mpetach at netflight.com
Sun Jan 22 23:05:29 UTC 2023
On Sun, Jan 22, 2023 at 2:45 PM Michael Thomas <mike at mtcc.com> wrote:
> I read in the Economist that the gen of starlink satellites will have
> the ability to route messages between each satellite. Would conventional
> routing protocols be up to such a challenge? Or would it have to be
> custom made for that problem? And since a lot of companies and countries
> are getting on that action, it seems like fertile ground for (bad) wheel
Unlike most terrestrial links, the distances between satellites are not
and thus the latency between nodes is variable, making the concept of
"Shortest Path First" calculation a much more dynamic and challenging
one to keep current, as the latency along a path may be constantly changing
as the satellite nodes move relative to each other, without any link state
changing to trigger a new SPF calculation.
I suspect a form of OLSR might be more advantageous in a dynamic partial
mesh between satellites, but I haven't given it as much deep thought as
be necessary to form an informed opinion.
So, yes--it's likely the routing protocol used will not be entirely
but will instead incorporate continuous latency information in the LSDB,
and path selection will be time-bound based on the rate of increase in
along currently-selected edges in the graph.
An interesting problem to dive into, certainly. :)
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