JP5649588B2 - イーサネット信号を搬送するケーブルを用いる通信システム - Google Patents
イーサネット信号を搬送するケーブルを用いる通信システム Download PDFInfo
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Description
この周波数帯域内の信号は銅線109に与えられ、銅線109を介してリモート・ユニットに到達する。このリモート・ユニットも、ミキサ112と、ローカル発振器114と、帯域フィルタ118とを含む。F3の信号は、ミキサ112内で、ローカル発振器114により生成された周波数F5の信号と混合される。ミキサ112の出力点にあるローカル発振器118は、必要な周波数帯域例えばF6=F5−F3を選択する。
F6の信号がF1の信号の正確なレプリカであるためには、F5はF2と同一の周波数でなければならない。即ちローカル発振器106と114は、同一周波数にロックしなければならない。この為、基準信号は、ハブ・ユニットにあるローカル発振器に与えられ、そして、その信号は、リモート・ユニットにあるローカル発振器に送信され、それを同一周波数にロックする。
図1の実施例においては、基準信号生成器120は、ハブ・ユニットのローカル発振器106を同期させる。専用のリソース例えば実際のケーブル122あるいはケーブル109内の専用帯域を用いて、ハブ・ユニット内の基準信号生成器120からの信号をリモート・ユニットに送信する。特許文献1は、ハブ・ユニットとリモート・ユニットとの間で「中間周波数」の「基準トーン」を転送することを提案しており、これは銅線を通るには十分に低い周波数である。
前記複数のエンドポイント装置の内の第1のエンドポイント装置において、
(a)前記第1周波数帯域で搬送された第1信号を、有線インフラ上を伝搬する第2周波数帯域搬送される信号に変換するステップと、
(b)前記第1周波数帯域から第2周波数帯域に、また前記第2周波数帯域から前記第1周波数帯域に変換するときにも使用される基準信号をパケット・ストリームに入れ込むステップであって、前記基準信号は、前記パケット・ストリームから再生されるものであるステップと、
(c)前記パケット・ストリームと前記変換された第1信号を、前記有線インフラ上に送出するステップと、
前記複数のエンドポイント装置の第2のエンドポイント装置において、
(d)前記基準信号を、前記パケット・ストリームから再生するステップと、
(f)前記第2周波数帯域を介して搬送された第1信号を、前記第1周波数帯域で搬送される信号に変換するために、前記再生された基準信号を使用するステップと、
を有する、方法が提供される。
本発明の一実施例によれば、第1のローカル・オシレータを、前記第1のエンドポイント装置内で、前記第1信号を変換する際に用い、第2のローカル・オシレータを、前記第2のエンドポイント装置内で、前記第1信号を変換するのに用い、前記第1と第2のローカル・オシレータは、前記基準信号で同期している。
本発明の一実施例によれば、前記パケット・ストリームは、同期したイーサネット・ストリームである。
本発明の一実施例によれば、前記第1のビットレートは、受領したイーサネット信号で用いられ、前記第2のビットレートは、前記同期したイーサネット・ストリームで用いられ、前記第2のビットレートは、前記第1のビットレートよりも5%以上高い。
本発明の一実施例によれば、前記パケット・ストリームは、前記第2のエンドポイント装置に搭載された電子回路を管理するデータを含む。
本発明の一実施例によれば、前記パケット・ストリームは、前記第2のエンドポイント装置に搭載された電子回路の同期化信号を含む。
本発明の一実施例によれば、前記第1信号の変換されたレプリカは、前記パケット・ストリームのあるフレーム内に、デジタル形式で含まれる。
本発明の一実施例によれば、前記第1周波数帯域は、FDMA、CDMA、TDMA、PDMAの通信方式の内の1つで動作するセルラー周波数帯域である。
本発明の一実施例によれば、アップリンク信号が、前記リモート・ユニットからハブ・ユニットに、有線インフラを介して送信され、前記アップリンク信号は、アップリンクの周波数帯域を介して送信され、前記アップリンク信号は、
前記リモート・ユニットにおける、
(i)前記基準信号に関連した前記アップリンク周波数帯域を介して搬送された前記アップリンク信号を、前記有線インフラ上を伝搬する、前記基準信号に関連したダウンコンバートされたアップリンク周波数帯域を介して搬送されるようダウンコンバートするステップと、
(ii)前記ダウンコンバートされたアップリンク信号を、前記有線インフラ上に送出するステップと、
前記ハブ・ユニットにおける、
(iii)前記ダウンコンバートされたアップリンク周波数帯域を介して搬送される前記ダウンコンバートされたアップリンク信号を、前記アップリンク周波数帯域を介して搬送されるようアップコンバートするステップと、
により送信され、
これにより、アップコンバートされたアップリンク信号を、携帯電話の基地局あるいは中継局に提供する。
(a)前記第1周波数帯域で搬送された第1信号を、イーサネット・インフラ上を伝搬する第2周波数帯域で搬送される信号に変換する周波数変換装置と、
(b)前記第1周波数帯域と第2周波数帯域に関連する基準信号と、前記第1のエンドポイント装置で受領したイーサネット信号とを1つの同期したイーサネット・ストリームに組み合わせるパケット同期化装置であって、前記基準信号は、前記同期したイーサネット・ストリームから再生可能である、パケット同期化装置と、
を有し、これにより、前記同期したイーサネット・ストリームと前記変換された第1信号がイーサネット・インフラに与えられ、リモート・ユニットに到着したときに、前記基準信号は、前記同期したイーサネット・ストリームから再生され、前記第2周波数帯域を介して搬送される前記変換された第1信号は、前記第1周波数帯域を介して搬送される信号にシフトされ、前記シフトされた第1信号は、前記第1周波数帯域を介して無線で通信される、ハブ・ユニットが提供される。
(i)前記基準信号と同期した信号を生成するローカル・オシレータと、
(ii)前記第1信号と前記信号を受領し、その和の信号と差の信号を生成するミキサと、
(iii)前記複数の和の信号と差の信号から適宜の信号を選択するフィルタと、
を有する。
本発明の一実施例によれば、前記ハブ・ユニットは、携帯電話基地局又は中継局と関連し、前記第1信号は、ダウンリンク信号である。
本発明の一実施例によれば、前記同期したイーサネット・ストリームは、同期したイーサネット・ストリームである。
本発明の一実施例によれば、前記同期したイーサネット・ストリームのビットレートは、前記受領したイーサネット信号のビットレートよりも5%以上高い。
本発明の一実施例によれば、前記パケット同期化機は、前記第1信号のレプリカを、デジタルの形式で、前記同期したイーサネット・ストリームのフレーム内に入れる。
前記ハブ・ユニットとリモート・ユニットは、アップリンクとダウンリンクの無線周波数帯域の無線装置に関連し、
前記アップリンク信号は、無線アップリンク周波数帯域を介して最初は送信され、
前記リモート・ユニットは、
(a)前記ハブ・ユニットからの同期したイーサネット・ストリームを受領し、前記同期したイーサネット・ストリームのデータレートに関連する周波数の信号をデジタルフェーズロックループに与えるパケット・オープナと、
(b)前記同期したイーサネット・ストリームのデータレートに関連する周波数の信号を受領し、基準信号を抽出するデジタルフェーズロックループと、
(c)前記基準信号で関連付けられた無線アップリンク周波数帯域を介して搬送されるアップリンク信号を、前記イーサネットワイヤリング上を伝搬できる、前記基準信号で関連付けられたダウンコンバートされたアップリンク周波数帯域で搬送される信号に変換する周波数変換セクションと、
を有し、
それによって、前記ダウンコンバートされたアップリンク信号は、前記イーサネットワイヤリングに送られ、
前記ハブ・ユニットに到達した時に、前記ダウンコンバートされたアップリンク信号は、前記ダウンコンバートされたアップリンク周波数帯域を介して搬送される信号から、前記アップリンクの周波数帯域を介して搬送される信号に、アップコンバートされ、無線装置に提供される、リモート・ユニットが提供される。
(i)イーサネット・パケット・リビルダであって、
(A)前記パケット・オープナから、前記同期したイーサネット・ストリームのコンテンツを受領し、
(B)イーサネットの宛先に送信するために、前記コンテンツの少なくとも一部を有する非同期のイーサネット信号を生成する、
ためのイーサネット・パケット・リビルダと、
(ii)パケット同期化機であって、
(I)イーサネットソースから非同期のイーサネット信号を受領し、
(II)前記非同期のイーサネット信号のコンテンツの少なくとも一部を有する同期したイーサネット・ストリームを生成する、
ためのパケット同期化機と、
を含む。
本発明の一実施例によれば、前記パケット同期化機は、
(I)他の装置にサービスするデータと、前記リモート・ユニットにある電子回路の状態と動作条件に対する指示と、前記ハブ・ユニットからリモート・ユニットへ送信される制御コマンドと、同期ソースからの同期化データとからなる後記データアイテム群から選択されたデータアイテムを受領し、
(II)生成された同期したイーサネット・ストリーム内に、前記受領したデータアイテムを含める、
ように適合されている。
図4aにおいては、非同期イーサネット信号のパケット620内に8ビットがあり、図4bにおいては、同期イーサネット・ストリーム602の全長のパケット625は、10ビットを含む。後者は前者よりも25%密度が上がっている。
基準信号抽出器226は、10MHzの基準信号を、1秒当たり10メガパケットのデータストリームから抽出する。その後10MHzの信号は、基準信号として周波数合成装置に送られる。この周波数合成装置が、それを用いてローカル発振器224の信号を生成する。この場合、周波数合成装置は、10MHzの基準信号を10で割り算して、1MHzの信号を生成し、それに755で掛け算して、755MHzの信号を生成する。
図6は、本発明による完全な二重化機能を実現するシステム645を示す。以下の説明では、ダウンリンク伝送を最初に、アップリンク伝送を次に説明する。
リモート・ユニット520内で、同期したイーサネット・ストリームは、分離器/混合器512で分離され、リモート・ユニットのパケット・オルガナイザ660内に送られる。そこで、同期したイーサネット・ストリームは分解され、各イーサネット・リンク565とデータ・リンク670と他の同期化リンク680が、それぞれの信号を受領する。 基準信号は、同期したイーサネット・ストリームから抽出され、ローカル発振器224Dに入れられ、このローカル発振器224Dが、混合信号をミキサ220Dに与える。そこで、それは分離器/混合器512から到着したダウンコンバートされたダウンリンク・セルラー信号と混合される。
最後に、帯域通過フィルタ222Dが、ミキサ512の出力から所定のダウンリンク帯域を選択し、それをRFリンク560に与え、そしてエンドユーザ携帯電話装置561に送信される。
パケット・オルガナイザ660は、イーサネット・リンク565からのイーサネット信号と、データ・リンク670からの追加データと、同期化リンク680からの追加同期化信号とを受領する。これらの信号は、全て組み合わされて、唯一の同期したイーサネット・ストリームに結合されるが、これは、ダウンリンクの同期したイーサネット・ストリームから抽出された基準信号と同期が採れている。
ハブ・ユニット510において、同期したイーサネット・ストリームは、分離器/混合器506により分離され、パケット・オルガナイザ650に与えられる。そこで同期したイーサネット・ストリームが分解され、各イーサネット・リンク555とリンク665とリンク675が、それぞれの信号を受領する。
パケット・オルガナイザ650内のクロックは、ローカル発振器206Uに与えられる。このローカル発振器206Uは、混合信号をミキサ204Uに与える。そこで分離器/混合器506から到着したダウンコンバートされたアップリンクセルラー信号と混合される。
最後にフィルタ202Uが、所定のアップコンバートされた周波数帯域を204Uの出力から選択し、それをRFリンク550に与え、携帯電話基地局551又は携帯電話中継器552に送られる。
他のRFリンク560の使用例は、TDD増幅器の切替である。このTDD増幅器は、アップリンク操作状態とダウンリンク操作状態を切り替えるのに必要とされる。同時に追加的データは、リモート・ユニットの電子回路の状態と動作条件を示す。更なる追加的データと同期化信号は、ハブ・ユニット510とリモート・ユニット520の間で送受信される同期したイーサネット・ストリーム内に組み込まれる。
図7のパケット・オルガナイザ650内において、非同期イーサネット・パケット702は、イーサネット・パケット・バッファ708に与えられる。パケット同期化装置710は、適宜の時間にイーサネット・パケット・バッファ708からパケットを取り出し、それらを同期イーサネット・パケット・ストリーム602に挿入する。
追加データ704と他の同期化信号706は、パケット同期化装置710に与えられる。パケット同期化装置710は、イーサネット・パケット702と追加データ704と同期化信号706とを、統合された同期イーサネット・ストリーム602にする。そのストリームは、同期したデータ構造であり、イーサネット・パケット600又702のビットレートよりも高いビットレートを有する等時間のパケットの連続ストリームからなる。
クロック714は、基準信号716をパケット同期化装置710に与え、かくしてイーサネット・ストリーム602がクロック714と同期する。単一の統合した同期イーサネット・ストリーム602が、分離器/混合器506に与えられ、その後リモート・ユニット520にワイヤリング230を介して送信される。基準信号であるクロック信号716は、ハブ・ユニットのローカル発振器206Uと206Dで使用される。
デジタルPLL818は、クロック信号814を再生する。このクロック信号814は、パケット同期化装置810に対する同期化信号として用いられ、かくしてイーサネット・ストリーム812はクロック714と同期する。同期イーサネット・ストリーム812は、分離器/混合器512に与えられ、その後ハブ・ユニット510にワイヤリング230を介して与えられる。再生されたクロック信号814は、ローカル発振器220Uと222Dにより使用され、それぞれアップリンクとダウンリンクのセルラー信号をダウンコンバートする又アップコンバートする。
(1)全ての必要な「追加的データと、同期化データと、受領したイーサネット信号」を含む同期したイーサネット・ストリームが生成される。ハブ・ユニットとリモート・ユニットは、管理データを交換する。この管理データは、リモート・ユニット内の電子回路の状態と動作条件に付いての指示を含む。このデータは、リモート・ユニットで生成されハブ・ユニットに送られる。管理データは、ハブ・ユニットからリモート・ユニットに送られ、電子回路を制御する。
(2)ハブ・ユニットにおいて、同期したイーサネット・ストリームは、クロック信号により同期化される。このクロック信号は、ハブ・ユニットとリモート・ユニットに対する基準信号から取り出されたものである。
(3)リモート・ユニットにおいて、同期したイーサネット・ストリームは、再生された基準信号により同期化される。
(4)リモート・ユニットにおいて、基準信号は、同期したイーサネット・ストリームから、パケット・オープナとデジタルPLLを用いて再生される。
(5)ハブ・ユニットにおいて、基準信号は周波数合成機用の基準信号として用いられる。この基準信号は、アップコンバーターとダウンコンバーターに与えられ、ダウンリンク信号をダウンコンバートし、アップリンク信号をアップコンバートするのに用いられる。
(6)リモート・ユニットにおいて、再生された基準信号は、周波数合成機用の基準信号として用いられ、それはアップコンバーターとダウンコンバーターに与えられて、アップリンク信号をダウンコンバートし、ダウンリンク信号をアップコンバートする。リモート・ユニットにおける基準信号は、その正確な再構成により、ハブ・ユニットの基準信号の周波数と同一である。その為、ダウンリンクの無線信号は、リモート・ユニットで正確に再生され、アップリンクの無線信号は、ハブ・ユニットで正確に再生される。
(7)他の必要な追加的データ、同期化信号、受領したイーサネット信号はそれぞれのリンクに、その側にあるパケット・オープナにより取り出された後与えられる。
アップリンクの周波数帯域とダウンコンバートされたアップリンクの周波数帯域は、イーサネットワイヤリングを介して分配された基準信号に関連する。この基準信号は、ハブ・ユニット510からリモート・ユニット520に同期したイーサネット・ストリームにより分配される基準信号である。
追加データと他の同期信号が同期したイーサネット・ストリームに埋め込まれる(932)。その後、ダウンコンバートされたアップリンク信号は、ハブ・ユニット510にイーサネットワイヤリングで与えられる(935)。ダウンコンバートされたアップリンク信号は、アップリンクの周波数帯域にアップコンバートされ(940)、携帯電話基地局551又は携帯電話中継器552に結合される。ハブ・ユニットからの同期したイーサネット・ストリームのコンテンツが、取り出されハブ側の宛先に分配される(945)。
106 ローカル発振器
108 帯域通過フィルタ
109 銅線
112 ミキサ
114 ローカル発振器
118 帯域通過フィルタ
120 基準信号発生器
122 ケーブル
200 システム
201 ハブ・ユニット
202 ミキサ
203 ポート
204 帯域通過フィルタ
205 リモート・ユニット
206 ローカル発振器
212 同期化コンバータ
214 専用ワイヤ
220 ミキサ
222 帯域通過フィルタ
224 ローカル発振器
226 基準信号抽出器
228 非同期化コンバータ
230 ワイヤリング
232 ワイヤ対
235 無線ポート
240 無線ポート
502 イーサネット交換機
360 イーサネット・ハブ・セクション
380 イーサネット・リモート・セクション
410 RFセクション
420 RFセクション
506,512 分離器/混合器
510 ハブ・ユニット
513 WLANアクセス・ポイント
520,521,522 リモート・ユニット
550 RFリンク
551 携帯電話基地局
552 携帯電話中継器
555 イーサネット・リンク
560 RFリンク
561 エンドユーザ装置
565 イーサネット・リンク
600 非同期のイーサネット・パケット
602 同期したイーサネット・ストリーム
604 同期化信号
606 パケット・データ
608 デジタル化されたRF
620 パケット
625 パケット
630 等長パケット
650 パケット・オルガナイザ
660 パケット・オルガナイザ
665,670 追加データ・リンク
675,675 他の同期リンク
670 データ・リンク
680 同期化リンク
702 非同期イーサネット・パケット
704 追加データ
706 同期化信号
708 イーサネット・パケット・バッファ
710 パケット同期化装置
712 同期イーサネット・ストリーム
714 クロック
716 基準信号
718 イーサネット・パケット・リビルダ
722
724 同期化信号
726 パケット・オープナ
728 同期イーサネット・ストリーム
729 イーサネット高データレート・パケット
802 イーサネット・パケット・バッファ
804 イーサネット非同期パケット
806 追加データ
808 同期化信号
810 パケット同期化装置
812 同期イーサネット・ストリーム
818 デジタルPLL
822 パケット・オープナ
824 追加データ
826 同期化信号
828 イーサネット信号
830 イーサネット・データ
832 イーサネット・パケット・リビルダ
図9
900:携帯電話信号をイーサネット・インフラを用いて通信する方法
905:ダウンリンク信号をダウンコンバートする
910:基準信号と追加信号と他の同期化信号をイーサネット・ストリームに入れ込む
915:イーサネット・ストリームとダウンリンク信号をイーサネット・インフラに提供する
920:基準信号を取り出す
925:ダウンリンク信号をアップコンバートして、イーサネットの宛先に与える
927:イーサネット・ストリームのコンテンツを取り出し分配する
930:アップリンク信号をダウンコンバートする
932:追加信号と他の同期化信号をイーサネット・ストリームに入れ込む
935:アップリンク信号とイーサネット・ストリームをイーサネット・インフラに提供する
940:アップリンク信号をアップコンバートして、宛先に送信する
945:イーサネット・ストリームのコンテンツを取り出し宛先に分配する
Claims (18)
- 最初は第1周波数帯域で搬送される第1信号を、各々が第1周波数帯域の無線装置に関連する複数のエンドポイント装置を有する有線インフラ上で通信する方法であって、
前記複数のエンドポイント装置の内の第1のエンドポイント装置において、
(a)前記第1周波数帯域で搬送された第1信号を、有線インフラ上を伝搬する第2周波数帯域で搬送される信号に変換するステップと、
(b)前記第1周波数帯域から前記第2周波数帯域に、また前記第2周波数帯域から前記第1周波数帯域に変換するときに使用される基準信号をパケット・ストリームに入れ込むステップであって、前記基準信号は、前記パケット・ストリームから再生されるものであるステップと、
(c)前記パケット・ストリームと前記変換された第1信号を、前記有線インフラ上に送出するステップと、
前記複数のエンドポイント装置の第2のエンドポイント装置において、
(d)前記基準信号を、前記パケット・ストリームから再生するステップと、
(f)前記第2周波数帯域を介して搬送された第1信号を、前記第1周波数帯域で搬送される信号に変換するために、前記再生された基準信号を使用するステップと、
を有する、
ことを特徴とする有線インフラ上で第1信号を通信する方法。 - 第1のローカル・オシレータを、前記第1のエンドポイント装置内で、前記第1信号を変換する際に用い、
第2のローカル・オシレータを、前記第2のエンドポイント装置内で、前記第1信号を変換するのに用い、
前記第1と第2のローカル・オシレータは、前記基準信号で同期している
ことを特徴とする請求項1記載の方法。 - 前記パケット・ストリームは、同期したイーサネット(登録商標)・ストリームである
ことを特徴とする請求項1記載の方法。 - 受領した「イーサネット」信号で第1のビットレートが用いられ、
前記同期した「イーサネット」・ストリームで第2のビットレートが用いられ、
前記第2のビットレートは、前記第1のビットレートよりも5%以上高い
ことを特徴とする請求項3記載の方法。 - 前記パケット・ストリームは、前記第2のエンドポイント装置に搭載された電子回路を管理するデータを含む
ことを特徴とする請求項1記載の方法。 - 前記パケット・ストリームは、前記第2のエンドポイント装置に搭載された電子回路の同期化信号を含む
ことを特徴とする請求項1記載の方法。 - 前記第1信号の変換されたレプリカは、前記パケット・ストリームのあるフレーム内に、デジタル形式で含まれる
ことを特徴とする請求項1記載の方法。 - 前記第1周波数帯域は、FDMA、CDMA、TDMA、PDMAの通信方式の内の1つで動作するセルラー周波数帯域である
ことを特徴とする請求項1記載の方法。 - 前記第1のエンドポイント装置は、携帯電話の基地局又は中継局に関連するハブ・ユニットであり、
前記第1信号は、ダウンリンク・セルラー信号であり、
前記第2のエンドポイント装置は、携帯電話のエンドユーザの装置と「イーサネット」の宛先に関連するリモート・ユニットである
ことを特徴とする請求項1記載の方法。 - アップリンク信号が、前記リモート・ユニットからハブ・ユニットに、有線インフラを介して送信され、
前記アップリンク信号は、アップリンクの周波数帯域を介して送信され、
前記アップリンク信号は、
前記リモート・ユニットにおける、
(i)前記基準信号に関連した前記アップリンク周波数帯域を介して搬送された前記アップリンク信号を、前記有線インフラ上を伝搬する、前記基準信号に関連したダウンコンバートされたアップリンク周波数帯域を介して搬送されるようダウンコンバートするステップと、
(ii)前記ダウンコンバートされたアップリンク信号を、前記有線インフラ上に送出するステップと、
前記ハブ・ユニットにおける、
(iii)前記ダウンコンバートされたアップリンク周波数帯域を介して搬送される前記ダウンコンバートされたアップリンク信号を、前記アップリンク周波数帯域を介して搬送されるようアップコンバートするステップと、
により送信され、
これにより、アップコンバートされたアップリンク信号を、携帯電話の基地局あるいは中継局に提供する
ことを特徴とする請求項9記載の方法。 - 第1周波数帯域で搬送される第1無線信号を「イーサネット」・インフラ上で1つ以上のリモート・ユニットに送信するハブ・ユニットであって、前記ハブ・ユニットと各リモート・ユニットは、第1周波数帯域の無線装置に関連している、ハブ・ユニットにおいて、
(a)前記第1周波数帯域で搬送された前記第1無線信号を、「イーサネット」・インフラ上を伝搬する第2周波数帯域で搬送される信号に変換する周波数変換装置と、
(b)基準信号と、前記ハブ・ユニットで受領した「イーサネット」信号とを1つの同期した「イーサネット」・ストリームに組み合わせるパケット同期化装置であって、前記基準信号は、前記1つの同期した「イーサネット」・ストリームから再生可能である、パケット同期化装置と、
を有し、
これにより、前記1つの同期した「イーサネット」・ストリームと前記変換された第1無線信号が「イーサネット」・インフラに与えられ、
リモート・ユニットに到着したときに、前記基準信号は、前記1つの同期した「イーサネット」・ストリームから再生され、
前記第2周波数帯域を介して搬送される前記変換された第1無線信号は、前記第1周波数帯域を介して搬送される信号にシフトされ、
前記シフトされた第1無線信号は、前記第1周波数帯域を介して無線で通信される
ことを特徴とする第1無線信号を「イーサネット」・インフラ上でリモート・ユニットに送信するハブ・ユニット。 - 前記周波数変換装置は、
(i)前記基準信号と同期した信号を生成するローカル・オシレータと、
(ii)該同期した信号と前記第1無線信号とを受領し、その和の信号と差の信号を複数生成するミキサと、
(iii)前記複数の和の信号と差の信号から適宜の信号を選択するフィルタと、
を有する
ことを特徴とする請求項11記載のハブ・ユニット。 - 前記ハブ・ユニットは、携帯電話基地局又は中継局と関連し、
前記第1無線信号は、ダウンリンク信号である
ことを特徴とする請求項11記載のハブ・ユニット。 - 前記1つの同期した「イーサネット」・ストリームのビットレートは、前記受領した「イーサネット」信号のビットレートよりも5%以上高い
ことを特徴とする請求項12記載のハブ・ユニット。 - 前記パケット同期化装置は、前記第1無線信号のレプリカを、デジタルの形式で、前記1つの同期した「イーサネット」・ストリームのフレーム内に入れる
ことを特徴とする請求項12記載のハブ・ユニット。 - 「イーサネット」ワイヤリングに関連する通信システムのリモート・ユニットであって、携帯電話のエンドユーザの装置に送信するために、ハブ・ユニットからダウンリンク信号を受領し、前記携帯電話のエンドユーザの装置から受領したアップリンク信号をハブ・ユニットに送るリモート・ユニットにおいて、
前記ハブ・ユニットとリモート・ユニットは、アップリンクとダウンリンクの無線周波数帯域の無線装置に関連し、
前記アップリンク信号は、無線アップリンク周波数帯域を介して最初は送信され、
前記リモート・ユニットは、
(a)前記ハブ・ユニットからの同期した「イーサネット」・ストリームを受領し、前記同期した「イーサネット」・ストリームのデータレートに関連する周波数の信号をデジタルフェーズロックループに与えるパケット・オープナと、
(b)前記同期した「イーサネット」・ストリームのデータレートに関連する周波数の信号を受領し、基準信号を抽出するデジタルフェーズロックループと、
(c)前記無線アップリンク周波数帯域を介して搬送されるアップリンク信号を、前記「イーサネット」ワイヤリング上を伝搬できるダウンコンバートされたアップリンク周波数帯域で搬送される信号に変換する周波数変換セクションと、
を有し、
それによって、前記ダウンコンバートされたアップリンク信号は、前記「イーサネット」ワイヤリングに送られ、
前記ハブ・ユニットに到達した時に、前記ダウンコンバートされたアップリンク信号は、前記ダウンコンバートされたアップリンク周波数帯域を介して搬送される信号から、前記アップリンクの周波数帯域を介して搬送される信号に、アップコンバートされ、無線装置に提供される
ことを特徴とする「イーサネット」ワイヤリング上の通信システムのリモート・ユニット。 - 前記ハブ・ユニットは、同期した「イーサネット」・ストリームを与え、前記リモート・ユニットは、更に、
(i)「イーサネット」・パケット・リビルダであって、
(A)前記パケット・オープナから、前記同期した「イーサネット」・ストリームのコンテンツを受領し、
(B)「イーサネット」の宛先に送信するために、前記コンテンツの少なくとも一部を有する非同期の「イーサネット」信号を生成する、
ための「イーサネット」・パケット・リビルダと、
(ii)パケット同期化装置であって、
(I)「イーサネット」ソースから非同期の「イーサネット」信号を受領し、
(II)前記非同期の「イーサネット」信号のコンテンツの少なくとも一部を有する同期した「イーサネット」・ストリームを生成する、
ためのパケット同期化装置と、
を含む
ことを特徴とする請求項16記載のリモート・ユニット。 - 前記パケット同期化装置は、
(I)他の装置にサービスするデータと、前記リモート・ユニットにある電子回路の状態と動作条件に対する指示と、前記ハブ・ユニットからリモート・ユニットへ送信される制御コマンドと、同期ソースからの同期化データとからなるデータアイテム群から選択されたデータアイテムを受領し、
(II)生成された同期した「イーサネット」・ストリーム内に、前記受領したデータアイテムを含める、
ように適合されている
ことを特徴とする請求項17記載のリモート・ユニット。
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US20110170476A1 (en) | 2011-07-14 |
EP2399141A4 (en) | 2012-08-01 |
WO2010089719A1 (en) | 2010-08-12 |
CN102232191A (zh) | 2011-11-02 |
US8897215B2 (en) | 2014-11-25 |
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JP2012517728A (ja) | 2012-08-02 |
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