JP6378440B2 - 非免許帯域をサポートする無線接続システムにおいてチャネル状態情報を報告する方法及びこれをサポートする装置 - Google Patents
非免許帯域をサポートする無線接続システムにおいてチャネル状態情報を報告する方法及びこれをサポートする装置 Download PDFInfo
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- H—ELECTRICITY
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- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0037—Inter-user or inter-terminal allocation
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2602—Signal structure
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- 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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- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- 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
- H04B7/0621—Feedback content
- H04B7/0626—Channel coefficients, e.g. channel state information [CSI]
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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
- H04L1/0027—Scheduling of signalling, e.g. occurrence thereof
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- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1867—Arrangements specially adapted for the transmitter end
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- H04L25/0202—Channel estimation
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- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/06—Management of faults, events, alarms or notifications
- H04L41/0631—Management of faults, events, alarms or notifications using root cause analysis; using analysis of correlation between notifications, alarms or events based on decision criteria, e.g. hierarchy, tree or time analysis
- H04L41/064—Management of faults, events, alarms or notifications using root cause analysis; using analysis of correlation between notifications, alarms or events based on decision criteria, e.g. hierarchy, tree or time analysis involving time analysis
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- H04L5/0003—Two-dimensional division
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- 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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- H04L5/0012—Hopping in multicarrier systems
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- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
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- H04L5/0057—Physical resource allocation for CQI
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- H04L5/00—Arrangements affording multiple use of the transmission path
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- H04L5/00—Arrangements affording multiple use of the transmission path
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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
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- H04B7/0686—Hybrid systems, i.e. switching and simultaneous transmission
- H04B7/0689—Hybrid systems, i.e. switching and simultaneous transmission using different transmission schemes, at least one of them being a diversity transmission scheme
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2602—Signal structure
- H04L27/2603—Signal structure ensuring backward compatibility with legacy system
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- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
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Description
の長さを有し、
の均等な長さを有し、0から19までのインデックスが与えられた20個のスロットで構成される。1サブフレームは、2個の連続したスロットと定義され、i番目のサブフレームは、2i及び2i+1に該当するスロットで構成される。すなわち、無線フレーム(radio frame)は、10個のサブフレーム(subframe)で構成される。1サブフレームを送信するのにかかる時間をTTI(transmission time interval)という。ここで、Tsはサンプリング時間を表し、Ts=1/(15kHz×2048)=3.2552×10−8(約33ns)と表示される。スロットは、時間領域で複数のOFDMシンボル又はSC−FDMAシンボルを含み、周波数領域で複数のリソースブロック(Resource Block)を含む。
の長さを有し、
の長さを有する2個のハーフフレーム(half−frame)で構成される。各ハーフフレームは、
の長さを有する5個のサブフレームで構成される。i番目のサブフレームは、2i及び2i+1に該当する各
の長さを有する2個のスロットで構成される。ここで、Tsは、サンプリング時間を表し、Ts=1/(15kHz×2048)=3.2552×10−8(約33ns)で表示される。
とすれば、システムで利用可能なCCEの個数は
であり、各CCEは0から
までのインデックスを有する。
を満たすCCEから始まってもよい。
(2)送信モード2:送信ダイバーシティ(Transmit Diversity)
(3)送信モード3:開ループ空間多重化(Open−loop Spatial Multiplexing)
(4)送信モード4:閉ループ空間多重化(Closed−loop Spatial Multiplexing)
(5)送信モード5:多重ユーザMIMO
(6)送信モード6:閉ループランク=1プリコーディング
(7)送信モード7:コードブックに基づかない、単一レイヤ送信をサポートするプリコーディング
(8)送信モード8:コードブックに基づかない、2個までのレイヤをサポートするプリコーディング
(9)送信モード9:コードブックに基づかない、8個までのレイヤをサポートするプリコーディング
(10)送信モード10:コードブックに基づかない、CoMPのために用いられる、8個までのレイヤをサポートするプリコーディング
を有する複数のCCEで構成される。ここで、
は、k番目のサブフレームの制御領域内におけるCCEの総数を意味する。端末は、サブフレームごとに複数のPDCCHをモニタする。ここで、モニタリングとは、端末がモニタされるPDCCHフォーマットによってPDCCHのそれぞれのデコーディングを試みることをいう。
は、集合レベル
によるPDCCH候補セットを意味する。サーチスペースのPDCCH候補セット
によるCCEは、次式1によって決定することができる。
は、サーチスペースでモニタするためのCCE集合レベルLによるPDCCH候補の個数を表し、
である。
は、PDCCHにおいて各PDCCH候補で個別CCEを指定するインデックスであり、
である。
であり、
は、無線フレーム内でのスロットインデックスを表す。
は0に設定される。一方、端末特定サーチスペースの場合、集合レベルLに対して
は式2のように定義される。
であり、
はRNTI値を表す。また、
であり、
である。
値を示す。この際、実際の値(Actual Value)は
値*2[dB]に設定される。また、PMI−RIレポートIEはPMI/IR報告が構成されるか否かを示す。EUTRANは伝送モードがTM8、9又は10に設定された場合にのみPMI−RIレポートIEを構成する。
Claims (12)
- 非免許帯域をサポートする無線接続システムにおいて端末がチャネル状態情報(CSI)を報告する方法であって、
前記非免許帯域をサポートする非免許帯域セル(Uセル)に設定された下りリンクバーストを所定のサブフレームの分だけ受信する段階と、
前記下りリンクバーストに対する前記CSIを測定する段階と、
測定した前記CSIを基地局に報告する段階と、を含み、
前記端末は、前記下りリンクバーストに部分サブフレーム(pSF)が含まれる場合、前記pSFを前記CSI測定のための有効な下りリンクサブフレームと見なさず、
pSFは一般サブフレームより小さい大きさに構成される、CSI報告方法。 - 前記pSFに対してはセルフキャリアスケジューリング方式でスケジュールされ、
前記下りリンクバーストに含まれた前記一般サブフレームはクロスキャリアスケジューリング方式でスケジュールされる、請求項1に記載のCSI報告方法。 - 前記CSI報告は前記基地局が免許帯域に構成されるプライマリーセル(Pセル)を介して要請した場合に遂行され、前記CSIは前記Pセルを介して報告される、請求項1に記載のCSI報告方法。
- 前記CSI報告は前記基地局が前記Uセルを介して要請した場合に遂行され、前記CSIは前記Uセルを介して報告される、請求項1に記載のCSI報告方法。
- 前記CSI報告は免許帯域に構成されるPセルを介して周期的に行われる、請求項1に記載のCSI報告方法。
- 前記pSFが有効なサブフレームと見なされない場合、
前記pSFには前記CSIを測定するための参照リソースが割り当てられず、前記端末は、前記CSI測定時、前記下りリンクバーストに含まれた完全なサブフレームに対してのみCSIを測定する、請求項1に記載のCSI報告方法。 - 非免許帯域をサポートする無線接続システムにおいてチャネル状態情報(CSI)を報告する端末であって、
受信機と、
送信機と、
前記CSI報告をサポートするために構成されたプロセッサと、を含み、
前記プロセッサは、
前記受信機を制御して前記非免許帯域をサポートする非免許帯域セル(Uセル)に設定された下りリンクバーストの所定数のサブフレームを受信し、
前記下りリンクバーストに対する前記CSIを測定し、
前記送信機を制御して測定した前記CSIを基地局に報告するように構成され、
前記プロセッサは、前記下りリンクバーストに部分サブフレーム(pSF)が含まれる場合、前記pSFを前記CSI測定のための有効な下りリンクサブフレームと見なさず、
pSFは一般サブフレームより小さい大きさに構成される、端末。 - 前記CSI報告は前記基地局が免許帯域に構成されるプライマリーセル(Pセル)を介して要請した場合に遂行され、前記CSIは前記Pセルを介して報告される、請求項7に記載の端末。
- 前記CSI報告は前記基地局が前記Uセルを介して要請した場合に遂行され、前記CSIは前記Uセルを介して報告される、請求項7に記載の端末。
- 前記CSI報告は免許帯域に構成されるPセルを介して周期的に行われる、請求項7に記載の端末。
- 前記pSFが有効なサブフレームと見なされない場合、
前記pSFには前記CSIを測定するための参照リソースが割り当てられず、前記端末は、前記CSI測定時、前記下りリンクバーストに含まれた完全なサブフレームに対してのみCSIを測定する、請求項7に記載の端末。 - 前記pSFに対してはセルフキャリアスケジューリング方式でスケジュールされ、
前記下りリンクバーストに含まれた前記一般サブフレームはクロスキャリアスケジューリング方式でスケジュールされる、請求項7に記載の端末。
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