JP2009038665A - Wireless communication apparatus and control method thereof - Google Patents

Abstract

A communication parameter setting error is notified to a user at an early stage.
Input means for inputting a second parameter, connection means for searching for surroundings based on the first parameter and connecting to the network, and after connecting to the network, based on the second parameter for the network The transmission means for transmitting at least one search packet, the determination means for determining whether or not the second parameter matches based on the response result from the network to the search packet, and the second parameter match Notification means for notifying the user to that effect.
[Selection] Figure 2

Description

  The present invention relates to a technology for setting communication parameters used for communication by a wireless communication device.

  In a wireless LAN network compliant with the IEEE 802.11 group, which is one form of a wireless communication system, there are mainly two communication forms (modes). One is an infrastructure mode having an access point for controlling each wireless client, and the other is an ad hoc mode in which each wireless client communicates directly. Hereinafter, the infrastructure mode and the ad hoc mode are referred to as a wireless LAN network mode.

  In either wireless LAN network mode, in order for a wireless client to connect to a wireless network, it is necessary to set wireless parameters such as an SSID (Service Set Identifier) that is a network identifier and a network mode. In addition, it is necessary to further set an encryption method and an encryption key for encrypting the communication path.

Setting these wireless parameters is complicated, and communication cannot be performed if an incorrect value is set. Therefore, for SSID and network mode, a mechanism for automatically inputting values obtained by searching a surrounding wireless network is often used. Japanese Patent Application Laid-Open No. 2004-228561 discloses a mechanism for discriminating an SSID, a network mode, and an encryption method and assisting a user to set wireless parameters.
JP 2005-176320 A

  However, although the above-described technique can reduce the burden of setting by the user for the SSID, network mode, and encryption method, the encryption key must be manually input. In addition, the encryption key generally has a large number of digits and may cause an erroneous input by the user.

  In the case where connection authentication to the network is not required (open authentication), the connection to the wireless network itself is completed even if the encryption key is incorrect. However, if the encryption keys are different, communication using a higher-level protocol after network connection is impossible. In such a case, for example, when a timeout occurs in communication using a higher-level protocol, it is understood that the user cannot communicate for the first time. However, it is difficult to determine the cause of timeout, such as whether there is no communication partner in the higher-level protocol, or whether the encryption key in the wireless network is wrong. End up.

  When the network mode is an ad hoc mode, communication may not be possible even if the SSID and frequency channel settings are the same. Specifically, if the BSSID (Basic Service Set Identifier) is different, logically separate wireless networks are constructed and communication is impossible. In general, the SSID is a parameter that can be set by the user or a value that is stored in advance in the apparatus. On the other hand, since the BSSID is a parameter that is automatically set as an identifier when a wireless LAN network in the ad hoc mode is constructed, it is difficult for the user to specify the cause.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to notify a user of a parameter setting error set by the user at an early stage.

  In order to solve one or more of the problems described above, the wireless communication apparatus of the present invention has the following configuration. That is, a wireless communication device that is connected to a network in which the first parameter is set based on the first parameter and communicates with other devices in the network based on the second parameter, Input means for inputting the parameters, connection means for searching the surroundings based on the first parameter and connecting to the network, and connection to the network by the connection means within a predetermined period after the connection to the network Transmitting means for transmitting at least one search packet based on the second parameter; and based on a response result from the network to the search packet, the second parameter input by the input means and the network Determining means for determining whether or not the second parameter set in the other device matches; If the second parameter is determined not to match the serial determining means comprises a notification unit configured to notify the user.

  In order to solve one or more of the above-described problems, a method for controlling a wireless communication apparatus of the present invention has the following configuration. That is, a method for controlling a wireless communication device that connects to a network in which the first parameter is set based on a first parameter and communicates with other devices in the network based on a second parameter. An input step of inputting a second parameter, a connection step of searching for surroundings based on the first parameter and connecting to the network, and within a predetermined period after connecting to the network by the connection step, A transmission step of transmitting at least one search packet based on the second parameter to the network; and the second parameter input by the input step based on a response result from the network to the search packet; A judgment for determining whether or not the second parameter set in another device in the network matches. A step, when the second parameter by said determining step is determined to not match, comprising a notification step of notifying the user.

  ADVANTAGE OF THE INVENTION According to this invention, the technique which makes it possible to notify a user of the communication parameter setting mistake at an early stage can be provided.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. The following embodiments are merely examples, and are not intended to limit the scope of the present invention.

(First embodiment)
As a first embodiment of a wireless communication apparatus according to the present invention, a wireless communication terminal using an IEEE 802.11 standard wireless LAN will be described below as an example. Further, an explanation will be given by taking an SSID as a first parameter to be connected to a network and a WEP (Wired Equivalent Privacy) encryption key as an example.

<System configuration>
FIG. 1 is a diagram illustrating an overall configuration of a wireless LAN system including a wireless communication apparatus according to the first embodiment. In the first embodiment, a case will be described in which each wireless communication device operates in an ad hoc mode in which direct communication is performed. In other words, a plurality of clients 101 (three clients 101a, 101b, and 101c) form an ad hoc mode wireless LAN network. In the ad hoc mode, each terminal in the wireless LAN system performs direct communication.

  When configuring such an ad hoc mode wireless LAN network, the following operation is performed. That is, in many cases, after the client 101a newly constructs a wireless LAN network in the ad hoc mode, the other clients 101b and 101c participate in the constructed network.

  FIG. 2 is an internal block diagram of the wireless communication apparatus (client 101) according to the first embodiment.

  Reference numeral 201 denotes a central processing unit (CPU), 202 denotes a RAM, 203 denotes a ROM, 204 denotes an input unit, 205 denotes a wireless communication unit, 206 denotes a display unit, and 209 denotes a bus.

  The CPU 201 controls each unit of the client 101 by executing a control program stored in the ROM 203. The RAM 202 is used as a work memory of the CPU 201 in addition to temporary storage of parameters described later.

  The input unit 204 includes a keyboard or the like, and accepts setting input from the user via the input unit 204. The display unit 206 displays parameters and the like set and input via the input unit 204, and displays a warning such as a setting error to the user as will be described later.

  The wireless communication unit 205 is a functional unit that performs wireless communication with other wireless communication devices, and here, a wireless communication system conforming to the wireless LAN (IEEE 802.11) standard is used. As described above, the operation of the wireless communication unit 205 is controlled by the CPU 201 executing the control program.

<Operation of the device>
FIG. 11 is a flowchart for setting various parameters in the wireless communication apparatus. In the following operations, the wireless communication apparatus (client 101) receives input from the user via the input unit 204.

  In step S1101, an SSID (Service Set Identifier) is set. In the ad hoc mode described later, the SSID is used as an identifier of an IBSS (Independent Basic Service Set). In the infrastructure mode, the SSID is used as an identifier of BSS (Basic Service Set) or ESS (Extended Service Set). Note that a common SSID may be stored in the ROM 203 in advance between apparatuses that perform communication, and the stored SSID may be automatically read from the ROM 203 and set.

  In step S1102, the network mode is set. Here, either “ad hoc mode” in which a plurality of clients 101 directly communicate with each other or “infrastructure mode” in which a plurality of clients 101 communicate with each other via an access point is selected.

  In step S1103, an encryption method is set. Specifically, any of “no encryption”, “WEP (Wired Equivalent Privacy)”, and “WPA (Wi-Fi Protected Access)” is set.

  In step S1104, if “WEP” or “WPA” is selected in step S1103, an encryption key (or passphrase) is set.

  The parameters in the wireless communication device are set by the above procedure. The frequency channel may be specified together. These parameter setting operations are the same procedure as that of a conventional wireless communication apparatus compliant with the wireless LAN.

  FIG. 3 is an operation flowchart of the client 101 in the first embodiment. Here, the description will be given focusing on the client 101a, but the same applies to the other clients (101b and 101c).

  The following steps are realized by controlling each unit by the CPU 201 of the client 101a executing a control program. It is assumed that the parameter setting described with reference to FIG. 11 has been performed prior to the following flow.

  Hereinafter, wireless LAN networks having the same SSID, frequency channel, network mode, and BSSID are referred to as belonging to the same network. On the other hand, a wireless LAN network having the same SSID, frequency channel, and network mode but different BSSID is referred to as another wireless LAN network having the same setting but different.

  In step S301, in order to join an existing wireless LAN network or construct a new wireless LAN network, a wireless LAN network identical to the SSID and frequency channel designated by the user is searched. Specifically, a probe request (Probe Request) designating the SSID and frequency channel is transmitted, and a probe response (Probe Response) from another device is awaited. In this case, the device that returns the probe response is a device that sets the SSID and the frequency channel.

  In step S302, it is determined whether an existing wireless LAN network exists at the time of probe request transmission in step S301. If a probe response is received from another client (for example, 101b) and it is determined that an existing network exists, the process proceeds to step S309. On the other hand, if the probe response is not received and it is determined that the existing network does not exist, the process proceeds to step S303.

  In step S303, a BSSID is set at random, and a new wireless LAN network is constructed using the parameters. In the ad hoc mode, this network is also called IBSS. In addition, after constructing a new wireless LAN network, transmission of a beacon is started.

  In step S304, after constructing a new wireless LAN network, at least one broadcast packet as a search packet is transmitted to the wireless LAN network. At this time, it may be configured to transmit within a predetermined period. Note that, depending on the wireless communication environment, packet loss may occur, so that a plurality of search packets may be transmitted.

  In step S305, it is determined whether a response to the broadcast packet transmitted in step S304 has been received. If received, the connection process is completed. For example, when a response is received from the client 101b, it can be determined that the parameters of the client (client 101a) and the client 101b are the same. That is, since it can be confirmed that the BSSID and the encryption key are the same based on the response result to the search packet, it can be determined that communication can be performed without any problem.

  On the other hand, if no response is received, the process proceeds to step S306. In this case, it is conceivable that at least one of the encryption key and the BSSID differs between the parameters of the client (client 101a) and the client 101b. Alternatively, it is conceivable that no one (client 101a) participates in the new wireless LAN network.

  In step S306, the wireless LAN network is searched again. This operation is the same as step S301. With this operation, it is possible to specify whether or not the cause of not receiving the response in step S305 is the encryption key mismatch.

  In step S307, it is determined whether there is a wireless LAN network having the same SSID, frequency channel, and BSSID at the time of probe request transmission in step S306. Specifically, when a probe response is received from another client, the BSSID included in the probe response is confirmed, and it is determined whether or not it is the same as the BSSID of the network constructed by the client 101a. If it is determined that the BSSIDs are also the same, it can be estimated that the difference in the encryption key is the cause of not receiving the probe response, and the process proceeds to step S308. On the other hand, when the probe response is not received or when the BSSID included in the received probe response is different, it is determined that the cause is other than the encryption key mismatch and the connection process is completed. That is, as a creator in the ad hoc mode network, the connection process is completed, and the second and subsequent clients (for example, 101b) wait for participation in the wireless LAN network.

  In step S308, an error indicating that the encryption keys are different is displayed on the display unit 206, and the connection process is stopped. Note that an alarm sound or the like may be output via a speaker (not shown) to notify the user. At this time, the network may be disconnected from the connected network.

  In step S309, it joins the existing wireless LAN network detected in step S302.

  In step S310, after joining the wireless LAN network in step S309, at least one broadcast packet as a search packet is transmitted to the wireless LAN network. At this time, it may be configured to transmit within a predetermined period. Note that, depending on the wireless communication environment, packet loss may occur, so that a plurality of search packets may be transmitted.

  In step S311, it is determined whether a response to the broadcast packet transmitted in step S310 has been received. If received, the connection process is completed. For example, when a response is received from the client 101b, it can be determined that the encryption key of the client (client 101a) and the encryption key of the client 101b are the same. That is, it can be determined that communication can be performed without any problem.

  On the other hand, if no response is received, the process proceeds to step S312. In this case, it can be determined that the encryption key of the client (client 101a) is different from the encryption key of the client 101b.

  In step S312, an error indicating that the encryption keys are different is displayed on the display unit 206, and the connection process is stopped. Note that an alarm sound or the like may be output via a speaker (not shown) to notify the user. At this time, the network may be disconnected from the connected network.

  In addition, it demonstrated that a broadcast was transmitted in step S304 and step S310. However, any packet that requests a response to the transmitted packet can be used. However, in consideration of communication efficiency, it is preferable to use broadcast or multicast packets. As a broadcast packet to be used, for example, an ARP (Address Resolution Protocol) packet, an RARP (Reverse Address Resolution Protocol) packet, or the like can be used. In addition, an EAP (Extensible Authentication Protocol) packet, a NetBIOS broadcast, or the like can be used.

  4 to 7 are diagrams showing a sequence of connection processing between two clients. When the connection process in FIG. 3 is executed, it can be classified into the following four patterns by the client B that exists (or does not exist) within the communicable range of the client A.

  Pattern 1: A pattern in which client B has already established a network and client A participates in the network (FIG. 4).

  Pattern 2: A pattern in which client A and client B construct their own network (IBSS) without detecting each other's presence (FIG. 5). This corresponds to the case where the client A and the client B start connection processing almost simultaneously.

  Pattern 3: A pattern in which the client A constructs a network and the client B participates in the network, but the respective encryption keys are different (FIG. 6).

  Pattern 4: A pattern in which no other client exists within the communicable range of client A (FIG. 7).

  However, in any of the above four patterns, if the encryption key is correct according to the processing flow described with reference to FIG. On the other hand, if the encryption key is not correct, an error notification is given and the connection process is stopped.

  As described above, according to the wireless communication apparatus according to the first embodiment, the user can confirm at an early stage whether or not the setting of the encryption key is correct. That is, if the encryption key is not correct, an error notification can be received at the initial stage of the connection process. Therefore, as in the prior art, it is possible to reduce the stress of the user when communication is impossible.

(Second Embodiment)
In the second embodiment, a mode for further improving the connection by performing a scan for confirmation will be described.

  In the first embodiment, a broadcast packet is transmitted immediately after the network is constructed in step S303. However, there is a high possibility that network detection will fail due to the radio wave condition of the place where the wireless communication device is installed.

  In addition, when two or more clients try to construct a new network almost simultaneously, another network having different BSSIDs may be constructed. That is, they cannot recognize each other during the initial scan (step S303), and set different BSSIDs.

<Operation of the device>
FIG. 8 is an operation flowchart of the client 101 in the second embodiment. Here, the description will be given focusing on the client 101a, but the same applies to the other clients (101b and 101c).

  The following steps are realized by controlling each unit by the CPU 201 of the client 101a executing a control program. It is assumed that the parameter setting described with reference to FIG. 11 has been performed prior to the following flow.

  In step S801, in order to participate in an existing wireless LAN network or to newly construct a wireless LAN network, a wireless LAN network identical to the SSID and frequency channel designated by the user is searched. Specifically, a probe request (Probe Request) designating the SSID and frequency channel is transmitted, and a probe response (Probe Response) from another device is awaited. In this case, the device that returns the probe response is a device that sets the SSID and the frequency channel.

  In step S802, it is determined whether an existing wireless LAN network exists at the time of probe request transmission in step S801. If a probe response is received from another client (for example, 101b) and it is determined that an existing network exists, the process proceeds to step S809. On the other hand, if the probe response is not received and it is determined that the existing network does not exist, the process proceeds to step S803.

  In step S803, after a BSSID is set at random, a new wireless LAN network is constructed using the parameters. In the ad hoc mode, this network is also called IBSS. In addition, after constructing a new wireless LAN network, transmission of a beacon is started.

  In step S804, the wireless LAN network is searched again. This operation is the same as that in step S801.

  In step S805, it is determined whether there is a wireless LAN network having the same SSID, frequency channel, and BSSID at the time of the probe request transmission in step S804. Specifically, when a probe response is received from another client, the BSSID included in the probe response is confirmed, and it is determined whether or not it is the same as the BSSID of the network constructed by the client 101a. If a probe response is received from another client (for example, 101b) and it is determined that the BSSIDs included in the probe response are the same, the process proceeds to step S806. On the other hand, if no probe response is received, it is determined that no other client exists and the connection process is completed. If the BSSID included in the received probe response is different, it is determined that only other clients with different BSSIDs exist, and the connection process is stopped.

  As described above, when two or more clients try to construct a new network almost simultaneously, a wireless LAN network having the same SSID and frequency channel but different BSSIDs may be constructed. Such a situation may occur when a user instructs the start of wireless communication almost simultaneously in a plurality of devices that perform communication. However, if such a network with a different BSSID is constructed, it becomes impossible to communicate with each other. End up.

  Therefore, if a network having the same SSID and frequency channel but different BSSID is detected by performing a scan in step S804 after the wireless LAN network is constructed by itself, the connection process is immediately terminated to quickly perform the reconnection process. It becomes possible.

  In step S806, at least one broadcast packet that is a search packet is transmitted to the wireless LAN network. At this time, it may be configured to transmit within a predetermined period.

  In step S807, it is determined whether a response to the broadcast packet transmitted in step S806 has been received. If received, the connection process is completed. For example, when a response is received from the client 101b, it can be determined that the parameters of the client (client 101a) and the client 101b are the same. That is, since it can be confirmed that the BSSID and the encryption key are the same, it can be determined that communication can be performed without any problem.

  On the other hand, if no response is received, the process proceeds to step S808. In this case, it is conceivable that the encryption key is different between the parameters of the client (client 101a) and the client 101b.

  In step S808, an error indicating that the encryption keys are different is displayed on the display unit 206, and the connection process is stopped. Note that an alarm sound or the like may be output via a speaker (not shown) to notify the user.

  Since the connection process after step S809 is the same as the connection process after step S309 in the first embodiment, a description thereof will be omitted.

  As described above, according to the wireless communication apparatus according to the second embodiment, the user can confirm at an early stage whether or not the setting of the encryption key is correct.

(Third embodiment)
In the third embodiment, a wireless LAN system that operates in the infrastructure mode will be described. In particular, a case will be described in which encryption is performed using a WEP key and connection is made to an access point set to use open authentication.

<System configuration>
FIG. 9 is a diagram illustrating an overall configuration of a wireless LAN system including a wireless communication apparatus according to the third embodiment. In 1st Embodiment, the case where each radio | wireless communication apparatus was operate | moving in the ad hoc mode which communicates directly was demonstrated. However, in the third embodiment, each client is set to operate in the infrastructure mode, and all communications with other devices are performed via access points.

  That is, a plurality of clients 901 (two of clients 901a and 901b) are connected to the access point 900 to configure an infrastructure mode wireless LAN network. In order to configure such an infrastructure mode wireless LAN network, the following operations are generally performed. In other words, after the access point 900 newly constructs an infrastructure mode wireless LAN network, the other clients 901a and 901b participate in the constructed network.

  Here, for the sake of simplicity, it is assumed that there is only one access point 900 within the communicable range of the client 901a. The internal block diagram of the client 901 is the same as that in FIG.

<Operation of the device>
FIG. 10 is an operation flowchart of the client 901 in the third embodiment. Here, the description is given focusing on the client 901a, but the same applies to the other clients (901b).

  The following steps are realized by controlling each unit by the CPU 201 of the client 101a executing a control program. It is assumed that the parameter setting described with reference to FIG. 11 has been performed prior to the following flow.

  In step S1001, in order to join an existing wireless LAN network or construct a new wireless LAN network, a search for a wireless LAN network identical to the SSID and frequency channel designated by the user is performed. Specifically, a probe request (Probe Request) is transmitted and a probe response (Probe Response) from an access point within the communicable range is awaited.

  In step S1002, it is determined whether or not an existing wireless LAN network (BSS or ESS) exists at the time of probe request transmission in step S1001. If a probe response is received from the access point 900 and it is determined that an existing network exists, the process proceeds to step S1003. On the other hand, if the probe response is not received and it is determined that there is no access point (existing network), the connection process is stopped. That is, in the infrastructure mode, communication is impossible unless an access point exists.

  In step S1003, it joins the existing wireless LAN network detected in step S1002.

  In step S1004, after joining the wireless LAN network in step S1003, at least one broadcast packet that is a search packet is transmitted toward the wireless LAN network. At this time, it may be configured to transmit within a predetermined period.

  In step S1005, it is determined whether a response to the broadcast packet transmitted in step S1004 has been received. If received, the connection process is completed. That is, when a response is received from the access point 900, it can be determined that the encryption key of the client (the client 901a) and the encryption key of the access point 900 are the same. That is, it can be determined that communication can be performed without any problem.

  On the other hand, if no response has been received, the process proceeds to step S1006. In this case, it can be determined that the encryption key of the own (client 901a) and the encryption key of the access point 900 are different.

  In step S1006, an error indicating that the encryption keys are different is displayed on the display unit 206, and the connection process is stopped. Note that an alarm sound or the like may be output via a speaker (not shown) to notify the user.

  As described above, according to the wireless communication apparatus according to the third embodiment, the user can confirm at an early stage whether or not the setting of the encryption key is correct. That is, it can be seen that the parameter confirmation method of the present invention can be used in the infrastructure mode.

(Other embodiments)
Although the embodiments of the present invention have been described in detail above, the present invention may be applied to a system constituted by a plurality of devices or may be applied to an apparatus constituted by one device.

  The present invention can also be achieved by supplying a program that realizes the functions of the above-described embodiments directly or remotely to a system or apparatus, and the system or apparatus reads and executes the supplied program code. The Accordingly, the program code itself installed in the computer in order to realize the functional processing of the present invention by the computer is also included in the technical scope of the present invention.

  In this case, the program may be in any form as long as it has a program function, such as an object code, a program executed by an interpreter, or script data supplied to the OS.

  Examples of the recording medium for supplying the program include a floppy (registered trademark) disk, a hard disk, an optical disk (CD, DVD), a magneto-optical disk, a magnetic tape, a nonvolatile memory card, and a ROM.

  Further, the functions of the above-described embodiments are realized by the computer executing the read program. In addition, based on the instructions of the program, an OS or the like running on the computer performs part or all of the actual processing, and the functions of the above-described embodiments can also be realized by the processing.

  Further, the program read from the recording medium is written in a memory provided in a function expansion board inserted into the computer or a function expansion unit connected to the computer. Thereafter, the CPU of the function expansion board or function expansion unit performs part or all of the actual processing based on the instructions of the program, and the functions of the above-described embodiments are realized by the processing.

It is a figure which shows the wireless LAN network of an ad hoc mode. It is an internal block diagram of a radio | wireless communication apparatus. 4 is an operation flowchart of the wireless communication apparatus according to the first embodiment. It is a communication sequence diagram (normal system) between radio | wireless communication terminals. It is a communication sequence diagram (NW simultaneous construction) between wireless communication terminals. It is a communication sequence diagram (encryption key mismatch) between radio | wireless communication terminals. It is a communication sequence diagram (NW independent construction) between wireless communication terminals. It is an operation | movement flowchart of the radio | wireless communication apparatus which concerns on 2nd Embodiment. It is a figure which shows the wireless LAN network of an infrastructure mode. It is an operation | movement flowchart of the radio | wireless communication apparatus which concerns on 3rd Embodiment. It is a flowchart of the parameter setting in a radio | wireless communication terminal.

Claims (11)

A wireless communication device that connects to a network in which the first parameter is set based on a first parameter and communicates with other devices in the network based on a second parameter;
Input means for inputting a second parameter;
Connection means for searching around and connecting to the network based on the first parameter;
Transmitting means for transmitting at least one search packet based on the second parameter to the network within a predetermined period after connecting to the network by the connecting means;
Based on a response result from the network to the search packet, whether or not the second parameter input by the input unit matches a second parameter set in another device in the network Determination means for determining;
A notification means for notifying a user to that effect when the determination means determines that the second parameter does not match;
A wireless communication apparatus comprising:   2. The determination unit according to claim 1, wherein the determination unit determines that the second parameter does not match when there is no response in any of the plurality of search packets transmitted by the transmission unit. Wireless communication device.   The wireless communication apparatus according to claim 1, wherein the second parameter is an encryption key used for encrypting communication in the network.   The wireless communication apparatus according to claim 1, wherein the search packet is a broadcast packet for the network.   2. The wireless communication according to claim 1, further comprising a control unit that controls to disconnect the network connected by the connection unit when the determination unit determines that the second parameter does not match. apparatus. A method of controlling a wireless communication device that connects to a network in which the first parameter is set based on a first parameter and communicates with other devices in the network based on a second parameter,
An input step for inputting the second parameter;
A connection step of searching around and connecting to a network based on the first parameter;
A transmission step of transmitting at least one search packet based on the second parameter to the network within a predetermined period after connecting to the network by the connection step;
Based on a response result from the network to the search packet, whether or not the second parameter input in the input step matches a second parameter set in another device in the network A determination step for determining;
When it is determined that the second parameter does not match by the determination step, a notification step of notifying the user of the fact,
A method for controlling a wireless communication apparatus, comprising:   7. The determination step according to claim 6, wherein the determination step determines that the second parameter does not match when there is no response in any of the plurality of search packets transmitted by the transmission step. Control method for wireless communication apparatus.   The method according to claim 6, wherein the second parameter is an encryption key used for encrypting communication in the network.   The method according to claim 6, wherein the search packet is a broadcast packet for the network.   The wireless communication according to claim 6, further comprising a control step of controlling to disconnect the network connected by the connection step when the determination step determines that the second parameter does not match. Control method of the device.   A non-transitory computer-readable storage medium storing a program for causing a computer to execute the wireless communication apparatus control method according to any one of claims 6 to 10.

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