JP7186394B2 - 通信装置及び方法 - Google Patents
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Description
図1は、例示WLAN(無線ローカルエリアネットワーク)100の図である。WLAN100は、AP(アクセスポイント)102と、AP102に関連する複数のSTA(ステーション)104とを含む。WLAN100のダウンリンク(DL)において、AP102は、DL MU通信(すなわち、DL MU-MIMOまたはDL OFDMA通信)を介してそれぞれのデータストリームを複数のSTA104に同時に送信するように構成することができる。同様に、WLAN100のアップリンク(UL)において、複数のSTA104は、UL MU通信(すなわち、UL MU-MIMOまたはUL OFDMA通信)を介してそれぞれのデータストリームをAP102に同時に送信することができる。
図4は、本開示の実施例1による、例示サウンディング手順400およびサウンディング手順400に基づいた例示UL MU送信を示す概略タイミング図である。サウンディング手順400は、AP102が、STAからAP102への通信チャネルに対応するチャネル状態情報および/または品質インジケータを、STAによってAP102に送信されるサウンディングフレームから直接引き出す、明示的なサウンディング手順である。
図6は、本開示の実施例2による、サウンディング手順600に基づいた例示サウンディング手順600および例示UL MU送信を示す概略タイミング図である。図4のサウンディング手順400と同様に、サウンディング手順600もまた明示的なサウンディング手順である。
図7は、本開示の実施例3による、例示サウンディング手順700およびサウンディング手順700に基づいた例示UL MU送信を示す概略タイミング図である。図4のサウンディング手順400と同様に、サウンディング手順700も、明示的なサウンディング手順である。
図8は、本開示の実施例4による、例示サウンディング手順800およびサウンディング手順800に基づいた例示UL MU送信を示す概略タイミング図である。図4のサウンディング手順400と同様に、サウンディング手順800はまた、明示的なサウンディング手順である。
図9は、本開示の実施例5による、サウンディング手順900に基づいた例示サウンディング手順900および例示UL MU送信を示す概略タイミング図である。図9のサウンディング手順400と同様に、サウンディング手順900はまた、明示的なサウンディング手順である。
図10は、本開示の実施例6による、例示サウンディング手順1000およびサウンディング手順1000に基づいた例示のカスケードされたDLおよびUL MU送信を示す概略タイミング図である。明示的なULサウンディングだけに対処する最初の5つの実施例とは異なり、サウンディング手順1000は、明示的なDLサウンディングおよび明示的なULサウンディングが効率的な方法で共同して実行される、明示的な双方向性サウンディング手順である。
図11は、本開示による、UL MU送信のために複数の第2の通信装置とサウンディングを実行するための、第1の通信装置によって行う第1の例示方法1100を示すフローチャートである。単に説明的な目的だけのために、方法1100は、図4、図6、図7、図8および図9に関して述べられて、APとしての第1の通信装置およびSTAとしての第2の通信装置の関連で記載されている。しかしながら、第1の通信装置は、AP以外の、ピアツーピアネットワークのノードなどの適切な通信装置でもよく、一方で第2の通信装置は、STA以外の、ピアツーピアネットワークのノードなどの適切な通信装置でもよい。
図15は、本開示によるAP102の例示構成を示すブロック図である。AP102は、ネットワークインタフェース1504に連結するホストプロセッサ1502を含む。ネットワークインタフェース1504は、MAC(メディアアクセス制御)プロセッサ1506およびPHYプロセッサ1508を含む。PHYプロセッサ1508は、複数のアンテナ1510に連結する。ネットワークインタフェース1504(例えば、MACプロセッサ1506および/またはPHYプロセッサ1508)は、STA104とのサウンディング手順を実行して、上述した実施例に従ってデータをSTA104に通信するように、構成される。
図16は、本開示によるSTA104の例示構成を示すブロック図である。STA104は、ネットワークインタフェース1604に連結するホストプロセッサ1602を含む。ネットワークインタフェース1604は、MACプロセッサ1606およびPHYプロセッサ1608を含む。PHYプロセッサ1608は、1つまたは複数のアンテナ1610に連結する。ネットワークインタフェース1604(例えば、MACプロセッサ1606および/またはPHYプロセッサ1608)は、AP102とのサウンディング手順を実行して、上述した実施例に従ってデータをAP102に通信するように、構成される。
1504 ネットワークインタフェース
1506 MACプロセッサ
1508 PHYプロセッサ
1510 アンテナ
1602 ホストプロセッサ
1604 ネットワークインタフェース
1606 MACプロセッサ
1608 PHYプロセッサ
1610 アンテナ
Claims (6)
- 回路と送信部を含む、第1の通信装置であり、
前記回路は、
複数の第2の通信装置のそれぞれについて前記第2の通信装置と関連したOFDM通信チャネルの、バンド幅全体および/または1つまたは複数のサブバンドに対応する、チャネル状態情報を取得し、
前記第2の通信装置のそれぞれについて取得される前記チャネル状態情報に基づいて、前記第2の通信装置のそれぞれに対するバンド幅全体および/または1つまたは複数の候補サブバンドのそれぞれについて、送信ビームフォーミングマトリクスを展開し、
前記送信部は、
前記送信ビームフォーミングマトリクスに基づくそれぞれのフィードバック情報を前記複数の第2の通信装置にマルチユーザ送信で多重し同時に送信する、
第1の通信装置。 - 前記第1の通信装置はアクセスポイントであり、前記複数の第2の通信装置は、前記アクセスポイントと関連したステーションである、
請求項1に記載の第1の通信装置。 - 候補サブバンドまたは前記バンド幅全体がUL SU-MIMO送信のためだけに使われる予定である場合、SU-MIMO送信に特有の前記送信ビームフォーミングマトリクスが前記候補サブバンドまたは前記バンド幅全体に対して展開される、
請求項1に記載の第1の通信装置。 - 候補サブバンドまたは前記バンド幅全体がUL MU-MIMO送信のためだけに使われる予定である場合、MU-MIMO送信に特有の前記送信ビームフォーミングマトリクスが前記候補サブバンドまたは前記バンド幅全体に対して展開される、
請求項1に記載の第1の通信装置。 - 候補サブバンドまたは前記バンド幅全体がUL SU-MIMOまたはMU-MIMO送信のために使われる予定である場合、SU-MIMO送信に特有の前記送信ビームフォーミングマトリクスおよびMU-MIMO送信に特有の前記送信ビームフォーミングマトリクスの両方が前記候補サブバンドまたは前記バンド幅全体に対して展開される、
請求項1に記載の第1の通信装置。 - 第1の通信装置において、複数の第2の通信装置のそれぞれについて前記第2の通信装置と関連したOFDM通信チャネルの、バンド幅全体および/または1つまたは複数のサブバンドに対応する、チャネル状態情報を取得し、
第1の通信装置において、前記第2の通信装置のそれぞれについて取得される前記チャネル状態情報に基づいて、前記第2の通信装置のそれぞれに対するバンド幅全体および/または1つまたは複数の候補サブバンドのそれぞれについて、送信ビームフォーミングマトリクスを展開し、
第1の通信装置において、前記送信ビームフォーミングマトリクスに基づくそれぞれのフィードバック情報を前記複数の第2の通信装置にマルチユーザ送信で多重し同時に送信する、
ことを含む方法。
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