JP7333324B2 - ビーム障害回復を実行するための方法および無線通信装置 - Google Patents
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Description
帯域幅の高まる必要性を対象にして、次世代システムの無線システムは、最大で100GHzの高い動作周波数を採用するであろう。そのような高い動作周波数が使用されると、伝搬損失が高くなる傾向がある。この問題に取組むために、次世代無線通信装置は、ビームアラインメントを実現し十分高いアンテナ利得を得るために、大規模多重入出力(MIMO)技術(たとえば、1つのノードに対して1024個のアンテナ要素)を用いたアンテナアレイおよびビーム形成(BF)訓練技術を採用し得る。
添付の特許請求の範囲では特に本発明の技術の特徴について説明されるが、これらの技術はそれらの目的および利点と共に、添付の図面と併せて以下の詳細な説明から最良に理解され得る。
本開示は一般に、ビーム障害回復を実行するための方法および無線通信装置に向けられている。一実施形態によると、ビーム障害回復リクエストメディアアクセス制御プロトコル制御要素(BFRR MAC CE)は、(たとえば、モバイル無線通信装置から基地局(BS)にといった、無線ネットワークの1つのノードから他のノードに)ビーム障害回復情報を転送するために使用される。BFRR MAC CEは、基準信号(RS)タイプ(すなわち、RSリソースのタイプ)、RSリソースの識別情報、周波数位置の識別情報、たとえば帯域幅部分の識別情報(たとえば、帯域幅部分(BWP)が使用される場合)、およびサービングセルの識別情報、たとえば、セカンダリサービングセルの識別情報のうち1つ以上を含み得る。
事例2:BWPの動作を有する1つのサービングセル。
事例1:BWPの動作を有さない1つのサービングセル。
S0において:ビーム障害が発生すると、たとえば、物理層またはRRC層からビーム障害の表示を受信すると、通信装置502はランダムアクセス手順を開始する。通信装置502はまず、専用RACHリソース(複数可)を有する候補ビームを探そうとする。残念なことに、そのようなビームは見つからない。そのため、通信装置502は、(良い品質を有する、たとえば閾値より大きい品質を有する)SSブロックを代わりに選択して、コンテンションベースビーム障害回復手順を開始する。
レガシーシステムでは、チャネル帯域幅を割当てる場合、チャネル帯域幅は、BSとBSが通信する通信装置のすべてとの双方の帯域幅の送受信に関する。しかしながら、より新しい世代の無線システムについては、異なる通信装置のチャネル帯域幅が同じスペクトル内でサポートされ得る。これは、帯域幅部分(BWP)動作と呼ばれる。BWP動作では、通信装置は、中心周波数調整によるRF適応、帯域幅適応、または両方を、広帯域キャリアで行う。BWPによって、広帯域キャリア内での通信装置帯域幅能力が低下し、帯域幅適応による通信装置の消費電力エネルギーが減少し、通信装置は、広帯域キャリア内の周波数分割多重(FDM)において異なるニューメロロジー(numerologies)を用いることができる。
Claims (10)
- ビーム障害から回復するための無線通信装置のための方法であって、
プライマリセルでのビーム障害の検出に応答して、前記無線通信装置とネットワークノードとの間の無線リンクを回復するための候補ビームを識別することと、
メディアアクセス制御プロトコル制御要素内の前記候補ビームの識別情報を前記ネットワークノードに送信することと、
ランダムアクセス応答でネットワークによって新しい送信用に割当てられたアップリンクリソースで、前記メディアアクセス制御プロトコル制御要素をシグナリングすることとを備え、前記ランダムアクセス応答は、コンテンションベースのランダムアクセス手順内にあり、前記プライマリセルでのビーム障害からの回復が失敗した場合には無線リンク障害を宣言し、
前記ビーム障害が発生した周波数位置の識別情報および前記ビーム障害が発生したサービングセルの識別情報を前記メディアアクセス制御プロトコル制御要素に含めることをさらに備える、方法。 - 応答について前記候補ビームを監視することをさらに備える、請求項1に記載の方法。
- 前記無線通信装置のセル無線ネットワーク一時的識別子(C-RNTI)宛ての物理ダウンリンク制御チャネル(PDCCH)を監視することをさらに備える、請求項1または2に記載の方法。
- 前記候補ビームの前記識別情報は、基準信号リソースの識別情報を含む、請求項1~3のいずれか1項に記載の方法。
- 前記候補ビームは、同期信号またはチャネル状態情報基準信号である、請求項1~4のいずれか1項に記載の方法。
- 前記候補ビームの品質が閾値より大きいという判断に基づいて、前記候補ビームを認定された候補ビームであると識別することをさらに備え、前記閾値は基準信号受信電力閾値であり、前記閾値は基地局から受信される、請求項1~5のいずれか1項に記載の方法。
- 前記無線通信装置は新しい送信用に割当てられたアップリンクリソースを有し、前記方法はさらに、前記アップリンクリソースで前記メディアアクセス制御プロトコル制御要素をシグナリングすることを備える、請求項1~6のいずれか1項に記載の方法。
- 前記無線通信装置は、スケジューリングリクエストを送信するために構成された有効な物理アップリンク制御チャネルリソースを有し、前記方法はさらに、スケジューリングリクエストをトリガすることを備える、請求項1~7のいずれか1項に記載の方法。
- 請求項1~8のいずれか1項に記載の方法を実行するように構成された無線通信装置。
- 請求項1~8のいずれか1項に記載の方法を実行するためのコンピュータ実施可能命令を格納した、非一時的なコンピュータ可読媒体。
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CN111567119A (zh) | 2020-08-21 |
CN111567119B (zh) | 2024-02-13 |
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EP3729901A4 (en) | 2021-07-07 |
JP2021507627A (ja) | 2021-02-22 |
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EP3729901A1 (en) | 2020-10-28 |
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US20200322035A1 (en) | 2020-10-08 |
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