JP6100878B2 - 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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Description
Claims (19)
- 協調マルチポイント構成(CoMP構成)内のユーザ設備(UE)の受信機タイミングを調整する方法であって、
前記UEにおいて前記CoMP構成の協調セット内の複数のノードから複数のノード固有基準信号(複数のノード固有RS)を受信することであって、前記協調セットは、少なくとも2つのノードを有する、受信することと、
前記少なくとも2つのノードについてアンテナポートによって受信した複数のノード固有RSタイミングを生成することと、
受信した前記複数のノード固有RSタイミングから、送信機遅延(TX遅延)、伝搬遅延、受信機遅延(RX遅延)または他の処理遅延の1または複数を含む複合タイミング遅延を推定することと、
前記複合タイミング遅延に少なくとも一部基づいて前記UEの前記受信機タイミングを調整することと
を含む方法。 - 複数の協調ノードから前記複数のノード固有RSを受信することは、ダウンリンク送信に対応付けられている、チャネル状態情報基準信号(CSI−RS)アンテナポートを利用し、前記ダウンリンク送信は、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1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)を含む、請求項1または2に記載の方法。
- 調整される前記受信機タイミングは、前記UE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から3のいずれか一項に記載の方法。
- 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)、またはチャネル状態情報基準信号(CSI−RS)を含む、請求項1または2に記載の方法。
- 前記複数のノードは複数の協調ノードである、請求項1から5のいずれか一項に記載の方法。
- 請求項1から6のいずれか一項に記載の方法をコンピュータに実行させるプログラム。
- 請求項7に記載の前記プログラムを記録するコンピュータ可読記録媒体。
- 協調マルチポイント構成(CoMP構成)内のユーザ設備(UE)の受信機タイミングを推定するタイミング推定デバイスであって、
ダウンリンク受信機と、
タイミング推定器と
を備え、
前記ダウンリンク受信機は、前記UEにおいて前記CoMP構成の協調セット内の複数の協調ノードから複数のノード固有基準信号(複数のノード固有RS)を受信し、ダウンリンク送信に対応付けられている、チャネル状態情報基準信号(CSI−RS)アンテナポートを利用し、前記協調セットは、少なくとも2つの協調ノードを有し、前記ダウンリンク送信は、データまたは物理ダウンリンク共有チャネル(PDSCH)を含み、
前記タイミング推定器は、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つの協調ノードからのタイミングを表し、
前記複合受信RSタイミングは、送信機遅延(TX遅延)、伝搬遅延、受信機遅延(RX遅延)または他の処理遅延の1または複数を含む複合タイミング遅延を表す、
タイミング推定デバイス。 - 前記複合受信RSタイミングは、前記少なくとも2つの協調ノードについてのアンテナポートによって受信したRSの前記複合タイミング遅延を表す、請求項9に記載のタイミング推定デバイス。
- 前記ダウンリンク受信機は、CoMP構成用の送信モードを利用する、請求項9または10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9から11のいずれか一項に記載のタイミング推定デバイス。
- 調整される前記受信機タイミングは、前記UE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12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9から12のいずれか一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9から12のいずれか一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調ノードへ送信するアップリンク送信機をさらに有する、請求項9から17のいずれか一項に記載のタイミング推定デバイス。
- 前記UEは、前記タイミング推定デバイスを含み、前記UE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)、または無線ワイドエリアネットワーク(WWAN)に接続され、前記UE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、または、不揮発性メモリポートを含む、請求項9から18のいずれか一項に記載のタイミング推定デバイス。
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