JP2013520131A - 無線lanシステムではリンク適応に基づいて、チャネル情報を報告する方法とそれをサポートするデバイス - Google Patents
無線lanシステムではリンク適応に基づいて、チャネル情報を報告する方法とそれをサポートするデバイス Download PDFInfo
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- 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
- H04B7/0613—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
- 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
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Abstract
【解決手段】前記方法は、MCS(Modulation and Coding Scheme)フィードバックを要求するためのデータブロックを要求STAから受信し、データブロックは、データフィールド及びデータフィールド内の少なくとも一つの空間ストリーム個数を指示するストリーム指示子(stream indicator)を含み;データブロックに基づいてMCSフィードバックを決定し;及び、MCSフィードバックを要求STAに送信すること;を含む。MCSフィードバックは、MCS及び少なくとも一つの推薦空間ストリーム個数を指示する推薦ストリーム指示子を含み、MCSフィードバック内の少なくとも一つの推薦空間ストリームの個数は、データブロック内の少なくとも一つの空間ストリームの個数より同じ、或いは小さい。
【選択図】図9
Description
Claims (9)
- 無線LANシステムにおける応答ステーション(station;STA)により実行されるチャネル情報報告方法において、
前記方法は、MCS(Modulation and Coding Scheme)フィードバックを要求するためのデータブロックを要求STAから受信し、前記データブロックは、データフィールド及び前記データフィールド内の少なくとも一つの空間ストリーム個数を指示するストリーム指示子(stream indicator)を含み;
前記データブロックに基づいて前記MCSフィードバックを決定し;及び、
前記MCSフィードバックを前記要求STAに送信すること;を含み、
前記MCSフィードバックは、推薦MCS及び少なくとも一つの推薦空間ストリーム個数を指示する推薦ストリーム指示子を含み、
前記MCSフィードバック内の前記少なくとも一つの推薦空間ストリームの個数は、前記データブロック内の前記少なくとも一つの空間ストリームの個数より同じ、或いは小さいことを特徴とするチャネル情報報告方法。 - 前記MCSフィードバック内の前記少なくとも一つの推薦空間ストリームの個数が前記データブロック内の前記少なくとも一つの空間ストリームの個数より小さい場合、前記少なくとも一つの推薦空間ストリームは、前記データブロックの前記少なくとも一つの空間ストリームのうち少なくとも一つの先順位空間ストリームであるという仮定下に、前記推薦MCSが推定されることを特徴とする請求項1に記載のチャネル情報報告方法。
- 前記MCSフィードバックは、前記データフィールドの送信のために使われた帯域幅及び前記データフィールドに適用されたコーディング技法に基づいて決定されることを特徴とする請求項2に記載のチャネル情報報告方法。
- 前記データブロックは、前記帯域幅を指示するチャネル帯域幅指示子;及び、前記コーディング技法を指示するコーディング技法指示子;をさらに含むことを特徴とする請求項3に記載のチャネル情報報告方法。
- 前記データブロックは、前記MCSフィードバックを要求するMRQ(MCS request)指示子をさらに含むことを特徴とする請求項4に記載のチャネル情報報告方法。
- 前記MRQ指示子は、1ビットフィールドで具現されることを特徴とする請求項5に記載のチャネル情報報告方法。
- 前記データブロックは、PPDU(PLCP(Physical Layer Convergence Procedure)Protocol Data Unit)であることを特徴とする請求項6に記載のチャネル情報報告方法。
- 前記データフィールドは、PSDU(PLCP Service Data Unit)を含み、及び前記MRQ指示子は、前記PSDUに含まれることを特徴とする請求項7に記載のチャネル情報報告方法。
- 無線信号を送信及び受信するトランシーバ(transceiver);及び、
前記トランシーバと機能的に結合されて動作するプロセッサ(processor);を含み、
前記プロセッサは、
MCS(Modulationand Coding Scheme)フィードバックを要求するためのデータブロックを要求STAから受信し、前記データブロックは、データフィールド及び前記データフィールド内の少なくとも一つの空間ストリーム個数を指示するストリーム指示子(stream indicator)を含み;
前記データブロックに基づいて前記MCSフィードバックを決定し;及び、
前記MCSフィードバックを前記要求STAに送信すること;を実行するように設定され、
前記MCSフィードバックは、推薦MCS及び少なくとも一つの推薦空間ストリーム個数を指示する推薦ストリーム指示子を含み、
前記MCSフィードバック内の前記少なくとも一つの推薦空間ストリームの個数は、前記データブロック内の前記少なくとも一つの空間ストリームの個数より同じ、或いは小さいことを特徴とする無線装置。
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PCT/KR2011/008993 WO2012070872A1 (en) | 2010-11-26 | 2011-11-23 | Method for reporting channel information based on link adaptation in wireless local area network and the apparatus for the same |
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EP (2) | EP2643935B1 (ja) |
JP (1) | JP5690850B2 (ja) |
KR (1) | KR101424368B1 (ja) |
CN (1) | CN102696182B (ja) |
AU (1) | AU2011304258B2 (ja) |
CA (1) | CA2772468C (ja) |
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CN102696182A (zh) | 2012-09-26 |
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US9520964B2 (en) | 2016-12-13 |
CA2772468A1 (en) | 2012-05-26 |
EP3582404B1 (en) | 2021-06-16 |
US20120269183A1 (en) | 2012-10-25 |
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JP5690850B2 (ja) | 2015-03-25 |
EP3582404A1 (en) | 2019-12-18 |
US20140293916A1 (en) | 2014-10-02 |
WO2012070872A1 (en) | 2012-05-31 |
EP2643935B1 (en) | 2019-09-11 |
CN102696182B (zh) | 2015-08-26 |
AU2011304258B2 (en) | 2014-02-13 |
US9258799B2 (en) | 2016-02-09 |
US8787341B2 (en) | 2014-07-22 |
KR20120117881A (ko) | 2012-10-24 |
US20160127076A1 (en) | 2016-05-05 |
AU2011304258A1 (en) | 2012-06-14 |
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