JP2004140614A - Load distribution system for wireless lan access point - Google Patents

Load distribution system for wireless lan access point Download PDF

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Publication number
JP2004140614A
JP2004140614A JP2002303671A JP2002303671A JP2004140614A JP 2004140614 A JP2004140614 A JP 2004140614A JP 2002303671 A JP2002303671 A JP 2002303671A JP 2002303671 A JP2002303671 A JP 2002303671A JP 2004140614 A JP2004140614 A JP 2004140614A
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access point
maximum number
access points
terminals
wireless
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JP4029330B2 (en
Inventor
Yoshio Nagasaki
長崎　義男
Kazuaki Yamanoue
山野上　和明
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Kanda Tsushin Kogyo Co Ltd
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Kanda Tsushin Kogyo Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a load distribution system which can be implemented between an unspecified wireless LAN (local area network) card-mounting PC and a wireless LAN access point. <P>SOLUTION: The load distribution is characterized in that, in the wireless LAN system, a means for broadcasting its number of connected terminals and current maximum number of connected terminals to other access points in the same group every time when one wireless terminal is connected to its access point and when a wireless terminal is released, and a means for increasing the maximum number of connected terminals if each access point in the same group has already reached the maximum number of connected terminals when connection is requested from a wireless terminal are provided. And also, it is characterized in that a means for decreasing the maximum number of connected terminals if the number of connected wireless terminals entirely becomes smaller than the maximum number of connected terminals by a predetermined number of terminals due to release of the wireless terminal, and a means for storing the number of connected terminals broadcast from other access points in the same group in correspondence with the access point and storing/updating the maximum number of connected terminals thus broadcast, are also provided. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
本発明は、複数の無線ＬＡＮアクセスポイント（以下単にアクセスポイントと称す）で構成される無線ＬＡＮシステムにおいて、複数の無線端末、すなわち無線ＬＡＮカードを搭載したクライアントパソコン（以下クライアントＰＣと称す）からアクセスポイントに無線接続する際に、アクセスポイントに接続するクライアントＰＣの台数を均等にする方法（以下負荷分散と称す）に関する。
【０００２】
【従来の技術】
従来は、複数のアクセスポイントが発するビーコン信号に、当該アクセスポイントの接続台数情報を乗せて送信し、クライアントＰＣ側が電波の強弱と該情報とを合わせて、接続するに最適なアクセスポイントを選択していた。
しかしながら、ビーコン信号に乗せる情報、クライアントＰＣ側で最適を判断するアルゴリズムは、各製造、販売会社間で異なっていた。
【０００３】
【発明が解決しようとする課題】
特定製造、販売会社の無線ＬＡＮアクセスポイントと、同一製造、販売会社による無線ＬＡＮカード搭載ＰＣとの間でしか負荷分散を実現できなくて、異なる製造、販売会社のアクセスポイント、クライアントＰＣ間では当該機能を実現できなかった。
【０００４】
本発明の目的は、簡単な構成で、不特定多数の製造、販売会社の無線ＬＡＮカード搭載ＰＣとの間で負荷分散を実現する無線ＬＡＮアクセスポイントの負荷分散方式を提供することにある。
【０００５】
【課題を解決するための手段】
この目的を達成するため、本発明の方式を以下のようにした。
有線接続された複数のアクセスポイントがグループ化され、このグループ化された複数のアクセスポイントと、一つのグループ内のアクセスポイント個々に無線接続の要求を送出すことが可能で、かつ接続許可されたアクセスポイントに無線接続が可能な複数の無線端末とで構成した無線ＬＡＮシステムにおいて、
自己のアクセスポイントに、前記無線端末の一つを無線接続する時と、一つの無線端末を開放した時毎に、自己の接続台数、現在の最大接続台数を同一グループ内の他のアクセスポイントに同報する手段と、
無線端末から接続要求があったとき、自己のアクセスポイントが最大接続台数に達し、かつ同一グループ内にある他のアクセスポイントの中で最大接続台数に達していないアクセスポイントがある場合に、自己への接続要求を拒否する手段と、
無線端末から接続要求があったとき、同一グループ内の各アクセスポイントが全て最大接続台数に達していた場合、前記接続要求のあったアクセスポイントは前記無線端末を接続し、最大接続台数を増加させ、また現在の接続台数を増加させるとともに、現在の増加した接続台数と増加させた最大接続台数を同一グループ内の他のアクセスポイントに同報する手段と、
無線端末の開放によって、同一グループ内のアクセスポイントすべての無線端末接続台数が最大接続台数より予め定めた台数以上少なくなった場合、前記各アクセスポイントは最大接続台数を減少させ、自己の減少した接続台数と現在の減少した最大接続台数を前記グループ内の他のアクセスポイントに同報する手段と、同一グループ内の他のアクセスポイントから同報された接続台数をアクセスポイント個別対応に記憶するとともに、同報された最大接続数を記憶更新する手段と、
を備えた無線ＬＡＮアクセスポイントの負荷分散方式。
【０００６】
【発明の実施の形態】
図１は、本発明の一実施例を示すアクセスポイントのフローチャート、図２は、自己及び同一ＡＰグループ内のアクセスポイントからも一定時間の間、接続するクライアントＰＣの増減が起こらない場合、自己のアクセスポイントに接続しているクライアントＰＣの台数を同一ＡＰグループのアクセスポイントに同報する動作を示すフローチャート、図３は、クライアントＰＣが同報を受けるフローチャート、図４は、同一グループ内アクセスポイントとクライアントＰＣで構成される無線ＬＡＮシステムの一部を示すブロック図、図５はアクセスポイントの構成を示すブロック図、図６は、アクセスポイントの記憶部にあるクライアントＰＣが接続している台数を記憶するクライアントＰＣ接続台数管理テーブルである。なお、図中においてアクセスポイントをＡＰと略記する場合がある。
【０００７】
１はケーブル、１００はスイッチングハブ、１０はアクセスポイント、１１は、最大接続台数を記憶する記憶部、１２は最少接続台数を記憶する記憶部、１３は自己及び他のアクセスポイントが接続しているクライアントＰＣの接続台数管理テーブルの記憶部、１４は有線送受信部、１５は各種制御を行う制御部、１６はクライアントＰＣと無線接続をする無線送受信部、１７はクライアントＰＣと無線通信するためのアンテナ、２０はアクセスポイント、３０はアクセスポイント、４１、４２、４３以下は無線端末であるクライアントＰＣを示す。
【０００８】
次に図１，図２の動作フローチャートを用いて説明を行う。
（１）負荷分散を実施する複数のアクセスポイントをグループ化し（以下ＡＰグループと称す）グループに共通のグループＩＤ（以下ＧＩＤと称す）を付与する。
ＡＰグループでは最少接続台数を例えば５台と決めておく。
【０００９】
（２）ＡＰグループの各アクセスポイントはクライアントＰＣが接続される時と、クライアントＰＣが開放される時毎に、グループＩＤ（ＧＩＤ）を含めて自己の接続台数、現在の最大接続台数を同一ＡＰグループの他のアクセスポイントへ同報する。
【００１０】
（３）図２に示すようにＡＰグループの各アクセスポイントは一定時間接続台数の変化がない場合、同一のＡＰグループ内のアクセスポイントにＧＩＤを含めて自己の接続台数、現在の最大接続台数を同報する。
【００１１】
（４）ＡＰグループの各アクセスポイントは最大接続台数に達し、かつ同一ＡＰグループの他のアクセスポイントで限界接続台数に達していないものがある場合は、自己への接続要求を拒否する。その結果、接続要求したクライアントＰＣは他のアクセスポイントへアクセスをスライドし、結果として最大接続台数に達していないアクセスポイントへ接続する。
【００１２】
（５）ＡＰグループ内の各アクセスポイントのクライアントＰＣの接続数が最大接続台数に達した場合、ＡＰグループの各アクセスポイントは最大接続台数を＋１し、現在の増加した最大接続台数を同報する。
【００１３】
（６）アクセスポイントがクライアントＰＣの要求によりクライアントＰＣを開放することによって、グループ内のアクセスポイントすべてに２台以上の最大接続台数に余裕ができた場合、最大接続台数を−１減少させ、ＧＩＤを含めて自己の接続台数、現在の最大接続台数を同一ＡＰグループの他のアクセスポイントへ同報する。
【００１４】
（７）以上のアルゴリズムを利用して、ＡＰグループ内のアクセスポイントの負荷分散を実施する。
【００１５】
（８）全てのクライアントＰＣが同一のＡＰグループ内のアクセスポイントにも無線接続可能とすることを条件としている。すなわち本発明はクライアントＰＣが一つのグループ内のアクセスポイント個々に無線接続の要求を送出すことが可能で、かつ接続許可されたアクセスポイントに無線接続が可能な環境にて実行可能である。
【００１６】
同一グループのアクセスポイント個々に接続する無線端末の台数に関して最大接続台数を変化させる負荷分散を行わない最少接続台数を５台として定めたので、現在の全てのアクセスポイントのクライアントＰＣの接続台数が４台以内であれば、最大接続台数も５台となる。しかし制御部１５では、クライアントＰＣの接続台数が３台以内になったとしても最大接続台数を５台より少なくはしない制御としてある。すなわちアクセスポイントのクライアントＰＣ接続台数が最少接続台数以内であれば、負荷分散をする必要もなく満足な通信が可能ということである。
【００１７】
図５の自己及び他のアクセスポイントが接続しているクライアントＰＣの接続台数管理テーブルの記憶部１３のクライアントＰＣ接続台数管理テーブルを図６に示している。アクセスポイント１０、２０、３０にそれぞれクライアントＰＣが７台、６台、７台接続されているとすると、そして現在の最大接続台数は７台とする。
【００１８】
そのため、クライアントＰＣが接続要求をアクセスポイント１０に行った場合（１０１）には、アクセスポイント１０は最大接続台数に達しているため他のアクセスポイントで最大接続数に達していないものがあれば接続を拒否する。そのため、クライアントＰＣはアクセスポイント２０に接続要求を送出すれば、アクセスポイント２０の現在接続台数は６台で最大接続台数に達していないので接続が可能である。アクセスポイント２０は要求のあったクライアントＰＣを接続すると、接続台数が７台になり、自己の記憶部１３にある接続台数管理テーブルを書き換える。また自己の同一グループのＧＩＤ、現在のクライアントＰＣの接続台数７台、現在のクライアントＰＣ最大接続台数７台を同一グループのアクセスポイントに同報する。図３に示すようにこの同報通知を受けた同一グループのアクセスポイント１０，３０は最大接続台数と同報元アクセスポイントの接続台数を変更して接続台数管理テーブルを更新する。
【００１９】
ここで接続台数管理テーブルではアクセスポイント１０、２０、３０のクライアントＰＣ接続台数は全て最大接続数の７台になったため、新たなクライアントＰＣからアクセスポイント１０に接続要求がくる（１０１）と、アクセスポイントは接続台数管理テーブルから、他のアクセスポイントも最大接続数に達しているため拒否できないと判断し（１０３）、記憶部１１の最大接続台数を１台増加するよう書換、８台とする（１０４）。アクセスポイント１０は制御部１５によりこのクライアントＰＣの接続制御を行い（１０５）、また記憶部１３の接続台数管理テーブルのアクセスポイント１０のクライアントＰＣ接続台数を７台から８台へと更新する（１０６）。さらに自己の同一グループのＧＩＤ、現在のクライアントＰＣの接続台数８台、現在のクライアントＰＣ最大接続台数８台を同一グループのアクセスポイントに同報する（１０７）。
【００２０】
同報を受けた同一グループのアクセスポイント２０、３０は、記憶部１１の最大接続台数を７台から８台に更新し、また記憶部１３の接続台数管理テーブルのアクセスポイント１０のクライアントＰＣ接続台数を更新する。
なお、最大接続台数を減算することは、全てのアクセスポイントのクライアントＰＣがそれぞれ最大接続台数より２台以上減少した場合に行っている。上記のとおり、本実施例では具体的に説明しているが、本発明はこれら具体的な限定を意味していない。
【００２１】
アクセスポイントは予め定めた時間、接続台数の変化がない場合でも、自己の無線端末の接続台数、現在の最大接続台数を同一グループ内のアクセスポイントに同報するようにしている。
【００２２】
【発明の効果】
以上により、従来同一販売者の無線ＬＡＮアクセスポイントと無線ＬＡＮカード搭載無線端末間でしか負荷分散を実施できなかったが、本発明を使用することにより不特定多数の販売者の無線ＬＡＮアクセスポイントと無線ＬＡＮカード搭載無線端末間で負荷分散を実施することができる。
【図面の簡単な説明】
【図１】本発明の一実施例を示すアクセスポイントのフローチャート、
【図２】自己及び同じＡＰグループ内のアクセスポイントからも一定時間の間、接続するクライアントＰＣの増減が起こらない場合、自己のアクセスポイントに接続しているクライアントＰＣの台数を同一ＡＰグループのアクセスポイントに同報する動作を示すフローチャート、
【図３】クライアントＰＣが同報を受けるフローチャート
【図４】同一グループ内アクセスポイントとクライアントＰＣで構成される無線ＬＡＮシステムの一部を示すブロック図、
【図５】アクセスポイントの構成を示すブロック図、
【図６】アクセスポイントの記憶部にあるクライアントＰＣが接続している台数を記憶するクライアントＰＣ接続台数管理テーブルである。
【符号の説明】
１　　ケーブル、
１０　アクセスポイント、
１１　最大接続台数を記憶する記憶部、
１２　最少接続台数を記憶する記憶部、
１３　自己及び他のアクセスポイントが接続しているクライアントＰＣの接続台数管理テーブルの記憶部、
１４　有線送受信部、
１５　各種制御を行う制御部、
１６　無線送受信部、
１７　クライアントＰＣと無線通信するためのアンテナ、
２０　アクセスポイント、
３０　アクセスポイント、
４１　クライアントＰＣ
４２　クライアントＰＣ
４３　クライアントＰＣ
１００スイッチングハブ[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a wireless LAN system including a plurality of wireless LAN access points (hereinafter, simply referred to as access points), which is accessed from a plurality of wireless terminals, that is, a client personal computer (hereinafter, referred to as a client PC) equipped with a wireless LAN card. The present invention relates to a method of equalizing the number of client PCs connected to an access point when wirelessly connecting to a point (hereinafter referred to as load distribution).
[0002]
[Prior art]
Conventionally, beacon signals emitted by a plurality of access points are transmitted together with information on the number of connected access points, and the client PC selects the most suitable access point to be connected based on the strength of the radio wave and the information. I was
However, the information to be put on the beacon signal and the algorithm for judging the optimum on the client PC side differ between the respective manufacturing and sales companies.
[0003]
[Problems to be solved by the invention]
Load distribution can be realized only between a wireless LAN access point of a specific manufacturing and sales company and a PC equipped with a wireless LAN card by the same manufacturing and sales company. The function could not be realized.
[0004]
SUMMARY OF THE INVENTION It is an object of the present invention to provide a wireless LAN access point load distribution method that realizes load distribution between wireless LAN cards of an unspecified number of manufacturing and sales companies with a simple configuration.
[0005]
[Means for Solving the Problems]
In order to achieve this object, the method of the present invention is as follows.
A plurality of wired access points are grouped, and a wireless connection request can be sent to the grouped access points and each of the access points in one group, and the connection is permitted. In a wireless LAN system configured with a plurality of wireless terminals capable of wireless connection to an access point,
At the time of wirelessly connecting one of the wireless terminals to its own access point, and each time one wireless terminal is opened, the number of its own connections, the current maximum number of connections to other access points in the same group Means for broadcasting,
When a wireless terminal issues a connection request, if its own access point has reached the maximum number of connected devices and there is an access point that has not reached the maximum number of connected devices among other access points in the same group, Means for rejecting the connection request of
When there is a connection request from the wireless terminal, if all of the access points in the same group have reached the maximum number of connected devices, the access point that has made the connection request connects the wireless terminal and increases the maximum number of connected devices. Means for increasing the current number of connected devices, and broadcasting the current increased number of connected devices and the increased maximum number of connected devices to other access points in the same group,
When the number of connected wireless terminals of all access points in the same group is reduced by a predetermined number or more from the maximum number of connected terminals due to the release of the wireless terminals, each of the access points decreases the maximum number of connected terminals, and the number of connected terminals decreases. Means for broadcasting the number and the currently reduced maximum number of connected devices to other access points in the group, and storing the number of connected devices broadcast from other access points in the same group for each access point individually; Means for storing and updating the broadcasted maximum number of connections;
A load balancing method for a wireless LAN access point equipped with a.
[0006]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 is a flowchart of an access point showing one embodiment of the present invention, and FIG. 2 is a flowchart of an access point when the number of connected client PCs does not increase or decrease for a certain period of time from the access point within the same AP group. FIG. 3 is a flowchart showing an operation of broadcasting the number of client PCs connected to the access point to access points of the same AP group. FIG. 3 is a flowchart of receiving broadcasts by client PCs. FIG. 5 is a block diagram showing a configuration of an access point; FIG. 6 is a block diagram showing a configuration of an access point, and FIG. 6 stores the number of connected client PCs in a storage unit of the access point. 6 is a client PC connection number management table to be executed. In the drawings, the access point may be abbreviated as AP.
[0007]
1 is a cable, 100 is a switching hub, 10 is an access point, 11 is a storage unit for storing the maximum number of connected units, 12 is a storage unit for storing the minimum number of connected units, and 13 is connected to itself and other access points. A storage unit for the management table of the number of connected client PCs, 14 is a wired transmission / reception unit, 15 is a control unit for performing various controls, 16 is a wireless transmission / reception unit for wireless connection with the client PC, and 17 is an antenna for wireless communication with the client PC. , 20 denotes an access point, 30 denotes an access point, 41, 42, and 43 denote client PCs which are wireless terminals.
[0008]
Next, the operation will be described with reference to the operation flowcharts of FIGS.
(1) A plurality of access points for performing load distribution are grouped (hereinafter, referred to as an AP group), and a common group ID (hereinafter, referred to as a GID) is assigned to the group.
In the AP group, the minimum number of connected devices is determined to be, for example, five.
[0009]
(2) Each access point of the AP group determines the number of connected units including the group ID (GID) and the current maximum number of connected units at the same time when the client PC is connected and when the client PC is released. Broadcast to other access points in the group.
[0010]
(3) As shown in FIG. 2, when the number of connected APs in the AP group does not change for a certain period of time, the number of connected APs including the GID for the APs in the same AP group and the current maximum number of connected APs are determined. Broadcast.
[0011]
(4) When each access point in the AP group reaches the maximum number of connected devices, and there is another access point in the same AP group that does not reach the limit number of connected devices, it rejects a connection request to itself. As a result, the client PC that has made the connection request slides access to another access point, and consequently connects to an access point whose number has not reached the maximum number.
[0012]
(5) When the number of client PCs connected to each access point in the AP group reaches the maximum number of connections, each access point of the AP group increments the maximum number of connections by one and broadcasts the current maximum number of connections. .
[0013]
(6) When the access point releases the client PC at the request of the client PC, if all the access points in the group have a margin for the maximum number of connected devices of two or more, the maximum number of connected devices is reduced by −1, and the GID is reduced. And the current maximum number of connected devices to the other access points in the same AP group.
[0014]
(7) Using the above algorithm, load distribution of access points in the AP group is performed.
[0015]
(8) The condition is that all client PCs can wirelessly connect to access points in the same AP group. That is, the present invention can be executed in an environment where a client PC can send a wireless connection request to each access point in one group and can wirelessly connect to an access point whose connection is permitted.
[0016]
Since the minimum number of wireless terminals that do not perform load distribution to change the maximum number of wireless terminals connected to the individual access points of the same group is determined as five, the number of client PCs connected to all access points at present is four. If the number is within the range, the maximum number of connected devices is also five. However, in the control unit 15, even if the number of connected client PCs becomes less than three, the control is such that the maximum number of connected clients is not less than five. That is, if the number of client PCs connected to the access point is within the minimum number of connected PCs, satisfactory communication is possible without the need to distribute the load.
[0017]
FIG. 6 shows the client PC connection number management table of the storage unit 13 of the connection number management table of the client PC to which the own and other access points are connected in FIG. Assuming that 7, 6, and 7 client PCs are connected to the access points 10, 20, and 30, respectively, and the current maximum number of connected PCs is 7.
[0018]
Therefore, when the client PC makes a connection request to the access point 10 (101), the access point 10 has reached the maximum number of connections, and if there is another access point that has not reached the maximum number of connections, the connection is made. Refuse. Therefore, if the client PC sends a connection request to the access point 20, the number of access points 20 currently connected is six, and the maximum number of connected connection points has not been reached, so connection is possible. When the access point 20 connects the client PC that has made the request, the number of connected PCs becomes seven and the access point 20 rewrites the connected PC management table stored in its own storage unit 13. Also, the GID of the same group, the current number of connected client PCs of 7, and the current maximum number of connected client PCs of 7 are broadcast to access points of the same group. As shown in FIG. 3, the access points 10 and 30 of the same group that have received the broadcast notification update the connection number management table by changing the maximum connection number and the connection number of the broadcast source access point.
[0019]
Here, in the connection number management table, the number of client PCs connected to the access points 10, 20, and 30 is all seven, which is the maximum number of connections. Therefore, when a connection request comes from the new client PC to the access point 10 (101), the access is started. It is determined from the connection number management table that the other access points cannot reach the maximum number of connections because the maximum number of connections has been reached (103), and the storage unit 11 is rewritten so that the maximum number of connections is increased by one, and is changed to eight (8). 104). The access point 10 controls the connection of the client PC by the control unit 15 (105), and updates the number of connected client PCs of the access point 10 from seven to eight in the connection number management table of the storage unit 13 (106). ). Furthermore, the GID of the same group, the current number of connected client PCs of eight, and the current maximum number of connected client PCs of eight are broadcast to the access points of the same group (107).
[0020]
The access points 20 and 30 of the same group that received the broadcast update the maximum number of connected units of the storage unit 11 from seven to eight, and connect the number of client PCs of the access point 10 in the connected unit management table of the storage unit 13. To update.
The subtraction of the maximum number of connected computers is performed when the number of client PCs of all access points is reduced by two or more from the maximum number of connected computers. As described above, the present embodiment specifically describes, but the present invention does not imply these specific limitations.
[0021]
The access point broadcasts the number of connected wireless terminals and the current maximum number of connected terminals to access points in the same group even if the number of connected terminals does not change for a predetermined time.
[0022]
【The invention's effect】
As described above, the load distribution can be performed only between the wireless LAN access point of the same seller and the wireless terminal equipped with the wireless LAN card in the related art. Load distribution can be performed between wireless terminals equipped with a wireless LAN card.
[Brief description of the drawings]
FIG. 1 is a flowchart of an access point according to an embodiment of the present invention;
FIG. 2 shows the case where the number of connected client PCs does not increase or decrease for a certain period of time from the own AP and an access point in the same AP group. Flowchart showing the operation of broadcasting to points,
FIG. 3 is a flowchart of receiving a broadcast by a client PC; FIG. 4 is a block diagram showing a part of a wireless LAN system including an access point in the same group and the client PC;
FIG. 5 is a block diagram showing a configuration of an access point.
FIG. 6 is a client PC connection number management table that stores the number of connected client PCs in the storage unit of the access point.
[Explanation of symbols]
1 cable,
10 access points,
11 storage unit for storing the maximum number of connected units,
12 storage unit for storing the minimum number of connected units,
13 a storage unit of a connection number management table of the client PC to which the own and other access points are connected,
14 wired transmission and reception unit,
15 control unit for performing various controls,
16 wireless transmission / reception units,
17 an antenna for wireless communication with a client PC,
20 access points,
30 access points,
41 Client PC
42 Client PC
43 Client PC
100 switching hub

Claims (3)

有線接続された複数のアクセスポイントがグループ化され、このグループ化された複数のアクセスポイントと、一つのグループ内のアクセスポイント個々に無線接続の要求を送出すことが可能で、かつ接続許可されたアクセスポイントに無線接続が可能な複数の無線端末とで構成した無線ＬＡＮシステムにおいて、
自己のアクセスポイントに、前記無線端末の一つを無線接続する時と、一つの無線端末を開放した時毎に、自己の接続台数、現在の最大接続台数を同一グループ内の他のアクセスポイントに同報する手段と、
無線端末から接続要求があったとき、自己のアクセスポイントが最大接続台数に達し、かつ同一グループ内にある他のアクセスポイントの中で最大接続台数に達していないアクセスポイントがある場合に、自己への接続要求を拒否する手段と、
無線端末から接続要求があったとき、同一グループ内の各アクセスポイントが全て最大接続台数に達していた場合、前記接続要求のあったアクセスポイントは前記無線端末を接続し、最大接続台数を増加させ、また現在の接続台数を増加させるとともに、現在の増加した接続台数と増加させた最大接続台数を同一グループ内の他のアクセスポイントに同報する手段と、
無線端末の開放によって、同一グループ内のアクセスポイントすべての無線端末接続台数が最大接続台数より予め定めた台数以上少なくなった場合、前記各アクセスポイントは最大接続台数を減少させ、自己の減少した接続台数と現在の減少した最大接続台数を前記グループ内の他のアクセスポイントに同報する手段と、同一グループ内の他のアクセスポイントから同報された接続台数をアクセスポイント個別対応に記憶するとともに、同報された最大接続数を記憶更新する手段と、
を備えたことを特徴とする無線ＬＡＮアクセスポイントの負荷分散方式。A plurality of wired access points are grouped, and a wireless connection request can be sent to the grouped access points and each of the access points in one group, and the connection is permitted. In a wireless LAN system configured with a plurality of wireless terminals capable of wireless connection to an access point,
At the time of wirelessly connecting one of the wireless terminals to its own access point, and each time one wireless terminal is opened, the number of its own connections, the current maximum number of connections to other access points in the same group Means for broadcasting,
When a wireless terminal issues a connection request, if its own access point has reached the maximum number of connected devices and there is an access point that has not reached the maximum number of connected devices among other access points in the same group, Means for rejecting the connection request of
When there is a connection request from the wireless terminal, if all of the access points in the same group have reached the maximum number of connected devices, the access point that has made the connection request connects the wireless terminal and increases the maximum number of connected devices. Means for increasing the current number of connected devices, and broadcasting the current increased number of connected devices and the increased maximum number of connected devices to other access points in the same group,
When the number of connected wireless terminals of all access points in the same group is reduced by a predetermined number or more from the maximum number of connected terminals due to the release of the wireless terminals, each of the access points decreases the maximum number of connected terminals, and the number of connected terminals decreases. Means for broadcasting the number and the currently reduced maximum number of connected devices to other access points in the group, and storing the number of connected devices broadcast from other access points in the same group for each access point individually; Means for storing and updating the broadcasted maximum number of connections;
A load distribution method for a wireless LAN access point, comprising: 同一グループのアクセスポイント個々に接続する無線端末の台数に関して最大接続台数を変化させる負荷分散を行わない最少接続台数を予め定めておき、最大接続台数が最少接続台数より少なくならないようにしたことを特徴とした請求項１の無線ＬＡＮアクセスポイントの負荷分散方式。The maximum number of wireless terminals connected to the same group of access points individually is changed. The minimum number of connected devices that does not perform load balancing is changed in advance, so that the maximum number of connected terminals is not less than the minimum number of connected terminals. 2. The load balancing method for a wireless LAN access point according to claim 1, wherein: アクセスポイントは予め定めた時間、接続台数の変化がない場合、自己の無線端末の接続台数、現在の最大接続台数を同一グループ内のアクセスポイントに同報する請求項１の無線ＬＡＮアクセスポイントの負荷分散方式。2. The load on a wireless LAN access point according to claim 1, wherein the access point broadcasts the number of connected wireless terminals and the current maximum number of connected terminals to access points in the same group when the number of connected terminals does not change for a predetermined time. Distributed method.
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