JP6240753B2 - 時分割複信(tdd)アップリンク−ダウンリンク(ul−dl)再構成 - Google Patents
時分割複信(tdd)アップリンク−ダウンリンク(ul−dl)再構成 Download PDFInfo
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Description
本願は、2013年6月28日に出願され、事件整理番号P57460Zを有する米国仮特許出願第61/841,230号に対する優先権を主張するとともに、全ての目的のために、その全体の明細書は、その全体の参照によってここに組み込まれている。本願は、同様に、2014年3月26日に出願され、事件整理番号P63587を有する米国特許本出願第14/226,264号に対する優先権を主張するとともに、全ての目的のために、その全体の明細書は、その全体の参照によってここに組み込まれている。
技術の実施例の最初の概観が下記で提供され、それから、具体的な技術の実施例があとで更に詳細に説明される。この最初の要約は、読み手が更に迅速に技術を理解するのを援助することを意図しているが、しかし、技術の重要な特色又は本質的な特徴を特定することを意図していないとともに、権利請求された主題の範囲を限定することを意図していない。
tddConfiglndex=decisionFunction(Ml,M2,...,MN)
ここで、tddConfiglndexは、選択されたUL−DL構成インデックスであり、Miは、セルクラスタ内のeNBの間で交換されたクラスタメトリクスであるとともに、decisionFunctionは、新しいUL−DL構成について決定するためのアルゴリズムである。eNBがクラスタメトリクスの等しい集合を受信し得るので、上述のアルゴリズムは、セルクラスタ内のeNBに対して等しいTDD構成インデックスを計算することができ、したがって伝送方向を調整することができる。
UL伝送方向及びDL伝送方向におけるバッファサイズ、及びパケット遅延のうちの1つ又は複数を含む。
Claims (16)
- 異種ネットワーク(HetNet)において時分割複信(TDD)アップリンク−ダウンリンク(UL−DL)再構成を実行するように動作可能な進化型NodeB(eNB)であって、当該eNBが、
前記HetNetのセルクラスタ内の、選択された範囲内のバックホール待ち時間を有する複数の進化型NodeB(eNB)に対するクラスタメトリクスを識別し、
前記クラスタメトリクスに一部分基づいて前記セルクラスタ内の前記複数のeNBに対するTDD UL−DL構成インデックスを選択し、
ダウンリンク制御情報(DCI)フォーマットを使用して前記セルクラスタ内に位置する1つ又は複数のユーザ装置(UE)に前記TDD UL−DL構成インデックスを送信し、前記TDD UL−DL構成インデックスがUE固有のプライマリセル(PCell)における物理ダウンリンク制御チャネル(PDCCH)の共通サーチスペース(CSS)で送信される
ように構成されるコンピュータ回路を有する、eNB。 - UE固有の方法における無線リソース制御(RRC)シグナリングを使用して、前記セルクラスタ内の前記1つ又は複数のUEのためのダウンリンク制御情報(DCI)監視サブフレームを構成するように更に構成される、請求項1に記載のコンピュータ回路。
- 前記クラスタメトリクスが、X2インタフェースを介して前記セルクラスタ内の前記複数のeNBの間で交換されるとともに、前記クラスタメトリクスが、前記セルクラスタ内でeNBにより使用されるUL−DL構成、各eNBにより必要とされるDL−ULリソース、UL伝送方向及びDL伝送方向におけるバッファサイズ、及びパケット遅延のうちの1つ又は複数を含む、請求項1に記載のコンピュータ回路。
- 分散された方法で前記セルクラスタ内の前記複数のeNBの間で交換される前記クラスタメトリクスの最小値、平均値、又は最大値に基づいて前記セルクラスタ内の前記複数のeNBに対する前記TDD UL−DL構成インデックスを選択するように更に構成される、請求項1に記載のコンピュータ回路。
- 前記セルクラスタ内の前記複数のeNBの前記バックホール待ち時間に基づくとともに10ミリセカンド(ms)、20ms、40ms、及び80msを含む定義された周期性に従って前記セルクラスタ内の前記複数のeNBに対する前記TDD UL−DL構成インデックスを選択するように更に構成される、請求項1に記載のコンピュータ回路。
- システムフレーム番号(SFN)カウンタを使用して、周期性を法として余りがゼロであるSFNを有する無線フレームを制御し、前記TDD UL−DL構成が前記セルクラスタ内でeNBにより同期的に更新されるように前記TDD UL−DL構成インデックスが前記セルクラスタ内のeNBにより適用されるように更に構成される、請求項1に記載のコンピュータ回路。
- Uuインタフェースを通して前記セルクラスタ内の前記1つ又は複数のUEにTDD UL−DL構成インデックス情報を送信し、前記TDD UL−DL構成インデックス情報がUE固有のRRC構成に応じた各無線フレーム内のサブフレーム番号0、1、5、又は6のうちの1つ又は複数における物理ダウンリンク制御チャネル(PDCCH)により送信されるように更に構成される、請求項1に記載のコンピュータ回路。
- 10サブフレームから80サブフレームまでの予め定義された周期性及び0サブフレームから3サブフレームまでの予め定義されたオフセット値に従って、前記セルクラスタ内の前記1つ又は複数のUEに前記TDD UL−DL構成インデックスを送信するように更に構成される、請求項1に記載のコンピュータ回路。
- 協調マルチポイント(CoMP)シナリオ4における1つ又は複数の送信ポイント(TP)に近接して位置する前記1つ又は複数のUEに前記TDD UL−DL構成インデックスを送信し、前記TDD UL−DL構成インデックスが前記1つ又は複数のTPと関連付けられたトラフィック状態に従って前記1つ又は複数のUEに送信されるように更に構成される、請求項1に記載のコンピュータ回路。
- 協調マルチポイント(CoMP)シナリオ4における1つ又は複数の送信ポイント(TP)に近接して位置する前記1つ又は複数のUEに前記TDD UL−DL構成インデックスを送信し、前記TDD UL−DL構成インデックスがダウンリンクチャネル情報(DCI)の繰り返し伝送の監視のために使用されるDLサブフレームパターンに従って前記1つ又は複数のUEに送信されるように更に構成される、請求項1に記載のコンピュータ回路。
- システム情報ブロックタイプ1(SIB1)ダウンリンク又はスペシャル(DL/S)サブフレームのセットを示すXビットのビットマップに従って、前記セルクラスタ内の前記1つ又は複数のUEに前記TDD UL−DL構成インデックスを送信し、前記1つ又は複数のUEが、前記Xビットのビットマップに従って前記eNBからのダウンリンクチャネル情報(DCI)伝送に関して監視し、“X”がビットマップ文字列の中のビット数を表すとともに、各ビットが特定のSIB1 DL/Sサブフレームを示し、ビット“1”は前記UEが対応するサブフレームにおけるDCI再構成に関して監視することになっていることを示し、ビット“0”は前記UEが対応するサブフレームにおける前記DCI再構成に関して監視しないことになっていることを示すように更に構成される、請求項1に記載のコンピュータ回路。
- 異種ネットワーク(HetNet)において時分割複信(TDD)アップリンク−ダウンリンク(UL−DL)再構成を実行するための方法であって、当該方法が、
前記HetNetのセルクラスタ内の、選択された範囲内のバックホール待ち時間を有する複数のノードに対するクラスタメトリクスを識別するステップと、
前記クラスタメトリクスに一部分基づいて前記セルクラスタ内の前記複数のノードに対するTDD UL−DL構成インデックスを選択するステップと、
ダウンリンク制御情報(DCI)フォーマットを使用して前記セルクラスタ内に位置する1つ又は複数のユーザ装置(UE)に前記TDD UL−DL構成インデックスを送信するステップであって、前記TDD UL−DL構成インデックスがUE固有のプライマリセル(PCell)における物理ダウンリンク制御チャネル(PDCCH)の共通サーチスペース(CSS)で送信される、ステップと
を含む、方法。 - 無線リソース制御(RRC)シグナリングを使用して、前記セルクラスタ内の前記1つ又は複数のUEのためのダウンリンク制御情報(DCI)監視サブフレームを構成するステップであって、前記1つ又は複数のUEがシステム情報ブロックタイプ1(SIB1)に従ってダウンリンクサブフレームにおける前記TDD UL−DL再構成に関して監視する、ステップを更に含む、請求項12に記載の方法。
- 前記クラスタメトリクスの最小値、平均値、又は最大値に基づいて前記セルクラスタ内の前記複数のノードに対する前記TDD UL−DL構成インデックスを選択するステップであって、前記クラスタメトリクスが、X2インタフェースを介して前記セルクラスタ内の前記複数のノードの間で交換されるとともに、前記クラスタメトリクスが、UL−DL構成、DL−ULリソース、UL及びDLにおけるバッファサイズ、及びパケット遅延のうちの1つ又は複数を含む、ステップを更に含む、請求項12に記載の方法。
- システム情報ブロックタイプ1(SIB1)ダウンリンク又はスペシャル(DL/S)サブフレームのセットを示すXビットのビットマップに従って、前記セルクラスタ内の前記1つ又は複数のUEに前記TDD UL−DL構成インデックスを送信するステップであって、前記1つ又は複数のUEが、前記Xビットのビットマップに従って前記ノードからのダウンリンクチャネル情報(DCI)伝送に関して監視し、“X”がビットマップ文字列の中のビット数を表すとともに、各ビットが特定のSIB1 DL/Sサブフレームを示し、ビット“1”は前記UEが対応するサブフレームにおけるDCI再構成に関して監視することになっていることを示し、ビット“0”は前記UEが対応するサブフレームにおける前記DCI再構成に関して監視しないことになっていることを示す、ステップを更に含む、請求項12に記載の方法。
- 前記ノードが、基地局(BS)、NodeB(NB)、進化型NodeB(eNB)、ベースバンドユニット(BBU)、リモート無線ヘッド(RRH)、リモート無線装置(RRE)、又はリモート無線ユニット(RRU)を含むグループの中から選択される、請求項12に記載の方法。
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2014
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