Now showing items 1-20 of 35

  • A lightweight algorithm for traffic filtering over sliding windows 

    Sanjuàs Cuxart, Josep; Barlet Ros, Pere; Solé Pareta, Josep; Andriuzzi, Gabriella (2012)
    Conference report
    Restricted access - publisher's policy
    The problem of testing whether a packet belongs to a set of filtered addresses has been traditionally addressed using Bloom filters. They have a small memory footprint and require few memory accesses per query and insertion, ...
  • ALLIANCE Project: Architecting a knowledge-defined 5G-enabled network infrastructure 

    Careglio, Davide; Spadaro, Salvatore; Cabellos Aparicio, Alberto; Lázaro Villa, José Antonio; Perelló Muntan, Jordi; Barlet Ros, Pere; Gené Bernaus, Joan M.; Paillissé Vilanova, Jordi (Institute of Electrical and Electronics Engineers (IEEE), 2018)
    Conference report
    Open Access
    Leaving the current 4th generation of mobile communications behind, 5G will represent a disruptive paradigm shift integrating access networks, ultra-high capacity access/metro/core optical networks and intra-datacentre ...
  • Analysis of YouTube user experience from passive measurements 

    Dimopoulos, Georgios; Barlet Ros, Pere; Sanjuas Cuxart, Josep (Institute of Electrical and Electronics Engineers (IEEE), 2013)
    Conference report
    Restricted access - publisher's policy
    In this paper, we analyze the YouTube service and the traffic generated from its usage. The purpose of this study is to identify by strictly using passive measurements the information that can be used as metrics or indicators ...
  • An autonomic traffic classification system for network operation and management 

    Carela Español, Valentín; Barlet Ros, Pere; Mulla Valls, Oriol; Solé Pareta, Josep (2015-07-01)
    Article
    Open Access
    Traffic classification is an important aspect in network operation and management, but challenging from a research perspective. During the last decade, several works have proposed different methods for traffic classification. ...
  • A NetFlow/IPFIX implementation with OpenFlow 

    Suárez-Varela Maciá, José Rafael; Barlet Ros, Pere; Carela Español, Valentín (2017)
    Conference report
    Open Access
  • A novel approach to security enhancement of chaotic DSSS systems 

    Nguyen, Xuan Quyen; Nguyen, Chuyen T.; Barlet Ros, Pere; Dojen, Reiner (Institute of Electrical and Electronics Engineers (IEEE), 2016)
    Conference report
    Open Access
    In this paper, we propose a novel approach to the enhancement of physical layer security for chaotic direct-sequence spread-spectrum (DSSS) communication systems. The main idea behind our proposal is to vary the symbol ...
  • A practical approach to portscan detection in very high-speed links 

    Mikians, Jakub; Barlet Ros, Pere; Sanjuàs Cuxart, Josep; Solé Pareta, Josep (Springer Verlag, 2011)
    Conference report
    Restricted access - publisher's policy
    Port scans are continuously used by both worms and human attackers to probe for vulnerabilities in Internet facing systems. In this paper, we present a new method to efficiently detect TCP port scans in very high-speed ...
  • A streaming flow-based technique for traffic classification applied to 12 + 1 years of Internet traffic 

    Carela Español, Valentín; Barlet Ros, Pere; Bifet Figuerol, Albert Carles; Fukuda, Kensuke (2016-10)
    Article
    Open Access
    The continuous evolution of Internet traffic and its applications makes the classification of network traffic a topic far from being completely solved. An essential problem in this field is that most of proposed techniques ...
  • A survey on web tracking: mechanisms, implications, and defenses 

    Bujlow, Tomasz; Carela Español, Valentín; Solé Pareta, Josep; Barlet Ros, Pere (2017-08-01)
    Article
    Open Access
    Privacy seems to be the Achilles' heel of today's web. Most web services make continuous efforts to track their users and to obtain as much personal information as they can from the things they search, the sites they visit, ...
  • Automating root-cause analysis of network anomalies using frequent itemset mining 

    Paredes Oliva, Ignasi; Dimitropoulos, Xenofontas; Molina, Maurizio; Barlet Ros, Pere; Brauckhoff, Daniela (ACM Press. Association for Computing Machinery, 2010)
    Conference lecture
    Open Access
    Finding the root-cause of a network security anomaly is essential for network operators. In our recent work [1, 5], we introduced a generic technique that uses frequent itemset mining to automatically extract and summarize ...
  • Cuckoo sampling: robust collection of flow aggregates under a fixed memory budget 

    Sanjuàs Cuxart, Josep; Barlet Ros, Pere; Duffield, Nick; Kompella, Ramana (Institute of Electrical and Electronics Engineers (IEEE), 2012)
    Conference report
    Restricted access - publisher's policy
    Collecting per-flow aggregates in high-speed links is challenging and usually requires traffic sampling to hand le peak rates and extreme traffic mixes. Static selection of sam pling rates is problematic, since ...
  • Detecting network performance anomalies with contextual anomaly detection 

    Dimopoulos, Giorgos; Barlet Ros, Pere; Dovrolis, Constantine; Leontiadis, Ilias (Institute of Electrical and Electronics Engineers (IEEE), 2017)
    Conference report
    Open Access
    Network performance anomalies can be defined as abnormal and significant variations in a network's traffic levels. Being able to detect anomalies is critical for both network operators and end users. However, the accurate ...
  • Distributed Sampling for On-line SLA Assessment 

    Serral Gracià, René; Barlet Ros, Pere; Domingo Pascual, Jordi (IEEE Communications Society, 2008-09-30)
    Conference report
    Open Access
    New business infrastructures over the Internet pose a new set of traffic constraints. In particular, multimedia and interactive contents require guarantees of bandwidth and delivery time. The broad deployment and real-time ...
  • Empirical analysis of traffic to establish a profiled flow termination timeout 

    Molina Rodriguez, Juan; Carela Español, Valentín; Barlet Ros, Pere; Hoffmann, Ralf; Degner, Klaus (Institute of Electrical and Electronics Engineers (IEEE), 2013)
    Conference report
    Restricted access - publisher's policy
    The exponential increase of bandwidth on the Internet has made the online traffic classification a highly exigent task. All the operations in the classification process must be efficiently implemented in order to deal with ...
  • Every timestamp counts: accurate tracking of network latencies using reconcilable difference aggregator 

    Fu, Yongquang; Barlet Ros, Pere; Li, Dongsheng (2017-11-07)
    Article
    Open Access
    IEEE User-facing services deployed in data centers must respond quickly to user actions. The measurement of network latencies is of paramount importance. Recently, a new family of compact data structures has been proposed ...
  • FaRNet: fast recognition of high multi-dimensional network traffic patterns 

    Paredes Oliva, Ignasi; Barlet Ros, Pere; Dimitropoulos, Xenofontas (ACM, 2013)
    Conference lecture
    Restricted access - publisher's policy
    Extracting knowledge from big network traffic data is a matter of foremost importance for multiple purposes ranging from trend analysis or network troubleshooting to capacity planning or traffic classification. An extremely ...
  • Flow monitoring in software-defined networks: finding the accuracy/performance tradeoffs 

    Suárez Varela, José; Barlet Ros, Pere (2018-04-22)
    Article
    Restricted access - publisher's policy
    In OpenFlow-based Software-Defined Networks, obtaining flow-level measurements, similar to those provided by NetFlow/IPFIX, is challenging as it requires to install an entry per flow in the flow tables. This approach does ...
  • Identifying the root cause of video streaming issues in mobile devices 

    Dimopoulos, Georgios; Leontiadis, Ilias; Barlet Ros, Pere; Papagiannaki, Konstantina; Steenkiste, Peter (Association for Computing Machinery (ACM), 2015)
    Conference report
    Restricted access - publisher's policy
    Video streaming on mobile devices is prone to a multi-tude of faults and although well established video Qual-ity of Experience (QoE) metrics such as stall frequencyare a good indicator of the problems perceived by theuser, ...
  • Independent comparison of popular DPI tools for traffic classification 

    Bujlow, Tomasz; Carela Español, Valentín; Barlet Ros, Pere (2015-01-15)
    Article
    Open Access
    Deep Packet Inspection (DPI) is the state-of-the-art technology for traffic classification. According to the conventional wisdom, DPI is the most accurate classification technique. Consequently, most popular products, ...
  • Is our ground-truth for traffic classification reliable? 

    Carela Español, Valentín; Bujlow, Tomasz; Barlet Ros, Pere (2014)
    Conference report
    Restricted access - publisher's policy
    The validation of the different proposals in the traffic classification literature is a controversial issue. Usually, these works base their results on a ground-truth built from private datasets and labeled by techniques ...