Explore the latest research from Facebook

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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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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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December 3, 2020 Pratheep Bondalapati, Abhishek Tiwari, Mustafa Emin Sahin, Qi Tang, Srishti Saraswat, Vishvas Suryakumar, Ali Yazdan Panah, Julius Kusuma, Amit Dubey
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SuperCell: A Wide-Area Coverage Solution Using High-Gain, High-Order Sectorized Antennas on Tall Towers

In this article we introduce a novel solution called SuperCell, which can improve the return on investment (ROI) for rural area network coverage. SuperCell offers two key technical features: it uses tall towers with high-gain antennas for wide coverage and high-order sectorization for high capacity.
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October 28, 2020 Frank Li, David Freeman
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Towards A User-Level Understanding of IPv6 Behavior

In this paper we establish empirical grounding on how both ordinary users and attackers use IPv6 in practice, compared with IPv4. Using data on benign and abusive accounts at a large online platform, we conduct user-centric analyses that assess the spatial and temporal properties of users’ IP addresses, and IP-centric evaluations that characterize the user populations on IP addresses.
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October 27, 2020 Timm Böttger, Ghida Ibrahim, Ben Vallis
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How the Internet reacted to Covid-19 – A perspective from Facebook’s Edge Network

The Covid-19 pandemic has led to unprecedented changes in the way people interact with each other, which as a consequence has increased pressure on the Internet. In this paper we provide a perspective of the scale of Internet traffic growth and how well the Internet coped with the increased demand as seen from Facebook’s edge network.
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October 26, 2020 Usama Naseer, Luca Niccolini, Udip Pant, Alan Frindell, Ranjeeth Dasineni, Theophilus A. Benson
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Zero Downtime Release: Disruption-free Load Balancing of a Multi-Billion User Website

In this paper, we leverage different components of the end-to-end networking infrastructure to prevent or mask any disruptions in face of releases. Zero Downtime Release is a collection of mechanisms used at Facebook to shield the end-users from any disruptions, preserve the cluster capacity and robustness of the infrastructure when updates are released globally.
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September 5, 2020 Santiago Pérez-Peña, Marta Castiella-Fernández, Pedro Velasco-de-la-Fuente, José Manuel Riera, Mateo Burgos-García, Pedro García-del-Pino, Luis Mendo, Julius Kusuma, Erik Boch
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Development of Measurement and Modeling Procedures of Diffractive near-LOS Wireless Links

When deploying a link to provide Internet connection in rural areas it is often necessary to surpass obstacles such as mountains covered by vegetation. However, in many situations, the diffraction angle θ is quite small (θ∽1°), achieving near-LOS (nLOS) links, and the possibility to establish a broadband link exploiting diffraction phenomenon arises.
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July 6, 2020 Edward J. Oughton, Tom Russell, Joel Johnson, Caglar Yardim, Julius Kusuma
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itmlogic: The Irregular Terrain Model by Longley and Rice

This paper describes the itmlogic package, which provides a Python implementation of the Longley-Rice Irregular Terrain Model. It implements the classic model, enabling the quantification of propagation loss over irregular terrain. itmlogic is capable of predicting the the statistics of propagation loss given input parameters such as transmitter and receiver heights, frequency, surface permittivity, climate zone, and terrain information.
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