JP2013517661A - 無線通信システムにおけるチャンネル状態情報基準信号(csi−rs)の処理方法 - Google Patents
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Abstract
Description
図面の全般にわたって同じ参照番号は同じ又は類似の構成要素、特徴、構造を説明するのに用いられている。
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Claims (17)
- 直交分割多重接続(OFDMA)無線通信システムにおいてチャンネル状態情報基準信号(CSI−RS)を伝送する方法において、
サブフレームの物理資源ブロック(PRB)インデックスに応じて対応するCSI−RSパターンタイプを決定する過程と、
前記CSI−RSを伝送するサブフレームであれば、前記決定されたCSI−RSパターンタイプによって前記PRBの各第1乃至第NのOFDMシンボルにそれぞれ対応する第1乃至第NのアンテナポートのCSI−RSを割り当てる過程と、
前記第1乃至第NのアンテナポートのCSI−RSが割り当てられたPRBを含むサブフレームを端末に伝送する過程と、
を含み、
前記第1乃至第NのCSI−RSパターンタイプは、前記第1乃至第Nのアンテナポート別のCSI−RSがPRBの第1乃至第NのOFDMシンボルに互いに異なるように交差されて割り当てられることを特徴とする方法。 - CSI−RSパターンタイプを決定する過程が、
PRBインデックスがiである場合に、(imodN)番目のCSI−RSパターンタイプを決定し、ここで、Nは、CSI−RSパターンタイプの数であることを特徴とする請求項1に記載の方法。 - N=2であれば、毎奇数番目のPRBにおいて第1のCSI−RSパターンタイプを伝送し、毎偶数番目のPRBにおいて第2のCSI−RSパターンタイプを伝送し、
前記第1のCSI−RSパターンタイプは、第1のOFDMシンボルにおいて第1のアンテナポートに対するCSI−RSを伝送し、第2のOFDMシンボルにおいて第2のアンテナポートに対するCSI−RSを伝送し、前記第2のCSI−RSパターンタイプは、第1のOFDMシンボルにおいて第2のアンテナポートに対するCSI−RSを伝送し、第2のOFDMシンボルにおいて第1のアンテナポートに対するCSI−RSを伝送することを特徴とする請求項2に記載の前記CSI−RS伝送方法。 - N=2であれば、k/2番目のPRBにおいて第1のCSI−RSパターンタイプを伝送し、k/2−K番目のPRBにおいて第2のCSI−RSパターンタイプを伝送し、
前記第1のCSI−RSパターンタイプは、第1のOFDMシンボルにおいて第1のアンテナポートに対するCSI−RSを伝送し、第2のOFDMシンボルにおいて第2のアンテナポートに対するCSI−RSを伝送し、前記第2のCSI−RSパターンタイプは、第1のOFDMシンボルにおいて第2のアンテナポートに対するCSI−RSを伝送し、第2のOFDMシンボルにおいて第1のアンテナポートに対するCSI−RSを伝送することを特徴とする請求項3に記載の前記CSI−RS伝送方法。 - COMPセットに含まれているセルを判断し、COMPCSI−RS伝送に関する制御情報を共有する過程と、
サブフレームの伝送時にCSI−RSを伝送するサブフレームであるか否かを判断する過程と、
CSI−RSを伝送するサブフレームであれば、COMP用のCSI−RSを伝送するサブフレームであるか否かを決定し、COMP用のCSI−RSを伝送するサブフレームであれば、前記COMP用のCSI−RSを伝送し、そうでなければ、Non−COMP用のCSI−RSを伝送する過程と、
を含み、
前記CoMP用のCSI−RSは、端末において複数セルのダウンリンクチャンネルを測定できるように複数のセルがUEに伝送するCSI−RSであり、前記COMPセットは、COMP用のCSI−RSを伝送するために協力する複数のセル集合を意味することを特徴とする前記方法。 - 前記共有される情報は、Comp用のCSI−RSのCSI−RSパターン、アンテナポートの位置などを含むことを特徴とする請求項8に記載の方法。
- 前記CoMPCSI−RSを伝送する過程が、
第1の時間周期のサブフレームにおいてCSI−RSを伝送し、前記伝送されるCSI−RSは、第2の時間周期のサブフレームにおいてComp用のCSI−RSを伝送し、残りの第1の時間周期のサブフレームにおいてNon−Comp用のCSI−RSを伝送し、
前記第2の時間は、前記第1の時間の整数倍の大きさを有することを特徴とする請求項9に記載の方法。 - 前記CoMPCSI−RSは、non−CoMPCSI−RSよりも少ない数のバーチャルアンテナポートを使用し、前記第1の時間は、5本のサブフレームの伝送時間間隔であることを特徴とする請求項10に記載の方法。
- 前記CoMPCSI−RSを伝送する過程が、
第1の時間周期のサブフレームにおいてNon−Comp用のCSI−RSを伝送し、第2の時間周期のサブフレームにおいてComp用のCSI−RSを伝送する過程と、
前記第2の時間は、前記第1の時間の整数倍の大きさを有し、Non−Comp用のCSI−RS及びComp用のCSI−RSを伝送するサブフレームは互いに重ならないことを特徴とする請求項9に記載の方法。 - 前記CoMPCSI−RSは、Non−CoMPよりも少ない数のバーチャルアンテナポートを使用し、前記第1の時間は、5本のサブフレームの伝送時間間隔であることを特徴とする請求項11に記載の方法。
- 直交分割多重接続無線通信システムにおいてCSI−RSを伝送する方法において、
隣り合うセルに対するCSI−RSパターンとCSI−RSアンテナポート数情報を共有し、サブフレームデータの伝送時に前記CSI−RSパターンを分析してCSI−RSを伝送するサブフレームであるか否かを決定する過程と、
前記CSI−RSの伝送時点であれば、CSI−RSパターンに応じてCSI−RSを含むサブフレームデータを伝送する過程と、
隣り合うセルのCSI−RSの伝送時点であれば、隣り合うセルのCSI−RSパターンのCSI−RSアンテナポート数に対応する数に見合う分のリソースエレメント(RE)をミュートしたサブフレームデータを伝送する過程と、
を含むことを特徴とする方法。 - 隣り合うセルは、互いに異なるCSI−RSパターンにて割り当てられることを特徴とする請求項13に記載の方法。
- 前記隣り合うセルは、互いに異なるサブフレームオフセットにてCSI−RSを伝送することを特徴とする請求項14に記載の方法。
- 前記隣り合うセルは、同じサブフレームにおいてCSI−RSを伝送することを特徴とする請求項14に記載の方法。
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Cited By (10)
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JP2013034110A (ja) * | 2011-08-02 | 2013-02-14 | Sharp Corp | 基地局、端末、通信システムおよび通信方法 |
JP2013517642A (ja) * | 2010-01-12 | 2013-05-16 | テレフオンアクチーボラゲット エル エム エリクソン(パブル) | Mimoシステムにおけるチャネル推定及び検出のための方法及び装置 |
JP2015512577A (ja) * | 2012-03-23 | 2015-04-27 | テレフオンアクチーボラゲット エル エム エリクソン(パブル) | 帯域幅適応参照信号 |
US9161236B2 (en) | 2010-03-29 | 2015-10-13 | Lg Electronics Inc. | Method and apparatus for measurement for inter-cell interference coordination in radio communication system |
JP2016500995A (ja) * | 2012-11-07 | 2016-01-14 | アルカテル−ルーセント | CoMP送信のための方法 |
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KR101831637B1 (ko) | 2018-02-23 |
CN104993911A (zh) | 2015-10-21 |
US10122497B2 (en) | 2018-11-06 |
US20180048428A1 (en) | 2018-02-15 |
CN102792621B (zh) | 2015-08-12 |
US9800373B2 (en) | 2017-10-24 |
KR20110083445A (ko) | 2011-07-20 |
US20140126668A1 (en) | 2014-05-08 |
EP2985931A1 (en) | 2016-02-17 |
CN104993911B (zh) | 2019-03-26 |
KR101754970B1 (ko) | 2017-07-06 |
CN102792621A (zh) | 2012-11-21 |
US9077519B2 (en) | 2015-07-07 |
JP2015164326A (ja) | 2015-09-10 |
US20150124758A1 (en) | 2015-05-07 |
KR20170081618A (ko) | 2017-07-12 |
EP2524455B1 (en) | 2016-10-05 |
JP5730905B2 (ja) | 2015-06-10 |
WO2011087252A2 (en) | 2011-07-21 |
JP5985696B2 (ja) | 2016-09-06 |
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