JP2014017770A - Radio communication device, its control method, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a radio communication device that can keep connection if disconnection notice and connection notice from an opposite device are given in series by a wireless LAN driver after completion of device connection processing with the opposite device in a simple access point mode.SOLUTION: After completion of connection with an opposite device in a simple access point mode, if a radio communication device receives disconnection notice from a device of which device connection processing is completed and, within a prescribed time, receives connection notice from the same device via a wireless LAN driver, the radio communication device keeps connection without performing end processing.

Description

  The present invention relates to device connection processing in a wireless communication apparatus.

  With the recent integration of wireless communication devices, wireless LANs have been installed not only in portable personal computers (so-called notebook PCs) but also in printers, personal digital assistants, digital cameras, mobile phones, smartphones, etc. . As a result, a device that has conventionally had only a wired communication means with a specific device such as a USB connection can perform data communication with various devices by having a wireless communication means. ing.

  In the case of wired communication, you can explicitly establish a connection with the desired device by connecting the device with a cable or the like, but in the case of wireless communication, you can visually check the connection status between the devices. I can't confirm. Therefore, when the user starts wireless communication, the user needs to operate the device to establish a connection. When a device is connected to a partner device using wireless communication, a wireless network to be connected is first selected to perform a wireless connection process, and then a connection partner device is selected to perform a device connection process. For example, when a digital camera and a smartphone are connected, data such as an image can be transmitted and received when the device connection process with the counterpart device is completed.

  As a connection method with a partner device, there is an infrastructure mode in which wireless communication is performed via a wireless access point, and an ad hoc mode in which a device generates a wireless network and directly connects to the partner device by joining the network to perform wireless communication. well known. Furthermore, there is a simple access point mode in which an access point is mounted on the device itself, and the access point is activated and another device joins the network to directly connect to perform wireless communication.

  Conventionally, after the device connection process is completed in the infrastructure mode or the ad hoc mode, when a disconnection notification from the connection partner device is notified from the wireless LAN driver, a termination process such as a wireless disconnection is performed. However, after starting in the simple access point mode and completing the device connection with the connection partner device, the connection notification may be notified immediately after the disconnection notification from the connection partner device is notified. In this case, since the disconnection notification and the connection notification are continuously notified, it is considered that the connection partner device wants to maintain the connection. However, since the termination processing is performed when the disconnection notification is notified, for example, image transmission is performed. In the case of inside, there is a problem that the image ends without being sent.

  Here, in general, as a process when communication is disconnected, the wireless communication connection is re-established when a transmission processing request is accepted after the wireless communication connection with the communication partner is disconnected and the communication is suspended. The technique to establish is known (patent document 1).

JP 2011-55028 A

  However, in the prior art disclosed in the above-mentioned patent document, since it is a procedure of disconnecting once and reconnecting, it takes time to reconnect.

  In order to solve the above-described problem, a wireless communication device according to the present invention includes a wireless network connection unit that establishes a connection with a wireless network, a device connection unit that establishes a device connection with a counterpart device in the wireless network, Wireless control event receiving means for receiving a wireless control event output by the function of the wireless LAN driver, termination means for terminating the wireless connection, connection with the wireless network is completed by the wireless network connection means, and the device connection If the wireless control event receiving unit receives a disconnection notification from the connection partner device after the device connection processing is completed by the unit, and if the connection unit does not receive a connection notification within a predetermined time, the end When the termination processing is performed by the means and the connection notification is received by the receiving means within a predetermined time And having a control means for controlling so ends the process to maintain the connection without.

  According to the present invention, even when a disconnection notification and a connection notification from a connection partner device are continuously notified, the connection can be maintained without performing the termination process.

1 is a diagram illustrating a system configuration of a digital camera according to an embodiment of the present invention. It is the figure which showed the system configuration | structure of the smart phone which concerns on embodiment of this invention. 1 is a network topology diagram according to a first embodiment of the present invention. It is the flowchart figure which showed the flow of the connection process in the digital camera which concerns on the 1st Embodiment of this invention. It is the flowchart figure which showed the flow of the process of MAC address storage of the connection other party apparatus in the digital camera which concerns on the 1st Embodiment of this invention. It is an example of the ARP table memorize | stored in the digital camera which concerns on the 1st Embodiment of this invention. It is the flowchart figure which showed the flow of the connection process in the smart phone which concerns on the 1st Embodiment of this invention. It is the flowchart figure which showed the flow of the process at the time of the radio | wireless control event reception based on the 1st, 2nd embodiment of this invention. It is the flowchart figure which showed the flow of the comparison process of the MAC address which concerns on the 1st, 2nd embodiment of this invention. It is a network topology figure concerning the 2nd Embodiment of this invention. It is an example of the ARP table memorize | stored in the digital camera which concerns on the 2nd Embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. Hereinafter, a case where a digital camera and a smartphone are connected to each other will be described as an example.

<First Embodiment>
FIG. 1 is a diagram illustrating a configuration of a digital camera 100 that is an example of a wireless communication device according to an embodiment of the present invention.

  Reference numeral 10 denotes a lens barrier, 11 denotes a photographing lens, and 12 denotes a shutter having a diaphragm function, which are controlled by the imaging control means 13.

  Reference numeral 14 denotes an image sensor that converts an optical image into an electrical signal 100, and 15 denotes an image processing circuit, which performs predetermined pixel interpolation processing and color conversion processing on data from the image sensor 14 or data from the memory control circuit 16. .

  Reference numeral 16 denotes a memory control circuit. Data of the image sensor 14 is A / D converted by the image processing circuit 15 and written to the memory 18.

  Reference numeral 17 denotes an image display unit composed of a TFT LCD or the like. Display image data written in the memory 18 is D / A converted and displayed on the image display unit 17.

  Reference numeral 18 denotes a memory for storing captured still images and moving images, and has a sufficient storage capacity to store a predetermined number of still images and a predetermined time of moving images.

  Thereby, even in the case of continuous shooting or panoramic shooting in which a plurality of still images are continuously shot, it is possible to write a large amount of images to the memory 18 at high speed.

  The memory 18 can also be used as a work area for the system control circuit 50.

  Reference numeral 50 denotes a system control that executes various processes necessary for the present embodiment, such as a subject recognition process for a captured image, a process for collating a subject recognition result with management data, and a status data generation process, and also controls the entire digital camera 100. Circuit. Reference numeral 51 denotes a memory for storing constants, variables, programs and the like for operating the system control circuit 50.

  An image processing unit 52 performs various image processing such as resizing a still image.

  Reference numeral 60 denotes a communication control unit which controls a communication function with an external device and is connected to the antenna 61.

  Reference numeral 70 denotes an operation means for inputting various operation instructions of the system control circuit 50, and is configured by a single or a combination of a switch, a dial, a touch panel, pointing by eye-gaze detection, a voice recognition device, or the like.

  Reference numeral 71 denotes a timer used for measuring a data recording speed and a data rate of data to be acquired.

  Reference numeral 90 denotes a card controller that transmits and receives data to and from an external storage medium such as a memory card, 91 denotes an interface with the external storage medium such as a memory card, and 92 denotes a connector that connects to the external storage medium such as a memory card. Reference numeral 93 denotes an external storage medium such as a memory card, and 94 denotes storage medium attachment / detachment detection means for detecting whether or not the external storage medium 93 is attached to the connector 92.

  The overall system configuration of the digital camera 100 has been described above.

  FIG. 2 is a diagram illustrating a configuration of a smartphone 200 that is an example of the wireless communication device according to the embodiment of the present invention.

  A public network communication unit 201 communicates with a public network such as a 3G line and is connected to the public network antenna 202.

  Reference numeral 203 denotes a display unit that displays information for the user by LCD display, LED display, and the like, and is processed by the display processing unit 204.

  Reference numeral 205 denotes an operation unit, which is an operation unit for inputting various operation instructions configured by a single or a plurality of combinations such as a switch, a dial, a touch panel, and a voice recognition device via the system controller 206.

  Reference numeral 207 denotes an electrically erasable / recordable nonvolatile memory. A memory 208 stores constants, variables, programs, and the like for operating the smartphone.

  Reference numeral 209 denotes a card controller that transmits / receives data to / from an external storage medium such as a memory card, and 210 denotes an interface with the external storage medium such as a memory card.

  211 is a wireless LAN communication means, and 212 is a Bluetooth (registered trademark) communication means, both of which are connected to the antenna 213.

  Reference numeral 214 denotes GPS communication means for acquiring position information, and is connected to the GPS antenna 215.

  Reference numeral 216 denotes a USB device interface for connecting to an external device such as a PC using a USB.

  Reference numeral 217 denotes an audio processing unit which processes audio data acquired from the microphone 218 and outputs the processed audio data via the speaker 219.

  The above is the overall system configuration of the smartphone 200.

  The operation of the embodiment of the present invention will be described with reference to FIGS. In the present embodiment, processing when only one smartphone 200 is allowed to participate in the simple access point of the digital camera 100 will be described. It is assumed that a plurality of devices can be wirelessly connected to a simple access point of a digital camera.

  FIG. 3 is a network topology diagram in this embodiment. As shown in FIG. 3, it is assumed that only one smartphone A participates in the simple access point of the digital camera A. As shown in FIG. 3, regarding the MAC address, the digital camera A is 12: 34: 56: 78: 90: ab, and the smartphone A is 12: 34: 56: 78: 90: ab. As for IP addresses, 192.168.0.1 is assigned to the digital camera A, and 192.168.0.2 is assigned to the smartphone A.

  A flow of connecting the digital camera A and the smartphone A to each other will be described with reference to FIGS. First, connection processing on the digital camera side will be described. FIG. 4 is a flowchart showing a processing flow of the digital camera when the digital camera and the smartphone according to the present embodiment are connected to each other. Each process in this flowchart is realized by the system control circuit 50 expanding and executing a program stored in the nonvolatile memory 51 in the memory 18.

  First, the wireless network connection process is started. In step S <b> 401, the user selects a desired communication mode from the communication modes using the operation unit 70. The system control circuit 50 stores the communication mode selected by the user in the memory 18, and proceeds to S402. As communication modes, there are an infrastructure mode in which connection is made via an access point and a simple access point mode in which the terminal itself becomes an access point and makes a peer-to-peer connection. In the present embodiment, it is assumed that the simple access point mode is selected as the communication mode by the user.

  In S402, the system control circuit 50 determines whether or not the communication mode selected by the user is the simple access point mode. If it is determined in S402 that the mode is the simple access point mode, the process proceeds to S403. If it is determined in S402 that the mode is not the simple access point mode, the process proceeds to S407. In this embodiment, since the simple access point mode is selected as the communication mode by the user, the process proceeds to S403.

  In S403, the system control circuit 50 generates an ESSID and a passphrase used when starting the simple access point, and the process proceeds to S404.

  In step S404, the system control circuit 50 displays the ESSID and passphrase generated in step S403 on the image display unit 17, and the process proceeds to step S405. By setting the ESSID and passphrase displayed on the image display unit 17 by the user on the smartphone side, the user can connect to a simple access point where the digital camera A is activated. The connection process on the smartphone side will be described later.

  In S405, the system control circuit 50 uses the communication control means 60 to activate the simple access point using the ESSID and passphrase generated in S403, and proceeds to S406.

  In S406, the system control circuit 50 activates the DHCP server using the communication control means 60, and proceeds to S408. The DHCP server has a function of assigning an IP address to a device that has joined the activated simple access point. As shown in FIG. 3, it is assumed that the digital camera sets its own IP address to 192.168.0.1.

  If it is determined in S402 that the mode is not the simple access point mode, that is, if the infrastructure mode is selected by the user, in S407, the system control circuit 50 performs connection processing to the access point, and proceeds to S408. In the present embodiment, the process in the simple access point mode will be described, and details of the infrastructure mode connection process will be omitted.

  In S408, device connection processing is started. The system control circuit 50 proceeds to S409 using the communication control means 60. The device search process is realized by using a protocol such as UPnP (Universal Plug and Play) or mDNS (multicast DNS).

  In step S409, the system control circuit 50 determines whether a partner device has been found. If it is determined in S409 that a partner device has been found, the process proceeds to S410. If it is determined in S409 that no partner device has been found, the process returns to S409.

  In S410, the system control circuit 50 displays the partner device list found in S409 on the image display unit 17, and proceeds to S411.

  In step S411, the user selects a desired connection partner device from the discovered partner device list using the operation unit 70, and the process advances to step S412.

  In S412, the system control circuit 50 determines whether or not the communication mode selected by the user in S401 is the simple access point mode. If it is determined in S412 that the mode is the simple access point mode, the process proceeds to S413. If it is determined that the mode is not the simple access point mode, the process proceeds to S414. In the present embodiment, the process proceeds to S413 in order to describe the case where the simple access point mode is selected.

  In S413, the system control circuit 50 stores the IP address of the connection partner device selected by the user in S411 in the memory 18, and proceeds to S414. The IP address of the connection partner device can be acquired as one piece of information of the discovered device when the device is discovered in S409. The system control circuit 50 stores the IP address of the connection partner device selected by the user from the device information in the memory 18. As shown in FIG. 3, in this embodiment, the IP address of the connection partner device is 192.168.0.2.

  In S414, the system control circuit 50 uses the communication control means 60 to perform device connection processing for the partner connection device selected by the user in S411, and proceeds to S415. The device connection process is to establish a connection at a protocol level for performing image transmission / reception with a wireless device in a wireless network.

  In S415, the system control circuit 50 uses the communication control unit 60 to determine whether or not the device connection process with the connection partner device is completed. If it is determined that the device connection process has been completed, the process proceeds to S416. If it is determined that the device connection process has not been completed, the process returns to S415.

  In S416, the system control circuit 50 determines whether or not the communication mode selected by the user in S401 is the simple access point mode. If it is determined in S416 that the mode is the simple access point mode, the process proceeds to S417. If it is determined that the mode is not the simple access point mode, the connection process is terminated. In the present embodiment, the process proceeds to S417 in order to describe the case where the simple access point mode is selected.

  In S417, the system control circuit 50 stores the MAC address of the connection partner device in the memory 18, and ends the connection process. A method for storing the MAC address of the connected device will be described with reference to FIGS.

  FIG. 5 is a flowchart showing the flow of the MAC address acquisition process of the connected device in the digital camera according to this embodiment. Each process in this flowchart is realized by the system control circuit 50 expanding and executing a program stored in the nonvolatile memory 51 in the memory 18.

  First, in S501, the system control circuit 50 acquires the IP address of the connection partner device stored in the memory 18 in S413, and proceeds to S502. In this embodiment, 192.168.0.2 is acquired as the IP address of the connection partner device.

  In S502, the system control circuit 50 refers to the ARP table stored in the memory 18, and proceeds to S503. The ARP table is a correspondence table between IP addresses and MAC addresses of connection partner devices. The ARP table is registered or updated when an ARP request packet is received and when an ARP response packet is received. FIG. 6 is an example of an ARP table in the present embodiment. In the present embodiment, since the digital camera A communicates only with the smartphone A, an ARP table as shown in FIG. 6 is constructed.

  In S503, the system control circuit 50 refers to the ARP table, acquires the MAC address corresponding to the IP address of the connection partner device acquired in S501, and proceeds to S504. In the present embodiment, since the IP address acquired in S501 is 192.168.0.2, referring to the ARP table shown in FIG. 6, the MAC address ab: cd corresponding to the IP address 192.168.0.2. : Ef: 12: 34: 56 can be acquired.

  In step S504, the system control circuit 50 stores the MAC address of the connection counterpart device acquired in step S503 in the memory 18, and ends the MAC address storage process.

  Next, connection processing on the smartphone A side will be described. FIG. 7 is a flowchart illustrating a process flow of the smartphone when connecting the digital camera and the smartphone according to the present embodiment. Each process in this flowchart is realized by the system control circuit 50 expanding and executing a program stored in the nonvolatile memory 51 in the memory 18.

  First, in S701, the user selects a network to be connected using the operation unit 205 from the networks displayed on the display unit 203 in the network selection of the smartphone, and proceeds to S411. In this embodiment, since the smartphone A participates in the simple access point of the digital camera A, the network of the ESSID displayed on the image display unit 17 of the digital camera in S404 of FIG. 4 is selected on the network selection screen of the smartphone.

  In S702, the user inputs the network passphrase selected in S701 using the operation unit 205, and the process proceeds to S703. The passphrase of the simple access point is displayed together with the ESSID on the image display unit 17 of the digital camera in S404 of FIG.

  In step S703, the system controller 206 performs network participation processing based on the network and passphrase selected and input in steps S701 and S702 using the wireless LAN communication unit 211, and proceeds to step S704.

  When the network participation process is completed, in step S704, the system controller 206 performs DHCP addressing using the wireless LAN communication unit 211, and proceeds to step S705. DHCP addressing is a method for obtaining an IP address by requesting an IP address from a DHCP server on a wireless network. In this embodiment, a DHCP server is mounted on the digital camera. The IP address assigned by the DHCP server of the digital camera is 192.168.0.2.

  In S705, the user activates a dedicated application using the operation unit 205, and the process proceeds to S706. In this embodiment, it is assumed that a dedicated application is required to connect the digital camera and the smartphone.

  In step S706, the system controller 206 performs device connection processing with the digital camera using the wireless LAN communication unit 211, and ends the connection processing on the smartphone side. When the device connection process between the digital camera and the smartphone is completed, the image can be transmitted and received, and the image inside the digital camera can be viewed from the smartphone.

  Next, control when a wireless control event is notified at the simple access point of the digital camera after the device connection process between the digital camera A and the smartphone A is completed will be described. Here, the wireless control event is an event notified to the host from the wireless LAN driver. For example, a connection notification is notified when a partner device is connected to the network, and a disconnection notification is notified when the device is disconnected from the network. . Normally, when a disconnection notification is notified from the wireless LAN driver, it is determined that the connection is disconnected at the upper level and the termination process is performed. However, when the simple access point is activated, a disconnection notification and a connection notification from the same connection partner device may be continuously notified from the wireless LAN driver. One reason is that the radio wave condition was bad and the connection was cut off for a moment and then reconnected. The second case is when the smartphone throws a connection packet on the assumption that it has been disconnected from the simple access point. In this case, the wireless LAN driver may continuously receive disconnection notifications and connection notifications in order to perform an operation of determining that connection packets have been received continuously and disconnecting and then connecting again. When the disconnection notification and the connection notification are continuously notified, the termination processing is performed at the time when the disconnection notification is notified conventionally. However, when the disconnection notification is continuously notified, it is desirable to maintain the connection as it is. Therefore, a process when a wireless control event is notified will be described with reference to FIG. Hereinafter, a process after the device connection process between the digital camera A and the smartphone A is completed will be described. Specifically, the description is divided into two cases: a case where a disconnection notification and connection notification from the smartphone A are continuously notified from the wireless LAN driver, and a case where only the disconnection notification from the smartphone A is notified from the wireless LAN driver. To do.

  FIG. 8 is a flowchart showing the flow of processing when a wireless control event is received in the simple access point mode of the digital camera. Each process in this flowchart is realized by the system control circuit 50 expanding and executing a program stored in the nonvolatile memory 51 in the memory 18.

  First, a case will be described in which after the device connection process between the digital camera A and the smartphone A is completed, a disconnection notification and a connection notification from the smartphone A are continuously notified from the wireless LAN driver.

  In step S801, the system control circuit 50 determines whether a wireless control event is notified from the wireless LAN driver. If it is determined that a wireless control event has been notified from the wireless LAN driver, the process proceeds to S802. If it is determined that a wireless control event has not been notified from the wireless LAN driver, the process returns to S801.

  In step S <b> 802, the system control circuit 50 uses the communication control unit 60 to determine whether the digital camera and the smartphone are in a device connection complete state. The device connection completion state indicates a state in which connection at the protocol level for transmitting and receiving images is completed as well as participation in the network. If it is determined that the device connection is complete, the process proceeds to S803. If it is determined that the device connection is not complete, the notified wireless control event is ignored and the process returns to S801.

  In step S803, the system control circuit 50 determines whether the wireless control event notified from the wireless LAN driver in step S801 is a disconnection notification. If the wireless control event notified from the wireless LAN driver is a disconnection notification, the process proceeds to step S804. If the wireless control event notified from the wireless LAN driver is not a disconnection notification, that is, if it is a connection notification, the notification is sent. The wireless control event is ignored and the process returns to S801.

  In step S804, the system control circuit 50 performs a MAC address comparison process, and proceeds to step S805. Details will be described with reference to FIG.

  FIG. 9 is a flowchart showing the flow of MAC address comparison processing in the digital camera. Each process in this flowchart is realized by the system control circuit 50 expanding and executing a program stored in the nonvolatile memory 51 in the memory 18.

  First, in S901, the system control circuit 50 acquires the MAC address of the wireless control event notified from the wireless LAN driver, stores the MAC address in the memory 18, and proceeds to S902. In this embodiment, since the transmission source of the wireless control event notified from the wireless LAN driver is the smartphone A, ab: cd: ef: 12: 34: 56 is stored in the memory 18 as the MAC address.

  In S902, the system control circuit 50 compares the MAC address of the wireless control event acquired in S901 with the MAC address of the connection partner device stored in S417 of the connection process in FIG. finish. Here, the MAC address ab: cd: ef: 12: 34: 56 of the connection partner device (smart phone A) is compared with the source MAC address ab: cd: ef: 12: 34: 56 of the control event.

  Next, in S805 of FIG. 8, the system control circuit 50 determines whether or not the MAC addresses compared in S804 are the same. If the MAC addresses are the same, the process proceeds to S806. If the MAC addresses are not the same, the wireless control event is ignored and the process returns to S801. Here, since the MAC address of the connection partner device is the same as the source MAC address of the disconnection notification, the process proceeds to S806.

  In step S806, the system control circuit 50 starts the timer 71 and proceeds to step S807.

  In step S807, the system control circuit 50 determines whether a wireless control event is notified from the wireless LAN driver. If it is determined that a wireless control event has been notified from the wireless LAN driver, the process proceeds to S808. If it is determined that a wireless control event has not been notified from the wireless LAN driver, the process proceeds to S812. Here, since the disconnection notification and the connection notification are continuously notified from the wireless LAN driver, the process proceeds to S808.

  In step S808, the system control circuit 50 determines whether or not the wireless control event notified from the wireless LAN driver in step S807 is a connection notification. If the wireless control event notified from the wireless LAN driver is a connection notification, the process proceeds to S809. If the wireless control event notified from the wireless LAN driver is not a connection notification, that is, if it is a disconnection notification, the process proceeds to S812. . Here, since the disconnection notification and the connection notification are continuously notified from the wireless LAN driver, the process proceeds to S809.

  In step S809, the system control circuit 50 compares the transmission source MAC address of the wireless control event with the MAC address of the connected device, and proceeds to step S810. Details have been described in step S804, and will be omitted.

  In S810, the system control circuit 50 determines whether or not the MAC addresses compared in S809 are the same. If the MAC addresses are the same, the process proceeds to S811, and if the MAC addresses are not the same, the process proceeds to S812. Here, since the MAC address of the connection partner device is the same as the source MAC address of the connection notification, the process proceeds to S811.

  In S811, the system control circuit 50 stops the timer 71 and returns to S801.

  As described above, when a connection notification from the same transmission source is notified within a predetermined time after the disconnection notification is notified from the wireless LAN driver, no processing is performed. Between the disconnection notification and the connection notification, the connection partner device is disconnected from the network, but the connection at the higher protocol level is maintained.

  Next, a case where only the disconnection notification from the smartphone A is notified from the wireless LAN driver after the device connection process between the digital camera A and the smartphone A is completed will be described.

  Regarding S801 to S806, the disconnection notification is received in the same manner as when the disconnection notification and the connection notification are continuously received from the wireless LAN driver, and the processing is the same, so the details will be omitted and will be described from S807.

  In step S807, the system control circuit 50 determines whether a wireless control event is notified from the wireless LAN driver. If it is determined that a wireless control event has been notified from the wireless LAN driver, the process proceeds to S808. If it is determined that a wireless control event has not been notified from the wireless LAN driver, the process proceeds to S812. Here, since only the disconnection notification is notified from the wireless LAN driver, the process proceeds to S812.

  In step S812, the system control circuit 50 refers to the timer 71 and determines whether the timer has timed out. If it is determined that the timer has timed out, the process proceeds to S813. If it is determined that the timer has not timed out, the process returns to S807. Here, it is determined that the timer has timed out, and the process proceeds to S813.

  In step S813, the system control circuit 50 performs a termination process using the communication control unit 60, and terminates the process when the wireless control event is received. The termination process is a process of disconnecting the connection at the higher protocol level, disconnecting the connection at the lower wireless driver level, and turning off the wireless module.

  As described above, when the connection notification from the same transmission source is not notified within a predetermined time after the connection notification is notified from the wireless LAN driver, the wireless end processing is performed.

  As described above, according to the present embodiment, when only one smartphone is connected to the simple access point of the digital camera, the connection from the same transmission source is received within a predetermined time after the disconnection notification is notified from the wireless LAN driver. If the notification is notified, the connection is maintained. As a result, even when the disconnection notification and the connection notification are continuously notified during image transmission / reception, the image transmission / reception can be continued without being disconnected.

  Further, by performing the process at the time of the wireless control event notification only in the simple access point mode, the termination process can be performed immediately after the connection notification is notified in the infrastructure mode.

  Assuming that a plurality of devices can participate in the simple access point mounted on the digital camera, the process of storing the MAC address of the connection partner device in S417 in FIG. 4, the MAC in S804 and S809 in FIG. Address comparison processing is performed. However, when only one device can participate in the simple access point, there is no need to perform MAC address storage and comparison processing. When only one device can participate, only the disconnection notification and connection notification from the participating device are notified, and it is not necessary to determine whether the same device is based on the MAC address. However, if another device connects immediately after disconnection, it enters the processing of the wireless control event, but since it is another device in the first place, the connection cannot be maintained even at the protocol level, so the termination process is not performed. Will be cut off at the top. By doing in this way, when only one device can participate in the simple access point, it is possible to reduce the processing time for the processing related to the MAC address.

<Second Embodiment>
In the second embodiment, a process when three smart phones 200 are allowed to participate in the simple access point of the digital camera 100 will be described.

  FIG. 10 is a network topology diagram in this embodiment. As shown in FIG. 10, it is assumed that three smartphones A, B, and C participate in the digital camera A that activates the simple access point. Further, as shown in FIG. 10, the digital camera A is 12: 34: 56: 78: 90: ab with respect to the MAC address. The smartphone A is ab: cd: ef: 12: 34: 56, the smartphone B is 12: 23: 34: 56: 78: 90, and the smartphone C is 13: 57: 90: ab: cd: ef. The IP address is 192.168.0.1 for the digital camera A. The smartphone A is assigned 192.168.0.2, the smartphone B is assigned 192.168.0.3, and the smartphone C is assigned 192.168.0.4. A smartphone that performs a protocol level connection for transmitting and receiving images to and from the digital camera A is a smartphone A. The other smartphones B and C only participate in the simple access point of the digital camera A.

  Since the flow for connecting the digital camera A and the smartphone A is the same as the flow described in the first embodiment, a description thereof will be omitted. However, the ARP table referred to when storing the MAC address of the connection partner device in S417 in the flowchart of FIG. 4 is as shown in FIG. FIG. 11 is an ARP table when the smartphones A to C participate in the simple access point of the digital camera A. In S417, the system control circuit 50 refers to the ARP table and stores the MAC address ab: cd: ef: 12: 34: 56 corresponding to the IP address 192.168.0.2 of the smartphone A in the memory 18. .

  For smartphone B and smartphone C, processing is performed up to S704 in FIG. That is, only the simple access point of the digital camera A is joined, and the device connection process is not performed.

  First, after the device connection process between the digital camera A and the smartphone A is completed, a disconnection notification from the smartphone A, a connection notification from the smartphone B, and a connection notification from the smartphone A are continuously notified from the wireless LAN driver. explain.

  Since the process when the disconnection notification from the smartphone A is notified from the wireless LAN driver is the same as S801 to S806 of FIG. 8 described in the first embodiment, the details will be omitted and will be described from S807.

  In step S807, the system control circuit 50 determines whether a wireless control event is notified from the wireless LAN driver. If it is determined that a wireless control event has been notified from the wireless LAN driver, the process proceeds to S808. If it is determined that a wireless control event has not been notified from the wireless LAN driver, the process proceeds to S812. Here, since the connection notification from the smartphone B is notified from the wireless LAN driver, the process proceeds to S808.

  In step S808, the system control circuit 50 determines whether or not the wireless control event notified from the wireless LAN driver in step S807 is a connection notification. If the wireless control event notified from the wireless LAN driver is a connection notification, the process proceeds to S809. If the wireless control event notified from the wireless LAN driver is not a connection notification, that is, if it is a disconnection notification, the process proceeds to S812. . Here, since the connection notification from the smartphone B is notified from the wireless LAN driver, the process proceeds to S809.

  In step S809, the system control circuit 50 compares the transmission source MAC address of the wireless control event with the MAC address of the connected device, and proceeds to step S810. Details have been described in the first embodiment, and will be omitted.

  In S810, the system control circuit 50 determines whether or not the MAC addresses compared in S809 are the same. If the MAC addresses are the same, the process proceeds to S811, and if the MAC addresses are not the same, the process proceeds to S812. Here, the source MAC address of the wireless control event is 12: 23: 34: 56: 78: 90, the MAC address of the connection partner device is ab: cd: ef: 12: 34: 56, and the MAC addresses are the same. Since there is not, it progresses to S812.

  In step S812, the system control circuit 50 refers to the timer 71 and determines whether the timer has timed out. If it is determined that the timer has timed out, the process proceeds to S813. If it is determined that the timer has not timed out, the process returns to S807. Here, since the timer has not timed out, the process returns to S807.

  Next, since a connection notification from the smartphone A is notified from the wireless LAN driver, processing is performed in the order of S807⇒S808⇒S809⇒S810. Details are omitted.

  In S810, the system control circuit 50 determines whether or not the MAC addresses compared in S809 are the same. If the MAC addresses are the same, the process proceeds to S811, and if the MAC addresses are not the same, the process proceeds to S812. Here, the source MAC address of the wireless control event is ab: cd: ef: 12: 34: 56, the MAC address of the connected device is ab: cd: ef: 12: 34: 56, and the MAC address is the same. Since there is, it progresses to S811.

  In S811, the system control circuit 50 stops the timer 71 and returns to S801.

  As described above, the disconnection notification from the device that has completed the device connection processing and the connection notification are continuously notified from the wireless LAN driver. There is no effect even if the device is joined to the network. Moreover, although the case where the notification of connection from another apparatus was notified was demonstrated, it is the same also when the notification of disconnection is notified.

  Next, a case where a disconnection notification from the smartphone B is notified from the wireless LAN driver after the device connection process between the digital camera A and the smartphone A is completed will be described.

  Since the disconnection notification from the smartphone B is notified from the wireless LAN driver, the processing is performed in the order of S801⇒S802⇒S803⇒S804⇒S805 in FIG. Details are omitted.

  In step S805, the system control circuit 50 determines whether the MAC addresses compared in step S804 are the same. If the MAC addresses are the same, the process proceeds to S806, and if the MAC addresses are not the same, the process returns to S801. Here, the source MAC address of the wireless control event is 12: 23: 34: 56: 78: 90, the MAC address of the connection partner device is ab: cd: ef: 12: 34: 56, and the MAC addresses are the same. Therefore, the process returns to S801 and no processing is performed.

  As described above, even when a disconnection notification from another device that is not a device that has completed the device connection process is notified from the wireless LAN driver, it is ignored, so there is no effect even when another device participates in the network. . Moreover, although the case where the notification of disconnection from another apparatus was notified was demonstrated, it is the same also when the notification of connection is notified.

  As described above, according to the present embodiment, even when multiple smartphones participate in the simple access point that the digital camera starts, disconnection from other devices that are not devices that have completed the device connection process Ignored if a notification or connection notification is sent. Therefore, there is no effect even when a plurality of simple access point networks participate.

  As described above, according to the present invention, after the device connection process is completed, a disconnection notification from the counterpart device is notified from the wireless LAN driver, and a connection notification from the same transmission source is notified within a predetermined time. In this case, the connection is maintained without performing the termination process. Thus, even when a disconnection notification and connection notification are continuously notified from the wireless LAN driver during image transmission / reception, image transmission / reception can be continued without disconnection. In addition, even when multiple smartphones are participating in the simple access point that the digital camera starts up, disconnection notifications and connection notifications from devices other than devices that have completed device connection processing are ignored, so multiple devices participate in the network. Even if it is, there is no effect.

  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.

Claims (8)

Wireless network connection means for establishing a connection with a wireless network;
Device connection means for establishing device connection with a counterpart device in the wireless network;
A wireless control event receiving means for receiving a wireless control event output by the function of the wireless LAN driver;
Termination means for terminating the wireless connection;
When a connection with a wireless network is completed by the wireless network connection means, and a disconnection notification is received from the counterpart device by the wireless control event receiving means after the device connection processing is completed by the device connection means, a further predetermined time If no connection notification is received by the receiving means, the termination means performs termination processing. If the connection notification is received by the receiving means within a predetermined time, the termination processing is not performed and the connection is maintained. And a control means for controlling the wireless communication device.   The control means controls the wireless control event from the counterpart device for which the device connection processing has been completed by the device connection means, and is connected to the wireless network by the wireless network connection means. The wireless communication device according to claim 1, wherein a wireless control event from a wireless device that is not connected is ignored. MAC address acquisition means for acquiring the MAC address of the counterpart device for which device connection processing has been completed by the device connection means;
MAC address comparison means for comparing the MAC address of the counterpart device acquired by the MAC address acquisition means and the transmission source MAC address of the radio control event,
The control unit ignores the radio control event when the MAC address comparison unit determines that the MAC address of the counterpart device is different from the transmission source MAC address of the radio control event. 2. A wireless communication device according to 2. The MAC address acquisition means includes
4. The wireless communication device according to claim 3, wherein the corresponding MAC address is obtained by referring to the ARP table based on the IP address of the counterpart device when the device is found by device search.   The wireless communication device according to claim 3 or 4, wherein after the device connection processing with the counterpart device is completed by the device connection means, the MAC address of the counterpart device is acquired by the MAC address acquisition means.   The wireless communication device according to any one of claims 1 to 5, wherein a wireless control event is ignored until a device connection process with a counterpart device is completed by the device connection means. A method for controlling a wireless communication device,
A wireless network connection step for establishing a connection with a wireless network, a device connection step for establishing a device connection with a counterpart device in the wireless network, and a wireless control event reception for receiving a wireless control event output by the function of the wireless LAN driver Process,
A termination step for terminating the wireless connection;
When a connection with a wireless network is completed in the wireless network connection step and a disconnection notification is received from the counterpart device in the wireless control event reception step after the device connection processing is completed in the device connection step, a further predetermined time If the connection notification is not received in the reception step, the termination processing is performed in the termination step. If the connection notification is received in the reception step within a predetermined time, the termination processing is not performed and the connection is maintained. A wireless communication device characterized by that.   A program that can be executed by a computer that causes the computer to function as each unit of the wireless communication device according to any one of claims 1 to 6.

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