JP2014533036A - 協調マルチポイント(CoMP)システムにおけるダウンリンク(DL)送信のためのタイミング同期 - Google Patents
協調マルチポイント(CoMP)システムにおけるダウンリンク(DL)送信のためのタイミング同期 Download PDFInfo
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Abstract
Description
Claims (30)
- 協調マルチポイント(CoMP)システム内の無線デバイスの受信機タイミングの調整方法であって、前記方法は、
無線デバイスにおいて前記CoMPシステムの協調セット内の複数の協働ノードからの複数のノード固有基準信号(RS)を受信することと、
前記複数のノード固有RSから生成された複数の受信RSタイミングから複合受信RSタイミングを推定することと、
前記複合受信RSタイミングに少なくとも一部に基づいて前記受信機タイミングを調整することと、
を備え、
前記協調セットは、少なくとも2つの協働ノードを有し、
前記複数の受信RSタイミングは、前記少なくとも2つの協働ノードからのタイミングを表す、方法。 - 前記ノード固有RSは、チャネル状態情報基準信号(CSI−RS)を有する、請求項1に記載の方法。
- 前記調整される受信機タイミングは、前記無線デバイスの受信機が受信信号のための高速フーリエ変換(FFT)を処理する時間である、請求項1または2に記載の方法。
- 前記複合受信RSタイミングを推定することは、最も早い受信RSタイミングを前記複合受信RSタイミングに選択することをさらに有する、請求項1から3のいずれか1項に記載の方法。
- 前記複合受信RSタイミングを推定することは、実質的に最小受信RSタイミングと最大受信RSタイミングとの間の受信機RSタイミングを選択することをさらに有する、請求項1から3のいずれか1項に記載の方法。
- 前記複合受信RSタイミングは、前記複数の協働ノードのための基準信号受信電力(RSRP)と、前記複数の協働ノードの前記複数のノード固有RSから生成された前記受信RSタイミングとの組み合わせによって求められる、請求項6に記載の方法。
- 前記無線デバイスから協働ノードへ、前記複合受信RSタイミング、または前記協働ノードからの前記複数のノード固有RSから生成された協働ノード受信RSタイミング、を含むタイミングフィードバックを送信すること、
をさらに有する、請求項1から8のいずれか1項に記載の方法。 - 前記ノード固有RSは、プライマリ同期信号(PSS)、セカンダリ同期信号(SSS)、セル固有基準信号(CRS)、およびチャネル状態情報基準信号(CSI−RS)、ならびにこれらの組み合わせからなる群から選択される、請求項1から9のいずれか1項に記載の方法。
- コンピュータに請求項1から10のいずれか1項に記載の方法を実行させるプログラム。
- 協調マルチポイント(CoMP)システム内の無線デバイスの受信機タイミングを推定するためのタイミング推定デバイスであって、前記タイミング推定デバイスは、
無線デバイスにおいて前記CoMPシステムの協調セット内の複数の協働ノードからの複数のノード固有基準信号(RS)を受信するダウンリンク受信モジュールと、
前記複数のノード固有RSから生成された複数の受信RSタイミングから複合受信RSタイミングを推定するタイミング推定器と、
を備え、
前記協調セットは、少なくとも2つの協働ノードを有し、
前記複数の受信RSタイミングは、前記少なくとも2つの協働ノードからのタイミングを表す、タイミング推定デバイス。 - 前記ノード固有RSは、チャネル状態情報基準信号(CSI−RS)を有する、請求項12に記載のタイミング推定デバイス。
- 前記複合受信RSタイミングに基づいて前記受信機タイミングを調整するタイミング調整モジュール、
をさらに備える、請求項12または13に記載のタイミング推定デバイス。 - 前記調整される受信機タイミングは、前記無線デバイスの受信機が受信信号のための高速フーリエ変換(FFT)を処理する時間である、請求項14に記載のタイミング推定デバイス。
- 前記タイミング推定器は、最も早い受信RSタイミングを前記複合受信RSタイミングに選択する、請求項12から15のいずれか1項に記載のタイミング推定デバイス。
- 前記タイミング推定器は、実質的に最小受信RSタイミングと最大受信RSタイミングとの間の受信機RSタイミングを選択する、請求項12から15のいずれか1項に記載のタイミング推定デバイス。
- 前記複合受信RSタイミングを含むタイミングフィードバックを協働ノードへ送信するアップリンク送信モジュール、
をさらに備える、請求項12から19のいずれか1項に記載のタイミング推定デバイス。 - 前記無線デバイスは、前記タイミング推定デバイスを含み、前記無線デバイスは、ユーザ設備(UE)および移動局(MS)からなる群から選択され、前記無線デバイスは、無線ローカルエリアネットワーク(WLAN)、無線パーソナルエリアネットワーク(WPAN)、および無線ワイドエリアネットワーク(WWAN)のうちの少なくとも1つに接続され、前記無線デバイスは、アンテナ、タッチセンシティブディスプレイ画面、スピーカ、マイクロホン、グラフィックスプロセッサ、アプリケーションプロセッサ、内部メモリ、不揮発性メモリポート、またはこれらの組み合わせを含む、請求項12から20のいずれか1項に記載のタイミング推定デバイス。
- 第1協働ノードのダウンリンク(DL)送信のタイミングを協調マルチポイント(CoMP)システム内の第2協働ノードのダウンリンク送信に対して同期させる方法であって、前記方法は、
前記第1協働ノードにおいて無線デバイスからタイミングフィードバックを受信することと、
前記タイミングフィードバックを用いた調整タイミングによって前記第1協働ノードにおけるダウンリンク送信タイミングを変更することと、
を備え、
前記タイミングフィードバックは、少なくとも1つの協働ノードのノード固有RSから生成された少なくとも1つの受信基準信号(RS)タイミングを含む、方法。 - 前記タイミングフィードバックは、複合受信RSタイミングまたは前記第1協働ノード受信RSタイミングを有し、前記複合受信RSタイミングは、少なくとも2つの協働ノードからのタイミングを表す複数の受信RSタイミング、または前記第1協働ノードからの複数のノード固有RSから生成される第1協働ノード受信RSタイミングから推定され、前記複数の受信RSタイミングは前記複数のノード固有RSから生成される、請求項22に記載の方法。
- 前記ノード固有RSは、チャネル状態情報基準信号(CSI−RS)を含み、前記ダウンリンク送信がデータまたは物理ダウンリンク共有チャネル(PDSCH)を含む、請求項22または23に記載の方法。
- 前記ダウンリンク送信タイミングを変更することは、
前記複合受信RSタイミングまたは前記第1協働ノード受信RSタイミングによって、前記ダウンリンク送信に用いられるダウンリンク信号の逆高速フーリエ変換(IFFT)タイミングをシフトさせること、
をさらに有する、請求項22から24のいずれか1項に記載の方法。 - 前記タイミングフィードバックを受信する前に、
前記第1協働ノードにおいて複数の協働ノードから選択協働ノードを選択することと、
前記選択協働ノードの選択を前記無線デバイスへ送信することと、
前記第1協働ノードからのノード固有RSを前記無線デバイスへ送信することと、
をさらに備え、
前記選択協働ノードからのノード固有RSが前記無線デバイスによって同期RSタイミングを生成するために用いられ、前記同期RSタイミングは受信データまたは受信物理ダウンリンク共有チャネル(PDSCH)のためのタイミング同期に用いられ、
前記同期RSタイミングが、前記無線デバイスの受信機タイミングを受信データまたは前記受信PDSCHのために調整する目的で用いられる、請求項22から24のいずれか1項に記載の方法。 - コンピュータに請求項22から26のいずれか1項に記載の方法を実行させるプログラム。
- 第1協働ノードのダウンリンク(DL)送信のタイミングを協調マルチポイント(CoMP)システム内の第2協働ノードのダウンリンク送信に対して同期させるためのタイミング同期デバイスであって、前記タイミング同期デバイスは、
無線デバイスからタイミングフィードバックを受信するアップリンク受信モジュールと、
前記タイミングフィードバックを用いた調整タイミングによってダウンリンク送信タイミングを変更するタイミング変更モジュールと、
を備え、
前記タイミングフィードバックは、少なくとも1つの協働ノードのノード固有RSから生成された少なくとも1つの受信基準信号(RS)タイミングを有する、タイミング同期デバイス。 - 前記ノード固有RSは、チャネル状態情報基準信号(CSI−RS)を含み、前記タイミングフィードバックは、複合受信基準信号(RS)タイミングまたは前記第1協働ノード受信RSタイミングを含み、前記複合受信RSタイミングは、少なくとも2つの協働ノードからのタイミングを表す複数の受信RSタイミングから推定され、前記第1協働ノード受信RSタイミングは、前記第1協働ノードからの前記複数のノード固有RSから生成され、前記複数の受信RSタイミングは、前記複数のノード固有RSから生成される、請求項28に記載のタイミング同期デバイス。
- ノード固有RSを前記無線デバイスへ送信するダウンリンク送信モジュールをさらに含み、
前記タイミング変更モジュールが、前記タイミングフィードバックを用いた前記調整タイミングによって、前記ダウンリンク送信に用いられるダウンリンク信号の高速逆フーリエ変換(IFFT)タイミングをシフトさせる、
請求項28または29に記載のタイミング同期デバイス。
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EP2774298A4 (en) | 2015-08-26 |
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BR112014010783A2 (pt) | 2017-06-13 |
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CN104081696B (zh) | 2017-07-18 |
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US11336423B2 (en) | 2022-05-17 |
KR20160018882A (ko) | 2016-02-17 |
RU2565245C1 (ru) | 2015-10-20 |
US10560247B2 (en) | 2020-02-11 |
CN104081696A (zh) | 2014-10-01 |
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KR20140095065A (ko) | 2014-07-31 |
EP2774298B1 (en) | 2021-04-28 |
US10044546B2 (en) | 2018-08-07 |
EP2774298A1 (en) | 2014-09-10 |
KR101947246B1 (ko) | 2019-04-03 |
US20180343157A1 (en) | 2018-11-29 |
KR101620248B1 (ko) | 2016-05-12 |
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