JP2010109608A - Radio communication terminal and radio communication system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a radio communication terminal and a radio communication system capable of starting line connection processing from a desired radio communication terminal side in procedures for establishing one-to-one radio communication lines. <P>SOLUTION: A communication control section 15 in an electronic camera apparatus 10 includes a host mode for transmitting connection requests of data link layer protocols to a terminal at the side of one's party and a target mode transmitting no connection requests, and is operated by one of the host and target communication modes. A terminal determination section 17e1 determines whether an external terminal, which is under operation in the same communication mode as the communication mode operated by the communication control section 15, exists. When the terminal determination section 17e1 determines that the external terminal exists, a mode change request section 17e2 requests a change in the communication mode from the external terminal. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a wireless communication terminal and a wireless communication system.

As a configuration of a communication line of wireless communication terminals, wireless communication terminals may perform one-to-one communication without using a relay device. In a line configuration composed of wireless communication terminals, as a communication procedure for connecting the lines, the role of which wireless communication terminal starts processing needs to be determined in each wireless communication terminal. In that role, the side that starts processing in the communication connection procedure may be defined as a host, and the side that receives a communication connection request from the host may be defined as a target.
In addition, in the wireless communication terminal, there is a technology for determining the role of the communication procedure in each wireless communication terminal when setting parameters related to the wireless communication connection (see, for example, Patent Document 1).
JP 2007-251922 A

  However, Patent Document 1 has a problem in that when a parameter relating to wireless connection is not set or when parameter setting is not necessary, the procedure for determining the role cannot be performed and the role cannot be set. That is, there is a problem that communication may not be started because the role (host or target) cannot be assigned even if the line connection process is started from the desired wireless communication terminal side.

  The present invention has been made to solve the above problems, and its object is to assign a desired role (host or target) to each wireless communication terminal in the process of connecting a one-to-one wireless communication line. To provide a wireless communication terminal and a wireless communication system.

  In order to solve the above problem, the present invention provides a first communication mode in which a connection request of a data link layer protocol in wireless communication is transmitted to a counterpart terminal that performs wireless communication and a second communication in which the connection request is not transmitted. And a wireless communication terminal that performs one-to-one wireless communication without going through a terminal that relays the wireless communication, and an external terminal that operates in any one of the first communication mode and the second communication mode. A communication control unit having the first communication mode and the second communication mode and operating in any one of the first communication mode and the second communication mode; and the communication control unit When it is determined that the external terminal is present by the terminal determination unit that determines whether or not the external terminal is operating in the same communication mode as the communication mode being operated, The outer end It is a wireless communication terminal, comprising a mode change request unit for requesting the change of the communication mode, the relative.

Further, the present invention is the above invention, wherein, when the communication mode operated by the communication control unit is the first communication mode, the terminal determination unit connects the connection request from the external terminal to which the connection request is transmitted. When a response to the request is not received within a predetermined period, or when the connection request is received from the external terminal, it is determined that the external terminal exists.
Also, in the present invention according to the above invention, the communication control unit determines that the external terminal exists by the terminal determination unit when the communication mode operated by the communication control unit is the first communication mode. In this case, the communication mode is operated in the second communication mode, and when it is determined that the mode is present, the mode change request unit changes the communication mode in response to the connection request from the external terminal. Is required.

Further, according to the present invention, in the above invention, the mode change request unit responds with a connection rejection response to the connection request and requests to change the communication mode.
Also, in the present invention according to the above invention, the terminal determination unit is configured to perform the connection request from the external terminal within a predetermined time when the communication mode operated by the communication control unit is the second communication mode. If not received, it is determined that the external terminal exists.
Also, in the present invention according to the above invention, the communication control unit determines that the external terminal exists by the terminal determination unit when the communication mode operated by the communication control unit is the second communication mode. In this case, the communication mode is operated in the first communication mode, and when it is determined that the external terminal exists, the mode change request unit requests the external terminal to change the communication mode. I decided to.
Further, according to the present invention, in the above invention, the mode change request unit transmits the connection request to the external terminal and requests to change the communication mode.

  In addition, the present invention is a wireless communication system that performs one-to-one wireless communication without using a terminal that relays the first communication terminal and the second communication terminal facing each other. A first communication mode for transmitting a connection request for a data link layer protocol in the wireless communication and a second communication mode for not transmitting the connection request, and one of the first communication mode and the second communication mode A terminal determination for determining whether or not there is a first communication control unit operating in a communication mode and the second communication terminal operating in the same communication mode as the communication mode operating in the first communication control unit And a mode change request unit that requests the second communication terminal to change the communication mode when the terminal determination unit determines that the second communication terminal exists, and a first communication terminal comprising: The first communication mode Having the second communication mode, operating in one of the first communication mode and the second communication mode, and operating in response to a request to change the communication mode from the first communication terminal And a second communication terminal that includes a second communication control unit that changes the communication mode.

  The present invention also includes a first communication mode for transmitting a data link layer protocol connection request in the wireless communication to a counterpart terminal that performs wireless communication, and a second communication mode in which the connection request is not transmitted. A wireless communication terminal that performs one-to-one wireless communication without going through a terminal that relays the wireless communication with an external terminal that operates in any one of the first communication mode and the second communication mode, When there is a request for changing the communication mode from the external terminal while operating in one of the first communication mode and the second communication mode. Includes a communication control unit that changes the operating communication mode in response to the request.

  According to the present invention, a desired role (host or target) can be assigned to each wireless communication terminal in a process of connecting a one-to-one wireless communication line.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
(First embodiment)
FIG. 1 is a block diagram showing a configuration of a communication system in the first embodiment.
The wireless communication system shown in the figure has a configuration for performing one-to-one communication with the electronic camera device 10 and the printer device 20 facing each other as a wireless communication terminal. In this wireless communication system 1, an operation performed by a user 30 is detected by the electronic camera device 10 or the printer device 20 which is a wireless communication terminal, communication is started, and image data stored in the electronic camera device 10 is transferred to the printer. Transmit to device 20.

FIG. 2 is a block diagram showing the configuration of the wireless communication terminal in the first embodiment.
The wireless communication terminal shown in the figure is an electronic camera device 10 having a wireless communication function.
The electronic camera device 10 includes an imaging unit 11, a recording medium 12, an operation unit 13, a display unit 14, a communication control unit 15, a storage unit 16, and a control unit 17. The same components as those shown in FIG.
The imaging unit 11 in the electronic camera device 10 shoots a subject to generate an imaging signal, and performs various image processing to create image data. The created image data is recorded on the recording medium 12. As the recording medium 12, a memory card that is detachable from the electronic camera device 10, a hard disk device fixed to the electronic camera device 10, or the like is used. The operation unit 13 includes an operation switch for inputting an instruction related to the operation of the electronic camera device 10 and detects an operation input performed by the user 30. The display unit 14 displays image data read from the recording medium 12 or a user interface screen.

The communication control unit 15 is a wireless communication interface that exchanges data such as captured images with the printer device 20 and other external devices such as a personal computer and an external recording device. The wireless communication interface applied to the communication control unit 15 includes an interface for performing wireless communication such as WLAN (Wireless Local Area Network), Bluetooth, IrDA (Infrared DATA), TransferJET, WiMedia, and the like.
The communication control unit 15 has a function of performing communication processing of the data link layer protocol. The communication control unit 15 includes a host mode processing unit 15h that transmits a connection request message for starting communication, and a target mode processing unit 15t that does not transmit a connection request message for starting communication.
The host mode processing unit 15h can start a communication line connection process by sending a connection request message to the opposing printer 20 in response to a request from a higher-level communication process. In response to the transmitted connection request message, the host mode processing unit 15h receives a connection permission message returned from the opposing printer device 20, and establishes a communication line connection. In response to the transmitted connection request message, the host mode processing unit 15h interrupts the communication line connection processing when receiving a connection rejection message returned from the opposing printer device 20. Furthermore, even if the host mode processing unit 15h receives a connection request message sent from the opposing printer device 20, it does not send a response message. The host mode processing unit 15h notifies the higher-level communication processing of the determination result based on the received message.
The target mode processing unit 15t receives a connection request message sent from the opposing printer device 20, and returns a connection permission message when it is determined that a connection is necessary.

The storage unit 16 includes a RAM 16r, a flash memory 16f, and the like.
In addition to the control program, the flash memory 16f records shooting parameters, communication parameters (data communication protocol information, etc.), operation states of each unit, and the like.
The control unit 17 includes a logic processing unit (not shown) such as a CPU (Central Processing Unit), reads a control program recorded in the flash memory 16f, executes the control program by the logic processing unit, and stores the control program in the RAM. By reading and writing various data, the operation of each part of the electronic camera device 10 is comprehensively controlled.

The control unit 17 includes an imaging unit control processing unit 17a, a recording medium control unit 17b, an operation unit control processing unit 17c, a display control processing unit 17d, and a communication control processing unit 17e.
The imaging unit control processing unit 17a refers to imaging parameters stored in the storage unit 16, sends control signals to the imaging unit 11, refers to image data generated at the time of imaging, and is a storage area allocated to the storage unit 16 To record. The recording medium control unit 17 b refers to the image data stored in the storage unit 16 and records it on the recording medium 12. Further, the image data recorded on the recording medium 12 is referred to and recorded in a storage area allocated to the storage unit 16. The operation unit control processing unit 17 c notifies control information to each unit based on the operation input detected by the operation unit 13. The display control processing unit 17d refers to the image data stored in the storage unit 16 and causes the display unit 14 to display the image data. The display control processing unit 17 d generates a user interface screen required for the operation of the operation unit 13 and causes the display unit 14 to display the user interface screen.

The communication control processing unit 17e refers to the communication parameters (data communication protocol information and the like) stored in the storage unit 16 and controls the communication control unit 15 as well as the upper level of communication communicated via the communication control unit 15. The processing procedure is processed.
The communication control processing unit 17e includes a terminal determination processing unit 17e1 and a mode change request processing unit 17e2 related to the control of the communication control unit 15.
The terminal determination processing unit 17e1 manages the setting of the communication mode operated in the communication control unit 15, and based on the result received by the communication control unit 15, determines the communication mode operating in the opposing printer device 20. I do.
After transmitting a connection request message from the host mode processing unit 15h, the terminal determination processing unit 17e1 receives a response message (connection permission response or connection rejection response) from the printer device 20 within a predetermined period. If the host mode processing unit 15h is not notified of this, or if the host mode processing unit 15h is notified that the connection request message has been received from the printer device 20, the communication operating by the printer device 20 is performed. It is determined that the mode is the same host mode.

  The mode change request processing unit 17e2 controls the switching of the role of the communication mode operated in the communication control unit 15, sends an instruction to switch the host mode processing unit 15h and the target mode processing unit 15t to the communication control unit 15, Either one is operated. The mode change request processing unit 17e2 instructs the communication control unit 15 to send out a request to switch the role on the printer device 20 side according to the role of the communication mode in the communication control unit 15.

FIG. 3 is a block diagram illustrating a configuration of the wireless communication terminal according to the first embodiment.
The wireless communication terminal shown in the figure is a printer device 20 having a wireless communication function.
The printer device 20 includes a printing unit 21, an operation unit 22, a communication control unit 23, a storage unit 24, and a control unit 25. The same components as those shown in FIG.
The printing unit 21 in the printer device 20 is received by the communication control unit 23 and prints the print data on a printing paper (not shown). The operation unit 22 includes an operation switch for inputting an instruction regarding the operation of the printer device 20.

  The communication control unit 23 is a wireless communication interface that exchanges data such as captured images with the electronic camera device 10 and other external devices such as a personal computer and an external recording device. As a wireless communication interface applied to the communication control unit 23, there is an interface for performing wireless communication such as WLAN (Wireless Local Area Network), Bluetooth, IrDA (Infrared DATA), TransferJET, WiMedia.

The communication control unit 23 has a function of performing communication processing of the data link layer protocol. The communication control unit 23 includes a host mode processing unit 23h that transmits a connection request message for starting communication, and a target mode processing unit 23t that does not transmit a connection request message for starting communication.
The host mode processing unit 23h can start a communication line connection by sending a connection request message to the opposing electronic camera device 10 in response to a request from a higher-level communication process. In response to the transmitted connection request message, the host mode processing unit 23h receives a connection permission message returned from the opposing electronic camera device 10 and establishes a communication line connection. In response to the transmitted connection request message, the host mode processing unit 23h interrupts the communication line connection processing when receiving a connection rejection message returned from the opposing electronic camera device 10. Furthermore, even if the host mode processing unit 23h receives a connection request message sent from the opposing electronic camera device 10, it does not send a response message. The host mode processing unit 23h notifies the higher-level communication process of the determination result based on the received message.
The target mode processing unit 23t receives a connection request message sent from the opposing electronic camera device 10, and returns a connection permission message when it is determined that a connection is necessary.

The storage unit 24 includes a RAM 24r, a flash memory 24f, and the like.
In addition to the control program, the flash memory 24f stores printing parameters, communication setting parameters (data communication protocol information, etc.), operation states of each unit, and the like.
The control unit 25 reads and executes a control program recorded in the flash memory 24f, and reads and writes various data to and from the RAM 24r, thereby comprehensively controlling the operation of each unit of the printer device 20.

The control unit 25 includes a print control processing unit 25a, an operation unit control processing unit 25b, and a communication control processing unit 25c.
The printing unit control processing unit 25 a refers to the printing parameters stored in the storage unit 24 and sends a control signal to the printing unit 21. The printing unit control processing unit 25 a receives the image data via the communication control unit 23, inputs the image data recorded in the storage area allocated to the storage unit 24 to the printing unit 21, and causes the printing unit 21 to print the image data.
The operation unit control processing unit 25b notifies the control information to each unit based on the operation input detected by the operation unit 22.

The communication control processing unit 25c refers to the communication parameters (data communication protocol information and the like) stored in the storage unit 24, controls the communication control unit 23, and performs higher-level communication performed via the communication control unit 23. The processing procedure is processed.
The communication control processing unit 25c includes a terminal determination processing unit 25c1 and a mode change request processing unit 25c2 related to the control of the communication control unit 23.
The terminal determination processing unit 25 c 1 manages the setting of the communication mode operated in the communication control unit 23 and records it in the storage unit 24. In addition, the terminal determination processing unit 25c1 determines the communication mode in which the electronic camera device 10 that is facing is operating based on the result received by the communication control unit 23.

After sending the connection request message from the host mode processing unit 23h, the terminal determination processing unit 25c1 sends a response message (connection permission response or connection rejection response) to the connection request from the electronic camera device 10 within a predetermined period. When not received from the host mode processing unit 23h, or when notified from the host mode processing unit 23h that the connection request message from the electronic camera device 10 has been received, the electronic camera device 10 operates. Are determined to be the same host mode.
The mode change request processing unit 25c2 controls the role switching of the communication mode operated in the communication control unit 23, instructs the communication control unit 23 to switch between the host mode processing unit 23h and the target mode processing unit 23t, Either one is operated. The mode change request processing unit 25e2 instructs the communication control unit 23 to send out a request to switch the role on the electronic camera device 10 side according to the role of the communication mode in the communication control unit 23.

FIG. 4 is a diagram illustrating the role of the connection procedure of the wireless communication terminal in the first embodiment.
FIG. 4A shows a configuration adapted to an application in which the user 31 operates the electronic camera device 10h and makes a print request to the printer device 20t using the wireless communication system 1. In the configuration shown in the figure, since the line connection request is transmitted from the device operated by the user 31, the role of the data link layer protocol is the electronic camera device 10h as the host and the printer device 20t as the target.
FIG. 4B shows a configuration adapted to an application in which the user 32 operates the printer device 20h to print an image in the electronic camera device 10t using the wireless communication system 1. In the configuration shown in the figure, since the line connection request is transmitted from the device operated by the user 32, the role in the data link layer protocol is the electronic camera device 10t as the target and the printer device 20h as the host.
Each of the electronic camera device 10h and the printer device 20t, and each of the electronic camera device 10t and the printer device 20h has both a host function (host mode) and a target function (target mode). That is, a state in which the roles of the host function (host mode) and the target function (target mode) are switched to be applied to each application using the electronic camera device 10 and the printer device 20 is shown.
The configuration shown in the figure shows a configuration in which communication can be performed in opposition to each other.

FIG. 5 is a sequence diagram showing a connection procedure of the wireless communication terminal in the first embodiment.
As shown in this figure, a connection request message is transmitted from the wireless communication terminal set to the host function (host mode), and the wireless communication terminal set to the target function (target mode) receives the message. The wireless communication terminal set to the target function (target mode) transmits a connection permission message in response to the received connection request message. The wireless communication terminal set to the host function (host mode) that has received the connection permission message detects that the line has been connected. As described above, the host function in the present embodiment indicates a communication function provided in a device that makes a connection request, and the target function indicates a function provided in a device that receives a connection request.

FIG. 6 is a diagram illustrating a message configuration in the communication procedure of the wireless communication terminal in the first embodiment.
FIGS. 6A, 6B, and 6C show messages for performing connection control in the data link layer protocol.
The message frames shown in each figure have a common frame structure.
The connection request message 100S has a frame structure. As elements constituting the frame structure, a transmission destination identifier (hereinafter referred to as transmission destination ID) 110, a transmission source identifier (hereinafter referred to as transmission source ID) 120, control data 130, data 140, and CRC 150 are provided.

In the transmission destination ID 110, an identifier (ID) of the other party that transmits the message is set. However, a special identifier (ID) such as FF-FF-FF-FF-FF-FF-FF-FF is set when the partner device is not specified in the connection request message. An identifier (ID) of the own device is set in the transmission source ID 120, and a message type and role change request information are set in the control data 130. The message type indicates control information for performing line connection control such as a connection request message M1, a connection permission message M2, and a connection rejection message M3.
In the role change request information, information indicating a role change request is set. The role change request is a request for changing the role of the counterpart device from the set role for the function for starting communication. For example, 1 is defined when a change is requested from the counterpart device, and 0 is defined when no change is requested.
In the data 140, data transfer protocol types that can be connected are set, and when there are a plurality of data transfer protocols that can be connected, they are listed. Also, by prioritizing in the order in which connections are expected by a plurality of data transfer protocols and enumerating the data transfer protocol types in descending order of priority, a desired data transfer protocol can be easily selected by negotiation with the counterpart device. .
CRC 150 indicates information obtained by performing a CRC operation on the data indicated by this frame.

FIG. 6A shows the configuration of the connection request message 100S.
The control data 130 in the connection request message 100S includes a connection request message M1 and role change request information C4.
In accordance with the connection request for the communication line, “0” is set in the role change request information C4 in the connection request message 100S that does not notify the role change request. The connection request message 100S is a message indicating only a communication line connection request.
Also, “1” is set in the role change request information C4 in the connection request message 100S4 for notifying a request to change the role of the counterpart device from the target to the host in accordance with the communication line connection request.

FIG. 6B shows the configuration of the connection permission message 100R.
The control data 130 in the connection permission message 100R includes a connection permission message M2. The connection permission message 100R is a message that makes a connection permission response in response to the received connection request messages 100S4 and 100S.
The connection permission message 100R is configured, the transmission destination ID and the transmission source ID are the same as those of the connection request message, the message type (connection permission message) or the like is set in the control data, and the data transfer protocol type for connection is set in the data Is set.

FIG. 6C shows the configuration of the connection rejection message 100A.
The control data 130 in the connection rejection message 100A includes a connection rejection message M3 and role change request information C5.
“0” is set in the role change request information C5 in the connection reject message 100A that does not notify the role change request in accordance with the connection reject response to the communication line connection request. The connection rejection message 100A is a message indicating only connection rejection of a connection request for a communication line.
In accordance with the connection rejection response to the communication line connection request, “1” is set in the role change request information C5 in the connection rejection message 100A5 notifying the role change request.
Furthermore, data transfer protocol types that can be supported by the device itself are set in the data 140, and when there are a plurality of protocols that can be supported, they are listed.

FIG. 7 is a block diagram illustrating the role of the wireless communication terminal at the start of connection processing in the first embodiment.
The electronic camera device 10h shown in the figure is scheduled to operate assuming the application of FIG. 4A and is set to the host mode. The printer device 20h is scheduled to operate assuming the application of FIG. 4B and is set to the host mode. That is, both devices are scheduled to operate assuming different applications, and since both devices are set to the host mode, communication cannot be started in this state.
Accordingly, processing for adapting to an application in which a user 31 (not shown) operates the electronic camera device 10h to make a print request to the printer device 20 will be described below.
In order to adapt to such a situation, the electronic camera device 10 can change the communication mode setting change of the printer device 20 to be in the state shown in FIG. And

FIG. 8 is a sequence diagram illustrating a role change procedure in the connection process according to the first embodiment.
The initial state of the role in the data link layer protocol in the sequence diagram shown in the figure is that the setting of the electronic camera device 10 shown in FIG. 7 is set to the host mode, and the setting of the printer device 20 is also set to the host mode. Yes. That is, the host mode processing unit 15h and the host mode processing unit 23h are in a functioning state (steps Sa11 and 12).
An operation for printing image data stored in the recording medium 12 of the camera device 10 by the user 31 in the printer device 20 is performed on the operation unit of the camera device 10, and the operation unit 13 detects the operation input. The operation unit control processing unit 17c in the control unit 17 detects the communication request as a result of the determination based on the detection result of the operation unit 13 (step Sa13).
The communication control processing unit 17e in the control unit 17 instructs the host mode processing unit 15h in the communication control unit 15 to transmit the connection request message 100S (step Sa14t). Even if the printer device 20 receives the connection request message 100S, the host mode processing unit 23h in the communication control unit 23 cannot respond, but does not respond (step Sa14r).

On the other hand, when the communication control processing unit 25 c in the printer device 20 instructs the host mode processing unit 23 h in the communication control unit 23 to send the connection request message 100 S, the connection request message 100 S is sent to the electronic camera device 10. The communication control unit 23 continues to send the connection request message 100S at a predetermined cycle T2 until a connection permission message is detected. For example, the predetermined period T2 is set to about 10 times per second (step Sa15t).
Even if the electronic camera device 10 receives the connection request message 100S from the printer device 20, the host mode processing unit 15h in the communication control unit 15 cannot respond, and does not respond (step Sa15r).
The terminal determination processing unit 17e1 in the communication control processing unit 17 does not receive the connection permission message 100R for the connection request message 100S transmitted by the electronic camera device 10 until a predetermined time T1 elapses. This is because the printer device 20 (host mode processing unit 23h) does not transmit the connection permission message 100R in response to the connection request message 100S transmitted by the electronic camera device 10. When the time T1 elapses, the terminal determination processing unit 17e1 determines that the printer device 20 is operating in the same host mode. Based on the result determined by the terminal determination processing unit 17e1, the mode change request processing unit 17e2 interrupts the operation of the host mode processing unit 15h in the communication control unit 15 and switches to the target mode processing unit 15t. The period T1 is sufficiently longer than the period T2, and is set to about 1 second, for example (step Sa16).

By switching the communication mode, the electronic camera device 10 can receive the connection request message 100S from the printer device 20. The target mode processing unit 15t in the communication control unit 15 detects the connection request message 100S from the printer device 20, and notifies the detection result to the control unit 17 (step Sa17r).
The mode change request processing unit 17e2 instructs the target mode processing unit 15t in the communication control unit 15 to send a connection rejection message 100A5 including a role change request.
Based on the instruction, the target mode processing unit 15t transmits a connection rejection message 100A5 including a role change request (step Sa18t).
In the communication control unit 23 in the printer device 20, the host mode processing unit 23h detects the connection rejection message 100A5 including the sent role change request, and notifies the control unit 25 of the detection result (step Sa18r).

After step Sa18t, the mode change request processing unit 17e2 interrupts the operation of the target mode processing unit 15t in the communication control unit 15 and switches to the host mode processing unit 15h (step Sa19).
Based on the notification of the detection result at step Sa18r, the mode change request processing unit 25e2 interrupts the operation of the host mode processing unit 23h in the communication control unit 23 and switches to the target mode processing unit 15t (step Sa20).

Again, the mode change request processing unit 17e2 in the control unit 17 instructs the host mode processing unit 15h in the communication control unit 15 to transmit the connection request message 100S (step Sa21t). The printer device 20 receives the connection request message 100S by the target mode processing unit 23t, and notifies the detection result to the control unit 25 (step Sa21r).
In response to the connection request message 100S received by the printer device 20, the target mode processing unit 23t sends a connection permission message 100R to the electronic camera device 10 (step Sa22t).
The communication control processing unit 17e in the electronic camera device 10 receives the connection permission message 100R transmitted from the printer device 20 (step Sa22r).
Through the procedure described above, a communication line using the electronic camera device 10 as the host mode can be established.

(Second Embodiment)
FIG. 9 is a block diagram illustrating the role of the wireless communication terminal at the start of connection processing in the first embodiment.
The electronic camera device 10t shown in the drawing is scheduled to operate assuming the application of FIG. 4B, and is set to the target mode. The printer device 20t is scheduled to operate assuming the application of FIG. 4A and is set to the target mode. That is, both devices are scheduled to operate assuming different applications, and since both devices are set to the target mode, communication cannot be performed as it is.
Accordingly, processing for adapting to an application in which a user 31 (not shown) operates the electronic camera device 10h to make a print request to the printer device 20 will be described below.
In order to adapt to such a situation, the electronic camera device 10 can change the communication mode setting change of the printer device 20 to be in the state shown in FIG. And

FIG. 10 is a sequence diagram illustrating a role changing procedure in the connection process according to the second embodiment.
In the initial state of the role in the data link layer protocol in the sequence diagram shown in the figure, the setting of the electronic camera device 10 shown in FIG. 9 is set to the target mode, and the setting of the printer device 20 is also set to the target mode. That is, the target mode processing unit 15t and the target mode processing unit 23t are in a functioning state (steps Sb21 and Sb22).
An operation for printing image data stored in the recording medium 12 of the camera device 10 by the user 31 in the printer device 20 is performed on the operation unit of the camera device 10, and the operation unit 13 detects the operation input. The operation unit control processing unit 17c in the control unit 17 detects the communication request as a result of the determination based on the detection result of the operation unit 13 (step Sb23).
The target mode processing unit 15t of the camera device 10 continues the reception state, but since the printer device 20 does not send a message, the predetermined time T1 elapses without receiving anything. The period T1 is set to about 1 second, for example (step Sb24).

  Since the terminal determination processing unit 17e1 in the communication control processing unit 17 received nothing until a predetermined time T1 has elapsed, the printer device 20 determines that it is operating in the same communication mode. Based on the result of the determination, the mode change request processing unit 17e2 interrupts the operation of the target mode processing unit 15t in the communication control unit 15 and switches to the host mode processing unit 15h (step Sb25).

The communication control processing unit 17e in the control unit 17 instructs the host mode processing unit 15h in the communication control unit 15 to transmit the connection request message 100S4 including the role change request (step Sb26t).
The printer 20 receives the connection request message 100S including the role change request, and the target mode processing unit 23t in the communication control unit 23 receives the connection request message 100S from the received connection request message 100S together with the role change request included. Is detected (step Sb26r).
In response to the connection request message 100S received by the printer device 20, the target mode processing unit 23t sends a connection permission message 100R to the electronic camera device 10 (step Sb27t).
The communication control processing unit 17e in the electronic camera device 10 receives the connection permission message 100R transmitted from the printer device 20 (step Sb27r).

After step Sa27t, the mode change request processing unit 17e2 interrupts the operation of the host mode processing unit 15h in the communication control unit 15 and switches to the target mode processing unit 15t (step Sb28).
Based on the notification of the detection result at step Sa27r, the mode change request processing unit 25e2 interrupts the operation of the target mode processing unit 23t in the communication control unit 23 and switches to the host mode processing unit 23h (step Sb29).
On the other hand, when the communication control processing unit 25c in the printer device 20 instructs the host mode processing unit 23h in the communication control unit 23 to send the connection request message 100S, the connection control message 100S is sent to the electronic camera device 10 (step Sb30t). ). The electronic camera device 10 receives the connection request message 100S from the printer device 20, and notifies the control unit 17 of the received result (step Sb30r).
In response to the connection request message 100S received by the electronic camera device 10, the target mode processing unit 15t sends a connection permission message 100R to the printer device 20 (step Sb31). The communication control processing unit 25e in the printer device 20 receives the connection permission message 100R transmitted by the electronic camera device 10 (step Sb31r).
Through the procedure described above, a communication line using the electronic camera device 10 as the host mode can be established.

That is, the electronic camera device 10 (printer device 20) is either a host mode that transmits a connection request of the data link layer protocol in the wireless communication to a partner terminal that performs wireless communication or a target mode that does not transmit a connection request. One-to-one wireless communication is performed with the printer device 20 (electronic camera device 10) that operates in the communication mode of the above without passing through a terminal that relays the wireless communication. The communication control unit 15 (23) of the electronic camera device 10 (printer device 20) has a host mode and a target mode, and operates in one of the communication modes. The terminal determination unit determines whether there is a printer device 20 (electronic camera device 10) operating in the same communication mode as the communication mode operated by the communication control unit 15 (23). When the terminal determination unit determines that the printer device 20 (electronic camera device 10) exists, the mode change request unit 17e2 (23c2) requests the printer device 20 (electronic camera device 10) to change the communication mode. To do.
This makes it possible to allocate a wireless communication terminal operating in the host mode to a desired wireless communication terminal for line connection processing in one-to-one wireless communication. Then, the wireless communication terminal can start the line connection process from the desired wireless communication terminal side.

In addition, when the communication mode operated by the communication control unit 15 (23) is the host mode, the terminal determination unit sends a response to the connection request in advance from the printer device 20 (electronic camera device 10) that is the connection request transmission destination. If it is not received within a predetermined period, or if a connection request is received from the printer device 20 (electronic camera device 10), it is determined that the printer device 20 (electronic camera device 10) exists.
Accordingly, the electronic camera device 10 (printer device 20) can determine that the printer device 20 (electronic camera device 10) is also operating in the host mode.

Further, the communication control unit 15 (23) determines that the printer device 20 (electronic camera device 10) exists by the terminal determination unit when the communication mode operated by the communication control unit 15 (23) is the host mode. In this case, the communication mode is operated in the target mode, and if it is determined that the mode change request unit 17e2 (23c2) exists, the communication mode is set in response to a connection request from the printer device 20 (electronic camera device 10). Request changes.
Thereby, the electronic camera device 10 (printer device 20) can change the operation mode of the printer device 20 (electronic camera device 10) to the target mode.

The mode change request unit 17e2 (23c2) responds with a connection rejection response to the connection request and requests a change of the communication mode.
As a result, the electronic camera device 10 (printer device 20) can respond to the request for changing the operation mode of the printer device 20 (electronic camera device 10) to the target mode together with a connection rejection response to the connection request.

The terminal determination unit does not receive a connection request from the printer device 20 (electronic camera device 10) within a predetermined time when the communication mode operated by the communication control unit 15 (23) is the target mode. Is determined that the printer device 20 (electronic camera device 10) is present.
Thus, the electronic camera device 10 (printer device 20) can determine that the printer device 20 (electronic camera device 10) is also operating in the target mode.

The communication control unit 15 (23) determines that the printer device 20 (electronic camera device 10) exists by the terminal determination unit when the communication mode operated by the communication control unit 15 (23) is the target mode. In this case, the communication mode is operated in the host mode. When it is determined that the printer device 20 (electronic camera device 10) exists, the mode change request unit 17e2 (23c2) requests the printer device 20 (electronic camera device 10) to change the communication mode. .
When the mode change request unit 17e2 (23c2) determines that the printer device 20 (electronic camera device 10) exists by the terminal determination unit when the communication mode operated by the communication control unit 15 (23) is the target mode. First, the communication control unit 15 (23) operates the communication mode in the host mode, and requests the printer device 20 (electronic camera device 10) to change the communication mode.
Thereby, the electronic camera device 10 (printer device 20) can change the operation mode of the printer device 20 (electronic camera device 10) to the host mode.

The mode change request unit 17e2 (23c2) transmits a connection request to the printer device 20 (electronic camera device 10) and requests a change of the communication mode.
As a result, the electronic camera device 10 (printer device 20) can respond to the request for changing the operation mode of the printer device 20 (electronic camera device 10) to the host mode together with a connection rejection response to the connection request.

That is, when the above embodiment is arranged, the wireless communication system 1 performs one-to-one wireless communication without using a terminal that relays the electronic camera device 10 and the printer device 20 facing each other.
The electronic camera device 10 (printer device 20) in the wireless communication system 1 has a host mode for transmitting a connection request of the data link layer protocol in the wireless communication to a counterpart terminal that performs wireless communication, and a target that does not transmit the connection request. Configured with modes. The first communication control unit 15 (23) in the electronic camera device 10 (printer device 20) operates in either the host mode or the target mode. The terminal determination unit determines whether there is a printer device 20 (electronic camera device 10) operating in the same communication mode as the communication mode operated by the communication control unit 15 (23). The mode change request unit 17e2 (23c2) requests the printer device 20 (electronic camera device 10) to change the communication mode when the terminal determination unit determines that the printer device 20 (electronic camera device 10) exists. .
The printer device 20 (electronic camera device 10) in the wireless communication system 1 is configured to have a host mode and a target mode. The communication control unit 23 (15) in the printer device 20 (electronic camera device 10) operates in either the host mode or the target mode, and changes the communication mode from the electronic camera device 10 (printer device 20). In response to the request, the operating communication mode is changed.
As a result, a communication terminal operating in the host mode can be assigned to either the desired electronic camera device 10 or the printer device 20 for line connection processing in one-to-one wireless communication. The wireless communication system 1 can start the line connection process from the desired communication terminal side.

In addition, the electronic camera device 10 (printer device 20) has a host mode that transmits a connection request of the data link layer protocol in the wireless communication to a counterpart terminal that performs wireless communication and a target mode that does not transmit the connection request. Then, one-to-one wireless communication is performed with the printer device 20 (electronic camera device 10) operating in any one of the host mode and the target mode without using a terminal that relays the wireless communication. The communication control unit 15 (23) in the electronic camera device 10 (printer device 20) has a host mode and a target mode, and operates in either the host mode or the target mode, and the printer device 20 (electronic device). When there is a request for changing the communication mode from the camera device 10), the communication mode being operated is changed in response to the request.
As a result, the electronic camera device 10 (printer device 20) operating in the host mode can be assigned to a desired wireless communication terminal for line connection processing in one-to-one wireless communication. Then, the electronic camera device 10 (printer device 20) can start the line connection processing from the desired wireless communication terminal side by switching the communication mode in response to a request from the printer device 20 (electronic camera device 10) side. It becomes possible.

The present invention is not limited to the above embodiments, and can be modified without departing from the spirit of the present invention. Although the electronic camera device 10 and the printer device 20 have been illustrated and described as the wireless communication terminals constituting the wireless communication system 1 of the present invention, other forms of devices that realize the above-described configuration may be used.
Also, the configurations of the electronic camera device 10 and the printer device 20 are not limited to the illustrated configurations, and other configurations may be employed.
Moreover, although the example in which the role change request is information assigned in the same message by the connection request message 100S4 and the connection rejection message 100A5 is shown, the messages may be divided and sent by separate messages.
Further, the user operates the electronic camera device 10 when changing the role assignment, but may operate the printer device 20.
In addition, the control unit 17 (23) performs the arithmetic processing unit by the CPU, but it can be easily executed by a processing program using a DSP (Digital Signal Processor) or the like.

  Further, the wireless communication terminals exemplified as the electronic camera device 10 and the printer device 20 described above have a computer system therein. The process related to the communication control described above is stored in a computer-readable recording medium in the form of a program, and the above process is performed by the computer reading and executing the program. Here, the computer-readable recording medium means a magnetic disk, a magneto-optical disk, a CD-ROM, a DVD-ROM, a semiconductor memory, or the like. Alternatively, the computer program may be distributed to the computer via a communication line, and the computer that has received the distribution may execute the program.

  Note that the wireless communication system of the present invention corresponds to the wireless communication system 1. The wireless communication terminal and the external terminal of the present invention include the electronic camera device 10 (10h, 10t) and the printer device 20 (20h, 20t), or the printer device 20 (20h, 20t) and the electronic camera device 10 (10h, 10t). In addition, the first communication terminal and the second communication terminal of the present invention include the electronic camera device 10 (10h, 10t) and the printer device 20 (20h, 20t), or the printer device 20 (20h, 20t) and the electronic camera device 10. It corresponds to (10h, 10t). The communication control unit of the present invention corresponds to the communication control units 15 and 23. The terminal determination unit of the present invention corresponds to the terminal determination units 17e1 and 25c1. The mode change request unit of the present invention corresponds to the mode change request units 17e2 and 25c2. The first communication mode of the present invention corresponds to the host mode. The second communication mode of the present invention corresponds to the target mode.

It is a block diagram which shows the structure of the communication system in 1st Embodiment of this invention. It is a block diagram which shows the structure of the radio | wireless communication terminal in 1st Embodiment. It is a block diagram which shows the structure of the radio | wireless communication terminal in 1st Embodiment. It is a figure which shows the role of the connection procedure of the radio | wireless communication terminal in 1st Embodiment. It is a sequence diagram which shows the connection procedure of the radio | wireless communication terminal in 1st Embodiment. It is a figure which shows the message structure in the communication procedure of the radio | wireless communication terminal in 1st Embodiment. It is a block diagram which shows the role of the radio | wireless communication terminal at the time of the connection process start in 1st Embodiment. It is a sequence diagram which shows the role change procedure in the connection process in 1st Embodiment. It is a block diagram which shows the role of the radio | wireless communication terminal at the time of the connection process start in 2nd Embodiment. It is a sequence diagram which shows the role change procedure in the connection process in 2nd Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Electronic camera apparatus 11 Imaging part 12 Recording medium 13 Operation part 14 Display part 15 Communication control part 16 Storage part 17 Control part 17a Imaging part control processing part 17b Recording medium control part 17c Operation part control processing part 17d Display control processing part 17e Communication Control processing unit 17e1 Terminal determination processing unit 17e2 Mode change request processing unit

Claims (9)

A first communication mode for transmitting a data link layer protocol connection request in the wireless communication to a counterpart terminal for wireless communication, and a second communication mode for not transmitting the connection request. A wireless communication terminal that performs one-to-one wireless communication with an external terminal that operates in any one of the two communication modes without using a terminal that relays the wireless communication;
A communication control unit having the first communication mode and the second communication mode and operating in any one of the first communication mode and the second communication mode;
A terminal determination unit that determines whether or not there is the external terminal operating in the same communication mode as the communication mode operated in the communication control unit;
If the terminal determination unit determines that the external terminal exists, a mode change request unit that requests the external terminal to change the communication mode;
A wireless communication terminal comprising: The terminal determination unit
When the communication mode operated by the communication control unit is the first communication mode, a response to the connection request is not received within a predetermined period from the external terminal that is the transmission destination of the connection request, or The wireless communication terminal according to claim 1, wherein when the connection request is received from the external terminal, it is determined that the external terminal exists. The communication control unit
When the terminal determination unit determines that the external terminal exists when the communication mode operated by the communication control unit is the first communication mode, the communication mode is operated in the second communication mode. ,
The mode change request unit is
2. The wireless communication terminal according to claim 1, wherein, when it is determined that the communication terminal is present, a change in the communication mode is requested in response to the connection request from the external terminal. The mode change request unit is
The wireless communication terminal according to claim 3, wherein a connection rejection response to the connection request is responded and a change of the communication mode is requested. The terminal determination unit
When the communication mode operated by the communication control unit is the second communication mode and the connection request is not received from the external terminal within a predetermined time, it is determined that the external terminal exists. The wireless communication terminal according to claim 1. The communication control unit
When the terminal determination unit determines that the external terminal exists when the communication mode operated by the communication control unit is the second communication mode, the communication mode is operated in the first communication mode. ,
The mode change request unit is
The wireless communication terminal according to claim 1, wherein when it is determined that the external terminal exists, the external terminal is requested to change the communication mode. The mode change request unit is
The wireless communication terminal according to claim 6, wherein the connection request to the external terminal is transmitted and the change of the communication mode is requested. A wireless communication system that performs one-to-one wireless communication without using a terminal that relays the first communication terminal and the second communication terminal facing each other,
A first communication mode for transmitting a connection request of a data link layer protocol in the wireless communication to a counterpart terminal performing wireless communication; a second communication mode for not transmitting the connection request; and the first communication mode and A first communication control unit that operates in any one of the second communication modes;
A terminal determination unit that determines whether or not there is the second communication terminal operating in the same communication mode as the communication mode operated in the first communication control unit;
When it is determined by the terminal determination unit that the second communication terminal exists, a mode change request unit that requests the second communication terminal to change the communication mode;
A first communication terminal comprising:
A request to change the communication mode from the first communication terminal while having the first communication mode and the second communication mode and operating in any one of the first communication mode and the second communication mode And a second communication control unit that changes the operating communication mode,
A second communication terminal comprising:
A wireless communication system comprising: A first communication mode for transmitting a data link layer protocol connection request in the wireless communication to a counterpart terminal for wireless communication, and a second communication mode for not transmitting the connection request. A wireless communication terminal that performs one-to-one wireless communication without going through a terminal that relays the wireless communication with an external terminal that operates in any one of the two communication modes;
The first communication mode and the second communication mode are provided, the operation is performed in any one of the first communication mode and the second communication mode, and a request for changing the communication mode is received from the external terminal. A communication control unit that changes the operating communication mode in response to the request;
A wireless communication terminal comprising:

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