the pairing executing screen displayed on the liquid crystal display 201 in step S602.
  • a message 711 which prompts the user to start up the digital camera 120 in a pairing mode, is displayed on the pairing executing screen, but the user does not have to perform any operation on the mobile phone 100 on this pairing executing screen. Instead, the user has to start up the digital camera 120 in the pairing mode as instructed. This operation has been already described as step S401. As a result, the pairing process starts, and the processing proceeds to step S603 and the subsequent steps.
  • Fig. 7C illustrates the PIN input screen displayed in step S607.
  • the user selects a pairing execution button 723.
  • the display in step S607 is ended, and the processing proceeds to step S608 and the subsequent steps.
  • Fig. 7D illustrates the pairing completion screen displayed in step S610.
  • a user's selection of an OK button 732 on this pairing completion screen ends the display in step S610, thereby ending the entire processing illustrated in Fig. 6.
  • the digital camera 120 can switch whether to stop a power supply to the entire digital camera 120 or shift to the standby state. More specifically, the digital camera 120 can switch whether to be set so as to be able to receive communication from the mobile phone 100 by the power saving wireless communication unit 133 according to a setting. Now, this setting will be described in detail with reference to Figs. 8A to 8C.
  • Fig. 8A illustrates the setting top screen displayed on the display unit 125 by a user's operation performed on the operation unit 307.
  • a "MOBILE PHONE CONNECTION SETTINGS” menu item 802 from a displayed setting item list 801 on this setting top screen
  • the screen for setting a connection to a mobile phone is displayed as illustrated in Fig. 8B.
  • a "SET STARTUP FROM MOBILE PHONE" menu 812 from a displayed setting item list 811 on the screen for setting a connection to a mobile phone
  • a screen for setting a startup from a mobile phone is displayed as illustrated in Fig. 8C.
  • an "ENABLE” menu 821 and a “DISABLE” menu 822 are displayed on the screen for setting a startup from a mobile phone. If the user selects the "ENABLE” menu 821, the digital camera 120 is placed into the standby state when the power button 306 is turned off, and is set so as to be able to exit the standby state by communication from the mobile phone 100. If the user selects the "DISABLE” menu 822, the digital camera 120 stops power supply to the entire digital camera 120 when the power button 306 is turned off, and is not powered on even by communication from the mobile phone 100.
  • step S901 the sub CPU 132 determines whether the built-in nonvolatile memory 134 mounted in the sub CPU 132 itself stores one or more Central ID information piece(s) of a Bluetooth device or Bluetooth devices which the digital camera 120 is already paired with.
  • step S901 If there is any stored Central ID (YES in step S901), the processing proceeds to step S902. If there is no stored Central ID (NO in step S901), the present flowchart is ended.
  • the sub CPU 132 advertises information regarding the digital camera 120 with use of the power saving wireless communication unit 133. More specifically, the digital camera 120 according to the present exemplary embodiment originally defines a CameraView service for sharing an image by the GATT profile of Bluetooth LE. In step S902, the sub CPU 132 advertises this CameraView service.
  • An advertising signal of the CameraView service contains an area indicating a CameraName characteristic specifying the name of the digital camera 120 broadcasting the advertisement. Further, the advertising signal of the CameraView service contains an area indicating a CameraMAC characteristic specifying a media access control (MAC) address of the wireless LAN 131 unit of the digital camera 120.
  • MAC media access control
  • the advertising signal of the CameraView service contains an area indicating a MAC characteristic into which a Bluetooth device as a connection target that will select and store a shared image (hereinafter referred to as a central device) writes a wireless LAN MAC address.
  • the MAC characteristic is set so as to require the authentication process between devices that is called pairing in Bluetooth to allow the central device to write a value therein.
  • the sub CPU 132 broadcasts the advertisement with a NULL value set in the MAC characteristic.
  • This Bluetooth advertisement is automatically repeated by the power saving wireless communication unit 133 until a stop instruction is explicitly issued.
  • the advertisement transmitted in this step corresponds to a signal received in step S1002 that will be described below.
  • step S903 the sub CPU 132 determines whether a request to write a value into the MAC characteristic of the CameraView service is issued to the power saving wireless communication unit 133.
  • the sub CPU 132 repeats the determination in this step until a predetermined writing request signal is received (NO in step S903). If the predetermined writing request signal is received (YES in step S903), the processing proceeds to step S904.
  • the writing request signal received in this step corresponds to a signal transmitted in step S1007 that will be described below.
  • step S904 the sub CPU 132 determines whether the writing request signal received in step S903 is transmitted from a Bluetooth device which the digital camera 120 is already paired with. The sub CPU 132 makes this determination based on whether the Central ID of the central device that has issued the writing request is stored in the nonvolatile memory 134, i.e., whether this central device is the central device set by the initial setting illustrated in Fig. 4. If the writing request signal is transmitted from a Bluetooth device which the digital camera 120 is already paired with (YES in step S904), the sub CPU 132 stores the value of the MAC characteristic of the CameraView service into the nonvolatile memory 134. After that, the processing proceeds to step S905. If the writing request signal is transmitted from a Bluetooth device which the digital camera 120 is not paired with (NO in step S904), the processing returns to step S903 so that the sub CPU 132 can receive a writing request.
  • step S905 the sub CPU 132 stops the advertisement started in step S902.
  • step S906 the sub CPU 132 controls the battery 130 in such a manner that power is supplied to the entire digital camera 120 including the main CPU 121.
  • step S907 the main CPU 121 controls the wireless LAN unit 131 in such a manner that the wireless LAN unit 131 becomes ready for wireless LAN communication. Communication of the digital camera 120 after that is performed by control of the wireless LAN unit 131 by the main CPU 121. At this time, the wireless LAN unit 131 does not establish communication (association) with another communication apparatus such as an AP.
  • step S908 the main CPU 121 enables a notification of information about a service in an application layer that the digital camera 120 provides, to a communication apparatus in a neighborhood reachable by radio waves of the wireless LAN.
  • the digital camera 120 provides an image data providing service as the service in the application layer.
  • the main CPU 121 creates a unique notification ID in the digital camera 120 with use of a random number or the like when enabling the service information notification.
  • This notification ID will be contained in a session start request received in step S909 that will be described below.
  • the main CPU 121 can determine which service information notification corresponds to an issued session start request by confirming the notification ID contained in the session start request when determining whether to permit the session start request (step S910 that will be described below). For example, in a case where the digital camera 120 provides a plurality of services at the same time, the digital camera 120 allows a session start request to be issued to an appropriate service by assigning different notification IDs to notifications of information about the respective services.
  • This notification ID is stored in the memory 122 until stopping the service information notification in step S914 that will be described below.
  • the wireless LAN unit 131 carries out the service information notification by returning a probe response frame when the service in the application layer is searched for by a probe request frame, which is one type of management frame.
  • the probe request frame contains, for example, information indicating a service in the application layer that is requested to be searched for, a MAC address of a communication apparatus that is a target requested to be searched for, and a MAC address of a communication apparatus that is carrying out the search.
  • a MAC address of a specific communication apparatus may be specified as the MAC address of the communication apparatus that is the target requested to be searched for, and a value representing an arbitrary communication apparatus may be also specified as this MAC address.
  • a specific MAC address is specified, only a communication apparatus having this MAC address responds to this probe request frame.
  • the probe response frame contains a MAC address of a response transmission source, a notification ID, additional information about the service, and the like.
  • step S908 the main CPU 121 continues the notification of the information about the provided service via the wireless LAN until stopping this notification in step S914 that will be described below.
  • the CPU 121 carries out the service information notification with use of the probe response frame in response to a search for the service with use of the probe request frame as needed.
  • the probe request frame received in this step is a signal transmitted in step S1010 (described below), and the probe response frame returned in step S908 corresponds to a signal received in step S1011 (described below).
  • step S909 the main CPU 121 waits for a session start request for establishing a logical connection to the service provided by the digital camera 120.
  • the main CPU 121 also uses the management frame defined by IEEE 802.11 to receive the session start request.
  • the main CPU 121 waits for reception of the session start request as an action frame, which is one type of management frame.
  • This action frame used for the session start request contains a MAC address of a transmission source of the session start request as data thereof.
  • step S909 If this session start request is received (YES in step S909), the processing proceeds to step S910.
  • the action frame received in this step corresponds to a signal transmitted in step S1012 that will be described below.
  • step S910 the main CPU 121 determines whether to permit a session start with use of the MAC address received in step S903 and the notification ID created in step S908. More specifically, the main CPU 121 reads out the MAC address received in step S903 from the nonvolatile memory 134 via the sub CPU 132. Then, the main CPU 121 permits the session start only when this MAC address matches the MAC address of the transmission source of the session start request received in step S909, and the notification ID created in step S908 matches the notification ID received in step S910.
  • step S910 If the session start is permitted (YES in step S910), the processing proceeds to step S912. If the session start is not permitted (NO in step S910), the processing i proceeds to step S911.
  • Step S911 is performed when the session start request is not permitted.
  • the main CPU 121 returns data indicating a rejection of the session start to the communication apparatus that is the request source of the session start as an action frame.
  • step S909 the main CPU 121 waits for a next session start request.
  • the action frame returned in this step corresponds to a signal determined in step S1013 that will be described below.
  • Step S912 is performed when the session start request is permitted.
  • the main CPU 121 returns data indicating permission for the session start to the communication apparatus that is the request source of the session start as an action frame.
  • the content of the return may contain information regarding the service in the application layer.
  • the return may contain information about a protocol used in the application layer, such as Picture Transfer Protocol Over TCP/IP Network (PTP-IP).
  • PTP-IP Picture Transfer Protocol Over TCP/IP Network
  • the action frame returned in this step corresponds to a signal determined in step S1014 that will be described below.
  • step S913 the main CPU 121 establishes a session with the communication apparatus that has requested the session start.
  • the main CPU 121 performs processing based on the specification of the Wireless Fidelity (Wi-Fi) Direct protocol to determine roles in a wireless layer, i.e., which communication apparatus serves as a wireless LAN access point, and which communication apparatus serves as a wireless LAN station between the communication apparatuses.
  • Wi-Fi Wireless Fidelity
  • a communication apparatus that carries out the wireless LAN access point function is referred to as a peer-to-peer (P2P) group owner (hereinafter referred to as a GO), and a communication apparatus that carries out the wireless LAN station function is referred to as a P2P client (hereinafter referred to as a CL).
  • P2P peer-to-peer
  • CL P2P client
  • the completion of this step results in establishment of a logical connection between the communication apparatus that has requested the session start and the digital camera 120.
  • the completion of this step allows an application of this communication apparatus to communicate with the service in the application layer that the digital camera 120 provides by TCP/IP and User Datagram Protocol (UDP)/IP.
  • TCP/IP Transmission Control Protocol
  • UDP User Datagram Protocol
  • the establishment of the session in this step corresponds to that in step S1015 that will be described below.
  • step S914 the main CPU 121 disables the notification of the information about the service in the application layer that has been enabled in step S908. Therefore, after this step, the main CPU 121 does not respond to a probe request frame for searching for the service. Further, the main CPU 121 also deletes the notification ID stored in the RAM 122 in step S908.
  • step S915 the main CPU 121 starts the application for realizing the service in the application layer that has been notified of in step S908.
  • the main CPU 121 starts a responder function of PTP-IP, which causes the main CPU 121 to operate according to a PTP-IP packet received as TCP/IP data and a PTP command contained therein thereafter.
  • step S916 the main CPU 121 determines whether a command issued to the service in the application layer that has been started in step S915 is received.
  • the main CPU 121 determines whether the received TCP/IP data is a PTP-IP packet. If the received TCP/IP data is a PTP-IP packet (YES in step S916), the processing proceeds to step S917. If the received TCP/IP data is not a PTP-IP packet (NO in step S916), the processing proceeds to step S918.
  • the PTP-IP packet received in this step corresponds to a PTP-IP packet transmitted in each of steps S1017, S1019 (described below).
  • step S917 the main CPU 121 operates according to the received PTP-IP packet and a PTP command contained therein.
  • the main CPU 121 when the main CPU 121 receives a PTP command for acquiring a thumbnail of specified image data, the main CPU 121 creates thumbnail data from this image data stored in the storage medium 127, and returns the created thumbnail data as a PTP response. Similarly, when the main CPU 121 receives a PTP command for acquiring image data, the main CPU 121 reads a part or whole of this image data stored in the storage medium 127 into the memory 122, and returns this data as a PTP response.
  • step S918 the main CPU 121 determines whether a request for disconnecting the session established in step S913 is issued. This session disconnection request is issued by transmitting and receiving TCP or UDP data with use of a predetermined port number.
  • step S918 If the session disconnection request is issued (YES in step S918), the processing proceeds to step S919. If no session disconnection request is issued (NO in step S918), the processing returns to step S916, in which the main CPU 121 waits for a next PTP-IP packet.
  • step S919 the main CPU 121 ends the session established in step S913. More specifically, the main CPU 121 performs processing based on the specification of the Wi-Fi Direct protocol to terminate the association and end the role as the GO or the CL.
  • step S920 the main CPU 121 stops the software for realizing the service in the application layer that has been started in step S915.
  • step S921 the main CPU 121 controls the wireless LAN unit 131 in such a manner that the wireless LAN unit 131 becomes unable to perform any wireless LAN communication.
  • step S922 the main CPU 121 instructs the sub CPU 132 to shift to the standby state, and then stops all processes.
  • the sub CPU 132 controls the battery 130 to supply power exclusively to the sub CPU 132, the power saving wireless communication unit 133, and the nonvolatile memory 123, thereby placing the digital camera 120 into the standby state.
  • step S902 the processing returns to step S902, in which the sub CPU 132 restarts the Bluetooth advertisement to wait for a start of a next connection process. This is the operation of the digital camera 120.
  • the wireless LAN unit 108 of the mobile phone 100 is placed in a communicable state.
  • the wireless LAN unit 108 may be connected with another communication apparatus (a session is started with another communication apparatus), or may not be connected with any communication apparatus.
  • the application which communicates with the digital camera 120 to acquire image data, is installed in the mobile phone 100 in advance.
  • step S1001 the CPU 101 waits until the application for acquiring an image is activated by the user.
  • the user operates the operation unit 105 to instruct the mobile phone 100 to activate the application.
  • step S1001 If the application for acquiring an image is activated (YES in step S1001), the processing proceeds to step S1002.
  • step S1002 the CPU 101 controls the power saving wireless communication unit 109 to receive a signal transmitted from another communication apparatus as an advertisement.
  • the advertisement received in this step corresponds to the above-described signal transmitted in step S902.
  • step S1002 If an advertisement is received (YES in step S1002), the processing proceeds to step S1003.
  • step S1003 the CPU 101 determines whether the advertisement received in step S1002 contains the CameraView service.
  • step S1003 If the advertisement of the CameraView service is received (YES in step S1003), the processing proceeds to step S1004. If the received advertisement does not contain the CameraView service (NO in step S1003), the processing returns to step S1002, in which the CPU 101 waits for reception of a next advertisement.
  • step S1004 the CPU 101 displays a communication apparatus that has transmitted the advertisement received in step S1002 and determined to contain the CameraView service in step S1003 on a discovered camera screen on the display unit 104 as a detected camera. An operation of the discovered camera screen will be described below with reference to Fig. 11B.
  • step S1005 the CPU 101 determines whether any of detected cameras is selected by the user. More specifically, the CPU 101 determines whether any (for example, an area 1112) of areas where camera names are displayed is touched by the user with a GUI displayed on the liquid crystal display 201 equipped with the touch panel as illustrated in Fig. 11B.
  • step S1005 If a camera name is touched (YES in step S1005), the processing proceeds to step S1006. If no camera name is touched (NO in step S1005), the processing returns to step S1002, in which the CPU 101 waits for reception of a next advertisement.
  • step S1006 the CPU 101 changes the display of the display unit 104 to a Bluetooth connection establishing screen.
  • An operation of the Bluetooth connection establishing screen will be described below with reference to Fig. 11C.
  • step S1007 the CPU 101 writes the MAC address of the mobile phone 100 itself into the MAC characteristic of the CameraView service advertised by the camera selected by the user in step S1005 with use of the power saving wireless communication unit 109.
  • step S1008 the CPU 101 determines whether the CPU 101 has succeeded in writing the MAC address by Bluetooth in step S1007.
  • step S1008 If the CPU 101 has succeeded in writing the MAC address (YES in step S1008), the processing proceeds to step S1009. If the CPU 101 has failed in writing the MAC address (NO in step S1008), the processing proceeds to step S1024.
  • the writing request signal transmitted in this step corresponds to the above-described signal received in step S903.
  • Communication of the mobile phone 100 thereafter is performed by control of the wireless LAN unit 108 by the CPU 101.
  • step S1009 the CPU 101 changes the display of the display unit 104 to a wireless LAN connection establishing screen.
  • An operation of the wireless LAN connection establishing screen will be described below with reference to Fig. 11D.
  • step S1010 the CPU 101 searches for a service in the application layer that a communication apparatus provides in a neighborhood reachable by radio waves of the wireless LAN with use of the management frame defined by IEEE 802.11.
  • the CPU 101 searches for a service by transmitting a probe request frame, which is one type of management frame.
  • the probe request frame contains information indicating a service in the application layer that is requested to be searched for, a detailed condition of the service in the application layer, a MAC address of a communication apparatus that is a target requested to be searched for, and a MAC address of the communication apparatus that is carrying out the search.
  • the image data providing service is specified as the service requested to be searched for, and a MAC address corresponding to the camera selected by the user in step S1005 is specified as the MAC address of the communication apparatus that is the target requested to be searched for.
  • the MAC address of this camera can be acquired from the CameraMAC characteristic of the CameraView service in the advertisement received in step S1002.
  • the probe request frame transmitted in this step corresponds to the above-described signal received in step S908.
  • step S1011 the CPU 101 determines whether a probe response frame is returned in response to the probe request frame transmitted in step S1010, and whether this response is a response regarding the desired service.
  • the probe response frame contains a MAC address of a communication apparatus that returns the probe response frame, additional information about the service, a notification ID, and the like, thereby allowing the CPU 101 to determine whether this response is a response regarding the desired service.
  • step S1011 If no probe response frame is received during a predetermined time period, or the probe response frame does not contain the desired service (NO in step S1011), the processing returns to step S1010. On the other hand, if a probe response frame is received, and this probe response frame is a response regarding the desired service (YES in step S1011), the CPU 101 determines that a communication apparatus having the service requested to be searched for is detected, and then the processing proceeds to step S1012.
  • the probe response frame received in this step corresponds to the above-described signal transmitted in step S908.
  • step S1012 the CPU 101 requests a session start for establishing a logical connection to the communication apparatus detected in step S1011.
  • the CPU 101 also transmits the session start request with use of the management frame defined by IEEE 802.11.
  • the CPU 101 transmits the session start request as an action frame, which is one type of management frame.
  • This action frame for the session start request contains the MAC address of the transmission source transmitting the session start request, and the notification ID acquired from the probe response frame received in step S1011 as data thereof.
  • the action frame transmitted in this step corresponds to the above-described signal received in step S909.
  • step S1013 the CPU 101 determines whether a response to the session start request transmitted in step S1012 is an action frame containing data indicating a rejection of the session start. If the response is an action frame indicating a rejection of the session start (YES in step S1013), the processing proceeds to step S1024. If the response is not this action frame (NO in step S1013), the processing proceeds to step S1014.
  • the action frame determined in this step corresponds to the above-described signal transmitted in step S911.
  • step S1014 the CPU 101 determines whether the response to the session start request transmitted in step S1012 is an action frame containing data indicating permission for the session start.
  • this received action frame may contain information regarding the service in the application layer.
  • the received action frame may contain information about a protocol to be used, such as PTP-IP.
  • step S1014 If the received response is an action frame indicating permission for the session start (YES in step S1014), the processing proceeds to step S1015. If the received response is not this action frame (NO in step S1014), the processing returns to step S1012, in which the CPU 101 requests a session start again.
  • the action frame determined in this step corresponds to the above-described signal transmitted in step S912.
  • step S1015 the CPU 101 establishes a session with the communication apparatus that has returned the permission for the session start (i.e., the camera selected in step S1005).
  • the establishment of the session in this step is similar to the above-described establishment of the session in step S913, and therefore a description thereof is omitted here.
  • the CPU 101 constructs a new session in this step.
  • step S1005 The completion of this step results in establishment of a logical connection between the mobile phone 100 and the digital camera selected by the user in step S1005.
  • step S1001 the completion of this step allows the application activated in step S1001 to communicate with the service in the application layer that the above-described selected digital camera provides, by TCP/IP and UDP/IP.
  • step S1016 the CPU 101 changes the display of the display unit 104 to a GUI supposed to be displayed when the establishment of the connection is completed.
  • Fig. 11F illustrates an example of the GUI displayed in step S1016.
  • the name of the camera selected by the user in step S1005 is displayed in a message 1151, which allows the user to recognize that the process for establishing the connection via the wireless LAN is completed.
  • step S1017 When the user selects (taps) a button 1152, the processing proceeds to step S1017.
  • step S1017 the CPU 101 transmits a PTP command for acquiring thumbnail data with use of PTP-IP to the camera with which the session is established, and displays a GUI that allows the user to select an image to be acquired with use the acquired thumbnail data.
  • the PTP-IP packet for acquiring thumbnail data that is transmitted and received in this step corresponds to the above-described PTP-IP packet received and transmitted in steps S916 and S917.
  • Fig. 11G illustrates an example of the GUI displayed in step S1017.
  • the thumbnail data acquired from the camera is displayed as a list in an area 1162.
  • a mark indicating a data acquisition target is displayed while being superimposed on the tapped thumbnail. For example, tapping a thumbnail 1164 results in a display of a mark labeled 1165.
  • step S1018 the CPU 101 determines whether storage of an image is selected on the GUI displayed in step S1017 by an operation performed on the operation unit 105.
  • the CPU 101 determines that storage of an image is selected when a "SAVE" button 1163 is tapped on the screen illustrated in Fig. 11G.
  • step S10128 If storage of an image is selected (YES in step S1018), the processing proceeds to step S1019. If storage of an image is not selected (NO in step S1018), the processing proceeds to step S1021.
  • step S1019 the CPU 101 transmits a PTP command for acquiring image data to each thumbnail selected as a storage target on the screen illustrated in Fig. 11G with use of PTP-IP, thereby acquiring image data body represented by each thumbnail.
  • the PTP-IP packet transmitted and received in this step corresponds to the above-described PTP-IP packet received and transmitted in steps S916 and S917.
  • step S1020 the CPU 101 updates the GUI screen, thereby notifying the user that the image acquisition is completed. More specifically, the CPU 101 deletes the mark 1165 indicating the data acquisition target illustrated in Fig. 11G.
  • step S1021 the CPU 101 determines whether an instruction to end the image acquisition application is issued.
  • the CPU 101 determines that an end instruction is issued when a "CLOSE" button 1161 is tapped on the screen illustrated in Fig. 11G.
  • step S1021 If an end instruction is issued (YES in step S1021), the processing proceeds to step S1022. If no end instruction is issued (NO in step S1021), the processing returns to step S1017, in which the CPU 101 continues the selection of an image to be acquired.
  • step S1022 the CPU 101 ends the session established in step S1015.
  • the CPU 101 performs the process based on the specification of the Wi-Fi Direct protocol to terminate the association and end the role as the GO or the CL.
  • step S1023 the CPU 101 ends the process for the connection to the camera that has been started in step S1001, and then the present flowchart is ended.
  • step S1024 is performed when the connection establishing process has failed in any of steps S1008 and S1013, and the CPU 101 displays a connection establishment failure screen indicating that the establishment of the connection has failed.
  • An operation of the connection establishment failure screen will be described below with reference to Fig. 11E.
  • step S1001 the user selects a "CONNECT TO CAMERA" button 1101 from the displayed operation buttons on the top screen of the application illustrated in Fig. 11A to perform an operation for the connection to the digital camera, which causes the processing to proceed to the reception of the advertisement in step S1002.
  • a subsequently displayed screen is the discovered camera screen displayed in step S1004 that is illustrated in Fig. 11B.
  • Peripheral devices advertising the CameraView service that are received by a repetition of the process from steps S1002 to S1005 until this time are displayed as a list in a camera list area 1111 on this screen.
  • Character strings each acquired from the CameraName characteristic of the CameraView service are displayed in the camera list area 1111.
  • the processing proceeds from step S1005 to S1006, in which the Bluetooth connection establishing screen illustrated in Fig. 11C is displayed. Further, in step S1009, the wireless LAN connection establishing screen illustrated in Fig. 11D is displayed.
  • the user does not have to perform any operation on the mobile phone 100 on the Bluetooth connection establishing screen and the wireless LAN connection establishing screen, and only has to wait for completion of the connection establishing process according to a display of a message 1121 or a message 1131.
  • the name of the camera selected by the user in step S1005 and the ongoing execution for the Bluetooth connection are displayed in the message 1121 on the Bluetooth connection establishing screen, which allows the user to recognize that the Bluetooth connection establishing process is ongoing.
  • the name of the camera selected by the user in step S1005 and the ongoing execution for the wireless LAN connection are displayed in the message 1131 on the wireless LAN connection establishing screen, which allows the user to recognize that the wireless LAN connection establishing process is ongoing.
  • connection establishment failure screen illustrated in Fig. 11E is displayed in step S1024.
  • the user follows an instruction indicated by a message 1141 and selects an OK button 1142, which causes the processing to proceed to step S1023, leading to the end of the operation for the connection to the camera.
  • Fig. 11F illustrates the connection establishment completion confirmation screen displayed in step S1016.
  • the user selects the OK button 1152 on this screen, which causes the processing to proceed to step S1017.
  • Fig. 11G illustrates the image selection screen displayed in step S1017.
  • the "CLOSE” button 1161, the thumbnail list 1162, and the “SAVE” button 1163 are displayed on the image selection screen.
  • the end instruction is issued in step S1021 (YES in step S1021), and then the processing proceeds to step S1022.
  • Thumbnails of images stored in the digital camera 120 are displayed as a list in the thumbnail list 1162.
  • the selection icon 1165 is displayed on the thumbnail 1164.
  • a plurality of selection icons 1165 can be also displayed by selecting a plurality of images from the images displayed in the thumbnail list 1162.
  • the selection icon 1165 can be also deleted by reselecting an image with the selection icon 1165 already displayed thereon.
  • the processing proceeds from step S1018 to step S1019, in which the image data acquisition in step S1019 is performed on the selected image.
  • the selection icon 1165 is deleted from the thumbnail of the image stored in step S1019.
  • the digital camera 120 is configured to determine whether an apparatus requesting wireless LAN communication is an apparatus with which the digital camera 120 has performed Bluetooth communication, before further constructing a wireless LAN network after performing the Bluetooth communication. This can prevent the digital camera 120 from constructing an unnecessary network.
  • the user can transmit an image from the digital camera 120 to the mobile phone 100 by operating only the mobile phone 100. Therefore, when the user wants to transmit an image, the user does not have to take out and operate both the digital camera 120 and the mobile phone 100.
  • a second exemplary embodiment is different from the first exemplary embodiment in terms of the processes illustrated in Figs. 9 and 10.
  • the present exemplary embodiment will be described mainly focusing on differences from the first exemplary embodiment.
  • steps S1201 to S1208 are similar to that in steps S901 to S908 illustrated in Fig. 9. Therefore, the present flowchart will be described, starting from step S1209.
  • step S1209 the main CPU 121 updates a value of a connection key characteristic of Bluetooth via the sub CPU 131.
  • the value of the connection key characteristic is the notification ID created in step S1208.
  • the value of the connection key characteristic of Bluetooth contains the CameraMAC characteristic of Bluetooth.
  • the main CPU 121 may update the value of the connection key characteristic while setting a combination of the notification ID and the MAC address as the connection key characteristic in this step.
  • a communication apparatus capable of performing Bluetooth communication with the digital camera 120 can acquire the value of this connection key characteristic with use of a request to read out a characteristic in Bluetooth. More specifically, the communication apparatus reads out this value in step S1309.
  • step S1210 the main CPU 121 waits for a session start request for establishing a logical connection to the service provided by the digital camera 120.
  • the main CPU 121 also uses the management frame defined by IEEE 802.11 to receive the session start request.
  • the main CPU 121 waits for reception of the session start request as an action frame, which is one type of management frame.
  • This action frame used for the session start request contains a MAC address of a transmission source of the session start request, and a notification ID corresponding to a notification of information about a service with which the transmission source wants to start a session as data thereof.
  • step S1210 If this session start request is received (YES in step S1210), the processing proceeds to step S1211.
  • the action frame received in this step corresponds to a signal transmitted in step S1312 that will be described below.
  • step S1211 the main CPU 121 determines whether to permit a session start with use of the MAC address received in step S1203 and the notification ID created in step S1208. More specifically, the main CPU 121 permits the session start only when the MAC address read out from the nonvolatile memory 134 via the sub CPU 132 matches the MAC address of the transmission source of the session start request received in step S1210, and the notification ID created in step S1208 matches the notification ID received in step S1210.
  • step S1211 If the session start is permitted (YES in step S1211), the processing proceeds to step S1213. If the session start is not permitted (NO in step S1211), the processing proceeds to step S1212.
  • Processing in step S1212 is performed when the session start request is not permitted.
  • the main CPU 121 returns data indicating a rejection of the session start to the communication apparatus that is the request source of the session start as an action frame.
  • step S1210 the main CPU 121 waits for a next session start request.
  • the action frame returned in this step corresponds to a signal determined in step S1313 that will be described below.
  • Processing in step S1213 is performed when the session start request is permitted.
  • the main CPU 121 returns data indicating permission for the session start to the communication apparatus that is the request source of the session start as an action frame.
  • the content of the return may contain information regarding the service in the application layer.
  • the return may contain information about a protocol used in the application layer, such as PTP-IP.
  • the action frame returned in this step corresponds to a signal determined in step S1314 that will be described below.
  • step S1214 the main CPU 121 establishes a session with the communication apparatus that has requested the session start.
  • the main CPU 121 performs the processing based on the specification of the Wi-Fi Direct protocol to determine the roles in the wireless layer, i.e., which communication apparatus serves as the wireless LAN access point, and which communication apparatus serves as the wireless LAN station between the communication apparatuses.
  • the communication apparatus that carries out the wireless LAN access point function is referred to as the P2P GO, and the communication apparatus that carries out the wireless LAN station function is referred to as the P2P CL.
  • the completion of this step results in establishment of a logical connection between the communication apparatus that has requested the session start and the digital camera 120.
  • the completion of this step allows an application of this communication apparatus to communicate with the service in the application layer that the digital camera 120 provides by TCP/IP and UDP/IP.
  • step S1315 The establishment of the session in this step corresponds to step S1315 that will be described below.
  • step S1215 the main CPU 121 disables the notification of the information about the service in the application layer that has been enabled in step S1208. Therefore, after this step, the main CPU 121 does not respond to a probe request frame for searching for the service. Further, the main CPU 121 also deletes the notification ID stored in the RAM 122 in step S1208.
  • step S1216 the main CPU 121 starts the application for realizing the service in the application layer that has been notified of in step S1208.
  • the main CPU 121 starts the responder function of PTP-IP, which causes the main CPU 121 to operate according to a PTP-IP packet received as TCP/IP data and a PTP command contained therein thereafter.
  • step S1217 the main CPU 121 determines whether a command issued to the service in the application layer that has been started in step S1216 is received.
  • the main CPU 121 determines whether the received TCP/IP data is a PTP-IP packet. If the received TCP/IP data is a PTP-IP packet (YES in step S1217), the processing proceeds to step S1218. If the received TCP/IP data is not a PTP-IP packet (NO in step S1217), the processing proceeds to step S1219.
  • the PTP-IP packet received in this step corresponds to a PTP-IP packet transmitted in each of steps S1317, S1319, and the like that will be described below.
  • step S1218 the main CPU 121 operates according to the received PTP-IP packet and a PTP command contained therein.
  • the main CPU 121 when the main CPU 121 receives a PTP command for acquiring a thumbnail of specified image data, the main CPU 121 creates thumbnail data from this image data stored in the storage medium 127, and returns the created thumbnail data as a PTP response. Similarly, when the main CPU 121 receives a PTP command for acquiring image data, the main CPU 121 reads a part or whole of this image data stored in the storage medium 127 into the memory 122, and returns this data as a PTP response.
  • step S1219 the main CPU 121 determines whether a request for disconnecting the session established in step S1214 is issued.
  • This session disconnection request is issued by transmitting and receiving TCP or UDP data with use of the predetermined port number.
  • step S1219 If the session disconnection request is issued (YES in step S1219), the processing proceeds to step S1220. If no session disconnection request is issued (NO in step S1219), the processing returns to step S1217, in which the main CPU 121 waits for a next PTP-IP packet.
  • step S1220 the main CPU 121 ends the session established in step S1214. More specifically, the main CPU 121 performs the processing based on the specification of the Wi-Fi Direct protocol to terminate the association and end the role as the GO or the CL. In step S1221, the main CPU 121 stops the software for realizing the service in the application layer that has been started in step S1216.
  • step S1222 the main CPU 121 controls the wireless LAN unit 131 in such a manner that the wireless LAN unit 131 becomes unable to perform any wireless LAN communication.
  • step S1223 the main CPU 121 instructs the sub CPU 132 to shift to the standby state, and then stops all processes.
  • the sub CPU 132 controls the battery 130 to supply power exclusively to the sub CPU 132, the power saving wireless communication unit 133, and the nonvolatile memory 134, thereby placing the digital camera 120 into the standby state.
  • step S1202 Upon the completion of this step, the processing returns to step S1202, in which the sub CPU 132 restarts the Bluetooth advertisement to wait for a start of a next connection process. This is the operation of the digital camera 120.
  • the wireless LAN unit 108 of the mobile phone 100 is placed in the communicable state.
  • the wireless LAN unit 108 may be connected with another communication apparatus (a session is started with another communication apparatus), or may not be connected with any communication apparatus.
  • the processing in steps S1301 to S1309 is similar to the processing in steps S1001 to S1009 illustrated in Fig. 10. Therefore, the present flowchart will be described, starting from step S1310.
  • step S1310 the CPU 101 reads in the connection key characteristic of the camera selected by the user in step S1305 with use of the power saving wireless communication unit 109.
  • step S1311 the CPU 101 determines whether the value of the connection key characteristic read in step S1310 is valid. More specifically, the CPU 101 determines that the value of the connection key characteristic is invalid if this value is NULL, and determines that the value of the connection key characteristic is valid if this value is another value than NULL. If the CPU 101 determines that the value of the connection key characteristic is invalid (NO in step S1311), the processing returns to step S1310, in which the CPU 101 attempts to read in the connection key characteristic again. If the CPU 101 determines that the value of the connection key characteristic is valid (YES in step S1311), the processing proceeds to step S1312. Therefore, the CPU 101 repeatedly reads in the connection key characteristic until the value of the connection key characteristic is updated in the above-described step (step S1209).
  • the mobile phone 100 waits for an update of the value of the connection key characteristic by repeatedly reading out the connection key characteristic in this manner.
  • the present exemplary embodiment may be configured in such a manner that the mobile phone 100 is notified when the value of the connection key characteristic is changed with use of the notification mechanism of Bluetooth. If the present exemplary embodiment is configured in this manner, the CPU 101 operates so as to wait for a notification of the value of the connection key characteristic, and read out the connection key characteristic with use of the power saving communication unit 109 upon receiving the notification.
  • Communication of the mobile phone 100 thereafter is performed by control of the wireless LAN unit 108 by the CPU 101.
  • step S1312 the CPU 101 requests a session start for establishing a logical connection to the communication apparatus detected in step S1311.
  • the CPU 101 transmits the session start request with use of the management frame defined by IEEE 802.11.
  • the CPU 101 transmits the session start request as an action frame, which is one type of management frame.
  • This action frame for the session start request contains the MAC address of the transmission source transmitting the session start request, and the notification ID acquired from the probe response frame received in step S1310 as data thereof.
  • the CPU 101 uses the value of the CameraMAC characteristic of the CameraView service in the advertisement received in step S1302 as the MAC address of the communication apparatus to which the management frame is transmitted.
  • the advertisement contains the CameraMAC characteristic of Bluetooth.
  • the CPU 101 uses the MAC address contained in the value of the connection key characteristic as the transmission destination.
  • the action frame transmitted in this step corresponds to the above-described signal received in step S1210.
  • step S1313 the CPU 101 determines whether a response to the session start request transmitted in step S1312 is an action frame containing data indicating a rejection of the session start. If the response is an action frame indicating a rejection of the session start (YES in step S1313), the processing proceeds to step S1324. If the response is not this action frame (NO in step S1313), the processing proceeds to step S1314.
  • the action frame determined in this step corresponds to the above-described signal transmitted in step S1212.
  • step S1314 the CPU 101 determines whether the response to the session start request transmitted in step S1312 is an action frame containing data indicating permission for the session start.
  • this received action frame may contain information regarding the service in the application layer.
  • the received action frame may contain information about a protocol to be used, such as PTP-IP.
  • step S1314 If the received response is an action frame indicating permission for the session start (YES in step S1314), the processing proceeds to step S1315. If the received response is not this action frame (NO in step S1314), the processing returns to step S1312, in which the CPU 101 requests a session start again.
  • the action frame determined in this step corresponds to the above-described signal transmitted in step S1213.
  • step S1315 the CPU 101 establishes a session with the communication apparatus that has returned the permission for the session start (i.e., the camera selected in step S1305).
  • the establishment of the session in this step is similar to the above-described establishment of the session in step S1214, and therefore a description thereof is omitted here.
  • the CPU 101 constructs a new session in this step.
  • step S1301 the completion of this step allows the application activated in step S1301 to communicate with the service in the application layer that the above-described selected digital camera provides, by TCP/IP and UDP/IP.
  • step S1316 the CPU 101 changes the display of the display unit 104 to a GUI supposed to be displayed when the establishment of the connection is completed.
  • Fig. 11F illustrates an example of the GUI displayed in step S1316.
  • the name of the camera selected by the user in step S1305 is displayed in the message 1151, which allows the user to recognize that the process for establishing the connection via the wireless LAN is completed.
  • step S1317 the CPU 101 transmits a PTP command for acquiring thumbnail data with use of PTP-IP to the camera with which the session is established, and displays a GUI that allows the user to select an image to be acquired with use the acquired thumbnail data.
  • the PTP-IP packet for acquiring thumbnail data that is transmitted and received in this step corresponds to the above-described PTP-IP packet received and transmitted in steps S1217 and S1218.
  • Fig. 11G illustrates an example of the GUI displayed in step S1317.
  • the thumbnail data acquired from the camera is displayed as a list in the area 1162.
  • a mark indicating a data acquisition target is displayed while being superimposed on the tapped thumbnail. For example, tapping the thumbnail 1164 results in a display of the mark 1165.
  • step S1318 the CPU 101 determines whether storage of an image is selected on the GUI displayed in step S1317 by an operation performed on the operation unit 105.
  • the CPU 101 determines that storage of an image is selected when the "SAVE" button 1163 is tapped on the screen illustrated in Fig. 11G.
  • step S13108 If storage of an image is selected (YES in step S1318), the processing proceeds to step S1319. If storage of an image is not selected (NO in step S1318), the processing proceeds to step S1321.
  • step S1319 the CPU 101 transmits a PTP command for acquiring image data to each thumbnail selected as a storage target on the screen illustrated in Fig. 11G with use of PTP-IP, thereby acquiring image data body represented by each thumbnail.
  • the PTP-IP packet transmitted and received in this step corresponds to the above-described PTP-IP packet received and transmitted in steps S1217 and S1218.
  • step S1320 the CPU 101 updates the GUI screen, thereby notifying the user that the image acquisition is completed. More specifically, the CPU 101 deletes the mark 1165 indicating the data acquisition target illustrated in Fig. 11G.
  • step S1321 the CPU 101 determines whether an instruction to end the image acquisition application is issued.
  • the CPU 101 determines that an end instruction is issued when the "CLOSE" button 1161 is tapped on the screen illustrated in Fig. 11G.
  • step S1321 If an end instruction is issued (YES in step S1321), the processing proceeds to step S1322. If no end instruction is issued (NO in step S1321), the processing returns to step S1317, in which the CPU 101 continues the selection of an image to be acquired.
  • step S1322 the CPU 101 ends the session established in step S1315.
  • the CPU 101 performs the process based on the specification of the Wi-Fi Direct protocol to terminate the association and end the role as the GO or the CL.
  • step S1323 the CPU 101 ends the process for the connection to the camera that has been started in step S1301, and then the present flowchart is ended.
  • step S1324 is performed when the connection establishing process has failed in any of steps S1308 and S1313, and the CPU 101 displays a connection establishment failure screen indicating that the establishment of the connection has failed.
  • An operation of the connection establishment failure screen will be described below with reference to Fig. 11E.
  • step S1301 the user selects the "CONNECT TO CAMERA" button 1101 from the displayed operation buttons on the top screen of the application illustrated in Fig. 11A to perform an operation for the connection to the digital camera, which causes the processing to proceed to the reception of the advertisement in step S1302.
  • a subsequently displayed screen is the discovered camera screen displayed in step S1304 that is illustrated in Fig. 11B.
  • Peripheral devices advertising the CameraView service that are received by a repetition of the process from steps S1302 to S1305 until this time are displayed as a list in the camera list area 1111 on this screen.
  • Character strings each acquired from the CameraName characteristic of the CameraView service are displayed in the camera list area 1111.
  • the processing proceeds from step S1305 to S1306, in which the Bluetooth connection establishing screen illustrated in Fig. 11C is displayed. Further, in step S1309, the wireless LAN connection establishing screen illustrated in Fig. 11D is displayed.
  • the user does not have to perform any operation on the mobile phone 100 on the Bluetooth connection establishing screen and the wireless LAN connection establishing screen, and only has to wait for completion of the connection establishing process according to the display of the message 1121 or the message 1131.
  • the name of the camera selected by the user in step S1305 and the ongoing execution for the Bluetooth connection are displayed in the message 1121 on the Bluetooth connection establishing screen, which allows the user to recognize that the Bluetooth connection establishing process is ongoing. Further, the name of the camera selected by the user in step S1305 and the ongoing attempt for the wireless LAN connection are displayed in the message 1131 on the wireless LAN connection establishing screen, which allows the user to recognize that the wireless LAN connection establishing process is ongoing.
  • connection establishment failure screen illustrated in Fig. 11E is displayed in step S1324.
  • the user follows the instruction indicated by the message 1141 and selects the OK button 1142, which causes the processing to proceed to step S1323, leading to the end of the operation for the connection to the camera.
  • Fig. 11F illustrates the connection establishment completion confirmation screen displayed in step S1316.
  • the user selects the OK button 1152 on this screen, which causes the processing to proceed to step S1317.
  • Fig. 11G illustrates the image selection screen displayed in step S1317.
  • the "CLOSE” button 1161, the thumbnail list 1162, and the “SAVE” button 1163 are displayed on the image selection screen.
  • the end instruction is issued in step S1321, and then the processing proceeds to step S1322.
  • the thumbnails of the images stored in the digital camera 120 are displayed as a list in the thumbnail list 1162.
  • the selection icon 1165 is displayed on the thumbnail 1164.
  • a plurality of selection icons 1165 can be also displayed by selecting a plurality of images from the images displayed in the thumbnail list 1162.
  • the selection icon 1165 can be also deleted by reselecting an image with the selection icon 1165 already displayed thereon.
  • the processing proceeds from step S1318 to step S1319, in which the image data acquisition in step S1319 is performed on the selected image.
  • step S1320 the selection icon 1165 is deleted from the thumbnail of the image stored in step S1319.
  • the present exemplary embodiment utilizes Bluetooth with low power consumption to wait for communication, thereby allowing even a battery-driven mobile apparatus, for example, the digital camera, to constantly wait for communication.
  • the digital camera 120 is configured to determine whether an apparatus requesting wireless LAN communication is an apparatus with which the digital camera 120 has performed Bluetooth communication, before further constructing a wireless LAN network after performing the Bluetooth communication. This can prevent the digital camera 120 from constructing an unnecessary network.
  • the user can transmit an image from the digital camera 120 to the mobile phone 100 by operating only the mobile phone 100. Therefore, when the user wants to transmit an image, the user does not have to take out and operate both the digital camera 120 and the mobile phone 100.
  • Embodiments of the present invention can also be realized by a computer of a system or apparatus that reads out and executes computer executable instructions recorded on a storage medium (e.g., non-transitory computer-readable storage medium) to perform the functions of one or more of the above-described embodiment(s) of the present invention, and by a method performed by the computer of the system or apparatus by, for example, reading out and executing the computer executable instructions from the storage medium to perform the functions of one or more of the above-described embodiment(s).
  • the computer may comprise one or more of a central processing unit (CPU), micro processing unit (MPU), or other circuitry, and may include a network of separate computers or separate computer processors.
  • the computer executable instructions may be provided to the computer, for example, from a network or the storage medium.
  • the storage medium may include, for example, one or more of a hard disk, a random-access memory (RAM), a read only memory (ROM), a storage of distributed computing systems, an optical disk (such as a compact disc (CD), digital versatile disc (DVD), or Blu-ray Disc (BD)), a flash memory device, a memory card, and the like.

Abstract

Selon l'invention, un appareil de communication reçoit des informations pour identifier un appareil externe au moyen d'un second procédé de communication, reçoit des informations pour identifier l'appareil externe par utilisation d'un premier procédé de communication après réception des informations pour identifier l'appareil externe au moyen du second procédé de communication et avant d'appartenir à un réseau sans fil basé sur le premier procédé de communication, et détermine s'il faut ou non établir une communication par le premier procédé de communication sur la base des informations pour identifier l'appareil externe qui sont reçues au moyen du premier procédé de communication et des informations pour identifier l'appareil externe qui sont reçues au moyen du second procédé de communication.
PCT/JP2015/000350 2014-02-13 2015-01-27 Appareil de communication, procédé de commande d'appareil de communication et programme WO2015122129A1 (fr)

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JP2014-025736 2014-02-13
JP2014-025735 2014-02-13
JP2014025736A JP6395394B2 (ja) 2014-02-13 2014-02-13 通信装置、その制御方法、プログラム
JP2014025735A JP2015154205A (ja) 2014-02-13 2014-02-13 通信装置、その制御方法、プログラム

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US10409621B2 (en) 2014-10-20 2019-09-10 Taser International, Inc. Systems and methods for distributed control
US10901754B2 (en) 2014-10-20 2021-01-26 Axon Enterprise, Inc. Systems and methods for distributed control
US11544078B2 (en) 2014-10-20 2023-01-03 Axon Enterprise, Inc. Systems and methods for distributed control
US11900130B2 (en) 2014-10-20 2024-02-13 Axon Enterprise, Inc. Systems and methods for distributed control
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US10506129B2 (en) 2015-03-27 2019-12-10 Brother Kogyo Kabushiki Kaisha Communication apparatus
US11159696B2 (en) 2015-03-27 2021-10-26 Brother Kogyo Kabushiki Kaisha Communication apparatus
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