JP6662526B2 - Wireless LAN communication device and radio wave intensity display method - Google Patents

Description

  The present invention relates to a wireless LAN communication device and a radio field intensity display method.

  When a wireless LAN system is constructed by installing a plurality of wireless LAN (Local Area Network) access points (hereinafter, referred to as access points) in a desired space, a terminal is stably connected to the access point in the desired space. It is desirable to ensure that it can be used. In order to secure such a state, it is necessary to appropriately arrange a plurality of access points in a desired space. The first condition of a suitable arrangement of access points is to avoid radio interference between access points. A second condition of a suitable arrangement of the access points is to make an area where the radio field intensity is lower than a predetermined value as small as possible.

  The following is an example of a conventional technique in which an access point manager places a plurality of access points. First, the administrator prepares a structural drawing or a plan view which is a drawing of a building or a place where an access point is installed. FIG. 12 is an example of a plan view of a concert hall 900 in which a wireless LAN system is constructed according to the related art. The administrator draws a circle centered on the access point at the location where the access point is set on the drawing. In FIG. 12, the administrator draws a circle 710 centered on the access point 810, a circle 711 centered on the access point 811 and a circle 720 centered on the access point 820. The radius of the circle indicates the range in which the terminal can stably connect to the access point when the terminal connects to the access point. Here, if the center of another circle is included in the radius of one circle, radio wave interference may occur. Therefore, the administrator draws a circle so that the radius of one circle does not include the center of another circle. In addition, the administrator arranges the circle so that the desired space is included inside the circle in order to make the area where the radio field intensity is lower than the predetermined value as small as possible. Further, when a partition, a wall, or the like is provided in a desired space, it is preferable that the administrator take into consideration the influence of the partition on the radio wave. However, in such a case, it is difficult to accurately estimate the influence of the material and the thickness of the partition and the wall on the radio wave. Therefore, a technique for measuring the radio wave intensity in an actual space has been proposed.

  Patent Literature 1 proposes an electric field strength investigation system. Such a system uses the positioning function and the electric field strength measurement function on the mobile terminal, and when the mobile service user uses the mobile terminal, the electric field strength is automatically investigated using the mobile terminal in the background and the information is obtained. Collect data on the center server. In addition, such a system uses the field strength survey results accumulated in the center server to suggest a guideline of the direction to be moved to the user using the light emitting display function of the mobile terminal.

  Patent Literature 2 proposes a wireless communication device including a control unit that performs display control of a display unit for a radio field intensity. Such a wireless communication device has a storage unit. The storage unit is a table that defines a plurality of radio field intensity ranges for determining which display state the radio field intensity is to be displayed in, and is used when the degree of radio interference between the access point and another access point is low. 1 Store a display control table. The storage unit is a table that defines a plurality of radio field intensity ranges for determining in which display state the radio field intensity is to be displayed, and is used when the degree of radio interference between the access point and another access point is high. A second display control table is stored. Then, the wireless communication device determines the level of the degree of radio wave interference with respect to the predetermined reference value, and selects one of the first display control table and the second display control table according to the determination result. Further, the wireless communication device includes control means for executing display control of the display means for the radio field intensity based on the selected display control table.

JP 2008-241663 A JP-A-2006-010131

  However, the technology described in Patent Literature 1 is a system that uses the field strength inspection results accumulated in the center server, and has a complicated configuration. Further, the technology described in Patent Literature 2 performs display control according to the degree of radio wave interference, and does not correspond to the optimum radio field intensity for installing an access point.

  The present invention has been made to solve such a problem, and provides a wireless LAN communication device and a radio field intensity display method that can easily determine an installation location of an access point.

A wireless LAN communication device according to a first aspect of the present invention includes:
A signal processing unit that receives a signal transmitted by another wireless LAN communication device and generates first radio field intensity information obtained by measuring the radio field intensity of the received signal;
Generating second radio field intensity information, which is information linking the first radio field intensity information with an identifier of the another wireless LAN communication device that has transmitted the signal, and generating the second radio field intensity information; A control unit that compares reference radio field intensity information to be compared with the first radio field intensity information included in the second radio field intensity information, and determines display content corresponding to the comparison result;
A display unit for displaying the display content determined by the control unit.

The radio wave intensity display method according to the second aspect of the present invention comprises:
Receiving a signal transmitted by another wireless LAN communication device,
Generating first radio field intensity information obtained by measuring the radio field intensity of the received signal;
Generating second radio field intensity information, which is information linking the first radio field intensity information with an identifier of the other wireless LAN communication device that transmitted the signal;
Comparing the generated second radio field intensity information with reference radio field intensity information to be compared with the first radio field intensity information included in the second radio field intensity information,
Determine the display content corresponding to the comparison result,
The determined display contents are displayed.

  Advantageous Effects of Invention According to the present invention, it is possible to provide a wireless LAN communication device and a radio field intensity display method that can easily determine an installation location of an access point.

FIG. 2 is a block diagram of the wireless LAN communication device according to the first embodiment. FIG. 2 is a plan view of a place where the wireless LAN communication device according to the first embodiment is installed. 4 is a flowchart of a process performed by the wireless LAN communication device according to the first embodiment; 5 is a table showing second radio field intensity information according to the first exemplary embodiment; 9 is a flowchart of a process for determining a display color by the wireless LAN communication device. FIG. 2 is a plan view of a place where the wireless LAN communication device according to the first embodiment is installed. 9 is a flowchart of a process performed by the wireless LAN communication device according to the second embodiment. 13 is a flowchart of a process performed by the wireless LAN communication device according to the third embodiment. 14 is a flowchart of a process of determining a display color by the wireless LAN communication device according to the fourth embodiment. 13 is a table showing colors displayed by the wireless LAN communication device according to the fourth embodiment. FIG. 14 is a plan view of a place where a wireless LAN communication device according to a fourth embodiment is installed. It is an illustration of a plan view of a concert hall 900 in which a wireless LAN system is constructed according to a conventional technique.

<First Embodiment>
Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  First, a terminal device according to an embodiment will be described with reference to FIG. FIG. 1 is a block diagram of the wireless LAN communication device according to the first embodiment. In the following description and drawings, components common to a plurality of drawings are denoted by common reference numerals. Therefore, the description of the components denoted by the same reference numerals will be appropriately omitted.

  The wireless LAN communication device 100 shown in FIG. 1 is an access point for constructing a wireless LAN system. The wireless LAN system is a LAN system that transmits and receives data using wireless communication. The wireless LAN communication device 100 according to the first embodiment can construct one wireless LAN system by a plurality of access points. A communication terminal connected to a wireless LAN system constructed by a plurality of access points appropriately changes the channel of the wireless LAN within an area connectable by the wireless LAN system and connects to an access point capable of performing stable communication. .

  The wireless LAN communication device 100 mainly includes an antenna 110, a signal processing unit 120, a storage unit 130, a control unit 140, a display unit 150, and a wired LAN transmission / reception unit 160.

  The antenna 110 transmits and receives radio waves to perform wireless communication with the terminal device. The number of antennas may be one or more.

  The signal processing unit 120 is a semiconductor for wireless communication that transmits a signal to a terminal device or the like via the antenna 110 or receives a signal from the terminal device or the like in response to an instruction from the control unit 140. The signal processing unit 120 receives the instruction from the control unit 140 and outputs the received signal to the control unit 140. Further, the signal processing unit 120 receives a signal transmitted by another access point and generates first radio field intensity information obtained by measuring the radio field intensity of the received signal. The signal processing unit 120 may be a single semiconductor chip or may be configured as a discrete. Further, the inside of the wireless LAN communication device 100 may include a plurality of signal processing units 120.

  The control unit 140 is connected to the signal processing unit 120, the storage unit 130, the display unit 150, and the wired LAN transmission / reception unit 160, and controls the operation of each unit as appropriate.

  In exchange with the signal processing unit 120, the control unit 140 instructs the signal processing unit 120 to transmit a signal or to receive a signal. Further, the control unit 140 receives the first radio field intensity information from the signal processing unit 120. Further, the control unit 140 generates second radio field intensity information that is information in which the received first radio field intensity information is associated with an identifier of another access point that has transmitted the signal.

  In the exchange with the storage unit 130, the control unit 140 causes the storage unit 130 to store the generated second radio field intensity information. Further, the control unit 140 reads the second radio field intensity information and the reference radio field intensity information stored in the storage unit 130, respectively. Then, the read second radio wave intensity information is compared with the reference radio wave intensity information, and the display content corresponding to the comparison result is determined.

  In the exchange with the display unit 150, the control unit 140 instructs the display unit 150 to display the display content determined according to the comparison result.

  In the exchange with the wired LAN transmitting / receiving section 160, the control section 140 outputs the signal received from the wired LAN transmitting / receiving section 160 to the signal processing section 120. Further, control section 140 outputs the signal received from signal processing section 120 to wired LAN transmission / reception section 160.

  The storage unit 130 is connected to the control unit 140, and temporarily stores information output by the control unit 140. The storage unit 130 stores the second radio field intensity information output by the control unit 140.

  The second radio wave intensity information is information that associates the radio wave intensity of a signal received from an access point located in the vicinity with the identifier of the access point that has transmitted the signal. The radio wave intensity may be, for example, an RSSI (Received Signal Strength Indicator) or an SNR (Signal to Noise Ratio). The identifier of the access point is, for example, a BSSID (Basic Service Set Identifier) or a MAC address (Media Access Control address). The BSSID is a unique identification signal of the access point, and is equal to the MAC address. The radio field intensity registered as the second radio field intensity information may be calculated by storing the radio field intensity for a signal received from one access point a predetermined number of times and calculating the stored radio field intensity. . Such an operation is, for example, an average value. Further, such calculation may be a standard deviation.

  The storage unit 130 further stores preset reference radio field intensity information. The reference radio field intensity information is a comparison target with the information on the radio field intensity included in the second radio field intensity information. For example, the reference radio wave intensity information has at least one threshold value indicating whether the possibility of radio wave interference with another access point is lower than a preset value. Further, the reference radio field intensity information may have two or more such thresholds.

  The storage unit 130 may be a volatile memory such as a DRAM (Dynamic Random Access Memory) or an SDRAM (Synchronous Dynamic Random Access Memory), or a flash memory or an EPROM (Erasable Programmable Read Only Memory). A non-volatile memory may be used. The storage unit 130 may be configured by combining the above-mentioned memories.

  Display unit 150 receives the instruction from control unit 140, and displays the display content determined by control unit 140. The display unit 150 is, for example, an LED that displays a plurality of colors.

  The wired LAN transmitting / receiving unit 160 performs wired LAN communication in accordance with an instruction from the control unit 140. The wired LAN transmission / reception unit 160 includes, for example, a PHY chip (Physical Layer Chip), an Ethernet (registered trademark) connector, and the like.

  The function of each of the above-described constituent elements may independently control each function, or may cover a plurality of constituent elements. Further, for example, the second radio wave intensity information may be generated by the signal processing unit 120, and the control unit 140 may receive the second radio wave intensity information generated by the signal processing unit 120.

  Next, a method of constructing a wireless LAN system using the wireless LAN communication device 100 will be described with reference to FIGS. FIG. 2 is a plan view of a place where the wireless LAN communication device according to the first embodiment is installed. The place illustrated in FIG. 2 is a concert hall, and a wireless LAN system can be realized by using a plurality of access points.

  The concert hall 900 shown in FIG. 2 has a lobby 910, a small hall 920, and a large hall 930. In the lobby 910, an access point 810 and an access point 811 are installed. In the small hall 920, an access point 820 is installed. The lobby 910 and the small hall 920 are separated by, for example, a reinforced concrete wall. Similarly, the small hall 920 and the large hall 930 are separated by, for example, a reinforced concrete wall. The lobby 910 and the large hall 930 are separated by, for example, a glass wall.

  In the concert hall 900 shown in FIG. 2, the administrator who manages the wireless LAN system newly installs an access point in the large hall 930. In such a case, the administrator determines, using the wireless LAN communication device 100, where to install the access point in the large hall 930.

  With reference to FIG. 3, among the processes performed by the wireless LAN communication device 100, a process of generating the second radio field intensity information will be described. FIG. 3 is a flowchart of a process performed by the wireless LAN communication device according to the first embodiment.

  Such a process may be started when the wireless LAN communication device 100 is started, or may be started when the wireless LAN communication device 100 is provided with a button for starting the process and pressed. Good. Alternatively, the processing may be started by receiving a command for starting such processing from outside.

  When such processing starts, first, the wireless LAN communication device 100 sets the signal processing unit 120 to the reception state (step S11). The signal processing unit 120 receives a signal by automatically scanning a channel according to a preset procedure. The received signal is, for example, a beacon signal at a frequency compliant with the standard IEEE 802.11 defined by the Institute of Electrical and Electronics Engineers, Inc. (IEEE).

  Next, the wireless LAN communication device 100 in the reception state receives a predetermined beacon signal (step S12). The beacon signal received by the wireless LAN communication device 100 includes the BSSID. When receiving the beacon signal including the BSSID, wireless LAN communication apparatus 100 reads the BSSID of the received beacon signal.

  Next, the wireless LAN communication device 100 determines whether the read BSSID has already been registered (step S13). Specifically, the wireless LAN communication device 100 compares the second radio field intensity information stored in the storage unit 130 with the read BSSID, and determines whether the read BSSID is included in the second radio field intensity information. I do.

  If the read BSSID has already been registered (step S13: Yes), the control unit 140 registers the second radio field intensity information of the beacon signal corresponding to the read BSSID (step S15).

  On the other hand, when the read BSSID is not registered (step S13: No), the control unit 140 registers the read BSSID (step S14). Then, the control unit 140 registers the second radio field intensity information of the beacon signal corresponding to the read BSSID (step S15).

  Here, the second radio field intensity information will be described in detail with reference to FIG. FIG. 4 is a table showing the second radio field intensity information according to the first embodiment. In the table of FIG. 4, the left column shows BSSID. The column next to BSSID indicates the radio wave intensity of the received signal, that is, the first radio wave intensity information. The first radio field intensity information exemplified in the table of FIG. 4 is RSSI. The wireless LAN communication device 100 can store a plurality of RSSIs. In the example of the table of FIG. 4, the wireless LAN communication device 100 stores n times of RSSI. When the wireless LAN communication device 100 stores RSSI for n times and then generates an RSSI by further receiving a signal, the oldest RSSI among the registered RSSIs is replaced with a newly generated RSSI. In addition, in the table of FIG. 4, the right column indicates the third radio field intensity information which is the average value of the RSSI. Note that the RSSI may be stored a plurality of times as described above, or may be stored once.

  That is, the second radio field intensity information is associated with the BSSID, which is the identifier of the access point, the RSSI1 to RSSIn corresponding to the BSSID, and the average radio field intensity corresponding to the RSSI1 to RSSIn. When signals are received from a plurality of access points, RSSI1 to RSSIn are associated with the average radio field intensity for each of the plurality of access points.

  Explaining in accordance with the example shown in FIG. 4, in the second radio wave intensity information, access points are registered from ID1 to IDx. Further, for example, the radio wave intensity of the signal received from the client of ID1 is 75 for RSSI1, 77 for RSSI2, and 76 for RSSIn. The third field strength information obtained by averaging the field strengths from RSSI1 to RSSIn is 76. That is, the third radio field intensity information of the client of IDx is M (IDx).

  Returning to FIG. 3, the description of the flowchart will be continued. After registering the second radio field intensity information in step S15, the wireless LAN communication device 100 shifts to a transmission state (step S16).

  Next, the wireless LAN communication device 100 that has shifted to the transmission state transmits a request packet to the access point corresponding to the BSSID that has received the packet signal (step S17). The request packet is a preset probe request signal.

  The access point that has received the request packet transmits a response packet to the received request packet. The response packet is a probe response signal corresponding to the probe request signal. When the transmission of the request packet is completed, the wireless LAN communication device 100 shifts to a reception state to receive a response packet transmitted from the access point (step S18).

  Next, in the reception state, the wireless LAN communication device 100 determines whether or not a response packet has been received within a preset time (step S19). When a response packet is received within a preset time (step S19: Yes), the wireless LAN communication device 100 generates first radio field intensity information, which is radio field intensity, from the received signal, and stores the first radio field intensity information in the second radio field intensity information. Register (step S21).

  On the other hand, when the response packet is not received within the preset time (step S19: No), it is determined that the radio field intensity between the access point that transmitted the request signal and the access point that does not stably connect to each other is not sufficient. means. Therefore, the wireless LAN communication device 100 deletes the BSSID corresponding to the response packet expected to be received and the corresponding first radio field intensity information from the second radio field intensity information (step S20).

  Next, the wireless LAN communication device 100 determines whether or not all the second radio field intensity information for the received response packet has been registered (step S22). If it is determined that all the second radio field intensity information for the received response packet is not registered (step S22: No), the wireless LAN communication device 100 returns to step S19 and receives the response packet within a preset time. It is determined whether or not it has been performed. On the other hand, if it is determined that all the second radio field intensity information for the received response packet has been registered (step S22: Yes), the wireless LAN communication apparatus 100 sets the reception channel to generate the second radio field intensity information for another channel. Switch (step S23). After switching the reception channel, the wireless LAN communication device 100 returns to step S12 and receives a beacon signal on the switched channel.

  Next, a control process of the display unit 150 will be described with reference to FIG. The wireless LAN communication device 100 determines the display color of the display unit 150 from the second radio field intensity information generated by the processing described with reference to FIG. FIG. 5 is a flowchart of a process of determining a display color by the wireless LAN communication device.

  First, the control unit 140 reads the second radio field intensity information from the storage unit 130 (Step S30). Next, the control unit 140 selects a BSSID corresponding to the strongest average radio field intensity (third radio field intensity information) from the read second radio field intensity information (step S31).

  Next, the control unit 140 determines whether the third radio field intensity information of the selected BSSID is smaller than the threshold value TH1 of the reference radio field intensity information (Step S32).

  When the third radio field intensity information of the selected BSSID is smaller than the threshold value TH1 of the reference radio field intensity information (step S32: Yes), the location where the wireless LAN communication device 100 is currently located is radio interference with another access point. Is less than a preset value. Therefore, the control unit 140 determines to display the color 1 on the display unit 150 (step S33). Color 1 indicates that the installation of the wireless LAN communication device 100 is recommended.

  On the other hand, if the third radio field intensity information of the selected BSSID is not smaller than the threshold value TH1 of the reference radio field intensity information (step S32: No), the location where the wireless LAN communication device 100 is currently located is different from other access points. Is higher than the preset value. Therefore, control unit 140 determines to display color 2 on display unit 150 (step S34). Color 2 indicates that installation of the wireless LAN communication device 100 is not recommended.

  Next, a recommended installation area of the wireless LAN communication device 100 will be described with reference to FIG. FIG. 6 is a plan view of a place where the wireless LAN communication device according to the first embodiment is installed. In FIG. 6, a hatched pattern indicated by a broken line indicates a recommended installation area 600 of the wireless LAN communication device 100. The recommended installation area 600 is obtained by moving the wireless LAN communication device 100 and summing up the areas where the display unit 150 displays the color 1 in each of the moved places. In the concert hall 900 shown in FIG. 6, an access point newly installed in the large hall 930 may be an arbitrary position in the recommended installation area 600.

  As described above, the first embodiment can provide a wireless LAN communication device and a radio field intensity display method that can easily determine an installation location of an access point.

<Embodiment 2>
Next, a second embodiment will be described with reference to FIG. The wireless LAN communication device according to the second embodiment has the same hardware configuration as the wireless LAN communication device 100 according to the first embodiment. The wireless LAN communication device according to the second embodiment is different from the wireless LAN communication device 100 according to the first embodiment in processing when generating the second radio field intensity information.

  FIG. 7 is a flowchart of a process performed by the wireless LAN communication device according to the second embodiment. The wireless LAN communication device according to the second embodiment does not transmit a request signal to the access point when generating the second radio field intensity information. That is, the wireless LAN communication device according to the second embodiment generates a radio wave intensity from a beacon signal. More specifically, the flowchart shown in FIG. 7 omits steps S16 to S22 of the flowchart shown in FIG. That is, the wireless LAN communication device according to the second embodiment switches the channel (step S23) after registering the second radio field intensity information corresponding to the received beacon signal (step S15). Then, after switching the channel, the wireless LAN communication device according to the second embodiment returns to step S12 again and receives a beacon signal on the switched channel.

  As described above, by simplifying the routine, the second embodiment can generate the second radio field intensity information in a short time, and can easily determine the installation location of the access point and the radio field intensity. A display method can be provided.

<Embodiment 3>
Next, a third embodiment will be described with reference to FIG. The wireless LAN communication device according to the third embodiment has the same hardware configuration as the wireless LAN communication device 100 according to the first embodiment. The wireless LAN communication device according to the third embodiment differs from the wireless LAN communication device 100 according to the first embodiment in processing when generating the second radio field intensity information. The wireless LAN communication apparatus according to the third embodiment is different from the first and second embodiments in that a channel to be received is set in advance.

  FIG. 8 is a flowchart of a process performed by the wireless LAN communication device according to the third embodiment. The wireless LAN communication apparatus according to the third embodiment sets a channel to be received in advance, and generates the second radio field intensity information only for the set channel. That is, when the process performed by the wireless LAN communication device according to the third embodiment starts, the wireless LAN communication device sets a reception channel (step S10). The reception channel to be set may be fixed or may be a channel set by the administrator before starting such processing. When the reception channel is set, the wireless LAN communication device according to the third embodiment enters a reception state to receive a beacon signal of the set channel (step S11). Thereafter, the processing from step S11 to step S14 is the same as in the first embodiment.

  The wireless LAN communication device according to the third embodiment does not transmit a request signal to the access point when generating the second radio field intensity information. That is, the wireless LAN communication device according to the third embodiment generates a radio wave intensity from a beacon signal. After registering the second radio field intensity information corresponding to the received beacon signal (step S15), the wireless LAN communication device according to the third embodiment returns to step S12 and receives the beacon signal of the same channel again.

  By adopting such a configuration, the third embodiment generates the second radio field intensity information in a short time when an adjacent channel is unlikely to interfere, for example, in the 5 GHz band, and easily installs an access point. It is possible to provide a wireless LAN communication device and a radio field intensity display method capable of determining a place.

<Embodiment 4>
Next, a fourth embodiment will be described with reference to FIGS. The wireless LAN communication device according to the fourth embodiment is different from the wireless LAN communication device 100 according to the first embodiment in that the wireless LAN communication device according to the fourth embodiment has a plurality of thresholds to be compared with the third radio field intensity information. The wireless LAN communication device according to the fourth embodiment also differs from the wireless LAN communication device 100 according to the first embodiment in that the display unit 150 has three colors.

  FIG. 9 is a flowchart of a process of determining a display color by the wireless LAN communication device according to the fourth embodiment. First, the control unit 140 reads the second radio field intensity information from the storage unit 130 (Step S40). Next, the control unit 140 selects the BSSID corresponding to the strongest third radio field intensity information from the read second radio field intensity information (step S41).

  Next, the control unit 140 compares the third radio field intensity information of the selected BSSID with a plurality of thresholds included in the reference radio field intensity information (step S42).

  Here, the relationship between the result of comparing the third radio field intensity information with the reference radio field intensity information and the display color corresponding to the result will be described with reference to FIG. FIG. 10 is a table illustrating colors displayed by the wireless LAN communication device according to the fourth embodiment. In FIG. 10, the left column shows patterns. The middle column shows the result of comparison between the third radio field intensity information and the reference radio field intensity information. The right column shows the display colors.

  In the case of the pattern P1, the third radio field intensity information is larger than 50. In this case, the display color is color 1 (red). In the case of the pattern P2, the third radio field intensity information is larger than 30 and equal to or smaller than 50. In this case, the display color is color 2 (orange). In the case of the pattern P3, the third radio field intensity information is 30 or less. In this case, the display color is color 3 (green). The wireless LAN communication device according to the fourth embodiment determines a display color based on the table shown in FIG.

  In the example of FIG. 10, color 1 indicates that radio interference with another access point has occurred and the terminal cannot be connected to the access point in a stable manner. Color 2 indicates that radio interference with another access point may occur, and a desired throughput may not be obtained in communication between the terminal and the access point. Color 3 indicates that the possibility that radio wave interference with another access point will occur is lower than a preset value, and the installation of the wireless LAN communication device 100 is recommended.

  Returning to FIG. 9, the description will be continued. In step S42, as a result of comparing the third radio field intensity information with the reference radio field intensity information, if it is determined that the pattern P1 corresponds to the pattern P1 in FIG. 10 (step S42: pattern P1), the control unit 140 displays the color 1 Is determined to be displayed (step S43). Similarly, when it is determined that the pattern P2 corresponds to the pattern P2 in FIG. 10 (step S42: pattern P2), the control unit 140 determines to display the color 2 on the display unit 150 (step S44). Similarly, when it is determined that the pattern P3 corresponds to the pattern P3 in FIG. 10 (step S42: pattern P3), the control unit 140 determines to display the color 3 on the display unit 150 (step S45).

  FIG. 11 is a plan view of a place where the wireless LAN communication device according to the fourth embodiment is installed. In FIG. 11, a hatched area indicated by a broken line indicates a recommended installation area 600 of the wireless LAN communication device according to the fourth embodiment. In the recommended installation area 600, the wireless LAN communication device according to the fourth embodiment displays color 3. In the area 500, the wireless LAN communication device according to the fourth embodiment displays the color 2. Further, in areas 410, 411, and 420, the wireless LAN communication device according to the fourth embodiment displays color 1.

  As described above, by indicating the degree of the radio wave interference with a plurality of colors, the fourth embodiment can easily indicate the installation location of the access point.

  It should be noted that the present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the gist. For example, the content displayed by the display unit may not depend on the color but on the frequency of blinking the display of a single color. Further, the color of the display unit is not limited to two or three colors as described above, and may be four or more colors. Accordingly, the reference radio field intensity information may have three or more threshold values. Alternatively, the display unit may display character information or the like using an LCD instead of the LED.

  Some or all of the above embodiments may be described as in the following supplementary notes, but are not limited thereto.

(Appendix 1)
A signal processing unit that receives a signal transmitted by another wireless LAN communication device and generates first radio field intensity information obtained by measuring the radio field intensity of the received signal;
Generating second radio field intensity information, which is information in which the first radio field intensity information is associated with an identifier of the other wireless LAN communication device that has transmitted the signal, and generating the second radio field intensity information; A control unit that compares reference radio field intensity information to be compared with the first radio field intensity information included in the second radio field intensity information, and determines display content corresponding to the comparison result;
A display unit that displays the display content determined by the control unit,
A wireless LAN communication device comprising:

(Appendix 2)
The signal processing unit receives signals transmitted by a plurality of other wireless LAN communication devices, respectively, and generates the first radio field intensity information for each of the plurality of other wireless LAN communication devices,
The control unit generates the second radio field intensity information, which is information in which the first radio field intensity information is associated with each of the identifiers of the plurality of other wireless LAN communication devices, and includes the second radio field intensity information in the second radio field intensity information. Comparing the first radio field intensity information corresponding to the strongest radio field intensity and the reference radio field intensity information among the plurality of first radio field intensity information,
The wireless LAN communication device according to supplementary note 1.

(Appendix 3)
The signal processing unit receives the signal transmitted by the other wireless LAN communication device a plurality of times, and generates a plurality of the first radio field intensity information corresponding to the plurality of times of the signal,
The control unit calculates third radio field intensity information which is a value obtained by calculating the plurality of first radio field intensity information for each identifier, and calculates a value of the calculated third radio field intensity information and the reference radio field intensity information. Compare,
3. The wireless LAN communication device according to claim 1 or 2.

(Appendix 4)
The signal processing unit transmits a request signal to the another wireless LAN communication device, receives a response signal to the transmitted request signal from the other wireless LAN communication device, and relates to a radio wave intensity of the received response signal. Generating the first radio field intensity information;
The wireless LAN communication device according to any one of supplementary notes 1 to 3.

(Appendix 5)
The reference radio wave intensity information has at least one threshold value indicating whether the possibility of radio wave interference with the another wireless LAN communication device is lower than a preset value,
The control unit compares the first radio field intensity information with the reference radio field intensity information, and when the first radio field intensity information is lower than the threshold, displays a display content recommending installation of a wireless LAN communication device. Decide to do
The wireless LAN communication device according to any one of supplementary notes 1 to 4.

(Appendix 6)
Receiving a signal transmitted by another wireless LAN communication device,
Generating first radio field intensity information obtained by measuring the radio field intensity of the received signal;
Generating second radio field intensity information, which is information linking the first radio field intensity information with an identifier of the other wireless LAN communication device that transmitted the signal;
Comparing the generated second radio field intensity information with reference radio field intensity information to be compared with the first radio field intensity information included in the second radio field intensity information,
Determine the display content corresponding to the comparison result,
Displaying the determined display content,
Signal strength display method.

(Appendix 7)
The process of receiving the signal is a process of receiving signals transmitted by a plurality of other wireless LAN communication devices,
The process of generating the first radio field intensity information is a process of generating the first radio field intensity information for each of the plurality of other wireless LAN communication devices,
The process of generating the second radio field intensity information is a process of generating the second radio field intensity information, which is information obtained by linking the first radio field intensity information for each of the identifiers of the plurality of other wireless LAN communication devices. Yes,
The comparing process is a process of comparing the first radio field intensity information corresponding to the strongest radio field intensity and the reference radio field intensity information among a plurality of the first radio field intensity information included in the second radio field intensity information. Is,
A radio field intensity display method according to appendix 6.

(Appendix 8)
The process of receiving the signal is a process of receiving the signal transmitted by the other wireless LAN communication device a plurality of times,
The process of generating the first radio field intensity information is a process of generating a plurality of the first radio field intensity information corresponding to the plurality of times of signals, respectively.
The comparing process calculates third radio field intensity information that is a value obtained by calculating the plurality of first radio field intensity information for each identifier, and calculates a value of the calculated third radio field intensity information and the reference radio field intensity information. Is a process of comparing
A radio field intensity display method according to appendix 6 or 7.

(Appendix 9)
The apparatus further includes a process of transmitting a request signal that is a preset signal,
The process of receiving the signal is a process of receiving a response signal to the transmitted request signal from the other wireless LAN communication device,
The process of generating the first radio field intensity information is a process of generating the first radio field intensity information relating to the radio field intensity of the received response signal.
The radio wave intensity display method according to any one of supplementary notes 6 to 8.

(Appendix 10)
The reference radio wave intensity information has at least one threshold value indicating whether the possibility of radio wave interference with the another wireless LAN communication device is lower than a preset value,
In the process of determining the display content, the first radio field intensity information is compared with the reference radio field intensity information, and if the first radio field intensity information is lower than the threshold, installation of a wireless LAN communication device is recommended. It is a process of deciding to display the display content,
The radio wave intensity display method according to any one of supplementary notes 6 to 9.

(Appendix 11)
A program for causing a computer to execute the following method,
The method comprises:
Receiving a signal transmitted by another wireless LAN communication device,
Generating first radio field intensity information obtained by measuring the radio field intensity of the received signal;
Generating second radio field intensity information, which is information linking the first radio field intensity information with an identifier of the other wireless LAN communication device that transmitted the signal;
Comparing the generated second radio field intensity information with reference radio field intensity information to be compared with the first radio field intensity information included in the second radio field intensity information,
Determine the display content corresponding to the comparison result,
Displaying the determined display content,
Signal strength display program.

(Appendix 12)
The process of receiving the signal is a process of receiving signals transmitted by a plurality of other wireless LAN communication devices,
The process of generating the first radio field intensity information is a process of generating the first radio field intensity information for each of the plurality of other wireless LAN communication devices,
The process of generating the second radio field intensity information is a process of generating the second radio field intensity information, which is information obtained by linking the first radio field intensity information for each of the identifiers of the plurality of other wireless LAN communication devices. Yes,
The comparing process is a process of comparing the first radio field intensity information corresponding to the strongest radio field intensity and the reference radio field intensity information among a plurality of the first radio field intensity information included in the second radio field intensity information. Is,
A radio field intensity display program according to supplementary note 11.

(Appendix 13)
The process of receiving the signal is a process of receiving the signal transmitted by the other wireless LAN communication device a plurality of times,
The process of generating the first radio field intensity information is a process of generating a plurality of the first radio field intensity information corresponding to the plurality of times of signals, respectively.
The comparing process calculates third radio field intensity information that is a value obtained by calculating the plurality of first radio field intensity information for each identifier, and calculates a value of the calculated third radio field intensity information and the reference radio field intensity information. Is a process of comparing
The radio wave intensity display program according to appendix 11 or 12.

(Appendix 14)
The apparatus further includes a process of transmitting a request signal that is a preset signal,
The process of receiving the signal is a process of receiving a response signal to the transmitted request signal from the other wireless LAN communication device,
The process of generating the first radio field intensity information is a process of generating the first radio field intensity information relating to the radio field intensity of the received response signal.
The radio wave intensity display program according to any one of supplementary notes 11 to 13.

(Appendix 15)
The reference radio wave intensity information has at least one threshold value indicating whether the possibility of radio wave interference with the another wireless LAN communication device is lower than a preset value,
In the process of determining the display content, the first radio field intensity information is compared with the reference radio field intensity information, and if the first radio field intensity information is lower than the threshold, installation of a wireless LAN communication device is recommended. It is a process of deciding to display the display content,
The radio wave intensity display program according to any one of supplementary notes 11 to 14.

Reference Signs List 100 communication device 110 antenna 120 signal processing unit 130 storage unit 140 control unit 150 display unit 160 transmission / reception unit 600 recommended installation area 810, 811, 820 access point 900 concert hall 910 lobby 920 small hall 930 large hall

Claims (6)

Receiving a signal in which a plurality of other wireless LAN communication device transmits respectively, for each of the plurality of other wireless LAN communication device, a signal processing unit for generating a first radio wave intensity information measured radio field intensity of said received signal When,
Generating second radio field intensity information, which is information in which the first radio field intensity information and identifiers of the plurality of other wireless LAN communication devices that transmitted the signal are generated, and generating the second radio field intensity information . The first radio field intensity information corresponding to the highest radio field intensity among the plurality of the first radio field intensity information included is compared with reference radio field intensity information to be compared , and the display content corresponding to the comparison result is determined. A control unit to
A display unit that displays the display content determined by the control unit,
Equipped with a,
The reference radio wave intensity information has at least one threshold value indicating whether the possibility of radio wave interference with the other wireless LAN communication device is lower than a preset value,
The control unit compares the first radio field intensity information corresponding to the strongest radio field intensity with the reference radio field intensity information. If the first radio field intensity information corresponding to the highest radio field intensity is lower than the threshold, , Determine to display the display content recommending the installation of the wireless LAN communication device,
Wireless LAN communication device. The signal processing unit receives the signal transmitted by the other wireless LAN communication device a plurality of times, and generates a plurality of the first radio field intensity information corresponding to the signal received a plurality of times, respectively.
The control unit calculates third radio field intensity information which is a value obtained by calculating the plurality of first radio field intensity information for each identifier, and calculates a value of the calculated third radio field intensity information and the reference radio field intensity information. Compare,
The wireless LAN communication device according to claim 1 . The signal processing unit transmits a request signal to the another wireless LAN communication device, receives a response signal to the transmitted request signal from the other wireless LAN communication device, and relates to a radio wave intensity of the received response signal. Generating the first radio field intensity information;
Wireless LAN communication apparatus according to claim 1 or 2. Receiving signals transmitted by a plurality of other wireless LAN communication devices, respectively ;
For each of the plurality of other wireless LAN communication devices , generate first radio field intensity information obtained by measuring the radio field intensity of the received signal,
Generating second radio field intensity information, which is information linking the first radio field intensity information with identifiers of the plurality of other wireless LAN communication devices that transmitted the signal;
Among the plurality of first radio field intensity information included in the generated second radio field intensity information , the first radio field intensity information corresponding to the strongest radio field intensity is compared with reference radio field intensity information to be compared ,
Determine the display content corresponding to the comparison result,
Displaying the determined display content, a radio field intensity display method ,
The reference radio wave intensity information has at least one threshold value indicating whether the possibility of radio wave interference with the another wireless LAN communication device is lower than a preset value,
The process of determining the display content includes comparing the first radio field intensity information corresponding to the strongest radio field intensity with the reference radio field intensity information, and comparing the first radio field intensity information corresponding to the highest radio field intensity with the threshold value. If it is lower, it is a process of deciding to display the display content recommending the installation of the wireless LAN communication device.
Signal strength display method. The process of receiving the signal is a process of receiving the signal transmitted by the other wireless LAN communication device a plurality of times,
The process of generating the first radio field intensity information is a process of generating a plurality of pieces of the first radio field intensity information corresponding to the signals received a plurality of times, respectively.
The comparing process calculates third radio field intensity information that is a value obtained by calculating the plurality of first radio field intensity information for each identifier, and calculates a value of the calculated third radio field intensity information and the reference radio field intensity information. Is a process of comparing
The radio wave intensity display method according to claim 4 . The apparatus further includes a process of transmitting a request signal that is a preset signal,
The process of receiving the signal is a process of receiving a response signal to the transmitted request signal from the other wireless LAN communication device,
The process of generating the first radio field intensity information is a process of generating the first radio field intensity information relating to the radio field intensity of the received response signal.
The radio field intensity display method according to claim 4 .

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