I am a networking researcher at
Microsoft Research (Redmond) and the
Office of the CTO, Azure for Operators.
I am the creator of
Puffer, a video streaming site
with 200,000+ users and an open research platform widely
used in academia.
My current research interests span:
- ML/RL for networking
- video conferencing/streaming systems
- transport and applications
I completed my Ph.D. in computer science at Stanford
University, advised by Keith Winstein
and Philip Levis.
My dissertation was
on the development of platforms and algorithms to achieve
practical reinforcement learning on the
internet, in the context of video streaming and congestion control.
Before that, I graduated from Tsinghua University, where I received
a B.S. in computer science from the
Yao Class
and a B.A. in economics. I also studied at MIT during my undergraduate years.
My work has received the
IRTF Applied Networking Research Prize (ANRP),
USENIX NSDI Community Award,
USENIX ATC Best Paper Award, and
APNet Best Paper Award.
I am serving on the program committees
of USENIX NSDI and ACM CoNEXT, the award committee of
ANRP, and co-chairing the networking area of the
Journal of Systems Research.
Michael Rudow, Francis Y. Yan, Abhishek Kumar, Ganesh Ananthanarayanan,
Martin Ellis, K.V. Rashmi
To appear at USENIX NSDI 2023
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Tambur is a new approach to forward error correction (FEC) for
videoconferencing built upon streaming codes and machine learning.
Tambur reduced decoding failures while consuming less bandwidth for redundancy.
Zhengxu Xia*, Yajie Zhou*, Francis Y. Yan, Junchen Jiang (*equal contribution)
Proceedings of the ACM Special Interest Group on Data Communication (SIGCOMM), August 2022
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Genet is a novel training framework that enhances the performance and
generalization of reinforcement learning (RL) algorithms in networking.
Genet builds on curriculum learning with judicious use of rule-based baselines.
It substantially improves the performance and generalization of simulation-trained
RL algorithms under unseen workloads and in real environments.
Jeongyoon Eo, Zhixiong Niu, Wenxue Cheng, Francis Y. Yan,
Rui Gao, Jorina Kardhashi, Scott Inglis, Michael Revow, Byung-Gon Chun,
Peng Cheng, Yongqiang Xiong
Asia-Pacific Workshop on Networking (APNet), July 2022
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OpenNetLab is an open platform for
training, validating, and evaluating RL-based congestion-control
(bandwidth estimation) algorithms for real-time communications (RTC) such as
videoconferencing. It has successfully aided the development of novel RL-based
congestion-control algorithms for RTC during our
Grand Challenge
hosted at ACM MMSys '21.
Zibo Wang, Pinghe Li, Chieh-Jan Mike Liang, Feng Wu, Francis Y. Yan
arXiv:2212.12180 (preprint), December 2022
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Autothrust is a learning-assisted resource management framework
that autoscales CPUs for microservice applications with latency SLOs.
It uses a lightweight learned controller at the application level to
assist agile per-microservice controllers, practically saving CPU
resources without violating SLOs.
Zhiying Xu, Francis Y. Yan, Rachee Singh, Justin T. Chiu, Alexander M. Rush, Minlan Yu
arXiv:2210.13763 (preprint), October 2022
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Teal is a deep learning-based traffic engineering (TE) scheme that
accelerated the TE optimization on large WANs by several orders of magnitude
while achieving near-optimal traffic allocation.
Francis Y. Yan, Hudson Ayers, Chenzhi Zhu, Sadjad Fouladi, James Hong,
Keyi Zhang, Philip Levis, Keith Winstein
USENIX Symposium on Networked Systems Design and Implementation (NSDI),
February 2020
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We built
Puffer, a free, publicly
accessible website that live-streams television channels and operates as a
randomized experiment of adaptive bitrate (ABR) algorithms.
As of June 2020, Puffer has attracted 120,000 real users and streamed 60 years
of video across the internet. Using Puffer, we developed an ML-based ABR algorithm,
Fugu, that robustly outperformed existing schemes by learning
in situ,
on real data from its actual deployment environment.
Francis Y. Yan, Jestin Ma, Greg D. Hill, Deepti Raghavan, Riad S. Wahby,
Philip Levis, Keith Winstein
USENIX Annual Technical Conference (ATC), July 2018
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Pantheon is a “training
ground” for congestion-control research and has
assisted four schemes from other research groups in publishing at
NSDI 2018
(
Copa and
Vivace),
ICML 2019
(
Aurora),
and SIGCOMM 2020 (
TCP-TACK).
It also enabled our own ML-based
congestion-control algorithm, Indigo, which was trained to imitate expert
congestion-control algorithms we created in emulation
and achieved good performance over the real internet.
