JP2002261773A - Radio lan system - Google Patents

Radio lan system

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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
access point
wireless
wireless terminal
lan system
mac address
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
Application number
JP2001054402A
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Japanese (ja)
Inventor
Atsuhiro Odawara
篤弘 小田原
Original Assignee
Ricoh Co Ltd
株式会社リコー
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ricoh Co Ltd, 株式会社リコー filed Critical Ricoh Co Ltd
Priority to JP2001054402A priority Critical patent/JP2002261773A/en
Publication of JP2002261773A publication Critical patent/JP2002261773A/en
Application status is Pending legal-status Critical

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Abstract

PROBLEM TO BE SOLVED: To obtain a radio LAN system, having an highly practical antitheft function.
SOLUTION: The radio LAN system communicates data among computers (radio terminals) 101, 102, and 103 for connecting radio communication adaptors 201, 202, and 203 via an access point 301. The access point 301 constantly generates a signal at a fixed interval. The radio terminals 101, 102, and 103 are allowed to have a function for measuring the strength of a signal from the access point 301. In the function for measuring the strength, the strength is compared with a preset strength, and a specific packet, including the MAC address of the radio terminal, is transmitted when the level is not exceeded. The access point that has received the transmitted packet stores the MAC address at a storage medium, and displays the MAC address on a liquid crystal or the like, or prints it by a printer or the like, thus reporting that there was a theft.
COPYRIGHT: (C)2002,JPO

Description

【発明の詳細な説明】 DETAILED DESCRIPTION OF THE INVENTION

【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。 The present invention relates to relates to a wireless LAN system and, more particularly, to a wireless LAN system in which the terminal device is connected composed of LAN and wireless.

【0002】 [0002]

【従来の技術】従来、無線LANシステムは、例えば、 Conventionally, wireless LAN system, for example,
無線端末装置を含み構成される。 It constituted comprising a wireless terminal device. 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 The portable terminal of the notebook computer, etc., L by radio in order to take advantage of the mobility sufficiently
ANを構築するケースが増えている。 Case to build the 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。 [0003] As prior invention example similar to the present invention and art, there is a "anti-theft device" disclosed in Japanese Patent Laid-Open No. 9-27087. 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。 In the present prior invention example, it features a computer antitheft device connected with the main line to the computer equipment installation site, to form a closed circuit by connecting a signal line between the devices. 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。 By "anti-theft device" of the present structure, when the computer device is stolen, since the cut always whether the signal line is disconnected, senses it in disconnection detecting circuit, working to prevent theft by generating a siren 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。 [SUMMARY OF THE INVENTION However, considered more easy to be stolen is a mobile terminal device. 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。 Thus, with more effective anti-theft function of the portable terminal apparatus, it is required to achieve the anti-theft by the 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。 [0005] The present invention aims to provide a wireless LAN system having a highly effective theft prevention function.
より詳細には、下記となる。 More specifically, the following.

【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。 [0006] In the present invention of claim 1, wherein, to monitor the connection status with the access point connected with the wireless terminal and the wireless.

【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。 [0007] In the present invention of claim 2, wherein, to determine the connection state of the wireless terminal from the change in intensity of the radio signal, when the wireless terminal is about to be stolen, and sends the MAC address of the wireless terminal, tell that it has been 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 [0008] In the present invention of claim 3, wherein, the access point receiving the MAC address from the wireless terminal, 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。 Stores the address in the storage medium, to display the MAC address on the display means such as liquid crystal, printed on printing means such as a printer, indicating that 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。 [0009] In the invention of claim 4, wherein the access point receiving the MAC address of from wireless terminal sends the MAC address to all the wireless terminals, to display on the screen of all the wireless terminals, the MAC indicating that the radio terminal address is 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。 Means for Solving the Problems] To achieve the above object, a wireless LAN system of the present invention includes a wireless communication adapter connected to the computer and the computer constituting the wireless terminal, it is connected by wireless communication adapter and radio and a access point emits the access point at all times a signal at a predetermined constant distance, is characterized by having a monitoring means for monitoring the connection state of the wireless terminal.

【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。 [0011] In the present invention of claim 2, wherein, in the wireless LAN system according to claim 1, originating access point at all times a signal at a predetermined constant distance, the strength of the signal the signal is given wireless terminal constantly monitors it senses when below a certain level, characterized by sending a specific packet including its MAC address 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 [0012] In a third aspect of the present invention, in the wireless LAN system according to claim 2, wherein, when the access point receives a specific packet from the wireless terminal, the wireless terminal 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。 Stores the AC address in the storage medium, and displaying or printing by the display means or printing means the MAC address.

【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 [0013] In the invention of claim 4, wherein, in the wireless LAN system according to claim 2, wherein, when the access point receives a specific packet from the wireless terminal, the wireless terminal 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。 Sending an AC addresses to all of the wireless terminals, and wherein the to be displayed on the screen of the 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。 BEST MODE FOR CARRYING OUT THE INVENTION Next, a description with reference to the accompanying drawings of embodiments of a wireless LAN system according to the present invention in detail. 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。 Referring to FIG. 1, one embodiment of a 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) [0015] In FIG. 1, a wireless LAN system applied to the embodiment of the present invention, a computer (wireless terminal)
101、102、103と、無線通信アダプタ201、 And 101, 102, 103, wireless communication adapter 201,
202、203と、アクセスポイント301とを有して構成される。 And 202 and 203, configured to have an access point 301. コンピュータ(無線端末)101、10 Computer (wireless terminal) 101,10
2、103は、それぞれが無線通信アダプタ201、2 2,103, each wireless communication adapter 201,2
02、203と接続され、無線通信アダプタ201、2 It is connected to 02,203, the wireless communication adapter 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。 02,203 and the access point 301 are connected wirelessly.

【0016】図1は、無線通信アダプタ201、20 [0016] FIG. 1, wireless communication adapter 201,20
2、203を接続したコンピュータ(無線端末)10 Computers connected to 2,203 (wireless terminal) 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。 The data communication between 1,102,103 is a diagram showing a configuration example of a wireless LAN system to perform through the access point 301. 更に他のネットワークと接続する場合は、 Further, when connecting to other networks,
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。 Connect the wired LAN to the access point may be the other end to the other 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。 [0017] The access point 301 of FIG. 1 is always at a certain interval, to generate a signal. 無線端末101、10 Wireless terminal 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。 The 2,103, and have the ability to measure the intensity of the signal from the access point. 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。 In function of measuring the intensity, and constantly compared with the intensity previously set, and sends a specific packet including the MAC address of the wireless terminal when below that level.

【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。 [0018] The access point 301 that has received the sent packet, indicating that the wireless terminal is stolen. 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。 Procedure example to indicate that this that stolen are as follows.

【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。 Firstly, to store the MAC address in the storage medium, to display the MAC address on the display unit of the liquid crystal or the like, and printed by printing means such as a printer.

【0020】次に、すべての無線端末101、102、 [0020] Next, all of the wireless terminals 101 and 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 The MAC address is sent to the 103, to display on the screen of all the wireless terminals 101, 102, 103, the 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。 AC address of the wireless terminal is to visible state that it 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。 As evidenced by the above description, the wireless LAN system of the first aspect of the present invention, constantly emits a signal at regular intervals of the wireless communication adapter and connected access point wirelessly predetermined wireless terminal , and the monitoring of the connection state of the wireless terminal. 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 Therefore, in the portable terminal such as a notebook personal computer, a wireless in order to take advantage of the mobility sufficiently 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。 Although the case of constructing the AN is increasing, the portable terminal in easily stolen, it becomes possible to achieve the theft prevention of the 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, it is possible to tell that the wireless terminal when the information is to be stolen, and sends the MAC address of 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 According to the third aspect of the present invention, the access point receiving the MAC address from the wireless terminal, 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。 Stores the AC address in a storage medium, or display the MAC address on the display means such as liquid crystal, by printing on printing means such as a printer, it is possible to inform that it 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、 According to the fourth aspect of the present invention, the access point receiving the MAC address of from the wireless terminal,
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。 And sends the MAC address to all the wireless terminals, by displaying on the screen of all the wireless terminals, it is possible to inform the wireless terminal of the MAC address is stolen.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

【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。 1 is a conceptual diagram illustrating an embodiment of a wireless LAN system of the present invention.

【符号の説明】 DESCRIPTION OF SYMBOLS

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 the access point

Claims (4)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】 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、 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 connection wireless communication adapter to the computer and the computer configuring a wireless terminal, said and an access point connected with the wireless communication adapter and the radio, the access point signal at predetermined regular intervals emits constantly wireless LAN system, characterized in that it comprises a monitoring means for monitoring a connection state between the wireless terminal.
  2. 【請求項2】 前記常時発した信号を前記無線端末が常時モニターし、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。 Wherein monitoring the said constantly emits signals wireless terminal constantly, the strength was determined to sense it when below a certain level the intensity of the signal, its MAC to the access point wireless LAN system according to claim 1, wherein sending a specific packet including the address.
  3. 【請求項3】 前記アクセスポイントが前記無線端末からの特定のパケットを受信すると、前記無線端末のMA When wherein said access point receives a specific packet from said wireless terminal, MA said wireless terminal
    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。 Wireless LAN system according to claim 2, wherein the storing the C address to the storage medium, to display or printed by display means or printing means the MAC address.
  4. 【請求項4】 前記アクセスポイントが前記無線端末からの特定のパケットを受信すると、前記無線端末のMA When wherein said access point receives a specific packet from said wireless terminal, MA said wireless terminal
    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。 Wireless LAN system according to claim 2, wherein the sending the C address to all of the wireless terminal, to be displayed on the screen of the all the wireless terminals.
JP2001054402A 2001-02-28 2001-02-28 Radio lan system Pending JP2002261773A (en)

Priority Applications (1)

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Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2001054402A JP2002261773A (en) 2001-02-28 2001-02-28 Radio lan system

Publications (1)

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Family Applications (1)

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Cited By (4)

* Cited by examiner, † Cited by third party
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

Cited By (6)

* Cited by examiner, † Cited by third party
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
US9992726B2 (en) 2003-06-18 2018-06-05 Fisher-Rosemount Systems, Inc. Wireless architecture and support for process control systems
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

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