From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from sainfoin-smtp-out.extra.cea.fr (sainfoin-smtp-out.extra.cea.fr [132.167.192.228]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.bufferbloat.net (Postfix) with ESMTPS id 0F1E73B29D for ; Tue, 4 Jun 2024 07:43:31 -0400 (EDT) Received: from e-emp-b0.extra.cea.fr (e-emp-b0.extra.cea.fr [132.167.198.36]) by sainfoin-sys.extra.cea.fr (8.14.7/8.14.7/CEAnet-Internet-out-4.0) with ESMTP id 454BhUmY021741 for ; Tue, 4 Jun 2024 13:43:30 +0200 Received: from pps.filterd (e-emp-b0.extra.cea.fr [127.0.0.1]) by e-emp-b0.extra.cea.fr (8.18.1.2/8.18.1.2) with ESMTP id 4549w4mg010362 for ; Tue, 4 Jun 2024 13:43:30 +0200 Received: from muguet2-smtp-out.intra.cea.fr (muguet2-smtp-out.intra.cea.fr [132.166.192.13]) by e-emp-b0.extra.cea.fr (PPS) with ESMTP id 3yggacae9f-1 for ; Tue, 04 Jun 2024 13:43:30 +0200 (MEST) Received: from [10.8.32.70] (is156570.intra.cea.fr [10.8.32.70]) by muguet2-sys.intra.cea.fr (8.14.7/8.14.7/CEAnet-Internet-out-4.0) with ESMTP id 454BhUWB026633 for ; Tue, 4 Jun 2024 13:43:30 +0200 Content-Type: multipart/alternative; boundary="------------aJlXOybVXaYJx65xQe0KGpkp" Message-ID: Date: Tue, 4 Jun 2024 13:43:30 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird To: starlink@lists.bufferbloat.net References: <32AD770E-336E-4CF4-8B1B-8AE7353981CC@ieee.org> <030p06nr-4169-9341-nn73-4n06nprp9863@ynat.uz> <3F548B50-D476-4E54-B18E-3418978105CE@ieee.org> Content-Language: fr From: Alexandre Petrescu In-Reply-To: X-Proofpoint-ORIG-GUID: VpIca8BuWoRJB5hjUsvaDl9CEzb-zfdf X-Proofpoint-GUID: VpIca8BuWoRJB5hjUsvaDl9CEzb-zfdf Subject: Re: [Starlink] SpaceX/Starlink says it's ready for a fall satellite-to-cell service with T-Mobile 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: Tue, 04 Jun 2024 11:43:32 -0000 This is a multi-part message in MIME format. --------------aJlXOybVXaYJx65xQe0KGpkp Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit does it say whether it is text only, data only, or everything including voice? Le 04/06/2024 à 13:20, Frantisek Borsik via Starlink a écrit : > Some additional reading from William Webb: > > https://www.linkedin.com/pulse/satellite-direct-device-workable-william-webb-sonke/?trackingId=Sjha4DY8SqONFA9g%2Bb5b%2Bw%3D%3D > > All the best, > > Frank > > Frantisek (Frank) Borsik > > https://www.linkedin.com/in/frantisekborsik > > Signal, Telegram, WhatsApp: +421919416714 > > iMessage, mobile: +420775230885 > > Skype: casioa5302ca > > frantisek.borsik@gmail.com > > > > On Tue, Jun 4, 2024 at 2:54 AM David Lang wrote: > > Eugene Y Chang wrote: > > >> On Jun 3, 2024, at 12:41 PM, David Lang wrote: > >> > >> Eugene Y Chang wrote: > >> > >>> I expect low data rate because the distance will fall back to > a lower coding rate. > >> > >> I think it's going to be more a matter of very large cells, so > many people sharing the available bandwidth > >> > >>> I observe a difference in my phone’s batter life between urban > and rural usage. I expect the battery life to be significantly > reduced with Starlink. > >>> And yes… if the phone isn’t communicating then the battery > life isn’t drawn down much… > >> > >> In my experience, a phone that's trying to find a tower uses > more power than one that has a tower, but is otherwise idle > > > > When the phone is searching for a tower, it is transmitting at > maximum power. > > Then, the phone adjusts the transmit power according to the > distance to the tower, > > In an urban environment, the distance to the tower is usually > less (i.e. smaller cells due to subscriber density). > > In a rural environment, there is more distance to the tower, and > the phone is transmitting at higher power (i.e., towers are > farther apart for larger cells due to fewer subscribers per tower, > up to the max tower separation.) > > When you are mobile, the power is proportionate to the mean > distance to the tower during your operations. > > and for direct-to-satellite, it's going to be a max power > situation, similar to > rural. > > But when a phone is not connected, how frequent are it's searches > for towers > (especially if it has multiple bands to check) compared to the > 'keepalive' pings > when it is connected? if it's doing more transmissions for it's > search and > attempts to connect than it does while connected and just > confirming the > connection, that could eat more power. > > David Lang > > > _______________________________________________ > Starlink mailing list > Starlink@lists.bufferbloat.net > https://lists.bufferbloat.net/listinfo/starlink --------------aJlXOybVXaYJx65xQe0KGpkp Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: 8bit

does it say whether it is text only, data only, or everything including voice?

Le 04/06/2024 à 13:20, Frantisek Borsik via Starlink a écrit :
Some additional reading from William Webb:


All the best,

Frank

Frantisek (Frank) Borsik

 

https://www.linkedin.com/in/frantisekborsik

Signal, Telegram, WhatsApp: +421919416714 

iMessage, mobile: +420775230885

Skype: casioa5302ca

frantisek.borsik@gmail.com



On Tue, Jun 4, 2024 at 2:54 AM David Lang <david@lang.hm> wrote:
Eugene Y Chang wrote:

>> On Jun 3, 2024, at 12:41 PM, David Lang <david@lang.hm> wrote:
>>
>> Eugene Y Chang wrote:
>>
>>> I expect low data rate because the distance will fall back to a lower coding rate.
>>
>> I think it's going to be more a matter of very large cells, so many people sharing the available bandwidth
>>
>>> I observe a difference in my phone’s batter life between urban and rural usage. I expect the battery life to be significantly reduced with Starlink.
>>> And yes… if the phone isn’t communicating then the battery life isn’t drawn down much…
>>
>> In my experience, a phone that's trying to find a tower uses more power than one that has a tower, but is otherwise idle
>
> When the phone is searching for a tower, it is transmitting at maximum power.
> Then, the phone adjusts the transmit power according to the distance to the tower,
> In an urban environment, the distance to the tower is usually less (i.e. smaller cells due to subscriber density).
> In a rural environment, there is more distance to the tower, and the phone is transmitting at higher power (i.e., towers are farther apart for larger cells due to fewer subscribers per tower, up to the max tower separation.)
> When you are mobile, the power is proportionate to the mean distance to the tower during your operations.

and for direct-to-satellite, it's going to be a max power situation, similar to
rural.

But when a phone is not connected, how frequent are it's searches for towers
(especially if it has multiple bands to check) compared to the 'keepalive' pings
when it is connected? if it's doing more transmissions for it's search and
attempts to connect than it does while connected and just confirming the
connection, that could eat more power.

David Lang

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