Explore the latest research from Facebook

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July 9, 2021 Zhizhen Zhong, Manya Ghobadi, Maximilian Balandat, Sanjeevkumar Katti, Abbas Kazerouni, Jonathan Leach, Mark McKillop, Ying Zhang
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BOW: First Real-World Demonstration of a Bayesian Optimization System for Wavelength Reconfiguration

We demonstrate a practical Bayesian Optimization system for wavelength reconfiguration at Facebook backbone. Our system uses a firewall for safe deployment.
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June 14, 2021 Anton Shkel, Alireza Mehrabani, Julius Kusuma
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A Configurable 60GHz Phased Array Platform for Multi-Link mmWave Channel Characterization

We present the Terragraph Sounder platform, developed to promote and enable research in mmWave propagation, systems, and networks, and is actively employed in research studies in over 13 institutions.
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June 14, 2021 Saeed Rashidi, Matthew Denton, Srinivas Sridharan, Sudarshan Srinivasan, Amoghavarsha Suresh, Jade Nie, Tushar Krishna
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Enabling Compute-Communication Overlap in Distributed Deep Learning Training Platforms

This work makes two key contributions. First, via real system measurements and detailed modeling, we provide an understanding of compute and memory bandwidth demands for DL compute and comms. Second, we propose a novel DL collective communication accelerator called Accelerator Collectives Engine (ACE) that sits alongside the compute and networking engines at the accelerator endpoint.
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June 11, 2021 Ryan M. Dreifuerst, Samuel Daulton, Yuchen Qian, Paul Parayil Varkey, Maximilian Balandat, Sanjay Kasturia, Anoop Tomar, Ali Yazdan Panah, Vish Ponnampalam, Robert W. Heath Jr
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Optimizing Coverage and Capacity in Cellular Networks using Machine Learning

In this paper, we develop and compare two approaches for maximizing coverage and minimizing interference by jointly optimizing the transmit power and downtilt (elevation tilt) settings across sectors. To evaluate different parameter configurations offline, we construct a realistic simulation model that captures geographic correlations.
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April 12, 2021 Yiting Xia, Ying Zhang, Zhizhen Zhong, Guanqing Yan, Chiun Lin Lim, Satyajeet Singh Ahuja, Soshant Bali, Alexander Nikolaidis, Kimia Ghobadi, Manya Ghobadi
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A Social Network Under Social Distancing: Risk-Driven Backbone Management During COVID-19 and Beyond

This paper presents Facebook’s risk-driven backbone management strategy to ensure high service performance throughout the COVID-19 pandemic.
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April 12, 2021 Anubhavnidhi Abhashkumar, Kausik Subramanian, Alexey Andreyev, Hyojeong Kim, Nanda Kishore Salem, Jingyi Yang, Petr Lapukhov, Aditya Akella, James Hongyi Zeng
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Running BGP in Data Centers at Scale

In this paper, we present Facebook’s BGP-based data center routing design and how it marries data center’s stringent requirements with BGP’s functionality. We present the design’s significant artifacts, including the BGP Autonomous System Number (ASN) allocation, route summarization, and our sophisticated BGP policy set.
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March 13, 2021 Edward J. Oughton, William Lehr, Konstantinos Katsaros, Ioannis Selinis, Dean Bubley, Julius Kusuma
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Revisiting Wireless Internet Connectivity: 5G vs Wi-Fi 6

In recent years, significant attention has been directed toward the fifth generation of wireless broadband connectivity known as ‘5G’, currently being deployed by Mobile Network Operators. Surprisingly, there has been considerably less attention paid to ‘Wi-Fi 6’, the new IEEE 802.1ax standard in the family of Wireless Local Area Network technologies with features targeting private, edge-networks. This paper revisits the suitability of cellular and Wi-Fi in delivering high-speed wireless Internet connectivity.
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February 11, 2021 Andrew J. Traverso, Jiani Huang, Thibault Peyronel, Guoce Yang, Tobias G. Tiecke, Maiken H. Mikkelsen
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Low-loss, Centimeter-scale Plasmonic Metasurface for Ultrafast Optoelectronics

Here, we demonstrate a low-loss plasmonic metasurface that can collect fast-modulated light with a 3 dB bandwidth exceeding 14 GHz and a 120o acceptance angle and convert it to a directional source with, to the best of our knowledge, a record-high overall efficiency of ∼30%.
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January 25, 2021 Julius Kusuma, Erik Boch
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Improving Rural Connectivity Coverage using Diffractive Non-Line of Sight (NLOS) Wireless Backhaul

We present a feasible condition for the use of diffractive NLOS, for a single obstacle with shallow diffraction angle, modest foliage loss, and moderate foliage, which we call NLOSv1.
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December 6, 2020 Qing Feng, Benjamin Letham, Hongzi Mao, Eytan Bakshy
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High-Dimensional Contextual Policy Search with Unknown Context Rewards using Bayesian Optimization

We develop effective models that leverage the structure of the search space to enable contextual policy optimization directly from the aggregate rewards using Bayesian optimization.
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