JP7008093B2 - 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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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、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。
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UE(user equipment)がCSI(channel state information)を報告する方法であって、
前記非免許帯域内で下りリンクバーストを受信する段階と、
前記下りリンクバーストに対するCSI-RS(channel state information reference signal)を測定する段階と、
前記測定されたCSI-RSのCQI(channel quality indicator)値をBS(base station)に報告する段階と、を含み、
前記UEは、前記測定されたCSI-RSの前記CQI値を報告するために、部分サブフレームの前記CQI値を除き、前記下りリンクバーストの完全なサブフレーム内で測定された前記CQI値を計算するように構成され、
前記部分サブフレームは、サブフレーム内に含まれる、占有されていない少なくとも一つの初めのOFDM(orthogonal frequency divisional multiplexing)シンボルを除いた残りのOFDMシンボルとして構成され、
前記完全なサブフレームは、すべてのOFDMシンボルが占有されているサブフレームであり、
前記部分サブフレームの長さは、前記完全なサブフレームの長さより短い、方法。 - 前記部分サブフレームは、セルフキャリアスケジューリングでスケジュールされ、
前記完全なサブフレームは、クロスキャリアスケジューリングでスケジュールされる、請求項1に記載の方法。 - 前記CSIを報告するための要求を前記非免許帯域内で受信する段階をさらに含み、
前記CQIは、前記要求に応じて、前記非免許帯域内で報告される、請求項1又は2に記載の方法。 - 前記CSIを報告するための要求を免許帯域内で受信する段階をさらに含み、
前記CQIは、前記要求に応じて前記免許帯域内で報告される、請求項1~3のいずれか一項に記載の方法。 - 前記CQIは、免許帯域内で周期的に報告される、請求項1~4のいずれか一項に記載の方法。
- 非免許帯域をサポートする無線接続システムにおいてCSI(channel state information)を報告するUE(user equipment)であって、
メモリと、
前記メモリと連結された少なくとも一つのプロセッサと、を含み、
前記少なくとも一つのプロセッサは、
前記非免許帯域内で下りリンクバーストを受信し、
前記下りリンクバーストに対するCSI-RS(channel state information reference signal)を測定し、
前記測定されたCSI-RSのCQI(channel quality indicator)値をBS(base station)に報告する、ように構成され、
前記少なくとも一つのプロセッサは、前記測定されたCSI-RSの前記CQI値を報告するために、部分サブフレームの前記CQI値を除き、前記下りリンクバーストの完全なサブフレーム内で測定された前記CQI値を計算するようにさらに構成され、
前記部分サブフレームは、サブフレーム内に含まれる、占有されていない少なくとも一つの初めのOFDM(orthogonal frequency divisional multiplexing)シンボルを除いた残りのOFDMシンボルとして構成され、
前記完全なサブフレームは、すべてのOFDMシンボルが占有されているサブフレームであり、
前記部分サブフレームの長さは、前記完全なサブフレームの長さより短い、UE。 - 前記部分サブフレームは、セルフキャリアスケジューリングでスケジュールされ、
前記完全なサブフレームは、クロスキャリアスケジューリングでスケジュールされる、請求項6に記載のUE。 - 前記少なくとも一つのプロセッサは、前記CSIを報告するための要求を前記非免許帯域内で受信するようにさらに構成され、
前記CQIは、前記要求に応じて、前記非免許帯域内で報告される、請求項6又は7に記載のUE。 - 前記少なくとも一つのプロセッサは、前記CSIを報告するための要求を免許帯域内で受信するようにさらに構成され、
前記CQIは、前記要求に応じて前記免許帯域内で報告される、請求項6~8のいずれか一項に記載のUE。 - 前記CQIは、免許帯域内で周期的に報告される、請求項6~9のいずれか一項に記載のUE。
- 非免許帯域をサポートする無線接続システムにおいてBS(base station)がCSI(channel state information)を受信する方法であって、
前記非免許帯域内で下りリンクバーストをUE(user equipment)に送信する段階と、
前記下りリンクバーストに対するCSI-RS(channel state information reference signal)のCQI(channel quality indicator)値を前記UEから受信する段階と、を含み、
前記CSI-RSの前記CQI値のために、前記CQI値は、部分サブフレームの前記CQI値が計算されることを除き、前記下りリンクバーストの完全なサブフレーム内で測定され、
前記部分サブフレームは、サブフレーム内に含まれる、占有されていない少なくとも一つの初めのOFDM(orthogonal frequency divisional multiplexing)シンボルを除いた残りのOFDMシンボルとして構成され、
前記完全なサブフレームは、すべてのOFDMシンボルが占有されているサブフレームであり、
前記部分サブフレームの長さは、前記完全なサブフレームの長さより短い、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CSI(channel state information)を受信するBS(base station)であって、
メモリと、
前記メモリと連結された少なくとも一つのプロセッサと、を含み、
前記少なくとも一つのプロセッサは、
前記非免許帯域内で下りリンクバーストをUE(user equipment)に送信し、
前記下りリンクバーストに対するCSI-RS(channel state information reference signal)のCQI(channel quality indicator)値を前記UEから受信する、ように構成され、
前記CSI-RSの前記CQI値のために、前記CQI値は、部分サブフレームの前記CQI値が計算されることを除き、前記下りリンクバーストの完全なサブフレーム内で測定され、
前記部分サブフレームは、サブフレーム内に含まれる、占有されていない少なくとも一つの初めのOFDM(orthogonal frequency divisional multiplexing)シンボルを除いた残りのOFDMシンボルとして構成され、
前記完全なサブフレームは、すべてのOFDMシンボルが占有されているサブフレームであり、
前記部分サブフレームの長さは、前記完全なサブフレームの長さより短い、BS。
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