JP2015076816A - Transmission device, reception device, control method, program, and transmission and reception system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize ideal data transmission and reception via radio communication by reducing power consumption.SOLUTION: A transmission device determines whether a predetermined condition for data transmission is satisfied, while communication connection is established with a reception device which is a transmission destination, by a first communication method of low power consumption. When it is determined that the predetermined condition is satisfied, the transmission device notifies the reception device of a notification demanding to establish communication connection by a second communication method of which power consumption is higher than the first communication method, via communication by the first communication method. After the notification, when communication connection by the second communication method is established, the transmission device performs data transmission by the established communication.

Description

  The present invention relates to a transmission device, a reception device, a control method, a program, and a transmission / reception system, and relates to a communication technique between devices that perform data transmission / reception by wireless communication.

  2. Description of the Related Art Conventionally, there is a system in which an imaging device such as a digital camera is connected to an information processing device such as a PC, and an image obtained when an image is captured by the imaging device is transferred to the information processing device (Patent Document 1).

  In the system of Patent Document 1, the information processing apparatus and the imaging apparatus are connected to each other by wire connection, and in recent years, there are imaging apparatuses having a wireless LAN communication function. In such an imaging apparatus, when a user activates a wireless LAN communication function and performs a predetermined operation, a captured image or the like can be transmitted to another apparatus having the wireless LAN communication function. For example, a method of transmitting an image to a portable terminal such as a so-called smartphone and uploading the image from a smartphone to an SNS (Social Networking Service) can be considered.

JP 2000-137796 A

  On the other hand, in order to use an image captured by the imaging device on a portable terminal or the like, the user needs to perform an operation for establishing communication between the imaging device and the portable terminal. However, in a case where images are frequently transmitted, it is complicated to perform an operation for establishing communication every time.

  In order to avoid the complexity of the operation, it can be considered that the image transmission destination apparatus and the imaging apparatus are always connected for communication. However, there is a possibility that the power consumption will be increased in the always-on connection in the communication method with large power consumption such as wireless LAN.

  It is an object of the present invention to provide a transmission device, a reception device, a control method, a program, and a transmission / reception system that reduce power consumption and realize suitable data transmission / reception by wireless communication.

  In order to achieve the above-described object, the transmitting apparatus of the present invention is characterized by having the following configuration. Specifically, the transmission device is a transmission device including a first communication unit that performs wireless communication and a second communication unit that performs wireless communication with lower power consumption than the first communication unit. A determination unit that determines whether or not a predetermined condition for transmitting data is satisfied while a communication connection via the second communication unit is established with the receiving device, and a determination unit; A notification means for notifying the receiving apparatus via the second communication means of a notification prompting establishment of a communication connection via the first communication means when it is determined that a predetermined condition is satisfied, and a notification by the notification means And a control means for transmitting data via the first communication means when a communication connection via the first communication means is established.

  According to the present invention, it is possible to reduce power consumption and realize suitable data transmission / reception by wireless communication.

1 is a block diagram showing a functional configuration of a digital camera 100 according to an embodiment of the present invention. The block diagram which showed the function structure of the mobile telephone 200 which concerns on embodiment of this invention. The figure which showed the system configuration | structure of the transmission / reception system which concerns on embodiment of this invention The sequence diagram which showed the outline | summary of the image transmission / reception operation | movement which concerns on Embodiment 1 of this invention. The flowchart which illustrated the image reception process performed in the mobile telephone 200 which concerns on Embodiment 1 of this invention. 6 is a flowchart illustrating an image transmission process executed in the digital camera 100 according to the first embodiment of the invention. The sequence diagram which showed the outline | summary of the image transmission / reception operation | movement which concerns on Embodiment 2 of this invention. The flowchart which illustrated the image reception process performed in the mobile telephone 200 which concerns on Embodiment 2 of this invention. The flowchart which illustrated the image reception process performed in the mobile telephone 200 which concerns on Embodiment 2 of this invention. The figure for demonstrating the display mode of the display part 206 of the mobile telephone 200 which concerns on Embodiment 2 of this invention.

[Embodiment 1]
Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the drawings. In the following embodiment, an example in which the present invention is applied to a digital camera capable of transmitting and receiving data by two types of wireless communication functions as an example of a transmission apparatus in a transmission and reception system will be described. In the present embodiment, an example in which the present invention is applied to a mobile phone capable of transmitting and receiving data using the same two types of wireless communication functions will be described as an example of a receiving device in a transmission and reception system. However, the transmission device and the reception device of the present invention can be applied to any device that can transmit and receive data using two types of wireless communication functions.

<< System configuration of the transmission / reception system >>
FIG. 1 is a diagram showing a system configuration of a transmission / reception system according to an embodiment of the present invention.

  In the transmission / reception system of the present embodiment, an image captured by the digital camera 100 is transmitted to the mobile phone 200 by wireless LAN communication. The connection of the wireless LAN can be performed as shown in FIGS. 3A and 3B, for example. In FIG. 3A, the digital camera 100 and the mobile phone 200 operate as infrastructure mode slave devices, and communication connection is established via an external AP (access point) 300 that is an external relay device. Specifically, the digital camera 100 and the mobile phone 200 detect a beacon signal periodically transmitted by the external AP 300 and participate in a wireless LAN network formed by the external AP 300. After participating in the wireless LAN network, the digital camera 100 and the mobile phone 200 can discover each other's devices and establish communication connections through capability acquisition and the like. In FIG. 3B, the digital camera 100 itself operates as an AP (in this case, a simple AP with a limited function (hereinafter referred to as a simple AP)) and is carried by the wireless LAN network formed thereby. The telephone 200 participates and communication connection is made. Specifically, the mobile phone 200 detects a beacon signal periodically transmitted from the digital camera 100 operating as a simple AP, and participates in a wireless LAN network formed by the digital camera 100. As in FIG. 3A, communication connection is established through capability acquisition and the like. Here, the simple AP is an AP that does not have a gateway function for transferring data received from a slave device to an Internet provider or the like.

  In the transmission / reception system according to the present embodiment, the digital camera 100 and the mobile phone 200 perform communication using Bluetooth (registered trademark) separately from the communication using the wireless LAN, regardless of the modes shown in FIGS. Assumed to be performed. Bluetooth communication adopts Bluetooth Low Energy version 4.0, which is low power consumption, and uses less power for maintaining the communication connection and data communication than wireless LAN communication. On the other hand, Bluetooth communication has a lower data transfer rate than wireless LAN communication. Therefore, in this embodiment, the transmission of image data with a large amount of data uses wireless LAN communication, and other communication uses Bluetooth communication with the wireless LAN disconnected, thereby reducing power consumption. Realize reduction. In the present embodiment, the digital camera 100 and the mobile phone 200 communicate with each other by wireless LAN and Bluetooth. However, the two types of communication used to implement the present invention are not limited to this. . In the two types of communication connections made between the digital camera 100 and the mobile phone 200 in the transmission / reception system, the communication method adopted by one communication connection consumes more power than the communication method adopted by the other communication connection. It only has to be different. In addition, it is assumed that a communication connection with a communication method with higher power consumption has a higher transfer rate for data transmission, and that it is more efficient to use the communication connection with this method for transmission of large-capacity data.

  In the following description, the digital camera 100 and the mobile phone 200 are described as performing wireless LAN communication connection in the form shown in FIG. 3B, but the embodiment of the present invention is limited to any form. It is not a thing. In FIG. 3A, the external AP 300 is connected to an external network such as the Internet, and the digital camera 100 and the mobile phone 200 are configured to be connected to the external network via the external AP 300. Implementation of the invention is not limited to this. In particular, considering that the image captured by the digital camera 100 that is the transmission source is transmitted to the mobile phone 200 and processing is performed in the mobile phone 200 as in the present embodiment, the digital camera 100 is connected to an external network. It is not necessary to have a function. In the present embodiment, the following description will be given using a mobile phone 200 having a function of connecting to a public communication network as one aspect of the receiving device. However, in the embodiment of the present invention, the mobile phone 200 has a function of connecting to an external network. It will be easily understood that it is not necessary.

<Configuration of digital camera 100>
FIG. 1 is a block diagram showing a functional configuration of a digital camera 100 according to an embodiment of the present invention. In the following description, in order to clearly distinguish the constituent elements of the mobile phone 200 from the constituent elements of the digital camera 100, each constituent element of the digital camera 100 is given a prefix of “camera”. .

  The camera control unit 101 is a CPU, for example. The camera control unit 101 controls the operation of each block of the digital camera 100 according to the input signal and the operation program of each block of the digital camera 100. Note that instead of the camera control unit 101 controlling the entire apparatus, a plurality of hardware may share the processing to control the entire apparatus.

  The camera imaging unit 102 is a photographing unit having an imaging element such as a CCD or a CMOS sensor. The camera imaging unit 102 photoelectrically converts subject light imaged on the image sensor surface by a lens included in the camera imaging unit 102, and performs digital noise reduction processing, A / D conversion processing, and the like on the obtained analog image signal. Output data as image data. Image data obtained by imaging is stored in the camera work memory 104 which is a buffer memory, and then subjected to a predetermined calculation by the camera control unit 101 and recorded in the camera recording medium 110.

  The camera nonvolatile memory 103 is an electrically erasable / recordable nonvolatile memory. The camera nonvolatile memory 103 stores an operation program for each block of the digital camera 100, a program for causing the digital camera 100 to function as a simple AP, and the like.

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

  The camera operation unit 105 is a user interface that the digital camera 100 has. The camera operation unit 105 includes operation members such as a power button for instructing power ON / OFF of the digital camera 100, a release switch for instructing photographing, and a reproduction button for instructing image data reproduction. In addition, a touch panel sensor configured in combination with a camera display unit 106 to be described later is one of user interfaces. When the camera operation unit 105 detects that each user interface is operated by the user, the camera operation unit 105 outputs a control signal corresponding to the operation to the camera control unit 101. The operation of the release switch is defined in two stages, and the camera operation unit 105 outputs a SW1 signal or a SW2 signal according to each state (stroke amount). Specifically, when the release switch is in a so-called half-pressed state, the camera operation unit 105 outputs the SW1 signal as ON. Upon receiving the SW1 signal, the camera control unit 101 prepares for shooting such as AF (auto focus) processing, AE (auto exposure) processing, AWB (auto white balance) processing, and EF (flash pre-flash) processing. Also, when the release switch is in a so-called fully depressed state, the camera operation unit 105 outputs the SW2 signal as ON. The camera control unit 101 receives the SW2 signal and executes each process related to shooting.

  The camera display unit 106 is a display device included in the digital camera 100 such as an LCD. The camera display unit 106 displays a viewfinder image at the time of shooting, displays shot image data, and displays characters for interactive operation. The camera display unit 106 does not necessarily need to be built in the digital camera 100. The digital camera 100 may be connected to an internal or external display device and may have at least a display control function for controlling display of the display device.

  The camera recording medium 110 is a recording device that can record image data output from the camera imaging unit 102. The camera recording medium 110 may be a recording device that can be detachably attached to the digital camera 100 such as a memory card, or may be a built-in memory of the digital camera 100 or the like.

  The camera wireless LAN communication unit 111 is one wireless communication interface that the digital camera 100 has. As described above, the digital camera 100 of this embodiment can exchange data with the mobile phone 200 that is an external device via the camera wireless LAN communication unit 111.

  The camera Bluetooth communication unit 112 is another wireless communication interface that the digital camera 100 has. Similar to the camera wireless LAN communication unit 111, the digital camera 100 according to the present embodiment can exchange data with the mobile phone 200, which is an external device, via the camera Bluetooth communication unit 112.

<Configuration of mobile phone 200>
Next, the functional configuration of the mobile phone 200 according to the embodiment of the present invention will be described using the block diagram of FIG. In the present embodiment, the mobile phone 200 is described as a so-called camera-equipped mobile phone having the imaging unit 202, but the mobile phone 200 does not have to have the imaging unit 202 in the implementation of the present invention.

  The control unit 201 is a CPU, for example. The control unit 201 controls the operation of each block of the mobile phone 200 according to the input signal and the operation program of each block of the mobile phone 200. Note that instead of the control unit 201 controlling the entire apparatus, the entire apparatus may be controlled by a plurality of pieces of hardware sharing the processing.

  The imaging unit 202 is a photographing unit having an imaging element such as a CCD or a CMOS sensor. Subject light imaged on the image sensor surface by a lens included in the imaging unit 202 is subjected to photoelectric conversion, noise reduction processing, A / D conversion processing, and the like are performed, and digital data is output as image data. Image data obtained by imaging is stored in a work memory 204 that is a buffer memory, and then subjected to a predetermined calculation by the control unit 201 and recorded in the recording medium 210.

  The nonvolatile memory 203 is an electrically erasable / recordable nonvolatile memory. The nonvolatile memory 203 stores an operation program for each block of the mobile phone 200, parameters necessary for the operation of each block, and the like. The nonvolatile memory 203 also stores a program (synchronization application) for communicating with the digital camera 100. Note that the synchronization application may have a program for using the basic functions of the OS of the mobile phone 200. Alternatively, the OS of the mobile phone 200 may be configured to have a program for realizing processing corresponding to the synchronization application.

  The working memory 204 is a volatile memory such as a RAM. The work memory 204 is used as a buffer memory that temporarily stores image data generated by the imaging unit 202, an image display memory of the display unit 206, a work area of the control unit 201, and the like.

  The operation unit 205 is a user interface that the mobile phone 200 has. The operation unit 205 includes an operation member such as a power button for instructing power ON / OFF of the mobile phone 200 and a touch panel sensor configured in combination with the display unit 206. When the operation unit 205 detects that each user interface is operated by the user, the operation unit 205 outputs a control signal corresponding to the operation to the control unit 201.

  The display unit 206 is a display device included in the mobile phone 200 such as an LCD. The display unit 206 displays image data, characters for interactive operation, and the like. Note that the display unit 206 is not necessarily built in the mobile phone 200. The mobile phone 200 can be connected to a display device and has at least a display control function for controlling the display of the display device.

  The recording medium 210 is a recording device that can record image data output from the imaging unit 202. The recording medium 210 may be a recording device that can be detachably attached to the mobile phone 200 such as a memory card, or may be a built-in memory of the mobile phone 200.

  The wireless LAN communication unit 211 is one of wireless communication interfaces that the mobile phone 200 has. As described above, the mobile phone 200 of this embodiment can exchange data with the digital camera 100 that is an external device via the wireless LAN communication unit 211.

  The Bluetooth communication unit 215 is one of wireless communication interfaces that the mobile phone 200 has. Similar to the wireless LAN communication unit 211, the mobile phone 200 according to the present embodiment can exchange data with an external apparatus via the Bluetooth communication unit 215.

  The public network connection unit 212 is a communication interface used when performing public wireless communication. The mobile phone 200 can make a call with another device or perform data communication via the public network connection unit 212. During a call, the control unit 201 inputs and outputs an audio signal via the microphone 213 and the speaker 214. In this embodiment, the public network connection unit 212 includes an interface for performing communication using 3G. Not only 3G but other communication methods such as LTE, WiMAX, ADSL, FTTH, so-called 4G may be used. In addition, the wireless LAN communication unit 211 and the public network connection unit 212 are not necessarily configured by independent hardware, and can be shared by, for example, one antenna.

<Overview of operation>
The digital camera 100 according to the present embodiment can perform image data transmission operation by setting a mode for automatically transferring an image to a mobile phone (hereinafter referred to as a synchronous mode) when the power is on. it can. The mode may be set by the user selecting the synchronization mode from the setting menu of the digital camera 100, for example. In response to the synchronization mode being set to ON, the camera control unit 101 starts communication connection with the mobile phone 200 via the camera Bluetooth communication unit 112.

  On the other hand, the connection-destination mobile phone 200 can perform an operation for receiving image data in response to activation of a synchronization application for receiving image data from the digital camera 100. Specifically, the control unit 201 starts communication connection with the digital camera 100 via the Bluetooth communication unit 215 in response to an instruction to start an application. In the present embodiment, it is assumed that the digital camera 100 and the mobile phone 200 have previously performed a pairing operation related to communication connection by Bluetooth.

  The outline of the operation in the system of the present embodiment will be described below using the sequence diagram of FIG. Note that the processing according to the sequence diagram is realized by the control unit of each device controlling each block by developing and executing a program stored in the nonvolatile memory.

  First, in T401, the synchronization application in the present embodiment is activated on the mobile phone 200 by a user operation. Then, as described above at T402, the mobile phone 200 turns ON if the Bluetooth communication unit 215 is not turned ON, and starts searching for a paired connection partner in Bluetooth communication at T403.

  The digital camera 100 is turned on by a user operation at T404. When the digital camera 100 is set to the shooting mode and further set to the synchronization mode, the camera Bluetooth communication unit 112 is turned on. In T405, advertisement related to communication by Bluetooth is performed. Advertising means sending a signal indicating the presence of the own device.

  When the paired digital camera 100 is detected in response to the advertisement, the mobile phone 200 transmits a response to the digital camera 100 at T406 and establishes a communication connection by Bluetooth. When the Bluetooth connection is established, the mobile phone 200 periodically sends a camera event transmission request to the digital camera 100 as shown in T407 and T408.

  The digital camera 100 receives a camera event transmission request and transmits it to the mobile phone 200 if there is an event to be notified, but does not process anything if there is no event to be notified. For example, when the user performs a shooting operation, the digital camera 100 performs a shooting process and an image storage process in T409. The digital camera 100 according to the present embodiment generates an image addition event according to the image storage process. Here, in the synchronous mode described above, image data obtained by photographing is automatically transmitted. Accordingly, the image data stored here is added to the transmission target, and a state in which image data that has not been transmitted to the mobile phone 200 exists in the camera recording medium 110 occurs. Here, in response to a camera event transmission request from the mobile phone 200 at T410, the digital camera 100 notifies the mobile phone 200 via the camera Bluetooth communication unit 112 that an image addition event has occurred at T411.

  Receiving the occurrence of the image addition event, the mobile phone 200 requests the digital camera 100 for access point information for connection via a wireless LAN at T412.

  In response to the request, the digital camera 100 operates as a simple AP as described above and forms a wireless LAN network. At T414, the SSID and password of the created wireless LAN network are transmitted to the mobile phone 200 via Bluetooth. Note that the SSID and password of the wireless LAN network formed by the digital camera 100 may be designated from the mobile phone 200 and transmitted to the digital camera 100.

  The mobile phone 200 is turned on if the wireless LAN communication unit 211 is not turned on at T415, and is connected to the network formed by the digital camera 100 at T416. At T417, the mobile phone 200 requests transmission of the added image data, and the digital camera 100 transmits the requested image data at T418.

  Note that the mobile phone 200 according to the present embodiment periodically acquires camera events by Bluetooth, such as T410 and T411, even during connection via a wireless LAN. Therefore, even when the digital camera 100 captures an image during transmission of image data to the mobile phone 200, an image addition event can be notified to the mobile phone 200. The processes of T417 and T418 are repeated until transmission / reception of image data corresponding to all the generated image addition events is completed. When the reception of all the image data is completed, the mobile phone 200 notifies the digital camera 100 to end the wireless LAN connection at T419 by wireless LAN communication. This notification may be performed by Bluetooth. The digital camera 100 turns off the wireless LAN at T420 and the mobile phone 200 turns off at T421.

<Image reception processing>
Next, specific processing will be described with reference to the flowchart of FIG. 5 for image reception processing executed in the mobile phone 200 in connection with such image data transmission / reception operation. The processing corresponding to the flowchart can be realized by the control unit 201 reading the corresponding program for the synchronous application described above, developing it in the work memory 204, and executing it. Note that this image reception process will be described as being started when the synchronization application is activated.

  In step S501, the control unit 201 sets the Bluetooth communication unit 215 to the ON state by setting the Bluetooth communication unit 215 to the ON state when the Bluetooth communication unit 215 is not set to the ON state. To do. In step S502, the Bluetooth communication unit 215 searches for a paired Bluetooth device under the control of the control unit 201.

  In step S503, the control unit 201 determines whether the Bluetooth communication unit 215 has detected the digital camera 100 that is a paired Bluetooth device. If the control unit 201 determines that the Bluetooth communication unit 215 has detected the digital camera 100, the control unit 201 moves the process to step S <b> 504. If it determines that the detection has not been performed, the control unit 201 returns the process to step S <b> 502.

  In S504, the Bluetooth communication unit 215 makes a connection request to the paired digital camera 100 under the control of the control unit 201, and establishes a Bluetooth communication connection with the digital camera 100 (S505).

  When the communication connection is established, the control unit 201 causes the Bluetooth communication unit 215 to make a transmission request for information (camera event information) for notifying the camera event to the digital camera 100 in S506. It should be noted that the transmission request for camera event information is repeatedly made at regular intervals while a Bluetooth communication connection is established.

  In step S <b> 507, the control unit 201 determines whether the Bluetooth communication unit 215 has received camera event information from the digital camera 100. When the control unit 201 determines that the camera event information has been received, the control unit 201 stores the information in the work memory 204 and moves the process to S508.

  In step S <b> 508, the control unit 201 determines whether the camera event information received by the Bluetooth communication unit 215 is information indicating an image addition event in which new image data is added to the camera recording medium 110 in the digital camera 100. . When it is determined that the camera event information indicates an image addition event, the control unit 201 moves the process to S509, and when it determines that the camera event information does not indicate an image addition event, the control unit 201 returns the process to S506. The camera event information indicating the image addition event includes information (specific information) for specifying the image data when an image acquisition request is made, such as an ID of the image data.

  In step S <b> 509, the control unit 201 requests the digital camera 100 to transmit information (AP information) related to an AP connection such as an SSID and a password for performing wireless LAN communication with the digital camera 100 via the Bluetooth communication unit 215. .

  In step S510, the control unit 201 determines whether the Bluetooth communication unit 215 has received AP information. If the control unit 201 determines that the Bluetooth communication unit 215 has received the AP information, the control unit 201 moves the process to S511. If the control unit 201 determines that the AP information has not been received, the control unit 201 repeats the process of this step.

  In step S <b> 511, the control unit 201 changes the wireless LAN communication unit 211 to an ON state, that is, a state in which communication by the wireless LAN is possible. At this time, if the wireless LAN communication unit 211 is in communication connection with a device other than the digital camera 100, the control unit 201 disconnects the connection of the wireless LAN communication unit 211.

  In step S512, the control unit 201 establishes a wireless LAN connection with the digital camera 100 via the wireless LAN communication unit 211 according to the AP information. When the wireless LAN communication connection with the digital camera 100 is established, the control unit 201 moves the process to S513.

  In step S <b> 513, the control unit 201 makes a transmission request for image data related to the image addition event to the digital camera 100 via the wireless LAN communication unit 211 in accordance with the specific information included in the camera event information indicating the image addition event.

  In step S <b> 514, the control unit 201 determines whether the wireless LAN communication unit 211 has completed reception of image data related to a transmission request from the digital camera 100. If the control unit 201 determines that the reception of the image data related to the transmission request has been completed, the control unit 201 moves the process to S515, and if it determines that the image data has not been completed, the control unit 201 repeats the process of this step.

  In step S <b> 515, the control unit 201 determines whether there is camera event information in the work memory 204 that has not yet requested transmission of image data. If the control unit 201 determines that camera event information that has not been requested for transmission exists in the work memory 204, the control unit 201 moves the process to S513, and makes a transmission request for the information. If the control unit 201 determines that there is no camera event information for which no transmission request has been made, the control unit 201 moves the process to S516.

  In step S <b> 516, the control unit 201 transmits a wireless LAN communication connection disconnection request to the digital camera 100 that is an AP via the wireless LAN communication unit 211. As described above, the disconnection request may be transmitted by Bluetooth. In step S517, the control unit 201 changes the wireless LAN communication unit 211 to an OFF state, that is, a state in which communication by the wireless LAN is not possible, and returns the process to step S506.

<Image transmission processing>
On the other hand, specific processing of the image transmission processing executed in the digital camera 100 in connection with the image data transmission / reception operation as shown in FIG. 4 will be described with reference to the flowchart of FIG. The processing corresponding to the flowchart can be realized by the camera control unit 101 reading the corresponding program from the camera non-volatile memory 103, developing it in the camera work memory 104, and executing it. The image receiving process will be described as being started when the synchronization mode is set in the digital camera 100.

  In step S601, the camera control unit 101 changes the camera Bluetooth communication unit 112 to the ON state if the camera Bluetooth communication unit 112 is not set to the ON state. That is, the camera control unit 101 changes the camera Bluetooth communication unit 112 to a communicable state if the camera control unit 101 is not set to a communicable state via Bluetooth. In step S <b> 602, the camera Bluetooth communication unit 112 starts an advertisement operation related to Bluetooth under the control of the camera control unit 101.

  In step S <b> 603, the camera control unit 101 determines whether the camera Bluetooth communication unit 112 has received a connection request for communication using Bluetooth. If it is determined that the connection request has been received, the camera control unit 101 moves the process to S604. If it is determined that the connection request has not been received, the camera control unit 101 repeats the process of this step until it is received.

  In step S604, the camera control unit 101 establishes a Bluetooth communication connection with the Bluetooth device that has received the connection request, that is, the mobile phone 200 of the present embodiment.

  In step S <b> 605, the camera control unit 101 determines whether a control signal corresponding to the operation related to the shooting instruction has been received from the camera operation unit 105. When the camera control unit 101 determines that the control signal corresponding to the operation related to the shooting instruction has been received from the camera operation unit 105, the camera control unit 101 performs the shooting process, records the image data related to the shooting in the camera recording medium 110, and completes the recording. Thereafter, the process proceeds to S606. If the camera control unit 101 determines that the control signal has not been received, the process of this step is repeated.

  In step S <b> 606, the camera control unit 101 transmits camera event information indicating an image addition event generated including specific information of captured image data to the mobile phone 200 via the camera Bluetooth communication unit 112.

  In step S <b> 607, the camera control unit 101 determines whether the camera Bluetooth communication unit 112 has received a transmission request for AP information. If it is determined that the AP information transmission request has been received, the camera control unit 101 moves the process to S608, and if it determines that the AP information transmission request has not been received, the camera control unit 101 repeats the process of this step.

  In step S <b> 608, the camera control unit 101 performs processing for turning on the camera wireless LAN communication unit 111 to function as a simple AP, thereby forming a wireless LAN network. In step S <b> 609, the camera control unit 101 generates AP information related to the connection to the simple AP, and transmits the AP information to the mobile phone 200 via the camera Bluetooth communication unit 112.

  In step S <b> 610, the camera control unit 101 determines whether the camera wireless LAN communication unit 111 has received a transmission request for image data from the mobile phone 200. If the camera control unit 101 determines that it has received a transmission request for image data, it moves the process to S611. If it determines that it has not received it, it moves the process to S612.

  In step S611, the camera control unit 101 refers to the specific information included in the received transmission request, reads the image data specified by the specific information from the camera recording medium 110, and transmits the image data to the camera wireless LAN communication unit 111. Transmit to the camera 100.

  In step S <b> 612, the camera control unit 101 determines whether a control signal corresponding to the operation related to the shooting instruction is received from the camera operation unit 105 as in step S <b> 605. When the camera control unit 101 determines that the control signal corresponding to the operation related to the shooting instruction has been received, the camera control unit 101 performs shooting processing to record the image data related to shooting in the camera recording medium 110, and after the recording is completed, the processing is performed in step S613. Move to. If the camera control unit 101 determines that the control signal has not been received, it moves the process to S614.

  In step S <b> 613, the camera control unit 101 transmits camera event information indicating an image addition event generated including specific information of captured image data to the mobile phone 200 via the camera Bluetooth communication unit 112.

  In step S <b> 614, the camera control unit 101 determines whether the camera wireless LAN communication unit 111 has received a request for disconnecting a wireless LAN communication connection from the mobile phone 200. If the camera control unit 101 determines that a communication connection disconnection request has been received, it moves the process to S615. If it determines that it has not received it, it returns the process to S610.

  In step S615, the camera control unit 101 discards the wireless LAN network formed in the camera wireless LAN communication unit 111, sets the camera to the OFF state, disconnects the communication connection, and returns the process to step S605. Note that the camera control unit 101 may notify the mobile phone 200 that the wireless LAN has been turned off using Bluetooth.

  As described above, by performing the image reception process in the mobile phone 200 and the image transmission process in the digital camera 100, the operation shown in the sequence diagram of FIG. 4 can be realized. That is, since it is possible to control the operation so that the communication connection by the wireless LAN is performed only when the image data needs to be transmitted, the power consumption is reduced compared to the case where the communication connection by the wireless LAN is always performed. be able to.

  In the present embodiment, camera event information indicating an image addition event is transmitted to the mobile phone 200 when shooting is performed with the digital camera 100, thereby establishing a wireless LAN communication connection and transmitting / receiving data. As explained. However, the communication connection control by the wireless LAN may be performed without being limited to this. For example, when an operation related to mode switching for switching the shooting mode, the playback mode, or the like is performed, if a wireless LAN communication connection is established, the connection is disconnected, and the state before the wireless LAN communication connection is established If it is, control may be performed so that the connection is not made. Further, for example, when it is detected that the remaining power of the driving power source of the digital camera 100 is lower than the threshold value, the wireless LAN communication is performed even if the synchronization mode is set so that the photographing process can be performed with priority. Control may be performed so that connection is not performed, and power consumption may be suppressed.

  Further, when it is detected that the recordable capacity of the camera recording medium 110 has fallen below a threshold value by recording image data, for example, information corresponding to the camera event information is added to notify the mobile phone 200 to that effect. May be. At this time, when the control unit 201 recognizes that the recordable capacity has fallen below the threshold based on the camera event information, the control unit 201 transmits a deletion request for deleting the image data from the camera recording medium 110 separately from the transmission request for the image data. May be. Accordingly, the camera control unit 101 can process the image data that has been transmitted to be deleted from the camera recording medium 110 in response to a deletion request. That is, even when the recordable area is reduced, the recorded image data can be deleted after transmission to the mobile phone 200 as an external device, and the data can be deleted. The user can take a picture without worrying about.

  In the present embodiment, two types of communication, wireless LAN and Bluetooth, are used as a communication method with high power consumption and a communication method with low power consumption. For this reason, although it has been described in the above-described flowchart and the like that a request is appropriately made between apparatuses and operation control corresponding to the request is performed, the embodiment of the present invention is not limited to this. For example, when the digital camera 100 is in the synchronous mode and detects that there is untransferred image data on the camera recording medium 110, the camera control unit 101 causes the mobile phone 200 to consume high power through communication with low power consumption. A notification that prompts establishment of a communication connection may be performed. After the notification, the camera control unit 101 controls the camera wireless LAN communication unit 111 to be in a state where communication connection is possible. On the other hand, when the control unit 201 receives the notification, the control unit 201 executes processing related to establishment of communication connection. Then, in response to the establishment of the communication connection, the camera control unit 101 may transmit data using a communication connection with high power consumption. As described above, it is also possible to perform control so that untransmitted image data is transmitted in response to establishment of a communication connection without performing a transmission request for image data using a camera event transmission request or specific information. Is possible.

  As described above, the transmission apparatus according to the present embodiment can reduce power consumption and realize suitable data transmission / reception by wireless communication. Specifically, the transmission device satisfies a predetermined condition for transmitting data while a communication connection according to the first communication method with low power consumption is established with the reception device as a transmission destination. Determine whether or not. If it is determined that the predetermined condition is satisfied, a notification prompting establishment of a communication connection related to the second communication method, which consumes more power than the first communication method, is sent to the communication related to the first communication method. To the receiving device. Then, after the notification, when the communication connection according to the second communication method is established, the transmission device transmits data via the communication.

[Embodiment 2]
In the first embodiment described above, the example in which the image processing is performed in the digital camera 100 and the image data is recorded, and then the image data is transmitted to the mobile phone 200 has been described. However, for example, when continuous shooting is performed in the digital camera 100, establishing a wireless LAN communication connection and performing transmission of image data after shooting affects other processing in the digital camera 100. There is a possibility of effect. Specifically, when continuous shooting is performed, processing related to shooting is performed, and various image processing, processing to be recorded on the camera recording medium 110, and the like are sequentially performed. If the image data transmission process is performed, processing resources may be compressed. When processing resources are compressed, there is a possibility that, for example, the number of images that can be continuously shot in one second may be reduced, or a delay in image recording due to a processing delay may occur.

  In the present embodiment, the implementation of the present invention considering the operation related to the parallel processing will be described below. In the present embodiment, a transmission / reception system in which communication related to a wireless LAN is performed when the digital camera 100 illustrated in FIG. 3B operates as a simple AP as in the first embodiment will be described as an example. The configurations of the digital camera 100 and the mobile phone 200 according to the present embodiment are the same as those of the first embodiment, and a description thereof is omitted.

<Overview of operation>
FIG. 7 is a sequence diagram showing an outline of the operation in the transmission / reception system of this embodiment. In the sequence diagram of FIG. 7, the processes from T701 to T706 and T709 to T711 correspond to the processes of T401 to T406 and T409 to T411 of FIG. 4 described in the first embodiment, respectively. However, for T704, when the digital camera 100 is turned on, the digital camera 100 turns on the camera Bluetooth communication unit 112 even if the shooting mode is not set.

  In T707, the mobile phone 200 requests the current mode state of the digital camera 100, and receives information on the current mode state in T708. The current mode state information is information indicating whether a shooting mode is set in the digital camera 100 or a mode other than the shooting mode such as a playback mode is set.

  After the image addition event is notified from the digital camera 100 to the mobile phone 200 by the user's shooting operation, the mobile phone 200 requests thumbnail information of the shot image data at T712. The thumbnail information is information included in a main body file related to image data obtained by shooting, and includes thumbnail image (representative image) data and specific information for specifying the main body file (image data). Thumbnail information is information that has a relatively small amount of data compared to the main body file, and can be transmitted in a relatively short time even with Bluetooth having a low communication speed. The mobile phone 200 can display a thumbnail image in a predetermined application based on the received thumbnail information.

  When receiving the thumbnail information from the digital camera 100 at T713, the mobile phone 200 adds the specific information included in the thumbnail information to the thumbnail list stored in the work memory 204 at T714. The thumbnail list is a list for managing specific information stored in the nonvolatile memory 203 of the mobile phone 200 and corresponding to a main body file (image data) that has not been received from the digital camera 100. In this way, every time a shooting operation is performed, only the thumbnail information including the specific information is transmitted from the digital camera 100, and the specific information is stored in the thumbnail list in the mobile phone 200.

  Next, when the digital camera 100 shifts to the playback mode by the user's operation, in response to the camera event transmission request transmitted by the mobile phone 200 in T715, an event indicating that the digital camera 100 has changed the mode in T716. Notify In the description of the sequence diagram, the mode in which image transmission is performed is described as a playback mode. However, image transmission may be performed in other modes as long as the mode does not affect shooting processing other than the shooting mode. For this reason, in the image receiving process and the image transmitting process described later, it is assumed that it is determined whether or not to perform image transmission depending on whether the mode set in the digital camera 100 is the shooting mode or the other mode. To do.

  Also, from T717 to T721, the cellular phone 200 requests AP information, the digital camera 100 forms a simple AP wireless LAN network, and the cellular phone 200 connects to the wireless LAN network from T412 to T416 in FIG. It corresponds to each processing.

  Then, the mobile phone 200 requests transmission of image data corresponding to the specific information in the thumbnail list at T722. When the mobile phone 200 receives image data from the digital camera 100 at T723, the mobile phone 200 deletes the specific information corresponding to the received image data from the thumbnail list at T724. This process from T722 to T724 is repeated until all the specific information included in the thumbnail list is deleted, and when all the specific information is deleted, the mobile phone 200 disconnects the wireless LAN communication connection to the digital camera 100 at T725. Notify you. At T726 for the digital camera 100 and at T727 for the mobile phone 200, the wireless LAN communication unit of each device is turned off.

<Image reception processing>
Next, specific processing will be described with reference to the flowchart of FIG. 8 regarding image reception processing executed in the mobile phone 200 in connection with the image data transmission / reception operation of the present embodiment. The processing corresponding to the flowchart can be realized by the control unit 201 reading the corresponding program for the synchronous application described above, developing it in the work memory 204, and executing it. Note that this image reception process will be described as being started when the synchronization application is activated. In the image receiving process of the present embodiment, the same reference numerals are assigned to the steps for performing the same process as the image receiving process of the first embodiment, and the description thereof is omitted. Keep on.

  After establishing a Bluetooth communication connection with the digital camera 100 in S <b> 505, the control unit 201 transmits a transmission request for information on the current mode state to the digital camera 100 via the Bluetooth communication unit 215 in S <b> 801.

  In step S <b> 802, the control unit 201 determines whether the Bluetooth communication unit 215 has received information on the current mode state from the digital camera 100. When it is determined that the current mode state information has been received, the control unit 201 moves the process to S506, and when it is determined that the current mode state information has not been received, the control unit 201 repeats the process of this step.

  If it is determined in step S507 that camera event information has been received, the control unit 201 determines in step S803 whether the camera event information received by the Bluetooth communication unit 215 is information indicating an image addition event in the digital camera 100. If the control unit 201 determines that the camera event information is information indicating an image addition event, the control unit 201 moves the process to S804. If the control unit 201 determines that the camera event information is information that does not indicate an image addition event, the control unit 201 moves the process to S807. It is assumed that the camera event information indicating the image addition event of the present embodiment includes information for specifying thumbnail information related to the added image data.

  In step S <b> 804, the control unit 201 transmits a transmission request for thumbnail information specified by camera event information indicating an image addition event to the digital camera 100 via the Bluetooth communication unit 215.

  In step S <b> 805, the control unit 201 determines whether the Bluetooth communication unit 215 has received thumbnail information from the digital camera 100. If the control unit 201 determines that the thumbnail information has been received, the process proceeds to step S806. If the control unit 201 determines that the thumbnail information has not been received, the control unit 201 repeats the process of this step.

  In step S <b> 806, the control unit 201 adds specific information included in the received thumbnail information to the thumbnail list stored in the work memory 204.

  In step S <b> 807, the control unit 201 refers to the received current mode state information and camera event information, and determines whether or not the current shooting mode is set in the digital camera 100. Note that the camera event information is referred to in the determination of this step when the camera event information is transmitted in response to the mode change even if the current mode state information indicates the shooting mode. Is to be considered. That is, when camera event information indicating a mode change is transmitted, the mode currently set in the digital camera 100 is a mode other than the shooting mode. If the control unit 201 determines that the shooting mode is currently set in the digital camera 100, the process proceeds to S808. If the control unit 201 determines that a mode other than the shooting mode is set, the process proceeds to S809.

  In step S808, if the wireless LAN communication unit 211 is set to the ON state, the control unit 201 sets the state to the OFF state and returns the process to step S506.

  On the other hand, if it is determined in S807 that a mode other than the current shooting mode is set in the digital camera 100, the control unit 201 determines in S809 whether or not specific information exists in the thumbnail list. If the control unit 201 determines that the specific information exists in the thumbnail list, the control unit 201 moves the process to S509. If it determines that the specific information does not exist, the control unit 201 returns the process to S506.

  When the communication connection with the digital camera 100 by the wireless LAN is established in S512, the control unit 201 selects one specific information among the specific information included in the thumbnail list in S810. Then, the control unit 201 makes a transmission request for image data specified by the specifying information via the wireless LAN communication unit 211.

  If it is determined in S514 that the reception of the image data related to the transmission request has been completed, the control unit 201 deletes the specific information corresponding to the received image data from the thumbnail list in S811.

  In step S812, the control unit 201 determines whether specific information exists in the thumbnail list as in step S809. If the control unit 201 determines that the specific information exists in the thumbnail list, the control unit 201 returns the process to step S810.

<Image transmission processing>
On the other hand, specific processing of the image transmission processing executed in the digital camera 100 in connection with the image data transmission / reception operation as shown in FIG. 7 will be described with reference to the flowchart of FIG. The processing corresponding to the flowchart can be realized by the camera control unit 101 reading the corresponding program from the camera non-volatile memory 103, developing it in the camera work memory 104, and executing it. The image receiving process will be described as being started when the synchronization mode is set in the digital camera 100. In the image transmission process of the present embodiment, the same reference numerals are assigned to the steps for performing the same process as the image transmission process of the first embodiment, and the description thereof is omitted. Keep on.

  When a Bluetooth communication connection is established with the mobile phone 200 in S604, the camera control unit 101 determines in S901 whether the camera Bluetooth communication unit 112 has received a transmission request for information on the current mode state from the mobile phone 200. Judging. If the camera control unit 101 determines that it has received a transmission request for information on the current mode state, it moves the process to S902, and if it determines that it has not received it, it repeats this step.

  In step S <b> 902, the camera control unit 101 generates information on the current mode state and transmits the information to the mobile phone 200 via the camera Bluetooth communication unit 112.

  In step S903, the camera control unit 101 determines whether an operation related to mode change has been performed. Specifically, the camera control unit 101 determines this step based on whether or not a control signal corresponding to the operation related to the mode change is received from the camera operation unit 105. If the camera control unit 101 determines that the operation related to the mode change has been performed, the process proceeds to S904. If the camera control unit 101 determines that the operation has not been performed, the process proceeds to S905.

  In step S <b> 904, the camera control unit 101 transmits camera event information indicating that the mode has been changed to the mobile phone 200 via the camera Bluetooth communication unit 112.

  In step S <b> 905, the camera control unit 101 determines whether the mode currently set for the digital camera 100 is the shooting mode. If the camera control unit 101 determines that the mode currently set in the digital camera 100 is the shooting mode, the process proceeds to S605. If the camera control unit 101 determines that the mode is other than the shooting mode, the process proceeds to S607.

  After transmitting camera event information indicating an image addition event in S606, the camera control unit 101 determines in S906 whether the camera Bluetooth communication unit 112 has received a transmission request for thumbnail information from the mobile phone 200. If the camera control unit 101 determines that a thumbnail information transmission request has been received, it moves the process to S907, transmits the corresponding thumbnail information to the mobile phone 200 via the camera Bluetooth communication unit 112, and then moves the process to S903. return. If the camera control unit 101 determines that a thumbnail information transmission request has not been received, the camera control unit 101 repeats the process of this step.

  On the other hand, if it is determined in S905 that the current mode of the digital camera 100 is a mode other than the shooting mode, after the processing of S607 to S615 is executed, the camera control unit 101 performs an operation for changing the mode in S908. It is determined whether or not. If the camera control unit 101 determines that an operation related to the mode change has been performed, the process proceeds to S909. If the camera control unit 101 determines that the operation has not been performed, the process returns to S610.

  In step S <b> 909, the camera control unit 101 discards the wireless LAN network formed in the camera wireless LAN communication unit 111, turns it off, and disconnects the communication connection. In step S <b> 910, the camera control unit 101 transmits camera event information indicating that the mode has been changed to the mobile phone 200 via the camera Bluetooth communication unit 112.

  As described above, by performing the image reception process in the mobile phone 200 and the image transmission process in the digital camera 100, the operation shown in the sequence diagram of FIG. 7 can be realized.

  In the image reception process of the present embodiment, since the thumbnail information is acquired before the image data is transmitted, for example, the image data related to the main body file is received on the GUI screen related to the synchronous application as shown in FIG. It may be displayed so that it can be discriminated. In FIG. 10, for the image data that has not been received, the received thumbnail image data is displayed together with a notification 1003 indicating that only the thumbnail image is received. For those that have received image data, the received image data is displayed as a display mode 1002 without a notification 1003. Of course, a notification indicating that may be displayed on the received image data. In FIG. 10, a status display 1001 displays the current connection state with the digital camera 100.

  In order to realize such a display mode, for example, after receiving the thumbnail information in S805 of FIG. 8, the control unit 201 generates screen data with a notification 1003 attached to the thumbnail image data included in the information. Then, it may be displayed on the display unit 206. In addition, after receiving the image data in S514, screen data in which the thumbnail image data and the notification 1003 are replaced by the image data may be generated and displayed on the display unit 206.

  In this way, the user can easily recognize whether or not the image data as the main body file has been received in the screen data displayed on the display unit 206. In addition, when image data is not transmitted due to communication disconnection or the like, it is possible to reduce the possibility that untransmitted image data is mistakenly received and deleted from the digital camera 100.

[Other Embodiments]
The present invention can also be realized by executing the following processing. That is, software (program) that realizes the functions of the above-described embodiments is supplied to a system or apparatus via a network or various storage media, and a computer (or CPU, MPU, or the like) of the system or apparatus reads the program. It is a process to be executed.

  In this case, the program code itself read from the storage medium realizes the functions of the above-described embodiments, and the program code and the storage medium storing the program code constitute the present invention.

  Moreover, the following can be used as a storage medium for supplying the program code. For example, floppy (registered trademark) disk, hard disk, magneto-optical disk, CD-ROM, CD-R, CD-RW, DVD-ROM, DVD-RAM, DVD-RW, DVD + RW, magnetic tape, nonvolatile memory card, ROM or the like. Alternatively, the program code may be downloaded via a network.

  Further, the present invention includes a case where the function of the above-described embodiment is realized by executing the program code read by the computer. In addition, an OS (operating system) running on the computer performs part or all of the actual processing based on the instruction of the program code, and the functions of the above-described embodiments are realized by the processing. Cases are also included.

  Furthermore, the present invention includes a case where the functions of the above-described embodiment are realized by the following processing. That is, the program code read from the storage medium is written in a memory provided in a function expansion board inserted into the computer or a function expansion unit connected to the computer. Thereafter, based on the instruction of the program code, the CPU or the like provided in the function expansion board or function expansion unit performs part or all of the actual processing.

Claims (13)

A transmission apparatus comprising: a first communication unit that performs wireless communication; and a second communication unit that performs wireless communication with less power consumption than the first communication unit,
A determination unit that determines whether or not a predetermined condition for transmitting data is satisfied while a communication connection via the second communication unit is established with a receiving device that is a transmission destination;
When the determination unit determines that the predetermined condition is satisfied, a notification that prompts establishment of a communication connection via the first communication unit is notified to the reception device via the second communication unit. Notification means;
Control means for transmitting data via the first communication means when a communication connection via the first communication means is established after the notification by the notification means. Transmitter device.   The notification means notifies the receiving device via the second communication means a notification prompting disconnection of the communication connection via the first communication means after completion of data transmission via the first communication means. The transmission device according to claim 1, wherein notification is performed. It further has an acquisition means for acquiring image data and recording it on a recording medium,
When the image data that has not been transmitted to the receiving device exists in the recording medium, or when the transmitting device is set to a mode in which the image data is not acquired by the acquiring unit, the predetermined value is set. The transmission apparatus according to claim 1, wherein the transmission apparatus determines that the condition is satisfied. It further has an acquisition means for acquiring image data and recording it on a recording medium,
The control means deletes the data from the recording medium after transmission of the data via the first communication means is completed when the recordable capacity of the recording medium falls below a threshold value. The transmission device according to any one of claims 1 to 3. It further has an acquisition means for acquiring image data and recording it on a recording medium,
The notification includes a notification indicating that new image data has been acquired,
When the communication connection through the first communication unit is established, the control unit sends the requested image data to the first image in response to a request for transmission of image data from the receiving device. The transmission apparatus according to claim 1, wherein the transmission is performed via a communication unit.   6. The transmission device according to claim 5, wherein the notification unit transmits a representative image of image data newly acquired together with the notification to the reception device via the second communication unit. It further has an acquisition means for acquiring image data and recording it on a recording medium,
The notification includes a notification indicating that new image data has been acquired, and a notification indicating that the recordable capacity of the recording medium has fallen below a threshold,
The control means deletes the data from the recording medium in response to a request to delete the data from the receiving device after transmission of the data via the first communication means is completed. The transmission device according to any one of claims 1 to 3, 5, and 6. A receiving apparatus comprising: a first communication unit that performs wireless communication; and a second communication unit that performs wireless communication with less power consumption than the first communication unit,
A communication connection via the first communication means in response to receiving a notification urging establishment of a communication connection via the first communication means from a transmitting device as a transmission source via the second communication means; And a control means for receiving data via the first communication means. A method for controlling a transmission apparatus, comprising: a first communication unit that performs wireless communication; and a second communication unit that performs wireless communication with less power consumption than the first communication unit,
Whether the determination unit of the transmission device satisfies a predetermined condition for transmitting data while the communication connection via the second communication unit is established with the reception device as a transmission destination A judging process for judging
When the notification unit of the transmission device determines that the predetermined condition is satisfied in the determination step, the second communication unit sends a notification prompting establishment of a communication connection via the first communication unit. A notification step of notifying the receiving device via
A control step in which the control means of the transmitting device performs data transmission via the first communication means when a communication connection via the first communication means is established after notification by the notification means; A method for controlling a transmitting apparatus. A control method for a receiving apparatus, comprising: a first communication unit that performs wireless communication; and a second communication unit that performs wireless communication with less power consumption than the first communication unit,
In response to the fact that the control means of the receiving device has received a notification urging establishment of a communication connection via the first communication means from the transmitting device that is the transmission source via the second communication means, A control method for a receiving apparatus, comprising: a control step of establishing a communication connection via one communication means and performing data reception via the first communication means.   The program for functioning a computer as each means of the transmission apparatus of any one of Claims 1 thru | or 7.   The program for functioning a computer as each means of the receiver of Claim 8. The transmission device and the reception device perform communication connection via a first communication unit that performs wireless communication and a second communication unit that performs wireless communication with lower power consumption than the first communication unit to transmit and receive data. A transmission / reception system,
The transmitter is
A determination means for determining whether or not a predetermined condition for transmitting data is established while a communication connection is established via the reception device and the second communication means;
When the determination unit determines that the predetermined condition is satisfied, a notification that prompts establishment of a communication connection via the first communication unit is notified to the reception device via the second communication unit. Notification means;
Control means for transmitting data via the first communication means when a communication connection via the first communication means is established after notification by the notification means;
The receiving device is:
A communication connection via the first communication means in response to receiving a notification urging establishment of a communication connection via the first communication means from a transmitting device as a transmission source via the second communication means; And a receiving means for receiving data via the first communication means.

Images