JP5607143B2 - 通信方法、通信装置、携帯通信端末、チップセット、および、通信システム - Google Patents
通信方法、通信装置、携帯通信端末、チップセット、および、通信システム Download PDFInfo
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- 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
- 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
- H04B7/0617—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 for beam forming
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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
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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
- H04B7/06—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
- H04B7/0636—Feedback format
- H04B7/0639—Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection
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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
- H04B7/0686—Hybrid systems, i.e. switching and simultaneous transmission
- H04B7/0695—Hybrid systems, i.e. switching and simultaneous transmission using beam selection
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Description
本出願は、2009年4月21日出願の米国仮出願61/171,328号明細書の優先権を主張するものであり、前記出願の内容は、参照により本明細書に組み込まれる。
で示されるウェイトベクトルによって表される。i番目のビームを生成する複数のeNodeBからなるクラスタをBiと記す場合、このクラスタのk番目のeNodeBにおけるアンテナの数はNkと表され、ベクトル
は、
個の要素を有する。
の要素はそれぞれ、各アンテナ36を介して送信される信号に適用される倍数的な重み(ウェイト)(典型的には、大きさと位相を有する複素数である)を表している。ある実施形態では、所与のクラスタにおけるウェイトベクトルは、互いに直交する。すなわち、Bi=Bj(i≠j)であれば、
である。
と表される。第2eNodeBは、L2個のTTI期間を有する周期的なビーム設定のパターンを適用する。このパターンにおけるウェイトベクトルは、
と表される。図3に示すグラフ104は、第1eNodeBによって送信されるビーム設定の第1パターンを示し、グラフ108は、第2eNodeBによって送信されるビーム設定の第2パターンを示す。
の組は、周期的な間隔で、再び発生する。したがって、一実施形態において、所定のUEは、特定のウェイトベクトルの特定の発生において、好適に信号品質を測定しフィードバックをeNodeBに報告する。eNodeBは、このウェイトベクトルの組について行った決定(例えば、スケジューリング又は減衰ビームについて)を、このウェイトベクトルの組がこの先に発生した場合に適用する。しかしながら、典型的には、フィードバックは、チャネル応答が大きく変化するまでの限られた期間でのみ、有効である。別の実施形態では、UEは、(k−L1)番目及び(k−L2)番目のTTIで測定された信号(及びその他の過去の測定)に基づいて、k番目のTTIにおける通信状態を推定することができる。
Claims (24)
- 2以上の送信機を含むグループから、時間的及び空間的に変化し少なくとも第1送信ビーム及び第2送信ビームを含む複数の無線周波数(RF)送信ビームを、受信機で受信する段階と、
前記第1送信ビームが前記第2送信ビームの受信と干渉を引き起こしていることを特定する段階と、
1以上の送信機が、前記第2送信ビームの送信の間に前記第1送信ビームを減衰するように、前記受信機から前記1以上の送信機へとフィードバックを送信する段階と
を備え、
前記第1送信ビームは、周期的に設定された重み付け関数を用いて減衰され、
現在の前記重み付け関数を用いて、前記第1送信ビームと前記第2送信ビームとの将来の干渉が予測される通信方法。 - 2以上の送信機を含むグループから、時間的及び空間的に変化し少なくとも第1送信ビーム及び第2送信ビームを含む複数の無線周波数(RF)送信ビームを、受信機で受信する段階と、
前記第1送信ビームが前記第2送信ビームの受信と干渉を引き起こしていることを特定する段階と、
1以上の送信機が、前記第2送信ビームの送信の間に前記第1送信ビームを減衰するように、前記受信機から前記1以上の送信機へとフィードバックを送信する段階と
を備え、
複数の基地局が、前記第1送信ビームと前記第2送信ビームとを介して同じデータを送信する通信方法。 - 前記第1送信ビーム及び前記第2送信ビームは、前記2つ以上の送信機の間で調整が行われたパターンに従って、時間的及び空間的に変化する請求項1または2に記載の通信方法。
- 前記第2送信ビームが、次に続く受信機への伝送を受信するのに好適であると特定された後に、前記第1送信ビームが干渉を引き起こしていると特定される請求項1から3のいずれか一項に記載の通信方法。
- 前記第2送信ビームが、次に続く受信機への伝送を受信するのに好適であると特定する段階を備え、
前記フィードバックを送信する段階は、前記第2送信ビームを介して、前記次に続く伝送を受信する要求を送信する段階を含む請求項1から3のいずれか一項に記載の通信方法。 - 前記第1送信ビームが前記干渉を引き起こしていることを特定する段階は、受信された前記複数の送信ビームの少なくとも一部における信号品質を測定する段階、及び、前記測定された信号品質に応答して前記干渉を検出する段階を含む請求項1から3のいずれか一項に記載の通信方法。
- 前記信号品質を測定する段階は、受信された前記複数の送信ビームの少なくとも一部におけるパイロット信号を受信する段階、及び、前記パイロット信号における信号品質を測定する段階を含む請求項6に記載の通信方法。
- 前記第1送信ビームが前記干渉を引き起こしていることを特定する段階は、前記第1送信ビーム及び前記第2送信ビームの将来の発生における干渉を予測する段階を含み、
前記フィードバックを送信する段階は、前記将来の発生時に、前記1以上の送信機に前記第1送信ビームを減衰させることを含む請求項1から3のいずれか一項に記載の通信方法。 - 前記第2送信ビームを介して信号を受信するのに望ましい期間を選択する段階を備え、
前記フィードバックを送信する段階は、前記望ましい期間に、前記1以上の送信機に前記第1送信ビームを減衰させる段階を含む請求項8に記載の通信方法。 - 前記複数の送信ビームを受信する段階は、ロングタームエボリューション(LTE)規格に準拠した信号を受信する段階を含む請求項1から3のいずれか一項に記載の通信方法。
- 前記複数の送信ビームを受信する段階は、前記送信機の2以上が合同で送信する少なくとも1つの送信ビームを受信する段階を含む請求項1から3のいずれか一項に記載の通信方法。
- 前記フィードバックを送信する段階は、前記送信機に、前記減衰された第1送信ビームを介して、少なくとも1つの別の受信機へとデータを送信させる段階を含む請求項1から3のいずれか一項に記載の通信方法。
- 2以上の送信機を含むグループから、時間的及び空間的に変化し少なくとも第1送信ビーム及び第2送信ビームを含む複数の無線周波数(RF)送信ビームを受信する受信機と、
前記第1送信ビームが前記第2送信ビームの受信と干渉を引き起こしていることを特定し、1以上の送信機が前記第2送信ビームの送信の間に前記第1送信ビームを減衰するように、前記1以上の送信機へとフィードバックを送信させるプロセッサと
を備え、
前記第1送信ビームは、周期的に設定された重み付け関数を用いて減衰され、
現在の前記重み付け関数を用いて、前記第1送信ビームと前記第2送信ビームとの将来の干渉を予測する通信装置。 - 2以上の送信機を含むグループから、時間的及び空間的に変化し少なくとも第1送信ビーム及び第2送信ビームを含む複数の無線周波数(RF)送信ビームを受信する受信機と、
前記第1送信ビームが前記第2送信ビームの受信と干渉を引き起こしていることを特定し、1以上の送信機が前記第2送信ビームの送信の間に前記第1送信ビームを減衰するように、前記1以上の送信機へとフィードバックを送信させるプロセッサと
を備え、
複数の基地局により、前記第1送信ビームと前記第2送信ビームとを介して同じデータが送信される通信装置。 - 前記プロセッサは、前記第2送信ビームが次に続く受信機への伝送を受信するのに好適であると特定し、前記第2送信ビームを介して前記次に続く伝送を受信する要求を前記2以上の送信機に送信する請求項13または14に記載の通信装置。
- 前記受信機は、受信された前記複数の送信ビームの少なくとも一部における信号品質を測定し、前記プロセッサは、前記測定された信号品質に応答して前記第1送信ビームが前記干渉を起こしていることを特定する請求項13または14に記載の通信装置。
- 前記プロセッサは、前記第1送信ビーム及び前記第2送信ビームの将来の発生における干渉を予測して、前記将来の発生時に、前記1以上の送信機に前記第1送信ビームを減衰させるべく、前記フィードバックを送信する請求項13から16のいずれか一項に記載の通信装置。
- 前記プロセッサは、前記1以上の送信機に、前記減衰された第1送信ビームを介して、少なくとも1つの別の受信機へとデータを送信させるべく、前記フィードバックを送信する請求項13から16のいずれか一項に記載の通信装置。
- 請求項13または14に記載の前記通信装置を備える携帯通信端末。
- 請求項13または14に記載の前記通信装置を備える、携帯通信端末における信号を処理するチップセット。
- 2つ以上の送信機から、時間的及び空間的に変化し少なくとも第1送信ビーム及び第2送信ビームを含む複数の送信ビームを、受信機へと送信する段階と、
前記第1送信ビームが前記第2送信ビームの受信と干渉を引き起こしていることを示すフィードバックを、前記2つ以上の送信機において前記受信機から受信する段階と、
前記フィードバックに応答して、前記第2送信ビームを送信する間に、前記第1送信ビームを減衰させる段階とを備え、
前記第1送信ビームは、周期的に設定された重み付け関数を用いて減衰され、
現在の前記重み付け関数を用いて、前記第1送信ビームと前記第2送信ビームとの将来の干渉が予測される通信方法。 - 2つ以上の送信機から、時間的及び空間的に変化し少なくとも第1送信ビーム及び第2送信ビームを含む複数の送信ビームを、受信機へと送信する段階と、
前記第1送信ビームが前記第2送信ビームの受信と干渉を引き起こしていることを示すフィードバックを、前記2つ以上の送信機において前記受信機から受信する段階と、
前記フィードバックに応答して、前記第2送信ビームを送信する間に、前記第1送信ビームを減衰させる段階とを備え、
複数の基地局が、前記第1送信ビームと前記第2送信ビームとを介して同じデータを送信する通信方法。 - 時間的及び空間的に変化し少なくとも第1送信ビーム及び第2送信ビームを含む複数の送信ビームを受信機へと送信し、前記第1送信ビームが前記第2送信ビームの受信と干渉を引き起こしていることを示すフィードバックを前記受信機から受信し、前記フィードバックに応答して、前記第2送信ビームを送信する間に、前記第1送信ビームを減衰させる、2つ以上の送信機を備え、
前記第1送信ビームは、周期的に設定された重み付け関数を用いて減衰され、
現在の前記重み付け関数を用いて、前記第1送信ビームと前記第2送信ビームとの将来の干渉が予測される通信システム。 - 時間的及び空間的に変化し少なくとも第1送信ビーム及び第2送信ビームを含む複数の送信ビームを受信機へと送信し、前記第1送信ビームが前記第2送信ビームの受信と干渉を引き起こしていることを示すフィードバックを前記受信機から受信し、前記フィードバックに応答して、前記第2送信ビームを送信する間に、前記第1送信ビームを減衰させる、2つ以上の送信機を備え、
複数の基地局が、前記第1送信ビームと前記第2送信ビームとを介して同じデータを送信する通信システム。
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US17132809P | 2009-04-21 | 2009-04-21 | |
US61/171,328 | 2009-04-21 | ||
PCT/IB2010/051088 WO2010122432A1 (en) | 2009-04-21 | 2010-03-14 | Multi-point opportunistic beamforming with selective beam attenuation |
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JP5607143B2 true JP5607143B2 (ja) | 2014-10-15 |
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US8385441B2 (en) | 2009-01-06 | 2013-02-26 | Marvell World Trade Ltd. | Efficient MIMO transmission schemes |
US8238483B2 (en) * | 2009-02-27 | 2012-08-07 | Marvell World Trade Ltd. | Signaling of dedicated reference signal (DRS) precoding granularity |
US8699528B2 (en) | 2009-02-27 | 2014-04-15 | Marvell World Trade Ltd. | Systems and methods for communication using dedicated reference signal (DRS) |
EP2417780B1 (en) * | 2009-04-06 | 2019-05-08 | Marvell World Trade Ltd. | Improved feedback strategies for multi-user mimo communication systems |
US8675794B1 (en) | 2009-10-13 | 2014-03-18 | Marvell International Ltd. | Efficient estimation of feedback for modulation and coding scheme (MCS) selection |
US8917796B1 (en) | 2009-10-19 | 2014-12-23 | Marvell International Ltd. | Transmission-mode-aware rate matching in MIMO signal generation |
KR101559800B1 (ko) * | 2009-10-25 | 2015-10-13 | 엘지전자 주식회사 | CoMP 동작을 수행하는 무선 통신 시스템에서 단말이 피드백 정보를 전송하는 방법 및 장치 |
CN102056220B (zh) * | 2009-10-28 | 2014-02-19 | 华为技术有限公司 | 实现信道测量的方法及装置 |
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