JP2010534450A - RoFワイヤレスピコセルラーシステムのためのマルチポート型アキュムレータ装置 - Google Patents
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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
- H04B10/80—Optical aspects relating to the use of optical transmission for specific applications, not provided for in groups H04B10/03 - H04B10/70, e.g. optical power feeding or optical transmission through water
- H04B10/806—Arrangements for feeding power
- H04B10/808—Electrical power feeding of an optical transmission system
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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
- H04B10/25—Arrangements specific to fibre transmission
- H04B10/2575—Radio-over-fibre, e.g. radio frequency signal modulated onto an optical carrier
- H04B10/25752—Optical arrangements for wireless networks
- H04B10/25753—Distribution optical network, e.g. between a base station and a plurality of remote units
- H04B10/25754—Star network topology
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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
- H04W88/085—Access point devices with remote components
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Abstract
Description
図1は、光ファイバ利用型RoFワイヤレスピコセルラーシステム10の一般化された例示の実施形態の略図である。システム10は、ヘッドエンドユニット20、分配ユニット26、少なくとも1つのRoFトランスポンダユニット(「トランスポンダ」)30、ヘッドエンドユニットを分配ユニットに光結合する一次光ファイバRF通信リンク34及び1つ又は2つ以上のトランスポンダを分配ユニットに結合する少なくとも1つの二次光ファイバRF通信リンク36を有し、かくして、トランスポンダとヘッドエンドユニットが互いに結合されている。例示の実施形態では、光ファイバRF通信リンク34,36は、少なくとも1本の光ファイバ、好ましくは、2本の光ファイバ(例えば、以下に説明するようにアップリンク光ファイバ及びダウンリンク光ファイバ)を有する。以下に詳細に説明するように、システム10は、実質的に中心がトランスポンダ30に一致しているピコセル40を形成するようになっている。1つ又は2つ以上のトランスポンダ30は、ピコセルラーカバレージエリア44を形成している。分配ユニット26は、一次光ファイバRF通信リンク34を多数の二次RF光ファイバ通信リンク(以下、「テールケーブル」という)36に分割するようになっており、テールケーブルは、所与のインフラストラクチャ全体における多数のトランスポンダ30の分配を容易にする。
上述したように、トランスポンダの線形配列を採用したRoFワイヤレスピコセルラーシステムには、その製造及び配備に関して幾つかの欠点がある。したがって、本発明の一観点は、トランスポンダ30をよりコンパクトであり且つより容易に製造できると共に配備できるRoFワイヤレスピコセルラーシステムに統合することによってこれら欠点及び他の欠点に取り組む。
図11は、図1に示されているRoFワイヤレスピコセルラーシステムに類似しているが、トランスポンダ30を配備するために本発明の1つ又は2つ以上のマルチポート型アキュムレータ200を利用したRoFワイヤレスピコセルラーシステム10の例示の実施形態の略図である。図11の最も下に位置するマルチポート型アキュムレータは、図9及び図10と関連して説明した上述のあらかじめスタブが取り付けられた形態をしていることに注目されたい。
図13は、指向性が調節可能なアンテナシステムを有するトランスポンダ30の例示の実施形態を示している。図13のトランスポンダ30は、各々が互いに異なる指向性(即ち、EM放射線パターン)を有する2つ又は3つ以上のアンテナ要素101、例えば図示の3つのアンテナ要素101A,101B,101Cを有している。アンテナ要素101は、アンテナスイッチ300に電気的に接続されており、このアンテナスイッチは、使用されるべきアンテナシステム100のアンテナ要素101を切り換える。
説明の目的上、マルチポート型アキュムレータ200は、4つのトランスポンダ30を支持した矩形のハウジング202と関連して上述されている。図14は、6つのトランスポンダ30を作動的に支持した六角形のマルチポート型アキュムレータ200の例示の実施形態の概略平面図である。同様に、図15は、3つのトランスポンダ30を作動的に支持した三角形のハウジングを備えたマルチポート型アキュムレータ200の例示の実施形態の概略平面図である。本発明の別の実施形態は、任意の幾何学的形態の任意の数のトランスポンダを有する変形例としてのアキュムレータを含む。
Claims (20)
- 2つ又は3つ以上のRoF(radio-over-fiber)トランスポンダを作動的に支持し、アップリンク及びダウンリンク光信号及び電力を運ぶテールケーブルへの結合を提供するマルチポート型アキュムレータ装置であって、
ハウジングを有し、
前記ハウジングによって支持された2つ又は3つ以上のRoFトランスポンダポートを有し、各RoFトランスポンダポートは、前記RoFトランスポンダの各々にそれぞれ作動的に結合するよう構成されており、
前記ハウジングによって支持されていて、前記テールケーブルに作動的に結合するよう構成されたテールケーブルポートを有し、前記テールケーブルポートは、前記アップリンク及びダウンリンク光信号並びに前記電力を各RoFトランスポンダに提供するよう各RoFトランスポンダポートに光学的に結合されると共に電気的に結合されている、
ことを特徴とする装置。 - 前記テールケーブルポートは、前記テールケーブルによって支持されたアップリンク及びダウンリンク光ファイバの2つ又は3つ以上の外部対を受け入れるようになっており、
前記テールケーブルポートは、アップリンク及びダウンリンク光ファイバ部分の2つ又は3つ以上の内部対を介してそれぞれ前記2つ又は3つ以上のRoFトランスポンダポートに光結合されており、
前記テールケーブルポートは、前記アップリンク及びダウンリンク光ファイバの外部対を前記アップリンク及びダウンリンク光ファイバの内部対に光結合するよう構成されている、
請求項1記載の装置。 - 前記テールケーブルポートは、前記テールケーブルによって支持されていて、前記電力を運ぶ外部電力ラインを受け入れるようになっており、
前記テールケーブルポートは、2つ又は3つ以上の内部電力ライン部分によりそれぞれ前記2つ又は3つ以上のRoFトランスポンダポートに電気的に結合されており、
前記テールケーブルポートは、電力を前記RoFトランスポンダの各々に提供するよう前記外部電力ラインを前記2つ又は3つ以上の内部電力ライン部分に電気的に結合するよう構成されている、
請求項2記載の装置。 - 前記ハウジングは、4つの側壁及び4つのRoFトランスポンダポートを有し、各トランスポンダポートは、各側壁によってそれぞれ支持されている、
請求項1記載の装置。 - 前記装置には、ピコセルラーカバレージエリアが関連しており、前記ピコセルラーカバレージエリアは、前記2つ又は3つ以上のRoFトランスポンダによりそれぞれ形成された2つ又は3つ以上のピコセルラーカバレージサブエリアで構成されている、
請求項1記載の装置。 - 前記RoFトランスポンダのうちの少なくとも1つは、調節可能なアンテナ指向性を備えたアンテナシステムを有する、
請求項1記載の装置。 - 前記RoFトランスポンダのうちの少なくとも1つは、パッチアンテナを有する、
請求項1記載の装置。 - RoFワイヤレスピコセルラーシステムであって、請求項1記載のマルチポート型アキュムレータ装置を2つ又は3つ以上有し、各マルチポート型アキュムレータ装置は、前記テールケーブルの各々にそれぞれ対応関係をなして光結合されている、RoFワイヤレスピコセルラーシステム。
- ダウンリンク光信号を発生させ、アップリンク光信号を受け取るよう構成されたヘッドエンドユニットと、
前記アップリンク及びダウンリンク光信号を各マルチポート型アキュムレータ装置の前記トランスポンダと前記ヘッドエンドユニットとの間で分配するよう前記ヘッドエンドユニット及び各テールケーブルに光結合された分配ユニットとを更に有する、
請求項8記載のRoFワイヤレスピコセルラーシステム。 - RoF(radio-over-fiber)ワイヤレスピコセルラーカバレージエリアを形成する方法であって、
2つ又は3つ以上のRoFトランスポンダをハウジングで作動的に支持するステップと、
前記2つ又は3つ以上のRoFトランスポンダのためのダウンリンク光信号をテールケーブルにより前記ハウジングに設けられているテールケーブルポートに提供するステップと、
前記ハウジングを介して前記ダウンリンク光信号を前記RoFトランスポンダのうちの1つ又は2つ以上に分配して前記1つ又は2つ以上のRoFトランスポンダがピコセルラーカバレージエリアの形成に寄与するようにするステップとを有する、
ことを特徴とする方法。 - 各RoFトランスポンダは、前記ダウンリンク光信号を受け取り、前記ピコセルラーカバレージエリアの一部分を構成するピコセルラーカバレージサブエリアを形成する、
請求項10記載の方法。 - 前記2つ又は3つ以上のRoFトランスポンダを前記テールケーブルポートに光学的に結合されると共に電気的に結合されたRoFトランスポンダポートのところで作動的に支持するステップを更に有する、
請求項10記載の方法。 - 前記テールケーブル中の電力を電力ラインで運ぶステップと、
前記ハウジングを介して電力を前記テールケーブルポート及び前記RoFトランスポンダポートの各々に接続された電力ライン部分に分配して前記RoFトランスポンダの各々に電力供給するステップとを更に有する、
請求項12記載の方法。 - 各RoFトランスポンダは、アンテナシステムを有し、前記方法は、前記アンテナシステムのうちの少なくとも1つの指向性を調節して前記ピコセルラーカバレージエリアへの前記対応のRoFをトランスポンダの寄与度を調節するステップを更に有する、
請求項10記載の方法。 - RoF(radio-over-fiber)ワイヤレスピコセルラーシステムのための複数のRoFトランスポンダを支持するマルチポート型アキュムレータ装置であって、
ハウジングを有し、
前記ハウジングによって支持された複数のRoFトランスポンダポートを有し、各RoFトランスポンダポートは、前記RoFトランスポンダの各々にそれぞれ作動的に結合するようになっており、
前記ハウジング内において前記複数のRoFトランスポンダポートに光学的に結合されていて、前記複数のRoFトランスポンダポートとの間でアップリンク及びダウンリンク光信号の光伝送を可能にするテールケーブルを有し、
前記テールケーブルは、電力を前記複数のRoFトランスポンダポートの各々に提供するよう前記ハウジング内において前記複数のRoFトランスポンダポートに電気的に結合されている、
ことを特徴とする装置。 - 各RoFトランスポンダポートにそれぞれ作動的に結合されたRoFトランスポンダを更に有する、
請求項15記載の装置。 - 各RoFトランスポンダは、指向性アンテナシステムを有し、前記指向性アンテナシステムは、関連のピコセルラーカバレージサブエリアを形成するよう構成され、前記ピコセルラーカバレージサブエリアは、前記RoFトランスポンダのうちの2つ又は3つ以上により形成されるピコセルラーカバレージエリアを構成する、
請求項16記載の装置。 - 前記ハウジングによって支持され、各RoFトランスポンダポートに光学的に結合されると共に電気的に結合されたテールケーブルポートと、
テールケーブル端部のところで前記テールケーブルに作動的に固定されたテールケーブルプラグとを更に有し、
前記テールケーブルは、前記テールケーブルプラグにより前記テールケーブルポートに作動的に結合されている、
請求項15記載の装置。 - 請求項18記載の装置を2つ又は3つ以上有するRoFワイヤレスピコセルラーシステム。
- 各RoFトランスポンダポートは、前記ハウジングの内部に位置するダウンリンク及びアップリンク光ファイバ部分により前記テールケーブルポートに光結合されている、
請求項18記載の装置。
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US11/880,839 US20100054746A1 (en) | 2007-07-24 | 2007-07-24 | Multi-port accumulator for radio-over-fiber (RoF) wireless picocellular systems |
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JP2010534450A true JP2010534450A (ja) | 2010-11-04 |
JP2010534450A5 JP2010534450A5 (ja) | 2011-09-08 |
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US (2) | US20100054746A1 (ja) |
EP (1) | EP2168272A1 (ja) |
JP (1) | JP2010534450A (ja) |
CN (1) | CN101803246B (ja) |
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- 2008-07-23 WO PCT/US2008/008929 patent/WO2009014710A1/en active Application Filing
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- 2008-07-23 EP EP08780291A patent/EP2168272A1/en not_active Withdrawn
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2012
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EP2168272A1 (en) | 2010-03-31 |
TW200919992A (en) | 2009-05-01 |
CN101803246B (zh) | 2014-05-14 |
CN101803246A (zh) | 2010-08-11 |
WO2009014710A1 (en) | 2009-01-29 |
US8867919B2 (en) | 2014-10-21 |
US20100054746A1 (en) | 2010-03-04 |
US20120121270A1 (en) | 2012-05-17 |
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