Re: [Bloat] Fwd: [CCWG] ETC: An Elastic Transmission Control Using End-to-End Available Bandwidth Perception

[Dave Taht <dave.taht@gmail.com>]

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On Wed, Jul 10, 2024 at 3:11 PM David Collier-Brown via Bloat <
bloat@lists.bufferbloat.net> wrote:

> One of those papers that make you go "why didn't I think of that?"
>
> Of course, it does have to work (;-))
>

No sources, no email addresses, I am tempted to drop in on the conference
to see if any source is available.

There are a lot of ideas in there that I have been advocating a while -
varying the pacing rate (e!) to get an early estimate of congestion - and
quite a few more newer ones that seem excellent, like just treating the
leading edge of an ack as part of the estimator.  Love how well it competes
with itself!

It's just a paper... no sources... agggh....

> --dave
> On 2024-07-10 16:40, Dave Taht via Bloat wrote:
>
> very encouraging
>
> ---------- Forwarded message ---------
> From: Hesham ElBakoury <helbakoury@gmail.com>
> Date: Wed, Jul 10, 2024 at 1:34 PM
> Subject: [CCWG] ETC: An Elastic Transmission Control Using End-to-End
> Available Bandwidth Perception
> To: <ccwg@ietf.org>
>
>
> This paper [1] is published in this week USENIX ATC 2024. It is an
> interesting paper with surprising results.
>
> *Paper Abstract*
> "Researchers and practitioners have proposed various transport protocols
> to keep up with advances in networks and the applications that use them.
> Current Wide Area Network protocols strive to identify a congestion signal
> to make distributed but fair judgments. However, existing congestion
> signals such as RTT and packet loss can only be observed after congestion
> occurs. We therefore propose Elastic Transmission Control (ETC). ETC
> exploits the instantaneous receipt rate of N consecutive packets as the
> congestion signal. We refer to this as the pulling rate, as we posit that
> the receipt rate can be used to “pull” the sending rate towards a fair
> share of the capacity. Naturally, this signal can be measured prior to
> congestion, as senders can access it immediately after the acknowledgment
> of the first N packets. Exploiting the pulling rate measurements, ETC
> calculates the optimal rate update steps following a simple elastic
> principle: the further away from the pulling rate, the faster the sending
> rate increases. We conduct extensive experiments using both simulated and
> real networks. Our results show that ETC outperforms the state-of-the-art
> protocols in terms of both throughput (15% higher than Copa) and latency
> (20% lower than BBR). Besides, ETC shows superiority in convergence speed
> and fairness, with a 10× im-provement in convergence time even compared to
> the protocol with the best convergence performance."
>
> Hesham
> [1] https://www.usenix.org/conference/atc24/presentation/han
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> David Collier-Brown,         | Always do right. This will gratify
> System Programmer and Author | some people and astonish the restdavecb@spamcop.net           |              -- Mark Twain
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