JP2019220999A - Wlanにおけるbssカラー強化型送信(bss−cet) - Google Patents
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Abstract
Description
本出願は、参照によりその内容が本明細書に組み込まれている、2015年1月9日に出願した米国特許仮出願第62/101,645号明細書の利益を主張するものである。
CCA=−inf(例えばまたは許容範囲の最小値)
CCA(dBm)=CCA_nominal(dBm)+Margin(dB)
Margin=f(AP_STA1,STA2_STA1)
マージンがそれを用いて決定される関数は、STAからの、それらの受信器感度、送信電力レベル、送信ヘッドルーム、または能力その他の、1または複数などの情報を含むことができる。CCA_nominal、マージン、AP_STA1、またはSTA2_STA1の1または複数が、想定されることができる。CCA_nominalは、ネットワークに対するベースラインCCA、および/またはネットワークにおいて用いられるBSS固有のCCAを指すことができる。マージンは、公称CCAのSTA固有の変更を指すことができる。マージンは、それ自体のBSS内のSTA例えばSTA1と、STA自体のBSS内のAP例えばAP1との間の、STA自体のBSS例えばBSS1における送信、および/またはSTA1の観点からのOBSS例えばBSS2内の、それのAPからのパケットを受信する(例えば現在受信している)OBSS STA例えばSTA2の受信器要件の、関数とすることができる。いくつかまたはすべてのSTAに対するマージンがゼロである場合、CCA調整はBSS全体にわたるものとなり得る。Marginの計算に用いられるAP_STA1は、例えばBSS1内のSTA1からAP1への送信に基づく、APの受信器要件を指すことができる。例えばこれは、APにおける送信のSINR、またはSTA1による送信によりAPにおいて受信される電力(例えばまたはその逆)によって推定される、AP1とSTA1との間のチャネル利得の関数とすることができる。より高いチャネル利得またはより高いSINR/受信電力を有するSTAは、より高速に、および/またはBSS外送信への干渉が少ない状態で送信することができ、より高いCCAを有することができ、および/または逆も同様である。
CCA(dBm)=CCA_nominal(dBm)−Margin(dB)
Tx_power=nominal_Tx_power−(Rx_power_AP1−Rx_power_desired_AP1)
送信がOBSS内のノードからである場合、CCA閾値基準および送信電力は以下として推定されることができる。
CCA=CCA_nominal+Margin
Tx_power=Tx_power_nominal−Margin
Margin=f(AP_STA1,STA2_STA1)
この場合、STA送信電力は、それの受信側と、OBSS送信の受信側との関数とすることができる。AP_STA1は、例えばSTA1からAP1への送信に基づく、APの受信器要件を指すことができる。例えばこれは、AP1における送信の信号対干渉および雑音比によって推定されるAP1とSTA1との間のチャネル利得、またはSTA1による送信によるAP1において受信される電力(例えばまたはその逆)の関数とすることができる。より高いチャネル利得またはより高いSINR/受信電力を有するSTAは、より高速に、およびBSS外送信への干渉が少ない状態で送信することができ、より高いCCAを有することができ、および/または逆も同様である。STA2_STA1は、例えばSTA1からAP1への送信に基づく、STA2の受信器要件を指すことができる。例えばこれは、STA1による送信によってSTA2において受信される電力により推定される、STA2とSTA1との間のチャネル利得の関数とすることができる(例えばまたはその逆)。より高いチャネル利得またはより高いSINR/受信電力を有するSTAは、より高速に、およびBSS外送信への干渉が少ない状態で送信することができ、より高いCCAを有することができ、および/または逆も同様である。例えば、
Yk=H1,kX1,k+H2,kX2,k+Nk
によって表されることができ、ただしH1,kはSTAと関連付けられたAPとの間の所望のチャネル応答とすることができ、X1,kはk番目のサブキャリア上の意図されたシンボルとすることができ、H2,kは干渉チャネル応答とすることができ、X2,kはk番目のサブキャリア上の干渉シンボルとすることができる。
HI=UΣV=[U1U2]ΣV
ただし、UはN×Nユニタリ行列とすることができ、VはM×Mユニタリ行列とすることができ、Σはそれの最上主対角線上に特異値を有するN×M行列とすることができる。U1はHIの範囲空間に及ぶことができる固有ベクトルを保持するUのN×M部分行列とすることができる。U2は、その列ベクトルがHIのヌル空間内に位置することができるN×(N−M)部分行列とすることができる。
y=HDPDxD+HIxI+n
=UDxD+HIxI+n
Claims (1)
- アクセスポイント(AP)によって実施される方法であって、
ステーション(STA)から、隣接BSSに関連付けられた重複基本サービスセット(OBSS)、および前記隣接BSSが前記APのBSSと同じBSSカラーを使用していることの表示を含むイベント報告を受信するステップと、
前記APによって、前記イベント報告に基づく前記APのための他のBSSカラー、および前記APが前記他のBSSカラーに切り替わるまでのカラー切り替え時間を表示しているBSSカラー変更アナウンスメントメッセージを前記STAに送信するステップと、
を備える方法。
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JP2021106478A JP7129522B2 (ja) | 2015-01-09 | 2021-06-28 | Wlanにおけるbssカラー強化型送信(bss-cet) |
JP2022131725A JP7411744B2 (ja) | 2015-01-09 | 2022-08-22 | Wlanにおけるbssカラー強化型送信(bss-cet) |
JP2023218371A JP2024019695A (ja) | 2015-01-09 | 2023-12-25 | Wlanにおけるbssカラー強化型送信(bss-cet) |
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