JP2013236316A - Communication terminal device and communication method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a user load related to the management and the operation of a wireless LAN communication network, with enhanced security of the wireless LAN communication network.SOLUTION: A communication terminal device includes: a wireless LAN communication unit for performing communication by connecting to a wireless LAN communication network; by identifying equipment within a communication range by a short range radio communication method, having a narrower communication range than the wireless LAN communication, a short range radio communication unit for establishing communication with the equipment; a communication control unit for controlling communication of the wireless LAN communication unit and the short range radio communication unit; and a storage unit for storing in advance equipment identification information to be identified by the short range radio communication unit. When communication with the equipment identified by the identification information through the short range radio communication unit is established, the communication control unit permits a connection to the wireless LAN communication network, whereas when communication with the equipment is not established, the communication control unit prohibits a connection to the wireless LAN communication network.

Description

  The present invention relates to a wireless LAN communication and a communication terminal device having a function of short-range wireless communication having a narrower communication range than wireless LAN communication and a communication method therefor.

In recent years, the performance of wireless LAN master devices such as wireless access points and wireless routers has improved, and it has become available at a low price in the market. Mobile wireless LAN access points have become widespread, and wireless LAN environments are being prepared. Along with this, the utilization rate of wireless communication is increasing rapidly.
Further, in the future, it is expected that wireless LAN communication by an ad hoc method in which communication is performed directly between devices without using a wireless LAN base unit will be widespread. Therefore, the demand for wireless LAN is expected to increase further.

On the other hand, with the spread of business related to so-called cloud computing, mobile devices (communication terminal devices) such as smartphones and tablet terminals are spreading. Smartphones and tablet terminals are excellent in portability, and are assumed to be carried around in various places. As a standard communication means of these communication terminal apparatuses, a wireless LAN based on the IEEE802.11 standard is generally adopted.
The communication distance of the wireless LAN according to the IEEE802.11 standard is generally said to be about 40 m, although it varies depending on the usage environment such as obstacles between communication devices and radio wave conditions. As a basic connection method to a communication network using a wireless LAN, a method using an SSID that is an ID of a wireless LAN base unit and a password is used. That is, the user of the communication terminal device can connect to the wireless LAN communication network via the wireless LAN base unit by inputting the above-described SSID and password. It can be said that the security of connection permission / inhibition is managed by the SSID and password of the wireless LAN. Therefore, anyone who knows only the SSID and password can easily connect to the wireless LAN communication network.

In addition, communication terminal devices such as smartphones and tablet terminals comply with the Bluetooth (registered trademark) standard in order to easily exchange data with peripheral devices such as external storage and printers and personal computers as flagships. In many cases, a short-range wireless communication function represented by a wireless LAN is provided separately from the wireless LAN.
Regarding communication of such a communication terminal device, when the terminal enters a communication range where Bluetooth connection is possible, activates the Bluetooth wireless unit of the terminal and turns off the Bluetooth wireless unit when leaving the area. Has been proposed.

JP 2004-350108 A

  However, for example, when accessing a wireless LAN communication network using a communication terminal device in a company office or school, it is necessary to consider security such as confidentiality of communication contents. Therefore, a state where anyone can connect to the wireless LAN communication network from anywhere must be avoided. Considering the case where security is to be ensured based on the communication range, the wireless LAN according to the IEEE802.11 standard has a communication range of about 40 m as described above. For example, there is a case where a company's connection to a wireless LAN communication network is desired to be limited to a specific conference room of the company. In addition, there is a case where it is desired to limit the connection to a certain school's wireless LAN communication network to a specific classroom of the school. However, in the communication range of about 40 m, it is possible to connect to the wireless LAN communication network from outside the conference room or classroom. Therefore, in this case, it is concluded that it is difficult to ensure security based on the communication range.

  Therefore, users who can connect to the wireless LAN communication network are generally restricted using SSID and password. However, an SSID and a password must be disclosed to each member who uses a wireless LAN communication network of a certain department if it is a company, and all students who use the wireless LAN communication network of a school if it is a school. In this case, it is impossible to deny the possibility that the secret is leaked to outsiders by carelessness of the person who disclosed the SSID and password. From the standpoint of the administrator of the wireless LAN communication network, secret management is not easy. From the standpoint of the user who disclosed the SSID and password, the disclosed content must be remembered, and it is necessary to input the content every time the wireless LAN communication network is connected. It can be said that the burden of management and operation is large and troublesome for each user. Once a third party knows the SSID and password, the connection can be made anywhere at any time from the wireless LAN connection range.

  The present invention has been made in consideration of the above circumstances, and is a communication that can reduce the burden on the management and operation of users of a wireless LAN communication network and can further enhance the security of the wireless LAN communication network. A terminal device and a communication method thereof are provided.

The present invention identifies a wireless LAN communication unit that communicates by connecting to a wireless LAN communication network, and a device in the communication range by using a short-range wireless communication method having a communication range narrower than the wireless LAN communication. Identification information of a device to be identified by the short-range wireless communication unit, a short-range wireless communication unit that establishes communication with the communication unit, a communication control unit that controls communication by the wireless LAN communication unit and the short-range wireless communication unit, A storage unit that stores in advance, the communication control unit to the wireless LAN communication network when communication via the short-range wireless communication unit is established with the device specified by the identification information The communication terminal apparatus is characterized in that connection to the wireless LAN communication network is prohibited when communication with the device is not established and communication with the device is not established.
That is, according to the present invention, a communication terminal device that can be connected to a wireless LAN communication network is applied only when short-range wireless communication with a predetermined device is established.

  Further, from a different point of view, the present invention uses a short-range wireless communication unit that performs short-range wireless communication in a communication range narrower than wireless LAN communication in which a computer connects to a wireless LAN communication network and performs communication. The short-range wireless communication with the device specified by the identification information by establishing communication with the device located in the storage, accessing a storage unit that stores in advance the identification information of the device to be identified by the short-range wireless communication Connection to the wireless LAN communication network by the wireless LAN communication is permitted when communication via the communication unit is established, and connection to the wireless LAN communication network is permitted when communication with the device is not established. Provided is a communication method characterized by prohibition.

The communication terminal device according to the present invention includes a short-range wireless communication unit having a communication range narrower than wireless LAN communication, a communication control unit, and a storage unit that stores in advance identification information indicating a specific device, The unit permits connection to the wireless LAN communication network when communication via the short-range wireless communication unit is established with the device specified by the identification information, and communication with the device is permitted. When it is not established, connection to the wireless LAN communication network is prohibited. Therefore, the range that can be connected to the wireless LAN communication network is limited to the communication range in which short-range wireless communication with a specific device is possible. It becomes possible to limit almost to the conference room and classroom. In other words, if security for entering and exiting conference rooms and classrooms within a range where short-range wireless communication is possible with a specific device is managed, security for connection to the wireless LAN communication network is ensured.
The communication method of the present invention has the same effect.

This invention will be described more specifically.
In this invention, the wireless LAN communication network is a LAN (Local Area Network) communication network constructed using wireless communication means. A specific wireless LAN communication method includes a communication method compliant with the IEEE802.11 standard, but the essence of the present invention is not limited to this.

  The short-range wireless communication method is a wireless communication method having a communication range narrower than that of the wireless LAN communication method. A typical example is a Bluetooth communication method, but an alternative communication method may be used. An example is a communication system called UWB (Ultra Wide Band). Establishing communication with an external device by the short-range wireless communication method is not limited to the case where data is actually transmitted / received to / from the device, but includes a case where data can be transmitted / received to / from the device.

  The communication control unit controls communication by the wireless LAN communication unit and the short-range wireless communication unit, and the function is realized mainly by the CPU executing the processing program. The hardware includes the CPU, a circuit around the CPU, a communication interface circuit, and a memory that stores the processing program.

The identification information is data used by the short-range wireless communication unit and / or the communication control unit, and is used to identify a device that performs communication using the short-range wireless communication method. In other words, in communication using the short-range wireless communication method, a partner device with which communication is performed has unique identification information, and each device is identified using the identification information. Therefore, according to the present invention, the communication terminal device can be connected to the wireless LAN communication network when communication using a short-range wireless communication method is established with a specific device installed at a specific location.
Regarding correspondence with the embodiment described later, the wireless LAN communication unit corresponds to the wireless LAN interface of the embodiment, the short-range wireless communication unit corresponds to the Bluetooth interface of the embodiment, and the communication control unit stores in the terminal control unit. Each part is contained in a memory.

It is explanatory drawing which shows the electrical structure of the communication terminal device of this invention. It is explanatory drawing which shows the procedure of operation for connecting the communication terminal 11 of FIG. 1 to a wireless LAN communication network. It is a 1st flowchart which shows the process regarding the connection to a wireless LAN communication network by the terminal control part which concerns on this invention. It is a 2nd flowchart which shows the process regarding the connection to a wireless LAN communication network by the terminal control part which concerns on this invention. It is a 3rd flowchart which shows the process regarding the connection to the wireless LAN communication network by the terminal control part which concerns on this invention. It is a 4th flowchart which shows the process regarding the connection to a wireless LAN communication network by the terminal control part which concerns on this invention.

Hereinafter, preferred embodiments of the present invention will be described.
The communication control unit may control to disconnect the connection to the wireless LAN communication network when communication with the device specified by the identification information is disconnected. In this way, when communication with the device is disconnected, the wireless LAN connection is also disconnected. Therefore, management is performed when the administrator of the device, for example, a wireless LAN communication network is the administrator of the device. The connection control to the wireless LAN is possible on the part of the person.

  The short-range wireless communication method may be a Bluetooth standard communication method. Bluetooth communication differs depending on the obstacles between devices and radio wave conditions, but is generally said to have a communication range of about 10m. For example, it is suitable when the connection to the wireless LAN communication network is restricted in a specific conference room or classroom. Communication range.

Furthermore, the short-range wireless communication unit receives information necessary for connection to the wireless LAN communication network from the device specified by the identification information, and the wireless communication control unit uses the received information to perform a wireless LAN communication. You may control to connect to a communication network. In this way, the user of the wireless LAN communication network does not need to manage information necessary for connection, and it is not necessary to input the information every time the connection to the wireless LAN communication network is made. The burden on management and operation is reduced.
Preferred embodiments of the present invention include combinations of any of the plurality of embodiments shown here.
Hereinafter, the present invention will be described in more detail with reference to the drawings. In addition, the following description is an illustration in all the points, Comprising: It should not be interpreted as limiting this invention.

≪Configuration of communication terminal device≫
FIG. 1 is an explanatory diagram showing an electrical configuration of a communication terminal apparatus according to the present invention. In FIG. 1, a communication terminal 11 as a communication terminal device includes a wireless LAN communication interface 13, a Bluetooth interface 15, a memory 16, a terminal control unit 17, a touch panel 18 and a display 19. As a specific aspect of the communication terminal 11, it will be easy to understand if an apparatus such as a smartphone, a tablet terminal, or a mobile PC is imaged.
The communication terminal 11 performs wireless communication with an external wireless LAN base device 21 and accesses the wireless LAN communication network via the wireless LAN base device 21. Furthermore, the communication terminal 11 communicates with the Bluetooth compatible device 31.

  The wireless LAN interface 13 provided in the communication terminal 11 is an interface circuit for performing communication with the wireless LAN base unit 21. Communication with the wireless LAN base unit 21 is performed by a communication method compliant with the IEEE802.11 standard. IEEE802.11 standards include IEEE802.11b / g / n using 2.4 GHz and IEEE802.11a / n using 5 GHz band. The communication terminal 11 only needs to conform to any one of these standards, but preferably corresponds to a plurality of them, more preferably all of them, depending on the capability of the wireless LAN base unit 21. Select one of the standards with high communication capability and communicate.

  The connection procedure to the wireless LAN communication network is performed when the terminal control unit 17 receives a predetermined operation performed by the user on the touch panel 18 of the communication terminal 11 or a timer (not shown) of the terminal control unit 17 has. Started when a timeout occurs. A search for a wireless LAN access point is performed by a procedure compliant with the IEEE 802.11 standard, and the wireless LAN base device 21 is detected as an access point to which the communication terminal 11 can be connected. When the wireless LAN base device 21 is detected, the communication terminal 11 transmits an authentication SSID and password. When the wireless LAN base unit 21 authenticates the content, connection to the wireless LAN communication network is permitted. After the authentication is obtained, the communication terminal 11 can communicate with other devices on the wireless LAN communication network via the wireless LAN base unit 21 to exchange data.

  The Bluetooth interface 15 is an interface circuit for performing communication with the Bluetooth compatible device 31. The Bluetooth communication standard has a plurality of versions such as V2.1 and V3.0, but any version may be supported. Preferably, the Bluetooth interface 15 is compatible with any version, and a higher version corresponding to the capability of the counterpart Bluetooth-compatible device is selected and communicated.

The memory 16 includes at least a readable / writable nonvolatile memory such as a flash memory, and the identification information according to the present invention is stored in the nonvolatile memory. Furthermore, a control program to be executed by the CPU of the terminal control unit 17 is stored.
The display 19 performs various displays according to operations received by the touch panel 18 under the control of the terminal control unit 17, data in the memory 16, communication status, and the like. For example, a display indicating a connection status of Bluetooth or wireless LAN Message display.
The touch panel 18 is disposed on the display surface of the display 19 and receives an operation from the user.

  The terminal control unit 17 includes a CPU that executes processing according to a control program, a timer, and hardware of an input / output circuit. The process includes a determination as to whether or not communication with a Bluetooth compatible device corresponding to the identification information stored in the memory 16 has been established in connection with the wireless LAN communication network. Further, it includes processing related to authentication when communication is established and communication processing with the wireless LAN base unit 21 after authentication.

  The external wireless LAN base unit 21 includes a base unit wireless LAN interface 23 as an interface circuit and a base unit control unit 25 for controlling the base unit. The base unit wireless LAN interface 23 is an interface circuit corresponding to the wireless LAN interface 13 on the communication terminal 11 side. The base unit control unit 25 determines which standard of IEEE802.11a / b / g / n is used for wireless connection with the communication terminal 11 and executes processing for instructing the communication terminal 11 on a connection method.

  The external Bluetooth device 31 includes a device Bluetooth interface 33 as an interface circuit and a device control unit 35 that controls the device Bluetooth interface 33. The device Bluetooth interface 33 is an interface circuit corresponding to the Bluetooth interface 15 on the communication terminal 11 side. The device control unit 35 determines which version of the above-described Bluetooth connection to the communication terminal 11 and which profile is used, and executes processing such as an instruction on a connection method to the Bluetooth communication unit.

<< Operation related to connection to wireless LAN communication network >>
Next, an operation procedure to be performed by the user in order to connect the communication terminal 11 to the wireless LAN communication network will be described.
FIG. 2 is an explanatory diagram showing an operation procedure for connecting the communication terminal 11 of FIG. 1 to the wireless LAN communication network. The operation procedure will be described with reference to FIG. It is assumed that identification information relating to a specific device is registered in advance in the memory 16 of the communication terminal 11. The identification information is registered in a predetermined storage area of the memory 16 when the user of the communication terminal 11 executes a predetermined setting menu using the touch panel 18 and the display 19. In this embodiment, the specific device is a Bluetooth-compatible device 31 installed in a specific conference room or a specific classroom. The communication range of the Bluetooth compatible device 31 is limited to the conference room or classroom. Further, the conference room or classroom is included in the communication range of the wireless LAN base unit 21.

  In the aspect of FIG. 2, when the user of the communication terminal 11 tries to connect to the wireless LAN communication network in the conference room or classroom, a predetermined setting menu is executed using the touch panel 18 and the display 19, and the “display” shown in FIG. The terminal control unit 17 causes the display 19 to display the setting menu indicated by “1”. In the “display 1” setting menu, a “wireless LAN setting” button 41, a “Bluetooth setting” button 43, and a “VPN setting” button are displayed.

In order to connect to the communication network to the wireless LAN communication network, communication with a specific Bluetooth device must be established, so the user first presses the “Bluetooth setting” button 43. In response to this, the terminal control unit 17 causes the display 19 to display the menu shown in FIG. In the “Display 2” setting menu, a “Turn Bluetooth off” button and a “Bluetooth device detection” button 45 are displayed. Bluetooth is currently on. Therefore, the terminal control unit 17 displays a “turn off Bluetooth” button. When Bluetooth is off, display the “Turn on Bluetooth” button here. After confirming that Bluetooth is on, the user presses the “detect Bluetooth device” button 45 in the conference room or classroom. In response to this, the terminal control unit 17 controls the Bluetooth interface 15 and executes a Bluetooth device detection procedure. In the meantime, the contents as shown in FIG. 2 “Display 3” are displayed on the display 19. Here, “device A” is a device that has already been successfully connected via Bluetooth at the time of detecting a Bluetooth device.
When the detection of the Bluetooth device is completed, the terminal control unit 17 causes the display 19 to display the contents as shown in “Display 4” of FIG. Here, “device B” is a Bluetooth device newly detected and established for communication. This “device B” is the Bluetooth-compatible device 31 installed in the conference room or a specific classroom.

  Thus, after communication with the specific Bluetooth-compatible device 31 is established, the user performs an operation for connecting to the wireless LAN communication network. First, a predetermined operation is performed to display “Display 1” in FIG. 2 again. When the “wireless LAN setting” button 41 is pressed in the setting menu, the terminal control unit 17 displays the setting menu shown in FIG. 2 “display 5” in response thereto. In the “display 5” setting menu, a “turn off wireless LAN” button and a “network detection” button 47 are displayed. Here, it is assumed that the wireless LAN is currently on. Therefore, the terminal control unit 17 displays a “turn off wireless LAN” button. When the wireless LAN is off, a “turn on wireless LAN” button is displayed here. After confirming that the wireless LAN is on, the user presses the “detect network” button 47 in the conference room or classroom. In response to this, the terminal controller 17 controls the wireless LAN interface 13 to execute a network detection, that is, a wireless LAN access point detection procedure. In the meantime, the contents as shown in FIG. 2 “Display 6” are displayed on the display 19. Here, “network A” to “network D” are networks in which the SSID and password are stored in the memory 16 of the communication terminal 11.

  “Network B” is a wireless LAN network in which an access point is detected and connection is completed. This “network B” is a wireless LAN network that can be used in the conference room or a specific classroom. The wireless LAN base unit 21 is detected as a wireless LAN access point. When the access point is detected, an authentication procedure for connection to the wireless LAN communication network via the access point is performed. At this time, the communication terminal 11 has established communication with “device B” which is a specific Bluetooth device. Therefore, the authentication of the connection of the communication terminal 11 to the network B is successful.

  In the description of “Display 6”, it has been described that the network in which the SSID and the password are stored is displayed in the memory 16. These SSID and password may be stored in the memory 16 by the user executing a predetermined setting menu using the touch panel 18 and the display 19. In addition, for the “network B”, after the communication with the Bluetooth compatible device 31 is established, the Bluetooth compatible device 31 provides the SSID and password necessary for connection to the wireless LAN network, and the SSID received by the terminal control unit 17. And the password may be stored in the memory 16.

When the network detection is completed, the terminal control unit 17 causes the display 19 to display the contents as shown in “Display 7” of FIG.
Here, when communication with the “device B” which is the Bluetooth device is not established at the time of “display 6”, the terminal control unit 17 does not authenticate the connection of the communication terminal 11 to the network B. Alternatively, since the Bluetooth-compatible device 31 does not provide the SSID and password necessary for connection to the wireless LAN network, authentication fails as a result. In that case, the terminal control unit 17 causes the display 19 to display the contents as shown in FIG.
Here, the determination as to whether or not communication with the Bluetooth device is established is preferably in a state in which the Bluetooth device is detected or in a state in which the connection with the Bluetooth device is actually completed and in communication. This is configured so that the user can select using a predetermined setting menu.
The above is an operation example related to connection to a wireless LAN communication network.

As a modification, the terminal control unit 17 does not start detecting a Bluetooth device in response to the “detect Bluetooth device” button 45 of “display 2”, but repeatedly detects a Bluetooth device using a timer or the like. You may make it do. In this way, the user does not have to bother to operate the setting menu shown in “Display 2” in FIG. 2, but since the Bluetooth device detection is repeated, the processing load on the terminal control unit 17 increases.
Regarding the network detection, the terminal control unit 17 does not start the network detection in response to the “network detection” button 47 of “display 5”, but repeatedly performs the network detection using a timer or the like. You may do it. This eliminates the troublesome operation of the user for operating the setting menu shown in FIG. 2 “Display 5”, but increases the processing load on the terminal control unit 17 because the network detection is repeated.

≪Processing related to connection to wireless LAN communication network≫
Next, processing executed by the terminal control unit 17 according to the present invention regarding connection to a wireless LAN communication network will be described. When connecting to the wireless LAN communication network, the terminal control unit 17 confirms whether communication with a specific Bluetooth-compatible device 31 is established, and connects to the wireless LAN connection only when communication is established. Run.
3 to 6 are flowcharts showing processing executed by the terminal control unit according to the present invention regarding connection to a wireless LAN communication network. The processing will be described along the flowchart.

In FIG. 3, the terminal control unit 17 checks whether or not an operation for instructing execution of the wireless setting menu has been performed (step S11). When the operation is performed (Yes in Step S11), the terminal control unit 17 displays the contents as shown in “Display 1” in FIG. 2 on the display 19 (Step S13).
On the “display 1” screen, the terminal control unit 17 checks whether or not the “Bluetooth setting” button 43 has been pressed (step S21 in FIG. 4). When the button is pressed (Yes in step S21), the processing from step S23 onward in FIG. 4 is executed. On the other hand, when the “Bluetooth setting” button 43 has not been pressed, the terminal control unit 17 checks whether or not the “wireless LAN setting” button 41 has been pressed (step S51 in FIG. 5). If the button is pressed (Yes in step S51), the processing from step S53 onward in FIG. 5 is executed. On the other hand, when the “wireless LAN setting” button 41 has not been pressed, the terminal control unit 17 checks whether or not “VPN setting” has been pressed (step S81 in FIG. 6). If the button is pressed (Yes in step S81), the menu processing related to the VPN setting is executed (step S83 in FIG. 6), but the details are omitted because it is not related to the feature of the present invention. Thereafter, the routine proceeds to step S91 described later. On the other hand, if the “VPN setting” button has not been pressed, the terminal control unit 17 checks whether or not the “End” button has been pressed (step S85 in FIG. 6). If “end” is pressed (Yes in step S85), processing related to the end of the wireless setting menu is executed (step S87), and the process proceeds to step S91. The process related to the menu end is a process such as returning the screen of the display 19 to normal contents. If “end” is not pressed (No in step S85), the routine proceeds to step S91.

  The process when the “Bluetooth setting” button 43 is pressed (Yes in step S21 in FIG. 4) will be described below. In this case, the terminal control unit 17 causes the display 19 to display the contents as shown in “Display 2” in FIG. 2 (Step S23). Then, it is checked whether or not the “Bluetooth OFF” button has been pressed (step S25). “Display 2” is an example when Bluetooth is ON, but when Bluetooth is OFF, it is checked in step S25 whether or not the “Bluetooth ON” button has been pressed. When the button is pressed (Yes in step S25), the current state of the Bluetooth communication function is reversed (step S27). In other words, it is OFF when the current state is ON, and ON when it is OFF.

  On the other hand, if the button is not pressed in step S25, the routine proceeds to step S29. Therefore, the terminal control unit 17 checks whether or not the “Bluetooth device detection” button 45 has been pressed (step S29). If not (No in step S29), the routine returns to step S23 and monitors whether the “display 2” button is pressed. On the other hand, when the “Bluetooth device detection” button 45 is pressed in Step S29 (Yes in Step S29), the terminal control unit 17 displays the contents as shown in FIG. A Bluetooth device detection procedure is executed (step S31).

  If a Bluetooth device is detected, the process from step S33 is executed. If not detected, it is checked whether a time-out has occurred (step S41). If not timed out (No in step S41), the routine returns to step S33 and continues detection. When the time-out occurs (Yes in step S41), the terminal control unit 17 causes the display 19 to display a message indicating that a time-out has occurred without detecting the Bluetooth device. Thereafter, the routine proceeds to step S45.

On the other hand, when the Bluetooth device is detected in the step S33 (Yes in step S33), the terminal control unit 17 displays the contents as shown in “display 4” in FIG. 2 on the display 19 (step S35). Further, device-specific information (identification information) provided by the device is acquired from the detected device, and it is confirmed whether or not it matches the identification information registered in the memory 16 (step S37). If the two match (Yes in step S37), the wireless LAN connection permission flag secured on the memory 16 is set (step S39). This flag is a flag for holding presence / absence of communication establishment with the Bluetooth compatible device 31 related to the identification information. That is, it is a flag that holds the state of wireless LAN connection availability. The terminal control unit 17 compares the flag with the current state to determine whether or not the connection state with the Bluetooth compatible device 31 has changed.
Thereafter, the routine proceeds to step S45. The terminal control unit 17 waits for an operation indicating that a display indicating that a device has been detected (see step S35) or a timeout message (see step S43) has been confirmed (step S45), and then advances the routine to step S91. The above is the processing when the “Bluetooth setting” button 43 is pressed.

  Next, a process when the “wireless LAN setting” button 41 is pressed (Yes in step S51) will be described. When the “wireless LAN setting” button 41 is pressed, the terminal control unit 17 causes the display 19 to display the contents shown in FIG. 2 “display 5” (step S53). Then, it is checked whether or not the “turn off wireless LAN” button has been pressed (step S55). “Display 5” is an example when the wireless LAN is ON, but when the wireless LAN is OFF, it is checked in step S55 whether or not the “turn on wireless LAN” button has been pressed. When the button is pressed (Yes in step S55), the current state of the wireless LAN communication function is reversed (step S57). In other words, it is OFF when the current state is ON, and ON when it is OFF.

  On the other hand, if the button is not pressed in step S55, the routine proceeds to step S59. Therefore, the terminal control unit 17 checks whether or not the wireless LAN connection permission flag is set (step S59). This flag is set when communication is established with the Bluetooth-compatible device 31 related to the identification information stored in the memory 16 in step 39 described above. If the flag is set (Yes in step S59), the terminal control unit 17 determines that connection to the wireless LAN is possible, and further checks whether the “network detection” button 47 has been pressed (step S63). ). If the button has not been pressed (No in step S63), the routine returns to step S53 and monitors whether the “display 5” button has been pressed. On the other hand, when the “network detection” button 47 is pressed in step S63 (Yes in step S63), the terminal control unit 17 displays the contents as shown in “display 6” in FIG. Network detection via the LAN is executed (step S65).

  Then, the terminal control unit 17 monitors whether or not an access point has been detected (step S67), and when detected (Yes in step S67), a screen as shown in FIG. (Step S69). Thereafter, the routine proceeds to step S75 described later. When an access point is not detected in step S67 (No in step S67), the terminal control unit 17 further checks whether or not a timeout has occurred (step S71). If not timed out (No in step S71), the routine returns to step S67 to continue monitoring. When the time-out occurs (Yes in step S71), a message indicating that the time-out has occurred without the network being detected is displayed on the display 19 (step S73), and the routine proceeds to step S75.

The description returns, but if the wireless LAN connection permission flag is not set in step S59 (No in step S59), the terminal control unit 17 displays a screen as shown in FIG. It is displayed (step S61). Thereafter, the routine proceeds to step S75. The flag is set when communication with the Bluetooth compatible device 31 is established, and is reset in step S95 described later when the flag is disconnected. Therefore, in the state where the communication with the Bluetooth compatible device 31 is disconnected, the process of connecting to the wireless LAN is not started.
In step S75, the terminal control unit 17 waits for an operation indicating that an indication that an access point has been detected (see step S69) or a timeout message (see step S73) has been confirmed (step S75), and then executes the routine. Proceed to step S91. The above is the processing when the “wireless LAN setting” button 41 is pressed.

Subsequently, processing after step S91 in FIG. 6 will be described. Here, the terminal control unit 17 monitors whether or not the communication with the Bluetooth compatible device 31 is disconnected, and performs processing when the communication is disconnected.
In step S91, the terminal control unit 17 checks whether or not a wireless LAN connection permission flag is set. As will be described later, this flag is set when the connection with the Bluetooth compatible device 31 related to the identification information is established in step S39 of FIG. 4, and the detection when the connection with the Bluetooth compatible device 31 changes, that is, the connection Is used to detect that is disconnected. If the flag is not set, the routine returns to step S13 to display the screen of “Display 1” in FIG.

  On the other hand, when the connection with the Bluetooth-compatible device 31 has been established just before and the wireless LAN connection permission flag is set (Yes in step S91), the terminal control unit 17 uses the recognition information stored in the memory 16 as the recognition information. It is checked whether or not the connection with the Bluetooth compatible device 31 is maintained (step S93). That is, the latest state is confirmed. If the connection with the Bluetooth compatible device 31 is maintained, the routine returns to step S13 to display the screen of “Display 1” in FIG.

On the other hand, if it is determined that the connection with the Bluetooth compatible device 31 is not maintained (No in step S93), the terminal control unit 17 resets the wireless LAN connection permission flag to match the current state (step S95). ). Further, the terminal control unit 17 checks whether or not it is connected to the wireless LAN (step S97). If not connected to the wireless LAN, the routine returns to step S13. If connected to the wireless LAN (Yes in step S97), the connection to the wireless LAN is disconnected. Then, the fact that the wireless LAN has been disconnected is displayed on the display 19 to notify the user (step S99). Then, the routine returns to step S13.
The following can be said from the above configuration. When the communication function of the Bluetooth-compatible device 31 is stopped, the communication terminal 11 is forcibly disconnected from the wireless LAN. Therefore, the network administrator manages whether to allow or prohibit connection to the wireless communication network in a specific conference room or classroom by turning on / off the communication function of the Bluetooth-compatible device 31. Can do.

  In addition to the embodiments described above, there can be various modifications of the present invention. These modifications should not be construed as not belonging to the scope of the present invention. The present invention should include the meaning equivalent to the scope of the claims and all modifications within the scope.

11: Communication terminal 13: Wireless LAN interface 15: Bluetooth interface 16: Memory 17: Terminal control unit 18: Touch panel 19: Display 21: Wireless LAN base unit 23: Base unit wireless LAN interface 25: Base unit control unit 31: Bluetooth compatible Device 33: Device Bluetooth interface 35: Device control unit 41: “Wireless LAN setting” button 43: “Bluetooth setting” button 45: “Bluetooth device detection” button 47: “Network detection” button

Claims (5)

A wireless LAN communication unit that communicates by connecting to a wireless LAN communication network;
A short-range wireless communication unit that establishes communication with the device by identifying a device in the communication range by a short-range wireless communication method having a communication range narrower than the wireless LAN communication;
A communication control unit for controlling communication by the wireless LAN communication unit and the short-range wireless communication unit;
A storage unit that stores in advance identification information of a device to be identified by the short-range wireless communication unit,
The communication control unit permits connection to the wireless LAN communication network when communication via the short-range wireless communication unit is established with the device specified by the identification information, and the device A communication terminal device that prohibits connection to the wireless LAN communication network when no communication is established.   The communication terminal apparatus according to claim 1, wherein the communication control unit disconnects the connection to the wireless LAN communication network when communication with a device specified by the identification information is disconnected.   The communication terminal apparatus according to claim 1, wherein the short-range wireless communication system is a Bluetooth standard communication system. The short-range wireless communication unit receives information necessary for connection to a wireless LAN communication network from a device specified by the identification information,
The communication terminal apparatus according to claim 1, wherein the communication control unit performs connection to a wireless LAN communication network using the received information. Computer
Establishing communication with a device in the communication range using a short-range wireless communication unit that performs short-range wireless communication in a communication range narrower than wireless LAN communication that performs communication by connecting to a wireless LAN communication network,
Access the storage unit that stores in advance the identification information of the device to be identified by the short-range wireless communication,
When communication via the short-range wireless communication unit is established with the device specified by the identification information, connection to the wireless LAN communication network by the wireless LAN communication is permitted, and A communication method characterized by prohibiting connection to the wireless LAN communication network when communication is not established.