JP2016021784A - 無線ネットワークでアップリンクサウンディングレファレンス信号の伝送のための方法及び装置 - Google Patents
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- H04W52/146—Uplink power control
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- H04L25/00—Baseband systems
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Abstract
Description
前述したように、LTE−A(Long Term Evolution Advanced)標準のリリース8(Rel−8)及びリリース10(Rel−10)の両方は、移動端末から基地局にアップリンクで伝送されるサウンディングレファレンス信号を使用することを提案する。基地局は、移動端末から基地局にチャネル特性を決定するためにサウンディングレファレンス信号(SRS)を使用する。しかし、LTE−Aのリリース8は、基地局によって設定される周期的なSRSスキームを使用する一方で、リリース10LTE−Aで移動端末(MS)でSRSをトリガーする新しいメカニズムが導入されている。すなわち、非周期SRSトリガーである。
本発明の一実施例において、基地局は、1つ以上のコンポネントキャリア(CC)上で同時非周期SRS(a−SRS)を移動端末からトリガーすることができる。
図5及び図6は、キャリア結合システムで例示的なSRS伝送シナリオを示す。移動端末は、2アップリンクコンポネントキャリア(または2セル)、アップリンクCC1及びアップリンクCC2上で信号(すなわち、SC−FDMシンボル)を伝送するように設定される。図5の左側側面上のサブフレーム1で、移動端末は、連続されたタイムスロットで14シンボルを含む一番目のサブフレームでアップリンクコンポネントキャリアの両方でPUSCHデータを伝送するようにスケジュールされる。アップリンクCC1上の一番目の13シンボル(陰影無し)は、PUSCHデータを含む。最後のSC−FDMシンボル(陰影有り)は、アップリンクCC1上でスケジュールされるサウンディングレファレンス信号(SRS)である。アップリンクCC2上のすべての14 SC−FDMシンボルは、PUSCHデータ(陰影無し)を含む。
他の好ましい方法において、SRSは、SRS SC−FDMシンボルでパワースケールのためにPUSCHのように取り扱われる。もし、SRS SC−FDMシンボルで全体伝送パワーが移動端末最大伝送パワー
111〜116,202〜208 移動端末
120,125 カバレージ領域
130 インターネット
310 空間プロセッシング
Claims (20)
- 端末の無線通信システムのための方法であって、
サウンディングレファレンス信号(sounding reference signal、SRS)を単一キャリア周波数分割多重化(single carrier−frequency division multiplexing、SC−FDM)シンボルで伝送する段階を含み、
もし、端末がSRSトリガー値を含むトリガリンググラント(triggering grant)を受信すると、前記SRSは非周期的SRSであり、前記非周期的SRSは、前記トリガリンググラントに基づいてトリガーされ、
前記SRSを伝送する前記SC−FDMシンボルの全伝送電力が、前記端末の最大伝送電力レベルを超過する場合、前記端末は、スケーリングファクタ(scaling factor)に基づいて、前記SRSの伝送電力をスケール(scale)することを特徴とする方法。 - 前記トリガリンググラントが上りリンクグラントであると、前記SRSの伝送帯域幅は、前記トリガリンググラントに基づいて、第1帯域幅に決定される請求項1に記載の方法。
- 前記トリガリンググラントが下りリンクグラントであると、前記SRSの伝送帯域幅は、前記トリガリンググラントに基づいて、第2帯域幅に決定される請求項3に記載の方法。
- 前記端末は、同じSRSパラメーターと関連した少なくとも1つのトリガリンググラントに基づいて、特定コンポネントキャリア上の特定サブフレームに前記SRSを伝送する請求項1に記載の方法。
- 基地局の無線通信システムのための方法であって、
サウンディングレファレンス信号(sounding reference signal、SRS)を単一キャリア周波数分割多重化(single carrier−frequency division multiplexing、SC−FDM)シンボルで端末から受信する段階を含み、
もし、基地局がSRSトリガー値を含むトリガリンググラント(triggering grant)を伝送すると、前記SRSは非周期的SRSであり、前記非周期的SRSは、前記トリガリンググラントに基づいてトリガーされ、
前記SRSを伝送する前記SC−FDMシンボルの全伝送電力が、前記端末の最大伝送電力レベルを超過する場合、前記端末は、スケーリングファクタ(scaling factor)に基づいて、前記SRSの伝送電力をスケール(scale)することを特徴とする方法。 - 前記トリガリンググラントが上りリンクグラントであると、前記SRSの伝送帯域幅は、前記トリガリンググラントに基づいて、第1帯域幅に決定される請求項6に記載の方法。
- 前記トリガリンググラントが下りリンクグラントであると、前記SRSの伝送帯域幅は、前記トリガリンググラントに基づいて、第2帯域幅に決定される請求項6に記載の方法。
- 前記基地局は、同じSRSパラメーターと関連した少なくとも1つのトリガリンググラントに基づいて、特定コンポネントキャリア上の特定サブフレームで前記SRSを受信する請求項6に記載の方法。
- 無線通信システムのための端末であって、
基地局と信号を送受信する送受信部と、
サウンディングレファレンス信号(sounding reference signal、SRS)を単一キャリア周波数分割多重化(single carrier−frequency division multiplexing、SC−FDM)シンボルで伝送するように制御する制御部と、
を含み、
もし、端末がSRSトリガー値を含むトリガリンググラント(triggering grant)を受信すると、前記SRSは非周期的SRSであり、前記非周期的SRSは、前記トリガリンググラントに基づいてトリガーされ、
前記SRSを伝送する前記SC−FDMシンボルの全伝送電力が、前記端末の最大伝送電力レベルを超過する場合、前記端末は、スケーリングファクタ(scaling factor)に基づいて、前記SRSの伝送電力をスケール(scale)することを特徴とする端末。 - 前記トリガリンググラントが上りリンクグラントであると、前記SRSの伝送帯域幅は、前記トリガリンググラントに基づいて、第1帯域幅に決定される請求項11に記載の端末。
- 前記トリガリンググラントが下りリンクグラントであると、前記SRSの伝送帯域幅は、前記トリガリンググラントに基づいて、第2帯域幅に決定される請求項13に記載の端末。
- 前記端末は、同じSRSパラメーターと関連した少なくとも1つのトリガリンググラントに基づいて、特定コンポネントキャリア上の特定サブフレームに前記SRSを伝送する請求項11に記載の端末。
- 無線通信システムのための基地局であって、
端末と信号を送受信する送受信部と、
サウンディングレファレンス信号(sounding reference signal、SRS)を単一キャリア周波数分割多重化(single carrier−frequency division multiplexing、SC−FDM)シンボルで端末から受信するように制御する制御部を含み、
もし、基地局がSRSトリガー値を含むトリガリンググラント(triggering grant)を伝送すると、前記SRSは非周期的SRSであり、前記非周期的SRSは、前記トリガリンググラントに基づいてトリガーされ、
前記SRSを伝送する前記SC−FDMシンボルの全伝送電力が、前記端末の最大伝送電力レベルを超過する場合、前記端末は、スケーリングファクタ(scaling factor)に基づいて、前記SRSの伝送電力をスケール(scale)することを特徴とする基地局。 - 前記トリガリンググラントが上りリンクグラントであると、前記SRSの伝送帯域幅は、前記トリガリンググラントに基づいて、第1帯域幅に決定される請求項16に記載の基地局。
- 前記トリガリンググラントが下りリンクグラントであると、前記SRSの伝送帯域幅は、前記トリガリンググラントに基づいて、第2帯域幅に決定される請求項18に記載の基地局。
- 前記基地局は、同じSRSパラメーターと関連した少なくとも1つのトリガリンググラントに基づいて、特定コンポネントキャリア上の特定サブフレームで前記SRSを受信する請求項16に記載の基地局。
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US61/408,445 | 2010-10-29 | ||
US201161479282P | 2011-04-26 | 2011-04-26 | |
US61/479,282 | 2011-04-26 | ||
US13/205,430 US9131457B2 (en) | 2010-08-12 | 2011-08-08 | Apparatus and method for transmission of uplink sounding reference signals in a wireless network |
US13/205,430 | 2011-08-08 |
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US9363769B2 (en) * | 2010-05-05 | 2016-06-07 | Qualcomm Incorporated | Methods and systems for SRS power scaling in carrier aggregation |
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US10805886B2 (en) | 2020-10-13 |
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