JP4286787B2 - Ofdma基盤セルラーシステムの下向リンクのための信号構成方法及び装置 - Google Patents
Ofdma基盤セルラーシステムの下向リンクのための信号構成方法及び装置 Download PDFInfo
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- H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
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- H04L5/02—Channels characterised by the type of signal
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- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0202—Channel estimation
- H04L25/0204—Channel estimation of multiple channels
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
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- H04L5/0014—Three-dimensional division
- H04L5/0023—Time-frequency-space
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- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0044—Allocation of payload; Allocation of data channels, e.g. PDSCH or PUSCH
- H04L5/0046—Determination of the number of bits transmitted on different sub-channels
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Description
その後、使用者のチャネル情報(例えば、チャネル状況)、トラフィック要求量及び移動速度を考慮して伝送方式及び追加アンテナ数を決める(S220)。
(2)トラフィックチャネルシンボルを最大個数生成した後、追加パイロットシンボルを伝送する位置を穴明き状態にする方法。
(3)追加パイロットシンボルのうちの一部の個数を予め考慮してトラフィックチャネルシンボルを生成した後、その他の追加パイロットシンボルを伝送する位置を穴明き状態にする方法。
図8は、本発明の一実施例によって、1個の基本アンテナと1個の追加アンテナを使用する高速移動使用者に割当てられた副搬送波帯域にパイロットシンボルを配置する例を示している。
簡略に言えば、トラフィックチャネルのアンテナ数に関連して、4種類のパイロットシンボル配置がある。
(1)低速移動で基本アンテナのみを使用−追加パイロットシンボル不必要。
(2)低速移動で追加アンテナを使用―――追加アンテナ用パイロットシンボル配置。
(3)高速移動で基本アンテナのみを使用−基本アンテナ用パイロットシンボルを追加挿入して高速環境に合わせる。
(4)高速移動で追加アンテナを使用―――基本及び追加アンテナ用パイロットシンボルを追加挿入して移動速度に合わせる。
図10は本発明の実施例によるOFDMA基盤セルラーシステムの下向リンク信号構成装置100を示す図面である。
Claims (10)
- 直交周波数分割多重接続方法を使用するセルラーシステムの下向リンクのための信号構成方法において、
(a)共通チャネルと制御チャネルのデータに符号化、インターリービング、シンボルマッピングを行い、前記共通チャネルと制御チャネルの復調に必要な基本パイロットシンボルを時間、周波数、アンテナに配置する段階と、
(b)各使用者のトラフィックチャネルで伝送するべきデータを受信し、この使用者の移動速度、チャネル情報、トラフィック要求量に応じて各使用者の伝送方式を決める段階と、
(c)使用者別の伝送方式及び移動速度に応じて前記トラフィックチャネルを復調するために追加的に必要な追加パイロットシンボルを決める段階と、
(d)使用者別伝送方式に応じて前記トラフィックチャネルのデータに符号化、インターリービング、シンボルマッピングを行い、マッピングされたシンボルと前記追加パイロットシンボルを時間、周波数、アンテナに配置する段階とを含み、
前記段階(c)で追加パイロットシンボルを決める場合、前記トラフィックチャネルの前記伝送方式が基本アンテナのみを使用し、移動局の移動速度が既に決められた基準以下であれば追加パイロットシンボルを使用せず、前記トラフィックチャネルの前記伝送方式が追加アンテナを使用し、移動局の移動速度が既に決められた基準以下であれば、追加アンテナ用パイロットシンボルを使用することを特徴とする下向リンク信号構成方法。 - 第1使用者グループが使用する副搬送波に対するパイロットシンボルの配置と、第2使用者グループが使用する副搬送波に対するパイロットシンボルの配置が異なることを特徴とする、請求項1に記載の下向リンク信号構成方法。
- 前記第1使用者グループが使用する前記副搬送波に対するパイロットシンボルの配置が、前記第2使用者グループが使用する前記副搬送波の配置より稠密であることを特徴とする、請求項2に記載の下向リンク信号構成方法。
- 前記第1使用者グループは前記第2使用者グループより高速の使用者グループであり、全副搬送波のうちの幾つかを前記第1使用者グループのために予め割り当てることを特徴とする、請求項3に記載の下向リンク信号構成方法。
- 前記段階(c)で追加パイロットシンボルを決める方法は、
前記トラフィックチャネルの前記伝送方式が基本アンテナのみを使用し、前記移動局の前記移動速度が基準値以上であれば、基本アンテナ用パイロットシンボルを前記移動局の前記移動速度を考慮して追加挿入し、
前記トラフィックチャネルの前記伝送方式が追加アンテナを使用し、前記移動局の前記移動速度が既に決められた基準以上であれば、基本及び追加アンテナ用パイロットシンボルを前記移動局の前記移動速度を考慮して追加挿入することを特徴とする、請求項1に記載の下向リンク信号構成方法。 - 前記段階(d)で追加パイロットシンボルを配置する方法は、前記追加パイロット個数を予め考慮してトラフィックチャネルシンボルを生成することを特徴とする、請求項1に記載の下向リンク信号構成方法。
- 前記段階(d)で追加パイロットシンボルを配置する方法は、最大トラフィックチャネルシンボル数に合せてシンボルを生成した後、前記追加パイロットシンボルを伝送する位置に穴明き状態にすることを特徴とする、請求項1に記載の下向リンク信号構成方法。
- 前記段階(d)で追加パイロットシンボルを配置する方法は、
追加パイロット個数のうちの一部を予め考慮してトラフィックチャネルシンボルを生成した後、その他に追加パイロットシンボルを伝送する位置で穴明き状態にすることを特徴とする、請求項1に記載の下向リンク信号構成方法。 - 直交周波数分割多重接続方法を使用するセルラーシステムの下向リンク信号構成装置において、
各使用者のトラフィックチャネル情報を貯蔵する第1貯蔵器と、
各使用者のチャネル情報、トラフィック要求量、移動速度情報を貯蔵する第2貯蔵器と、
前記第2貯蔵器に貯蔵された情報を利用して既に決められた方法に従って伝送使用者と伝送方式を決める伝送使用者及び伝送方式の決定器と、
前記伝送使用者及び伝送方式の決定器で決められた伝送方式に従って前記第1貯蔵器に貯蔵されたトラフィックチャネル情報を読取り、読取られたトラフィックチャネルに符号化、インターリービング、シンボルマッピングを行うトラフィックチャネル処理器と、
前記伝送使用者及び伝送方式の決定器で決められた伝送方式と前記第2貯蔵器に貯蔵された移動速度情報を用いてトラフィックチャネルを復調するために必要な追加パイロットシンボルを発生する追加パイロットシンボル発生器と、
前記トラフィックチャネル処理器から出力されたトラフィックチャネルシンボルと、前記追加パイロットシンボル発生器から出力された追加パイロットシンボルにチャネル別/使用者別にチャネル利得を掛け、既に決められた方法通りに時間、副搬送波、アンテナにマッピングする時間/副搬送波/アンテナマッピング器と、
共通/制御チャネル情報を受信し、受信した共通/制御チャネル情報に符号化、インターリービング、シンボルマッピングを行う共通/制御チャネル処理器と、
共通/制御チャネルを復調するために必要な基本パイロットシンボルを発生する基本パイロットシンボル発生器と
を含み、
前記追加パイロットシンボル発生器で追加パイロットシンボルを発生する場合、前記トラフィックチャネルの前記伝送方式が基本アンテナのみを使用し、移動局の移動速度が既に決められた基準以下であれば追加パイロットシンボルを使用せず、前記トラフィックチャネルの前記伝送方式が追加アンテナを使用し、移動局の移動速度が既に決められた基準以下であれば、追加アンテナ用パイロットシンボルを使用し、前記移動局の前記移動速度が基準値以上であれば、基本アンテナ用パイロットシンボルを前記移動局の前記移動速度を考慮して追加挿入し、前記トラフィックチャネルの前記伝送方式が追加アンテナを使用し、前記移動局の前記移動速度が既に決められた基準以上であれば、基本及び追加アンテナ用パイロットシンボルを前記移動局の前記移動速度を考慮して追加挿入することを特徴とする下向リンク信号構成装置。 - 前記追加パイロットシンボル発生器で追加パイロットシンボルを発生する場合、前記トラフィックチャネルの前記伝送方式が基本アンテナのみを使用し、前記移動局の前記移動速度が基準値以上であれば、基本アンテナ用パイロットシンボルを前記移動局の前記移動速度を考慮して追加挿入し、
前記トラフィックチャネルの前記伝送方式が追加アンテナを使用し、前記移動局の前記移動速度が既に決められた基準以上であれば、基本及び追加アンテナ用パイロットシンボルを前記移動局の前記移動速度を考慮して追加挿入することを特徴とする、請求項9に記載の下向リンク信号構成装置。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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KR10-2002-0079598A KR100507519B1 (ko) | 2002-12-13 | 2002-12-13 | Ofdma 기반 셀룰러 시스템의 하향링크를 위한 신호구성 방법 및 장치 |
PCT/KR2003/001083 WO2004056022A2 (en) | 2002-12-13 | 2003-06-02 | Apparatus and method for signal constitution for downlink of ofdma-based cellular system |
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JP4286787B2 true JP4286787B2 (ja) | 2009-07-01 |
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EP (1) | EP1570588B1 (ja) |
JP (1) | JP4286787B2 (ja) |
KR (1) | KR100507519B1 (ja) |
AT (1) | ATE411656T1 (ja) |
AU (1) | AU2003241190A1 (ja) |
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US7460466B2 (en) | 2008-12-02 |
KR100507519B1 (ko) | 2005-08-17 |
EP1570588B1 (en) | 2008-10-15 |
EP1570588A2 (en) | 2005-09-07 |
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