Conference paper
Alternative Backoff: Achieving low latency andhigh throughput with ECN and AQM
IFIP Networking Conference (IFIP Networking) AND WORKSHOPS
IFIP Network Conference (IFIP Networking) and Workshops (Toulouse, Framce, 20/05/2015–22/05/2015)
2015
Abstract
CoDel and PIE are recently proposed Active Queue Management (AQM) mechanisms that minimize the time packets spend enqueued at a bottleneck, instantiating shallow, 5 ms to 20 ms buffers with short-term packet burst tolerance. However, shallow buffering causes noticeable TCP performance degradation when a path’s underlying round trip time (RTT) heads above 60 ms to 80 ms (not uncommon with cross-continental and inter-continental traffic). Using less-aggressive multiplicative backoffs is known to compensate for shallow bottleneck buffering. We propose ABE: “Alternative Backoff with ECN”, which consists of enabling Explicit Congestion Notification (ECN) and letting individual TCP senders use a larger multiplicative decrease factor in reaction to ECN-marks from AQMenabled bottlenecks. Using a mix of experiments, theory and simulations with standard NewReno and CUBIC flows, we show significant performance gains in lightlymultiplexed scenarios, without losing the delay-reduction benefits of deploying CoDel or PIE. ABE is a senderside- only modification that can be deployed incrementally (requiring no flag-day) and offers a compelling reason to deploy and enable ECN across the Internet.
Details
- Title
- Alternative Backoff: Achieving low latency andhigh throughput with ECN and AQM
- Authors/Creators
- N. Khademi (Author/Creator)M. Welzl (Author/Creator)G. Armitage (Author/Creator)C. Kulatunga (Author/Creator)D. Ros (Author/Creator)G. Fairhurst (Author/Creator)S. Gjessing (Author/Creator)S. Zander (Author/Creator)
- Publication Details
- IFIP Networking Conference (IFIP Networking) AND WORKSHOPS
- Conference
- IFIP Network Conference (IFIP Networking) and Workshops (Toulouse, Framce, 20/05/2015–22/05/2015)
- Identifiers
- 991005541154507891
- Murdoch Affiliation
- School of Engineering and Information Technology
- Language
- English
- Resource Type
- Conference paper
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