JP7239570B2 - 無線標準クライアントデバイスからのビームフォーミング動的情報に基づく動き検出 - Google Patents
無線標準クライアントデバイスからのビームフォーミング動的情報に基づく動き検出 Download PDFInfo
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Description
本出願は、「無線標準クライアントデバイスからのビームフォーミング動的情報に基づく動き検出」という名称の、2018年11月8日に出願された米国特許出願第16/184,729号、「ビームフォーミング動的情報に基づく動き検出」という名称の、2017年11月15日に出願された米国特許仮出願第62/586,824号、「中央コンピューティングノードを用いた動き検出」という名称の、2018年2月22日に出願された米国特許仮出願第62/633,789号明細書、及び「ビームフォーミング動的情報に基づく動き検出」という名称の、2018年3月26日に出願された米国特許仮出願第62/648,110号に対する優先権を主張するものであり、これらの全ては、引用により本明細書に組み込まれる。
によってモデル化することができ、式中、
は、送信機212によってサブキャリア周波数kで送信されたベクトル
を表し、
は、受信機222によって受信されたベクトル
を表し、
は、寸法NRX×NTxのチャネル応答行列を表し(式中、NRXは、受信機でのアンテナの数であり、NRXは、送信機でのアンテナの数である)、
は、白色(空間的及び時間的に)のガウス雑音を表す。ビームフォーミングプロセスが使用される場合、ビームフォーマ210は、ステアリング行列
を送信信号に適用する。従って、システム200は、式(2)
は、寸法NTx×NSTSの行列である(式中NSTSは、
の要素数である)。
を演算する。その後、チャネル行列は、行列
に符号化することができる。例示的な符号化プロセスは、IEEE802.11規格のセクション20.3.12.5(非圧縮)及び20.3.12.6(圧縮)において概説されている。一部の例において、行列
は、動作番号Ack管理フレーム(IEEE802.11ac-2013規格のセクション8.3.3.14で論じられているような)を使用して、ビームフォーミングレポートフィールド(IEEE802.11ac-2013規格のセクション8.4.1.28及びセクション8.4.1.29で論じられているような)で送られる。ビームフォーミ220はまた、同様のビームフォーミングプロセスを実施して、ビームフォーミングされた信号をビームフォーマ210に送るステアリング行列を決定することができる。他の実施構成において、暗示的ビームフォーミングを使用することができる。例えば、暗示的ビームフォーミングでは、ビームフォーマ210は、現在のチャネル状態に関するフィードバックがビームフォーミ220によって提供されないので、ビームフォーミング情報を演算することが必要とされる。このような実施構成において、ビームフォーマ210は、ビームフォーミ220にサウンディングフレームを送るように要求する。ビームフォーミ220は、要求に応答して、サウンディングフレーム(例えば、ヌルデータパケット)をビームフォーマ220に送る。ビームフォーマ210は、サウンディングフレームを受信し、現在のチャネル状態を決定し、例えば、ビームフォーミ220とのチャネルの相互関係に基づいて行列Hkを演算する。
又は具体的には、図示の実施例において、式(4)
は、アンテナ404-1によって受信された信号を表し、
は、アンテナ404-2によって受信された信号を表し、
は、送信機402の第1のアンテナによって送信された信号を表し、
は、送信機402の第1のアンテナによって送信された信号を表す。上記のことから、2つの送信機アンテナ及び2つの受信機アンテナを有するこの実施例において、H-行列は次式のように記述することができることがわかる。
で表すことができる。
Claims (29)
- 動き検出方法であって、
無線通信デバイスによって、空間を介して1又は2以上の近隣デバイスに無線標準プロトコルメッセージを送信するステップと、
前記1又は2以上の近隣デバイスの各々から前記無線標準プロトコルメッセージに応答したビームフォーミング情報フィードバックを含む対応する無線標準プロトコル応答を受信するステップと、
前記近隣デバイスの各々からの前記ビームフォーミング情報フィードバックに基づいて前記空間内の物体の動きを検出するステップと、
を含み、
前記物体の動きを検出するステップが、
ビームフォーミング動的情報に基づいて、前記近隣デバイスで受信された無線信号の相対強度を前記近隣デバイスに対する方向の関数として表す空間マップを生成するステップと、
経時的な前記空間マップの変化を分析するステップと、
を含む、動き検出方法。 - 前記無線標準プロトコルメッセージは、無線通信規格に従って前記無線通信デバイスによって生成され、前記無線標準プロトコル応答は、前記無線通信規格に従って生成される、請求項1に記載の方法。
- 前記無線通信規格は、IEEE802.11規格を含む、請求項2に記載の方法。
- 前記無線通信規格は、メッシュネットワーク規格を含む、請求項2に記載の方法。
- 前記無線標準プロトコルメッセージは、特定の近隣デバイスにアドレス指定されたpingを含む、請求項1に記載の方法。
- 前記無線標準プロトコルメッセージは、複数の近隣デバイスにブロードキャストされたpingを含む、請求項1に記載の方法。
- 前記無線標準プロトコルメッセージは、データトラフィックを含む、請求項1に記載の方法。
- 前記ビームフォーミング情報フィードバックは、
H-行列、
V-行列、又は
圧縮V-行列
のうちの少なくとも1つを含む、請求項1から7の何れかに記載の方法。 - 前記無線通信デバイス及び前記1又は2以上の近隣デバイスは、アドホック動き感知ネットワークを形成する、請求項1に記載の方法。
- 前記ビームフォーミング情報フィードバックを使用して前記空間内の前記物体の場所を検出するステップを含む、請求項1から7の何れかに記載の方法。
- 無線通信デバイスであって、
プロセッサと、
前記プロセッサによって実行されたときに、前記無線通信デバイスに以下の動作を実行させる命令を含むメモリと、
を備え、
前記動作が、
空間を介して1又は2以上の近隣デバイスに無線標準プロトコルメッセージを送信するステップと、
前記1又は2以上の近隣デバイスの各々から前記無線標準プロトコルメッセージに応答したビームフォーミング情報フィードバックを含む対応する無線標準プロトコル応答を受信するステップと、
前記近隣デバイスの各々からの前記ビームフォーミング情報フィードバックに基づいて前記空間内の物体の動きを検出するステップと、
を含み、
前記物体の動きを検出するステップが、
ビームフォーミング動的情報に基づいて、前記近隣デバイスで受信された無線信号の相対強度を前記近隣デバイスに対する方向の関数として表す空間マップを生成するステップと、
経時的な前記空間マップの変化を分析するステップと、
を含む、無線通信デバイス。 - 前記無線標準プロトコルメッセージは、無線通信規格に従って前記無線通信デバイスによって生成され、前記無線標準プロトコル応答は、前記無線通信規格に従って生成される、請求項11に記載のデバイス。
- 前記無線通信規格は、IEEE802.11規格を含む、請求項12に記載のデバイス。
- 前記無線通信規格は、メッシュネットワーク規格を含む、請求項12に記載のデバイス。
- 前記無線標準プロトコルメッセージは、特定の近隣デバイスにアドレス指定されたpingを含む、請求項11に記載のデバイス。
- 前記無線標準プロトコルメッセージは、複数の近隣デバイスにブロードキャストされたpingを含む、請求項11に記載のデバイス。
- 前記無線標準プロトコルメッセージは、データトラフィックを含む、請求項11に記載のデバイス。
- 前記ビームフォーミング情報フィードバックは、
H-行列、
V-行列、又は
圧縮V-行列
のうちの少なくとも1つを含む、請求項11から17の何れかに記載のデバイス。 - 前記無線通信デバイス及び1又は2以上の近隣デバイスは、アドホック動き感知ネットワークを形成する、請求項11に記載のデバイス。
- 前記動作は、前記ビームフォーミング情報フィードバックを使用して前記空間内の前記物体の場所を検出するステップを含む、請求項11から17の何れかに記載のデバイス。
- データ処理装置によって実行されたときに、以下の動作を実行する命令を含む非一時的コンピュータ可読記憶媒体であって、
前記動作が、
無線通信デバイスによって、空間を介して1又は2以上の近隣デバイスに無線標準プロトコルメッセージを送信するステップと、
前記1又は2以上の近隣デバイスの各々から前記無線標準プロトコルメッセージに応答したビームフォーミング情報フィードバックを含む対応する無線標準プロトコル応答を受信するステップと、
前記近隣デバイスの各々からの前記ビームフォーミング情報フィードバックに基づいて前記空間内の物体の動きを検出するステップと、
を含み、
前記物体の動きを検出するステップが、
ビームフォーミング動的情報に基づいて、前記近隣デバイスで受信された無線信号の相対強度を前記近隣デバイスに対する方向の関数として表す空間マップを生成するステップと、
経時的な前記空間マップの変化を分析するステップと、
を含む、非一時的コンピュータ可読媒体。 - 前記無線標準プロトコルメッセージは、無線通信規格に従って前記無線通信デバイスによって生成され、前記無線標準プロトコル応答は、前記無線通信規格に従って生成される、請求項21に記載の非一時的コンピュータ可読媒体。
- 前記無線通信規格は、IEEE802.11規格を含む、請求項22に記載の非一時的コンピュータ可読媒体。
- 前記無線標準プロトコルメッセージは、特定の近隣デバイスにアドレス指定されたpingを含む、請求項21に記載の非一時的コンピュータ可読媒体。
- 前記無線標準プロトコルメッセージは、複数の近隣デバイスにブロードキャストされたpingを含む、請求項21に記載の非一時的コンピュータ可読媒体。
- 前記無線標準プロトコルメッセージは、データトラフィックを含む、請求項21に記載の非一時的コンピュータ可読媒体。
- 前記ビームフォーミング情報フィードバックは、
H-行列、
V-行列、又は
圧縮V-行列
のうちの少なくとも1つを含む、請求項21から26の何れかに記載の非一時的コンピュータ可読媒体。 - 前記無線通信デバイス及び1又は2以上の近隣デバイスは、アドホック動き感知ネットワークを形成する、請求項21に記載の非一時的コンピュータ可読媒体。
- 前記動作は、前記ビームフォーミング情報フィードバックを使用して前記空間内の前記物体の場所を検出するステップを含む、請求項21から26の何れかに記載の非一時的コンピュータ可読媒体。
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