JP2006093882A - Radio communication device, control method thereof, and radio communication system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To permit data to be transmitted to one radio terminal unit when data transmission requests are generated from a plurality of radio terminal units that are connected via a radio network to a wireless outputting device. <P>SOLUTION: In a radio communication system in which a plurality of wireless digital cameras are connected to a wireless printer via a radio network, an aim for occupying connection to a printer 601 is inquired when a digital camera 602 transmits data to the printer 601. When connection can be occupied in the printer 601, the aim is notified, the digital camera 602 transmits data continuously, and the printer 601 rejects a data transmission request from the other digital camera 603. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a technique for controlling data transmission between wireless terminal devices connected via a wireless network.

  In recent years, with the widespread use of digital cameras, printing can be easily enjoyed by preparing a printer or the like at home or in the office. Generally, image data is output to a printer after being edited and processed by a personal computer (PC). Recently, however, due to the demands of users unfamiliar with PCs, as shown in FIG. 1, an inkjet printer that can be directly printed by connecting the digital camera 102 and the printer 101 directly via the cable 103 without using a PC has been commercialized. Has been. This direct printing function is standardized so that output can be performed between digital cameras and printers of different manufacturers in cooperation with a plurality of manufacturers.

  Furthermore, some inkjet printers have built-in wireless LAN functions such as IEEE 802.11b / a / g. Such a printer is positioned as a network printer in a home or office. Further, as a usage method, for example, as shown in FIG. 2, a wireless network is individually formed by SSIDs (Service Set Identifiers) from wireless terminals (notebook personal computers) 204 and 205 having an arbitrary wireless function. In the infrastructure mode in which print data is output to the printer 203 via the wireless access point 202, or as shown in FIG. 3, an IBSS (Independent BSS: ad hoc network) is formed without using an access point. There is a mode in an ad hoc mode in which print data is transmitted directly from the wireless terminals (such as notebook computers) 302 and 303 to the printer 301.

  In a wireless LAN system, the access point and the wireless terminal must always set the same SSID. This needs to be set in consideration of the difference in network configuration such as ad hoc mode and infrastructure mode, and is good for users who are used to a certain degree of PC, but has not been suitable for beginners.

  However, recently, some applications on the terminal side automatically generate a list of connectable access points by automatically detecting multiple nearby SSIDs, and allow users to select the access point to connect to. is there. By supporting the wireless LAN setting by such an application, if the security by encryption such as WEP (Wired Equivalent Privacy) is ignored, the user can connect to the network almost automatically without performing complicated operations. Can be completed.

  For these reasons, wireless LAN systems compliant with IEEE 802.11x, such as IEEE 802.11b / a / g, are becoming more popular in the home use in recent years, as are digital cameras and inkjet printers. For the purpose of responding to various needs of users, a digital camera with a built-in wireless function has also been proposed (see, for example, Patent Document 1).

  In addition, the IEEE 802.11x wireless LAN used in the wireless LAN system has a power management function (power saving (PS) mode) in order to suppress the battery consumption of the wireless terminal. It is effective when a wireless LAN is used by a battery-powered terminal such as a PDA (Personal Digital Assistant) or a notebook personal computer (PC). In particular, since battery-powered driving is generally considered in wireless digital cameras, battery saving using the power-saving mode is indispensable for IBSS (ad-hoc network) communication in the IEEE 802.11x-compliant wireless LAN described above. It is considered a function.

  Here, data communication during power saving in IBSS (ad hoc network) will be described with reference to FIGS. FIG. 4 is a diagram showing a timing chart in the conventional IBSS communication.

  FIG. 5 is a diagram illustrating a frame structure of an ATIM (Announcement Traffic Indication Message). The frame shown in FIG. 5 is a case where the MAC frame type defined in the MAC (Medium Access Control) layer is management and the subtype is ATIM, and since no information element exists in ATIM, the frame body is not used. Frame control (Control) 500, Duration / ID 501, Destination address (DA) 502, Source address (SA) 503, FCS (Frame Check Sequence) 504.

  In the above-described IBSS, there is a terminal (here, referred to as a printer 301) that determines a beacon interval 401 called an IBSS creator, and synchronization for transmitting and receiving data between a plurality of terminals 301, 302, and 303 is established. Yes. The start of the beacon interval 401, that is, a certain period starting from the beacon transmission timing is referred to as an ATIM window 402. In this IBSS, in order to transmit a data frame to a terminal in the PS mode, ATIM is used to notify the transmission of the data frame in advance.

  ATIM is transmitted during a special period called ATIM Window. In addition, during the ATIM Window, only beacons or ATIM are allowed to be transmitted, and it is specified that a terminal in the PS mode is in an Awake state.

  This ATIM is transmitted using collision avoidance means. In the example shown in FIG. 4, print data is transmitted from the terminal 302 to the printer 301, the ATIM destination address 502 is set to the same address as the corresponding data frame, and ATIM transmission 403 is performed. In the case of unicast communication, the printer 301 that has received the ATIM 404 performs ACK transmission 405, and the terminal 302 that has transmitted ATIM performs ACK reception 406. Then, the printer 301 that has received the ATIM maintains the Awake state until a data frame is received.

  Further, the terminal 303 that has not received the ATIM in the ATIM Window transitions to the power save state 411 simultaneously with the end of the ATIM Window. After the end of the ATIM Window, only the data frame transmission 407 for which the transmission is notified by the ATIM is permitted for the terminal in the PS mode. The printer 301 that received the data frame 408 performs ACK transmission 409, and the terminal 302 that transmitted the data frame performs ACK reception 410.

In this way, not only PDAs and notebook PCs, but also digital cameras and inkjet printers have built-in wireless functions, they have been connected with cables and output image data directly from the digital camera to the printer. There is a new user need to directly print wirelessly between a wireless digital camera and a wireless printer on an ad hoc network that does not use a wireless access point using a wireless function.
JP 2004-122586 A

  However, direct printing between a plurality of wireless digital cameras using a wireless printer is different from the conventional wired connection method in which a printer and a digital camera are directly connected in a one-to-one manner. When a request is generated, there is a problem that the printer cannot respond to a plurality of print requests.

  An object of the present invention is to permit data transmission to one wireless terminal device when a data transmission request is generated from a plurality of wireless terminal devices connected via a wireless network to a wireless compatible output device. To do.

  When transmitting data to another wireless terminal device, the wireless terminal device of the present invention inquires that it wants to occupy a connection with the other wireless terminal device, and from the other wireless terminal device Control means for controlling to continuously transmit data until the transmission of the data is completed when it is received that the connection can be occupied.

  In addition, the wireless terminal device of the present invention makes an inquiry to occupy a connection between a transmitting unit that transmits a beacon signal for establishing synchronization every predetermined time and the wireless terminal device from another wireless terminal device A determination unit that determines whether or not the connection can be occupied according to the reception unit, a reception unit that receives data from the other wireless terminal device according to a result determined by the determination unit, and a reception by the reception unit Stop means for stopping the transmission of the beacon signal by the transmission means until the end of the transmission.

  Furthermore, the present invention provides a wireless communication system in which a plurality of wireless terminal devices and a wireless compatible output device are connected via a wireless network, wherein the wireless terminal device transmits data to the wireless compatible output device. When receiving the means for occupying the connection with the wireless compatible output device and the fact that the connection can be occupied from the wireless compatible output device, until the transmission of the data is completed. Control means for controlling data transmission continuously, and the wireless compatible output device responds to an inquiry from the wireless terminal device to occupy a connection with the wireless compatible output device. A determination unit that determines whether or not the connection can be occupied, and if the connection is occupying as a result of the determination by the determination unit, the connection can be occupied to the wireless terminal device. If the connection is occupying and the notification means for notifying that the data is continuously received until the data transmission from the wireless terminal device is completed, and the connection from the other wireless terminal device is to be occupied. And control means for controlling so as not to accept inquiries.

  According to the present invention, even when there are a plurality of wireless terminal devices, data transmission can be permitted to one wireless terminal device, and communication control between the plurality of wireless terminal devices can be performed simply. Can do.

  The best mode for carrying out the invention will be described below in detail with reference to the drawings. In the embodiment, the wireless terminal will be described using an IEEE 802.11x-compliant wireless LAN compatible digital camera such as IEEE 802.11b / a / g as an example, and the wireless compatible output device will be described using a printer as an example. However, the present invention is not limited thereto, and a wireless LAN compatible camera-equipped notebook computer or mobile phone, and a wireless compatible output device may be a wireless LAN compatible copying machine or fax machine.

[First Embodiment]
As a first embodiment, a wireless-compatible digital camera in power saving mode (PS mode) in IBSS (ad hoc network) uses ATIM to notify the wireless-compatible printer in advance of data transmission from the digital camera to the printer. A data transmission method when data is continuously transmitted will be described.

  FIG. 6 is a diagram illustrating an example of a configuration of the wireless communication system according to the first embodiment. In FIG. 6, reference numeral 601 denotes a wireless printer having a wireless function (hereinafter simply referred to as a printer), which determines a beacon interval as an IBSS creator. Reference numerals 602 and 603 denote wireless digital cameras (hereinafter simply referred to as digital cameras) having a wireless function, which are wirelessly connected to the printer 601 and have a function of directly sending the captured image data to the printer 601 and performing direct printing. .

  Note that the hardware configurations of the printer and digital camera may be general, and a description thereof is omitted here.

  FIG. 7 is a timing chart of IBSS communication in the first embodiment. FIG. 8 is a flowchart showing processing of the digital camera in the first embodiment, and FIG. 9 is a flowchart showing processing of the printer in the first embodiment. The processes shown in FIGS. 8 and 9 are processes performed by a wireless communication control unit that controls wireless communication in a digital camera and a printer and a control unit that includes a CPU, ROM, RAM, and the like that control the entire process. It is assumed that the program is stored in a recording medium such as a (flash ROM) or a hard disk.

  In the ad hoc network in which the printer 601 shown in FIG. 6 is configured as an IBSS creator, the digital camera 602 automatically detects the presence of the group identifier (SSID = ABC123), and lists the printer 601 as a connectable wireless terminal. Thereafter, when the printer 601 is set by a user's selection operation using the digital camera 602 and a print request is issued to the printer 601, the digital camera 602 starts the processing illustrated in FIG.

  First, the digital camera 602 determines in advance whether or not it is in an ATIM Window period in which an ATIM for notifying transmission of a data frame can be transmitted, and if it is in an ATIM Window period (YES in step S801), the printer 601. Whether or not there is transmission data. If transmission data exists (YES in step S802), a setting value (for example, a maximum value (65 ms) such as FFFF) indicating that the band is occupied is set in the duration / ID information 501 in the ATIM frame. After starting the transmission timer, ATIM frame transmission 701 is performed to the printer 601 (step S803).

  Next, it is checked whether or not the transmission timer has expired. If the transmission timer has not expired (NO in step S804), the printer 601 waits for an ACK reception 704 that is a response to the ATIM frame transmission 701 (step S805). ), And repeats steps S804 to S805 for a predetermined period defined by the transmission timer.

  Here, if the digital camera 602 cannot confirm the reception confirmation ACK reception 704 for the ATIM frame transmission 701 (NO in step S805), and the above-described transmission timer expires (YES in step S804), the above-described ATIM Window confirmation state The process proceeds to (Step S801).

  On the other hand, in the printer 601, the processing shown in FIG. 9 is started, and if it is during the ATIM Window period (YES in step S901), as in the digital camera 602, the Awake state is set, a beacon signal is transmitted, and the ATIM Window timer is set. Start (step S902). Thereafter, before the ATIM Window timer expires (NO in step S903), the process transits to a waiting state (step S904) in which it is confirmed whether or not an ATIM is received from the digital camera 602. Then, Steps S903 to S904 are repeatedly performed for a predetermined period specified by the ATIM Window timer.

  When the above-described ATIM Window timer has expired (YES in step S903), the printer 601 enters the PS mode (step S905), and transitions to the above-described determination processing state (step S901) as to whether or not it is in the ATIM window period.

  If the printer 601 confirms the reception of the ATIM frame 702 from the digital camera 602 (YES in step S904) before the above-described ATIM Window timer expires (NO in step S903), the printer 601 determines whether printing is possible and does not print. If it is possible (NO in step S906), the process proceeds to the above-described determination processing state (step S901) as to whether or not it is during the ATIM Window period.

  If printing is possible (YES in step S906), an ACK transmission 703 for confirming ATIM frame reception 702 is performed to the digital camera 602 after starting the data reception timer (step S907). Here, before the data reception timer expires (NO in step S908), the digital camera 602 transitions to a waiting state for printing data reception 706 (step S909), and for a predetermined period specified by the data reception timer, steps S908 to S908. Step S909 is repeatedly performed.

  Here, when the printer 601 cannot confirm the data reception 706 from the digital camera 602 and the above-described data reception timer has expired (YES in step S908), the state transitions to the above-described ATIM Window confirmation state (step S901).

  On the other hand, in the digital camera 602, when the ACK reception 704 is received in the waiting state of the ACK reception 704 (step S805) for confirming the reception of the ATIM frame transmission 701 (YES in step S805), after starting the data transmission timer, the printer A print data transmission 705 is performed for 601 (step S806).

  At this time, if the transmission of the print data is incomplete, that is, if there is data to be continuously transmitted (NO in step S807), the data transmission timer expiration confirmation process (step S804) to the print data transmission confirmation process (Step S807) is repeatedly performed.

  If the ACK reception 708, which is the reception confirmation of the print data transmission 705, is received from the printer 601 (NO in step S805) before the data transmission timer expires (NO in step S804), after the data transmission timer is started, Print data transmission 705 is performed to the printer 601 (step S806).

  When the transmission of the print data is completed (YES in step S807), the state transits to the above-described ATIM Window confirmation state (step S801).

  On the other hand, when the printer 601 confirms the print data reception 706 from the digital camera 602 while waiting for the print data reception 706 (step S909) (YES in step S909), the printer 601 transfers the received data to the printer processing unit (step S910). ). Then, after starting the data reception timer, ACK transmission 707 is performed to the digital camera 602 (step S907).

  Next, if the print data reception 706 is confirmed (NO in step S909) before the data reception timer expires (NO in step S908), the received data is transferred to the printer processing unit (step S910).

  As described above, while confirming the print data reception 706 from the digital camera 602, the printer 101 repeatedly executes steps S <b> 907 to S <b> 910 to establish a continuous transmission period 709 with the digital camera 602.

  When the above-described data reception timer expires (YES in step S908), the state transits to the ATIM Window confirmation state (step S901). Then, the printer 601 determines a beacon interval 401 as an IBSS creator, and performs beacon transmission 710 to notify a plurality of digital cameras that print data can be received.

  According to the first embodiment, by configuring one-to-one data communication between a PS mode wireless printer and a plurality of wireless digital cameras in an IBSS (ad hoc network), a plurality of wireless digital cameras in the wireless printer. It is no longer necessary to process print requests from the printer, and software control is simplified. Further, it is not necessary to provide a buffer for each digital camera in the wireless printer, so that the hardware configuration can be optimized and the cost can be reduced.

[Second Embodiment]
Next, a second embodiment according to the present invention will be described in detail with reference to the drawings. Note that the configuration of the wireless communication system in the second embodiment is the same as that of FIG. 6 used in the first embodiment.

  As the second embodiment, when data communication is performed between the printer 601 and the digital camera 602 described in the first embodiment with reference to FIGS. 5, 6, 10, and 11, Processing when the digital camera 603 performs data communication will be described.

  FIG. 10 is a timing chart of IBSS communication in the second embodiment. FIG. 11 is a flowchart showing the processing of the digital camera 603 in the second embodiment.

  11 will be described as processing of the digital camera 603, the digital camera 602 described in the first embodiment can also perform the processing of FIG.

  In an ad hoc network in which the wireless printer 601 is configured as an IBSS creator, if the wireless digital camera 603 detects an ATIM frame (YES in step S1101) during the ATIM Window period (YES in step S1102), the duration in the ATIM frame The / ID information 501 is confirmed (step S1103). Here, when data indicating that the band is occupied (for example, FFFF) is set in the duration / ID information 501 (YES in step S1104), the mode transits to the intermittent reception mode 1001, for example, on the liquid crystal display unit. A message 1002 such as “Cannot print. Please wait for a while” is output (step S1105).

  Thereafter, the wireless digital camera 603 continues the message output state (step S1105) described above (steps S1105 to S1106) until a beacon signal transmitted by the wireless printer 601 is detected (YES in step S1106).

  Next, in the message output state (step S1105), the wireless digital camera 603 completes data communication from the digital camera 602 to the printer 601 and detects a beacon signal transmitted by the wireless printer 601 (YES in step S1106). Then, the display message 1002 on the liquid crystal display unit is cleared (step S1107), and the transition from the intermittent reception mode 1001 to the normal state ATIM Window confirmation state (step S1101) is made.

  Further, when data indicating that the band is occupied (for example, FFFF) is not set in the duration / ID information 501 (NO in step S1104), the state transitions to the ATIM Window confirmation state (step S1101).

  In the above description, when an ATIM frame in which data indicating that the bandwidth is occupied (for example, FFFF) is received in the duration / ID information 501, the display in step S1105 is performed. This may be performed only when the user of the wireless digital camera 603 performs a printing operation. When the above display is performed even if the printing operation is not performed, it is possible to confirm whether the printing is possible or not by checking the display. Therefore, it is possible to prevent a wasteful printing operation, and only when the printing operation is performed. When displaying, it is possible to prevent useless display processing of continuously displaying whether or not printing is possible even though the user does not intend to print, and wasteful power consumption can be prevented.

  In addition, the user may arbitrarily set these display controls according to the use environment of the digital camera.

[Other Embodiments]
In the first embodiment, the digital camera 602 receives the beacon signal of the printer 601, detects the presence of the group identifier (SSID = ABC123), and lists up as a connectable printer. Thereafter, the digital camera 602 transmits print data to the printer 601 by the user's selection operation using the digital camera 602. However, when the print data is transmitted to the printer 601, the digital camera 602 performs digital processing without the user's selection operation. The present invention is similarly realized even when the application of the camera 602 is configured to automatically select an appropriate application from a plurality of listed printers and transmit print data.

  In the second embodiment, when the digital camera 603 has set data (for example, FFFF) indicating that the band is occupied in the duration / ID information 501 (YES in step S1104), the liquid crystal display unit The message 1002 such as “Cannot print. Please wait for a while.” Is output (step S1105). The

  In the embodiment, the control method for transmitting data to a printer having a wireless LAN function by a plurality of wireless digital cameras has been described using a wireless LAN as an example. However, the present invention is not limited to this, and the wireless method is not limited thereto. Any system can be applied to any system regardless of analog / digital of a signal to be handled as long as the terminal is configured to be connected to a network using a group identifier to determine a wireless terminal to be connected. is there. In addition, the present invention can be variously modified and implemented without departing from the scope of the invention.

  As described above, according to the present embodiment, print data transmission / reception between the digital camera and the printer is performed by including the print time that occupies and uses the bandwidth in the duration information of ATIM, which is the standard specification of IEEE 802.11. It is possible to configure the route on a one-to-one basis. As a result, in response to a print request from a plurality of terminals to the printer, buffering (printer spooler function or the like) processing for each terminal in the printer becomes unnecessary, and the print control in the printer is simplified. In addition, the hardware configuration can be optimized and the cost of the printer can be reduced.

  In the digital camera that is waiting for printing, the band occupation time of the printer other than itself becomes clear, so unnecessary print request processing is avoided and further battery saving is possible.

  In addition, with respect to a digital camera that does not support the function according to the present invention (including or detects the printing time that occupies and uses the bandwidth in the ATIM duration information), the beacon information is stopped so that Since connection requests are suppressed, unnecessary connection processing is avoided, and smooth printing processing can be realized.

  Even if the present invention is applied to a system composed of a plurality of devices (for example, a host computer, an interface device, a reader, a printer, etc.), it is applied to an apparatus (for example, a copier, a facsimile machine, etc.) composed of a single device. It may be applied.

  Another object of the present invention is to supply a recording medium in which a program code of software realizing the functions of the above-described embodiments is recorded to a system or apparatus, and the computer (CPU or MPU) of the system or apparatus stores it in the recording medium. Needless to say, this can also be achieved by reading and executing the programmed program code.

  In this case, the program code itself read from the recording medium realizes the functions of the above-described embodiment, and the recording medium storing the program code constitutes the present invention.

  As a recording medium for supplying the program code, for example, a floppy (registered trademark) disk, a hard disk, an optical disk, a magneto-optical disk, a CD-ROM, a CD-R, a magnetic tape, a nonvolatile memory card, a ROM, or the like is used. be able to.

  Further, by executing the program code read by the computer, not only the functions of the above-described embodiments are realized, but also an OS (operating system) operating on the computer based on the instruction of the program code. It goes without saying that a case where the function of the above-described embodiment is realized by performing part or all of the actual processing and the processing is included.

  Further, after the program code read from the recording 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, the function expansion is performed based on the instruction of the program code. It goes without saying that the CPU or the like provided in the board or the function expansion unit performs part or all of the actual processing and the functions of the above-described embodiments are realized by the processing.

It is a figure which shows the connection form of the digital camera and printer by a wire communication. It is a figure which shows the connection form of wireless LAN in infrastructure mode. It is a figure which shows the connection form of wireless LAN in ad hoc mode. It is a figure which shows the timing chart in the conventional IBSS communication. It is a figure which shows the frame structure of ATIM (Announcement Traffic Indeication Message). It is a figure which shows an example of a structure of the radio | wireless communications system in 1st Embodiment. It is a figure which shows the timing chart of the IBSS communication in 1st Embodiment. 4 is a flowchart illustrating processing of the digital camera 602 in the first embodiment. 6 is a flowchart illustrating processing of the printer 601 according to the first embodiment. It is a figure which shows the timing chart of the IBSS communication in 2nd Embodiment. It is a flowchart which shows the process of the digital camera 603 in 2nd Embodiment.

Claims (16)

Means for inquiring to occupy a connection with the other wireless terminal device when transmitting data to the other wireless terminal device;
Control means for controlling to continuously transmit data until the transmission of the data is completed when the fact that the connection can be occupied is received from the other wireless terminal device Terminal device.   The said inquiry is performed using the ATIM (Announcement Traffic Indication Message) frame for notifying the transmission of a data frame beforehand prescribed | regulated by the wireless LAN based on IEEE802.11. Wireless terminal device.   The wireless terminal apparatus according to claim 2, wherein the ATIM frame is transmitted during a predetermined period from a beacon signal for establishing synchronization with a plurality of wireless terminal apparatuses.   2. The wireless terminal device according to claim 1, wherein the control unit controls the display unit to display a message to the effect that the other wireless terminal device cannot be occupied.   When the control means detects a beacon signal for establishing synchronization between a plurality of wireless terminal devices from the other wireless terminal device while displaying that the connection is not occupying, the control unit can occupy the connection. 5. The wireless terminal device according to claim 4, wherein control is performed so as to display a message on the display means.   The control means is based on information set in an ATIM (Announcement Traffic Indication Message) frame for notifying transmission of a data frame in advance, which is prescribed by a wireless LAN compliant with IEEE802.11. The wireless terminal device according to claim 4, wherein it is determined whether or not the terminal device can be occupied. Transmitting means for transmitting a beacon signal for establishing synchronization every predetermined time;
A determination unit that determines whether or not the connection can be occupied in response to an inquiry from another wireless terminal device that the connection with the wireless terminal device is to be occupied;
A receiving means for receiving data from the other wireless terminal device according to a result of the determination by the determining means;
A wireless terminal apparatus comprising: a stopping unit that stops transmission of the beacon signal by the transmitting unit until reception by the receiving unit is completed.   8. The inquiry according to claim 7, wherein the inquiry is performed using an ATIM (Announcement Traffic Indication Message) frame, which is specified in a wireless LAN compliant with IEEE802.11, for an advance notice of data frame transmission. Wireless terminal device.   The wireless terminal device according to claim 7, wherein the determination unit determines that the connection can be occupied when printing is possible in a printing unit.   The wireless terminal device functions as a creator of an ad hoc network, and accepts an inquiry to occupy the connection from a wireless terminal device other than the other wireless terminal device by stopping transmission of a beacon signal by the stopping unit. The wireless terminal device according to claim 7, wherein the wireless terminal device is controlled so as not to exist. A wireless communication system in which a plurality of wireless terminal devices and wireless output devices are connected via a wireless network,
The wireless terminal device
Means for inquiring to occupy a connection with the wireless compatible output device when transmitting data to the wireless compatible output device;
A control means for controlling to continuously transmit data until the transmission of the data is completed when the fact that the connection is occupying is received from the wireless compatible output device;
The wireless compatible output device is:
A determination unit that determines whether or not the connection can be occupied in response to an inquiry from the wireless terminal device that the connection with the wireless compatible output device is to be occupied;
As a result of the determination by the determination unit, when the connection can be occupied, a notification unit that notifies the wireless terminal device that the connection can be occupied;
When the connection is occupying, control is performed so that data is continuously received until data transmission from the wireless terminal device is completed, and an inquiry from another wireless terminal device to occupy the connection is not accepted. A wireless communication system. A step of inquiring that a connection with the other wireless terminal device is to be occupied when transmitting data to the other wireless terminal device;
And a control step of performing control so that data transmission is continuously performed until the transmission of the data is completed when the fact that the connection can be occupied is received from the other wireless terminal device. A control method of a terminal device. A transmission step of transmitting a beacon signal for establishing synchronization every predetermined time;
A determination step of determining whether or not the connection can be occupied in response to an inquiry from another wireless terminal device to occupy a connection with the wireless terminal device;
In accordance with the determination result in the determination step, a reception step of receiving data from the other wireless terminal device;
A control method for a wireless terminal device, comprising: a stop step of stopping transmission of the beacon signal even after the predetermined time has elapsed until reception in the reception step is completed.   The program for making a computer perform each procedure of the control method of the radio | wireless terminal apparatus of Claim 12.   A non-transitory computer-readable storage medium storing a program for causing a computer to execute each procedure of the wireless terminal device control method according to claim 13.   A computer-readable recording medium on which the program according to claim 14 or 15 is recorded.

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