[Bloat] Fwd: Interop runner with satellite links

[Bloat] Fwd: Interop runner with satellite links

[Dave Taht]

of interest to the bufferbloat lost. Nice work sebastian!

---------- Forwarded message ---------
From: Sebastian Endres <basti.endres@fau.de>
Date: Wed, Sep 29, 2021 at 12:58 PM
Subject: Interop runner with satellite links
To: <etosat@ietf.org>, <quic@ietf.org>
Cc: <joerg.deutschmann@fau.de>


Dear all,

for my master's thesis we ran measurements of all publicly available
QUIC implementations over an emulated satellite link. The results are
available online: https://interop.sedrubal.de/

A click on the results also shows time-offset plots, but are not
available for every combination.

In general, the performance of QUIC over high latency (e.g.,
geostationary satellites) is rather poor, especially if there is
packet loss.

Would it make sense to add such tests with challenging link
characteristics to the official QUIC interop runner?

Best regards,

Sebastian




-- 
Fixing Starlink's Latencies: https://www.youtube.com/watch?v=c9gLo6Xrwgw

Dave Täht CEO, TekLibre, LLC

Re: [Bloat] Fwd: Interop runner with satellite links

[Erik Auerswald]

Hi,

On Thu, Sep 30, 2021 at 12:32:01PM -0700, Dave Taht wrote:
> of interest to the bufferbloat lost. Nice work sebastian!
> 
> ---------- Forwarded message ---------
> From: Sebastian Endres <basti.endres@fau.de>
> Date: Wed, Sep 29, 2021 at 12:58 PM
> Subject: Interop runner with satellite links
> [...]
> for my master's thesis we ran measurements of all publicly available
> QUIC implementations over an emulated satellite link. The results are
> available online: https://interop.sedrubal.de/

The web site gives an emulated RTT of 600ms.

When I worked on satellite based IP connectivity for cargo ships ten
years ago, I saw minimum (unloaded) RTTs of about 1.1s (1100ms) for both
LEO (Iridium back then) and GEO based systems.  Thus 600ms RTT seems
quite optimistic to me, at least from the point of view of a user of
satellite systems.

Thanks,
Erik
-- 
It's impossible to learn very much by simply sitting in a lecture,
or even by simply doing problems that are assigned.
                        -- Richard P. Feynman

Re: [Bloat] Fwd: Interop runner with satellite links

[Joerg Deutschmann]

Dear Erik,

we have four different European geostationary satellite providers for 
fixed wireless access, and we usually see RTTs between 600ms and 700ms 
(unloaded, bufferbloat not tested yet), so it seems that the situation 
has improved. Some not in-depth measurements:
https://www.ietf.org/proceedings/104/slides/slides-104-maprg-satellite-internet-performance-measurements-jorg-deutschmann-01.pdf

Best regards,
Joerg