JP2002261773A - Wireless LAN system - Google Patents
Wireless LAN systemInfo
- Publication number
- JP2002261773A JP2002261773A JP2001054402A JP2001054402A JP2002261773A JP 2002261773 A JP2002261773 A JP 2002261773A JP 2001054402 A JP2001054402 A JP 2001054402A JP 2001054402 A JP2001054402 A JP 2001054402A JP 2002261773 A JP2002261773 A JP 2002261773A
- Authority
- JP
- Japan
- Prior art keywords
- wireless
- access point
- wireless terminal
- lan system
- signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Mobile Radio Communication Systems (AREA)
- Burglar Alarm Systems (AREA)
- Small-Scale Networks (AREA)
Abstract
(57)【要約】
【課題】 実効性の高い盗難防止機能を有する無線ＬＡ
Ｎシステムを得る。
【解決手段】 無線ＬＡＮシステムは、無線通信アダプ
タ２０１、２０２、２０３を接続したコンピュータ（無
線端末）１０１、１０２、１０３間のデータ通信を、ア
クセスポイント３０１を介して行う。アクセスポイント
３０１は、ある一定間隔で常時、信号を発生する。無線
端末１０１、１０２、１０３には、アクセスポイント３
０１からの信号の強度を測定する機能を持たせる。この
強度を測定する機能において、予め設定した強度と常時
比較し、そのレベルを下回った時にその無線端末のＭＡ
Ｃアドレスを含む特定のパケットを送出する。送出され
たパケットを受信したアクセスポイントは、ＭＡＣアド
レスを記憶媒体に格納し、そのＭＡＣアドレスを液晶等
に表示するか、プリンタ等にて印字し、盗難されたこと
を知らせる。
[PROBLEMS] To provide a wireless LA having a highly effective anti-theft function
Obtain N systems. A wireless LAN system performs data communication between computers (wireless terminals) 101, 102, and 103 connected to wireless communication adapters 201, 202, and 203 via an access point 301. The access point 301 always generates a signal at certain fixed intervals. The wireless terminal 101, 102, 103 has an access point 3
A function of measuring the intensity of the signal from the signal generator 01 is provided. In the function of measuring the intensity, the intensity is constantly compared with a preset intensity, and when the intensity falls below the level, the MA of the wireless terminal is reduced.
Transmit a specific packet containing the C address. The access point that has received the transmitted packet stores the MAC address in a storage medium and displays the MAC address on a liquid crystal or the like, or prints the MAC address with a printer or the like to notify that the device has been stolen.
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、無線ＬＡＮシステ
ムに関し、特に、端末装置がＬＡＮと無線にて接続構成
された無線ＬＡＮシステムに関する。[0001] 1. Field of the Invention [0002] The present invention relates to a wireless LAN system, and more particularly to a wireless LAN system in which a terminal device is wirelessly connected to a LAN.
【０００２】[0002]
【従来の技術】従来、無線ＬＡＮシステムは、例えば、
無線端末装置を含み構成される。ノートパソコン等の携
帯用端末は、その機動性を充分に生かすために無線でＬ
ＡＮを構築するケースが増えている。2. Description of the Related Art Conventionally, a wireless LAN system has, for example,
It is configured to include a wireless terminal device. Portable terminals, such as notebook computers, are wirelessly connected to each other in order to make full use of their mobility.
The number of cases of building an AN is increasing.
【０００３】本発明と技術分野の類似する先願発明例と
して、特開平９−２７０８７号公報に開示されている
「盗難防止装置」がある。本先願発明例では、パソコン
機器設置場所に幹線と接続されたパソコン盗難防止装置
を併設し、各機器との間に信号線をつないで閉回路を形
成している。本構成の「盗難防止装置」により、パソコ
ン機器が盗難される場合、必ず信号線が外されるか切断
されるので、断線検出回路でそれを感知し、サイレン音
を発生して盗難防止を図っている。[0003] As an example of a prior invention similar to the present invention in the technical field, there is an "theft prevention device" disclosed in Japanese Patent Application Laid-Open No. 9-27087. In the invention of the earlier application, a personal computer anti-theft device connected to a main line is provided at a location where personal computer equipment is installed, and a signal line is connected to each equipment to form a closed circuit. When a PC device is stolen by the anti-theft device of this configuration, the signal line is always disconnected or cut off.The disconnection detection circuit detects this and generates a siren sound to prevent theft. ing.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、より盗
難されやすいのは携帯端末装置であると考えられる。よ
って、携帯用端末装置のより有効な盗難防止機能を備
え、無線ＬＡＮによって盗難防止を図ることが求められ
ている。However, it is considered that the portable terminal device is more likely to be stolen. Therefore, it is required to provide a more effective anti-theft function of the portable terminal device and to prevent theft by a wireless LAN.
【０００５】本発明は、実効性の高い盗難防止機能を有
する無線ＬＡＮシステムを提供することを目的とする。
より詳細には、下記となる。An object of the present invention is to provide a wireless LAN system having a highly effective anti-theft function.
More specifically, it is as follows.
【０００６】請求項１記載の発明では、無線端末と無線
で接続されたアクセスポイントとの接続状態の監視をお
こなう。According to the first aspect of the present invention, a connection state between a wireless terminal and an access point wirelessly connected is monitored.
【０００７】請求項２記載の発明では、無線信号の強度
の変化から無線端末との接続状態を判別して、無線端末
が盗難されそうになった時に、その無線端末のＭＡＣア
ドレスを送出し、盗難されたことを伝える。According to the second aspect of the present invention, the connection state with the wireless terminal is determined from the change in the strength of the wireless signal, and when the wireless terminal is about to be stolen, the MAC address of the wireless terminal is transmitted. Tell them they were stolen.
【０００８】請求項３記載の発明では、無線端末からの
ＭＡＣアドレスを受信したアクセスポイントは、ＭＡＣ
アドレスを記憶媒体に格納し、そのＭＡＣアドレスを液
晶等の表示手段に表示するか、プリンタ等の印字手段に
印字し、盗難されたことを知らせる。According to the third aspect of the present invention, the access point that has received the MAC address from the wireless terminal transmits the MAC address.
The address is stored in a storage medium, and the MAC address is displayed on a display device such as a liquid crystal or printed on a printing device such as a printer to notify that the device has been stolen.
【０００９】請求項４記載の発明では、無線端末からの
のＭＡＣアドレスを受信したアクセスポイントは、全て
の無線端末にそのＭＡＣアドレスを送出し、全ての無線
端末の画面に表示させて、そのＭＡＣアドレスの無線端
末が盗難されたことを知らせる。According to the fourth aspect of the present invention, the access point that has received the MAC address from the wireless terminal sends the MAC address to all the wireless terminals, and displays the MAC address on the screen of all the wireless terminals to display the MAC address. Notifies that the wireless terminal at the address has been stolen.
【００１０】[0010]
【課題を解決するための手段】かかる目的を達成するた
め、本発明の無線ＬＡＮシステムは、無線端末を構成す
るコンピュータおよび該コンピュータと接続された無線
通信アダプタと、無線通信アダプタと無線で接続された
アクセスポイントとを有し、アクセスポイントが所定の
一定間隔で信号を常時発し、無線端末との接続状態の監
視をおこなう監視手段を有することを特徴としている。In order to achieve the above object, a wireless LAN system according to the present invention comprises a computer constituting a wireless terminal, a wireless communication adapter connected to the computer, and a wireless communication adapter connected to the wireless communication adapter. And a monitoring means for constantly monitoring a connection state with the wireless terminal by the access point constantly emitting a signal at a predetermined constant interval.
【００１１】請求項２記載の発明では、請求項１記載の
無線ＬＡＮシステムにおいて、アクセスポイントが所定
の一定間隔で信号を常時発し、信号を所定の無線端末が
常時モニターして該信号の強度がある一定レベルを下回
った時にそれを感知し、アクセスポイントに対して自分
のＭＡＣアドレスを含む特定のパケットを送出すること
を特徴とする。According to the second aspect of the present invention, in the wireless LAN system according to the first aspect, the access point constantly emits a signal at a predetermined constant interval, and a predetermined wireless terminal constantly monitors the signal and the intensity of the signal is reduced. It is characterized in that when it falls below a certain level, it is detected and a specific packet including its own MAC address is transmitted to the access point.
【００１２】請求項３記載の発明では、請求項２記載の
無線ＬＡＮシステムにおいて、アクセスポイントが無線
端末からの特定のパケットを受信すると、無線端末のＭ
ＡＣアドレスを記憶媒体に格納し、ＭＡＣアドレスを表
示手段もしくは印字手段によって表示または印字するこ
とを特徴とする。According to a third aspect of the present invention, in the wireless LAN system according to the second aspect, when the access point receives a specific packet from the wireless terminal, the access point receives the specified packet from the wireless terminal.
The AC address is stored in a storage medium, and the MAC address is displayed or printed by a display unit or a printing unit.
【００１３】請求項４記載の発明では、請求項２記載の
無線ＬＡＮシステムにおいて、アクセスポイントが無線
端末からの特定のパケットを受信すると、無線端末のＭ
ＡＣアドレスをすべての無線端末に送出し、該すべての
無線端末の画面に表示させることを特徴とする。According to a fourth aspect of the present invention, in the wireless LAN system according to the second aspect, when the access point receives a specific packet from the wireless terminal, the M of the wireless terminal is changed.
An AC address is transmitted to all wireless terminals and displayed on the screens of all the wireless terminals.
【００１４】[0014]
【発明の実施の形態】次に、添付図面を参照して本発明
による無線ＬＡＮシステムの実施の形態を詳細に説明す
る。図１を参照すると、本発明の無線ＬＡＮシステムの
一実施形態が示されている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a wireless LAN system according to the present invention will be described in detail with reference to the accompanying drawings. Referring to FIG. 1, an embodiment of the wireless LAN system of the present invention is shown.
【００１５】図１において、本発明の実施形態に適用さ
れる無線ＬＡＮシステムは、コンピュータ（無線端末）
１０１、１０２、１０３と、無線通信アダプタ２０１、
２０２、２０３と、アクセスポイント３０１とを有して
構成される。コンピュータ（無線端末）１０１、１０
２、１０３は、それぞれが無線通信アダプタ２０１、２
０２、２０３と接続され、無線通信アダプタ２０１、２
０２、２０３とアクセスポイント３０１とは無線にて接
続される。In FIG. 1, a wireless LAN system applied to an embodiment of the present invention includes a computer (wireless terminal).
101, 102, 103 and the wireless communication adapter 201,
202 and 203 and an access point 301. Computers (wireless terminals) 101, 10
2 and 103 are wireless communication adapters 201 and 2 respectively.
02, 203, and wireless communication adapters 201, 2
02 and 203 and the access point 301 are wirelessly connected.
【００１６】図１は、無線通信アダプタ２０１、２０
２、２０３を接続したコンピュータ（無線端末）１０
１、１０２、１０３間のデータ通信を、アクセスポイン
ト３０１を介して行う無線ＬＡＮシステムの構成例を示
す図である。更に他のネットワークと接続する場合は、
アクセスポイントに有線ＬＡＮを接続し、もう一端を他
のネットワークに接続してもよい。FIG. 1 shows the wireless communication adapters 201 and 20.
Computer (wireless terminal) 10 to which 2, 203 is connected
FIG. 1 is a diagram illustrating a configuration example of a wireless LAN system that performs data communication between 1, 102, and 103 via an access point 301. When connecting to another network,
A wired LAN may be connected to the access point, and the other end may be connected to another network.
【００１７】図１のアクセスポイント３０１は、ある一
定間隔で常時、信号を発生する。無線端末１０１、１０
２、１０３には、アクセスポイントからの信号の強度を
測定する機能を持たせる。この強度を測定する機能にお
いて、予め設定した強度と常時比較し、そのレベルを下
回った時にその無線端末のＭＡＣアドレスを含む特定の
パケットを送出する。The access point 301 shown in FIG. 1 always generates a signal at certain fixed intervals. Wireless terminals 101, 10
2 and 103 have a function of measuring the strength of a signal from the access point. In the function of measuring the strength, the strength is constantly compared with a preset strength, and when the strength falls below the level, a specific packet including the MAC address of the wireless terminal is transmitted.
【００１８】送出されたパケットを受信したアクセスポ
イント３０１は、上記無線端末が盗難されたことを知ら
せる。この盗難されたことを知らせる手順例は、下記の
通りである。The access point 301 that has received the transmitted packet notifies that the wireless terminal has been stolen. The following is an example of a procedure for notifying that the device has been stolen.
【００１９】まず、ＭＡＣアドレスを記憶媒体に格納
し、そのＭＡＣアドレスを液晶等の表示手段に表示する
か、プリンタ等の印字手段により印字する。First, the MAC address is stored in a storage medium, and the MAC address is displayed on a display device such as a liquid crystal or printed by a printing device such as a printer.
【００２０】次に、すべての無線端末１０１、１０２、
１０３にそのＭＡＣアドレスを送出し、すべての無線端
末１０１、１０２、１０３の画面に表示させて、そのＭ
ＡＣアドレスの無線端末が盗難されたことを視認可能な
状態とする。Next, all wireless terminals 101, 102,
The MAC address is sent to the wireless terminal 103 and displayed on the screens of all the wireless terminals 101, 102, and 103.
It is possible to visually confirm that the wireless terminal having the AC address has been stolen.
【００２１】[0021]
【発明の効果】以上の説明により明らかなように、請求
項１記載の発明の無線ＬＡＮシステムは、無線端末の無
線通信アダプタと無線で接続されたアクセスポイントが
所定の一定間隔で信号を常時発し、無線端末との接続状
態の監視をしている。よって、ノートパソコン等の携帯
用端末では、その機動性を充分に生かすために無線でＬ
ＡＮを構築するケースが増えているが、携帯用端末は盗
難にあいやすい中で、無線ＬＡＮによっての盗難防止を
図ることが可能となる。As is apparent from the above description, in the wireless LAN system according to the first aspect of the present invention, an access point wirelessly connected to a wireless communication adapter of a wireless terminal always emits a signal at a predetermined constant interval. Monitoring the connection status with the wireless terminal. Therefore, in portable terminals such as notebook personal computers, in order to make full use of their mobility, wireless L
Although the number of cases of constructing an AN is increasing, portable terminals can easily be stolen, and it is possible to prevent theft by wireless LAN.
【００２２】請求項２記載の発明によれば、無線端末が
盗難されそうになった時に、その無線端末のＭＡＣアド
レスを送出し、盗難されたことを伝えることができる。According to the second aspect of the present invention, when the wireless terminal is about to be stolen, the MAC address of the wireless terminal can be transmitted to notify that the wireless terminal has been stolen.
【００２３】請求項３記載の発明によれば、無線端末か
らのＭＡＣアドレスを受信したアクセスポイントは、Ｍ
ＡＣアドレスを記憶媒体に格納し、そのＭＡＣアドレス
を液晶等の表示手段に表示するか、プリンタ等の印字手
段に印字することで、盗難されたことを知らせることが
できる。According to the third aspect of the present invention, the access point that has received the MAC address from the wireless terminal,
By storing the AC address in a storage medium and displaying the MAC address on a display device such as a liquid crystal or printing it on a printing device such as a printer, it is possible to notify that the device has been stolen.
【００２４】請求項４記載の発明によれば、無線端末か
らののＭＡＣアドレスを受信したアクセスポイントは、
すべての無線端末にそのＭＡＣアドレスを送出し、すべ
ての無線端末の画面に表示させることで、そのＭＡＣア
ドレスの無線端末が盗難されたことを知らせることがで
きる。According to the fourth aspect of the present invention, the access point that has received the MAC address from the wireless terminal,
By transmitting the MAC address to all wireless terminals and displaying the MAC address on the screen of all wireless terminals, it is possible to notify that the wireless terminal having the MAC address has been stolen.
【図１】本発明の無線ＬＡＮシステムの実施形態を示す
概念図である。FIG. 1 is a conceptual diagram showing an embodiment of a wireless LAN system of the present invention.
１０１、１０２、１０３ コンピュータ（無線端末） ２０１、２０２、２０３ 無線通信アダプタ ３０１ アクセスポイント 101, 102, 103 Computer (wireless terminal) 201, 202, 203 Wireless communication adapter 301 Access point
Claims (4)
該コンピュータと接続された無線通信アダプタと、 前記無線通信アダプタと無線で接続されたアクセスポイ
ントとを有し、前記アクセスポイントが所定の一定間隔
で信号を常時発し、 前記無線端末との接続状態の監視をおこなう監視手段を
有することを特徴とする無線ＬＡＮシステム。1. A computer constituting a wireless terminal, a wireless communication adapter connected to the computer, and an access point wirelessly connected to the wireless communication adapter, wherein the access point transmits a signal at a predetermined constant interval. A wireless LAN system comprising a monitoring unit that constantly emits a message and monitors a connection state with the wireless terminal.
時モニターし、強度を判別し、前記信号の強度がある一
定レベルを下回った時にそれを感知し、 前記アクセスポイントに対して自分のＭＡＣアドレスを
含む特定のパケットを送出することを特徴とする請求項
１記載の無線ＬＡＮシステム。2. The wireless terminal constantly monitors the signal that is constantly emitted, determines the strength of the signal, detects when the strength of the signal falls below a certain level, and notifies the access point of its own MAC. 2. The wireless LAN system according to claim 1, wherein a specific packet including an address is transmitted.
らの特定のパケットを受信すると、前記無線端末のＭＡ
Ｃアドレスを記憶媒体に格納し、前記ＭＡＣアドレスを
表示手段もしくは印字手段によって表示または印字する
ことを特徴とする請求項２記載の無線ＬＡＮシステム。3. When the access point receives a specific packet from the wireless terminal, an MA of the wireless terminal
3. The wireless LAN system according to claim 2, wherein the C address is stored in a storage medium, and the MAC address is displayed or printed by a display unit or a printing unit.
らの特定のパケットを受信すると、前記無線端末のＭＡ
Ｃアドレスをすべての無線端末に送出し、該すべての無
線端末の画面に表示させることを特徴とする請求項２記
載の無線ＬＡＮシステム。4. When the access point receives a specific packet from the wireless terminal, an MA of the wireless terminal
3. The wireless LAN system according to claim 2, wherein the C address is transmitted to all wireless terminals and displayed on the screens of all the wireless terminals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001054402A JP2002261773A (en) | 2001-02-28 | 2001-02-28 | Wireless LAN system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001054402A JP2002261773A (en) | 2001-02-28 | 2001-02-28 | Wireless LAN system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002261773A true JP2002261773A (en) | 2002-09-13 |
Family
ID=18914741
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001054402A Pending JP2002261773A (en) | 2001-02-28 | 2001-02-28 | Wireless LAN system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002261773A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2400711A (en) * | 2003-04-16 | 2004-10-20 | Paul Thomas Dimmer | Wireless alarm system monitoring the position of valuables that is suitable for protecting computers or mobile phones which are using wireless data networks |
| US7251485B2 (en) | 2003-09-17 | 2007-07-31 | Oki Electric Industry Co., Ltd. | Wireless LAN terminal device, portable data terminal system, mobile phone, wireless LAN communication method, method for providing service, and method for transferring incoming call |
| JP2011086175A (en) * | 2009-10-16 | 2011-04-28 | Fujitsu Ltd | Information terminal and computer program |
| US20120155317A1 (en) * | 2003-06-18 | 2012-06-21 | Fisher-Rosemount Systems, Inc. | Wireless Architecture and Support for Process Control Systems |
-
2001
- 2001-02-28 JP JP2001054402A patent/JP2002261773A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2400711A (en) * | 2003-04-16 | 2004-10-20 | Paul Thomas Dimmer | Wireless alarm system monitoring the position of valuables that is suitable for protecting computers or mobile phones which are using wireless data networks |
| US20120155317A1 (en) * | 2003-06-18 | 2012-06-21 | Fisher-Rosemount Systems, Inc. | Wireless Architecture and Support for Process Control Systems |
| US9264973B2 (en) * | 2003-06-18 | 2016-02-16 | Fisher-Rosemount Systems, Inc. | Wireless architecture and support for process control systems |
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