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

[Dave Taht]

very encouraging

---------- Forwarded message ---------
From: Hesham ElBakoury <helbakoury at 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 at 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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Dave Täht CSO, LibreQos
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