JP6832825B2 - アップリンクにおける多重アンテナ送信の送信電力制御 - Google Patents
アップリンクにおける多重アンテナ送信の送信電力制御 Download PDFInfo
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Description
本出願は、参照により本明細書に組み込まれている、2009年10月2日に出願した米国特許仮出願第61/248,034号明細書および2009年10月2日に出願した米国特許仮出願第61/247,995号明細書の利益を主張するものである。
Pout1=|w1|2G1 式(1)
Pout2=|w2|2G2 式(2)
と表すことができ、式中、G1およびG2は、それぞれ、増幅器PA1およびPA2の電力利得である。重みw1およびw2が制約されていない場合、図2の送信機は、両方のアンテナ上で総和されたときに一定の電力出力を発生しえない。
Pout1=α2G1 式(3)
Pout2=(1−α2)G2 式(4)
と表すことができる。
Pmax,tx=min{Maximum_allowed_UL_TX_Power,Pmax} 式(5)
と定義され、式中、Maximum_allowed_UL_TX_Powerは、UMTS地上無線アクセスネットワーク(UTRAN)によって設定され、Pmaxは、WTRU電力クラスに基づくWTRU公称最大出力電力である。
PDPCCH=max(PDPCCH,filtered,1,PDPCCH,filtered,2) 式(11)
のようにフィルタ処理されたDPCCH電力推定値の最大値を選択することによってDPCCHコード電力を計算する。
PDPCCH=PDPCCH,filtered,1+PDPCCH,filtered,2 式(14)
のように実行することができる。
UPH=Pmax,α/PDPCCH 式(15)
のように計算され、式中、PDPCCHは、DPCCH上の送信コード電力である。
UPH=min(UPH1,UPH2) 式(16)
のように報告することができ、式中、UPHは、WTRUによってスケジューリング情報(SI)の一部としてネットワークに報告される値である。
UPH=max(UPH1,UPH2) 式(21)
のように報告することができる。
PDPCCH(t)=PDPCCH,1(t)+PDPCCH,2(t) 式(30)
のように実行し、式中、Pmax,tx,1およびPmax,tx,2は、それぞれ、送信アンテナ1および2からのWTRUの最大送信電力である。次いで、WTRUは、平均期間(例えば、100ms)にわたってステップ毎のUPHであるUPH(t)を平均して、ネットワークに報告すべきUPHを求めることを、
(1)ネットワークによって構成されるような最大許容電力、
(2)WTRUカテゴリによって記述されるような最大許容電力、
(3)WTRUがUL TXダイバーシティオペレーション用に構成されている場合にWTRUカテゴリによって定義されている通りの最大許容電力の半分、または
(4)ネットワークによって構成されているような、またはWTRUカテゴリによって記述されているような、最大許容電力の割合ρ(ネットワークによって構成されている、または規格に事前に定義されている)。
α2:アンテナ2に対する重み利得
(φ1):アンテナ1に対する位相
(φ2):アンテナ2に対する位相
Tth:閾値。
絶対的変化量≡Cabs,j=|α’j−αj| 式(40)
のように振幅利得を計算することができる。変化量が閾値より大きい場合(つまり、Cabs,j>Tth)、第2のステップを適用する。
Δmimo値は、送信されたTBサイズの対(ストリーム毎の1つのTBサイズ)に依存しうる。ストリーム間干渉の比は、それぞれのストリームの間の相対的電力にある程度依存する。したがって、大きなトランスポートブロックが小さなトランスポートブロックに対して及ぼす干渉は、大きなトランスポートブロックに対して及ぼす干渉に比べて比較的大きいものとしてよい。
DPCCH電力調整を適用した後のWTRUの総送信電力が最大許容値を超えた場合、電力スケーリングを2つのE−DCHストリームに並行して適用することができる。E−DPDCH(複数可)は、最初に、他のチャネルがスケーリングされる前に両方のストリーム上でβed,k,reduced=βed,k,minとなるまでスケールダウンされうる。最高のDPCCH電力を有するE−DPDCHストリームは、最初に、そのストリーム上でβed,k,reduced=βed,k,minとなるまでスケールダウンされうる。次いで、必要ならば、他方のストリーム上のE−DPDCHを、そのストリーム上でβed,k,reduced=βed,k,minとなるまでスケールダウンされうる。両方のストリーム上でβed,k,reduced=βed,k,minである場合、両方のストリーム上のすべてのチャネルの等しいスケーリングが適用されうる。βed,k,minは、ストリーム毎に構成可能であるものとしてよい。
表4のストリーム1およびストリーム2の列は、それぞれ、第1および第2のストリーム(または同等であるが、第1および第2のDPCCH)に対するTPCコマンド解釈に対応する。二重コードワード送信を行うMIMOモード用に構成されているWTRUでは、WTRUに対するTPCコマンドは、表4に従って解釈される。
後方互換性を維持するために二重ストリームに対する新しいTPCビットパターンを定義することができる。例えば、表5は、NTPC=4のスロットフォーマット0Cに対するTPCビットパターンおよび後方互換性のために用意されているNTPC=8スロットフォーマット0Dを示している。異なるスロットフォーマットに対して、類似の表を導出することができる。第1のストリームに対するTPC情報は、信号ストリームの場合と同じである。
別の実施形態によれば、より多くの情報ビットを送信するために、拡散係数がより小さい新しいF−DPCHフォーマットを導入することができる。
1.WTRUでのアップリンクにおける多重アンテナ送信の送信電力制御のための方法。
Claims (8)
- ワイヤレス送受信ユニット(WTRU)であって、
ネットワークから上位レイヤメッセージを受信する手段であって、前記上位レイヤメッセージは、少なくとも1つの送信ダイバーシティオフセット値を含み、前記少なくとも1つの送信ダイバーシティオフセット値は、通信フォーマットに関連する、手段と、
アップリンク物理チャネルを使用して信号を送信する電力レベルを判定する手段であって、前記少なくとも1つの送信ダイバーシティオフセット値は、前記通信フォーマットに基づいて前記電力レベルを判定するために利用される、手段と、
前記信号を前記判定された電力レベルにて送信する手段と
を備えたWTRU。 - 前記アップリンク物理チャネルは、制御チャネルである、請求項1のWTRU。
- 前記少なくとも1つの送信ダイバーシティオフセット値は、デルタ(Δ)値である、請求項1のWTRU。
- 別の信号は、前記信号と同じ時間間隔において送信され、前記信号および前記別の信号の送信ダイバーシティは異なる、請求項1のWTRU。
- ワイヤレス送受信ユニット(WTRU)によって実行される方法であって、前記方法は、
前記WTRUによって、ネットワークから上位レイヤメッセージを受信することであって、前記上位レイヤメッセージは、少なくとも1つの送信ダイバーシティオフセット値を含み、前記少なくとも1つの送信ダイバーシティオフセット値は、通信フォーマットに関連する、ことと、
前記WTRUによって、アップリンク物理チャネルを使用して信号を送信する電力レベルを判定することであって、前記少なくとも1つの送信ダイバーシティオフセット値は、前記通信フォーマットに基づいて前記電力レベルを判定するために利用される、ことと、
前記WTRUによって、前記信号を前記判定された電力レベルにて送信することと
を備える方法。 - 前記アップリンク物理チャネルは、制御チャネルである、請求項5の方法。
- 前記少なくとも1つの送信ダイバーシティオフセット値は、デルタ(Δ)値である、請求項5の方法。
- 別の信号は、前記信号と同じ時間間隔において送信され、前記信号および前記別の信号の送信ダイバーシティは異なる、請求項5の方法。
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AU2010300408B2 (en) | 2014-04-17 |
JP2016119690A (ja) | 2016-06-30 |
KR101700471B1 (ko) | 2017-01-26 |
WO2011041719A2 (en) | 2011-04-07 |
TWI519189B (zh) | 2016-01-21 |
US20180132195A1 (en) | 2018-05-10 |
US9031600B2 (en) | 2015-05-12 |
CN102577542A (zh) | 2012-07-11 |
EP3410789A1 (en) | 2018-12-05 |
KR20120107937A (ko) | 2012-10-04 |
AU2010300408A1 (en) | 2012-04-26 |
AU2014204450A1 (en) | 2014-07-31 |
AU2014204450B2 (en) | 2016-05-12 |
CN104270808A (zh) | 2015-01-07 |
JP5879404B2 (ja) | 2016-03-08 |
JP2015008501A (ja) | 2015-01-15 |
JP6220907B2 (ja) | 2017-10-25 |
TW201119451A (en) | 2011-06-01 |
US9867147B2 (en) | 2018-01-09 |
US10602458B2 (en) | 2020-03-24 |
WO2011041719A3 (en) | 2011-07-21 |
US20150245304A1 (en) | 2015-08-27 |
JP2018042249A (ja) | 2018-03-15 |
JP2020025365A (ja) | 2020-02-13 |
JP5597715B2 (ja) | 2014-10-01 |
JP2013507071A (ja) | 2013-02-28 |
EP2484163A2 (en) | 2012-08-08 |
US20110105174A1 (en) | 2011-05-05 |
CN104270808B (zh) | 2018-02-16 |
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