JP5327896B2 - Wireless LAN access point and wireless terminal connection maintaining method - Google Patents

Description

  The present invention relates to a wireless LAN access point connected to a wireless terminal via a wireless transmission path and a connection maintaining method for the wireless terminal.

  The wireless LAN access point and the wireless terminal perform wireless connection using an SSID (Service Set IDentifier) (see, for example, Patent Document 1).

  When the wireless setting of the wireless LAN access point is changed, the wireless terminal connected with the setting before the change is disconnected due to the setting mismatch and becomes in a communication disabled state. For example, in the case where there is a wireless LAN access point and a user who is accessing the Internet via the wireless LAN, if the setting of the wireless LAN access point is changed by another user or the like, the communication of the user who has used the Internet is It is interrupted and the subsequent work is interrupted.

JP 2010-178175 A

  It is not preferable for wireless LAN users to be interrupted during communication, and it is also preferable for the administrator of a wireless LAN access point to consider users who are using the wireless LAN access point when changing settings. Absent.

  Therefore, the present invention provides a wireless LAN access point and a wireless terminal that can maintain a connection with a wireless terminal that has been connected with the setting content before the change when the setting of the SSID of the wireless LAN access point is changed An object of the present invention is to provide a connection maintaining method.

  A wireless LAN access point according to the present invention is a wireless LAN access point that is connected to a wireless terminal via a wireless transmission path, and is a connection that stores storage means for storing an SSID and controls connection with the wireless terminal based on the SSID. Management means, and the connection management means maintains a connection with the wireless terminal when there is a wireless terminal that performs connection control based on the SSID before the change when the SSID is changed. And

  The connection maintaining method according to the present invention is a connection maintaining method in a wireless LAN access point connected to a wireless terminal via a wireless transmission path, and after connecting the wireless terminal based on the SSID stored in the storage means, the SSID Even after the change is made, the connection with the wireless terminal that has performed connection control based on the SSID before the change is maintained.

  The connection maintenance program according to the present invention is a connection maintenance program at a wireless LAN access point connected to a wireless terminal via a wireless transmission path, and connects the wireless terminal to a computer based on the SSID stored in the storage means. And a process for maintaining a connection with a wireless terminal that has performed connection control based on the SSID before the change even after the SSID is changed.

  According to the present invention, when the setting of the SSID of the wireless LAN access point is changed, after changing another wireless terminal while maintaining the connection with the wireless terminal being connected with the setting content before the change. You can connect with the setting contents.

1 is a block diagram showing a first embodiment of a wireless LAN access point of the present invention. It is explanatory drawing which shows an example of operation | movement of the 1st Embodiment of this invention. It is a sequence diagram which shows operation | movement of the 1st Embodiment of this invention. It is a sequence diagram which shows an example of operation | movement of the wireless LAN access point 100 when not applying this invention. 6 is a flowchart showing an operation of the connection management unit 112 when the setting of the wireless LAN access point 100 is changed. It is a flowchart which shows operation | movement of the connection management part 112 when there exists a connection request during operation | movement with a multi-SSID function. It is a flowchart which shows operation | movement in case the connection management part 112 deletes old setting SSID. It is a block diagram which shows the principal part of this invention.

Embodiment 1. FIG.
A first embodiment of the present invention will be described below with reference to the drawings.

  FIG. 1 is a block diagram showing a first embodiment of a wireless LAN access point of the present invention. The wireless LAN access point 100 connected to the wireless LAN slave device 300 via the wireless transmission path includes a wireless LAN interface 110.

  The wireless LAN interface 110 includes a connection setting registration unit 111 and a connection management unit 112. The wireless LAN interface 110 has a multi-SSID function. The multi-SSID function is a function that allows a plurality of SSIDs to be assigned to a wireless LAN access point, and that each SSID can be accessed simultaneously from a wireless terminal.

  The connection setting registration unit 111 stores one or more pieces of connection setting information. The connection setting information includes the SSID and the encryption method and encryption key information associated with the SSID.

  The connection management unit 112 manages the state of the wireless terminal connected to the wireless LAN access point 100. In addition, when there is a request for changing the SSID, the connection management unit 112 adds connection setting information to the connection setting registration unit 111 or deletes connection setting information stored in the connection setting registration unit 111. Or The SSID change request is made by the administrator of the wireless LAN access point 100 via a management terminal connected to the wireless LAN access point 100, for example. Note that the connection management unit 112 can be realized by a microcomputer or the like that operates according to a program.

  The wireless LAN slave device 300 is a wireless terminal. The wireless LAN slave device 300 is wirelessly connected to the wireless LAN access point 100 based on information corresponding to the connection setting information stored in the connection setting registration unit 111.

  Next, the operation of this embodiment will be described with reference to FIGS.

  FIG. 2 is an explanatory diagram showing an example of the operation of the first exemplary embodiment of the present invention. The state (a) shows the initial state of the wireless LAN access point 100. In the state (a), the wireless LAN access point 100 communicates with the wireless LAN slave device 300 using the SSID “A” of the connection setting information 401 stored in the connection setting registration unit 111, and sets the communication network 200. Internet access and so on through. As shown in FIG. 2, the state (b) is a state after a request for changing the SSID and the encryption method is made from the state (a) by the administrator of the wireless LAN access point or the like. In the state (b), the wireless LAN access point 100 uses the SSID “A” of the connection setting information 401 to continue communication with the wireless LAN slave device 300, while the SSID “ B ”is newly used for communication with the wireless LAN slave device 301.

  With reference to FIG. 3, a case will be described in which the wireless setting of the wireless LAN access point 100 is changed from the state (a) and the state shifts to the state (b).

  FIG. 3 is a sequence diagram showing the operation of the first exemplary embodiment of the present invention. The wireless LAN slave device 300 is wirelessly connected to the SSID “A” of the wireless LAN access point 100. Then, the wireless LAN slave device 300 is in a state belonging to the wireless LAN access point 100 (step S302).

  In this state, when the wireless LAN access point 100 receives the SSID setting change request (step S303), the wireless LAN access point 100 belongs to the SSID “A”. ”Is not deleted. Then, the connection setting information 402 including the SSID “B” is created by the multi-SSID function while leaving the connection setting information 401 (step S304).

  Thereafter, two SSIDs operate simultaneously. Note that “SSID operates simultaneously” means that communication can be performed based on one SSID and communication can be performed based on the other SSID. Since the connection setting information 401 has not been deleted, the wireless LAN slave device 300 can continue to communicate. In addition, the wireless LAN slave device 301 that is wirelessly connected to the SSID “B” of the wireless LAN access point 100 can also communicate with the wireless LAN access point 100 (step S306).

  When the communication of the wireless LAN slave device 300 is completed and a disconnection request is sent from the wireless LAN slave device 300 (step S307), the wireless LAN access point 100 deletes the connection setting information 401 including the SSID “A”. (Step S308).

  Here, the operation when the present invention is not applied will be described with reference to FIG.

  FIG. 4 is a sequence diagram showing an example of the operation of the wireless LAN access point 100 when the present invention is not applied. As shown in FIG. 4, the connection setting information 401 including the SSID “A” is deleted immediately after the setting change of the wireless LAN access point 100 in step S403 (step S404). Is forcibly disconnected (step S405). The processes in steps S401 and S402 are the same as the processes in steps S301 and S302 shown in FIG. 3, and the processes in steps S406, S407, and S408 are the same as those in steps S304, S305, and S302 shown in FIG. This is the same process as the process of S306.

  Next, the operation of the connection management unit 112 when the setting of the wireless LAN access point 100 is changed will be described with reference to FIG.

  FIG. 5 is a flowchart showing the operation of the connection management unit 112 when the setting of the wireless LAN access point 100 is changed.

  If the setting of the wireless LAN access point 100 is changed while the wireless LAN access point 100 is in operation (step S501), the connection management 112 will be referred to as the SSID (hereinafter referred to as the old setting SSID) that is the target of the setting change. ) To determine whether there is a wireless LAN slave device belonging to (step S502). If there is no belonging wireless LAN slave unit (No in step S502), the connection setting information including the old setting SSID is deleted from the connection setting registration unit 111, and the new SSID after the setting change (hereinafter referred to as the new setting SSID). Connection setting information is created and stored in the connection setting registration unit 111 (step S503). If there is an attached wireless LAN slave device (Yes in step S502), connection setting information including the new setting SSID is created, and the multi-SSID function is used without deleting the connection setting information including the old setting SSID. Then, the old setting SSID and the new setting SSID are operated simultaneously (step S504).

  Next, referring to FIG. 6, when a connection request is made to the wireless LAN access point 100 from the wireless LAN slave unit 301 when the old setting SSID and the new setting SSID are simultaneously operated in step S <b> 504. The operation of the connection management unit 112 will be described.

  FIG. 6 is a flowchart showing the operation of the connection management unit 112 when there is a connection request during operation with the multi-SSID function.

  Whether there is a connection request for the newly set SSID of the wireless LAN access point 100 when the connection management unit 112 receives a connection request from the wireless LAN slave device 301 which is a wireless LAN slave device other than the wireless LAN slave device 300. Is confirmed (step S601). If the connection request is for the newly set SSID of the wireless LAN access point 100 (Yes in step S601), the connection management unit 112 accepts the connection request and permits the connection to the newly set SSID of the wireless LAN slave unit 301 (step S601). S602). If the connection request is for the old setting SSID (No in step S601), the connection management unit 112 rejects the connection request and prevents the wireless LAN slave device 301 from being connected to the old setting SSID (step S603). ).

  Next, with reference to FIG. 7, the operation when the connection management unit 112 deletes the connection setting information including the old setting SSID when the old setting SSID and the new setting SSID are simultaneously operated in step S504 will be described. To do.

  FIG. 7 is a flowchart showing an operation when the connection management unit 112 deletes the old setting SSID.

  The connection management unit 112 checks whether or not there is a disconnection request from the wireless LAN slave device belonging to the old setting SSID of the wireless LAN access point 100 (step S701). If there is a disconnection request from the wireless LAN slave device (Yes in step S701), the connection management unit 112 disconnects the old wireless LAN slave device that has made the disconnection request from the old setting SSID (step S702), and then the old setting SSID. The number of the wireless LAN slaves belonging to is counted, and it is confirmed whether there are any other wireless LAN slaves belonging to the old set SSID (step S703).

  If it is confirmed in step S703 that there is no other wireless LAN slave device belonging to the old setting SSID (Yes in step S703), the connection setting information including the old setting SSID is deleted from the connection setting registration unit 111. (Step S704). If there is even one wireless LAN slave unit belonging to the old setting SSID (No in step S703), the old setting SSID and the new setting SSID are not deleted without deleting the connection setting information including the old setting SSID. Continue to operate simultaneously.

  As described above, according to this embodiment, even when there is a wireless LAN slave unit belonging to the old setting SSID when the setting of the wireless LAN access point 100 is changed, the wireless LAN belonging to the old setting SSID is present. While maintaining the communication of the child device, another wireless LAN child device can be attributed to the newly set SSID.

  In this embodiment, the case where the administrator of the wireless LAN access point 100 makes a setting change request for the wireless LAN access point 100 has been described as an example. However, the wireless LAN slave unit uses the WPS function to access the wireless LAN. The present invention can also be applied to a case where the SSID of the point 100 is changed to another SSID and reconnected. In this case, the wireless LAN access point 100 can connect the wireless LAN slave device with the SSID after the change while maintaining the connection of the other wireless LAN slave device belonging to the SSID before the change.

  In addition, the wireless LAN access point 100 may include a setting function for determining whether to execute processing for confirming the presence / absence of a wireless LAN slave device belonging to the old setting SSID in step S502. According to such a configuration, if the setting of step S502 is not executed when the wireless LAN cipher is decrypted, all the wireless LAN slaves belonging to the old setting SSID are forced. Can be cut off.

  In the present embodiment, the SSID has been described as a setting change target. However, it is preferable that an encryption method and an encryption key are included in the setting change target together with the SSID.

  In this embodiment, the case where two SSIDs of the old setting SSID and the new setting SSID operate simultaneously has been described as an example. However, the number of SSIDs set in the wireless LAN access point 100 is not limited to two. There may be.

  FIG. 8 is a block diagram showing a main part of the wireless LAN access point according to the present invention. As illustrated in FIG. 8, a storage unit 11 that is a wireless LAN access point connected to a wireless terminal via a wireless transmission path and stores an SSID (in the embodiment, realized by a connection setting registration unit 111). Based on the SSID, connection management means 12 (in the embodiment, realized by the connection management unit 112) that controls connection with the wireless terminal 30 (in the embodiment, realized by the wireless LAN slave device 300). The connection management means 12 maintains the connection with the wireless terminal when there is a wireless terminal that performs connection control based on the SSID before the change when the SSID is changed. To do.

  In the above embodiment, the following wireless LAN access point is also disclosed.

  When changing the SSID, the connection management unit 12 does not delete the SSID before the change from the storage unit 11, but changes when there is a disconnection request from the wireless terminal that has performed connection control based on the SSID before the change. A wireless LAN access point that deletes the previous SSID from the storage means 12.

  The connection management unit 12 is a wireless LAN access point that deletes the SSID before the change from the storage unit 11 when the connection with all the wireless terminals that have performed connection control based on the SSID before the change is disconnected.

  After the SSID is changed, the connection management unit 12 controls the connection with the wireless terminal that has newly requested a connection based on the changed SSID even if the SSID before the change is stored in the storage unit 11. Wireless LAN access point.

  The connection management unit 12 is a wireless LAN access point that rejects a new connection request based on the SSID before the change after changing the SSID.

DESCRIPTION OF SYMBOLS 10, 100 Wireless LAN access point 11 Memory | storage part 12 Connection management means 30 Wireless terminal 110 Wireless LAN interface 111 Connection setting registration part 112 Connection management part 200 Communication network 300, 301 Wireless LAN subunit | mobile_unit 401, 402 Connection setting information

Claims (7)

A wireless LAN access point connected to a wireless terminal via a wireless transmission path,
Storage means for storing the SSID;
Connection management means for controlling connection with the wireless terminal based on the SSID,
The connection management means maintains a connection with the wireless terminal when there is a wireless terminal that performs connection control based on the SSID before the change when the SSID is changed. point. When changing the SSID, the connection management means does not delete the SSID before the change from the storage means, and when there is a disconnection request from the wireless terminal that performs connection control based on the SSID before the change, the connection management means The wireless LAN access point according to claim 1, wherein the SSID is deleted from the storage unit. 3. The wireless LAN access according to claim 2, wherein the connection management unit deletes the SSID before the change from the storage unit when the connection with all the wireless terminals that have performed connection control based on the SSID before the change is disconnected. point. The connection management unit controls the connection with the wireless terminal that has newly made a connection request based on the SSID after the change even if the SSID before the change is stored in the storage unit after the SSID is changed. The wireless LAN access point according to claim 2 or 3. The wireless LAN access point according to any one of claims 1 to 4, wherein the connection management unit rejects a new connection request based on the SSID before the change after changing the SSID. A connection maintenance method in a wireless LAN access point connected to a wireless terminal via a wireless transmission path,
After connecting a wireless terminal based on the SSID stored in the storage unit, the connection with the wireless terminal that has performed connection control based on the SSID before the change is maintained even after the SSID is changed. Method. A connection maintenance program in a wireless LAN access point connected to a wireless terminal via a wireless transmission path,
On the computer,
Processing for connecting a wireless terminal based on the SSID stored in the storage means;
The connection maintenance program for performing the process for maintaining the connection with the wireless terminal which performed connection control based on the SSID before the change even after changing the SSID.

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