JP2005184830A - 高速無線lanシステム - Google Patents
高速無線lanシステム Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/7163—Spread spectrum techniques using impulse radio
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/08—Access point devices
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
- H04B10/112—Line-of-sight transmission over an extended range
- H04B10/1123—Bidirectional transmission
- H04B10/1125—Bidirectional transmission using a single common optical path
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/10—Small scale networks; Flat hierarchical networks
- H04W84/12—WLAN [Wireless Local Area Networks]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
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Abstract
【解決手段】 高速無線LANシステムにおいて、送受信データを暗号化してUWB通信方式でアクセスポイントと通信して、暗号化キーをIR通信方式でアクセスポイントと通信する移動機器と、所定のサービス領域に設置されサービス領域に位置した移動機器と送受信データ及び暗号化キーをUWB及びIR通信方式で通信して送受信データ及び暗号化キーを遠隔地のゲートウェイと光通信方式で送受信して移動機器とゲートウェイとの間を中継するアクセスポイントと、内部網と外部網との間の光インターフェースを提供してアクセスポイントと光通信方式で通信して送受信データ及び暗号化キーを送受信するゲートウェイサブモジュールを備え外部網から送信される加入者サービスをアクセスポイントに送るゲートウェイとを含む。
【選択図】 図3
Description
311:IR光アンテナ
312:UWBモジュール
313:UWBアンテナ
316:IRモジュール
320:UWB/IR併合アクセスポイント
321:IR光アンテナ
323:UWBアンテナ
324a:UWB光送受信機
324b:IR光送受信機
326:光信号結合/分配機
330:UWB/IR併合ゲートウェイサブモジュール
332:UWBモジュール
334a:UWB光送受信機
334b:IR光送受信機
336:IRモジュール
340、350:光ファイバ
Claims (8)
- 送受信データ信号を所定の暗号化方式で暗号化し、UWB(Ultra Wide-band)通信方式で通信すると共に、暗号化キー信号をIR(Infra-Red)通信方式で通信する移動機器と、
複数のサービス領域にそれぞれ設置され、該サービス領域に位置する前記移動機器と前記暗号化された送受信データ信号を前記UWB通信方式で受信すると共に、前記暗号化キー信号を前記IR通信方式で受信し、前記移動機器からの前記送受信データ信号及び前記暗号化キー信号を光ファイバ通信方式で中継する複数のアクセスポイントと、
内部網と外部網との間の光インターフェースを備え、前記複数のアクセスポイントと、それぞれ前記光ファイバ通信方式で通信し、前記送受信データ信号及び前記暗号化キー信号を送受信する複数のゲートウェイサブモジュールを備え、前記外部網から送信される加入者サービスを、前記各アクセスポイントに送信するゲートウェイと、
を備えることを特徴とする高速無線LANシステム。 - 前記移動機器は、
前記暗号化キー信号を前記IR通信方式で前記アクセスポイントと送受信するIRモジュールと、
UWBアンテナを通じて前記送受信データ信号を前記アクセスポイントと前記UWB通信方式で送受信し、UWB・PHY階層では、前記UWBアンテナを通じて送受信された前記送受信データ信号をUWB・MAC(Media Access Control)階層に伝達し、前記UWB・MAC階層では、前記UWB・PHY階層を通じて前記送受信データ信号をやり取りすると共に、前記暗号化キー信号を前記IRモジュールとやり取りをし、上位階層で、前記送受信データ信号及び前記暗号化キー信号とをインターフェースするUWBモジュールと、
を備えることを特徴とする請求項1に記載の高速無線LANシステム。 - 前記ゲートウェイサブモジュールは、
前記送受信データ信号を、第1の光ファイバと第2の光ファイバを通じて、対応する前記アクセスポイントと送受信するUWB光送受信機と、
前記暗号化キー信号を、第1の光ファイバと第2の光ファイバを通じて、対応する前記アクセスポイントと送受信するIR光送受信機と、
UWB・PHY階層では、前記送受信データ信号を前記UWB光送受信機と送受信し、
UWB・MAC(Media Access Control)階層では、前記送受信データ信号を前記UWB・PHY階層を通じてやり取りすると共に、前記暗号化キー信号を前記IR光送受信機とやり取りをし、上位階層で、前記送受信データ信号及び前記暗号化キー信号とをインターフェースするUWBモジュールと、
を備えることを特徴とする請求項1に記載の高速無線LANシステム。 - 前記アクセスポイントは、
前記ゲートウェイサブモジュールから前記第1の光ファイバを通じて送信された前記送受信データ信号を、前記移動機器へUWBアンテナを通じて前記UWB(Ultra Wide-band)通信方式で無線送信し、前記UWBアンテナが受信した前記移動機器からの前記送受信データ信号を、前記ゲートウェイサブモジュールに前記第2の光ファイバを通じて送信するUWB光送受信機と、
前記ゲートウェイサブモジュールから、前記第1の光ファイバを通じて送信された前記暗号化キー信号を、前記移動機器へIRアンテナを通じて送信し、前記移動機器から前記IRアンテナが受信した前記暗号化キー信号を、前記ゲートウェイサブモジュールに前記第2の光ファイバを通じて送信するIR光送受信機と、
を備えることを特徴とする請求項3に記載の高速無線LANシステム。 - 前記ゲートウェイサブモジュールは、
対応する前記アクセスポイントと一つの光ファイバを通じて送受信する前記送受信データ信号と前記暗号化キー信号を、多重化及び逆多重化するWDM(Wavelength Division Multiplexer)モジュールと、
前記送受信データ信号を、前記WDMモジュールを通じて、前記アクセスポイントと送受信するUWB光送受信機と、
前記暗号化キー信号を、前記WDMモジュールを通じて、前記アクセスポイントと送受信するIR光送受信機と、
UWB・PHY階層では、前記送受信データ信号を前記UWB光送受信機と送受信して、UWB・MAC(Media Access Control)階層では、前記送受信データ信号を、前記UWB PHY階層を通じてやり取りをすると共に、前記暗号化キー信号を前記IR光送受信機とやり取りをし、上位階層で、前記送受信データ信号及び前記暗号化キー信号とをインターフェースするUWBモジュールと、
を備えることを特徴とする請求項1に記載の高速無線LANシステム。 - 前記アクセスポイントは、
前記ゲートウェイサブモジュールと前記一つの光ファイバを通じて送受信する前記送受信データ信号と前記暗号化キー信号とを、多重化及び逆多重化するWDMユニットと、
前記WDMユニットを通じて送信された前記送受信データ信号を、前記移動機器にUWBアンテナを通じて前記UWB通信方式で無線送信し、前記移動機器からの前記UWBアンテナによって受信された送受信データ信号を、前記ゲートウェイサブモジュールに前記一つの光ファイバを通じて送信するUWB光送受信機と、
前記WDMユニットを通じて受信した暗号化キー信号を、IRアンテナを通じて送信し、前記移動機器から前記IRアンテナを通じて受信した暗号化キー信号を、前記一つの光ファイバを通じて前記ゲートウェイサブモジュールに送信するIR光送受信機と、
を備えることを特徴とする請求項5に記載の高速無線LANシステム。 - 前記ゲートウェイサブモジュールは、
互いに異なる中心波長を有するチャンネル別にそれぞれ前記IR通信方式による暗号化キー信号及び前記UWB信号方式による送受信データ信号とを送受信する2チャンネルアレイ光送受信モジュールと、
前記2チャンネルアレイ光送受信モジュールの前記IR通信方式による暗号化キー信号及び前記UWB通信方式による送受信データ信号とを多重化及び逆多重化して、一つの光ファイバを通じて前記アクセスポイントと送受信するWDMモジュールと、
を備えることを特徴とする請求項1に記載の高速無線LANシステム。 - 前記アクセスポイントは、
前記ゲートウェイサブモジュールと前記一つの光ファイバを通じて送受信する前記送受信データ信号と前記暗号化キー信号とを、多重化及び逆多重化するWDMユニットと、
前記ゲートウェイサブモジュールから送信され前記WDMユニットを通じて受信した前記送受信データ信号に該当する光信号を電流に変換して、UWBアンテナを通じて無線送信し、前記UWBアンテナを通じて受信した前記送受信データ信号に従って利得が増幅された光信号を出力して前記WDMユニットを通じて前記ゲートウェイサブモジュールに送信するSOA(Semiconductor Optical Amplifier)と、
前記WDMユニットを通じて受信した暗号化キー信号を、前記移動機器に前記IR通信方式で送信し、前記WDMユニットを通じて前記ゲートウェイサブモジュールに送信するために前記移動機器から送信された暗号化キー信号を受信するIR光アンテナと、
を備えることを特徴とする請求項7に記載の高速無線LANシステム。
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KR1020030094583A KR100617671B1 (ko) | 2003-12-22 | 2003-12-22 | 고속 무선 랜 시스템 |
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US20050135811A1 (en) | 2005-06-23 |
US7450854B2 (en) | 2008-11-11 |
KR100617671B1 (ko) | 2006-08-28 |
JP4134018B2 (ja) | 2008-08-13 |
KR20050063211A (ko) | 2005-06-28 |
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