JP2021019269A - Access point, radio connection method and radio connection control program - Google Patents

Abstract

To provide an AP (Access Point: hereafter, abbreviated as AP) for enabling automatic connection to a self AP after releasing attribution to an other AP while allowing a user not to require and be aware of all the operations even though a radio slave unit is attributed to the other AP when the radio slave unit such as a smart phone or a tablet approaches the self AP.SOLUTION: An AP 25 includes a radio slave unit approach detection part 32 for detecting that a radio slave unit 29 approaches the AP 25 on the basis of a result of acquiring radio field intensity therearound, a radio slave unit attribution release part 33 for forcibly setting the radio slave unit 29 in a state in which it is not attributed to any other AP, and a radio slave unit connection part 34 for attributing the radio slave unit 29 to a self AP 25 by variably controlling an SSID, an encryption system and an encryption key of the self AP 25 to make them coincident with profile information stored by the radio slave unit 29, and connecting the radio slave unit 29 to the self AP 25.SELECTED DRAWING: Figure 1

Description

The present invention relates to an access point, a wireless connection method and a wireless connection control program, and in particular, when it detects that a wireless slave unit such as a smartphone or tablet is approaching, any other access point. The wireless slave unit is forcibly set to a state in which it does not belong to the local access point, and the operation of assigning the wireless slave unit to the own access point is automatically performed so that the wireless communication with the own access point is possible. It relates to an access point with an automatic connection function, a wireless connection method, and a wireless connection control program that can automatically migrate a slave unit.

In recent years, there has been an increasing need to connect a wireless terminal such as a smartphone or tablet to an access point (wireless master unit) as a wireless slave unit. As a method for meeting such needs, a method of setting the access point's SSID (Service Set Identifier), encryption method and encryption key by manual operation of the wireless slave unit, a method of using WPS (Wi-Fi Protected Setup), There is a method of using a tool for connecting. As a method of using a tool for connecting, for example, an easy QR (Quick Response) start and an easy "hold up" start are known.

However, regardless of which method is used, it is necessary for the user to set the wireless slave unit or the access point by himself / herself. That is, in the current technology, there is no method of automatically connecting the wireless slave unit to the access point without any operation of setting by the user himself / herself. In order to overcome this situation, the wireless slave unit is automatically connected to another access point when the communication between the wireless slave unit and the access point is interrupted, without the need for manual operation by the user of the wireless slave unit. A method of doing this and a method of automatically controlling the wireless communication band have been proposed.

For example, in Japanese Patent Application Laid-Open No. 2006-513644, "Methods and devices for reestablishing communication for a wireless communication device after communication loss in a wireless network", the wireless communication device (wireless slave unit) is wireless. It proposes a method for a wireless communication device to automatically reestablish communication with a wireless network when communication in the network is lost.

In Patent Document 1, a wireless network is a radio associated with a loss of communication within a wireless network in order to reestablish communication with the wireless communication device after a loss of communication with the wireless communication device. The identifier of the communication device is broadcast via the control communication path.

Further, the wireless communication device monitors the control communication path after reacquiring the coverage related to the wireless signal, decodes the identifier broadcast from the wireless network, and compares it with the identifier of the own wireless communication device. Based on the recognition that the broadcast identifier and the identifier of the own wireless communication device have been matched, the wireless communication device sends a control message notifying the wireless network of the existence of the local wireless communication device. The wireless network, on the other hand, determines whether the wireless communication device is present in the coverage of the wireless signal and controls the reestablishment process, depending on whether the control message is received from the wireless communication device. .. Thus, even if the wireless communication device loses communication in the wireless network, communication with the wireless network can be automatically reestablished.

Further, Japanese Patent Application Laid-Open No. 2011/151884 “Communication device and communication method” controls a band when communication is performed between a transmission terminal and a reception terminal, which are wireless slave units, via a wireless network. Proposing a method. In Patent Document 2, when a transmitting terminal and a receiving terminal try to communicate via a wireless network, in a wireless communication device (wireless master unit) that controls a band of wireless communication, between the transmitting terminal and the receiving terminal. Bandwidth is measured for at least one of the two-way communications. Then, the wireless communication device suppresses or promotes the band by adjusting the transmission interval of the packet transmitted / received between the transmitting terminal and the receiving terminal based on the comparison result between the measured band and the read target band. It can be done automatically.

Further, Japanese Patent Application Laid-Open No. 2013-536635 “Communication method and system of new network” of Patent Document 3 makes it possible to guarantee the stability and smoothness of a transmission path, avoid delays in multimedia operations, and provide national information. It proposes a new communication method that makes it possible to guarantee maintenance needs and save hardware resources. That is, in Patent Document 3, the main control server includes a step of setting a downlink for each communication service and a step of transmitting a packet transmitted by a source terminal via the set downlink to a target terminal. By having it, it is possible to automatically guarantee the network transmission quality.

Further, Patent Document 4 International Publication No. 2016/075948 “Reproduction method, reproduction device and program” proposes a technique for automatically enabling the content to be appropriately reproduced. In Patent Document 4, the signal receiving step of receiving the visible light signal from the transmitter that transmits the visible light signal due to the change in the brightness of the light source by the sensor of the terminal device, and the visible light signal from the terminal device are supported. Content that the terminal device receives from the server content information including a transmission step of transmitting a request signal for requesting the attached content to the server and data to be reproduced at each time and the terminal device. The configuration includes a reception step and a reproduction step of reproducing the data corresponding to the time of the clock provided in the terminal device among the received content information. Thus, the terminal device can automatically enable the desired content to be played back appropriately.

Further, Japanese Patent Application Laid-Open No. 2016/136256 “Signal Generation Method, Signal Generation Device and Program” automatically transmits a visible light signal from a transmitter to efficiently communicate between devices. We are proposing the technology to realize it. In Patent Document 5, one of a single-frame transmission method in which data is transmitted as one frame and a multi-frame transmission method in which data is divided into a plurality of frames and transmitted is used as a transmitter. When it is decided to use the multi-frame transmission method and the step of determining the method of transmitting as a visible light signal from, the partition type information indicating the type of the transmission target data is generated and added to the transmission target data to combine them. By generating data, by dividing the combined data into multiple data parts, by generating multiple frames containing each of the multiple data parts, and by adding a preamble to the beginning of each of the multiple frames. , And a step of generating a visible light signal. Therefore, efficient communication between devices is automatically realized by using visible light signals.

Special Table 2006-513644A International Publication No. 2011/151884 Special Table 2013-536635 International Publication No. 2016/075948 International Publication No. 2016/136256

However, each of the automation techniques described in Patent Documents 1 to 5 related to the present invention has the following problems to be solved, and it is difficult to put any of the techniques into practical use.

That is, the technique described in Patent Document 1 is automatically transmitted from the wireless network after the wireless communication device (wireless slave unit) loses communication with the access point (wireless master unit) in the wireless network. It is a technology that can reestablish a connection between a wireless communication device and any access point in a wireless network based on the incoming identifier. However, Patent Document 1 does not describe a means for canceling the attribution with the access point that was attributed before the communication blackout, and the technique of Patent Document 1 enables automatic reestablishment. It's hard to say.

Further, the technique described in Patent Document 2 is a transmission terminal and a receiving terminal based on a measurement result of a band in one-way communication between a transmitting terminal and a receiving terminal in an access point having a band control function. It is a technology that automatically controls the bandwidth of communication with and from. However, in Patent Document 2, for example, by variably changing the SSID, encryption method, and encryption key of the access point, the profile information stored in the transmitting terminal and the receiving terminal can be matched with other access points. Since there is no description regarding the control of canceling the attribution with and automatically assigning it to the access point, it cannot be said that the technique of Patent Document 2 is a technique that automatically enables band control.

Further, the technique described in Patent Document 3 automatically guarantees network transmission quality by transmitting a packet from a source terminal to a remote terminal via a downlink of each communication service set by the main control server. It is a technology. However, as in the case of Patent Document 2, since there is no description in Patent Document 3 regarding the control that the source terminal cancels the attribution with other access points that have been assigned so far, the technique of Patent Document 3 is automatic. It is hard to say that it is a technology that enables the guarantee of transmission quality.

Further, the technique described in Patent Document 4 is described in that a terminal device that receives a visible light signal from a light source transmits a request signal for requesting content associated with the visible light signal to a server. It is a technology that automatically reproduces the corresponding data among the content information received from the server. However, as in the case of Patent Document 2, Patent Document 4 does not describe the control that the source terminal cancels the attribution with other access points that have been attributed so far, and the technique of Patent Document 4 is appropriate content. It is hard to say that it is a technology that enables automatic playback of.

Further, the technique described in Patent Document 5 is a technique for automatically realizing efficient communication between devices by transmitting a visible light signal from a transmitter. However, as in the case of Patent Document 2, the technique of Patent Document 5 is efficient because there is no description in Patent Document 5 regarding the control that the transmitting terminal cancels the attribution with other access points that have been attributed so far. It is hard to say that it is a technology that automatically enables such communication.

(Purpose of the present invention)
In view of the above problems in the current technology, an object of the present invention is to detect that a wireless slave unit such as a smartphone or tablet is approaching, without requiring any user operation. It is possible to forcibly set the wireless slave unit so that it does not belong to any access point, automatically perform the operation of assigning the wireless slave unit to the own access point, and communicate with the own access point. The present invention provides an access point with an automatic connection function, a wireless connection method, and a wireless connection control program capable of automatically shifting the wireless slave unit to a state.

In order to solve the above-mentioned problems, the access point, the wireless connection method, and the wireless connection control program according to the present invention mainly adopt the following characteristic configurations.

(1) The access point according to the present invention is
An access point that has the function of connecting a wireless handset.
Based on the result of acquiring the radio wave strength around the own access point, the wireless slave unit approach detection unit that detects that the wireless slave unit is approaching the own access point, and
When it is detected that the wireless slave unit is approaching its own access point, the wireless slave unit is forcibly set to a state in which it does not belong to any other access point. Department and
After setting the wireless slave unit to a state in which it does not belong to any of the other access points, the SSID (Service Set Identifier), encryption method, and encryption key of the own access point are variably controlled to control the wireless. By matching the profile information stored in the slave unit, the wireless slave unit is assigned to the own access point, and the wireless slave unit is connected to the own access point.
It is characterized by having.

(2) The wireless connection method according to the present invention is
A wireless connection method for access points that has the function of connecting wireless slave units.
Based on the result of acquiring the radio wave strength around the own access point, the wireless slave unit approach detection step for detecting that the wireless slave unit is approaching the own access point, and
When it is detected that the wireless slave unit is approaching its own access point, the wireless slave unit is forcibly set to a state in which it does not belong to any other access point. Steps and
After setting the wireless slave unit to a state in which it does not belong to any of the other access points, the SSID (Service Set Identifier), encryption method, and encryption key of the own access point are variably controlled to control the wireless. By matching the profile information stored in the slave unit, the wireless slave unit is assigned to the own access point, and the wireless slave unit is connected to the own access point.
It is characterized by having.

(3) The wireless connection control program according to the present invention is
A wireless connection control program executed by an access point that has the function of connecting a wireless slave unit.
Based on the result of acquiring the radio wave strength around the own access point, the wireless slave unit approach detection process for detecting that the wireless slave unit is approaching the own access point, and
When it is detected that the wireless slave unit is approaching its own access point, the wireless slave unit is forcibly set to a state in which it does not belong to any other access point. Process and
After setting the wireless slave unit to a state in which it does not belong to any of the other access points, the SSID (Service Set Identifier), encryption method, and encryption key of the own access point are variably controlled to control the wireless. A wireless slave unit connection step of assigning the wireless slave unit to the own access point and connecting the wireless slave unit to the own access point by matching the profile information stored in the slave unit.
It is characterized by having.

According to the access point, the wireless connection method, and the wireless connection control program of the present invention, the following effects can be mainly obtained.

The access point according to the present invention is an access point with an automatic connection function, and when a wireless slave unit such as a smart phone or a tablet detects that it is approaching the own access point, the wireless slave unit is used as another access point. After forcibly setting the state so that it does not belong to any access point, the operation of assigning the wireless slave unit to the own access point is automatically performed, so that the wireless slave unit communicates with the own access point. It can be automatically transitioned to a state where it can be done.

It is a block block diagram which shows an example of the whole structure of the access point which concerns on this invention. It is explanatory drawing which shows typically the channel frequency band and bandwidth (HT20 and HT40) used by the access point of FIG. 1 in the frequency band of 2.4GHz. It is explanatory drawing which shows typically the channel frequency band and bandwidth (VHT20, VHT40 and VHT80) used by the access point of FIG. 1 in the frequency band of 5 GHz. It is a flowchart which shows an example of the operation which discriminates the frequency band and the bandwidth (bandwidth) used in the other access point which an access point of FIG. 1 is connected through a wireless I / F (interface). When the access point in FIG. 1 detects that the frequency band and bandwidth (bandwidth) used by other access points located in the vicinity are 2.4 GHz HT20, it is used by the other access point. It is a flowchart which shows an example of the operation which determines whether the radio wave strength (RSSI) of 2.4GHz HT20 is strong / medium / weak. When the access point in FIG. 1 detects that the frequency band and bandwidth (bandwidth) used by other access points located in the vicinity are 2.4 GHz HT40, it is used by the other access point. It is a flowchart which shows an example of the operation which determines whether the radio wave strength (RSSI) of 2.4GHz HT40 is strong / medium / weak. When the access point of FIG. 1 detects that the frequency band and bandwidth (bandwidth) used by other access points located in the vicinity are 5 GHz VHT20, it is used by the other access point. It is a flowchart which shows an example of the operation which determines whether the radio wave strength (RSSI) of 5GHz VHT20 is strong / medium / weak. When the access point of FIG. 1 detects that the frequency band and bandwidth (bandwidth) used by other access points located in the vicinity are 5 GHz VHT40, it is used by the other access point. It is a flowchart which shows an example of the operation which determines whether the radio wave strength (RSSI) of 5GHz VHT40 is strong / medium / weak. When the access point of FIG. 1 detects that the frequency band and bandwidth (bandwidth) used by other access points located in the vicinity are 5 GHz VHT80, it is used by the other access point. It is a flowchart which shows an example of the operation which determines whether the radio wave strength (RSSI) of 5GHz VHT80 is strong / medium / weak. FIG. 5 is a waveform diagram schematically showing an example of a transmission waveform in which the access point shown in FIG. 1 bursts and transmits an attribution release frame with a frame burst time of less than 4 msec (milliseconds). FIG. 5 is a waveform diagram schematically showing an example of a transmission waveform in which the access point shown in FIG. 1 bursts and transmits an attribution release frame with a frame burst time of 0 msec (milliseconds). FIG. 5 is a flowchart showing an example of an operation when the access point of FIG. 1 sets an encryption method with a wireless slave unit newly attributed at the wireless slave unit connection portion.

Hereinafter, preferred embodiments of the access point, wireless connection method, and wireless connection control program according to the present invention will be described with reference to the accompanying drawings. In the following description, the access point and the wireless connection method according to the present invention will be described, but the wireless connection method may be implemented as a wireless connection control program that can be executed by a computer, or the wireless connection may be performed. Needless to say, the control program may be recorded on a computer-readable recording medium. Further, it is needless to say that the drawing reference reference numerals attached to the following drawings are added to each element for convenience as an example for assisting understanding, and the present invention is not intended to be limited to the illustrated embodiment. No.

(Features of the present invention)
Prior to the description of the embodiments of the present invention, the features of the present invention will be first outlined. The present invention relates to an access point having an automatic connection function for automatically connecting a wireless slave unit, a wireless connection method, and a wireless connection control program. In the present invention, when it is detected that a wireless slave unit (wireless terminal) such as a smartphone or tablet belonging to another access point is approaching the access point with the automatic connection function according to the present invention, The access point with the automatic connection function according to the present invention first has a frame burst time of 0 msec (all channels) for all bands (all channels) of all frequency bands (2.4 GHz and 5 GHz) that can be used for the access point. The main feature is that the attribution release frame is burst-transmitted in (milliseconds), and the attribution to the other access point that the wireless slave unit (wireless terminal) may have been assigned to is forcibly released. It is one. Then, after that, the access point with the automatic connection function according to the present invention performs an operation of variably controlling the SSID, the encryption method, and the encryption key of the own access point, and is stored in the wireless terminal. One of the main features is that the wireless slave unit is automatically assigned to the access point with the automatic connection function according to the present invention by matching with the profile information.

Here, the burst transmission for the entire band transmitted with a frame burst time of 0 msec is 2.4 GHz 1ch to 14ch, 5 GHz W52 (36ch, 40ch, 44ch, 48ch), W53 (52ch, 56ch, 60ch, 64ch), W56 ( It means that the frame burst time is 0 msec for each of 100ch, 104ch, 108ch, 112ch, 116ch, 120ch, 124ch, 128ch, 132ch, 136ch, 140ch, 144ch).

As described above, the smart phone approaching the access point with the automatic connection function according to the present invention by performing the burst transmission operation with the frame burst time of 0 msec of the attribution release frame for the entire band that can be used for the access point. Even if a wireless slave unit (wireless terminal) such as a tablet or a tablet belongs to another access point, communication with the other access point to which it has belonged is immediately disconnected, and it belongs to the past. The attribution to other access points that had been done is canceled.

The access point with an automatic connection function according to the present invention is an approaching wireless slave unit (wireless) such as a smart phone or tablet by changing the SSID, encryption method and encryption key of the own access point. When matching with the profile information of the terminal), the SSID and the encryption key are matched with the profile information of the wireless slave unit (wireless terminal), and the wireless slave unit (wireless terminal) is automatically assigned. However, regarding the encryption method, giving priority to high security, regardless of the encryption method stored in the wireless slave unit (wireless terminal) to be automatically attributed, Prioritizing the high level of security as the first factor, in descending order of priority, for example, WPA2-PSK AES> WPA-PSK AES> WPA2-PSK TKIP> WPA-PSK TKIP> WEP> No encryption It is desirable to control to set to.

By having the above features, even if a wireless slave unit (wireless terminal) such as a smart phone or tablet belongs to another access point, the access point or target with the automatic connection function according to the present invention. The user of the wireless slave unit does not need to perform any operation, and without any consciousness, cancels the attribution with other access points to which the wireless slave unit has belonged so far, and automatically connects according to the present invention. It is possible to automatically attribute to an access point with a function.

Therefore, even a user with low literacy does not have to manually set the SSID, encryption method, and encryption key to the access point with the automatic connection function according to the present invention, such as a wireless handset such as a smartphone or tablet. The effect of being able to automatically connect (wireless terminal) can be expected.

In addition to the main features described above, the profile of a wireless handset (wireless terminal) such as a smartphone or tablet that is approaching by changing the SSID, encryption method, and encryption key of the own access point. When it operates to match the information, the result of whether or not it matches the profile information of the wireless slave unit (wireless terminal) is posted on the Web GUI (Graphical User Interface), that is, the Web page of the Internet. The access point with the automatic connection function according to the present invention and the user of the target wireless slave unit (wireless terminal) may be allowed to browse.

The features of the present invention will be described in more detail as follows. First, the present invention detects whether or not a wireless slave unit (wireless terminal) such as a smartphone or tablet belonging to another access point exists in the vicinity of the access point with the automatic connection function according to the present invention. It can be clarified by searching the surrounding wireless status with the access point with the automatic connection function.

However, the detection that the wireless slave unit (wireless terminal) is approaching the access point with the automatic connection function according to the present invention exists in the wireless I / F (interface) of the own access point or in the vicinity of the own access point. If the radio wave strength, that is, the received signal strength indicator (RSSI) at the other access point is measured and the measured radio wave strength is not analyzed, the wireless slave unit (wireless terminal) is approaching or moving away. It is not possible to clarify whether it is.

Therefore, in the access point with the automatic connection function according to the present invention, the radio wave strength for measuring the radio wave strength of the wireless I / F (interface) of the own access point and other access points existing in the vicinity of the own access point is measured. It has a determination means. Then, the access point with the automatic connection function according to the present invention determines the intensity level of the radio wave intensity for each frequency band and each bandwidth that can be used for the access point based on the measured radio wave intensity. By referring to the radio wave intensity determination table set and registered in advance (a specific table configuration example will be described later as Table 1), the measured intensity level of the radio wave intensity belongs to any of the three stages of strong / medium / weak. Determine if there is. Then, as a result of periodically repeating the measurement of the measured radio wave intensity at predetermined intervals, the intensity level of the radio wave intensity measured in each cycle changes in time series from weak radio wave to medium radio wave to strong radio wave. Determine if it has been done.

Then, the access point with the automatic connection function according to the present invention belongs to another access point only when it is determined that the measured radio wave strength changes in time series from weak radio wave to medium radio wave to strong radio wave. Having a wireless slave unit approach detection means for determining that a possible wireless slave unit (radio terminal) is approaching an access point with an automatic connection function according to the present invention. It is a major feature. The radio wave strength determination table described above is set and held in advance in the access point with the automatic connection function according to the present invention.

When the access point with the automatic connection function according to the present invention detects that a wireless slave unit (wireless terminal) such as a smartphone or tablet belonging to another access point is approaching, the wireless slave unit In order to cancel the attribution of the (wireless terminal) to another access point, usually, by transmitting a deauthentication (DeAuthentication) frame from the access point with the automatic connection function according to the present invention, a smartphone, a tablet, etc. It is possible to disconnect the communication with the wireless slave unit (wireless terminal) of. In addition, by transmitting a disassociated frame from a wireless slave unit (wireless terminal) such as a smartphone or tablet, it is possible to disconnect communication with another access point belonging to, for example.

However, even if you use a normal DeAuthentication frame that requires you to set information on the frequency band and bandwidth used between the target wireless handset and other access points, the target wireless handset The attribution of the wireless slave unit (wireless terminal) cannot be canceled from the access point to which the aircraft does not belong. Therefore, in the present invention, attribution release frames are burst-transmitted for all bands of 2.4 GHz and 5 GHz with a frame burst time of 0 msec to attribute the wireless slave unit (wireless terminal) from an access point that does not belong. One of the features is that it has a means to release the attribution of the wireless slave unit to be released.

When performing burst transmission, burst transmission is performed from an access point that does not belong to the same frequency band and channel (ch) or bandwidth (bandwidth) as the belonging access point. Only, it is possible to cancel the attribution with the access point that is being attributed.

However, if there are multiple frequency bands and channels (ch) or bandwidths around an unattributable access point, the frequency band and channel (ch) or bandwidth (bandwidth) of the access point for which you want to unattribution. ) Cannot be determined.

Therefore, in the access point with the automatic connection function according to the present invention, for all frequency bands and all bands (all channels (ch)) that can be used for the access point, that is, 2.4 GHz 1 ch to 14ch, 5GHz W52 (36ch, 40ch, 44ch, 48ch), W53 (52ch, 56ch, 60ch, 64ch), W56 (100ch, 104ch, 108ch, 112ch, 116ch, 120ch, 124ch, 128ch, 132ch, 136ch, 140ch, 144ch By burst-transmitting the unassigned frame with a frame burst time of 0 msec for each of), the wireless slave unit (wireless terminal) without determining the frequency band and channel (ch) used by the target access point. The wireless slave unit (wireless terminal) is provided with a means for forcibly disconnecting the communication with the wireless slave unit (radio terminal) as the wireless slave unit attribution canceling means.

To newly attribute a wireless slave unit (wireless terminal) such as a smartphone or tablet that does not belong to an access point, the SSID, encryption method, and encryption of the access point to which the wireless slave unit (wireless terminal) belongs By entering the encryption key, it can be assigned to the access point to which it belongs.

However, in general, it is not possible to set the same SSID, encryption method, and encryption key as the wireless profile information stored in the wireless slave unit (wireless terminal) such as a smartphone or tablet in the access point.

Therefore, in the present invention, an access point with an automatic connection function can variably control the SSID, encryption method, and encryption key of the own access point, thereby enabling a wireless device such as a smart phone or a tablet. Set the SSID, encryption method and encryption key of your access point to the same SSID, encryption method and encryption key as the wireless profile information stored in the machine (wireless terminal), and set the wireless slave unit (wireless terminal). ) Is one of the main features of having a wireless slave unit connection means that belongs to the own access point.

In the present invention, it is desirable that the SSID and the encryption key are only half-width alphanumeric characters in order to efficiently perform the operation of variably controlling the SSID, the encryption method and the encryption key of the access point. In addition, the variably controlled encryption method is, for example, WPA2-PSK, in order of high security, regardless of the encryption method stored in the wireless terminal to be automatically attributed. It is desirable to set in the order of AES> WPA-PSK AES> WPA2-PSK TKIP> WPA-PSK TKIP> WEP> no encryption.

With the above features, in the present invention, a wireless slave unit (wireless terminal) such as a smart phone or tablet belonging to another access point approaches the access point with the automatic connection function according to the present invention. When it arrives, it first releases the attribution of the wireless slave unit (wireless terminal) to another access point by performing burst transmission of the attribution cancellation frame. After that, the SSID, encryption method, and encryption key of the access point with the automatic connection function according to the invention are changed to match the profile information stored in the wireless slave unit (wireless terminal). Can be done.

Therefore, in the present invention, the wireless slave unit (wireless terminal) approaching the access point with the automatic connection function according to the present invention is automatically assigned to the access point with the automatic connection function, and the wireless slave is used. It is possible to surely shift to a connection state in which the machine (wireless terminal) and the access point with the automatic connection function can communicate with each other.

(Structure Example of Embodiment of this Invention)
Next, a configuration example of the access point according to the embodiment of the present invention will be described in detail with reference to the drawings shown in FIGS. 1 to 3.

First, FIG. 1 is a block configuration diagram showing an example of the overall configuration of the access point according to the present invention, and the access point is a wireless handset approaching the own access point (as will be described in detail below). It has an automatic connection function that automatically sets the connection with the wireless terminal).

The access point (AP) 25 with an automatic connection function shown in FIG. 1 has 24 wireless I / Fs (interfaces) 1 to wireless I / F 24, and any one of the wireless I / Fs. For example, the radio I / F 26 in another access point (AP) 27 is connected via the 17th radio I / F 17. Further, the wireless slave unit 29 having the wireless I / F 28 belongs to the other access point 27. The access point 25 surrounded by the broken line frame indicates the scope of the present invention as an access point with an automatic connection function. Here, the other access point 27 is an access point that exists in the vicinity of the access point 25, and exists in the wireless communication area of the access point 25. Then, in FIG. 1, the wireless slave unit 29 belongs to the other access point 27 and is connected to the other access point 27, but does not belong to the access point 25. is there.

Further, the access point 25, as a means for automatically connecting the wireless slave unit 29, has a radio wave strength determination table 30, a radio wave strength determination unit 31, a wireless slave unit approach detection unit 32, and a wireless slave unit attribution cancellation. It has a unit 33 and a wireless slave unit connection unit 34.

The radio wave intensity determination table 30 is a table for determining the intensity level of the radio wave intensity as a wireless environment around the access point 25, and is classified by each frequency band and each bandwidth that can be used for the access point. Then, it is a table for setting and registering in advance which of the three strength levels of strong / medium / weak radio waves belongs to. That is, as shown in Table 1 below, the radio wave strength determination table 30 has a radio wave strength / medium / as the radio field strength intensity level for each frequency band and each bandwidth (bandwidth) that can be used for the access point. The radio field intensity (RSSI) threshold for classifying into three weak levels is set and registered in advance. Then, based on the measurement results of the radio wave intensity (RSSI) at the wireless I / F1 to the wireless I / F24 of the access point 25 and other access points 27 existing around the access point 25, the radio wave intensity determination table 30 is displayed. By reference, the radio field strength (RSSI) from the radio slave unit 29, which may belong to another access point 27 existing around the access point 25, has three levels of strong / medium / weak. It is a table for searching which strength level is.

The radio field strength determination unit 31 measures the radio field strength (RSSI) of the radio I / F1 to the radio I / F24 of the access point 25 and other access points 27 existing in the vicinity of the access point 25 at a predetermined cycle. Each time it is acquired, the radio wave intensity determination table 30 is searched based on the acquired radio wave intensity (RSSI). Then, based on the search result, the frequency band of the radio wave intensity and the intensity level in the bandwidth of the wireless I / F1 to the wireless I / F24 of the access point 25 and other access points 27 existing in the vicinity of the access point 25 are determined. , It is determined which of the three strength levels of strong / medium / weak radio waves belongs to.

Further, the wireless slave unit approach detection unit 32 detects that the wireless slave unit 29 is approaching the own access point 25 based on the result of acquiring the radio wave strength around the own access point 25. That is, it is detected that the intensity level of the radio wave intensity in the radio I / F1 to the radio I / F24 of the other access point 27 or the own access point 25 changes in time series from'weak'to'medium' to'strong'. By doing so, it is detected that the radio handset 29 belonging to another access point 27 or not belonging to any access point is approaching the access point 25.

Further, when the wireless slave unit de-attribution unit 33 detects that the wireless slave unit 29 is approaching the own access point 25, the wireless slave unit 29 does not belong to any of the other access points. Forcibly set to the state. That is, when the wireless slave unit approach detection unit 32 detects that the wireless slave unit 29 is in a state of approaching the access point 25, the entire frequency band 2.4 GHz and 5 GHz that can be used for the access point By performing burst transmission of the unattribution frame for all bands (all channels (ch)) with a frame burst time of 0 msec, when the radio slave unit 29 has been attributed to another access point 27 until now. The state of belonging to the other access point 27 is forcibly released.

Further, the wireless slave unit connection unit 34 sets the wireless slave unit 29 to a state in which it does not belong to any of the other access points, and then sets the SSID (Service Set Identifier), encryption method, and encryption of the own access point 25. By variably controlling the conversion key and matching it with the profile information stored in the wireless slave unit 29, the wireless slave unit 29 is assigned to the own access point 25, and the wireless slave unit 29 is assigned to the own access point. Connect to 25. That is, the profile information stored in the wireless slave unit 29, which is in a state of not belonging to any access point by canceling the attribution state with the other access point 27 in the wireless slave unit attribution release unit 33. By setting the SSID, encryption method, and encryption key of the own access point 25 to the same SSID, encryption method, and encryption key as above, the wireless slave unit 29 is automatically assigned to the own access point 25. It shifts to a connection state that enables communication with the own access point 25.

In the present embodiment, as described above, it is possible to variably control the SSID, encryption method, and encryption key of the own access point 25. Here, in order to efficiently perform the operation when changing the SSID, the encryption method, and the encryption key of the access point, it is desirable that the SSID and the encryption key use only half-width alphanumeric characters. Further, regarding the encryption method that is variably controlled, regardless of the encryption method stored in the wireless slave unit 29 that is to be automatically assigned, for example, in the order of high security. It is possible to set in the order of WPA2-PSK AES> WPA-PSK AES> WPA2-PSK TKIP> WPA-PSK TKIP> WEP> no encryption.

Next, the channel frequency band and bandwidth (HT20 and HT40) used by the access point 25 shown in FIG. 1 in the 2.4 GHz band will be described with reference to FIG. FIG. 2 is an explanatory diagram schematically showing a channel frequency band and bandwidth (HT20 and HT40) used by the access point 25 of FIG. 1 in the frequency band of 2.4 GHz.

As shown in FIG. 2, in the 2.4 GHz band, which is a frequency band that can be used for an access point, one channel (20 MHz bandwidth) is used as the bandwidth to be used among the 14 channels of 1ch to 14ch. ) Unit HT 20 (High Throughput 20) and HT 40 (High Throughput 40) allocated in units of two adjacent channels (40 MHz bandwidth) by channel bonding are used. When using at the same time, it is necessary to allocate the number of channels so that they do not overlap each other. In the example shown in FIG. 2, the number of bandwidths that can be used at the same time is 4 for HT20 and 2 for HT40. It shows the case where it is restricted.

Next, the channel frequency band and bandwidth (VHT20, VHT40, and VHT80) used by the access point 25 shown in FIG. 1 in the frequency band of 5 GHz will be described with reference to FIG. FIG. 3 is an explanatory diagram schematically showing a channel frequency band and bandwidth (VHT20, VHT40, and VHT80) used by the access point 25 of FIG. 1 in the frequency band of 5 GHz.

As shown in FIG. 3, in the frequency band 5 GHz band that can be used for an access point, W52 (36ch, 40ch, 44ch, 48ch), W53 (52ch, 56ch, 60ch, 64ch), W56 (100ch, Of the 20 channels of 104ch, 108ch, 112ch, 116ch, 120ch, 124ch, 128ch, 132ch, 136ch, 140ch, 144ch), VHT20 (Very) allocated in units of 1 channel (20MHz bandwidth) as the bandwidth to be used. High Throughput 20), VHT 40 (Very High Throughput 40) allocated in units of 2 adjacent channels (bandwidth of 40 MHz) by channel bonding, VHT 80 (Very High Throughput 80) allocated in units of 4 adjacent channels (bandwidth of 80 MHz) Each of is used.

The frequency band 5 GHz of this embodiment is not shown in FIG. 3 because it has not been commercialized yet, but as an option to be put into practical use in the future, there are eight adjacent channels (160 MHz band). It may be possible in the future to also use VHT160, which allocates width) or VHT80 + 80, which allocates four adjacent channels (bandwidth of 80 MHz) in units of two.

(Operation example of the embodiment of the present invention)
Next, an example of the operation of the access point 25 shown in FIG. 1 as an embodiment of the present invention will be described below. As described above, in the access point 25 shown in FIG. 1, the wireless slave unit 29, which may belong to another access point 27 located in the vicinity of the own access point 25, becomes the access point 25. When it detects that it is approaching, it has a function of automatically assigning it to its own access point 25 and connecting to it after canceling the state of belonging to the other access point 27 of the wireless slave unit 29. It is an access point with a connection function.

First, the access point 25 shown in FIG. 1 is used as an example of the operation of the first half of the radio field strength determination unit 31 at another access point 27 connected via, for example, the 17th radio I / F17. An operation example for discriminating the frequency band and the bandwidth will be described with reference to the flowchart of FIG. FIG. 4 is a flowchart showing an example of an operation for determining the frequency band and bandwidth (bandwidth) used in another access point 27 to which the access point 25 of FIG. 1 is connected via the wireless I / F17. Is.

Here, the other access point 27 is located in the wireless communicable area of the access point 25 around the access point 25, exists in the wireless communicable area of the access point 25, and is shown in FIG. As described above, it is assumed that the wireless slave unit 29 is in a state of belonging. The access point 25 also determines the frequency band and bandwidth used in the radio I / F1 to the radio I / F24 of the own access point 25 as the operation of the first half of the radio wave strength determination unit 31. However, in the description of the flowchart of FIG. 4, the description of the discrimination operation in the radio I / F1 to the radio I / F24 of the own access point 25 is omitted in order to simplify the description.

In the flowchart of FIG. 4, first, the access point 25 activates an operation of searching the radio condition around the own access point 25 (step S1). Then, the radio frequency band / bandwidth used by the other access points 27 existing around the own access point 25 is collected as the variable n (step S2). Next, it is confirmed whether or not the bandwidth of 2.4 GHz HT20 is collected as the variable n (step S3). When the bandwidth of 2.4 GHz HT20 is collected as the variable n (Yes in step S3), it is determined that the frequency band used by the other access point 27 is 2.4 GHz HT20, and the figure shows. The operation of the flowchart of 4 is terminated. That is, in such a case, the access point 25 is a wireless slave unit to which another access point 27 connected via the wireless I / F 17 uses the frequency band / bandwidth of 2.4 GHz HT20. Detects that it is connected to 29.

If the bandwidth of 2.4 GHz HT20 has not been collected as the variable n (No in step S3), then it is confirmed whether or not the bandwidth of 2.4 GHz HT40 has been collected as the variable n (No in step S3). Step S4). When the bandwidth of 2.4 GHz HT40 is collected as the variable n (Yes in step S4), it is determined that the frequency band used in the other access point 27 is 2.4 GHz HT40, and the figure shows. The operation of the flowchart of 4 is terminated.

If the bandwidth of 2.4 GHz HT40 has not been collected as the variable n (No in step S4), then it is confirmed whether or not the bandwidth of 5 GHz VHT20 has been collected as the variable n (step S5). ). When the bandwidth of 5 GHz VHT 20 is collected as the variable n (Yes in step S5), it is determined that the frequency band used by the other access point 27 is 5 GHz VHT 20, and the flowchart of FIG. 4 shows. End the operation.

If the bandwidth of 5 GHz VHT 20 has not been collected as the variable n (No in step S5), then it is confirmed whether or not the bandwidth of 5 GHz VHT 40 has been collected as the variable n (step S6). When the bandwidth of 5 GHz VHT 40 is collected as the variable n (Yes in step S6), it is determined that the frequency band used by the other access point 27 is 5 GHz VHT 40, and the flowchart of FIG. 4 shows. End the operation.

When the bandwidth of 5 GHz VHT40 has not been collected as the variable n (No in step S6), finally, it is confirmed whether or not the bandwidth of 5 GHz VHT80 has been collected as the variable n (step S7). When the bandwidth of 5 GHz VHT80 is collected as the variable n (Yes in step S7), it is determined that the frequency band used by the other access point 27 is 5 GHz VHT80, and the flowchart of FIG. 4 shows. End the operation.

If the bandwidth of 5 GHz VHT80 has not been collected as the variable n (No in step S7), the process returns to step S2 and the radio frequency band / bandwidth existing around the own access point 25 is collected as the variable n. Repeat the operation to do.

Next, an example of the determination operation of the intensity level of the radio wave intensity in the latter half of the radio wave intensity determination unit 31 of the access point 25 shown in FIG. 1 will be sequentially described with reference to the flowcharts of FIGS. 5 to 9. Also in the following description, as in the case of the description of the flowchart of FIG. 4, in order to simplify the description, the frequencies used in the radio I / F1 to the radio I / F24 of the access point 25 of FIG. 1 The description of the operation of determining the intensity level of the radio wave intensity regarding the band and the bandwidth (bandwidth) is omitted, and the access point 25 of FIG. 1 is used in another access point 27 connected via the wireless I / F17. An example of an operation for determining the intensity level of the radio wave intensity with respect to the frequency band and the bandwidth (bandwidth) being set will be described.

First, in step S3 of the flowchart of FIG. 4, the frequency band and bandwidth (bandwidth) used by the access point 25 of FIG. 1 at another access point 27 connected via the radio I / F 17 are determined. Measurement of the radio wave intensity (RSSI) of the 2.4 GHz HT20 used in another access point 27 as an example of the operation of the latter half of the radio wave strength determination unit 31 when it is detected to be 2.4 GHz HT20. An example of an operation of acquiring the result and determining whether the radio wave intensity is strong / medium / weak will be described with reference to the flowchart of FIG.

FIG. 5 shows the case where the access point 25 of FIG. 1 detects that the frequency band and bandwidth (bandwidth) used by the other access points 27 located in the vicinity are 2.4 GHz HT20. It is a flowchart which shows an example of the operation which determines whether the radio wave strength (RSSI) of 2.4GHz HT20 used in the access point 27 is strong / medium / weak. When determining whether the radio field intensity (RSSI) is strong / medium / weak, the access point 25 refers to the radio field strength determination table 30 described above as Table 1 to display the 2.4 GHz HT 20. Determine whether the radio field strength (RSSI) is strong / medium / weak.

In the flowchart of FIG. 5, first, the access point 25 detects that the other access points 27 existing around the own access point 25 are using the frequency band / bandwidth 2.4 GHz HT20 in the flowchart of FIG. At that time, the measurement result of the radio wave intensity at the other access point 27 of the frequency band / bandwidth 2.4 GHz HT 20 is acquired (step S11). Then, the measurement result of the radio wave intensity at the acquired other access point 27 of the frequency band / bandwidth 2.4 GHz HT20 is set as the variable RSSIn (step S12).

Next, the variable RSSIn indicating the measurement result is compared with the radio field intensity (RSSI) threshold value in the 2.4 GHz HT20 set and registered in the radio wave intensity determination table 30 in Table 1. First, it is confirmed whether or not the value of the variable RSSIn of the measurement result is equal to or higher than the radio wave intensity (RSSI) threshold value of ‘28 dBm’ for determining that the intensity level is ‘strong’ (step S13). When the value of the variable RSSIn of the measurement result is '28 dBm' or more (Yes in step S13), it is set that the value of the variable RSSIn of the measurement result is the radio field intensity'strong' (step S14). The operation of the flowchart of FIG. 5 ends.

If the value of the variable RSSIn of the measurement result is not greater than or equal to '28 dBm' (No in step S13), then the radio field intensity for determining that the value of the variable RSSIn of the measurement result is the intensity level'weak' (RSSI) It is confirmed whether or not it is equal to or less than the threshold value '17 dBm' (step S15). When the value of the variable RSSIn of the measurement result is '17 dBm' or less (Yes in step S15), the value of the variable RSSIn of the measurement result is set to be'weak' in the radio field intensity (step S16). The operation of the flowchart of FIG. 5 ends.

When the value of the variable RSSIn of the measurement result is not less than or equal to '17 dBm' (No in step S15), it is set that the value of the variable RSSIn of the measurement result is'medium' in the radio field intensity (step S17). The operation of the flowchart of FIG. 5 ends.

By repeating the determination process of the radio wave intensity (RSSI) in FIG. 5 as described above, the intensity level of the measurement result variable RSSIn in the frequency band / bandwidth 2.4 GHz HT20 becomes'weak'→'medium' →'strong'. When it is detected that the access point 25 is changing in time series, the access point 25 is a radio wave element belonging to another access point 27 located in the vicinity of the own access point 25 in the radio wave slave unit approach detection unit 32. It can be determined that the machine 29 is approaching not only the other access point 27 but also the own access point 25.

Next, in step S4 of the flowchart of FIG. 4, the frequency band and bandwidth (bandwidth) used in the other access point 27 to which the access point 25 of FIG. 1 is connected via the radio I / F17. When it is detected that is 2.4 GHz HT40, as an example of the operation of the latter half of the radio field intensity determination unit 31, the radio wave intensity (RSSI) of the 2.4 GHz HT40 used in the other access point 27 An example of the operation of acquiring the measurement result and determining whether the radio wave intensity is strong / medium / weak will be described with reference to the flowchart of FIG.

FIG. 6 shows the case where the access point 25 of FIG. 1 detects that the frequency band and bandwidth (bandwidth) used by the other access points 27 located in the vicinity are 2.4 GHz HT40. It is a flowchart which shows an example of the operation which determines whether the radio wave strength (RSSI) of 2.4GHz HT40 used in the access point 27 is strong / medium / weak. When determining whether the radio field intensity (RSSI) is strong / medium / weak, the access point 25 refers to the radio field strength determination table 30 described above as Table 1 as in the case of FIG. Determines whether the radio field strength (RSSI) of the 2.4 GHz HT40 is strong / medium / weak. The operation of the flowchart of FIG. 6 is exactly the same as that of the flowchart of FIG. 5, except that the frequency band and the bandwidth (bandwidth) are 2.4 GHz HT40.

In the flowchart of FIG. 6, first, the access point 25 detects that another access point 27 existing around the own access point 25 uses the frequency band / bandwidth 2.4 GHz HT40 in the flowchart of FIG. At that time, the measurement result of the radio wave intensity at the other access point 27 of the frequency band / bandwidth 2.4 GHz HT40 is acquired (step S21). Then, the measurement result of the radio wave intensity at the other access point 27 of the acquired frequency band / bandwidth 2.4 GHz HT40 is set as the variable RSSIn (step S22).

Next, the variable RSSIn indicating the measurement result is compared with the radio field intensity (RSSI) threshold value in the 2.4 GHz HT40 set and registered in the radio wave intensity determination table 30 in Table 1. First, it is confirmed whether or not the value of the variable RSSIn of the measurement result is equal to or higher than the radio wave intensity (RSSI) threshold value ‘19 dBm’ for determining that the intensity level is ‘strong’ (step S23). When the value of the variable RSSIn of the measurement result is '19 dBm' or more (Yes in step S23), it is set that the value of the variable RSSIn of the measurement result is the radio field intensity'strong' (step S24). The operation of the flowchart of FIG. 6 ends.

If the value of the variable RSSIn of the measurement result is not greater than or equal to '19 dBm' (No in step S23), then the radio field strength for determining that the value of the variable RSSIn of the measurement result is the intensity level'weak' (RSSI) It is confirmed whether or not it is equal to or less than the threshold value '14 dBm' (step S25). When the value of the variable RSSIn of the measurement result is '14 dBm' or less (Yes in step S25), it is set that the value of the variable RSSIn of the measurement result is the radio field intensity'weak' (step S26). The operation of the flowchart of FIG. 6 ends.

When the value of the variable RSSIn of the measurement result is not less than or equal to '14 dBm' (No in step S25), it is set that the value of the variable RSSIn of the measurement result is'medium' in the radio field intensity (step S27). The operation of the flowchart of FIG. 6 ends.

By repeating the determination process of the radio wave intensity (RSSI) of FIG. 6 as described above, the intensity level of the measurement result variable RSSIn in the frequency band / bandwidth 2.4 GHz HT40 becomes'weak'→'medium' →'strong'. When it is detected that the access point 25 is changing in time series, the access point 25 is a radio wave element belonging to another access point 27 located in the vicinity of the own access point 25 in the radio wave slave unit approach detection unit 32. It can be determined that the machine 29 is approaching not only the other access point 27 but also the own access point 25.

Next, in step S5 of the flowchart of FIG. 4, the frequency band and bandwidth (bandwidth) used in the other access point 27 to which the access point 25 of FIG. 1 is connected via the radio I / F17. When it is detected that is 5 GHz VHT 20, as an example of the operation of the latter half of the radio wave intensity determination unit 31, the measurement result of the radio wave intensity (RSSI) of the 5 GHz VHT 20 used in the other access point 27 is acquired. An example of the operation of determining whether the radio wave intensity is strong / medium / weak will be described with reference to the flowchart of FIG. 7.

FIG. 7 shows another access when the access point 25 of FIG. 1 detects that the frequency band and bandwidth (bandwidth) used by the other access points 27 located in the vicinity are 5 GHz VHT 20. It is a flowchart which shows an example of the operation which determines whether the radio field strength (RSSI) of 5GHz VHT20 used at point 27 is strong / medium / weak. When determining whether the radio field intensity (RSSI) is strong / medium / weak, the access point 25 refers to the radio field strength determination table 30 described above as Table 1 as in the case of FIG. Determines whether the radio field intensity (RSSI) of the 5 GHz VHT 20 is strong / medium / weak. The operation of the flowchart of FIG. 7 is exactly the same as that of the flowchart of FIG. 5, except that the frequency band and the bandwidth (bandwidth) are 5 GHz VHT20.

In the flowchart of FIG. 7, first, the access point 25 detects that the other access points 27 existing around the own access point 25 in the flow chart of FIG. 4 is using the frequency band, bandwidth 5 GHz VHT20 At that time, the measurement result of the radio wave intensity at the other access point 27 of the frequency band / bandwidth 5 GHz VHT 20 is acquired (step S31). Then, the measurement result of the radio wave intensity at the acquired other access point 27 of the frequency band / bandwidth 5 GHz VHT 20 is set as the variable RSSIn (step S32).

Next, the variable RSSIn indicating the measurement result is compared with the radio field intensity (RSSI) threshold value in the 5 GHz VHT 20 set and registered in the radio wave intensity determination table 30 in Table 1. First, it is confirmed whether or not the value of the variable RSSIn of the measurement result is equal to or higher than the radio wave intensity (RSSI) threshold value ‘21 dBm’ for determining that the intensity level is ‘strong’ (step S33). When the value of the variable RSSIn of the measurement result is '21 dBm' or more (Yes in step S33), it is set that the value of the variable RSSIn of the measurement result is the radio field intensity'strong' (step S34). The operation of the flowchart of FIG. 7 ends.

If the value of the variable RSSIn of the measurement result is not greater than or equal to '21 dBm' (No in step S33), then the radio field strength for determining that the value of the variable RSSIn of the measurement result is the intensity level'weak' (RSSI) It is confirmed whether or not it is equal to or less than the threshold value '14 dBm' (step S35). When the value of the variable RSSIn of the measurement result is '14 dBm' or less (Yes in step S35), the value of the variable RSSIn of the measurement result is set to be'weak' in the radio field intensity (step S36). The operation of the flowchart of FIG. 7 ends.

If the value of the variable RSSIn of the measurement result is not less than or equal to '14 dBm' (No in step S35), the value of the variable RSSIn of the measurement result is set to be'medium' in the radio field intensity (step S37). The operation of the flowchart of FIG. 7 ends.

By repeating the determination process of the radio wave intensity (RSSI) of FIG. 7 as described above, the intensity level of the measurement result variable RSSIn in the frequency band / bandwidth 5 GHz VHT20 becomes'weak'→'medium' →'strong'. When it is detected that the access points are changing in sequence, the access point 25 is assigned to another access point 27 located in the vicinity of the own access point 25 in the wireless slave unit approach detection unit 32. However, it can be determined that the user is approaching not only the other access point 27 but also the own access point 25.

Next, in step S6 of the flowchart of FIG. 4, the frequency band and bandwidth (bandwidth) used in the other access point 27 to which the access point 25 of FIG. 1 is connected via the radio I / F17. When it is detected that is 5 GHz VHT 40, as an example of the operation of the latter half of the radio wave intensity determination unit 31, the measurement result of the radio wave intensity (RSSI) of the 5 GHz VHT 40 used in the other access point 27 is acquired. Then, an operation of determining whether the radio wave intensity is strong / medium / weak will be described with reference to the flowchart of FIG.

FIG. 8 shows another access when the access point 25 of FIG. 1 detects that the frequency band and bandwidth (bandwidth) used by the other access points 27 located in the vicinity are 5 GHz VHT 40. It is a flowchart which shows an example of the operation which determines whether the radio field strength (RSSI) of 5GHz VHT40 used at point 27 is strong / medium / weak. When determining whether the radio field intensity (RSSI) is strong / medium / weak, the access point 25 refers to the radio field strength determination table 30 described above as Table 1 as in the case of FIG. Determines whether the radio field intensity (RSSI) of the 5 GHz VHT 40 is strong / medium / weak. The operation of the flowchart of FIG. 8 is exactly the same as that of the flowchart of FIG. 5, except that the frequency band and the bandwidth (bandwidth) are 5 GHz VHT40.

In the flowchart of FIG. 8, first, when the access point 25 detects in the flowchart of FIG. 4 that another access point 27 existing around the own access point 25 uses the frequency band / bandwidth 5 GHz VHT 40. In addition, the measurement result of the radio wave intensity at the other access point 27 of the frequency band / bandwidth 5 GHz VHT 40 is acquired (step S41). Then, the measurement result of the radio wave intensity at the other access point 27 of the acquired frequency band / bandwidth 5 GHz VHT 40 is set as the variable RSSIn (step S42).

Next, the variable RSSIn indicating the measurement result is compared with the radio field intensity (RSSI) threshold value in the 5 GHz VHT 40 set and registered in the radio wave intensity determination table 30 in Table 1. First, it is confirmed whether or not the value of the variable RSSIn of the measurement result is equal to or higher than the radio wave intensity (RSSI) threshold value of ‘20 dBm’ for determining that the intensity level is ‘strong’ (step S43). When the value of the variable RSSIn of the measurement result is '20 dBm' or more (Yes in step S43), it is set that the value of the variable RSSIn of the measurement result is the radio field intensity'strong' (step S44). The operation of the flowchart of FIG. 8 ends.

If the value of the variable RSSIn of the measurement result is not greater than or equal to '20 dBm' (No in step S43), then the radio field intensity for determining that the value of the variable RSSIn of the measurement result is the intensity level'weak' (RSSI) It is confirmed whether or not it is equal to or less than the threshold value '14 dBm' (step S45). When the value of the variable RSSIn of the measurement result is '14 dBm' or less (Yes in step S45), it is set that the value of the variable RSSIn of the measurement result is the radio field intensity'weak' (step S46). The operation of the flowchart of FIG. 8 ends.

When the value of the variable RSSIn of the measurement result is not less than or equal to '14 dBm' (No in step S45), it is set that the value of the variable RSSIn of the measurement result is'medium' in the radio field intensity (step S47). The operation of the flowchart of FIG. 8 ends.

By repeating the determination process of the radio wave intensity (RSSI) in FIG. 8 as described above, the intensity level of the measurement result variable RSSIn in the frequency band / bandwidth 5 GHz VHT40 becomes'weak'→'medium' →'strong'. When it is detected that the access points are changing in sequence, the access point 25 is assigned to another access point 27 located in the vicinity of the own access point 25 in the wireless slave unit approach detection unit 32. However, it can be determined that the user is approaching not only the other access point 27 but also the own access point 25.

Next, in step S7 of the flowchart of FIG. 4, the frequency band and bandwidth (bandwidth) used in the other access point 27 to which the access point 25 of FIG. 1 is connected via the radio I / F17. When it is detected that is 5 GHz VHT80, as an example of the operation of the latter half of the radio field strength determination unit 31, the measurement result of the radio wave strength (RSSI) of the 5 GHz VHT80 used in the other access point 27 is acquired. Then, an operation of determining whether the radio wave intensity is strong / medium / weak will be described with reference to the flowchart of FIG.

FIG. 9 shows another access when the access point 25 of FIG. 1 detects that the frequency band and bandwidth (bandwidth) used by the other access points 27 located in the vicinity are 5 GHz VHT80. It is a flowchart which shows an example of the operation which determines whether the radio field strength (RSSI) of 5GHz VHT80 used at point 27 is strong / medium / weak. When determining whether the radio field intensity (RSSI) is strong / medium / weak, the access point 25 refers to the radio field strength determination table 30 described above as Table 1 as in the case of FIG. Determines whether the radio field intensity (RSSI) of the 5 GHz VHT80 is strong / medium / weak. The operation of the flowchart of FIG. 9 is exactly the same as that of the flowchart of FIG. 5, except that the frequency band and the bandwidth (bandwidth) are 5 GHz VHT80.

In the flowchart of FIG. 9, first, when the access point 25 detects in the flowchart of FIG. 4 that another access point 27 existing around the own access point 25 uses the frequency band / bandwidth 5 GHz VHT80. In addition, the measurement result of the radio wave intensity in the other 27 of the frequency band / bandwidth 5 GHz VHT80 is acquired (step S51). Then, the measurement result of the radio wave intensity at the acquired other access point 27 of the frequency band / bandwidth 5 GHz VHT80 is set as the variable RSSIn (step S52).

Next, the variable RSSIn indicating the measurement result is compared with the radio field intensity (RSSI) threshold value in the 5 GHz VHT80 set and registered in the radio wave intensity determination table 30 in Table 1. First, it is confirmed whether or not the value of the variable RSSIn of the measurement result is equal to or higher than the radio wave intensity (RSSI) threshold value ‘18 dBm’ for determining that the intensity level is ‘strong’ (step S53). When the value of the variable RSSIn of the measurement result is '18 dBm' or more (Yes in step S53), it is set that the value of the variable RSSIn of the measurement result is the radio field intensity'strong' (step S54). The operation of the flowchart of FIG. 9 ends.

If the value of the variable RSSIn of the measurement result is not greater than or equal to '18 dBm' (No in step S53), then the radio field intensity for determining that the value of the variable RSSIn of the measurement result is the intensity level'weak' (RSSI) It is confirmed whether or not it is equal to or less than the threshold value '13 dBm' (step S55). When the value of the variable RSSIn of the measurement result is '13 dBm' or less (Yes in step S55), it is set that the value of the variable RSSIn of the measurement result is the radio field intensity'weak' (step S56). The operation of the flowchart of FIG. 9 ends.

When the value of the variable RSSIn of the measurement result is not less than or equal to '13 dBm' (No in step S55), it is set that the value of the variable RSSIn of the measurement result is'medium' in the radio field intensity (step S57). The operation of the flowchart of FIG. 9 ends.

By repeating the determination process of the radio wave intensity (RSSI) in FIG. 9 as described above, when the intensity level of the measurement result variable RSSIn in the frequency band / bandwidth 5 GHz VHT80 becomes'weak'→'medium' →'strong'. When it is detected that the access points are changing in sequence, the access point 25 is assigned to another access point 27 located in the vicinity of the own access point 25 in the wireless slave unit approach detection unit 32. However, it can be determined that the user is approaching not only the other access point 27 but also the own access point 25.

As described with reference to the flowcharts of FIGS. 5 to 9, the access point 25 of FIG. 1 having a function with an automatic connection function has the intensity of radio wave intensity (RSSI) at other access points 27 located in the vicinity. When it is detected that the level changes in time series from'weak'to'medium' to'strong', the radio slave unit approach detection unit 32 detects the radio wave belonging to another access point 27. It is determined that the machine 29 is approaching not only the other access point 27 but also the own access point 25. It should be noted that the intensity level of the radio field intensity (RSSI) in the radio I / F1 to the radio I / F24 of the access point 25 in FIG. 1 changes in time series from'weak'to'medium' to'strong'. Is also detected, it is determined that the wireless slave unit 29 is approaching the own access point 25 in exactly the same manner.

Then, when the access point 25 detects that the wireless slave unit 29 such as a smartphone or tablet that may belong to the other access point 27 is approaching the own access point 25, the wireless slave The operation shifts to the operation of forcibly canceling the attribution to the other access point 27 of the machine 29. Generally, when a disassociated frame is transmitted from the wireless slave unit 29, communication between the wireless slave unit 29 and another access point 27 can be disconnected, but the wireless slave unit 29 is disconnected in a timely manner. You cannot expect the (DisAssociated) frame to be sent.

Further, by transmitting the deauthentication frame from the other access point 27 as the deauthentication frame, the belonging radio slave unit 29 is released from the attribution, and the other access point 27 and the wireless slave unit 29 are combined. Communication between them can be forcibly disconnected, but it cannot be expected that the deauthentication frame will be transmitted from the other access point 27 in a timely manner.

Further, from the access point 25 to which the wireless slave unit 29 does not belong, as a matter of course, a control frame such as a deauthentication frame is used to ensure that the other access point 27 and the wireless slave unit 29 belong to each other. It cannot be canceled. This is because the access point 25 is in a state where it is possible to reliably grasp the frequency band, channel (ch), and bandwidth used by the other access point 27 to which the wireless slave unit 29 belongs. Only in this case, it is possible to burst-transmit the unassignment frame to the same frequency band and channel (ch) of the frequency band and bandwidth (bandwidth) used by the other access point 27. This is because the state of attribution to the other access point 27 of the wireless slave unit 29 can be released, but there is no guarantee that the frequency band, channel (ch), and bandwidth can be reliably grasped.

For example, if a plurality of frequency bands and channels (ch) or bandwidths (bandwidths) exist in the vicinity of the access point 25 to which the wireless slave unit 29 to be released from attribution does not belong, the attribution occurs. It is not possible to accurately determine the frequency band, channel (ch), and bandwidth (bandwidth) used by the target wireless slave unit 29 to be released from the other access point 27.

Therefore, in the access point 25 with the automatic connection function in the present embodiment, the wireless slave unit 29 that does not belong to the own access point 25 but belongs to other access points 27 existing in the vicinity is the own access point 25. For all frequency bands and all bands (all channels (ch)) of 2.4 GHz and 5 GHz that can be used for access points when approaching, that is, 2.4 GHz 1ch to 14ch, 5GHz W52 (36ch, 40ch, 44ch, 48ch), W53 (52ch, 56ch, 60ch, 64ch), W56 (100ch, 104ch, 108ch, 112ch, 116ch, 120ch, 124ch, 128ch, 132ch, 136ch, 140ch, 144ch) By burst transmission of the attribution release frame from the own access point 25 to each of them with a frame burst time of 0 msec, the frequency band and channel used by the other target access points 27 with the wireless slave unit 29. A radio element that forcibly disconnects communication between another access point 27 and the wireless slave unit 29 without determining (ch) or bandwidth (bandwidth), and releases the attribution state of the wireless slave unit 29. It has a machine attribution release unit 33.

That is, burst transmission of the attribution release frame is performed from the access point 25 to which the wireless slave unit 29 does not belong to all frequency bands and all bands (all channels (ch)) that can be used for the access point. Therefore, even if the other access point 27 to which the wireless slave unit 29 belongs does not know the frequency band and channel (ch) or bandwidth used by the wireless slave unit 29, the wireless slave unit 29 For the same frequency band and channel (ch) or bandwidth (bandwidth) as the frequency band and channel (ch) or bandwidth (bandwidth) used by the other access point 27 to which Since the burst transmission of the attribution release frame can be performed, the attribution state to the other access point 27 of the wireless slave unit 29 can be forcibly and surely released.

FIG. 10 is a waveform diagram schematically showing an example of a transmission waveform in which the access point 25 shown in FIG. 1 bursts and transmits an attribution release frame with a frame burst time of less than 4 msec, and the attribution release frame is interrupted for less than 4 msec. It is shown that. On the other hand, FIG. 11 is a waveform diagram schematically showing an example of a transmission waveform in which the access point 25 shown in FIG. 1 bursts and transmits an attribution release frame at a frame burst time of 0 msec, and the attribution release frame is interrupted. It shows that it is transmitted continuously without any problem.

As shown in FIG. 11, by performing burst transmission of attribution release frames for all frequency bands and all bands (all channels (ch)) with a frame burst time of 0 msec, wireless slave units 29 such as smartphones and tablets have been used up to now. Communication with the other access point 27 to which it belongs is immediately disconnected, and the attribution with the other access point 27 to which it has belonged is canceled.

When the wireless slave unit 29 forcibly releases the attribution state with the other access point 27 by the wireless slave unit attribution release unit 33, the access point 25 becomes a state in which it does not belong to any access point. Next, the operation shifts to the operation of assigning the wireless slave unit 29 to the own access point 25.

In order to attribute the wireless slave unit 29 that does not belong to any access point to the own access point 25, the SSID, encryption method, and encryption key of the own access point 25 that is a new attribution destination from the wireless slave unit 29. Can be attributed to the own access point 25 by inputting. However, when the access point 25 is composed of a general access point, the same SSID, encryption method, and encryption key as the wireless profile information stored in the wireless slave unit 29 such as a smartphone or tablet is used. It cannot be set automatically on the access point 25.

Therefore, the access point 25 in this embodiment, as an access point with automatic connection function, the access point 25 SSID, by a configurable to variably control the encryption method and encryption key, the radio Set the SSID, encryption method and encryption key of the own access point 25 to the same SSID, encryption method and encryption key as the wireless profile information stored in the slave unit 29, and set the wireless slave unit 29 to the own access point. It has a wireless slave unit connection unit 34 that is automatically assigned to 25 and makes a connection with the wireless slave unit 29.

That is, when the wireless slave unit 29 belonging to the other access point 27 approaches the access point 25 with the automatic connection function in the present embodiment, the wireless slave unit attribution release unit 33 has a frame burst time. By performing burst transmission of the attribution release frame for the entire band of 2.4 GHz and 5 GHz in 0 msec, the wireless terminal is released from the attribution to the other access point 27 to which the wireless terminal has been assigned, and then the radio element. The machine connection unit 34 performs an operation of variably controlling the SSID, encryption method, and encryption key of the own access point 25, and matches the profile information stored in the wireless slave unit 29 with the own access point. It can be automatically attributed to 25 and connected.

In the access point 25 with the automatic connection function in the present embodiment, the SSID and the encryption are performed in order to efficiently perform the operation when variably controlling the SSID, the encryption method, and the encryption key of the own access point 25. The conversion key is limited to half-width alphanumeric characters.

In addition, regarding the encryption method that is variably controlled, regardless of the encryption method stored in the wireless slave unit 29 that is to be automatically attributed, the figure shows the order of high security. As shown in the flowchart of 12, for example, WPA2-PSK AES> WPA-PSK AES> WPA2-PSK TKIP> WPA-PSK TKIP> WEP> no encryption is set in this order.

FIG. 12 is a flowchart showing an example of an operation when the access point 25 of FIG. 1 sets an encryption method with the newly assigned wireless slave unit 29 at the wireless slave unit connection unit 34, and automatically. An example of prioritizing the encryption method based on the high level of security is shown regardless of the encryption method stored in the wireless slave unit 29 to be attributed.

In the flowchart of FIG. 12, first, as an initial setting, the variable m indicating the number of executions is reset to '0' (step S61), and then the value obtained by adding '1' to the variable m of the number of executions is set in the variable x. (Step S62). Then, it is confirmed whether or not the variable x has reached the upper limit value N of the number of executions (step S63). When the variable x reaches the upper limit value N of the number of executions (Yes in step S63), the setting operation of the encryption method of FIG. 12 ends.

When the variable x does not reach the upper limit value N of the number of executions (No in step S63), is it possible to set the encryption method of the access point 25 in the order of high security? The operation shifts to the operation of determining whether or not. First, it is confirmed whether or not it is in a state where it can be set to WPA2-PSK AES, which has the highest security (step S64). When it is possible to set to WPA2-PSK AES (Yes in step S64), after setting the encryption method of the access point 25 to WPA2-PSK AES, the value of the variable x is the variable of the number of executions. After resetting to m (step S70), the process returns to step S62, and the setting operation of the encryption method is repeated until the upper limit value N of the number of executions is reached.

If it is not in a state where it can be set in WPA2-PSK AES (No in step S64), then whether it is in a state where it can be set in WPA-PSK AES with the next highest security. Is confirmed (step S65). If it is possible to set it to WPA-PSK AES (Yes in step S65), after setting the encryption method of the access point 25 to WPA-PSK AES, the value of the variable x is the variable of the number of executions. The setting operation of the encryption method is repeated until the setting is reset to m (step S70), the process returns to step S62, and the upper limit value N of the number of executions is reached.

If it is not in a state where it can be set in WPA-PSK AES (No in step S65), then whether it is in a state where it can be set in WPA2-PSK TKIP, which has the next highest security. Is confirmed (step S66). When it is possible to set to WPA2-PSK TKIP (Yes in step S66), after setting the encryption method of the access point 25 to WPA2-PSK TKIP, the value of the variable x is the variable of the number of executions. After resetting to m (step S70), the process returns to step S62, and the setting operation of the encryption method is repeated until the upper limit value N of the number of executions is reached.

If it is not in a state where it can be set in WPA2-PSK TKIP (No in step S66), then whether it is in a state where it can be set in WPA-PSK TKIP, which has the next highest security. Is confirmed (step S67). When it is possible to set to WPA-PSK TKIP (Yes in step S67), after setting the encryption method of the access point 25 to WPA-PSK TKIP, the value of the variable x is the variable of the number of executions. After resetting to m (step S70), the process returns to step S62, and the setting operation of the encryption method is repeated until the upper limit value N of the number of executions is reached.

If it is not in a state where it can be set in WPA-PSK TKIP (No in step S67), then check whether it is in a state where it can be set in WEP, which has the next highest security. (Step S68). If it is possible to set it to WEP (Yes in step S68), after setting the encryption method of the access point 25 to WEP, reset the value of the variable x to the variable m of the number of executions. (Step S70), and further returns to step S62, and the setting operation of the encryption method is repeated until the upper limit value N of the number of executions is reached.

If it is not in a state where it can be set in WEP (No in step S68), it is finally confirmed whether or not it is in a state where it can be set in a state without encryption (step S69). When it is possible to set the state without encryption (Yes in step S69), after setting the encryption method of the access point 25 to the state without encryption, the value of the variable x is set the number of times of execution. After resetting to the variable m of (step S70), the process returns to step S62, and the setting operation of the encryption method is repeated until the upper limit value N of the number of executions is reached.

If it is not possible to set the state without encryption (No in step S69), it is determined that the encryption method of the access point 25 cannot be set, and the access point 25 is determined. The setting operation of the encryption method of FIG. 12 is terminated, and the setting operation of the encryption method of FIG. 12 is terminated.

In the present embodiment, by performing the above operations shown in FIGS. 4 to 12, the wireless slave unit 29 such as a smart phone or tablet that may belong to another access point 27 is When approaching the access point 25 with an automatic connection function, the access point 25 performs burst transmission of attribution release frames for all frequency bands and all bands that can be used as an access point with a frame burst time of 0 msec. As a result, the attribution to the other access point 27 of the wireless slave unit 29 is immediately released. After that, by variably controlling the SSID, encryption method, and encryption key of the access point 25 with the automatic connection function, the profile information stored in the wireless slave unit 29 is matched, and the wireless slave unit 29 is set. It is easily possible to automatically attribute to the access point 25 having an automatic connection function.

In addition, the access point 25 having an automatic connection function peculiar to this embodiment performs an operation of changing the SSID, the encryption method, and the encryption key of the own access point, so that a smart phone, a tablet, or the like approaching. When operating to match the profile information of the wireless slave unit 29 of the access point 25, the SSID, encryption method, and encryption key of the access point 25 are displayed on the Web GUI (Graphical User Interface), that is, the Web page of the Internet. Information indicating the result of whether or not the profile information of the 29 is matched is posted together with the profile information of the wireless slave unit 29 so that the user of the access point 25 or the target wireless slave unit 29 can view the information. You can do it. As a result, the user of the access point 25 can acquire information on the profile of the approaching wireless handset 29 (information that could not be grasped by the conventional access point). The effect of becoming is obtained.

(Explanation of the effect of the embodiment)
As described in detail above, the following effects can be achieved in the present embodiment.

In the present embodiment, the access point 25 (access point according to one embodiment of the present invention) is an access point with an automatic connection function, and a wireless slave unit 29 such as a smart phone or a tablet approaches the own access point 25. When it is detected that the wireless slave unit 29 has arrived, it is forcibly set to a state in which the wireless slave unit 29 does not belong to any of the other access points, and then the wireless slave unit 29 is assigned to the own access point 25. Since the operation is automatically performed, it is possible to automatically shift to a state in which the wireless slave unit 29 can communicate with the own access point 25.

That is, the access point 25 with the automatic connection function is a smart belonging to the wireless slave unit 29 such as a smartphone or tablet existing around the own access point 25 or another access point 27 existing around the own access point 25. By measuring the radio field strength of the wireless slave unit 29 such as a phone or tablet, when it is detected that the wireless slave unit 29 is approaching the own access point 25, it can be used as an access point. It is possible to forcibly release the attribution state of the radio slave unit 29 by performing burst transmission of the attribution release frame with a frame burst time of 0 msec for all bands (all channels) of the frequency bands 2.4 GHz and 5 GHz. Is.

After that, the access point 25 with the automatic connection function changes the SSID, encryption method, and encryption key of the own access point 25, and has the same SSID as the wireless profile information stored in the wireless slave unit 29. By automatically setting the encryption method and the encryption key, the approaching wireless slave unit 29 can be assigned to the own access point 25, so that the wireless slave unit 29 to which the wireless slave unit 29 belongs can be assigned. It is possible to automatically shift to a state where communication is possible.

The configuration of a preferred embodiment of the present invention has been described above. However, it should be noted that such embodiments are merely exemplary of the invention and do not limit the invention in any way. Those skilled in the art will be able to easily understand that various modifications and changes can be made according to a specific application without departing from the gist of the present invention.

1 to 24 wireless I / F (wireless interface)
25 access points (AP)
26 Wireless I / F (wireless interface at other access points)
27 Other access points (AP)
28 Wireless I / F (Wireless interface in wireless handset)
29 Wireless handset (wireless terminal)
30 Radio field strength judgment table 31 Radio field strength judgment unit 32 Wireless handset approach detection unit 33 Wireless handset attribution release unit 34 Wireless handset connection unit

Claims (10)

An access point that has the function of connecting a wireless handset.
Based on the result of acquiring the radio wave strength around the own access point, the wireless slave unit approach detection unit that detects that the wireless slave unit is approaching the own access point, and
When it is detected that the wireless slave unit is approaching its own access point, the wireless slave unit is forcibly set to a state in which it does not belong to any other access point. Department and
After setting the wireless slave unit to a state in which it does not belong to any of the other access points, the SSID (Service Set Identifier), encryption method, and encryption key of the own access point are variably controlled to control the wireless. By matching the profile information stored in the slave unit, the wireless slave unit is assigned to the own access point, and the wireless slave unit is connected to the own access point.
An access point characterized by having. The wireless slave unit approach detection unit
The radio wave strength measured by the wireless interface of the own access point or the radio wave strength measured by another access point located around the own access point is acquired as the radio wave strength around the own access point, and the acquired strength of the radio wave strength is obtained. By determining whether or not the level is getting stronger in time series, it is detected whether or not the radio handset is approaching its own access point.
The access point according to claim 1. The wireless slave unit attribution release unit is
The attribution state of the radio slave unit is forcibly released by burst transmission of the unattribution frame with a frame burst time of 0 ms for all frequency bands and all channels that can be used for access points.
The access point according to claim 1 or 2. The wireless handset connection part is
Of the SSID, encryption method, and encryption key of the own access point that is variably controlled, the encryption method is security regardless of the encryption method stored as the profile information in the wireless slave unit. ) Set in order of sex,
The access point according to any one of claims 1 to 3. For each frequency band and each bandwidth that can be used for access points, the radio field strength judgment table and registered radio wave strength thresholds that classify the radio field intensity into three levels of strong, medium, and weak are set in advance. ,
Each time the radio field intensity around the own access point is acquired at predetermined intervals, the frequency band and bandwidth of the acquired radio wave intensity are determined by referring to the radio wave intensity determination table based on the acquired radio wave intensity. A radio wave intensity determination unit that determines whether the corresponding intensity level is strong, medium, or weak, and
The wireless slave unit approach detection unit further has
When the determination result of the intensity level by the radio wave intensity determination unit changes in time series from weak to medium to strong, it is determined that the wireless slave unit has detected that it is approaching the own access point. To do,
The access point according to claim 4. A wireless connection method for access points that has the function of connecting wireless slave units.
Based on the result of acquiring the radio wave strength around the own access point, the wireless slave unit approach detection step for detecting that the wireless slave unit is approaching the own access point, and
When it is detected that the wireless slave unit is approaching its own access point, the wireless slave unit is forcibly set to a state in which it does not belong to any other access point. Steps and
After setting the wireless slave unit to a state in which it does not belong to any of the other access points, the SSID (Service Set Identifier), encryption method, and encryption key of the own access point are variably controlled to control the wireless. By matching the profile information stored in the slave unit, the wireless slave unit is assigned to the own access point, and the wireless slave unit is connected to the own access point.
A wireless connection method characterized by having. The wireless slave unit approach detection step
The radio wave strength measured by the wireless interface of the own access point or the radio wave strength measured by another access point located around the own access point is acquired as the radio wave strength around the own access point, and the acquired strength of the radio wave strength is obtained. By determining whether or not the level is getting stronger in time series, it is detected whether or not the radio handset is approaching its own access point.
The wireless connection method according to claim 6, wherein the method is characterized by the above. The wireless slave unit attribution release step is
The attribution state of the radio slave unit is forcibly released by burst transmission of the unattribution frame with a frame burst time of 0 ms for all frequency bands and all channels that can be used for access points.
The wireless connection method according to claim 6 or 7. The wireless slave unit connection step is
Of the SSID, encryption method, and encryption key of the own access point that is variably controlled, the encryption method is security regardless of the encryption method stored as the profile information in the wireless slave unit. ) Set in order of sex,
The wireless connection method according to any one of claims 6 to 8, wherein the wireless connection method is characterized. A wireless connection control program executed by an access point that has the function of connecting a wireless slave unit.
Based on the result of acquiring the radio wave strength around the own access point, the wireless slave unit approach detection process for detecting that the wireless slave unit is approaching the own access point, and
When it is detected that the wireless slave unit is approaching its own access point, the wireless slave unit is forcibly set to a state in which it does not belong to any other access point. Process and
After setting the wireless slave unit to a state in which it does not belong to any of the other access points, the SSID (Service Set Identifier), encryption method, and encryption key of the own access point are variably controlled to control the wireless. A wireless slave unit connection step of assigning the wireless slave unit to the own access point and connecting the wireless slave unit to the own access point by matching the profile information stored in the slave unit.
A wireless connection control program characterized by having.

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