JP7356186B1 - Access points, investigation log acquisition method, and investigation log acquisition program - Google Patents

Abstract

[Problem] To enable only the acquisition of investigation logs from an access point without connecting to a network.
[Solution] The access point includes a status management unit that measures the radio wave condition of a received signal including wireless data received by wireless scanning and stores the measured scan data in a database, and a status management unit that measures the radio wave condition of a received signal including wireless data received by wireless scanning, and stores the scan data stored in the database wirelessly. and an investigation log storage database for storing investigation logs for the console. The control unit of the access point controls to transmit the investigation log stored in the investigation log storage database to the wireless terminal that sent the connection request, when the connection request received as the received signal is an SSID for a wireless console. do.
[Selection diagram] Figure 1

Description

The present invention relates to an access point using a wireless LAN (Local Area Network), an investigation log acquisition method, and an investigation log acquisition program.

Recently, with the spread of smartphones and tablet terminals, the number of communications using wireless LAN has increased explosively over the past few years. Currently, a large number of wireless LANs are used in front of stations, large mass retailers, department stores, etc.

By the way, in wireless LAN, a method called CSMA/CA (Carrier Sense Multiple Access/Collision Avoidance) is adopted as a medium access control method. CSMA/CA is adopted as a communication procedure in the wireless LAN communication standards IEEE802.11a, 802.11b, and 802.11g. With this CSMA/CA mechanism, before starting communication, a wireless communication terminal receives surrounding radio waves and checks whether there are other wireless communication terminals currently communicating on the same channel (Carrier Sense). Starts communication when the wireless communication terminal is not communicating (Multiple Access).

For example, suppose there are many other wireless communication terminals using the same channel. In this case, CSMA/CA first checks whether there is any other wireless communication terminal with which each wireless communication terminal is currently communicating. In CSMA/CA, when the communication of another wireless communication terminal is confirmed, the own wireless communication terminal waits for a random length of time, and after the waiting time elapses, it resumes the current communication. Check whether there are other wireless communication terminals present (Collision Avoidance).

For this reason, there have been cases in which users of wireless communication terminals have complained that communication is not completed easily.

Patent Document 1 discloses a technology that efficiently measures indicators indicating the quality of communication conditions in locations where users are likely to use wireless LAN, and allows an operation manager to understand the measurement results without delay. .

In the wireless terminal device disclosed in Patent Document 1, it is determined whether the wireless terminal device is moving or not, and an index indicating the quality of the wireless LAN communication state when it is determined that the wireless terminal device is not moving is determined. This function realizes the function of forwarding to the destination.

In Patent Document 1, as specific examples of indicators indicating the quality of the communication state, radio wave interference with an access point using the same channel, the size of communication power (field strength) of communication radio waves transmitted from the access point, and access It lists the CRC (Cyclic Redundancy Check) error rate and frame retransmission rate of frames transmitted from the point.

The wireless terminal device disclosed in Patent Document 1 transmits a MAC (Media Access Control) frame to an access point and receives the MAC frame transmitted from the access point. Furthermore, the wireless terminal device has a communication power function that measures communication power transmitted from a wireless LAN access point. Using this communication power function, a site survey of a wireless LAN installed at the work place of a user of the wireless terminal device (that is, measurement of the quality of the communication state of the wireless LAN) is realized. The wireless terminal device includes an acceleration sensor, a movement determination unit, a time measurement unit, a measurement control unit, a wireless control unit, a communication power measurement unit, a BSSID (Basic Service Set Identifier) determination unit, and a measurement unit to realize the site survey. It has a result recording means, a mail transmission control section, a mail transmission section, and a mail destination information holding means. The BSSID determination unit outputs information indicating from which access point the input MAC frame was transmitted to the measurement control unit. The BSSID determination section reads the address (BSSID) of the access point included in the header section of the MAC frame given from the decoding section, and outputs the BSSID to the measurement control section as information indicating the transmission source of the MAC frame.

Further, Patent Document 2 discloses a technical idea regarding a site survey method. Patent Document 2 states, ``In a wireless LAN system, an operation called a site survey is performed when an access point (hereinafter referred to as "AP") is installed. '' and ``Site survey is the work of investigating the wireless LAN communication environment around the AP installation location in order to set the optimal channel for the AP.''

The wireless LAN system disclosed in Patent Document 2 includes a controller as a control device, multiple APs, STAs as multiple terminals, and a hub. The STA includes a memory, a communication section, and a control section. The control section includes a memory management section and a scanning section.

In Patent Document 2, when establishing a link with an AP in a wireless LAN network to be connected, the scanning unit of the STA first performs a scanning process to check what kind of APs are present in the vicinity. In the scanning process, the scanning unit sequentially sends probe requests over all available channels over broadband, and receives probe responses from nearby APs existing on the channels. As a result, the scanning unit acquires the wireless LAN network identification ID (hereinafter referred to as "SSID") and MAC address (hereinafter referred to as "BSSID") set in the probe response as AP information of nearby APs. Furthermore, the electric field strength (hereinafter referred to as "RSSI (Received Signal Strength Indicator)") when a probe response is received can be measured and acquired. The memory management unit of the STA stores the AP information of the external AP obtained through the scanning process performed by the scanning unit in the memory as the external AP information of the connection channel of the AP that establishes the link. A collection unit of the controller collects external AP information from each SAT. Specifically, the collection unit requests each STA to send external AP information, and collects external AP information from each STA. The external AP information collected here will be stored in the memory by the memory management unit for each connection channel currently used by the AP.

In this manner, in Patent Document 2, each terminal (each STA) acquires information on nearby APs through a scanning process, and a control device (controller) collects information on external APs of each terminal (each STA).

Patent Document 3 discloses a communication system that can easily collect real-time log information after a failure occurs. The communication system disclosed in Patent Document 3 includes a communication device, a first base station, a log collection terminal, a second base station, and a LAN.

The communication device is a communication device capable of establishing a wireless communication link with the first base station. Wireless communication is performed in the wireless communication link using a predetermined SSID (Service Set Identifier) and a predetermined encryption method. Wireless communication is realized, for example, by a wireless LAN that complies with IEEE802.11a, b, g, n standards, etc. The communication device has a function of broadcasting and transmitting its own log information in a beacon frame using detection of a specific SSID as a trigger.

The first base station is a base station that can establish a wireless communication link with a communication device. The first base station can connect to another network (for example, an external network such as the Internet) through the LAN, and can relay communication between the communication device and the other network. The first base station is, for example, a wireless access point including a wireless circuit module.

The log collection terminal is a terminal that can establish wireless communication with a communication device. The log collection terminal is a communication terminal used to collect information such as wireless communication exchanges between the communication device and the first base station, operation records of the communication device, etc. as log information. The user of the log collection terminal captures the log information placed in the beacon frame broadcast by the communication device, analyzes it, and uses it to investigate the cause of the problem.

The second base station is a base station that transmits wireless frames to surrounding devices. The second base station is equipped with at least one specific SSID determined in advance for its own device. The second base station stores this specific SSID in a beacon frame and transmits it to surrounding devices. Further, the second base station may be provided with two specific SSIDs (hereinafter referred to as a debugging start SSID and a debugging SSID), and may store them in a beacon frame and transmit them under predetermined conditions. The debug start SSID is information that triggers the communication device to switch the mode from normal mode to debug mode by acquiring the SSID stored in the beacon frame during wireless communication with the communication device. On the other hand, the SSID for debugging is information that triggers the communication device to switch the mode from the debug mode to the normal mode by acquiring the SSID stored in the beacon frame during wireless communication with the communication device. The second base station is, for example, a wireless access point including a wireless circuit module.

When a communication failure occurs between a communication device and the first base station, a log collection terminal and a second base station are brought in to analyze the cause of the failure, and the communication device starts debugging from the second base station. Upon detection of the SSID, the mode of the communication device changes to debug mode, and log information is loaded into the beacon frame. The beacon frame is broadcast from the communication device, and the log collection terminal collects log information.

The communication device includes a wireless communication section, a determination section, a communication control section, a storage section, a frame generation section, and a communication mode flag. The wireless communication unit performs various processes related to wireless communication with the first base station and the log collection terminal, respectively, via a wireless interface provided in its own device (communication device). The wireless communication unit temporarily stores information regarding exchange of wireless communication performed between the own device and the first base station in the storage unit as log information. In the debug mode, the wireless communication unit broadcasts a beacon frame carrying log information at a predetermined transmission power. The storage unit stores a debug start SSID and a debug end SSID that are referred to when determining whether the communication mode changes between normal mode and debug mode.

Patent Document 4 discloses a wireless system that efficiently acquires wireless environment information and avoids a decrease in throughput. The multiple base station wireless communication system disclosed in Patent Document 4 includes M wireless base stations, a network, and a multiple base station controller. A base station is, for example, an access point (AP) in a wireless LAN (Local Area Network). Each wireless base station is equipped with a wireless environment monitoring device. The wireless environment monitoring device is a device that acquires wireless environment information at each base station. The wireless environment information includes, for example, the idle time rate (BUSY rate) and packet error rate (PER), which indicate the percentage of time during which no communication is performed during a predetermined period of time on a channel used for wireless communication. . Furthermore, in the case of a wireless LAN, the number of SSIDs (Service Set Identifiers) or the frequency of retransmission occurrence can also be used instead of the free time rate. Furthermore, FER (Frame Error Ratio) may be used instead of the packet error rate.

The base station includes at least a radio resource parameter setting section, a communication section, an abnormality notification section, and a storage section. The radio resource parameter setting unit sets the radio resource parameters determined by the multiple base station controller to its own base station. The parameters of radio resources include, for example, the frequency, band, transmission power, channel, etc. to be used. The communication unit performs wireless communication with a terminal station using the base station via an antenna. Further, the communication unit communicates with the multiple base station controller via the network. The abnormality notification unit notifies neighboring base stations of the occurrence of the abnormality via the communication unit when there is an abnormality in the communication status at the own base station. Further, the abnormality notification unit transmits wireless environment information measured about the wireless communication channel in which the abnormality has occurred in the multiple base station controller via the communication unit. The storage unit stores values of radio resource parameters of the own base station, identification information of neighboring base stations, and the like.

The wireless environment monitoring device includes at least an environmental information measuring section, a transmission quality determining section, a log recording section, and a storage section. The environment information measurement unit measures the idle time rate and packet error rate for each channel. The transmission quality determination unit determines the transmission quality of wireless communication from the idle time rate and packet error rate measured by the environmental information measurement unit. Specifically, the transmission quality determination unit determines the deterioration of the communication environment by comparing thresholds set in two stages (threshold 1 and threshold 2) with the idle time rate and the packet error rate. The log recording unit outputs information including the idle time rate and the packet error rate to a log when the transmission quality determining unit determines that the communication environment has deteriorated. The storage unit records predetermined threshold values 1, 2, and the like.

To be more specific, the environmental information measurement unit periodically monitors the communication transmission status on the channel used by its own base station for communication, and measures the idle time rate and packet error rate. The transmission quality determination section outputs the free time rate and the packet error rate obtained from the environmental information measurement section to the log recording section when the free time rate is greater than the threshold 1 BUSY and the packet error rate is greater than the threshold 1 PER. If the idle time rate is greater than threshold 2 BUSY or the packet error rate is greater than threshold 2 PER, the transmission quality determination section outputs the information output to the log recording section to the abnormality notification section of the base station. When the abnormality notification unit acquires the identification information of the channel in which the abnormality has occurred, the idle time rate and packet error rate of that channel, and the time at which they were measured from the transmission quality determination unit of the wireless environment monitoring device, the abnormality notification unit sends information to multiple base stations to the communication unit. Instructs the controller to transmit the information. The communication unit transmits information including the abnormal channel, idle time rate, packet error rate, and time to the multiple base station controllers via the network.

Japanese Patent Application Publication No. 2017-143544 Japanese Patent Application Publication No. 2010-213040 JP 2019-180012 Publication Japanese Patent Application Publication No. 2015-146507

However, Patent Documents 1 to 4 have the following problems.

In Patent Document 1, even if the above-mentioned index is known, wireless LAN failures may be caused by radio waves other than the wireless LAN that cannot be confirmed from the access point, or noise from equipment. Moreover, although Patent Document 1 describes the internal configuration and operation of a wireless terminal device, it does not disclose or suggest anything about the internal configuration and operation of an access point.

If the cause is radio waves other than the wireless LAN or equipment noise, an on-site site survey or radio wave investigation as disclosed in Patent Document 2 will be conducted. However, Patent Document 2 only discloses a site survey when an access point is installed, and does not disclose or suggest anything about a site survey when a wireless LAN failure occurs. Moreover, although Patent Document 2 describes the internal configuration and operation of the terminal (STA) and the control device (controller), it does not disclose or suggest anything about the internal configuration and operation of the access point.

Patent Document 3 discloses a communication system that can easily collect real-time log information after a failure occurs. However, although Patent Document 3 also describes the internal configuration and operation of a communication device, it does not disclose or suggest anything about the internal configuration and operation of a base station that is a wireless access point. That is, in Patent Document 3, information regarding wireless communication exchange performed between a communication device and a first base station is temporarily held in a storage unit of the communication device as log information. Upon detecting the debug start SSID from the second base station, the communication device broadcasts a beacon frame loaded with log information. The log collection terminal simply captures the log information placed on the beacon frame.

On the other hand, Patent Document 4 discloses the internal configuration and operation of a base station (access point). In the base station (access point) disclosed in Patent Document 4, information including an idle time rate and a packet error rate, which are determined to indicate that the communication environment has deteriorated, is recorded in a log recording unit as log information. The communication unit of the base station (access point) transmits log information larger than a threshold value among the log information recorded in the log recording unit to the controller connected via the communication network. Therefore, in Patent Document 4, in order to acquire log information recorded in a base station (access point), a controller connected via a communication network (network) is required.

In the field survey described above, it is desirable to obtain log information recorded in an access point without connecting to a communication network (network).

However, problems may occur, such as not being able to check the investigation log of the device (access point) at the investigation destination, or, for example, when checking the investigation results and investigation log at a later date, necessary information is missing.

As mentioned above, when it comes to wireless LAN failures, on-site site surveys and radio wave surveys are often conducted. However, the investigation destination may not be able to check the investigation log of the device (access point), or, for example, may not have necessary information when checking the investigation results and investigation log at a later date. As a result, the cause of the wireless LAN failure may not be ascertained, and it may take time to investigate the cause. Therefore, there is a need for a method for safely acquiring investigation logs from installed access points without connecting to a network.

That is, regarding access points using wireless LAN, on-site site surveys and radio wave surveys are conducted in the event of a wireless LAN failure. However, there are problems such as being unable to check the investigation log of the device (access point) at the investigation destination, or being unable to track the status of the access point in real time using the investigation log, making it impossible to identify the cause of the failure.

An object of the present invention is to provide an access point, an investigation log acquisition method, and an investigation log acquisition program that solve the above-mentioned problems.

The access point of the present invention includes: a state management unit that measures radio wave conditions including radio wave interference and channel usage rate of received signals including wireless data received by wireless scanning, and stores the measured scan data in a database; An investigation log storage database that stores only the scan data stored in the wireless console as an investigation log; and a connection request received as the received signal when investigating a wireless LAN (Local Area Network) failure only confirms the investigation log. a control unit that controls to transmit the investigation log stored in the investigation log storage database to the wireless terminal that transmitted the connection request when the SSID (Service Set Identifier) for a wireless console is capable of Equipped with.

The investigation log acquisition method of the present invention is a method of acquiring investigation logs from an access point, wherein the access point detects radio wave conditions including radio wave interference and channel usage rate of received signals including wireless data received by wireless scanning. The survey log acquisition method includes: a database for storing scan data obtained by measurement; and a survey log storage database for storing only the scan data stored in the database as the survey log for a wireless console. , if the connection request received as the received signal when investigating a wireless LAN (Local Area Network) failure is an SSID (Service Set Identifier) for a wireless console that can only confirm the investigation log , it is stored in the investigation log storage database. control is performed to transmit the investigation log that has been sent to the wireless terminal that sent the connection request.

The investigation log acquisition program of the present invention is a program that causes a computer, which is an access point, to acquire an investigation log from the access point, and the access point is configured to prevent radio wave interference of received signals including wireless data received by wireless scanning. a database that stores scan data obtained by measuring radio wave conditions including channel usage ; and a survey log storage database that stores only the scan data stored in the database as the survey log for a wireless console; The investigation log acquisition program only allows the computer to check the investigation log to see if the connection request received as the received signal is a communication SSID (Service Set Identifier) when investigating a problem in a wireless LAN (Local Area Network). an SSID determination procedure for determining whether the received connection request is the SSID for the wireless console, and accessing the investigation log storage database when the received connection request is determined to be the SSID for the wireless console by the SSID determination procedure; and a communication control procedure for controlling the wireless terminal to read the investigation log and transmit the connection request to the wireless terminal that transmitted the connection request.

According to the present invention, only the investigation log can be acquired without being directly connected to a network.

FIG. 1 is a block diagram showing the configuration of an access point according to a first embodiment of the present invention. 2 is a diagram illustrating an example of setting a communication SSID and a wireless console SSID of the access point illustrated in FIG. 1. FIG. 2 is a diagram for explaining an operation method of the access point and first and second wireless terminals shown in FIG. 1. FIG. 2 is a flowchart for explaining the operation of the access point shown in FIG. 1. FIG.

First, an overview of an embodiment of the present invention will be explained.

The access point according to the embodiment of the present invention can send out both a communication SSID that allows normal wireless communication using the wireless LAN function and a wireless console SSID that allows only checking of investigation logs. The communication SSID is also usually called an SSID. The access point can store information such as radio wave interference and channel usage rate obtained by wireless scanning of wireless modules in a dedicated database. As a result, the wireless terminal can check the investigation log at any time from the wireless console SSID where the investigation log can be checked.

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

(First embodiment)
FIG. 1 is a block diagram showing the configuration of an access point A1 according to a first embodiment of the present invention. Access point A1 includes a wireless transmitter/receiver 11, a state manager 12, and a controller 13. The wireless transmitter/receiver 11 functions as the wireless module.

The wireless transmitting/receiving unit 11 transmits and receives wireless signals (radio waves) including wireless data via a wireless LAN. To be more specific, the wireless transmitter/receiver 11 includes a receiver 101 and a transmitter 102. The receiving unit 101 receives a wireless signal including wireless data as a received signal via a wireless LAN. The transmitter 102 transmits a wireless signal including wireless data as a transmission signal via a wireless LAN.

The state management unit 12 manages the state of the access point A1. To be more specific, the state management section 12 is connected to the reception section 101 of the wireless transmission/reception section 11. The state management section 12 includes a radio wave state measurement section 103 and a database 104. Database 104 serves as the main storage medium for access point A1. That is, the database 104 stores various log data such as firmware and event log information of the device itself. The radio wave condition measuring unit 103 measures the radio wave condition of a wireless signal (received signal) including received wireless data by a wireless scan (radio wave scan). The database 104 stores the results of the radio wave scan measurement data as scan data (wireless scan log data), which is one of various types of log data. Here, "wireless scan (radio wave scan)" refers to scanning the beacons of surrounding wireless LAN access points on each channel, checking which access points are communicating with which SSID and on which channel, and how much radio waves are being transmitted. This is a function that checks whether the SSID is visible in terms of strength and how much communication time is occupied by wireless communication with that SSID (corresponding to the channel usage rate). Although "beacons" will be explained in detail later, beacons are basically transmitted periodically (for example, every 100 milliseconds) by a wireless LAN access point to notify wireless terminals of its presence. It is a wireless frame.

The access point A1 includes an investigation log storage database 108 as the dedicated database. The investigation log storage database 108 is connected to the database 104 of the state management section 12. The investigation log storage database 108 stores (archives) the scan data (wireless scan log data) stored in the database 104 as an investigation log for the wireless console. Specifically, among the various log data stored in the database 104, the access point A1 investigates only the radio scan log data, such as radio wave interference and channel occupancy rate, which can be obtained by the above-mentioned radio scan, as an investigation log. It is saved in the log storage database 108. Note that the timing of writing wireless scan log data to the investigation log storage database 108 will be described later.

The control unit 13 controls the entire operation of the access point A1. More specifically, the control unit 13 is connected to the wireless transmitting/receiving unit 11 and the investigation log storage database 108 . The control unit 13 includes an SSID determination unit 105, a first communication control unit 106, and a second communication control unit 107. In FIG. 1, the first communication control section 106 is illustrated as a "communication control section A," and the second communication control section 107 is illustrated as a "communication control section B."

The SSID determining unit 105 determines which SSID the communication (received signal) from the receiving unit 101 of the wireless transmitting/receiving unit 11 is from. The first communication control unit (communication control unit A) 106 controls communication from the wireless console SSID, as described later. The second communication control unit (communication control unit B) 107 controls communication of the normal SSID.

Access point A1 further includes a wired transmitter/receiver 109. The wired transmitting/receiving section 109 is connected to the database 104 of the state management section 12, the second communication control section (communication control section B) 107 of the control section 107, and a wired LAN (not shown). The wired transmitting/receiving unit 109 exchanges information from the second communication control unit (communication control unit B) 107 and the database 104 with a device (not shown) on the wired LAN side, and performs communication.

The configuration of the access point A1 according to the first embodiment of the present invention has been described above. However, since the parts related to the wireless LAN terminal that are not shown in FIG. 1 have no direct relation to the present invention, their detailed configuration will be omitted.

FIG. 2 is a diagram showing a setting example of the communication SSIDW1 and the wireless console SSIDW2 of the access point A1.

The SSID determining unit 105 determines whether the connection request of the reception signal received by the receiving unit 101 is for communication SSID W1 or wireless console SSID W2. If the connection request is for the communication SSIDW1, the control unit 13 operates to communicate with the second communication control unit (communication control unit B) 107. If the connection request is for the wireless console SSIDW2, the control unit 13 operates to communicate with the first communication control unit (communication control unit A) 106.

The first communication control unit (communication control unit A) 106 is configured (designed) to be able to access only the investigation log storage database 108, and is only permitted to read investigation logs. Writing of investigation logs to investigation log storage database 108 is permitted only from database 104 . To be more specific, basically, a wireless scan of the surrounding radio wave environment is also executed at a certain interval (for example, once every 10 minutes by default, variable by setting, etc.). When the access point A1 finishes writing the wireless scan log data to the database 104, the access point A1 writes the wireless scan log data as an investigation log to the investigation log storage database 108 and stores it.

FIG. 3 is a diagram for explaining the operating method of the access point A1 and the first and second wireless terminals P1 and P2. The first wireless terminal P1 is a wireless terminal that connects to a communication network (network) and performs communication. The second wireless terminal P2 is a wireless terminal whose purpose is to obtain the investigation log of the access point A1.

As described above, the access point A1 has the function of transmitting both the communication SSIDW1 and the wireless console SSIDW2. The wireless transmitter/receiver 11 includes a flash memory (not shown) for storing wireless information such as a communication SSIDW1 and a wireless console SSIDW2. The access point A1 reads the communication SSIDW1 and the wireless console SSIDW2 from the flash memory, and transmits the beacon of the communication SSIDW1 and the wireless console SSIDW2 as transmission signals from the transmitter 102 of the wireless transmitter/receiver 11. do. Here, the "beacon" is a radio frame used by a wireless LAN access point to periodically notify surrounding wireless terminals of its presence, as described above. Therefore, based on this beacon information, the wireless terminal establishes a connection with the access point. When connecting as a wireless LAN, the beacon is given information such as function information supported by the access point and SSID information for connecting to the wireless LAN access point. Beacons are transmitted over the air periodically, typically every 100 milliseconds. Therefore, the access point A1 transmits two types of beacons for different purposes, the communication SSIDW1 and the wireless console SSIDW2, almost simultaneously (continuously since they cannot be transmitted at the exact same time). In this way, the access point A1 basically always transmits a beacon, but it may be configured to transmit the beacon of the wireless console SSIDW2 only in the event of a failure.

FIG. 4 is a flowchart for explaining the operation of access point A1 shown in FIG.

First, a description will be given of the operation when the first wireless terminal P1, which aims to connect to a communication network (network) and perform communication, receives a beacon from the communication SSID W1 of the access point A1.

In this case, the first wireless terminal P1 transmits a connection request to the communication SSID W1 to the access point A1 (step 201).

Therefore, the receiving unit 101 of the access point A1 receives the connection request from the first wireless terminal P1 (step 202). Based on the connection request, the SSID determination unit 105 of the access point A1 determines whether the connection request destination of the received radio wave is the communication SSIDW1 or the wireless console SSIDW2 (step 203).

In the case of the first wireless terminal P1, a connection request is made to the communication SSID W1. Therefore, the SSID determination unit 105 distributes the communication with the first wireless terminal P1 to the second communication control unit (communication control unit B) 107, and connects the communication with the first wireless terminal P1 to the normal network (wired LAN) via the wired transmission/reception unit 109. It becomes possible to communicate with (step 204).

The access point A1 communicates for a while, and ends the wireless communication as soon as the communication is disconnected or the communication times out (step 205, YES in step 206) (step 207, step 208).

Next, a description will be given of the operation when the second wireless terminal P2, which aims to obtain the investigation log of the access point A1, receives a beacon from the wireless console SSIDW2 of the access point A1.

In this case, the second wireless terminal P2 transmits a connection request to the wireless console SSIDW2 to the access point A1 (step 201).

Therefore, the receiving unit 101 of the access point A1 receives the connection request from the second wireless terminal P2 (step 202). Based on the connection request, the SSID determination unit 105 of the access point A1 determines whether the connection request destination of the received radio wave is the communication SSIDW1 or the wireless console SSIDW2 (step 203).

The second wireless terminal P2 makes a connection request to the wireless console SSIDW2. Therefore, the SSID determination unit 105 distributes communication with the second wireless terminal P2 to the first communication control unit (communication control unit A) 106. As a result, an IP (internet protocol) address is automatically set to the second wireless terminal P2 by the first communication control unit (communication control unit A) 106 using DHCP (dynamic host configuration protocol), and an IP (internet protocol) address is automatically set from the inspection log storage database 108. The investigation log (log data) can be acquired (step 209).

The access point A1 communicates for a while, and ends the wireless communication as soon as the communication is disconnected or the communication times out (step 210, YES in step 211) (step 207, step 208).

At this time, only reading access from the first communication control unit (communication control unit A) 106 to the inspection log storage database 108 is permitted. Therefore, the first communication control unit (communication control unit A) 106 cannot write any data to the inspection log storage database 108, and can only acquire the investigation log. Further, the first communication control unit (communication control unit A) 106 cannot communicate with the wired transmitting/receiving unit 109. Therefore, it is impossible to invade the network via the wireless console SSIDW2.

Thereby, the second wireless terminal P2 can check the survey log at any time from the wireless console SSID, which can also check the survey log during a field survey or the like. As a result, it becomes possible to acquire and investigate logs without directly connecting the access point A1 to the network.

Therefore, by using the access point A1 of the present invention, which has a wireless console that cannot be directly connected to the outside and can only read the investigation log of the access point, it is possible to easily identify the cause when investigating a failure. become.

Note that each part of the control unit 13 of the access point A1 can be realized using a combination of hardware and software. The hardware includes a CPU (central processing unit) and a program memory including ROM (read only memory) and RAM (random access memory). In a form that combines hardware and software, an investigation log acquisition program is stored in a program memory, and each part is realized as various means by operating hardware such as a CPU based on the investigation log acquisition program. Further, the investigation log acquisition program may be recorded on a recording medium and distributed. The investigation log acquisition program recorded on the recording medium is read into the memory via wire, wireless, or the recording medium itself, and operates the control unit and the like. Note that examples of recording media include optical disks, magnetic disks, semiconductor memory devices, hard disks, and the like.

To describe the above embodiment in another way, the computer (CPU) operating as the control unit 13 is configured to operate the SSID determination unit 105, the first communication This can be realized by operating as a control unit (communication control unit A) 106 and a second communication control unit (communication control unit B) 107.

Next, the effects of this embodiment will be explained.

According to the investigation log acquisition method of this embodiment, log acquisition and investigation can be performed without being directly connected to a network. The reason for this is that the fault investigation is being carried out by the access point A1, which has the wireless console SSIDW2 that can read only the investigation log.

(Other embodiments)
In addition to the wireless LAN described above, the present invention may also implement a similar wireless console in a different wireless standard such as Bluetooth.

Although the present invention has been described above with reference to the embodiments, the present invention is not limited to the above embodiments. The configuration and details of the present invention can be modified in various ways that can be understood by those skilled in the art within the scope of the present invention.

The present invention can be used in all cases where access points are used indoors, such as in offices and shops.

A1 Access point 11 Wireless transmission/reception unit 101 Receiving unit 102 Transmitting unit 12 Status management unit 103 Radio wave condition measurement unit 104 Database 13 Control unit 105 SSID determination unit 106 First communication control unit (communication control unit A)
107 Second communication control unit (communication control unit B)
108 Investigation log storage database (dedicated database)
109 Wired transmitter/receiver

Claims (10)

a state management unit that measures radio wave conditions including radio wave interference and channel usage rate of received signals including wireless data received through wireless scanning, and stores the measured scan data in a database;
an investigation log storage database that stores only the scan data stored in the database as an investigation log for a wireless console;
When a connection request received as the received signal when investigating a wireless LAN (Local Area Network) failure is an SSID (Service Set Identifier) for a wireless console that can only confirm the investigation log , the connection request is stored in the investigation log storage database. a control unit configured to transmit the investigation log to the wireless terminal that transmitted the connection request;
An access point equipped with The state management section includes a radio wave condition measurement section that measures the radio wave condition of the received signal received by the wireless scan.
The access point according to claim 1. The control unit includes:
an SSID determination unit that determines whether the received connection request is a communication SSID or the wireless console SSID;
When the SSID determination unit determines that the received connection request is the SSID for the wireless console, control is performed to access the investigation log storage database, read the investigation log, and send it to the wireless terminal. a first communication control unit,
The access point according to claim 1 or 2, comprising: The access point according to claim 3, wherein the first communication control unit is configured to be able to access only the investigation log storage database. The access point according to claim 3, wherein writing of the investigation log to the investigation log storage database is permitted only from the database. The access point according to claim 3, further comprising a transmitter that transmits a beacon of the communication SSID and a beacon of the wireless console SSID. further comprising a wired transceiver connected to the database and a wired network,
The control unit includes a second controller configured to control communication with the wired network via the wired transmission/reception unit when the SSID determination unit determines that the received connection request is the communication SSID. including a communication control unit,
The access point according to claim 3. A survey log acquisition method for acquiring survey logs from an access point, the method comprising:
The access point includes a database that stores scan data obtained by measuring radio wave conditions including radio wave interference and channel usage rate of received signals including wireless data received by wireless scanning, and a database that stores scan data obtained by measuring radio wave conditions including radio wave interference and channel usage rate of received signals including wireless data received by wireless scanning, and an investigation log storage database for storing only data as the investigation log for the wireless console;
The investigation log acquisition method is as follows:
When a connection request received as the received signal when investigating a wireless LAN (Local Area Network) failure is an SSID (Service Set Identifier) for a wireless console that can only confirm the investigation log , the connection request is stored in the investigation log storage database. controlling the investigation log to be transmitted to the wireless terminal that transmitted the connection request;
How to obtain investigation logs. Determining whether the received connection request is a communication SSID or the wireless console SSID,
If it is determined that the received connection request is the SSID for the wireless console, accessing the investigation log storage database, reading the investigation log, and transmitting it to the wireless terminal;
The investigation log acquisition method according to claim 8. An investigation log acquisition program that causes a computer serving as an access point to acquire an investigation log from the access point, the program comprising:
The access point includes a database that stores scan data obtained by measuring radio wave conditions including radio wave interference and channel usage rate of received signals including wireless data received by wireless scanning, and a database that stores scan data obtained by measuring radio wave conditions including radio wave interference and channel usage rate of received signals including wireless data received by wireless scanning, and an investigation log storage database for storing only data as the investigation log for the wireless console;
The investigation log acquisition program causes the computer to:
An SSID that determines whether the connection request received as the received signal when investigating a problem in a wireless LAN (Local Area Network) is a communication SSID (Service Set Identifier) or an SSID for a wireless console that can only confirm the investigation log. Discrimination procedure and
If the received connection request is determined to be the wireless console SSID by the SSID determination procedure, access the investigation log storage database, read the investigation log, and send the connection request to the wireless terminal that sent the connection request. a communication control procedure for controlling the transmission;
An investigation log acquisition program for executing.