From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:Subject:In-Reply-To:MIME-Version: References:Message-ID:Cc:To:From:Date:Reply-To:Content-ID:Content-Description :Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=WT9e2L138H8+kfgNduQDYDZ+pfMQy6HVFTUf8jX6nrs=; b=NYB7NAdCg7wzQc /5bs6Zr/FCdpDUBiTpO/RnlZR/ejUUW2Dxi93b7NCiUvoxO3VXx89a3yUJynIw7YhlEhLNz+f9qFy G1WGiGjlOQNBSLm/2KH+/lPV3Zqut5/AtookVqXkx4f3lFERLgnfLqMLkAu7F3BiN+Go+Cz8VXZl4 1qOOGqsp6Hj1MSuJMz1XtGm2g2645l4G3HS2I6YOj2kLhW9ETyLhvF2ULpkoNb6YLqOAbONf8t02u Y8UIWG9GZgHSNDL4/iOKwHJ+px1KGfxsQcRCj2frF5I3ITib5ftojeryiu7A/UH+eUARXpBVdbtE3 QDgahhFJeosyHbvO40NA==; Received: from ams.source.kernel.org ([145.40.68.75]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1nonVz-007Gn0-FO for wireless-regdb@lists.infradead.org; Wed, 11 May 2022 14:40:37 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1652280032; bh=wDYEIjYWinYpJIV+w3hmOpIkKvCGB3pRAmibwkS664s=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=u6h5SGH4qblj3ppWgYYOSI1WNAy1LHkhp+KPNQC01zzZPUskrN2zH1r9ll9lQ0aJ6 eCZd3+Tx0zPkYqqMvrB956GsTaLf/OdCd1pZiUdtKWJe/vUqunXJqtz02htxywb8yZ WgPA+K0ADZ31Anng66u5P+gGUmS4NrmKY4zAcvrcEvfyhNdzl7lXCOYV/l3Df5yDq2 6lusI/48hKorKzrome4Hqf/vaHeBgUeTZJCW1Rfd5VYFsYBaplSEZsJR9I+BOTNY6H /wlWh1wvn/AMQHGRHgKCZcywV2YxiegoSnHGQk6XOnQDq+D88e4HuIGT8IWt3+V2tG eiNBiHlg0oZfA== Date: Wed, 11 May 2022 09:40:31 -0500 From: Seth Forshee Message-ID: References: MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: Subject: Re: [wireless-regdb] [PATCH] Regulatory update for 6 GHz operation in United States (US) List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Sender: "wireless-regdb" Errors-To: wireless-regdb-bounces+johannes=sipsolutions.net@lists.infradead.org Content-Transfer-Encoding: 8bit To: Dennis Bland Cc: wireless-regdb@lists.infradead.org List-ID: On Wed, Apr 20, 2022 at 08:56:38PM -0600, Dennis Bland wrote: > With the 6 GHz band (U-NII-5, U-NII-6, U-NII-7, U-NII-8) in USA, the FCC > introduces the concept of a fixed PSD (Power Spectral Density) for all > supported 6 GHz channel widths for LPI (Low Power Indoor) environments. > Wider channel widths have a higher noise floor, therefore specifying a > fixed PSD allows wider channels to operate at a higher EIRP to maintain > the same S/N ratio as smaller channel widths. > > While the 6 GHz specification also allows a "Standard" power mode with > higher EIRP and PSD limits, these devices are also required to employ > AFC (Automatic Frequency Coordination) which normally requires GNSS. > Currently there is no way to specify different EIRP and PSD levels for > APC and non-APC devices. Therefore, only LPI mode is considered here. > > LPI requires non-client (AP) devices to have a maximum PSD of 5 dBm/MHz > and a maximum EIRP of 30 dBm. LPI requires client (STA) devices to have > a maximum PSD of -1 dBm/MHz. The maximum channel width is 320 MHz. > > The following equation is used to calculate the EIRP from the PSD and > channel width: > > EIRP = PSD + 10*log(channel width in MHz) > > Using the maximum PSD values of 5 and -1 for APs and STAs respectively, > the EIRP in dBm for a given channel width can be calculated: > > Channel Width (MHz) AP STA > ------------------------------------------------ > 20 18 12 > 40 21 15 > 80 24 18 > 160 27 21 > 320 31 (max 30) 25 (max 24) > > For channel widths up to 160 MHz, the maximum PSD is the limiting factor. > For the 320 MHz channel width, the maximum EIRP is the limiting factor. > > Unfortunately, because there is currently no mechanism to specify > different power levels for AP and STA modes, and for different channel > widths, the smallest value has to be selected, which is 12 dBm. This > will likely cause connectivity problems with larger channel widths until > these additional parameters can be added. > > 6 GHz operation on oil platforms, vehicles, boats, trains, and drones is > prohibited except on commercial aircraft above 10,000 feet altitude. > An IR (Initiate Radiation) restriction is mentioned in the 6 GHz > specification. > > signed-off-by: Dennis Bland Applied, with the same notes as with the other patch. Thanks! _______________________________________________ wireless-regdb mailing list wireless-regdb@lists.infradead.org http://lists.infradead.org/mailman/listinfo/wireless-regdb