JP2015100114A - 無線装置、無線システム、制御方法及びプログラム - Google Patents
無線装置、無線システム、制御方法及びプログラム Download PDFInfo
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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
- H04L1/0026—Transmission of channel quality indication
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- H04B7/0615—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 simultaneous transmission of weighted versions of same signal
- H04B7/0619—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 simultaneous transmission of weighted versions of same signal using feedback from receiving side
- H04B7/0621—Feedback content
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- H04B7/0615—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 simultaneous transmission of weighted versions of same signal
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- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
- H04L5/0051—Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal
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- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
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- H—ELECTRICITY
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- H04L5/00—Arrangements affording multiple use of the transmission path
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- Time-Division Multiplex Systems (AREA)
- Noise Elimination (AREA)
Abstract
Description
1又は複数のチャネル品質指標(CQI)に対応している一又は複数のチャネル品質指標(CQI)基準信号を生成する生成手段と、
前記一又は複数のCQI基準信号を他の信号との衝突を避けることが可能なサブフレーム内のシンボルにマッピングして第1の無線装置に送信する送信手段と、
前記一又は複数のCQI基準信号に基づいて決定された報告を前記第1の無線装置から受信する受信手段と、を有することを特徴とする。
図5は、セル固有のサブフレームオフセットSFoffset 510とCQI−RS送信周期、TCQI-RS 505との使用を示している一連のサブフレーム500の模式図である。TCQI-RS 505は、LTE Rel−8についてのCQI/PMI報告周期と同じ、つまり、周波数分割2重化(FDD)については、2ms、5ms、10ms、40ms、80ms、および160msであり、時間分割2重化(TDD)については、1ms、5ms、10ms、40ms、80ms、および160msである。しかし、TCQI-RS 505はセル固有であるのに対して、CQI/PMI報告周期はUE固有であり、TCQI−RS 505の構成とCQI/PMI報告周期とは独立している。実際には、CQI/PMI報告周期は一般的にはTCQI-RS 505以上である。
kと表記されることもあるCQI−RS副帯域は、LTE Rel−8用のCQI報告副帯域と同様に定義される。CQI−RS副帯域サイズつまりCQI−RSを有しているリソースブロックの総数は、LTE Rel−8についてのCQI報告副帯域サイズと同様に、1つのコンポーネントキャリヤについての装置帯域に基づいて求めることができる。具体的には、CQI−RS副帯域サイズは、表1に示しているように求められる。
710の使用を示しているサブフレーム700(各副帯域715に8つのリソースブロックを有している)の帯域幅(20MHz)の模式図を示している。各副帯域715はCQI−RSを含んでいるリソースブロック705を有している(副帯域サイズ=8つのリソースブロック)。CQI−RSを有しているリソースブロックの正確な位置は、パラメータRBoffset 710によって求めることができる。RBoffsetは0からk−1の範囲である。
Claims (6)
- 1又は複数のチャネル品質指標(CQI)に対応している一又は複数のチャネル品質指標(CQI)基準信号を生成する生成手段と、
前記一又は複数のCQI基準信号を他の信号との衝突を避けることが可能なサブフレーム内のシンボルにマッピングして第1の無線装置に送信する送信手段と、
前記一又は複数のCQI基準信号に基づいて決定された報告を前記第1の無線装置から受信する受信手段と、を有することを特徴とする無線装置。 - 前記サブフレームはリソースブロックからなり、前記リソースブロック内には、2つの前記CQI基準信号のリソース要素が存在し、2つの前記CQI基準信号のリソース要素は、各レイヤに設けられている、ことを特徴とする請求項1記載の無線装置。
- 前記CQI基準信号は、前記リソースブロックのサブキャリアにわたって一様に分散している、ことを特徴とする請求項1または2記載の無線装置。
- 第1の無線装置と、第2の無線装置と、を有する無線システムであって、
前記第1の無線装置は、
1又は複数のチャネル品質指標(CQI)に対応している一又は複数のチャネル品質指標(CQI)基準信号を生成する生成手段と、
前記一又は複数のCQI基準信号を他の信号との衝突を避けることが可能なサブフレーム内のシンボルにマッピングして前記第2の無線装置に送信する送信手段と、
前記一又は複数のCQI基準信号に基づいて決定された報告を前記第2の無線装置から受信する受信手段と、を有することを特徴とする無線システム。 - 無線装置で行う制御方法であって、
1又は複数のチャネル品質指標(CQI)に対応している一又は複数のチャネル品質指標(CQI)基準信号を生成する工程と、
前記一又は複数のCQI基準信号を他の信号との衝突を避けることが可能なサブフレーム内のシンボルにマッピングして第1の無線装置に送信する工程と、
前記一又は複数のCQI基準信号に基づいて決定された報告を前記第1の無線装置から受信する工程と、を含むことを特徴とする制御方法。 - 1又は複数のチャネル品質指標(CQI)に対応している一又は複数のチャネル品質指標(CQI)基準信号を生成する処理と、
前記一又は複数のCQI基準信号を他の信号との衝突を避けることが可能なサブフレーム内のシンボルにマッピングして第1の無線装置に送信する処理と、
前記一又は複数のCQI基準信号に基づいて決定された報告を前記第1の無線装置から受信する処理と、をコンピュータに実行させることを特徴とするプログラム。
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| AU2009901196A AU2009901196A0 (en) | 2009-03-19 | Improved channel quality indicator method | |
| AU2009901196 | 2009-03-19 |
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| JP2012135765A Expired - Fee Related JP5077499B1 (ja) | 2009-03-19 | 2012-06-15 | 改良されたチャネル品質指標の方法 |
| JP2012170206A Expired - Fee Related JP5110220B1 (ja) | 2009-03-19 | 2012-07-31 | 改良されたチャネル品質指標の方法 |
| JP2013208237A Expired - Fee Related JP5677542B2 (ja) | 2009-03-19 | 2013-10-03 | 改良されたチャネル品質指標の方法 |
| JP2014264971A Expired - Fee Related JP5944479B2 (ja) | 2009-03-19 | 2014-12-26 | 無線装置、無線システム、制御方法及びプログラム |
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| JP2012135765A Expired - Fee Related JP5077499B1 (ja) | 2009-03-19 | 2012-06-15 | 改良されたチャネル品質指標の方法 |
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| CN103178929A (zh) * | 2011-12-23 | 2013-06-26 | 中兴通讯股份有限公司 | 信道状态信息的反馈方法及装置 |
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