JP5453374B2 - Mimoシステムのロバストランク予測 - Google Patents
Mimoシステムのロバストランク予測 Download PDFInfo
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Description
本出願は、2005年6月16日に出願され、この譲受人に譲渡され、かつ参照して本明細書に組み込まれている「干渉のロバストランク予測、電力制御、チャネル推定、パケットフォーマットおよびアドミッション制御(ROBUST RANK PREDICTION FOR INTERFERENCE, POWER CONTROL, CHANNEL ESTIMATION, PACKET FORMATS AND ADMISSION CONTROL)」と題された米国仮特許出願第60/691,723号に対して優先権を主張するものである。
式(2)ここでs(k)は、サブキャリアkのデータシンボルのM×1ベクトルであり、
r(k)は、サブキャリアkの受信シンボルのR×1ベクトルであり、
H M(k)=H(k)・P M(k)は、サブキャリアkのR×M有効MIMOチャネル応答行列であり、
n(k)は、サブキャリアkのR×1雑音ベクトルである。
SNRm,i(k)は、サブキャリアkのデータシンボルストリームiのSNRである。
ランク選択器330は次に、T個の可能なランクのうちの1つを選択する。一実施形態では、ランク選択器330は、以下のように、最大総容量を有するランクを提供する。
ここでCmaxは全T個の可能なランクおよびβ≦1.0に対する最大総容量である。より低いランクは概して、劣悪なチャネル条件およびチャネル推定誤りに対してよりロバストである。従って、より低いランクが、最大総容量に近い総容量を達成できる場合、このより低いランクが選択されて使用されてもよい。
ランク選択器430は次に、T個の可能なランクのうちの1つを選択する。一実施形態では、ランク選択器430は、以下のように最大総スループットを有するランクを提供する。
ここで、TPmaxは全T個の可能なランクに対する最大総スループットである。
以下に、本願出願の当初の特許請求の範囲に記載された発明をする。
[1] 少なくとも1つのプロセッサであって、
複数のランクの性能メトリクスを決定し、各ランクは多入力多出力(MIMO)チャネルを介して同時送信する異なる数のデータストリームを示し、
前記複数のランクの前記性能メトリクスに調整を施して、調整済み性能メトリクスを取得し、前記調整はシステム損失を補っており、
前記調整済み性能メトリクスに基づいて前記複数のランクからデータ送信に使用するランクを選択するように構成されている少なくとも1つのプロセッサと、
前記少なくとも1つのプロセッサに結合されているメモリと、
を備える装置。
[2] 前記性能メトリクスは、前記MIMOチャネルの容量に関する、[1]に記載の装置。
[3] 前記性能メトリクスは、前記MIMOチャネルを介して送信されるデータ送信のスループットに関する、[1]に記載の装置。
[4] 前記性能メトリクスは、前記MIMOチャネルの信号品質に関する、[1]に記載の装置。
[5] 前記調整は、データ送信に使用される誤り訂正符号による損失を補っている、[1]に記載の装置。
[6] 前記調整は、受信機でのチャネル推定誤りを補っている、[1]に記載の装置。
[7] 前記調整は、受信機によって観察される干渉の変動を補っている、[1]に記載の装置。
[8] 前記調整は、データ送信に使用される送信電力の変動を補っている、[1]に記載の装置。
[9] 前記少なくとも1つのプロセッサは、
閾値未満の性能メトリクスを有するランクを省略するように構成されている、[1]に記載の装置。
[10] 前記少なくとも1つのプロセッサは、
前記複数のランクの前記性能メトリクスを値の範囲内に制限するように構成されている、[1]に記載の装置。
[11] 前記値の範囲は、データ送信に使用可能なパケットフォーマットによって決定される、[10]に記載の装置。
[12] 前記少なくとも1つのプロセッサは、
最良の調整済み性能メトリクスを有するランクを選択するように構成されている、[1]に記載の装置。
[13] 前記少なくとも1つのプロセッサは、
前記複数のランクの前記調整済み性能メトリクスのうちで最良の調整済み性能メトリクスを決定し、
前記最良の調整済み性能メトリクスの所定のパーセンテージ内の調整済み性能メトリクスを有する最低ランクを選択するように構成されている、[1]に記載の装置。
[14] 前記少なくとも1つのプロセッサは、
所定数のビットによって前記選択されたランクを表し、
前記選択されたランクを送信機に送信するように構成されている、[1]に記載の装置。
[15] 前記少なくとも1つのプロセッサは、
前記選択されたランクの調整済み性能メトリクスに基づいて少なくとも1つのチャネル品質インジケータ(CQI)を決定するように構成されている、[1]に記載の装置。
[16] 前記少なくとも1つのプロセッサは、
前記選択されたランクの調整済み性能メトリクスに基づいて信号対雑音比(SNR)を決定し、
前記SNRを量子化して、前記選択されたランクのチャネル品質インジケータ(CQI)を取得するように構成されている、[1]に記載の装置。
[17] 前記メモリは、前記性能メトリクスの調整に関する少なくとも1つのルックアップテーブルを記憶するように構成されている、[1]に記載の装置。
[18] 複数のランクの性能メトリクスを決定するステップであって、各ランクは多入力多出力(MIMO)チャネルを介して同時送信する異なる数のデータストリームを示しているステップと、
前記複数のランクの前記性能メトリクスに調整を施して、調整済み性能メトリクスを取得するステップであって、前記調整はシステム損失を補っているステップと、
前記調整済み性能メトリクスに基づいて前記複数のランクからデータ送信に使用するランクを選択するステップと、
を備える方法。
[19] 性能メトリクスを決定するステップは、前記MIMOチャネルの容量、前記MIMOチャネルを介して送信されるデータ送信のスループット、または前記MIMOチャネルの信号品質のうちの1つ以上に関する性能メトリクスを決定するステップを備える、[18]に記載の方法。
[20] 前記性能メトリクスのうちの1つ以上に関する調整を計算するステップをさらに備える、[18]に記載の方法。
[21] 計算するステップは、データ送信に使用される誤り訂正符号、受信機におけるチャネル推定誤り、前記受信機によって観察される干渉の変動、データ送信に使用される送信電力の変動、またはこれらの組み合わせのうちの1つ以上による損失を補うように計算するステップを備える、[20]に記載の方法。
[22] 複数のランクの性能メトリクスを決定する手段であって、各ランクは多入力多出力(MIMO)チャネルを介して同時送信する異なる数のデータストリームを示す手段と、
前記複数のランクの前記性能メトリクスに調整を施して、調整済み性能メトリクスを取得する手段であって、前記調整はシステム損失を補っている手段と、
前記調整済み性能メトリクスに基づいて前記複数のランクからデータ送信に使用するランクを選択する手段と、
を備える装置。
[23] 性能メトリクスを決定する前記手段は、前記MIMOチャネルの容量、前記MIMOチャネルを介して送信されるデータ送信のスループット、または前記MIMOチャネルの信号品質のうちの1つ以上に関する性能メトリクスを決定する手段を備える、[22]に記載の装置。
[24] 前記性能メトリクスの1つ以上に関する調整を計算する手段をさらに備える、[22]に記載の装置。
[25] 前記計算する手段は、データ送信に使用される誤り訂正符号、受信機におけるチャネル推定誤り、前記受信機によって観察される干渉の変動、データ送信に使用される送信電力の変動、またはこれらの組み合わせのうちの1つ以上による損失を補うように計算する手段を備える、[24]に記載の装置。
[26] 命令を記憶するプロセッサ読み取り可能な媒体であって、前記命令は、
複数のランクの性能メトリクスを決定する命令であって、各ランクは多入力多出力(MIMO)チャネルを介して同時送信する異なる数のデータストリームを示している命令と、
前記複数のランクの前記性能メトリクスに調整を施して、調整済み性能メトリクスを取得する命令であって、前記調整はシステム損失を補っている命令と、
前記調整済み性能メトリクスに基づいて前記複数のランクからデータ送信に使用するランクを選択する命令とを備える、プロセッサ読み取り可能な媒体。
Claims (26)
- 多入力多出力MIMOチャネルのランクを決定する装置であって、
少なくとも1つのプロセッサであって、
複数のランクについて複数の性能メトリクスを決定する手段、ここで、各ランクは多入力多出力MIMOチャネルを介して同時送信する異なる数のデータストリームを示し、前記決定する手段は、(i)前記MIMOチャネルの1つまたは複数のサブキャリアについて後処理メトリクスを生成するために、前記MIMOチャネルの応答メトリクスに空間マッパを適用すること、(ii)前記MIMOチャネルの1つまたは複数のサブキャリアに対し信号対雑音および干渉比(SINR)を計算すること、(iii)受信機の信号対雑音比(SNR)を前記MIMOチャネルの1つまたは複数のサブキャリアの容量にマッピングすること、および/または(iv)前記MIMOチャネルの1つまたは複数のサブキャリアの平均容量を計算すること、のうちの1つまたは複数を実行することによって、前記性能メトリクスを決定する、および
複数の調整済み性能メトリクスを取得するために、前記複数のランクの前記複数の性能メトリクスに調整を施す手段と、ここで前記調整はシステム損失を補う、
を備える少なくとも1つのプロセッサと、
前記複数の調整済み性能メトリクスに基づいて前記複数のランクからデータ送信に使用するランクを選択する手段と、
前記少なくとも1つのプロセッサに結合されているメモリと、
を備える装置。 - 前記性能メトリクスは、前記MIMOチャネルの容量に関する、請求項1に記載の装置。
- 前記性能メトリクスは、前記MIMOチャネルを介して送信されるデータ送信のスループットに関する、請求項1に記載の装置。
- 前記性能メトリクスは、前記MIMOチャネルの信号品質に関する、請求項1に記載の装置。
- 前記調整は、データ送信に使用される誤り訂正符号による損失を補う、請求項1に記載の装置。
- 前記調整は、前記受信機でのチャネル推定誤りを補う、請求項1に記載の装置。
- 前記調整は、前記受信機によって観察される干渉の変動を補う、請求項1に記載の装置。
- 前記調整は、データ送信に使用される送信電力の変動を補う、請求項1に記載の装置。
- 前記少なくとも1つのプロセッサは、さらに、
閾値未満の性能メトリクスを有するランクを省略する手段を備える請求項1に記載の装置。 - 前記調整を施す手段は、
前記プロセッサが所与の値の範囲内にある値を有する性能メトリクスと関連する前記複数のランクのうちのランクにのみ基づきランク選択を実行するように、前記複数のランクから、所与の値の範囲外にある値を有する性能メトリクスに関連するランクを除外することにより、前記複数のランクについての複数の性能メトリクスに調整を施す、請求項1に記載の装置。 - 前記所与の値の範囲は、データ送信に使用可能なパケットフォーマットによって決定される、請求項10に記載の装置。
- 前記複数の調整済み性能メトリクスのそれぞれは値に関連し、前記少なくとも1つのプロセッサは、前記複数の調整済み性能メトリクスの関連する複数の値に基づき最も高いレベルの性能を提供することが期待されるランクを選択する、請求項1に記載の装置。
- 前記複数の調整済み性能メトリクスのそれぞれは値に関連し、前記少なくとも1つのプロセッサは、
前記複数の調整済み性能メトリクスの関連する複数の値に基づき最も高いレベルの性能を提供することが期待されるランクを決定する手段と、
前記最も高いレベルの性能を提供することが期待されるランクの前記調整済み性能メトリクス値に基づき所与の値の範囲を設定する手段と、
(i)前記複数の調整済み性能メトリクスの前記関連する複数の値に基づき最低レベルの性能を提供することが期待され、(ii)前記所与の値の範囲内にある調整済み性能メトリクス値も有するランクを選択する手段と、
を備える請求項1に記載の装置。 - 前記少なくとも1つのプロセッサは、さらに、
所定数のビットによって前記選択されたランクを表し、前記選択されたランクを送信機に送信する手段を備える、請求項1に記載の装置。 - 前記少なくとも1つのプロセッサは、さらに、
前記選択されたランクの調整済み性能メトリクスに基づいて少なくとも1つのチャネル品質インジケータ(CQI)を決定する手段を備える、請求項1に記載の装置。 - 前記少なくとも1つのプロセッサは、さらに、
前記選択されたランクの調整済み性能メトリクスに基づいて信号対雑音比(SNR)を決定し、前記選択されたランクのチャネル品質インジケータ(CQI)を取得するために前記SNRを量子化する手段を備える、請求項1に記載の装置。 - 前記メモリは、前記性能メトリクスの調整に関する少なくとも1つのルックアップテーブルを記憶する、請求項1に記載の装置。
- 多入力多出力(MIMO)チャネルのランクを決定する方法であって、
複数のランクについての複数の性能メトリクスを決定すること、ここで、各ランクは多入力多出力(MIMO)チャネルを介して同時送信する異なる数のデータストリームを示し、前記複数の性能メトリクスを決定することは、(i)後処理メトリクスを生成するために、前記MIMOチャネルの1つまたは複数のサブキャリアに対し、前記MIMOチャネルの応答メトリクスに空間マッパを適用すること、(ii)前記MIMOチャネルの1つまたは複数のサブキャリアに対し信号対雑音および干渉比(SINR)を計算すること、(iii)受信機の信号対雑音比(SNR)を前記MIMOチャネルの1つまたは複数のサブキャリアの容量にマッピングすること、および/または(iv)前記MIMOチャネルの1つまたは複数のサブキャリアの平均容量を計算すること、のうちの1つまたは複数を含む、および
複数の調整済み性能メトリクスを取得するために、前記複数のランクの前記複数の性能メトリクスに調整を施すこと、ここで前記調整はシステム損失を補う、
前記複数の調整済み性能メトリクスに基づいて前記複数のランクからデータ送信に使用するランクを選択すること、
を備える方法。 - 前記複数の性能メトリクスを決定することは、前記MIMOチャネルの容量、前記MIMOチャネルを介して送信されるデータ送信のスループット、または前記MIMOチャネルの信号品質のうちの1つまたは複数について性能メトリクスを決定することを備える、請求項18に記載の方法。
- 前記複数の性能メトリクスのうちの1つまたは複数について調整を計算することをさらに備える、請求項18に記載の方法。
- 前記計算することは、データ送信に使用される誤り訂正符号、前記受信機におけるチャネル推定誤り、前記受信機によって観察される干渉の変動、データ送信に使用される送信電力の変動、またはこれらの組み合わせのうちの1つまたは複数による損失を補うために計算することを備える、請求項20に記載の方法。
- 多入力多出力MIMOチャネルのランクを決定する装置であって、
複数のランクについて複数の性能メトリクスを決定する手段、ここで、各ランクは多入力多出力(MIMO)チャネルを介して同時送信する異なる数のデータストリームを示し、前記決定する手段は、(i)前記MIMOチャネルの1つまたは複数のサブキャリアについて後処理メトリクスを生成するために、前記MIMOチャネルの応答メトリクスに空間マッパを適用すること、(ii)前記MIMOチャネルの1つまたは複数のサブキャリアに対し信号対雑音および干渉比(SINR)を計算すること、(iii)受信機の信号対雑音比(SNR)を前記MIMOチャネルの1つまたは複数のサブキャリアの容量にマッピングすること、および/または(iv)前記MIMOチャネルの1つまたは複数のサブキャリアの平均容量を計算すること、のうちの1つまたは複数を実行することによって、前記性能メトリクスを決定する、および
複数の調整済み性能メトリクスを取得するために、前記複数のランクの前記複数の性能メトリクスに調整を施す手段と、ここで、前記調整はシステム損失を補う、
前記複数の調整済み性能メトリクスに基づいて前記複数のランクからデータ送信に使用するランクを選択する手段と、
を備える装置。 - 前記性能メトリクスを決定する手段は、前記MIMOチャネルの容量、前記MIMOチャネルを介して送信されるデータ送信のスループット、または前記MIMOチャネルの信号品質のうちの1つ以上に関する性能メトリクスを決定する手段を備える、請求項22に記載の装置。
- 前記複数の性能メトリクスの1つまたは複数について調整を計算する手段をさらに備える、請求項22に記載の装置。
- 前記計算する手段は、データ送信に使用される誤り訂正符号、受信機におけるチャネル推定誤り、前記受信機によって観察される干渉の変動、データ送信に使用される送信電力の変動、またはこれらの組み合わせのうちの1つまたは複数による損失を補うために計算する手段を備える、請求項24に記載の装置。
- プロセッサにより実行されると、前記プロセッサに多入力多出力MIMOチャネルのランクを決定する方法を実行させる命令を記憶するプロセッサ読み取り可能な媒体であって、前記命令は、
複数のランクの性能メトリクスを決定する命令、ここで、各ランクは多入力多出力(MIMO)チャネルを介して同時送信する異なる数のデータストリームを示し、前記性能メトリクスを決定することは、(i)前記MIMOチャネルの1つまたは複数のサブキャリアについて後処理メトリクスを生成するために、前記MIMOチャネルの応答メトリクスに空間マッパを適用すること、(ii)前記MIMOチャネルの1つまたは複数のサブキャリアに対し信号対雑音および干渉比(SINR)を計算すること、(iii)受信機の信号対雑音比(SNR)を前記MIMOチャネルの1つまたは複数のサブキャリアの容量にマッピングすること、および/または(iv)前記MIMOチャネルの1つまたは複数のサブキャリアの平均容量を計算すること、のうちの1つまたは複数を含む、
複数の調整済み性能メトリクスを取得するために、前記複数のランクの前記複数の性能メトリクスに調整を施す命令、ここで前記調整はシステム損失を補う、および、
前記複数の調整済み性能メトリクスに基づいて前記複数のランクからデータ送信に使用するランクを選択する命令、
を備える、プロセッサ読み取り可能な媒体。
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CN101233713B (zh) | 2013-01-16 |
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RU2386214C2 (ru) | 2010-04-10 |
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EP1897258B1 (en) | 2018-05-23 |
JP2008544653A (ja) | 2008-12-04 |
WO2006138337A1 (en) | 2006-12-28 |
KR101057613B1 (ko) | 2011-08-18 |
EP1897258A1 (en) | 2008-03-12 |
CN101233713A (zh) | 2008-07-30 |
KR20080026620A (ko) | 2008-03-25 |
CA2612318A1 (en) | 2006-12-28 |
MX2007015985A (es) | 2008-03-07 |
BRPI0612224B1 (pt) | 2019-05-28 |
TWI319665B (en) | 2010-01-11 |
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