JP5763845B2 - 多重コンポーネントキャリアシステムにおけるアップリンク伝送電力の制御装置及び方法 - Google Patents
多重コンポーネントキャリアシステムにおけるアップリンク伝送電力の制御装置及び方法 Download PDFInfo
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- H04W52/14—Separate analysis of uplink or downlink
- H04W52/146—Uplink power control
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- H—ELECTRICITY
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- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
- H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
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- H04W52/18—TPC being performed according to specific parameters
- H04W52/28—TPC being performed according to specific parameters using user profile, e.g. mobile speed, priority or network state, e.g. standby, idle or non transmission
- H04W52/281—TPC being performed according to specific parameters using user profile, e.g. mobile speed, priority or network state, e.g. standby, idle or non transmission taking into account user or data type priority
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Description
キャリアアグリゲーションは、図2のようなバンド内(intra−band)隣接(contiguous)キャリアアグリゲーション、図3のようなバンド内非隣接(non−contiguous)キャリアアグリゲーション、そして、図4のようなバンド間(inter−band)キャリアアグリゲーションに分けられることができる。
第5に、NAS(non−access stratum)情報は、主サービングセルを介して受信する。
第8に、副サービングセルの再設定(reconfiguration)、追加(adding)、及び除去(removal)のような手順は、RRC階層により行われ得る。新規副サービングセルの追加において、専用(dedicated)の副サービングセルのシステム情報を伝送するのにRRCシグナリングが使用され得る。
すなわち、端末は、優先順位が低いPRACHの伝送電力を減少させて最大送信電力をP’cmax、cになるようにし、これにより、推定余剰電力がP’PH、c−type1またはP’PH、c−type2になるように調整する。
このように、PMPRcにより各サービングセルでの最大送信電力Pcmax、cが変更される。各サービングセルでの最大送信電力Pcmax、cが変更されれば、結果的に余剰電力も変更される。
電力調整部1011は、第1のサブフレームで推定される推定余剰電力(estimated−PH:E−PH)を計算する。ここで、第1のサブフレームは、端末1000に構成された第1のサービングセルと第2のサービングセル上に物理アップリンクチャネルまたは信号が伝送される時間区間を意味する。推定余剰電力は、タイプ1の余剰電力とタイプ2の余剰電力を含む。タイプ1の余剰電力は数式1により、タイプ2の余剰電力は数式2により計算される。
Claims (18)
- 多重コンポーネントキャリアシステムにおける端末によるアップリンク伝送電力の制御方法であって、
第1のサービングセル(serving cell)上で伝送されるアップリンク信号を生成するステップと、
第2のサービングセルに対するランダムアクセス手順の開始を命令するランダムアクセス開始情報を基地局から受信するステップと、
前記アップリンク信号の伝送のためにスケジューリングされた第1の伝送電力と、ランダムアクセスプリアンブルがマッピングされる物理ランダムアクセスチャネル(physical random access channel:PRACH)の伝送のためにスケジューリングされた第2の伝送電力とに基づいて推定余剰電力(estimated power headroom)を計算するステップと、
前記推定余剰電力が臨界電力より小さい場合、電力割当優先順位に基づいて前記第1の伝送電力または前記第2の伝送電力を調整して、前記アップリンク信号及び前記PRACHを同時に伝送する、または、前記電力割当優先順位に基づいて前記アップリンク信号及び前記PRACHのうちいずれか1つを選択的に伝送するステップと、
を含むことを特徴とするアップリンク伝送電力の制御方法。 - 前記第1の伝送電力または前記第2の伝送電力の調整は、
前記PRACHが前記アップリンク信号より優先順位が高い場合、前記第1の伝送電力を減少させることを含むことを特徴とする請求項1に記載のアップリンク伝送電力の制御方法。 - 前記アップリンク信号は、サウンディング基準信号(sounding reference signal:SRS)であることを特徴とする請求項2に記載のアップリンク伝送電力の制御方法。
- 前記アップリンク信号は、物理アップリンク共用チャネル(physical uplink shared channel:PUSCH)であることを特徴とする請求項2に記載のアップリンク伝送電力の制御方法。
- 前記第1の伝送電力または前記第2の伝送電力の調整は、
前記アップリンク信号が前記PRACHより優先順位が高い場合、前記第2の伝送電力を減少させることを含むことを特徴とする請求項1に記載のアップリンク伝送電力の制御方法。 - 前記アップリンク信号は、物理アップリンク制御チャネル(physical uplink control channel:PUCCH)であることを特徴とする請求項5に記載のアップリンク伝送電力の制御方法。
- 前記アップリンク信号は、ACK/NACK信号、チャネル品質情報(channel quality information:CQI)、及びランク指示子(rank indicator)のうち、少なくとも1つを含むPUSCHであることを特徴とする請求項5に記載のアップリンク伝送電力の制御方法。
- 前記臨界電力は、0dBであることを特徴とする請求項1に記載のアップリンク伝送電力の制御方法。
- 前記推定余剰電力が前記臨界電力より小さい場合、前記推定余剰電力の報告をトリガリング(triggering)するステップをさらに含むことを特徴とする請求項1に記載のアップリンク伝送電力の制御方法。
- 多重コンポーネントキャリアシステムにおけるアップリンク伝送電力を制御する端末であって、
第1のサービングセル(servingcell)上で伝送されるアップリンク信号を生成する信号生成部と、
第2のサービングセルに対するランダムアクセス手順の開始を命令するランダムアクセス開始情報を基地局から受信する受信部と、
前記アップリンク信号の伝送のためにスケジューリングされた第1の伝送電力と、ランダムアクセスプリアンブルがマッピングされる物理ランダムアクセスチャネル(physical random access channel:PRACH)の伝送のためにスケジューリングされた第2の伝送電力とに基づいて推定余剰電力(estimated power headroom)を計算し、前記推定余剰電力と臨界電力とを比較し、電力割当優先順位に基づいて前記第1の伝送電力と前記第2の伝送電力とを調整する電力調整部と、
前記推定余剰電力が前記臨界電力より小さい場合、前記調整された第1の伝送電力と前記調整された第2の伝送電力とによって前記アップリンク信号及び前記PRACHを同時に伝送する、または、前記電力割当優先順位に基づいて前記アップリンク信号及び前記PRACHのうちいずれか1つを選択的に伝送する伝送部と、
を備えることを特徴とする端末。 - 前記電力調整部は、
前記PRACHが前記アップリンク信号より優先順位が高い場合、前記第1の伝送電力を減少させることを含むことを特徴とする請求項10に記載の端末。 - 前記信号生成部は、
サウンディング基準信号(sounding reference signal:SRS)を前記アップリンク信号で生成することを特徴とする請求項11に記載の端末。 - 前記信号生成部は、
物理アップリンク共用チャネル(physical uplink shared channel:PUSCH)を前記アップリンク信号で生成することを特徴とする請求項11に記載の端末。 - 前記電力調整部は、
前記アップリンク信号が前記PRACHより優先順位が高い場合、前記第2の伝送電力を減少させることを含むことを特徴とする請求項10に記載の端末。 - 前記信号生成部は、
物理アップリンク制御チャネル(physical uplink control channel:PUCCH)を前記アップリンク信号で生成することを特徴とする請求項14に記載の端末。 - 前記信号生成部は、
ACK/NACK信号、チャネル品質情報(channel quality information:CQI)、及びランク指示子(rank indicator)のうち、少なくとも1つを含むPUSCHを前記アップリンク信号で生成することを特徴とする請求項14に記載の端末。 - 前記電力調整部は、
前記臨界電力を0dBに設定することを特徴とする請求項10に記載の端末。 - 前記推定余剰電力が前記臨界電力より小さい場合、
前記信号生成部は、前記推定余剰電力の報告をトリガリング(triggering)することをさらに含むことを特徴とする請求項10に記載の端末。
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PCT/KR2012/009177 WO2013073787A1 (ko) | 2011-11-15 | 2012-11-02 | 다중 요소 반송파 시스템에서 상향링크 전송전력의 제어장치 및 방법 |
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US20150319703A1 (en) | 2015-11-05 |
WO2013073787A1 (ko) | 2013-05-23 |
EP2782405A4 (en) | 2015-04-29 |
JP2014535236A (ja) | 2014-12-25 |
US10945217B2 (en) | 2021-03-09 |
US20190200301A1 (en) | 2019-06-27 |
US9313743B2 (en) | 2016-04-12 |
US11606757B2 (en) | 2023-03-14 |
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