JP2012235486A - 通信システムにおける自動ユーザー端末送信電力制御 - Google Patents
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- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
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- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
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- H04L1/00—Arrangements for detecting or preventing errors in the information received
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- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
- H04L5/0057—Physical resource allocation for CQI
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- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/38—TPC being performed in particular situations
- H04W52/48—TPC being performed in particular situations during retransmission after error or non-acknowledgment
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- H—ELECTRICITY
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- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
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- H—ELECTRICITY
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- H04L5/00—Arrangements affording multiple use of the transmission path
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- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
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- H—ELECTRICITY
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- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/06—TPC algorithms
- H04W52/14—Separate analysis of uplink or downlink
- H04W52/146—Uplink power control
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04W72/00—Local resource management
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Abstract
【解決手段】データ信号を伝送シンボル内の複数の周波数リソースユニットで構成される第1のREセットを通じて受信するステップと、データ信号を伝送シンボル内の複数の周波数リソースユニットで構成される第2のREセットを通じて受信するステップと、を有し、データ信号の電力レベルは、データ信号を伝送するために使用される周波数−時間リソースのサイズによって調整され、データ信号が第1のREセットを通じて受信されるとき、データ信号は第1の電力レベルで受信され、データ信号が第2のREセットを通じて受信されるとき、データ信号は第2の電力レベルで受信され、第2の電力レベルは第1の電力レベルより高く、第2のREセットは第1のREセットのサブセットである。
【選択図】図4
Description
の伝送シンボルをさらに含み、各伝送シンボル130は、チャンネル伝播効果(channel propagation effect)による干渉を軽減するためのCP(Cyclic Prefix)をさらに含む。2個のスロットのPUSCH伝送は、動作帯域幅(BandWidth:BW)での同一の部分で、あるいは2個の異なる部分で行われることができる。RS(Reference Signal)は、各スロット140の中間(middle)に位置した伝送シンボルで、かつ、データ信号と同一の帯域幅で伝送される。このRSは、主に、UCI又はデータ信号(DM RS)のコヒーレント復調(coherent demodulation)を可能にするチャンネル推定を提供するために使用される。PUSCH伝送BWは、リソースブロック(Resouce Block:RB)と呼ばれる周波数リソースユニットを含む。典型的な実施形態では、それぞれのRBは
のリソース要素(Resource Element:RE)または副搬送波を含み、UEには、PUSCH伝送のためのMPUSCH個の連続したRB150が割り当てられる。
として計算される。ここで、Kは定数を、TBSはTBのサイズを、及び
は、DM RS伝送に使用される、REを除いたサブフレーム当りのREの個数(図1に例示された構成では、DM RS伝送に、スロット当り一個の伝送シンボルが使用される)を、それぞれ表す。したがって、PUSCH送信電力は、UCI又はSRSの存在有無に関係なしに、非適応的HARQ再伝送で同一に維持される。
Claims (14)
- 基地局でユーザー端末から、リソース要素(Resource Element:RE)のセットを通じて伝送されたデータ信号を受信する方法であって、
データ信号を伝送シンボル内の複数の周波数リソースユニットで構成される第1のREセットを通じて受信するステップと、
前記データ信号を前記伝送シンボル内の複数の周波数リソースユニットで構成される第2のREセットを通じて受信するステップと、を有し、
ここで、前記データ信号の電力レベルは、前記データ信号を伝送するために使用される周波数−時間リソースのサイズによって調整され、
前記データ信号が前記第1のREセットを通じて受信されるとき、前記データ信号は第1の電力レベルで受信され、
前記データ信号が前記第2のREセットを通じて受信されるとき、前記データ信号は第2の電力レベルで受信され、
前記第2の電力レベルは前記第1の電力レベルより高く、前記第2のREセットは前記第1のREセットのサブセットであることを特徴とする方法。 - 前記第1のREセットを通じて受信されるデータ信号は、第1のデータMCSを用いて受信され、前記第2のREセットを通じて受信されるデータ信号は、第2のデータMCSを用いて受信され、前記第2のデータMCSは、前記第1のデータMCSより高いスペクトル効率を有することを特徴とする請求項1に記載の方法。
- 前記データ信号が前記第2のREセットを通じて受信されるとき、制御信号を、前記第1のREセットに含まれ、前記第2のREセットには含まれないREを通じて受信するステップをさらに含むことを特徴とする請求項1に記載の方法。
- 前記制御信号は、肯定応答信号、チャンネル品質インジケータ信号、プリコーディングマトリクスインジケータ信号、及びランクインジケータ信号のうち少なくとも一つを含むことを特徴とする請求項3に記載の方法。
- 前記制御信号はサウンディング基準信号であることを特徴とする請求項3に記載の方法。
- 前記第1の電力レベルは前記第1のREセットのサイズに基づき、前記第2の電力レベルは前記第2のREセットのサイズに基づくことを特徴とする請求項1に記載の方法。
- 前記データ信号は、
前記第1のREセットを通じて受信されるとき、HARQ初期伝送とそれに関連したHARQ再伝送のうちいずれか一つを含み、
前記第2のREセットを通じて受信されるとき、HARQ初期伝送とそれに関連したHARQ再伝送のうち他の一つを含むことを特徴とする請求項1に記載の方法。 - ユーザー端末から、REセットを通じて伝送されたデータ信号を受信する基地局内の装置であって、
データ信号を伝送シンボル内の複数の周波数リソースユニットで構成される第1のREセットを通じて受信し、前記データ信号を前記伝送シンボル内の複数の周波数リソースユニットで構成される第2のREセットを通じて受信する受信部を含み、
ここで、前記データ信号の電力レベルは、前記データ信号を伝送するために使用される周波数−時間リソースのサイズによって調整され、
前記データ信号が前記第1のREセットを通じて受信されるとき、前記データ信号は第1の電力レベルで受信され、
前記データ信号が前記第2のREセットを通じて受信されるとき、前記データ信号は第2の電力レベルで受信され、
前記第2の電力レベルは前記第1の電力レベルより高く、前記第2のREセットは前記第1のREセットのサブセットであることを特徴とする基地局内の装置。 - 前記第1のREセットを通じて受信されるデータ信号は、第1のデータMCSを用いて受信され、前記第2のREセットを通じて受信されるデータ信号は、第2のデータMCSを用いて受信され、前記第2のデータMCSは、前記第1のデータMCSより高いスペクトル効率を有することを特徴とする請求項8に記載の基地局内の装置。
- 前記データ信号が前記第2のREセットを通じて受信されるとき、制御信号が、前記第1のREセットに含まれ、前記第2のREセットには含まれないREで受信されることを特徴とする請求項8に記載の基地局内の装置。
- 前記制御信号は、肯定応答信号、チャンネル品質インジケータ信号、プリコーディングマトリクスインジケータ信号、及びランクインジケータ信号のうち少なくとも一つであることを特徴とする請求項10に記載の基地局内の装置。
- 前記制御信号はサウンディング基準信号であることを特徴とする請求項10に記載の基地局内の装置。
- 前記第1の電力レベルは前記第1のREセットのサイズに基づき、前記第2の電力レベルは前記第2のREセットのサイズに基づくことを特徴とする請求項8に記載の基地局内の装置。
- 前記データ信号は、
前記第1のREセットを通じて受信されるとき、HARQ初期伝送とそれに関連したHARQ再伝送のうちいずれか一つを含み、
前記第2のREセットを通じて受信されるとき、HARQ初期伝送とそれに関連したHARQ再伝送のうち他の一つを含むことを特徴とする請求項8に記載の基地局内の装置。
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