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Monitoring the traffic volumes of elephant flows, including the total byte count per flow, is a fundamental capability for online network measurements. We present an asymptotically optimal algorithm for solving this problem in terms of both…

Data Structures and Algorithms · Computer Science 2017-01-17 Ran Ben Basat , Gil Einziger , Roy Friedman , Yaron Kassner

The majority of Internet traffic is caused by a relatively small number of flows (so-called elephant flows). This phenomenon can be exploited to facilitate traffic engineering: resource-costly individual flow forwarding entries can be…

Networking and Internet Architecture · Computer Science 2021-07-20 Piotr Jurkiewicz

We propose in this paper an on-line algorithm based on Bloom filters for identifying large flows in IP traffic (a.k.a. elephants). Because of the large number of small flows, hash tables of these algorithms have to be regularly refreshed.…

Networking and Internet Architecture · Computer Science 2009-06-22 Youssef Azzana , Yousra Chabchoub , Christine Fricker , Fabrice Guillemin , Philippe Robert

Several Traffic Engineering (TE) techniques based on SDN (Software-defined networking) proposed to resolve flow competitions for network resources. However, there is no comprehensive study on the probability distribution of their…

Networking and Internet Architecture · Computer Science 2019-11-27 Aymen Hasan Alawadi , Maiass Zaher , Sándor Molnár

Network traffic classification, particularly elephant flow detection, faces significant challenges when deployed across heterogeneous network environments. While existing approaches demonstrate high accuracy within single domains, they…

Networking and Internet Architecture · Computer Science 2025-12-25 Tabidah Usmani , Sara Zahid , Amna Javaid

Currently, the wide spreading of real-time applications such as VoIP and videos-based applications require more data rates and reduced latency to ensure better quality of service (QoS). A well-designed traffic classification mechanism plays…

Networking and Internet Architecture · Computer Science 2023-06-26 Getahun Wassie Geremew , Jianguo Ding

Efficient algorithms and techniques to detect and identify large flows in a high throughput traffic stream in the SDN match-and-action model are presented. This is in contrast to previous work that either deviated from the match and action…

Networking and Internet Architecture · Computer Science 2017-02-28 Yehuda Afek , Anat Bremler-Barr , Shir Landau Feibish , Liron Schiff

Collecting flow records is a common practice of network operators and researchers for monitoring, diagnosing and understanding a network. Traditional tools like NetFlow face great challenges when both the speed and the complexity of the…

Networking and Internet Architecture · Computer Science 2018-12-06 Zongyi Zhao , Xingang Shi , Xia Yin , Zhiliang Wang

Detecting elephants through seismic signals is an emerging research topic aimed at developing solutions for Human-Elephant Conflict (HEC). Despite the promising results, such solutions heavily rely on manual classification of elephant…

Machine Learning · Computer Science 2025-09-10 Jaliya L. Wijayaraja , Janaka L. Wijekoon , Malitha Wijesundara

The detection of network flows that send excessive amounts of traffic is of increasing importance to enforce QoS and to counter DDoS attacks. Large-flow detection has been previously explored, but the proposed approaches can be used on…

Networking and Internet Architecture · Computer Science 2018-07-17 Hao Wu , Hsu-Chun Hsiao , Daniele E. Asoni , Simon Scherrer , Adrian Perrig , Yih-Chun Hu

Safety-critical applications such as autonomous vehicles and social robots require fast computation and accurate probability density estimation on trajectory prediction. To address both requirements, this paper presents a new normalizing…

Computer Vision and Pattern Recognition · Computer Science 2023-08-21 Takahiro Maeda , Norimichi Ukita

This study investigates the efficacy of machine learning models in network security threat detection through the critical lens of partial versus complete flow information, addressing a common gap between research settings and real-time…

Machine Learning · Computer Science 2025-07-01 Adrian Pekar , Richard Jozsa

Identifying animals from a large group of possible individuals is very important for biodiversity monitoring and especially for collecting data on a small number of particularly interesting individuals, as these have to be identified first…

Computer Vision and Pattern Recognition · Computer Science 2018-12-12 Matthias Körschens , Björn Barz , Joachim Denzler

A new method of estimating some statistical characteristics of TCP flows in the Internet is developed in this paper. For this purpose, a new set of random variables (referred to as observables) is defined. When dealing with sampled traffic,…

Networking and Internet Architecture · Computer Science 2009-06-26 Yousra Chabchoub , Christine Fricker , Fabrice Guillemin , Philippe Robert

Event cameras are novel bio-inspired sensors that offer advantages over traditional cameras (low latency, high dynamic range, low power, etc.). Optical flow estimation methods that work on packets of events trade off speed for accuracy,…

Computer Vision and Pattern Recognition · Computer Science 2024-03-05 Shintaro Shiba , Yoshimitsu Aoki , Guillermo Gallego

We propose a new framework to estimate the evolution of an ensemble of indistinguishable agents on a hidden Markov chain using only aggregate output data. This work can be viewed as an extension of the recent developments in optimal mass…

Optimization and Control · Mathematics 2021-07-01 Isabel Haasler , Axel Ringh , Yongxin Chen , Johan Karlsson

State-of-the-art scene flow algorithms pursue the conflicting targets of accuracy, run time, and robustness. With the successful concept of pixel-wise matching and sparse-to-dense interpolation, we push the limits of scene flow estimation.…

Computer Vision and Pattern Recognition · Computer Science 2019-10-30 René Schuster , Oliver Wasenmüller , Christian Unger , Georg Kuschk , Didier Stricker

Current probabilistic flow-size monitoring can only detect heavy hitters (e.g., flows utilizing 10 times their permitted bandwidth), but cannot detect smaller overuse (e.g., flows utilizing 50-100% more than their permitted bandwidth).…

Networking and Internet Architecture · Computer Science 2021-02-03 Simon Scherrer , Che-Yu Wu , Yu-Hsi Chiang , Benjamin Rothenberger , Daniele E. Asoni , Arish Sateesan , Jo Vliegen , Nele Mentens , Hsu-Chun Hsiao , Adrian Perrig

Optical flow estimation is a fundamental and long-standing visual task. In this work, we present a novel method, dubbed HMAFlow, to improve optical flow estimation in challenging scenes, particularly those involving small objects. The…

Computer Vision and Pattern Recognition · Computer Science 2024-11-18 Dianbo Ma , Kousuke Imamura , Ziyan Gao , Xiangjie Wang , Satoshi Yamane

Measuring network flow sizes is important for tasks like accounting/billing, network forensics and security. Per-flow accounting is considered hard because it requires that many counters be updated at a very high speed; however, the large…

Networking and Internet Architecture · Computer Science 2007-10-07 Yi Lu , Andrea Montanari , Balaji Prabhakar
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