JP6198074B2 - Wireless LAN relay device, wireless LAN communication system, address assignment method, and program - Google Patents

Description

  The present invention relates to a wireless LAN relay device, a wireless LAN communication system, an address assignment method, and a program, and more particularly to a wireless LAN relay device, a wireless LAN communication system, an address assignment method, and a program that operate when a failure occurs.

  In recent years, wireless LAN (Local Area Network) communication areas have been formed in various places such as homes or buildings. In addition, by using a wireless LAN relay device, an environment is established in which radio waves are transmitted to every corner of a building or the like so that many users can use wireless LAN communication. For example, the wireless LAN relay device relays the radio wave transmitted from the wireless LAN access point device and transmits it to the wireless LAN communication terminal. Accordingly, even a wireless LAN communication terminal that cannot directly receive radio waves transmitted from the wireless LAN access point device can be connected to the wireless LAN access point device via the wireless LAN relay device.

  Further, in recent years, for the purpose of improving convenience for users using wireless LAN communication, investigations are also being made on how to deal with a failure in a wireless LAN access point device or the like.

  Patent Document 1 describes setting an alternative access line using an external wireless LAN router when a WAN (Wide Area Network) side line of the wireless LAN router is disconnected.

JP 2014-175771 A

  A case will be described in which a wireless LAN communication terminal is connected to a wireless LAN access point device via a wireless LAN relay device, and the wireless connection between the wireless LAN relay device and the wireless LAN access point device is disconnected. . In this case, if there is no other wireless relay device that can set an alternative access line to the wireless LAN access point device, the wireless LAN communication terminal can perform wireless LAN communication even if the operation described in Patent Document 1 is executed. Unable to communicate with the access point device.

  Further, since the wireless connection between the wireless LAN communication terminal and the wireless LAN relay device is maintained, the wireless LAN communication terminal can be connected to the Internet or the like even though the wireless connection is maintained. An event that cannot be performed occurs. Furthermore, since the wireless connection between the wireless LAN relay device and the wireless LAN access point device is disconnected, the wireless LAN communication terminal cannot receive an IP address assignment from a DHCP (Dynamic Host Configuration Protocol) server. As a result, even if the user of the wireless LAN communication terminal attempts to confirm the setting of the wireless LAN relay device in order to investigate the cause of the event that the wireless LAN communication terminal cannot be connected to the Internet, etc. There is a problem that can not be. That is, when checking the setting of the wireless LAN relay device, there is a problem that the wireless LAN relay device must be operated directly.

  An object of the present invention is to provide a wireless LAN relay capable of constructing an environment for performing remote access to a wireless LAN relay device in a situation where the wireless connection between the wireless LAN relay device and the wireless LAN access point device is disconnected. An apparatus, a wireless LAN communication system, an address assignment method, and a program are provided.

  A wireless LAN relay device according to a first aspect of the present invention is a wireless LAN relay device that relays radio waves transmitted from a wireless LAN access point device and transmits them to a wireless LAN communication terminal, wherein the wireless LAN access point device A monitoring unit that monitors a wireless connection state with the wireless LAN, and the monitoring unit activates an address management server function when detecting that the wireless connection with the wireless LAN access point device is disconnected, and the wireless LAN communication An address assignment unit for assigning a communication address to the terminal.

  A wireless LAN communication system according to a second aspect of the present invention includes a wireless LAN relay device that relays radio waves transmitted from a wireless LAN access point device, and wireless LAN communication that receives radio waves transmitted from the wireless LAN relay device. A wireless LAN communication system including a terminal, wherein the wireless LAN relay device monitors a wireless connection state with the wireless LAN access point device, and the monitoring unit is connected to the wireless LAN access point device. An address assignment unit that activates an address management server function and assigns a communication address to the wireless LAN communication terminal when it is detected that the wireless connection is disconnected, and the wireless LAN communication terminal Connect to the wireless LAN relay device using the communication address assigned by the LAN relay device. That.

  An address assignment method according to a third aspect of the present invention is an address assignment method in a wireless LAN relay device that relays radio waves transmitted from a wireless LAN access point device and transmits them to a wireless LAN communication terminal. When the wireless connection state with the access point device is monitored and it is detected that the wireless connection with the wireless LAN access point device is disconnected, the address management server function is activated and the communication address is sent to the wireless LAN communication terminal. Is assigned.

  A program according to a fourth aspect of the present invention is a program that is executed by a computer that relays radio waves transmitted from a wireless LAN access point device and transmits the radio waves to a wireless LAN communication terminal, A computer that monitors a wireless connection state and activates an address management server function and allocates a communication address to the wireless LAN communication terminal when it is detected that the wireless connection with the wireless LAN access point device is disconnected. To be executed.

  According to the present invention, a wireless LAN relay device capable of constructing an environment for performing remote access to the wireless LAN relay device in a situation where the wireless connection between the wireless LAN relay device and the wireless LAN access point device is disconnected, A wireless LAN communication system, an address assignment method, and a program can be provided.

1 is a configuration diagram of a communication system according to a first exemplary embodiment; 3 is a configuration diagram of a wireless LAN relay device according to a second embodiment; FIG. 3 is a configuration diagram of a wireless LAN relay device according to a second embodiment; FIG. It is a figure which shows the outline | summary of a process when the wireless LAN relay apparatus concerning Embodiment 2 detects the cutting | disconnection of the wireless connection between wireless LAN access point apparatuses. FIG. 9 is a diagram illustrating a flow of disconnection reason determination processing regarding a wireless connection according to the second exemplary embodiment; FIG. 10 is a diagram illustrating an outline of processing when a wireless LAN relay device according to a third embodiment detects restoration of wireless connection with a wireless LAN access point device; FIG. 6 is a configuration diagram of a wireless LAN relay device according to a fourth embodiment;

(Embodiment 1)
Embodiments of the present invention will be described below with reference to the drawings. A configuration example of a communication system according to the first exemplary embodiment of the present invention will be described with reference to FIG. The communication system in FIG. 1 includes a wireless LAN access point device 100, a wireless LAN relay device 110, and a wireless LAN communication terminal 120. The wireless LAN access point device 100, the wireless LAN relay device 110, and the wireless LAN communication terminal 120 may be computer devices that operate when a processor executes a program stored in a memory.

  The wireless LAN access point device 100 may have a WAN line for connecting to the so-called Internet. For example, an optical communication line or the like may be used as the WAN line. The wireless LAN communication terminal 120 may be a smartphone, a mobile phone terminal, or a personal computer device having a communication function. Alternatively, the wireless LAN communication terminal 120 may be an information home appliance device or the like.

  The wireless LAN relay device 110 relays the radio wave transmitted from the wireless LAN access point device 100 and transmits the relayed radio wave to the wireless LAN communication terminal 120. The wireless LAN relay device 110 may be referred to as a repeater or a relay device, for example.

  The wireless LAN relay device 110 is wirelessly connected to the wireless LAN access point device 100 and the wireless LAN communication terminal 120. With wireless connection, for example, the wireless LAN relay device 110 can set a wireless communication line between the wireless LAN access point device 100 and the wireless LAN communication terminal 120, and can transmit and receive data via the wireless communication line. It may be in a state. The wireless connection may be a state where wireless LAN communication can be performed.

  Next, a configuration example of the wireless LAN relay device 110 will be described. The wireless LAN relay device 110 includes a monitoring unit 10 and an address assignment unit 11. Each component that configures the wireless LAN relay device 110 may be software or a module that performs processing when a processor executes a program stored in a memory. Or each component which comprises the wireless LAN relay apparatus 110 may be comprised by the circuit etc.

  The monitoring unit 10 monitors the wireless connection state between the wireless LAN relay device 110 and the wireless LAN access point device 100. For example, the monitoring unit 10 may monitor whether the wireless connection between the wireless LAN relay device 110 and the wireless LAN access point device 100 is maintained or disconnected.

  When the monitoring unit 10 detects that the wireless connection between the wireless LAN relay device 110 and the wireless LAN access point device 100 has been disconnected, the address assignment unit 11 activates the address management server function. The address management server function may be a DHCP server function, for example. The address assigning unit 11 assigns a communication address to the wireless LAN communication terminal 120 using the address management server function. For example, the address assignment unit 11 assigns an IP address to the wireless LAN communication terminal 120 using the DHCP server function. The communication address may be identification information that can identify the wireless LAN communication terminal 120 and is not limited to the IP address.

  Even when the wireless connection between the wireless LAN relay device 110 and the wireless LAN access point device 100 is disconnected, the wireless LAN communication terminal 120 maintains a wireless connection with the wireless LAN relay device 110. is there. In such a case, the wireless LAN communication terminal 120 cannot communicate with a Web server or the like on the Internet via the wireless LAN access point device 100 even though the wireless connection is maintained. It becomes.

  In a state where the wireless LAN relay device 110 is wirelessly connected to the wireless LAN access point device 100 and the wireless LAN communication terminal 120, the wireless LAN communication terminal 120 is connected to the wireless LAN access point device 100 or the wireless LAN access point device 100. An IP address is assigned from a DHCP server or the like arranged on the WAN side. However, when the wireless connection between the wireless LAN relay device 110 and the wireless LAN access point device 100 is disconnected, the wireless LAN communication terminal 120 is not assigned an IP address from the wireless LAN access point device 100 or a DHCP server. .

  The wireless LAN relay device 110 assigns a communication address to the wireless LAN communication terminal 120 in a state where no IP address can be assigned.

  As described above, in a state where the wireless connection between the wireless LAN relay device 110 and the wireless LAN access point device 100 is disconnected, the wireless LAN relay device 110 assigns a communication address to the wireless LAN communication terminal 120. be able to. Accordingly, the wireless LAN communication terminal 120 can communicate with the wireless LAN relay device 110 using wireless LAN communication. For example, the user can check the setting status of the wireless LAN relay device 110 by performing Web access to the wireless LAN relay device 110 using the wireless LAN communication terminal 120.

  A user who operates the wireless communication terminal 120 confirms the setting status of the wireless LAN relay device 110, and the wireless connection between the wireless LAN relay device 110 and the wireless LAN access point device 100 is disconnected. Furthermore, the reason for cutting can be recognized.

  Further, the user who operates the wireless LAN communication terminal 120 can execute a setting change operation for restoring the wireless connection.

(Embodiment 2)
Next, a configuration example of the wireless LAN relay device 110 according to the second embodiment of the present invention will be described with reference to FIG. The wireless LAN relay device 110 includes a control unit 111, a storage unit 112, and a network communication unit 113. The control unit 111 corresponds to the monitoring unit 10 and the address allocation unit 11 in FIG.

  The control unit 111 monitors the wireless connection state between the wireless LAN access point device 100 and the wireless LAN communication terminal 120. The control unit 111 controls the start and stop of the DHCP server function. The control unit 111 outputs the wireless connection state monitoring result and the control result of the DHCP server function to the storage unit 112.

  The storage unit 112 stores the wireless connection state monitoring result output from the control unit 111, the control result of the DHCP server function, and the like. The monitoring result of the wireless connection state may indicate, for example, whether the wireless connection with the wireless LAN access point device 100 is disconnected or maintained. In addition, the control result of the DHCP server function may indicate whether the DHCP server function is activated or stopped. The storage unit 112 may store information set in a beacon transmitted by the wireless LAN access point device 100.

  The network communication unit 113 is wirelessly connected to the wireless LAN access point device 100 and the wireless LAN communication terminal 120, and transmits and receives data frames between the wireless LAN access point device 100 and the wireless LAN communication terminal 120.

  Next, a detailed configuration example of the wireless LAN relay device 110 according to the second embodiment of the present invention will be described with reference to FIG. First, a configuration example of the control unit 111 will be described. The control unit 111 includes a wireless control unit 111a, a DHCPs control unit 111b, and an HTTPs control unit 111c.

  The wireless control unit 111a detects disconnection or restoration of the wireless connection between the network communication unit 113 and the wireless LAN access point device 100. For example, the wireless control unit 111a may instruct the network communication unit 113 to transmit an inquiry message for confirming normality to the wireless LAN access point device 100.

  When the network communication unit 113 transmits an inquiry message to the wireless LAN access point device 100 and the network communication unit 113 receives a response message from the wireless LAN access point device 100, the wireless control unit 111a communicates with the wireless LAN access point device 100. It may be determined that the wireless connection is maintained. If no response message is transmitted from the wireless LAN access point device 100, the wireless control unit 111a may determine that the wireless connection is disconnected.

  The wireless control unit 111a stores the wireless connection state with the wireless LAN access point device 100 in the storage unit 112 as a parent device connection state 112b. When the wireless connection with the wireless LAN access point device 100 is disconnected, the parent device connection state 112b is stored as disconnected, and when the wireless connection with the wireless LAN access point device 100 is maintained, the parent device connection state 112b is stored. As a connection.

  The DHCPs control unit 111b controls the start and stop of the DHCP server function. The DHCP server function may be a function in which processing is executed by a processor executing a program, for example. Further, when the DHCP server control unit 111b activates the DHCP server function, it assigns an IP address to the wireless LAN communication terminal 120.

  The DHCPs control unit 111b stores the operation state of the DHCP server function in the storage unit 112 as the DHCPs valid / invalid state 112a. When the DHCP server function is activated, the DHCPs valid / invalid state 112a is stored as DHCP valid, and when the DHCP server function is stopped, the DHCPs valid / invalid state 112a is stored as DHCP invalid.

  The HTTPs control unit 111c controls HTTP communication. For example, when receiving an HTTP request message transmitted from the wireless LAN communication terminal 120 or the like, the HTTPs control unit 111c may set information stored as the Web information 112h in the storage unit 112 as an HTTP response message. The Web information 112h may be information for forming a Web page used for changing or updating the setting of the wireless LAN relay device 110.

  In addition to the information described above, the storage unit 112 stores disconnection reason information 112c and beacon information 112d. The disconnect reason information 112c is information indicating a disconnect reason when the wireless connection between the wireless LAN relay device 110 and the wireless LAN access point device 100 is disconnected. The determination process of the cutting reason information 112c will be described in detail later.

  The beacon information 112d is information set in a beacon that the wireless LAN access point device 100 periodically transmits. When the wireless LAN relay device 110 receives beacon information from a plurality of wireless LAN access point devices 100, the beacon information 112d may be held for each wireless LAN access point device 100. The beacon information 112d includes BSSID (Basic Service Set Identifier) information 112e, SSID (Service Set Identifier) information 112f, and encryption mode information 112g.

  The BSSID information 112e may be information indicating the MAC address of the wireless LAN access point device 100, for example. The SSID information 112f is information for identifying the wireless LAN access point device 100, and may be character information, for example. The encryption mode information 112g is information indicating an encryption mode used in communication with the wireless LAN access point device 100. For example, the encryption mode information 112g may be key information used in a WEP (Wired Equivalent Privacy) encryption method, key information used in an AES (Advanced Encryption Standard) encryption method, or the like.

  Next, an outline of processing when the wireless LAN relay device 110 according to the second embodiment of the present invention detects disconnection of the wireless connection with the wireless LAN access point device 100 will be described with reference to FIG.

  First, the wireless control unit 111a detects that the wireless connection with the wireless LAN access point device 100 is disconnected (S10). When the wireless control unit 111a detects that the wireless connection with the wireless LAN access point device 100 is disconnected, the wireless control unit 111a holds the parent device connection state 112b as disconnected. Next, the wireless control unit 111a executes a process of determining the reason why the wireless connection between the wireless LAN access point device 100 and the wireless LAN relay device 110 is disconnected using the BSSID (S11). When the wireless control unit 111a determines the reason why the wireless connection between the wireless LAN access point device 100 and the wireless LAN relay device 110 is disconnected, the wireless control unit 111a updates the reason of the disconnect reason information 112c.

  Next, the DHCPs control unit 111b determines whether to activate or deactivate the DHCP function according to the reason for disconnection of the wireless connection recorded in the disconnection reason information 112c (S12).

  Next, the wireless control unit 111a disconnects the wireless connection with the wireless LAN communication terminal 120 (S13). Thereby, the wireless control unit 111a prompts the wireless LAN communication terminal 120 to reconnect to the wireless LAN relay device 110. After the DHCP function in the wireless LAN relay device 110 is activated, the wireless LAN communication terminal 120 reconnects to the wireless LAN relay device 110, whereby the wireless LAN relay device 110 operates the DHCP function to the wireless LAN communication terminal 120. IP address can be assigned.

  Next, the flow of the disconnection reason determination process regarding the wireless connection using the BSSID according to the second embodiment of the present invention will be described with reference to FIG. In other words, the specific process executed in step S11 of FIG. 4 will be described using FIG. First, the wireless control unit 111a refers to the MAC address of the wireless LAN access point device 100 that is disconnected from the wireless connection and the MAC address held in the BSSID information 112e (S20).

  Next, when the wireless control unit 111a determines that the MAC address of the wireless LAN access point device 100 whose wireless connection has been disconnected does not exist in the BSSID information 112e (S21), the power of the wireless LAN access point device 100 is stopped. It is considered that it did. In this case, the wireless control unit 111a records the reason for disconnection “main device power OFF” in the reason information 112c for disconnection (S22). When the power of the wireless LAN access point device 100 is stopped, the wireless LAN access point device 100 cannot transmit beacon information. Therefore, the wireless LAN relay device 110 does not hold the beacon information regarding the wireless LAN access point device 100 in the beacon information 112d. Therefore, after the wireless control unit 111a detects that the wireless connection with the wireless LAN access point device 100 is disconnected, the BSSID information 112e does not have the same BSSID information as the MAC address of the wireless LAN access point device 100. In this case, it can be considered that the power source of the wireless LAN access point device 100 is stopped.

  In step S <b> 21, when the wireless control unit 111 a determines that the MAC address of the wireless LAN access point device 100 whose wireless connection has been disconnected is present in the BSSID information 112 e, the SSID information 112 f is updated with the wireless LAN access point device 100. It is determined whether or not the wireless connection is changed before and after the wireless connection is disconnected (S23). When it is determined that the SSID information 112f has been changed, the wireless control unit 111a records the disconnect reason “SSID change” in the disconnect reason information 112c (S24).

  If the wireless control unit 111a determines in step S23 that the SSID has not been changed, whether or not the encryption mode information 112g has been changed before and after disconnection of the wireless connection with the wireless LAN access point device 100. Is determined (S25). When it is determined that the encryption mode information 112g has been changed, the wireless control unit 111a records the disconnect reason “change encryption mode” in the disconnect reason information 112c (S26). In step S25, when the wireless control unit 111a determines that the encryption mode has not been changed, the wireless control unit 111a records the disconnection reason “other reason” in the disconnection reason information 112c (S27). The state in which the reason for disconnection corresponds to “other reason” is, for example, that the wireless LAN access point device 100 and the wireless LAN are temporarily associated with the execution of WPS (Wi-Fi (registered trademark) Protected Setup). This is the case when the wireless connection with the relay device 110 is disconnected.

  Next, details of the DHCP function activation or deactivation processing in step S12 of FIG. 4 will be described. When the base unit connection state 112b is “disconnected” and the DHCPs valid / invalid state 112a is “DHCP invalid”, the DHCPs control unit 111b has a disconnect reason set in the disconnect reason information 112c. In response to this, it is determined whether to activate the DHCP server function.

  For example, when the disconnection reason set in the disconnection reason information 112c is “main device power OFF”, “SSID change”, and “encryption mode change”, the DHCPs control unit 111b sets the DHCP server function in the stopped state. It may be activated. When the reason for disconnection is “main device power OFF”, “SSID change”, and “encryption mode change”, operations such as replacement of the power supply of the wireless LAN access point device 100 or change of the setting of the wireless LAN access point device 100 are performed. It is necessary and may take time to eliminate the reason for disconnection. For this reason, the DHCPs control unit 111b activates the DHCP server function so that the wireless LAN communication terminal 120 can access the wireless LAN relay device 110 and check the disconnected event or the like.

  For example, when the disconnection reason set in the disconnection reason information 112c is “other reason”, the DHCPs control unit 111b may leave the DHCP server function stopped. When the disconnection reason is “other reason”, the disconnection event may be temporary, and the connection may be recovered after a certain period of time. Therefore, the DHCPs control unit 111b may not activate the DHCP server function.

  As described above, the wireless LAN relay device 110 according to the second embodiment of the present invention starts and stops the DHCP server function according to the reason that the wireless connection with the wireless LAN access point device 100 is disconnected. Can be controlled.

  In addition, the wireless LAN relay device 110 can activate the DHCP server function and assign an IP address to the wireless LAN communication terminal 120. As a result, the wireless LAN communication terminal 120 can perform Web access to the wireless LAN relay device 110. The wireless LAN relay device 110 discloses the reason for disconnection of the wireless connection on the Web page, and the wireless LAN communication terminal 120 can wirelessly change the setting in the wireless LAN relay device 110 on the Web page. The reason for disconnection can be grasped, and the setting of the wireless LAN relay device 110 can be changed to restore the wireless connection.

(Embodiment 3)
Next, an outline of processing when the wireless LAN relay apparatus 110 according to the third embodiment of the present invention detects recovery of wireless connection with the wireless LAN access point apparatus 100 will be described with reference to FIG.

  First, the wireless control unit 111a detects that the wireless connection with the wireless LAN access point device 100 in the disconnected state has been restored and has entered a connected state (S30). For example, when the wireless control unit 111a receives a response message from the wireless LAN access point device 100 after transmitting an inquiry message to the wireless LAN access point device 100, the wireless control unit 111a performs wireless connection with the wireless LAN access point device 100. May be determined to have been restored. When determining that the wireless connection with the wireless LAN access point device 100 has been restored, the wireless control unit 111a changes the parent device connection state 112b to “connected” and changes the disconnection reason information 112c to “connected”.

  Next, when the DHCPs valid / invalid state 112a is set to “DHCP valid”, the DHCPs control unit 111b stops the DHCP server function and changes the DHCPs valid / invalid state 112a to “DHCP invalid” (S31). .

  Next, the wireless control unit 111a disconnects the wireless connection with the wireless LAN communication terminal 120 (S32). Thereby, the wireless control unit 111a prompts the wireless LAN communication terminal 120 to reconnect to the wireless LAN relay device 110. The wireless LAN communication terminal 120 is assigned an IP address from the wireless LAN access point device 100 after reconnecting to the wireless LAN relay device 110. Accordingly, the wireless LAN communication terminal 120 can communicate with a server device or the like installed in the Internet network or the like via the wireless LAN access point device 100.

  As described above, the wireless LAN relay device 110 according to the third embodiment of the present invention can stop the DHCP server function after the wireless connection with the wireless LAN access point device 100 is restored. As a result, the wireless LAN communication terminal 120 can receive an IP address assignment from the wireless LAN access point device 100 or a DHCP server installed in the Internet network. As a result, the wireless LAN communication terminal 120 accesses the Internet network or the like after the wireless connection between the wireless LAN access point device 100 and the wireless LAN relay device 110 is restored without changing the setting of the device itself. can do.

(Embodiment 4)
Next, a configuration example of the wireless LAN relay device 210 according to the fourth embodiment of the present invention will be described with reference to FIG. The wireless LAN relay device 210 is configured by adding handset information 112i to the wireless LAN relay device 110 of FIG. In this figure, points different from the wireless LAN relay apparatus 110 in FIG. 3 will be mainly described.

  The slave unit information 112 i indicates information related to at least one wireless LAN communication terminal 120 wirelessly connected to the wireless LAN relay device 110. For example, the handset information 112i may be information indicating whether or not the wireless LAN communication terminal 120 is a terminal that can perform Web access. Further, the handset information 112i may be history information indicating whether or not the wireless LAN communication terminal 120 has performed Web access in the past.

  The terminal capable of accessing the Web may be a terminal capable of executing HTTP, for example. The wireless LAN communication terminal 120 can browse information managed by the Web server by transmitting an HTTP request message to the Web server or the like and receiving the HTTP response message.

  Information regarding a terminal that can be accessed via the Web may be information input by a user operating the wireless LAN relay device 210. History information indicating whether or not Web access has been performed in the past may be generated autonomously by the wireless LAN relay apparatus 210 analyzing a message transmitted from the wireless LAN communication terminal 120.

  Further, the slave unit information 112i may be information transmitted from the wireless LAN access point device 100. For example, the wireless LAN access point device 100 may manage option values when a DHCP request is received in the past. For example, the Web server address may be specified as the option value. That is, by confirming the option value, it is possible to determine whether or not the wireless LAN communication terminal 120 is a terminal capable of Web access.

  Therefore, the wireless LAN relay device 110 acquires the DHCP option value held in the wireless LAN access point device 100 as the slave unit information 112i, and makes a DHCP request specifying the option value and the option value. The MAC address of the wireless LAN communication terminal 120 may be associated and managed.

  Here, the DHCPs control unit 111b may consider the slave unit information 112i when determining whether or not the wireless connection with the wireless LAN access point device 100 is disconnected and the DHCP server function is activated. . For example, the DHCPs control unit 111b activates the DHCP server function when a terminal that can perform web access or a terminal that has performed web access in the past is wirelessly connected to its own device in the slave unit information 112i. Also good.

  For example, the wireless LAN communication terminal 120 includes various terminals such as an information home appliance device or a wireless LAN-compatible remote control device as well as a communication device such as a smartphone that performs Web access. In a state where various wireless LAN communication terminals 120 are wirelessly connected to the wireless LAN relay device 110, only the wireless LAN communication terminal 120 that cannot perform Web access or the wireless LAN communication terminal 120 that has not performed Web access. Are wirelessly connected to the wireless LAN relay device 110, those wireless LAN communication terminals 120 do not make Web access to the wireless LAN relay device 110. That is, in a state where only the wireless LAN communication terminal 120 or the like that cannot perform web access to the wireless LAN relay device 110 is wirelessly connected, the DHCPs control unit 111b activates the DHCP server function such as power consumption or resources. It becomes useless processing from the viewpoint.

  The wireless LAN relay device 210 according to the fourth embodiment of the present invention activates the DHSCP server function when only the wireless LAN communication terminal 120 or the like that can perform Web access is connected to the wireless LAN relay device 210. be able to. Therefore, the wireless LAN relay device 210 can prevent the DHCP server function from being activated in vain from the viewpoint of power consumption or resources.

  In the above-described embodiments, the present invention has been described as a hardware configuration, but the present invention is not limited to this. The present invention can also realize processing in the wireless LAN relay apparatus 110 by causing a CPU (Central Processing Unit) to execute a computer program. )

  In the above example, the program can be stored and supplied to a computer using various types of non-transitory computer readable media. Non-transitory computer readable media include various types of tangible storage media. Examples of non-transitory computer-readable media include magnetic recording media (for example, flexible disks, magnetic tapes, hard disk drives), magneto-optical recording media (for example, magneto-optical disks), CD-ROMs (Read Only Memory), CD-Rs, CD-R / W, semiconductor memory (for example, mask ROM, PROM (Programmable ROM), EPROM (Erasable PROM), flash ROM, RAM (Random Access Memory)) are included. The program may also be supplied to the computer by various types of transitory computer readable media. Examples of transitory computer readable media include electrical signals, optical signals, and electromagnetic waves. The temporary computer-readable medium can supply the program to the computer via a wired communication path such as an electric wire and an optical fiber, or a wireless communication path.

  Note that the present invention is not limited to the above-described embodiment, and can be changed as appropriate without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 10 Monitoring part 11 Address allocation part 100 Wireless LAN access point apparatus 110 Wireless LAN relay apparatus 111 Control part 111a Wireless control part 111b DHCPs control part 111c HTTPs control part 112 Storage part 112a DHCPs effective / invalid state 112b Parent machine connection state 112c Reason for disconnection Information 112d Beacon information 112e BSSID information 112f SSID information 112g Encryption mode information 112h Web information 112i Handset information 113 Network communication unit 120 Wireless LAN communication terminal 210 Wireless LAN relay device

Claims (9)

A wireless LAN relay device that relays radio waves transmitted from a wireless LAN access point device and transmits them to a wireless LAN communication terminal,
A monitoring unit for monitoring a wireless connection state with the wireless LAN access point device;
The monitoring unit, when the wireless connection with the wireless LAN access point device detects that the state of being cut, start the address management server function, address assignment for assigning a communication address to the wireless LAN communication terminal comprises a part, the,
The address allocation unit
Determining whether the factor of the state in which the wireless connection with the wireless LAN access point device is disconnected is a setting change of the wireless LAN access point device;
When it is determined that the factor of the state in which the wireless connection with the wireless LAN access point device is disconnected is a change in the setting of the wireless LAN access point device, the address management server function is activated and the wireless LAN access A wireless LAN relay device that does not activate the address management server function when it is determined that the cause of the state in which the wireless connection with the point device is disconnected is not a setting change of the wireless LAN access point device. The address allocation unit
The wireless LAN relay device according to claim 1, wherein when the BSSID included in the beacon information transmitted from the wireless LAN access point device does not exist, the wireless LAN access point device determines that the power is off. The address allocation unit
The wireless LAN relay device according to claim 1, wherein it is determined whether or not the SSID of the wireless LAN access point device has been changed using an SSID included in beacon information transmitted from the wireless LAN access point device. . The address allocation unit
4. The device according to claim 1, wherein it is determined whether or not the encryption mode of the wireless LAN access point device has been changed using an encryption mode included in beacon information transmitted from the wireless LAN access point device. 5. The wireless LAN relay device according to item 1. The address allocation unit
When the monitoring unit detects that the wireless connection with the wireless LAN access point device is recovered from the disconnected state, the monitoring unit stops the address management server function and assigns a communication address to the wireless LAN communication terminal. The wireless LAN relay device according to claim 1, wherein the wireless LAN relay device is stopped. The address allocation unit
6. The address management server function according to claim 1, wherein, when at least one of the plurality of wireless LAN communication terminals has a Web access function, the address management server function is activated. 7. Wireless LAN relay device. A wireless LAN communication system comprising: a wireless LAN relay device that relays radio waves transmitted from a wireless LAN access point device; and a wireless LAN communication terminal that receives radio waves transmitted from the wireless LAN relay device,
The wireless LAN relay device
A monitoring unit for monitoring a wireless connection state with the wireless LAN access point device;
The monitoring unit, when the wireless connection with the wireless LAN access point device detects that the state of being cut, start the address management server function, address assignment for assigning a communication address to the wireless LAN communication terminal And
The address allocation unit
Determining whether the factor of the state in which the wireless connection with the wireless LAN access point device is disconnected is a setting change of the wireless LAN access point device;
When it is determined that the factor of the state in which the wireless connection with the wireless LAN access point device is disconnected is a change in the setting of the wireless LAN access point device, the address management server function is activated and the wireless LAN access If it is determined that the cause of the state in which the wireless connection with the point device is disconnected is not a setting change of the wireless LAN access point device, the address management server function is not activated,
The wireless LAN communication terminal is
A wireless LAN communication system for connecting to the wireless LAN relay device using a communication address assigned from the wireless LAN relay device. An address assignment method in a wireless LAN relay device that relays radio waves transmitted from a wireless LAN access point device and transmits the radio waves to a wireless LAN communication terminal,
Monitoring the wireless connection state with the wireless LAN access point device;
It is detected that the wireless connection with the wireless LAN access point device is in a disconnected state, and the cause of the state in which the wireless connection with the wireless LAN access point device is disconnected is the setting of the wireless LAN access point device. If it is determined that it is a change, start the address management server function,
Assigning a communication address to the wireless LAN communication terminal ;
It is detected that the wireless connection with the wireless LAN access point device is in a disconnected state, and the cause of the state in which the wireless connection with the wireless LAN access point device is disconnected is the setting of the wireless LAN access point device. An address assignment method that does not activate the address management server function when it is determined that the change is not made . A program to be executed by a computer that relays radio waves transmitted from a wireless LAN access point device and transmits them to a wireless LAN communication terminal,
Monitoring the wireless connection state with the wireless LAN access point device;
It is detected that the wireless connection with the wireless LAN access point device is in a disconnected state, and the cause of the state in which the wireless connection with the wireless LAN access point device is disconnected is the setting of the wireless LAN access point device. If it is determined that it is a change, start the address management server function,
Assigning a communication address to the wireless LAN communication terminal ;
It is detected that the wireless connection with the wireless LAN access point device is in a disconnected state, and the cause of the state in which the wireless connection with the wireless LAN access point device is disconnected is the setting of the wireless LAN access point device. A program that causes a computer to execute that the address management server function is not activated when it is determined that it is not a change .

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