JP5647195B2 - 多重入出力システムにおけるチャンネル品質情報フィードバック方法、データ伝送方法、ユーザ機器及び基地局 - Google Patents
多重入出力システムにおけるチャンネル品質情報フィードバック方法、データ伝送方法、ユーザ機器及び基地局 Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
- H04B7/0621—Feedback content
- H04B7/0632—Channel quality parameters, e.g. channel quality indicator [CQI]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
- H04B7/0417—Feedback systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
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Description
Claims (8)
- 多重入出力(MIMO)システムにおいて、ユーザ機器が基地局へチャンネル品質情報(CQI)をフィードバックする方法であって、
伝送可能なストリームの最大数を示すランク情報を複数のCQI副帯域を含むダウンリンク周波数全帯域にわたり、前記基地局に第1の伝送周期で伝送し、
前記ダウンリンク周波数全帯域のCQI副帯域にわたる第1のコードワードに対する第1のCQIインデックス値及び第2のコードワードに対する差分CQI値を前記基地局に第2の伝送周期で伝送し、前記差分CQI値は前記第1のCQIインデックス値から、前記CQI副帯域にわたる前記第2コードワードに対する第2のCQIインデックス値を引いたものを表しており、
前記第1の伝送周期は、前記第2の伝送周期より長く、
前記CQI副帯域にわたる前記対応するコードワードに対するチャネル品質が基準値以下である場合、前記第1のCQIインデックス値又は前記第2のCQIインデックス値は、コーディング率及び変調次数を示すためにそれぞれが定義された複数のCQIインデックス値の中から、対応するコードワードの伝送不可状態を示すために定義された特定のCQIインデックス値に設定される
ことを特徴とするチャンネル品質情報フィードバック方法。 - 前記特定のCQIインデックス値がCQIインデックス値「0」である、請求項1に記載のチャンネル品質情報フィードバック方法。
- 多重入出力(MIMO)システムにおいて、基地局におけるチャンネル品質情報(CQI)に基づいて、ユーザ機器へデータを伝送する方法であって、
伝送可能なストリームの最大数を示すランク情報を複数のCQI副帯域を含むダウンリンク周波数全帯域にわたり、前記ユーザ機器から第1の伝送周期で受信し、
前記ダウンリンク周波数全帯域のCQI副帯域にわたる第1のコードワードに対する第1のCQIインデックス値及び第2のコードワードに対する差分CQI値を前記ユーザ機器から第2の伝送周期で受信し、前記差分CQI値は前記第1のCQIインデックス値から、前記CQI副帯域にわたる前記第2コードワードに対する第2のCQIインデックス値を引いたものを表しており、
前記ランク情報、前記第1のCQIインデックス値及び前記差分CQI値に基づいて、前記ユーザ機器に対してランク及び少なくとも1つのコードワードを決定し、
前記第1の伝送周期は、前記第2の伝送周期より長く、
前記CQI副帯域にわたる前記対応するコードワードに対するチャネル品質が基準値以下である場合、前記第1のCQIインデックス値又は前記第2のCQIインデックス値は、コーディング率及び変調次数を示すためにそれぞれが定義された複数のCQIインデックス値の中から、対応するコードワードの伝送不可状態を示すために定義された特定のCQIインデックス値である
ことを特徴とするデータ伝送方法。 - 前記特定CQIインデックス値はCQIインデックス値「0」である、請求項3に記載のデータ伝送方法。
- 多重入出力(MIMO)システムにおいて、基地局へチャンネル品質情報(CQI)をフィードバックするユーザ機器であって、
複数のCQI副帯域を含むダウンリンク周波数全帯域にわたり、伝送可能なストリームの最大数を示すランク情報を決定し、前記ダウンリンク周波数全帯域のCQI副帯域にわたる第1のコードワードに対する第1のCQIインデックス値及び前記CQI副帯域にわたる第2のコードワードに対する第2のCQIインデックス値を決定するように構成された信号処理装置と、
前記ランク情報を前記基地局に第1の伝送周期で伝送し、前記第1のCQIインデックス値及び前記第2のコードワードに対する、前記第1のCQIインデックス値から前記第2のCQIインデックス値を引いたものを表す差分CQI値を前記基地局に第2の伝送周期で伝送するように構成された1つ以上のアンテナと、
を有し、
前記第1の伝送周期は、前記第2の伝送周期より長く、
前記CQI副帯域にわたる前記対応するコードワードに対するチャネル品質が基準値以下である場合、前記信号処理装置は、コーディング率及び変調次数を示すためにそれぞれが定義された複数のCQIインデックス値の中から、前記対応するコードワードの伝送不可状態を示すために定義された特定のCQIインデックス値に、前記第1のCQIインデックス値又は前記第2のCQIインデックス値のいずれかを設定するように構成される
ことを特徴とするユーザ機器。 - 前記特定のCQIインデックス値はCQIインデックス値「0」である、請求項5に記載のユーザ機器。
- 多重入出力(MIMO)システムにおいて、チャンネル品質情報(CQI)に基づいて、ユーザ機器へデータを伝送する基地局であって、
複数のCQI副帯域を含むダウンリンク周波数全帯域にわたり、伝送可能なストリームの最大数を示すランク情報を前記ユーザ機器から第1の伝送周期で受信し、前記ダウンリンク周波数全帯域のCQI副帯域にわたる第1のコードワードに対する第1のCQIインデックス値及び第2のコードワードに対する、前記第1のCQIインデックス値から前記CQI副帯域にわたる前記第2のコードワードに対する第2のCQIインデックス値を引いた値を表す差分CQI値を前記ユーザ機器から第2の伝送周期で受信するように構成された1つ以上のアンテナと、
前記ランク情報、前記第1のCQIインデックス値及び前記差分CQI値に基づいて、前記ユーザ機器に対してランク及び少なくとも1つのコードワードを決定するように構成された信号処理装置と、を有し、
前記第1の伝送周期は、前記第2の伝送周期より長く、
前記CQI副帯域にわたる前記対応するコードワードに対するチャネル品質が基準値以下である場合、前記第1のCQIインデックス値又は前記第2のCQIインデックス値は、コーディング率及び変調次数を示すためにそれぞれが定義された複数のインデックス値の中から、対応するコードワードの伝送不可状態を示すために定義された特定のCQIインデックス値である
ことを特徴とする基地局。 - 前記特定CQIインデックス値はCQIインデックス値「0」である、請求項7に記載の基地局。
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KR20080010672A KR101507785B1 (ko) | 2007-08-16 | 2008-02-01 | 다중 입출력 시스템에서, 채널품질정보를 송신하는 방법 |
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JP2012179423A Active JP5647195B2 (ja) | 2007-08-16 | 2012-08-13 | 多重入出力システムにおけるチャンネル品質情報フィードバック方法、データ伝送方法、ユーザ機器及び基地局 |
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EP2188912A4 (en) | 2010-07-28 |
CN102084602A (zh) | 2011-06-01 |
US9148210B2 (en) | 2015-09-29 |
US20150117563A1 (en) | 2015-04-30 |
US8964878B2 (en) | 2015-02-24 |
ES2386593T3 (es) | 2012-08-23 |
CN102084602B (zh) | 2014-02-19 |
EP2188912A2 (en) | 2010-05-26 |
KR101507785B1 (ko) | 2015-04-03 |
WO2009022873A3 (en) | 2009-04-16 |
JP5547635B2 (ja) | 2014-07-16 |
JP2010537471A (ja) | 2010-12-02 |
KR20090017963A (ko) | 2009-02-19 |
US20130121247A1 (en) | 2013-05-16 |
US20110080968A1 (en) | 2011-04-07 |
EP2475117A1 (en) | 2012-07-11 |
JP2013009400A (ja) | 2013-01-10 |
WO2009022873A2 (en) | 2009-02-19 |
EP2188912B1 (en) | 2012-05-30 |
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