From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.lang.hm (unknown [66.167.227.145]) (using TLSv1.2 with cipher ADH-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.bufferbloat.net (Postfix) with ESMTPS id BF3FE3B29E for ; Thu, 23 Feb 2023 19:08:46 -0500 (EST) Received: from dlang-mobile (unknown [10.2.2.69]) by mail.lang.hm (Postfix) with ESMTP id 802DB177117; Thu, 23 Feb 2023 16:08:45 -0800 (PST) Date: Thu, 23 Feb 2023 16:08:45 -0800 (PST) From: David Lang To: Oleg Kutkov cc: starlink@lists.bufferbloat.net In-Reply-To: <5a5453a2-eb91-77ca-1926-38033c3d31a7@olegkutkov.me> Message-ID: References: <5a5453a2-eb91-77ca-1926-38033c3d31a7@olegkutkov.me> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Subject: Re: [Starlink] System and method of providing a medium access control scheduler X-BeenThere: starlink@lists.bufferbloat.net X-Mailman-Version: 2.1.20 Precedence: list List-Id: "Starlink has bufferbloat. Bad." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 24 Feb 2023 00:08:46 -0000 they can only narrow the radio beam so much (probably whatever their cell size is). They can't change the footprint without changing the antenna, so unless they have the beam move around in the cell, the footprint should be slightly larger than the cell size sometimes there is a lot of data going to one station, but sometims it's only going to be a trival amount (think ack packets for a lot of uploads), so they can save airtime by using one timeslot to transmit to many stations at once. David Lang On Fri, 24 Feb 2023, Oleg Kutkov via Starlink wrote: > Date: Fri, 24 Feb 2023 01:47:05 +0200 > From: Oleg Kutkov via Starlink > Reply-To: Oleg Kutkov > To: starlink@lists.bufferbloat.net > Subject: Re: [Starlink] System and method of providing a medium access control > scheduler > > Oh, that's interesting. > > >> the satellite broadcasts the downlink radio frame to all the user > terminals in a group and they each retrieve their respective data from > the downlink radio frame > > I thought the satellite beamformer only sends data frames to the > appropriate UT. It looks like the given satellite covers the whole cell > at one TX channel. > Otherwise, it would be too complex, I guess. > > On 2/23/23 23:53, Dave Taht via Starlink wrote: >> For those of you that don't look at patents, don't look at: >> >> https://patents.justia.com/patent/11540301 >> >> But I would welcome comment from those that do. >> >> H/T virtuallynathan. >> >