JP2014197871A - サウンディング参照信号(srs)送信の電力制御のための方法および機器 - Google Patents
サウンディング参照信号(srs)送信の電力制御のための方法および機器 Download PDFInfo
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- 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
- H04B7/0602—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 antenna switching
- H04B7/0608—Antenna selection according to transmission parameters
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- 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
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- H04W52/04—Transmission power control [TPC]
- H04W52/18—TPC being performed according to specific parameters
- H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
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Abstract
【解決手段】こうした方法および機器は、キャリア集約技術を使用する、WTRUにおけるキャリア固有およびキャリア共通SRS電力制御のための方法および機器を含む。こうした方法および機器は、キャリア集約およびTDM(時分割多重化)技術両方を使用する、WTRUにおけるSRS電力制御のための方法および機器を含む。さらに、こうした方法および機器は、多重入出力MIMO動作を使用する、WTRU用のSRS電力制御のための方法および機器も含む。WTRUにおけるSRSオーバーヘッド削減および電力管理のための方法および機器についても開示する。
【選択図】図3
Description
本願は、参照により本明細書において完全に説明されているものとして組み込まれている、2009年3月17日に出願した米国特許仮出願第61/160,979号明細書の利益を主張する。
によって定義され、上式では、以下のようになる。
上式で、v_normは、入力信号の正規化された電圧波形であり、v_norm_refは、参照信号の正規化された電圧波形(12.2kbpsのAMR音声)であり、
20*log10((v_norm_ref3)rms)=1.52dB 式3
である。
PSRS(i)=min{PMAX,PSRS_OFFSET+10log10(MSRS)+PO_PUSCH(j)+α・PL(k)+f(i)}[dBm] 式4
によって定義される。
PSRS(i,k)=min{PMAX(k),PSRS_OFFSET(k)+10log10(MSRS(k))+PO_PUSCH(j,k)+α(k)・PL(k)+f(i,k)} 式5
上式で、kは、キャリア索引である。
PSRS(i)=min{PMAX,PSRS_OFFSET+10log10(MSRS)+PO_PUSCH(j)+α・PL+f(i)} 式7
上式で、PSRS_OFFSET、MSRS、PL、f(i)はそれぞれ、ULキャリアすべてにわたってそれぞれが組み合わされるキャリア共通パラメータを表す。たとえば、
PSRS(i,k)=min{PMAX,PSRS_OFFSET(k)+10log10(MSRS(k))+PO_PUSCH(j,k)+α(k)・PL(k)+f(i,k)} 式9
のように、合計WTRU最大電力である。
PSRS(i,n)=min{PMAX,PSRS_OFFSET+10log10(MSRS(i,n))+PO_PUSCH(j)+α・PL+f(i)+ΔSRS_MIMO(j)} 式10
となるように、LTE UL PC公式を修正することであり、上式で、nは、アンテナポート(または層)索引である。
1.同時に送信されるコンポーネントキャリアを使う、ワイヤレス送受信ユニット(WTRU)におけるサウンディング参照信号(SRS)電力制御のための方法であって、
各コンポーネントキャリアに対するSRS送信電力レベルを、選択された制約SRS電力レベルに設定することを含む方法。
Claims (3)
- ワイヤレス送受信ユニット(WTRU)におけるサウンディング参照信号(SRS)電力制御のための方法であって、
複数のコンポーネントキャリアの各コンポーネントキャリアに対するSRS電力レベルを算出するステップと、
前記算出されたSRS電力レベル、およびコンポーネントキャリアに基づく最大電力レベルの低い方を、前記複数のコンポーネントキャリアの各コンポーネントキャリアに対する実際のSRS電力レベルとして選択するステップと、
前記複数のコンポーネントキャリアの各コンポーネントキャリアに対するSRS送信電力レベルを、前記選択された実際のSRS電力レベルに設定するステップと、
前記複数のコンポーネントキャリアに対する要求される送信電力の合計が最大電力レベルを超えるという条件で、前記複数のコンポーネントキャリアの少なくとも一部に対する前記SRS送信電力レベルを減らすステップと、
前記複数のコンポーネントキャリアを送信するステップと
を含むことを特徴とする方法。 - 前記コンポーネントキャリアに基づく最大電力レベルは、
コンポーネントキャリア固有SRS電力オフセット、
コンポーネントキャリア固有SRS帯域幅パラメータ、
コンポーネントキャリア固有開ループ電力パラメータ、
コンポーネントキャリア固有経路損失補償係数、または
コンポーネントキャリア固有閉ループ電力調整関数
の少なくとも1つに基づくキャリア固有電力レベルであることを特徴とする請求項1に記載の方法。 - 前記算出されたSRS電力レベルは、サウンディング参照信号(SRS)オフセット、リソースSRS送信の帯域幅、セル固有名目コンポーネント、セル固有パラメータ、ダウンリンク経路損失推定値、およびPUSCH(物理アップリンク共有チャネル)用の現在の電力制御調整に基づくことを特徴とする請求項1に記載の方法。
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