JP2006025003A - Automatic channel assignment system for access point - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an automatic channel assignment system for an access point reducing a searching time of a proximity base station, enhancing the searching accuracy, and realizing accurate automatic channel decision with a simple configuration. <P>SOLUTION: A wireless management server (1) is connected to each of a plurality of wireless LAN base stations (21 to 2N) via a wired line. The wireless management server calculates assignment of a channel wherein no interference takes place on the basis of proximity wireless LAN base station information provided from each of the wireless LAN base stations and informs each of the wireless LAN base stations about the channel assignment information. Each of a plurality of the wireless LAN base stations informs the wireless management server about connection to a wireless LAN when it is connected to the wireless LAN of a bus structure, sets a wireless channel on the basis of the channel assignment information provided from the wireless management server and starts its operation. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an assignment system that performs automatic wireless channel selection and matching to a wireless LAN base station (access point) in a wireless LAN system.

When a wireless LAN system is used for a local area network (LAN) such as a company premises or an office, the service area is divided into a plurality of zones, and a wireless LAN base station is arranged for each zone so that the entire service area can be communicated. It is said. At this time, in order to prevent wireless interference with adjacent zones, wireless LAN base stations covering adjacent zones need to use different wireless channels.
Thus, when setting different wireless channels to wireless LAN base stations that cover adjacent zones, it is possible to set manually, but it is difficult to carry out accurately, and a setting error occurs. It is easy to cause troubles. Therefore, a method for automatically assigning and setting different wireless channels to wireless LAN base stations covering adjacent zones is required.

In the prior art proposed for this purpose, the wireless LAN base station scans the available wireless channels, counts the beacon signals of neighboring wireless LAN base stations, and notifies the number of neighboring base stations. The number of neighboring base stations in the network is recorded in the network table. Based on the number of adjacent base stations, a base station with a small number of adjacent base stations is used as a starting point for determining a radio channel, and after that base station determines a radio channel, a base station to determine a radio channel next is determined. By repeating this, the wireless channel of the entire network can be determined (see Patent Document 1).
JP 2003-283506 A

  However, this prior art is a self-distributed automatic channel determination means, which scans a radio channel between beacon signal transmissions of its own base station in order to collect information of neighboring base stations, Attempting to receive a beacon. In this method, when the beacon transmission timings of the base station and the neighboring base station match, the beacon signal of the neighboring base station cannot be received. In addition, in order to search for a neighboring base station with high accuracy, it is necessary to search for a beacon of a neighboring base station for a long time, and it takes time to determine a radio channel. Moreover, it has a complicated configuration in which reserved bits of the beacon signal are used.

  An object of the present invention is to provide an access point that can shorten the search time of a neighboring base station, improve the search accuracy, and realize an accurate automatic channel determination with a simple configuration so that there is no neighboring base station that cannot be searched. To provide an automatic channel assignment system.

In order to solve this problem, an automatic channel assignment system to an access point according to the present invention includes a plurality of wireless LAN base stations,
A wireless management server connected via a wired line to each of the plurality of wireless LAN base stations,
The wireless management server
A wireless LAN base station that creates a connection wireless LAN base station information table based on a wireless LAN base station connection request notification from each wireless LAN base station connected by a wireless LAN having a bus structure among the plurality of wireless LAN base stations Registration processing means;
Means for storing the connected wireless LAN base station information table;
Means for performing proximity wireless LAN base station search processing for collecting proximity wireless LAN base station information from each wireless LAN base station;
Means for storing proximity wireless LAN base station information notified from each wireless LAN base station in a proximity wireless LAN information table;
Channel assignment processing for performing channel assignment calculation without interference from the adjacent wireless LAN base station information, storing the channel assignment information obtained by the channel assignment calculation, and notifying the wireless LAN base station of the channel assignment information Means and
Each of the plurality of wireless LAN base stations is
Means for performing wireless LAN base station registration request processing for notifying that the wireless management server is connected to the wireless management base station when connected to a wireless LAN having a bus structure;
Means for generating a beacon signal in response to the proximity wireless LAN base station search process of the wireless management server connected by the wireless LAN of the bus structure;
Means for transmitting the generated beacon signal to a wireless zone of the wireless LAN base station;
Means for searching for proximity wireless LAN base station information by receiving a beacon;
Means for setting a wireless channel based on the channel assignment information notified from the wireless management server and starting a wireless LAN base station operation;
It has a configuration characterized in that it can be configured to perform automatic channel assignment to each of the plurality of wireless LAN base stations serving as access points.

According to the present invention, it is possible to realize a function of performing automatic channel allocation with high accuracy and accuracy in a short time in automatic radio channel allocation useful for preventing radio wave interference that becomes a problem when a wireless LAN network is constructed. .
Further, according to the present invention, the plurality of wireless LAN base stations connected by a wireless LAN having a bus structure [for example, Ethernet (registered trademark) defined by IEEE 802.3] by the wireless management server that performs centralized management. Control information is given to each of the plurality of wireless LAN base stations one by one in order, and the wireless LAN base station that has no beacon transmission request performs a proximity wireless LAN base station search. And accurate automatic radio channel assignment can be performed in a short time.

The best mode of the present invention will be described in detail.
1 to 3 show an example of the configuration of this system.

  FIG. 1 shows an example of circuit arrangement in the system of the present invention. A wireless management server 1 and a plurality of wireless LAN base stations 21, 22, 23,... Interconnected via wired communication path via -7. , 3N are slave units wirelessly connected to the wireless LAN base stations 21, 22, 23,.

  As shown in FIG. 2, the radio management server 1 is a storage unit 1-1 that stores a channel plan table (Table 1) of radio channels used in the system, and a time for performing a proximity wireless LAN base station search. It has the memory | storage part 1-2 which memorize | stores transmission time information and a reception time information table (Table 2).

  In the wireless management server 1, each wireless LAN base station IP address, wired MAC (Media Access Control) address, wireless MAC address, SSID (Service Set) from each wireless LAN base station 21, 22, 23,. On the basis of the wireless LAN base station connection request notification including (ID), a connection wireless LAN base station information table as shown in Table 3 (connected wireless LAN base station information table storage unit 1-3) is stored. Further, the connection wireless LAN base station information table (Table 3) may be used as a combination with other applications.

  When the wireless management server 1 performs the proximity wireless LAN base station search process, the wireless management server 1 starts from the wireless LAN base station with the smallest MAC address based on the connection wireless LAN base station information table as shown in Table 3 above. A “beacon transmission request”, “transmission channel information”, “transmission time information”, and “transmission end request” are given via a wireless LAN having a bus structure as a transmission wireless LAN base station for each wireless LAN base station. The wireless LAN base station 2 that does not give a “request” receives a “beacon reception request”, “reception channel information”, “reception time information”, and “reception end request” via a bus-structured wireless LAN as a reception wireless LAN base station. Means for giving (transmission time information, reception time information table storage unit 1-2, control unit 1-9).

  The wireless management server 1 receives the proximity wireless LAN base station information notified from each wireless LAN base station 2, and creates a proximity wireless LAN base station information table (Table 4) based on the received proximity wireless LAN base station information. And means (controller 1-9) for storing in the storage device 1-4.

  In the wireless management server 1, based on the proximity wireless LAN base station information table (Table 4), channel assignment calculation is performed so that interference does not occur, and the calculated channel assignment information is connected to the connected wireless LAN base station information table (Table 3) and the proximity Means [(channel assignment processing unit 1-5) + (control unit 1-9) which stores in the storage unit 1-4 of the wireless LAN base station information table (Table 4) and notifies the channel assignment information to the wireless LAN base station. ) + (Wired communication unit 1-10)].

In the wireless server 1, 1-6 is connected based on a "wireless LAN base station connection request notification" from each wireless LAN base station connected by a wireless LAN having a bus structure among the plurality of wireless LAN base stations 21 to 2N. It is a wireless LAN base station registration processing unit that creates a wireless LAN base station information table (Table 3).
1-7 indicates that when there is “proximity wireless LAN base station information” including an IP address, an SSID, and a MAC address that do not exist in the connection wireless LAN base station information table (Table 3), It is a non-system wireless LAN base station information table (Table 5) storage unit described later for storing LAN base station information.
Further, reference numeral 1-8 denotes a proximity LAN base station search processing unit for collecting proximity wireless LAN base station information notified from each wireless LAN base station.
The control unit 1-9 includes, for example, a CPU, and controls each of the circuit units 1-1, 1-2, 1-3, 1-4, 1-5, 1-6, 1-7, 1-8. Then, various control operations described in detail below are executed. The wired communication unit 1-10 is used to form a wired communication path between the wireless server 1 and the wireless LAN base station. The display unit 1-11 displays necessary visible information.

  As shown in FIG. 3, when the wireless LAN base station 2 is connected to a wireless LAN having a bus structure of the system, the wireless LAN base station is registered with the wireless management server 1 connected by the wireless LAN having the bus structure. Using the request processing unit 2-6, as a wireless LAN base station registration request notification for notifying that the own wireless LAN base station is connected, an IP address, a wired MAC address, a wireless MAC address, and an SSID are wirelessly transmitted in a bus structure. It has means (wired communication part 2-7, control part 2-9) which notifies via LAN. The wireless LAN base station 2 may have a DHCP client function and obtain an IP address by DHCP.

In the wireless LAN base station 2, based on the proximity wireless LAN base station search control of the wireless management server 1, “beacon transmission request”, “transmission channel information”, and “transmission time information” are given via a wireless LAN having a bus structure. The beacon signal is transmitted on the given transmission channel (beacon signal generation unit 2-2, beacon transmission unit 2-1), and means for notifying the wireless management server 1 of the end of transmission after the transmission is completed (wired communication unit) 2-7 and control unit 2-9).
In the wireless LAN base station, “beacon reception request”, “reception channel information”, and “reception time information” are stored in the bus structure based on the processing in the proximity wireless LAN base station search processing unit 1-8 of the wireless management server 1. When given via the wireless LAN, the “beacon signal” of the neighboring wireless LAN base station is received and searched until the “reception end request” is notified (antenna unit 2-8, beacon receiving unit, neighboring wireless LAN Base station information search unit 2-4) notifies the wireless management server 1 of the proximity wireless LAN base station information including the SSID, IP address, MAC address, and field strength information of the proximity wireless LAN base station that has been received and searched, and the end of reception. Means (wired communication unit 2-7, control unit 2-9).
In the wireless LAN base station 2, an operation channel is set based on the channel assignment information notified from the wireless management server 1 (wireless channel control unit 2-5), and means for starting wireless LAN base station operation (control unit 2) -9).

FIG. 4 shows a “system operation sequence”. The system operation will be described with reference to FIG.
The wireless LAN base station 2 connected to the system communicates with the wireless management server 1 via a wireless LAN having a bus structure, and registers as a terminal in the system (S1-1).
Under the control of the wireless management server 1, a plurality of wireless LAN base stations 2 (21, 22, 23,... 2N) are sequentially selected, and the selected base station searches for a nearby wireless LAN base station. Then, the wireless management server 1 that has notified the information of the wireless LAN base station 2 adjacent to the wireless server 1 stores the information (S1-2).
The wireless management server 1 executes (assigns) a wireless channel assignment calculation based on the proximity wireless LAN base station information received from the wireless LAN base station 2 so that interference does not occur, and stores “channel assignment information” ( S1-3).
The wireless management server 1 notifies the calculated “channel assignment information” to the wireless LAN base station (S1-4).
The wireless LAN base station 2 that receives the “channel assignment information” from the wireless server 1 starts the wireless LAN base station operation on the assigned channel (S1-5).

FIG. 5 shows a “wireless LAN base station registration sequence”. The wireless LAN base station registration sequence will be described with reference to FIG.
When the wireless LAN base station 2 is connected to a bus-structured wireless LAN (S2-1), the wireless LAN base station 2 obtains its own IP address, own wired MAC address, own wireless MAC address, and own SSID (Service Set ID). As a “wireless LAN base station connection request notification”, the wireless management server 1 is notified via the bus structure wireless LAN (S2-2).
Upon receiving the “wireless LAN base station connection request notification” from the wireless LAN base station 2, the wireless management server 1 receives the IP address and wire of the wireless LAN base station 2 included in the received “wireless LAN base station connection request notification”. The MAC address, wireless MAC address, and SSID are stored in the connection wireless LAN base station information table (Table 3) (S2-3), and after the storage is completed, a “registration end response” is notified to the wireless LAN base station (S2-4). . When the wireless LAN base station 2 receives the “registration end response” notified from the wireless management server 1, the “wireless LAN base station registration” ends (S2-5), and the “registration end response” cannot be received. When a predetermined time has elapsed, a “wireless LAN base station connection request notification” is again notified to the wireless management server 1 (S2-6).

FIG. 6A and FIG. 6B show a sequence for collecting information on proximity wireless LAN base stations. The proximity wireless LAN base station information collection sequence will be described with reference to FIGS. 6 (a) and 6 (b).
The wireless management server 1 selects the connected wireless LAN base station with the youngest MAC address from the connected wireless LAN base station information table (Table 3) as a “transmitting wireless LAN base station” (S3-1). The lowest radio channel number stored in the management server 1 is selected and set as a “search channel” (S3-2).
The wireless management server 1 gives “beacon reception request”, “reception channel information”, and “reception time information” to all wireless LAN base stations other than the transmission wireless LAN base station, that is, the reception wireless LAN base station (S3-3). . The reception wireless LAN base station 2 that has received the “beacon reception request”, “reception channel information” and “reception time information” from the wireless management server 1 is a wireless channel based on the “reception channel information”. Starts receiving a beacon signal from (S3-4), and notifies the wireless management server 1 of a reception start response that has started reception (S3-5).
When receiving the reception start response from all the reception wireless LAN base stations (S3-6), the wireless management server 1 sends a “beacon transmission request”, “transmission channel information”, and “ "Transmission time information" is given (S3-8). The transmission wireless LAN base station that has received the “beacon transmission request”, “transmission channel information”, and “transmission time information” from the wireless management server 1 starts transmitting a beacon signal on the channel specified by “transmission channel information”. (S3-9), a "transmission start response" is notified to the wireless management server 1 (S3-10).

The wireless management server 1 that has received the “transmission start response” from the transmission wireless LAN base station 2 activates the search timer and when the time is over (S3-11), notifies the transmission wireless LAN base station 2 of a “transmission end request”. The transmission wireless LAN base station that has received the “transmission end request” from the wireless management server 1 ends the transmission of the beacon signal (S3-13), and sends a “transmission end notification” to the wireless management server 1. Perform (S3-14).
The wireless management server 1 that has received the “transmission end notification” from the transmission wireless LAN base station 2 notifies the reception wireless LAN base station 2 of a “reception completion request” (S3-17). The receiving wireless LAN base station 2 that has received the “reception end request” from the wireless management server 1 ends the reception of the beacon signal (S3-18), and the SSID, IP address, MAC of the neighboring wireless LAN base station that has been received and searched. “Nearby wireless LAN base station information” including address and field strength information and “end of reception” are notified to the wireless management server 1 (S3-19).

  When the wireless management server 1 has finished receiving the proximity wireless LAN base station information notified from all the reception wireless LAN base stations 2 (S3-20), the proximity wireless LAN base station information table (Table 4) The received “proximity wireless LAN base station information” is stored in (S3-23). Even if the reception timer times out (S3-21), the “nearby wireless LAN base station information” is not notified. The receiving wireless LAN base station 2 records it as an abnormal wireless LAN base station in the connected wireless LAN base station information table (Table 3). (S3-22). When there is “proximity wireless LAN base station information” including an IP address, SSID, and MAC address that do not exist in the connected wireless LAN base station information table (Table 3), an error is displayed and the proximity wireless LAN base station The information is stored in the non-system wireless LAN base station information table (Table 5) in the non-system wireless LAN base station information table storage unit 1-7 (S3-24).

  The radio management server 1 determines whether the “search channel” is the final channel of the radio channel (S3-25). If it is not the final channel, the “search channel” is incremented by 1 according to the radio channel ( S3-36) Repeat from the operation of giving "beacon reception request", "reception channel information", and "reception time information" to the reception wireless LAN base station 2 (S3-3). When the “search channel” is the final channel of the wireless channel (S3-25), the transmitting wireless LAN base station 2 is the wireless LAN base station having the final MAC address in the connected wireless LAN base station information table (Table 3). If it is not the wireless LAN base station with the final MAC address (S3-27), the wireless LAN base station with the youngest MAC address after the current transmission wireless LAN base station 2 is transmitted to the wireless LAN base station. As the base station 2 (S3-38), the above-described operation of giving the "beacon reception request", "reception channel information", and "reception time information" to the reception wireless LAN base station 2 is repeated (S3-3). If the current transmission wireless LAN base station 2 is the wireless LAN base station with the final MAC address, the proximity wireless LAN base station information collection sequence is terminated (S3-29).

FIG. 7A and FIG. 7B show a sequence of channel assignment calculation when there are four radio channels that can be used. A sequence of channel assignment calculation when there are four radio channels that can be used will be described with reference to FIGS. 7 (a) and 7 (b).
In the wireless management server 1, a wireless LAN base station in which four or more neighboring wireless LAN base stations exist in the nearby wireless LAN base station information table (Table 4) is set as a channel assignment impossibility, and a wireless LAN base station information table (table 3) and recorded in the proximity wireless LAN base station information table (Table 4), and an alarm is displayed (S4-1). However, close proximity wireless LAN base stations with extremely low electric field strength and close proximity wireless LAN base stations that can rarely receive beacon signals can be considered not to be considered as interference base stations.

  When there is a wireless LAN base station in which there are three neighboring wireless LAN base stations that are not channel-assigned in addition to the own wireless LAN base station among the wireless LAN base stations 2 that are not channel-assigned (S4-2) The wireless LAN base station with the youngest MAC address is selected from the wireless LAN base stations that meet the above conditions (S4-3), and the selected wireless LAN base station is assigned one in the channel plan table. The lowest channel is assigned, and the neighboring wireless LAN base stations are assigned from the top channel in the channel plan table (Table 1) in descending order of electric field strength (S4-4). Further, when there is a wireless LAN base station in which there are three neighboring wireless LAN base stations that are not assigned to channels other than the own wireless LAN base station among the wireless LAN base stations that are not assigned to the channel, the above operation is repeated. .

  When there are wireless LAN base stations in which there are two neighboring wireless LAN base stations that are not channel-assigned other than the own wireless LAN base station among the wireless LAN base stations that are not channel-assigned (S4-5), Among the wireless LAN base stations 2 that meet the above conditions, select the wireless LAN base station 2 with the youngest MAC address (S4-6), and other than the channel of the neighboring wireless LAN base station that has already been channel-assigned, The channels existing in the channel plan table as shown in Table 1 are randomly assigned to the selected wireless LAN base station 2 and the non-channel assigned neighboring wireless LAN base station 2 adjacent to the selected wireless LAN base station 2. Is assigned (S4-7). Furthermore, among the wireless LAN base stations 2 that are not channel-assigned, when there is a wireless LAN base station 2 that has two neighboring wireless LAN base stations 2 that are not channel-assigned other than the own wireless LAN base station, Repeat the above operation.

  When there is a wireless LAN base station in which there is one nearby wireless LAN base station that is not channel-assigned other than its own wireless LAN base station among wireless LAN base stations that are not channel-assigned (S4-8), Among the wireless LAN base stations that meet the above conditions, the wireless base station with the youngest MAC address is selected (S4-9), and the channel plan / The channels existing in the table are randomly assigned to the selected wireless LAN base station and the non-channel assigned neighboring wireless LAN base station close to the selected wireless LAN base station (S4-10). Further, when there is a wireless LAN base station in which there are two neighboring wireless LAN base stations that are not assigned to channels other than the own wireless LAN base station among wireless LAN base stations that are not assigned to a channel, the above operation is performed. repeat.

For the remaining wireless LAN base stations, channels existing in the channel plan table other than the channels of the neighboring wireless LAN base stations to which channel assignment is performed are randomly assigned to the own wireless LAN base station (S4-11).
The calculated channel assignment information is stored in the connection wireless LAN base station information table (Table 3) and the proximity wireless LAN base station information table (Table 4) (S4-12).
If the presence of an off-system wireless LAN base station becomes clear at the time of the proximity base station information search, the channel plan is automatically avoided while avoiding the wireless channel (see Table 5) used by the off-system wireless LAN base station. May be reassembled, for example, as channel “1, 5, 9, 13” or channel “2, 6, 10, 14”.

FIG. 8 shows an assignment channel notification sequence for notifying the wireless LAN base station of the calculated channel assignment information. An assign channel notification sequence for notifying the wireless LAN base station of the channel assignment information calculated using FIG. 8 will be described.
In the wireless management server 1, the wireless LAN base station with the lowest MAC address in the connected wireless LAN base station information table (Table 3) is selected (S5-1), and the connected wireless LAN is selected as the selected wireless LAN base station. The channel assignment information based on the base station information table is notified (S5-2).
The wireless LAN base station that has received the channel assignment information sets a wireless channel based on the notified channel assignment information (S5-3), starts a wireless LAN base station operation (S5-4), and the wireless management server Is notified that the operation has started (S5-5).
The wireless management server 1 waits for an “operation start notification” from the wireless LAN base station for a certain period of time (S5-6). When receiving the “operation start notification”, the wireless management server 1 stores the operation status in the connected wireless LAN base station information table (Table 3). Is stored (S5-7).
Next, it is tested whether the selected wireless LAN base station is the wireless LAN base station with the last MAC address existing in the connected wireless LAN base station information table (Table 3) (S5-8). If the selected wireless LAN base station is not the wireless LAN base station of the last MAC address existing in the connected wireless LAN base station information table (Table 3), the wireless LAN base station is next to the selected wireless LAN base station. The wireless LAN base station with the MAC address is selected (S5-9), and the above operation is repeated from step S5-2. In the test of step S5-8, if it is found that the selected wireless LAN base station is the wireless LAN base station with the last AC address existing in the connected wireless LAN base station information table, the sequence Exit.

  The present invention can be effectively applied to radio channel assignment of a wireless LAN base station in a wireless LAN system.

It is a block diagram which shows the example of arrangement | positioning with the wireless server and wireless LAN base station which are used for this invention. It is a block diagram which shows the structural example of the radio | wireless server used for this invention. It is a block diagram which shows the structural example of the wireless LAN base station used for this invention. It is a flowchart for demonstrating the example of a system operation | movement sequence in this invention system. It is a flowchart for demonstrating the example of a wireless LAN base station registration sequence in this invention system. FIG. 7B is a flowchart for explaining a sequence example of collecting information on the proximity wireless LAN base station in the system of the present invention, which is combined with FIG. FIG. 7 is a flowchart for explaining a sequence example of proximity wireless LAN base station information collection in the system of the present invention combined with FIG. FIG. 8 is a flow chart for explaining a sequence example of channel assignment calculation in the system of the present invention combined with FIG. FIG. 8 is a flow chart for explaining a sequence example of channel assignment calculation in the system of the present invention combined with FIG. It is a flowchart for demonstrating the example of a notification sequence to the assignment channel which notifies the channel assignment information calculated in this invention system to a wireless LAN base station.

Explanation of symbols

1 wireless server 1-1 wireless channel plan table storage unit 1-2 transmission time information / reception time information table storage unit 1-3 connected wireless LAN base station information table storage unit 1-4 proximity wireless LAN base station information table storage unit 1 -5 Channel assignment processing unit 1-6 Wireless LAN base station registration processing unit 1-7 Non-system wireless LAN base station information table storage unit 1-8 Proximity wireless LAN base station search processing unit 1-9 Control unit 1-10 Wired communication Unit 1-11 Display unit 2, 21, 22, 23, ... 2N Wireless LAN base station 2-1 Beacon transmission unit 2-2 Beacon signal generation unit 2-3 Beacon reception unit 2-4 Proximity wireless LAN base station information Search unit 2-5 Wireless channel control unit 2-6 Wireless LAN base station registration request processing unit 2-7 Wired communication unit 31, ... 3N

Claims (4)

A plurality of wireless LAN base stations;
A wireless management server connected via a wired line to each of the plurality of wireless LAN base stations,
The wireless management server
A wireless LAN base station that creates a connection wireless LAN base station information table based on a wireless LAN base station connection request notification from each wireless LAN base station connected by a wireless LAN having a bus structure among the plurality of wireless LAN base stations Registration processing means;
Means for storing the connected wireless LAN base station information table;
Means for performing proximity wireless LAN base station search processing for collecting proximity wireless LAN base station information from each wireless LAN base station;
Means for storing proximity wireless LAN base station information notified from each wireless LAN base station in a proximity wireless LAN information table;
Channel assignment processing for performing channel assignment calculation without interference from the adjacent wireless LAN base station information, storing the channel assignment information obtained by the channel assignment calculation, and notifying the wireless LAN base station of the channel assignment information Means and
Each of the plurality of wireless LAN base stations is
Means for performing wireless LAN base station registration request processing for notifying that the wireless management server is connected to the wireless management base station when connected to a wireless LAN having a bus structure;
Means for generating a beacon signal in response to the proximity wireless LAN base station search process of the wireless management server connected by the wireless LAN of the bus structure;
Means for transmitting the generated beacon signal to a wireless zone of the wireless LAN base station;
Means for performing a proximity wireless LAN base station information search by receiving the beacon signal from the wired line;
Means for setting a wireless channel based on the channel assignment information notified from the wireless management server and starting a wireless LAN base station operation;
An automatic channel assignment system for access points, characterized in that automatic channel assignment to each of the plurality of wireless LAN base stations serving as access points can be performed. In the wireless management server, when the proximity wireless LAN base station search process is performed, the wireless management server, based on the connected wireless LAN base station information table, in order from the wireless LAN base station with the smallest MAC address, one wireless LAN base station at a time. A wireless LAN that gives a “beacon transmission request”, “transmission channel information”, “transmission time information”, and “transmission end request” via a bus-structured wireless LAN as a transmission wireless LAN base station, and does not give the “beacon transmission request” The base station is provided with means for giving “beacon reception request”, “reception channel information”, “reception time information” and “reception end request” as a reception wireless LAN base station via a wireless LAN having a bus structure. An automatic channel assignment system for an access point according to claim 1. In the wireless LAN base station, when “beacon transmission request”, “transmission channel information”, and “transmission time information” are given via the wireless LAN of the bus structure based on the proximity wireless LAN base station search control of the wireless management server 2. An automatic channel to an access point according to claim 1, further comprising means for generating and transmitting a beacon signal in a given transmission channel and notifying the radio management server of the end of transmission after the transmission is completed.・ Assign system. In the wireless LAN base station, “beacon reception request”, “reception channel information” and “reception time information” are transmitted via the wireless LAN of the bus structure based on the processing in the proximity wireless LAN base station search processing unit of the wireless management server. When given, until the “reception end request” is notified, the “beacon signal” of the nearby wireless LAN base station is received and searched, and the SSID, IP address, and MAC address of the received nearby wireless LAN base station 2. The automatic channel assignment system for an access point according to claim 1, further comprising means for notifying the wireless management server of the proximity wireless LAN base station information including field strength information and the end of reception.

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