[Bloat] FW: [Dewayne-Net] Ajit Pai caves to SpaceX but is still skeptical of Musk's latency claims
David Lang
david at lang.hm
Thu Jun 11 14:56:43 EDT 2020
On Thu, 11 Jun 2020, David P. Reed wrote:
> But I doubt that is where they are going. Instead, I suspect they haven't
> thought about anything other than a packet at a time, with no thought to
> reporting congestion by drops or ECN.
>
> And it's super easy to build up seconds of lag on TCP if you don't signal
> congestion. TCP just keeps opening its window, happy as a clam.
I expect that the bottleneck is going to be in the connection to the Internet.
starlink station to starlink station is one issue
starlink station to Internet is a different issue.
given the download heavy nature of most use, the biggest bottleneck is probably
going to be at their internet connected uplink stations (which I do not expect
to be the consumer stations connected to the internet, but something different)
as for the station to station communications, as I understand it, each satellite
has 4-5 sattelite-satellite connections with one upload/download connection, so
it's going to depend how many satellite hops the packet has to take, but there's
a really good chance that there will be excess bandwidth available in the
sattelite mesh and it will not be the bottleneck.
We will see, but since the answer to satellite-satellite communication being the
bottleneck is to launch more satellites, this boils down to investment vs
service quality. Since they are making a big deal about the latency, I expect
them to work to keep it acceptable.
David Lang
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