TW202103477A - Access point, control method of access point, and program wherein the access point comprises first and second wireless communication sections and a control section that enables the first and second wireless communication sections to make communication with first and second ESSID - Google Patents

Abstract

The present invention provides an access point, which, when communication is made among multiple wireless communication sections, can suppress interruption of communication in a terminal when one of the wireless communication sections detects a radar signal. The access point comprises: a first wireless communication section, which uses a first frequency band; a second wireless communication section, which uses a second frequency band; and a control section, which enables the first wireless communication section to make communication with first ESSID and enables the second wireless communication section to make communication with second ESSID. When a radar signal is detected in the channel that is being used by the first wireless communication section, the first wireless communication section is caused to stop the communication and the second wireless communication section is put into operation to make communication with the first ESSID and the second ESSID.

Description

Access point, access point control method and program

The invention relates to an access point, an access point control method and program.

Patent Document 1 discloses the following. For the second wireless part that uses the W53 and W56 frequency bands that require dynamic frequency selection (Dynamic Frequency Selection, DFS), when a radar wave is detected in the channel used, Detect the channel in the same frequency band that has not detected radar waves, and switch to the detected channel.

Patent Document 2 discloses the following. The first receiver is used to detect channels in the W53 and W56 frequency bands where no radar waves are detected, and the second receiver is used to monitor the found channels. When used in the communication section When radar waves are detected in the channel, switch to the monitored channel, thereby suppressing the communication interruption period. [Prior Art Literature] [Patent Literature]

Patent Document 1: Japanese Patent Laid-Open No. 2016-19192 Patent Document 2: Japanese Patent No. 6170031

[The problem to be solved by the invention]

However, in an access point that includes two wireless communication parts, when communication is used in both wireless communication parts, if radar waves are detected in one wireless communication part, the channel availability check (CAC) is started. ), the terminal using the wireless communication unit has to interrupt the communication before the CAC ends.

The present invention is made in view of the above-mentioned problems, and its main purpose is to provide a connection that can suppress the interruption of communication in a terminal when radar waves are detected in any one of the wireless communication units when communication is used in a plurality of wireless communication units. Access point, access point control method and program. [Means to solve the problem]

In order to solve the problem, an access point according to an aspect of the present invention includes: a first wireless communication unit that uses a first frequency band; a second wireless communication unit that uses a second frequency band; and a control unit that enables the first wireless communication The part uses the first extended service set identifier (Extended Service Set Identifier, ESSID) communication, so that the second wireless communication part uses the communication using the second ESSID to operate, when the first wireless communication part is used When a radar wave is detected in the channel of, the first wireless communication unit is caused to stop communication, and the second wireless communication unit is caused to operate the communication using the first ESSID and the second ESSID.

In addition, an access point control method according to another aspect of the present invention controls access points that include: a first wireless communication unit that uses a first frequency band; and a second wireless communication unit that uses The second frequency band; the control method of the access point allows the first wireless communication unit to operate the communication using the first ESSID, and the second wireless communication unit to operate the communication using the second ESSID, when in When radar waves are detected in the channel used by the first wireless communication unit, the first wireless communication unit is caused to stop communication, and the second wireless communication unit is made to use the first ESSID and the second ESSID. Communication.

In addition, a program of another aspect of the present invention is used to cause a computer of an access point to function as a control unit including: a first wireless communication unit that uses a first frequency band; and a second wireless communication unit , Use the second frequency band; the control unit causes the first wireless communication unit to operate the communication using the first ESSID, and causes the second wireless communication unit to operate the communication using the second ESSID, when the When radar waves are detected in the channel used by the first wireless communication unit, the first wireless communication unit is caused to stop communication, and the second wireless communication unit is made to communicate using the first ESSID and the second ESSID. Use it. [Effects of the invention]

According to the present invention, when communication is used in a plurality of wireless communication units, the detection of radar waves in any one of the wireless communication units can suppress the interruption of communication in the terminal.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[System Components] Fig. 1 is a block diagram showing a configuration example of an access point 1 according to the embodiment. The access point 1 is a wireless local area network (Local Area Network, LAN) access point, which connects a wireless LAN client (not shown) with a communication network such as a wired LAN. The access point 1 includes: a control unit 10, a wireless communication unit 11, a wireless communication unit 12, a wired communication unit 13, and a memory 20.

The control unit 10 includes a central processing unit (Central Processing Unit, CPU), random access memory (Random Access Memory, RAM), read-only memory (Read Only Memory, ROM), non-volatile memory, and input/ Computer with output interface, etc. The CPU executes information processing in accordance with programs loaded into RAM from ROM or non-volatile memory.

Programs can be supplied via information storage media such as CDs or memory cards, or via communication networks such as the Internet.

The memory 20 stores a configuration file 201 and a MAC address list 202 related to each of the wireless communication unit 11, the wireless communication unit 12 and the wired communication unit 13. The memory 20 may also be included in the control unit 10.

The control unit 10 refers to the MAC address list 202 stored in the memory 20 and bridges two selected from the wireless communication unit 11, the wireless communication unit 12, and the wired communication unit 13.

The use frequency bands of the wireless communication unit 11 and the wireless communication unit 12 are different from each other. In this embodiment, the frequency band used by the first wireless communication unit 11 is W52 (5.2 GHz band) and W53 (5.3 GHz frequency band), and the frequency band used by the second wireless communication unit 12 is W56 (5.6 GHz frequency band).

In W52 and W53, for example, if the channel width is set to 40 MHz, four channels of 36ch, 44ch, 52ch, and 60ch can be used. In W56, six channels of 100ch, 108ch, 116ch, 124ch, 132ch, and 140ch can be used.

In addition, with regard to W53 and W56, so-called DFS (Dynamic Frequency Selection) must be performed. The DFS (Dynamic Frequency Selection) is to transform into other channels without radio interference when radar waves are detected, so as not to affect weather radars and other radars. The system has an impact.

The first wireless communication unit 11 is provided with a band pass filter (Band Pass Filter, BPF) 113, and the BPF 113 includes W52 and W53 in a pass band, but does not include W56. The BPF 113 is interposed between the first wireless communication unit 11 and the antenna 114. W52 and W53 are examples of the first frequency band, and BPF 113 is an example of the first filter.

The second wireless communication unit 12 is provided with a BPF 123, and the BPF 123 includes W56 in the passband, but does not include W52 and W53. The BPF 123 is interposed between the second wireless communication unit 12 and the antenna 124. W56 is an example of the second frequency band, and BPF 123 is an example of the second filter.

In this way, by providing the BPF 113 and the BPF 123 in the wireless communication unit 11 and the wireless communication unit 12, communication can be used in both of the wireless communication units 11 and 12.

As shown in FIG. 2, the configuration file 201 includes ESSID (Service Set Identifier), MAC address, channel, encryption mode, and encryption key for the wireless communication unit 11 and the wireless communication unit 12, respectively.

The ESSID project contains the string used as the ESSID. The MAC address is the MAC address of the wireless communication unit 11 and the wireless communication unit 12 (self-adjusted polling medium access control (APMAC) address). The channel item contains values related to channel selection. In the example shown in the figure, a value indicating “auto” is included to automatically select a channel.

In addition, the configuration file 201 can also include dynamic host configuration protocol (Dynamic Host Configuration Protocol, DHCP) server settings, Institute of Electrical and Electronics Engineers (IEEE) 802.11ac/n mode settings, High throughput 20/40 (High Throughput 20/40, HT20/40) or very high throughput 20/40/80 (Very High Throughput 20/40/80, VHT20/40/80) and other channel width settings, beacons Various settings such as interval setting and guard interval setting.

As shown in Figure 3, in the MAC address list 202 (Cross Layer Medium Access Control (CLMAC) address/client MAC address list), the wireless communication unit 11 and the wireless communication unit 12 respectively include all The MAC address of the connected client (CLMAC address).

The configuration file 201 or the MAC address list 202 may be the respective files of the wireless communication section 11 and the wireless communication section 12, or may be a summary file.

[Mode switch] As shown in FIGS. 4 and 5, the control unit 10 alternatively applies the dual communication mode and the single inspection mode.

In the dual communication mode, the control unit 10 causes the first wireless communication unit 11 to use communication using channels belonging to W52 and W53, and causes the second wireless communication unit 12 to also use communication using channels belonging to W56.

In the single check mode, the control unit 10 causes the first wireless communication unit 11 to use communication using the channels belonging to W52 and W53, and causes the second wireless communication unit 12 to check the presence of radar waves on the channels belonging to W56.

Alternatively, in the single inspection mode, the control unit 10 may cause the second wireless communication unit 12 to use communication using a channel belonging to W56, and the first wireless communication unit 11 to check the presence of radar waves on the channels belonging to W52 and W53.

The control unit 10 switches between the dual communication mode and the single inspection mode in response to the user's operation input. Specifically, the control unit 10 outputs the page data for displaying the setting display image 3 shown in FIG. 6 to an external display device not shown, and accepts operation input.

As shown in FIG. 6, the setting display image 3 includes a first device description 31, a second device description 32, a first setting description 33, a second setting description 34, and a pointer 35. The first device expression 31 corresponds to the first wireless communication unit 11, and the second device expression 32 corresponds to the second wireless communication unit 12.

The first setting expression 33 is configured such that the setting of the first wireless communication unit 11 can be switched by "for communication" indicating the use of communication and "for inspection" indicating the presence or absence of radar waves.

Similarly, the second setting expression 34 is also configured so that the setting of the second wireless communication unit 12 can be switched between "for communication" and "for inspection." The first setting expression 33 and the second setting expression 34 are displayed in the form of a drop-down list, for example.

The index 35 moves on the setting display image 3 in response to the user's operation input, and realizes the switching of the settings in the first setting expression 33 and the second setting expression 34.

Furthermore, the setting display image 3 includes a convergent one selection item 36 for selecting whether to converge in one place during DFS. The convergent selection item 36 is displayed in the form of a check box, for example. The details of the convergence in DFS will be described later.

FIG. 7 is a flowchart showing an example of the sequence of mode switching performed by the control unit 10. The control unit 10 outputs the setting display image 3 shown in FIG. 6 (S11), and accepts the user's operation input (S12).

When one of the first setting expression 33 and the second setting expression 34 is set as "for inspection" in the setting display image 3 (S13: YES), the control unit 10 changes to the wireless communication unit 11, wireless One of the communication parts 12 uses a "single check mode" in which communication, and the other checks the presence or absence of radar waves (S14).

In contrast, when both the first setting expression 33 and the second setting expression 34 are set to "for communication" in the setting display image 3 (S13: NO), the control unit 10 changes to the wireless communication unit 11 , The wireless communication part 12 uses the "dual communication mode" of communication (S15).

Furthermore, when the one place selection item 36 is selected in the setting display image 3 (S16: YES), the control unit 10 gathers one place when DFS is set (S17). The details of the convergence in DFS will be described later.

[DFS operation] FIG. 8 is a diagram for explaining the DFS operation when the first wireless communication unit 11 detects radar waves when the "dual communication mode" is realized and "converges in one place when DFS" is set. FIG. 9 is a flowchart showing an example of the sequence of the access point control method of the embodiment executed by the control unit 10 in order to realize the DFS operation.

First, the control unit 10 causes both the wireless communication unit 11 and the wireless communication unit 12 to operate communication (S21).

Specifically, the control unit 10 causes the first wireless communication unit 11 to perform communication using a channel (for example, 56ch) selected from one of a plurality of channels belonging to W52 and W53. In addition, the control unit 10 causes the first wireless communication unit 11 to perform communication using the first ESSID (for example, xxxx-1) and the first MAC address (for example, XX-XX-XX-A1).

In addition, the control unit 10 causes the second wireless communication unit 12 to perform communication using a channel (for example, 104ch) selected from one of a plurality of channels belonging to W56. In addition, the control unit 10 causes the second wireless communication unit 12 to perform communication using a second ESSID (for example, xxxx-2) and a second MAC address (for example, XX-XX-XX-A2).

The wireless communication unit 11 and the wireless communication unit 12 perform online monitoring (In-Service Monitoring, ISM) for the presence or absence of radar waves while using communication.

When a radar wave is detected in the channel used by the first wireless communication unit 11 (S22: Yes), the control unit 10 stops the first wireless communication unit 11 from communicating, and performs a check on the radar wave on the channels belonging to W52 and W53. The presence or absence of CAC (channel availability check) (S23).

Then, the control unit 10 causes the second wireless communication unit 12 to use the settings of the first ESSID and the like used by the first wireless communication unit 11 before detecting the radar wave in addition to the settings of the second ESSID and the like (S24). This operation is referred to as "converging in one place in DFS". In addition, the execution order of S23 and S24 can also be reversed.

Specifically, the control unit 10 causes the second wireless communication unit 12 to use the first ESSID (xxxx-1) and the second ESSID (xxxx-2), and use the first MAC address (XX-XX-XX-A1) Communication with the second MAC address (XX-XX-XX-A2).

As shown in FIG. 10, in the configuration file 201 of the second wireless communication unit 12 when the "Convergence in DFS" is executed, except for the second ESSID (xxxx-2) used by the second wireless communication unit 12 before then In addition to the second MAC address (XX-XX-XX-A2), it further includes the first ESSID (xxxx-1) and the first MAC address (XX-XX-XX-A1) used by the first wireless communication unit 11 ).

In addition, the control unit 10 causes the second wireless communication unit 12 to use security settings such as an encryption key used by the first wireless communication unit 11 before detecting radar waves. As shown in FIG. 10, in the configuration file 201 of the second wireless communication unit 12 when "Converged in one place during DFS" is executed, in addition to the security settings used by the second wireless communication unit 12 before this, it further includes the first An encryption key used by the wireless communication unit 11.

In addition, the control unit 10 causes the second wireless communication unit 12 to use the MAC address list (CLMAC address list) used by the first wireless communication unit 11 before detecting radar waves. Specifically, as shown in FIG. 11, in the MAC address list 202 of the second wireless communication unit 12 when the "Convergence in DFS" is executed, the MAC address list included in the first wireless communication unit 11 is copied (refer to FIG. 3) The MAC address of the client.

In this way, when radar waves are detected in the channel used by the first wireless communication unit 11, the second wireless communication unit 12 is made to use the first ESSID used by the first wireless communication unit 11 and other settings (ie, perform "DFS When the first wireless communication unit 11 is transferred to CAC, the user terminal using the first wireless communication unit 11 can also use the second wireless communication unit 12 to continue communication. Therefore, it is possible to suppress the interruption of communication in the user side using the first wireless communication unit 11.

In addition, in this example, the ESSID, MAC address (APMAC address), security settings, and MAC address list (CLMAC address list) are the objects of "convergence in DFS", but it is not limited to this, as long as at least ESSID can achieve the stated purpose as the object of "converging in one place in DFS". Furthermore, by combining one or more other projects, the handover period of the user terminal from the first wireless communication unit 11 to the second wireless communication unit 12 can be shortened.

Returning to the description of FIG. 9, when CAC has been completed, that is, when the CAC has been found and a channel without radar waves is secured (S25: Yes), the control unit 10 makes the first wireless communication unit 11 use CAC only The new channel (for example, 64ch) without radar waves and the communication of the settings of the first ESSID and the like are confirmed (S26), and the second wireless communication unit 12 is stopped using the settings of the first ESSID and the like (S27). In addition, the execution order of S26 and S27 can also be reversed.

Specifically, the control unit 10 causes the first wireless communication unit 11 to use the first ESSID (xxxx-1) and the first MAC address (XX-XX-XX- A1), security settings, and MAC address list.

In addition, the control unit 10 stops the second wireless communication unit 12 from using the first ESSID (xxxx-1) and the first MAC address (XX-XX-XX-A1) used by the first wireless communication unit 11 before detecting radar waves. ), security settings, and MAC address list.

That is, when the CAC is completed, the control unit 10 returns the settings of the first ESSID and the like used by the first wireless communication unit 11 before detecting radar waves from the second wireless communication unit 12 back to the first wireless communication unit 11.

It is not limited to this, and as shown in FIG. 12, the settings of the first ESSID etc. may be left in the second wireless communication unit 12 and the settings of the second ESSID etc. may be transferred to the first wireless communication unit 11. Specifically, when CAC is completed, the control unit 10 can also make the first wireless communication unit 11 use the new channel (for example, 64ch) and the second ESSID (xxxx-2) that have been confirmed to be free of radar waves by CAC. , And the second MAC address (XX-XX-XX-A2), etc., and stop the second wireless communication unit 12 from using the second ESSID (xxxx-2) and the second MAC address (XX-XX- XX-A2) and other settings.

In addition, when a radar wave is detected in the channel used by the first wireless communication unit 11 (S22: Yes), the control unit 10 may also notify the user terminal using the first wireless communication unit 11 of the second wireless communication target to be transferred. Frequency band information of the communication unit 12. In addition, when the CAC is completed (S25: Yes), the control unit 10 may notify the user terminal using the second wireless communication unit 12 of the frequency band information of the first wireless communication unit 11 to be the transfer target. Accordingly, it is possible to further shorten the handover period.

[Another order example] FIG. 13 is a diagram for explaining another example of the sequence of the method of controlling the access point. In this example, the wireless communication unit 11 and the wireless communication unit 12 are configured in a way that can be switched between valid and invalid for the first ESSID (for example, xxxx-1). In addition, they are configured for the second ESSID (for example, xxxx-2). ) It can also be used to switch between valid and invalid methods.

First, the control section 10 sets the use of the first ESSID (xxxx-1) to be valid in the first wireless communication section 11, sets the use of the second ESSID (xxxx-2) to be invalid, and sets the use of the second ESSID (xxxx-2) to be invalid in the second wireless communication section 11. In 12, the use of the first ESSID (xxxx-1) is set to be invalid, and the use of the second ESSID (xxxx-2) is set to be effective, so that both the wireless communication unit 11 and the wireless communication unit 12 operate communication.

In this state, when radar waves are detected in the channel used by the first wireless communication unit 11, the control unit 10 causes the first wireless communication unit 11 to perform CAC, and in the second wireless communication unit 12, the first ESSID (Xxxx-1) and the second ESSID (xxxx-2) are both set to be valid.

After that, when the CAC is completed, the control unit 10 makes the use of the first ESSID (xxxx-1) valid in the first wireless communication unit 11 and invalidates the use of the second ESSID (xxxx-2). And in the second wireless communication unit 12, the use of the first ESSID (xxxx-1) is set to be invalid, and the use of the second ESSID (xxxx-2) is set to be effective, thereby returning to the original state.

Even with this operation, the same effect as the above-described embodiment can be obtained. In addition, only the ESSID is mentioned here, but it can be configured so that other settings such as the MAC address can be switched in the same way.

The embodiments of the present invention have been described above, but the present invention is not limited to the embodiments described above, and it is of course possible for those skilled in the art to make various changes.

1: access point 3: Set the display image 10: Control Department 11: The first wireless communication department 12: The second wireless communication department 13: Wired Communication Department 20: memory 31, 32: machine representation 33, 34: Setting expression 35: pointer 36: Gathering together to choose items 113, 123: BPF 114, 124: Antenna 201: Setting file 202: MAC address list S11～S17, S21～S27: steps

Fig. 1 is a block diagram showing a configuration example of an access point according to an embodiment. Fig. 2 is a diagram showing an example of a profile. Fig. 3 is a diagram showing an example of a Medium Access Control (MAC) address list. Fig. 4 is a diagram for explaining a dual communication mode. Fig. 5 is a diagram for explaining a single inspection mode. Fig. 6 is a diagram for explaining the setting of a display image. Fig. 7 is a flowchart showing an example of the sequence of mode switching. Fig. 8 is a diagram for explaining a sequence example of a method of controlling an access point. Fig. 9 is a flowchart showing a procedure example of a method of controlling an access point. Fig. 10 is a diagram showing an example of a profile. Fig. 11 is a diagram showing an example of a MAC address list. FIG. 12 is a diagram for explaining another example of the sequence of the method of controlling the access point. FIG. 13 is a diagram for explaining another example of the sequence of the method of controlling the access point.

1: access point

10: Control Department

11: The first wireless communication department

12: The second wireless communication department

13: Wired Communication Department

20: memory

113, 123: BPF

114, 124: Antenna

201: Setting file

202: MAC address list

Claims (13)

An access point including: The first wireless communication unit uses the first frequency band; The second wireless communication unit uses the second frequency band; and The control unit causes the first wireless communication unit to operate the communication using the first extended service set identifier, and causes the second wireless communication unit to operate the communication using the second extended service set identifier, when in all When a radar wave is detected in the channel used by the first wireless communication unit, the first wireless communication unit is caused to stop communication, so that the second wireless communication unit uses the first extended service set identifier and the The second extended service set identifier is used for communication. The access point according to claim 1, wherein when a radar wave is detected in a channel used by the first wireless communication unit, the control unit causes the first wireless communication unit to belong to the first wireless communication unit. The channel of the frequency band performs a check for the presence or absence of radar waves. The access point according to claim 2, wherein when the inspection has ended, the control unit causes the first wireless communication unit to use a channel for which no radar waves have been confirmed by the inspection, and the The first extended service set identifier is used for communication. The access point according to claim 3, wherein when the check has ended, the control unit causes the second wireless communication unit to stop using the first extended service set identifier. The access point according to claim 2, wherein when the inspection has ended, the control unit causes the first wireless communication unit to use a channel for which no radar waves have been confirmed by the inspection, and the The second extended service set identifier is used for communication. The access point according to claim 5, wherein when the check has ended, the control unit causes the second wireless communication unit to stop using the second extended service set identifier. The access point according to any one of claim 1 to claim 6, wherein the control unit causes the first wireless communication unit to operate communication using a first media access control address, Enabling the second wireless communication unit to operate the communication using the second media access control address, When a radar wave is detected in the channel used by the first wireless communication unit, the first wireless communication unit is caused to stop communication, and the second wireless communication unit is made to use the first media access control bit Communication between the address and the second media access control address. The access point according to any one of claim 1 to claim 6, wherein when a radar wave is detected in a channel used by the first wireless communication unit, the control unit causes the second wireless communication unit to The communication unit uses the client media access control address list used by the first wireless communication unit before detecting radar waves. The access point according to any one of claim 1 to claim 6, wherein when a radar wave is detected in a channel used by the first wireless communication unit, the control unit causes the second wireless communication unit to The communication unit uses the security setting used by the first wireless communication unit before detecting radar waves. The access point according to any one of claim 1 to claim 6, wherein the second wireless communication unit is configured to be able to switch the validity and invalidity of the use of the first extended service set identifier, When a radar wave is detected in the channel used by the first wireless communication unit, the control unit switches the use of the first extended service set identifier by the second wireless communication unit from invalid to valid. The access point according to any one of claim 1 to claim 6, further including: The first filter is provided in the first wireless communication unit, and includes the first frequency band in the pass band, but does not include the second frequency band; and The second filter is provided in the second wireless communication unit, and includes the second frequency band in the pass band, but does not include the first frequency band. A method for controlling an access point, the access point includes: The first wireless communication unit uses the first frequency band; and The second wireless communication unit uses the second frequency band; The method for controlling the access point controls the access point as follows: Enabling the first wireless communication unit to operate the communication using the first extended service set identifier, Enabling the second wireless communication unit to operate the communication using the second extended service set identifier, When a radar wave is detected in the channel used by the first wireless communication unit, the first wireless communication unit is caused to stop communication, and the second wireless communication unit is made to use the first extended service set identifier Use the communication with the second extended service set identifier. A program used to make the computer of an access point function as a control unit as follows, the access point includes: The first wireless communication unit uses the first frequency band; and The second wireless communication unit uses the second frequency band; The control unit causes the first wireless communication unit to operate communication using the first extended service set identifier, Enabling the second wireless communication unit to operate the communication using the second extended service set identifier, When a radar wave is detected in the channel used by the first wireless communication unit, the first wireless communication unit is caused to stop communication, and the second wireless communication unit is made to use the first extended service set identifier Use the communication with the second extended service set identifier.

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