JP2014060672A - Radio communication device and radio communication method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a radio communication device and a radio communication method, capable of confirming that a regular radio terminal is connected.SOLUTION: The radio communication device includes a radio unit for communicating with a radio terminal by radio, and a storage unit for storing identification information enabling uniquely identifying the radio terminal. The radio communication device also includes a control unit, and upon detecting that the identification information is included in a communication signal from the radio terminal, the control unit outputs the display of terminal name information of the radio terminal.

Description

  The present invention relates to a wireless communication apparatus and a wireless communication method that function as an access point of a wireless local area network (LAN).

  With the spread of wireless LAN, so-called wireless LAN access points, which are devices for connecting wireless terminals to a wired network, have come to be used not only in companies and towns but also at home. ing.

  Wireless LAN access points installed in towns and the like are designed to connect wireless terminals of an unspecified number of users, so few wireless terminals connected to wireless LAN access points have special restrictions. . However, it is desirable that a wireless LAN access point in a company or a home is configured so that only a legitimate user's wireless terminal can be used.

  In order to respond to such a request, there has been proposed that wireless communication devices such as wireless LAN access points are connected only to regular wireless terminals (see, for example, Patent Document 1).

  The following description is made in Patent Document 1 “Wireless Communication Device” described above.

  That is, the wireless communication apparatus is provided with a table for registering MAC (Media Access Control) addresses of wireless terminals based on predetermined conditions. Here, as an example, the wireless terminal based on a predetermined condition refers to a wireless terminal that has failed to authenticate connection to the wireless communication apparatus. As another example, when a wireless communication device has caused an abnormal operation due to a packet transmitted by a wireless terminal, the wireless terminal is determined to be a wireless terminal based on a predetermined condition. When a packet is received from a wireless terminal having a MAC address registered in the table, the wireless communication apparatus discards the packet and rejects the connection with the wireless terminal that transmitted the packet.

  As a result, it is possible to provide a wireless communication apparatus that does not connect from a wireless terminal that should not receive a wireless service, and therefore it is possible to provide a wireless communication apparatus that can stabilize the service for a wireless terminal that should receive a wireless service. It is going to become.

Japanese Patent Laying-Open No. 2006-074680 (pages 6 to 13, FIGS. 1 to 10)

  In the technique described in Patent Document 1 described above, the MAC address of a wireless terminal that should not be connected to the wireless communication apparatus is registered. In other words, when an unauthorized wireless terminal tries to connect to the wireless communication device, it can be determined that the wireless terminal is not an authorized wireless terminal. However, there is a problem that it is not possible to determine whether a regular wireless terminal of the wireless communication apparatus is connected.

  The present invention has been made to solve the above-described problems. Therefore, an object of the present invention is to provide a wireless communication apparatus and a wireless communication method capable of confirming that a regular wireless terminal is connected.

  The wireless communication apparatus of the present invention includes a wireless unit that communicates with a wireless terminal wirelessly and a storage unit that stores identification information that can uniquely identify the wireless terminal. The wireless communication apparatus includes a control unit that displays and outputs terminal name information of the wireless terminal when detecting that the identification information is included in a communication signal from the wireless terminal.

  The wireless communication method of the present invention displays terminal name information of the wireless terminal when it is detected that identification information capable of uniquely identifying the wireless terminal is included in a communication signal from the wireless terminal. It has become.

  According to the wireless communication apparatus of the present invention, it is possible to confirm that an authorized wireless terminal is connected.

1 is a block diagram showing a first embodiment of a wireless communication apparatus of the present invention. It is a figure which shows an example of a terminal information table. It is a flowchart explaining operation | movement of 1st Embodiment. It is a block diagram which shows 2nd Embodiment of the radio | wireless communication apparatus of this invention. It is a figure which shows the 2nd example of a terminal information table. It is a figure which shows an example of a display part. It is a flowchart explaining operation | movement of 2nd Embodiment. It is a block diagram which shows 3rd Embodiment of the radio | wireless communication apparatus of this invention. It is a figure which shows an example of a radio wave range change condition table. It is a flowchart explaining operation | movement of 3rd Embodiment.

Next, embodiments of the present invention will be described with reference to the drawings.
[First embodiment]
FIG. 1 is a block diagram showing a first embodiment of a wireless communication apparatus of the present invention.

  The wireless communication device 100 illustrated in FIG. 1 can perform wireless communication with the wireless terminal 200.

  Here, the wireless communication device 100 is a so-called wireless LAN access point for a terminal device that communicates with a wireless LAN to connect to an existing wired network or another terminal device. Other examples of the wireless communication device 100 include a wireless LAN router having an access point built in a router, and a mobile router that is a small broadband router having an access point built in. be able to.

  The wireless terminal 200 is a terminal device that can be connected to another terminal device or the like via the wireless communication device 100 via a wireless LAN. Specific examples of the wireless terminal 200 include a mobile phone having a wireless LAN communication function, a PHS (Personal Handyphone System) terminal, a PDA (Personal Digital Assistance: portable information terminal), a notebook personal computer, and the like. Can be mentioned. Another example of the wireless terminal 200 is a terminal device connected to a data communication terminal for performing data communication.

  A wireless communication device 100 illustrated in FIG. 1 includes a control unit 20, a wireless unit 10 connected to the control unit 20, and a storage unit 30.

  The wireless unit 10 performs wireless communication with the wireless terminal 200 using a wireless LAN. The wireless unit 10 transmits the data received from the control unit 20 to the outside over radio waves of the wireless LAN, and sends the data received from the outside such as the wireless terminal 200 to the control unit 20.

  The storage unit 30 stores data and the like necessary for the wireless communication device 100 to operate. In particular, in the present embodiment, the storage unit 30 stores a terminal information table that describes identification information that can uniquely identify the wireless terminal 200. The terminal information table will be described later with reference to FIG.

  The control unit 20 performs operation control of the entire wireless communication device 100. Particularly in the present embodiment, the control unit 20 analyzes the radio signal received from the radio terminal 200 and detects whether the radio signal includes the identification information described in the terminal information table. It works like this. And when identification information is contained in a radio signal, the terminal name of the said radio | wireless terminal 200 is output to the display part which is not shown in figure.

  Note that the wireless communication apparatus 100 includes a wired interface unit for connecting to a wired network or the like, but in the present embodiment, illustration is omitted for simplification of the drawing.

  Next, the terminal information table described above will be described with reference to FIG.

  FIG. 2 is a diagram illustrating an example of the terminal information table.

  In FIG. 2, the terminal information table 35 indicates that the table is stored in the storage unit 30. As shown in line 35-10, the terminal information table 35 includes a column of terminal names 35-1 indicating the names of the wireless terminals 200, and a MAC address 35- serving as identification information that can uniquely identify the wireless terminals 200. It has two rows. In the column of the terminal name 35-1, the name or nickname of the user of the wireless terminal 200, the user's favorite name, or the like is described. In the column of the MAC address 35-2, a MAC address as a physical address uniquely assigned to the wireless terminal 200 is described.

  As an example in FIG. 2, as illustrated in lines 35-11, the wireless terminal 200 with the terminal name “AAA” has “AA: XX: XX: XX: XX: XX” as the MAC address. Also, as shown in lines 35-12, the wireless terminal 200 with the terminal name “BBB” has “BB: XX: XX: XX: XX: XX” as the MAC address. Similarly, in the terminal information table 35, terminal names (35-1 column) and MAC addresses (35-2 column) of a plurality of wireless terminals 200 can be stored.

  In the present embodiment, the regular wireless terminal 200 of the wireless communication apparatus 100 is registered and stored in the terminal information table 35. Here, the regular wireless terminal 200 refers to a terminal device that is permitted to connect to the wireless communication device 100. In the present embodiment, it is assumed that the contents are registered in advance in the terminal information table 35 using some means.

  Next, the operation of the present embodiment will be described with reference to FIG.

  FIG. 3 is a flowchart for explaining the operation of the first embodiment. 3 shows the operation of the control unit 20 of the wireless communication apparatus 100.

  In FIG. 3, the wireless communication device 100 and the wireless terminal 200 start communication by wireless LAN (step S1 in FIG. 3).

  Then, the control unit 20 of the wireless communication apparatus 100 analyzes the wireless signal received from the wireless terminal 200 via the wireless unit 10, and extracts the MAC address of the wireless terminal 200 as identification information (step S2). As is well known, a radio signal transmitted / received by wireless LAN communication is transmitted / received in the form of a wireless LAN frame. In the wireless LAN frame transmitted from the wireless terminal 200, the MAC address of the wireless terminal 200 is described as the transmission source MAC address. Therefore, the control unit 20 can extract the MAC address of the wireless terminal 200 from the wireless LAN frame.

  And the control part 20 determines whether the MAC address extracted as identification information is registered in the terminal information table 35 (step S3).

  When the MAC address as the identification information is registered in the terminal information table 35 (Yes in step S3), the control unit 20 acquires the terminal name corresponding to the MAC address from the terminal information table 35 (step S4). And the control part 20 outputs the acquired terminal name to the display part which is not illustrated in FIG. 1 as terminal name information (step S5).

  On the other hand, when the MAC address as the identification information is not registered in the terminal information table 35 (No in step S3), the control unit 20 causes the wireless terminal 200 not registered in the terminal information table 35 to be registered in the wireless communication device 100. Recognize that you are trying to connect. And the control part 20 outputs that the unregistered radio | wireless terminal 200 which is not registered into the terminal information table 35 is going to connect to the radio | wireless communication apparatus 100 to a display part (step S6).

  After the operation of step S5 or step S6, the control unit 20 operates to return to step S2.

  The operation of the first embodiment of the present invention has been described above.

  As described above, the wireless communication device (wireless communication device 100) of this embodiment can uniquely identify the wireless unit (wireless unit 10) that communicates wirelessly with the wireless terminal (wireless terminal 200) and the wireless terminal. A storage unit (storage unit 30) for storing various identification information. In addition, when the wireless communication device detects that the identification information is included in a communication signal from the wireless terminal, the wireless communication device includes a control unit (control unit 20) that displays and outputs terminal name information of the wireless terminal. I have.

Therefore, according to the wireless communication apparatus of the present embodiment, it can be confirmed that an authorized wireless terminal is connected.
[Second Embodiment]
Next, a second embodiment according to the present invention will be described as a modification of the first embodiment shown in FIG.

  FIG. 4 is a block diagram showing a second embodiment of the wireless communication apparatus of the present invention. 4 is obtained by adding a display unit and an interface (I / F) unit to the wireless communication apparatus 100 shown in FIG. Therefore, in FIG. 4, the same reference numerals or symbols are assigned to the components corresponding to those in FIG. 1, and the description thereof is omitted as much as possible.

  The wireless communication device 100-2 illustrated in FIG. 4 can perform wireless communication with the wireless terminal 200. In addition, the wireless communication device 100-2 can be connected to the terminal device 300 by wired communication.

  Here, the wireless communication device 100-2 is a wireless LAN access point similar to that of the first embodiment, a wireless LAN router, a mobile router, or the like.

  The wireless terminal 200 is a terminal device that can be connected to another terminal device or the like via the wireless communication device 100-2 via a wireless LAN, as in the first embodiment.

  The terminal device 300 is a device that can register various setting data and the like with the wireless communication device 100-2. Specific examples of the terminal device 300 include a desktop personal computer and a notebook personal computer.

  4 includes a control unit 20-2, a wireless unit 10 connected to the control unit 20-2, a storage unit 30-2, a display unit 40, and an I / F unit 50. ing.

  Since the radio unit 10 is the same as that of the first embodiment, the description thereof is omitted.

  Similar to the first embodiment, the storage unit 30-2 stores data and the like necessary for the operation of the wireless communication device 100-2. Further, the terminal information table is stored as in the first embodiment, but the format of the terminal information table is slightly different from that in the first embodiment. Therefore, the terminal information table in the present embodiment will be described later with reference to FIG.

  The display unit 40 displays display data and the like output from the control unit 20-2. In the present embodiment, the display unit 40 displays the terminal name and the like of the wireless terminal 200 that is communicatively connected to the wireless communication apparatus 100-2. The details of the display unit 40 will be described later with reference to FIG.

  The I / F unit 50 is an interface for communication connection with the terminal device 300. The I / F unit 50 is configured by a connector that can be connected to a wired LAN, for example. As another example, the I / F unit 50 may be a connector that can be connected with a USB (Universal Serial Bus) communication standard.

  The control unit 20-2 performs operation control of the entire wireless communication device 100-2. Similarly to the first embodiment, the control unit 20-2 analyzes the radio signal received from the radio terminal 200, and the identification information described in the terminal information table is included in the radio signal. It works to detect whether In the present embodiment, when the identification information is included in the wireless signal, the control unit 20-2 indicates that the wireless terminal 200 is connected to the wireless communication device 100-2. Display is performed by turning on the LED of the display unit.

  Note that the wireless communication apparatus 100-2 includes a wired interface unit for connecting to a wired network or the like, as in the first embodiment. However, in the present embodiment, the wireless communication apparatus 100-2 is illustrated for simplicity of the drawing. Shall be omitted.

  Next, the terminal information table described above will be described with reference to FIG.

  FIG. 5 is a diagram illustrating a second example of the terminal information table.

  In FIG. 5, the terminal information table 352 of the present embodiment indicates that the table is stored in the storage unit 30-2. The terminal information table 352 can uniquely identify the wireless terminal 200 and the column of the terminal name 352-1 indicating the name of the wireless terminal 200, as in the first embodiment, as shown in lines 352-10. A column of MAC addresses 352-2 as unique identification information. Since the contents described in the column of the terminal name 352-1 and the column of the MAC address 352-2 are the same as those in the first embodiment, further explanation is omitted.

  In addition, the terminal information table 352 includes, as items added in the present embodiment, a terminal unique ID (Identification) 352 that indicates a unique identification number that the wireless terminal 200 has, as shown in line 352-10. It has 3 rows. In addition, the terminal information table 352 includes a column of LED (Light Emitting Diode) names 352-4.

  In the field of terminal unique ID 352-3, when the wireless terminal 200 has a unique identification number, the unique identification number is described. Here, the unique identification number refers to a number that can uniquely identify the wireless terminal 200, and the wireless terminal 200 stores the unique identification number. The unique identification number is used together with the MAC address of the wireless terminal 200 to be used for identifying the wireless terminal 200. Alternatively, the wireless terminal 200 may be identified using only the unique identification number. When using the unique identification number for identifying the wireless terminal 200, the unique identification number may be described in the wireless LAN frame transmitted by the wireless terminal 200. By doing so, the control unit 20-2 of the wireless communication apparatus 100-2 can extract the unique identification number from the wireless LAN frame transmitted by the wireless terminal 200.

  In the column of LED name 352-4, the name of the LED to be turned on when the wireless terminal 200 having the terminal name 352-1 is connected to the wireless communication apparatus 100-2 is described. In addition, this LED is provided in the display part 40, and when the radio | wireless terminal 200 is communication-connected to the radio | wireless communication apparatus 100-2, it is comprised so that it may light. Details of the display unit 40 will be described later with reference to FIG.

  Here, an example of contents registered in the terminal information table 352 illustrated in FIG. 5 will be described.

  In line 352-11 in FIG. 5, the wireless terminal 200 with the terminal name “AAA” has “AA: XX: XX: XX: XX: XX” as the MAC address, and “112233445566” as the terminal unique ID. The LED name is “LED-a”. In line 352-12, the wireless terminal 200 having the terminal name “BBB” has “BB: XX: XX: XX: XX: XX” as the MAC address and “223344556677” as the terminal unique ID. And the LED name is “LED-b”. Similarly, the terminal information table 352 includes a terminal name (352-1 column), a MAC address (352-2 column), a terminal unique ID (352-3 column), an LED name (352-) of the plurality of wireless terminals 200. 4 columns) can be stored.

  Also in this embodiment, as in the first embodiment, the regular wireless terminal 200 of the wireless communication device 100-2 is registered and stored in the terminal information table 352.

  Next, the details of the display unit 40 will be described with reference to FIG.

  FIG. 6 is a diagram illustrating an example of the display unit. As in the first embodiment, the display unit in the present embodiment displays the terminal name of the wireless terminal 200 that is communicatively connected to the wireless communication device 100-2, but the display format is limited. It has become.

  Referring to FIG. 6, the display unit 40 of the present embodiment is provided with an area X40-10 describing the terminal name of the wireless terminal 200 and an LED indicating whether or not the wireless terminal 200 is in communication connection. It is roughly divided into a region Y40-11. The LED in the area Y40-11 is turned on when the wireless terminal 200 is connected for communication (indicated by ■ in FIG. 6), and is turned off when not connected for communication (in FIG. 6). , □).

  Specifically, as shown in line 40-1 in FIG. 6, the wireless terminal 200 whose terminal name is “AAA” is currently connected to the wireless communication apparatus 100-2 (line 40-1). LED (LED-a) lights up). In addition, the wireless terminal 200 whose terminal name is “BBB” is not currently connected to the wireless communication apparatus 100-2 (the LED (LED-b) in line 40-2 is off). Similarly, lines 40-3 to 40-5 indicate whether or not the wireless terminal 200 is connected for communication. Note that the wireless terminals 200 shown in the lines 40-1 to 40-5 are all terminal devices registered in the terminal information table 352.

  In this embodiment, as shown in line 40-6 in FIG. 6, a wireless terminal 200 that is not registered in the terminal information table 352 (described as “unregistered terminal”) communicates with the communication terminal. Whether or not it is doing. Further, as shown in line 40-7, whether or not the wireless communication device 100-2 is performing wireless LAN communication is also displayed on the display unit 40.

  Next, the operation of the second embodiment will be described.

  FIG. 7 is a flowchart for explaining the operation of the second embodiment. As a premise of the operation described in FIG. 7, it is assumed that the contents of the terminal information table 352 in the storage unit 30-2 are set and registered in advance from the terminal device 300 illustrated in FIG.

  In FIG. 7, the wireless communication device 100-2 and the wireless terminal 200 start communication by wireless LAN (step S21 in FIG. 7).

  Then, the control unit 20-2 of the wireless communication device 100-2 analyzes the wireless signal received from the wireless terminal 200 via the wireless unit 10, and extracts the MAC address of the wireless terminal 200 as identification information (step S22). ). As identification information of the wireless terminal 200, a terminal unique ID (unique identification number) of the wireless terminal 200 may be extracted in addition to the MAC address or instead of the MAC address.

  Then, the control unit 20-2 determines whether the MAC address extracted as the identification information and / or the terminal unique ID is registered in the terminal information table 352 (step S23).

  When the identification information (MAC address and / or terminal unique ID) is registered in the terminal information table 352 (Yes in step S23), the control unit 20-2 selects a terminal corresponding to the identification information from the terminal information table 352. A name is acquired (step S24). At the same time, the control unit 20-2 also acquires the LED name corresponding to the identification information from the terminal information table 352. And the control part 20-2 sends out the signal for lighting LED of the LED name corresponding to a terminal name to the display part 40 (step S25). Then, on the display unit 40, the LED corresponding to the terminal name is turned on (step S26). For example, if the terminal name is “AAA”, the LED (LED-a) in the 40-1 row in FIG. 6 is turned on, and the LEDs in the 40-7 row are also turned on at the same time.

  On the other hand, when the identification information (MAC address and / or terminal unique ID) is not registered in the terminal information table 352 (No in step S23), the control unit 20-2 is a wireless that is not registered in the terminal information table 352. The terminal 200 recognizes that it is trying to connect to the wireless communication device 100-2. And the control part 20-2 sends out the signal for lighting LED corresponding to the unregistered radio | wireless terminal 200 which is not registered into the terminal information table 352 to the display part 40 (step S27). Then, on the display unit 40, the LED corresponding to the unregistered terminal is turned on (step S28). That is, the LED of “unregistered terminal” in line 40-6 in FIG. 6 is lit, and the LED in line 40-7 is also lit simultaneously.

  After step S26 or step S28, the control unit 20-2 operates to return to step S22.

  The operation of the second embodiment of the present invention has been described above.

  As described above, the control unit (control unit 20-2) of the wireless communication device (wireless communication device 100-2) of the present embodiment includes identification information (MAC) in the communication signal from the wireless terminal (wireless terminal 200). When it is detected that the address and / or terminal unique ID) is included, the LED corresponding to the terminal name information of the wireless terminal is turned on. In addition, when the control unit detects that the identification information is not included in a communication signal from the wireless terminal, the control unit displays an LED indicating the wireless terminal that is not stored in the storage unit (storage unit 30-2). Operates to light up.

Therefore, according to the wireless communication apparatus of the present embodiment, it is possible to confirm that a regular wireless terminal is connected or an unauthorized wireless terminal is connected. In addition, since the display is based on the LED, it can be easily confirmed that the wireless terminal connected to the wireless communication device is authorized / unauthorized.
[Third embodiment]
Next, a third embodiment according to the present invention will be described as a modification of the first embodiment shown in FIG. 1 or the second embodiment shown in FIG.

  FIG. 8 is a block diagram showing a third embodiment of the wireless communication apparatus of the present invention. FIG. 8 is a diagram in which the wireless LAN radio wave reachable range by the wireless unit 10 of the wireless communication apparatus 100 of FIG. 1 or the wireless communication apparatus 100-2 of FIG. 4 can be changed. Therefore, in FIG. 8, the same reference numerals or symbols are assigned to the components corresponding to those in FIG. 1 or FIG. 4, and the description thereof is omitted as much as possible.

  The wireless communication device 100-3 illustrated in FIG. 8 can perform wireless communication with the wireless terminal 200.

  Here, the wireless communication device 100-3 is a wireless LAN access point similar to the first or second embodiment, a wireless LAN router, a mobile router, or the like.

  The wireless terminal 200 is a terminal device that can be connected to another terminal device or the like via the wireless communication device 100-3 via a wireless LAN, as in the first or second embodiment.

  A wireless communication device 100-3 illustrated in FIG. 8 includes a control unit 20-3, a wireless unit 10-3 connected to the control unit 20-3, and a storage unit 30-3.

  Similarly to the first or second embodiment, the wireless unit 10-3 performs wireless communication with the wireless terminal 200 using a wireless LAN.

  Similar to the first or second embodiment, the storage unit 30-3 stores data and the like necessary for the operation of the wireless communication apparatus 100-3, and stores a terminal information table. Furthermore, the storage unit 30-3 stores a radio wave range change condition table used for changing the reach of the wireless LAN radio wave by the radio unit 10-3. The radio wave range changing condition table will be described later with reference to FIG.

  The control unit 20-3 performs operation control of the entire wireless communication device 100-3. Similarly to the first or second embodiment, the control unit 20-3 analyzes the radio signal received from the radio terminal 200, and the identification information described in the terminal information table is included in the radio signal. Operates to detect if it is included. And the control part 20-3 displays the terminal name of the said radio | wireless terminal 200 on a display part, when identification information is contained in the radio signal. Alternatively, when the identification information is included in the wireless signal, the control unit 20-3 indicates that the wireless terminal 200 is in communication connection with the wireless communication device 100-2 by using an LED on the display unit. Display by lighting up. In particular, in the present embodiment, the control unit 20-3 operates to change the wireless LAN radio wave reachable range by the wireless unit 10-3 when a certain condition is satisfied.

  Returning to the description of the radio unit 10-3, the radio unit 10-3 includes the control circuit unit 11, the transmission circuit unit 12 and the reception circuit unit 13 connected to the control circuit unit 11, and the transmission circuit unit 12 and the reception circuit unit 13. And a transmission / reception switching circuit unit 14 connected to each other.

  The control circuit unit 11 sends the data received from the control unit 20-3 to the transmission circuit unit 12, receives the data sent from the reception circuit unit 13, and sends it to the control unit 20-3. In the present embodiment, in particular, the control circuit unit 11 changes the transmission signal level of the transmission circuit unit 12 and the received signal of the reception circuit unit 13 based on the instruction signal for changing the radio wave range from the control unit 20-3. Change the level.

  The transmission circuit unit 12 receives the data transmitted from the control circuit unit 11 and transmits it to the transmission / reception switching circuit unit 14. The transmission circuit unit 12 changes the transmission signal level based on the transmission signal level change instruction from the control circuit unit 11. In the present embodiment, the change of the transmission signal level refers to the change of the transmitted radio wave intensity.

  The receiving circuit unit 13 receives the data sent from the transmission / reception switching circuit unit 14 and sends it to the control circuit unit 11. The receiving circuit unit 13 changes the received signal level based on the received signal level change instruction from the control circuit unit 11. In the present embodiment, the change of the received signal level refers to the change (amplification or attenuation) of the received radio wave signal.

  The transmission / reception switching circuit unit 14 transmits the data transmitted from the transmission circuit unit 12 to the outside via the antenna, and transmits the data received from the outside via the antenna to the reception circuit unit 13.

  Note that the wireless communication apparatus 100-3 includes a wired interface unit for connecting to a wired network or the like, as in the first or second embodiment, but in this embodiment, for simplification of the drawing. The illustration is omitted. The wireless communication device 100-3 may include the display unit 40 and the I / F unit 50 similar to those in the second embodiment. However, in this embodiment, for simplification of the drawing, The illustration is omitted.

  Next, the above-described radio wave range changing condition table will be described with reference to FIG.

  FIG. 9 is a diagram illustrating an example of the radio wave range changing condition table. In the present embodiment, the reach of the wireless LAN radio wave by the wireless unit 10-3 of the wireless communication apparatus 100-3 is changed when certain conditions are met. The radio wave range changing condition table is a table that describes the correspondence between the reach of wireless LAN radio waves and the conditions for changing the reach.

  In FIG. 9, the radio wave range changing condition table 37 includes a column of the radio wave range 37-1, a column of the radio wave intensity 37-2, a column of the change condition α37-3, and a change condition β37-4, as shown in line 37-10. Column, a column of change condition γ37-5, and the like.

  The field of the radio wave range 37-1 describes the reachable range of the wireless LAN radio wave transmitted by the wireless communication device 100-3. Further, in the field of the radio wave intensity 37-2, the intensity of the radio wave radiated from the antenna of the wireless communication device 100-3 is expressed in decibels in order to realize the reach described in the field of the radio wave range 37-1. Described as a unit.

  As an example in FIG. 9, as shown in line 37-11, in order to realize “5 m” as the radio wave range 37-1, the radio wave intensity 37-2 may be “3 dBm”. Further, line 37-12 indicates that the radio wave intensity 37-2 may be “10 dBm” in order to realize “30 m” as the radio wave range 37-1.

  In the column of the change condition α37-3, conditions for changing to the reach range described in the field of the radio wave range 37-1 are described. Here, any condition may be described as a condition for changing, but in the change condition α37-3, “number of connected terminals” is described as a condition. In line 37-11, “5 or less” is set, and when the number of wireless terminals 200 connected to the wireless communication apparatus 100-3 becomes “5 or less”, the radio wave range is 5 m (37-11). Line, column 37-1).

  Furthermore, the second condition for changing to the reach range described in the field of the radio wave range 37-1 is described in the column of the change condition β37-4. Here, as a condition for changing, any condition may be described, but in the change condition β37-4, “time zone” is described as a condition. Line 37-11 indicates “nighttime”, and indicates that the radio wave range is changed to 5 m (line 37-11, column 37-1) when the time zone becomes “nighttime”.

  Similarly, in the column after the change condition γ37-5, the third, fourth,... Conditions for changing to the reach range described in the field of the radio wave range 37-1 are described.

  Note that the column of the change condition α37-3, the column of the change condition β37-4, the column of the change condition γ37-5, and the like may be handled as independent conditions. For example, only the change condition β37-4 may be handled as a condition for changing to the reach range described in the field of the radio wave range 37-1. In this case, it is assumed that which change condition is used is previously set in the control unit 20-3.

  Alternatively, some of the change condition α37-3 column, the change condition β37-4 column, the change condition γ37-5 column, etc. are combined with a combination condition (AND condition or OR (OR). ) Condition). For example, the change condition α37-3 and the change condition β37-4 may be combined under the OR condition and handled as a condition for changing to the reach range described in the field of the radio wave range 37-1. In this way, when either the change condition α37-3 or the change condition β37-4 is satisfied, the range is changed to the reach range described in the column of the radio wave range 37-1. Also in this case, it is assumed that which change condition is used in combination in the control unit 20-3 in advance.

  Next, the operation of the third embodiment will be described.

  FIG. 10 is a flowchart for explaining the operation of the third embodiment. Note that the operations described in FIG. 10 are only described for operations specific to the present embodiment. Therefore, the description of the operation described in the first or second embodiment is omitted. Further, as a premise for explaining the operation of FIG. 10, the control unit 20-3 has a change condition α37-3 column (connection terminal) of the radio wave range change condition table 37 as a condition for changing the reach of the wireless LAN radio wave. Number).

  In FIG. 10, the wireless communication device 100-3 and the wireless terminal 200 start communication by wireless LAN (step S31 in FIG. 10).

  Then, the control unit 20-3 of the wireless communication device 100-3 determines whether or not the change condition described in the radio wave range change condition table 37 is satisfied (step S32). As a specific example, as described in the column of the change condition α37-3, the number of wireless terminals 200 connected to the wireless communication device 100-3 is, for example, “5 or less” (line 37-11, 37-3 column).

  When the change condition is not satisfied (No in Step S32), the control unit 20-3 operates to return to Step S32.

  When the change condition is satisfied (Yes in step S32), the control unit 20-3 acquires the radio wave intensity (the radio wave intensity 37-2 column) from the radio wave range change condition table 37 (step S33). As a specific example, since the change condition α37-3 column 37-11 row (5 or less) in the radio wave range change condition table 37 is satisfied, the radio wave intensity (37-2 column, 37-11 row) “ 3 dBm ". Then, the control unit 20-3 sends an instruction signal for changing the radio wave range to the control circuit unit 11 of the radio unit 10-3 with the radio wave intensity attached (step S34). Then, the control circuit unit 11 sends a transmission signal level change instruction to the transmission circuit unit 12. The transmission signal circuit unit 12 radiates a radio wave from the antenna with the radio wave intensity (specifically, “3 dBm”) attached to the transmission signal level change instruction (step S35). As a result, the radio wave range of the wireless communication device 100-3 is changed. As a specific example, the range (“5 m”) described in the column of the 37-1 column and the 37-11 line of the radio wave range changing condition table 37 is changed.

  And control part 20-3 operates so that it may return to Step S32.

  Note that after step S34 described above, the control circuit unit 11 may send a reception signal level change instruction to the reception circuit unit 13 in addition to sending the transmission signal level change instruction. By doing so, the reception signal circuit unit 13 changes the reception signal level, that is, amplifies or attenuates the received radio wave signal.

  The operation of the third embodiment of the present invention has been described above.

  As described above, the storage unit (storage unit 30-3) of the wireless communication device (wireless communication device 100-3) of the present embodiment stores conditions for changing the reach of wireless radio waves. And when it determines with the control part (control part 20-3) being in the state where the said conditions are satisfied, it changes the intensity | strength of the electromagnetic wave which a radio | wireless part (radio | wireless part 10-3) radiates | emits.

  Therefore, according to the wireless communication apparatus of the present embodiment, it is possible to change the reach of wireless radio waves, and thus it is possible to arbitrarily change the size of the area where wireless communication is possible. In addition, the intensity of the radio wave can be reduced, and thus the power consumption of the wireless communication device can be reduced.

DESCRIPTION OF SYMBOLS 10 Radio | wireless part 11 Control circuit part 12 Transmission circuit part 13 Reception circuit part 14 Transmission / reception switching circuit part 20 Control part 30 Memory | storage part 40 Display part 50 I / F part 100 Radio | wireless communication apparatus 200 Radio | wireless terminal 300 Terminal apparatus

Claims (6)

A wireless unit that communicates wirelessly with a wireless terminal;
A storage unit for storing identification information capable of uniquely identifying the wireless terminal;
When it is detected that the identification information is included in a communication signal from the wireless terminal, a control unit that displays and outputs terminal name information of the wireless terminal;
A wireless communication apparatus comprising: When the control unit detects that the identification information is included in a communication signal from the wireless terminal, the control unit turns on an LED corresponding to the terminal name information of the wireless terminal, and transmits a communication signal from the wireless terminal. When it is detected that the identification information is not included in, the LED indicating the wireless terminal that is not stored in the storage unit is lit,
The wireless communication apparatus according to claim 1. The storage unit further stores a condition for changing the reach of radio waves,
When the control unit determines that the condition is satisfied, the control unit changes the intensity of the radio wave radiated from the radio unit.
The wireless communication apparatus according to claim 1, wherein the wireless communication apparatus is a wireless communication apparatus. When it is detected that identification information that can uniquely identify the wireless terminal is included in a communication signal from the wireless terminal, the terminal name information of the wireless terminal is displayed.
A wireless communication method. When it is detected that the identification information is included in the communication signal from the wireless terminal, an LED corresponding to the terminal name information of the wireless terminal is turned on, and the identification information is included in the communication signal from the wireless terminal. If it is detected that is not included, an LED indicating an unauthorized wireless terminal is turned on.
The wireless communication method according to claim 4. Remember the conditions for changing the radio wave coverage,
When the condition is satisfied, the intensity of the radiated radio wave is changed.
The wireless communication method according to claim 4 or 5, wherein:

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