UCBL

UCBL

CNRS

ENS-Lyon

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Thomas BEGIN

Assistant Professor at Université Claude Bernard, Lyon 1 (UCBL)
UFR d'Informatique, Bat. Nautibus
43 Bd du 11 novembre 1918
69622 Villeurbanne Cedex - France
Office UCBL (Bât. Nautibus): Room 226 marker
Phone UCBL: +33(0)4 72 44 81 91
E-Mail Address: firstname.name@univ-lyon1.fr


Research Team DANTE / INRIA since 2013 (previously RESO / INRIA)
Laboratoire de l'informatique du parallélisme (LIP) UMR 5668
Ecole Normale Supérieure de Lyon (ENSL)
46 allée d'Italie
69364 Lyon Cedex 07 - France
Office ENS (within IXXI building): Room B4 marker
Phone ENS: +33 (0)4 26 23 38 03
Fax ENS: +33 (0)4 72 72 80 80
E-Mail Address: firstname.name@ens-lyon.fr


Biography Research CV Projects Teaching Publications Misc.


Biography

Since September 2009, I am an Assistant Professor in the department of Computer Engineering at the Université Claude Bernard Lyon 1 (UCBL). I am also a member of the DANTE team (prior to 2013, I was part of the RESO team), a joint research team from the LIP laboratory and from INRIA located at the ENS Lyon and hosted by IXXI, where I do my research work.

I hold an Engineering Degree from Institut Superieur d'Electronique de Paris (ISEP), with a major in Telecommunications and a M.Sc. in Computer Networks from University Pierre et Marie Curie (UPMC). Between 2005 and 2008, I was pursuing a PhD in Computer Networks in the Networks and Performance Analysis group at the laboratory LIP6 under the supervision of Pr. Serge Fdida and Ass. Pr. Bruno Baynat. I graduated in December 2008, and I did a Postdoc at UCSC where I actively worked with Pr. Alexandre Brandwajn.

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Research Interests

My research is in the area of performance evaluation, queueing theory, stochastic modeling as applied to networks and computer systems. I am particularly interested in applying stochastic modeling and queueing theory to practical problems in computer systems.

queue1 queue2 queue3

We recently released a web application that allows a fast resolution of some classical queueing systems (e.g., G/M/c-like, M/G/1-like, and M/G/c-like queues). Have a look at it. (new)

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Curiculum Vitae PDF (en anglais seulement en)

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Scientific Projects (current and past)

  • ANR DISCO (new)
    Scientific leader for ENSL of ANR DIStributed SDN COntrollers for rich and elastic services.
  • SEMANTIC NETWORKING
    Member of the common research lab between INRIA and Alcatel-Lucent Bell labs on "self-organising networks".
  • ARC MISSION
    Member of the MobIle SubStItution Networks (MISSION) project (2010-2011, funded by INRIA).
  • ANR RESCUE
    Member of ANR RESeau Coordonné de sUbstitution mobilE (RESCUE) project (2010-2013, funded by ANR - VERSO call).
  • FP7 SAIL
    Member of Scalable and Adaptive Internet soLutions (SAIL) project (2010-2013, funded under 7th FWP).

PhD Students (current and past)

  • Doreid Ammar, "Knowledge plane for semantic networking", co-directed with Isabelle Guérin-Lassous (2009-2012)
  • Shubhabrata Roy, "A Complete Framework for Modelling Workload Volatility of a VoD System: a Perspective to Probabilistic Management", co-directed with Paulo Gonçalves (2011-2014)
  • Thiago Abreu, "Modeling and performance analysis of IEEE 802.11-based chain networks", co-directed with Isabelle Guérin-Lassous (2011-2014)
  • Huu Nghi Nguyen, "Admission control and controllers allocation for SDN networks", co-directed with Isabelle Guérin-Lassous and Anthony Busson (2014-)

MSc Students (current and past)

  • Thibaud Trolliet, "Implementing a MCMC method for a markovian model to simulate the dynamic workload a video on demand server" (Jul - Aug 2013).
  • Jean-Baptiste Delavoix, "Implementation and deployment on Grid5k of a markovian mo- del to simulate the dynamic workload a video on demand server" (Jul - Aug 2012).
  • Huu Nghi Nguyen, "Investigating the numerical behavior of matrix geometric methods for solving queueing systems" (Apr - Sep 2011).
  • Rémi Druihle, "Communications in parallel applications: the Hadoop study case", co-directed with Olivier Glück and Isabelle Guérin-Lassous (Feb - Jun 2010). Now PhD student at Orange Labs.
  • Aurélien Lafranchise, "Multiclass routing. Differentiated routing for real-time and elastic traffic", co-directed with Isabelle Guérin-Lassous (Feb - Jun 2010). Now Engineer at Snype Consulting.
  • The Quang Bui, "Failover wireless network in the crisis context", co-directed with Paulo Gonçalves (Apr - Nov 2010). Now PhD student at Université Clermont-Ferrand II.
  • Van Dan Nguyen, "Multi-constrained routing: a first step toward a more realistic evaluation", co-directed with Isabelle Guérin-Lassous (Apr - Nov 2010). Now Research engineer in MASCOTTE team (INRIA).

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Teaching (in french only fr)

Master Informatique à l'UCBL en
  • M2 Informatique RTS - Réseaux du futur

    Responsable du module : Fabrice Valois.
    J'enseigne en CM.
    • en CM : 4 séances consacrées aux méthodes d'évaluation de performances et à la modélisation des réseaux sans fil multisauts. Les supports de cours concernant cette partie vous seront remis en cours.

Licence Informatique à l'UCBL en
Master Informatique à l'ENS Lyon en

  • Réseaux

    Responsable du module : Anthony Busson.
    Autre intervenant : Lucie Martinet.
    J'enseigne en CM.
    • en CM : 6 séances consacrées aux méthodes d'évaluation de performances et à la modélisation des réseaux sans fil multisauts. Les supports de cours concernant cette partie vous seront remis en cours.

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Publications

Journals

2012 : A recurrent solution of Ph/M/c/N-like and Ph/M/c-like queues (new)
A. Brandwajn, T. Begin - Journal of Applied Probability, Volume 49, Issue 1, March 2012. (BIB)


2012 : Dynamic Resource Management in Clouds: A Probabilistic Approach
P. Gonçalves, S. Roy, T. Begin, P. Loiseau - IEICE Transactions on Communications (Invited Paper). (BIB)


2010 : High-level Approach to Modeling of Observed System Behavior
T. Begin, A. Brandwajn, B. Baynat, B. Wolfinger, S. Fdida - Performance Evaluation, Volume 67, Issue 5, May 2010, Pages 386-405. (BIB)


2009 : A DFO technique to Calibrate Queueing Models
T. Begin, B. Baynat, A. Brandwajn, F. Sourd - Computers & Operations Research, Volume 37, Issue 2, February 2010, Pages 273-281. (BIB)


2009 : Higher-order distributional properties in closed queueing networks
A. Brandwajn, T. Begin - Performance Evaluation, Volume 66, Issue 11, November 2009, Pages 607-620. (BIB)


Conferences - Workshops - Misc.

2013 : Hierarchical Modeling of IEEE 802.11 Multi-hop Wireless Networks (new)
T. Abreu, B. Baynat, T.Begin, I. Guérin-Lassous - ACM MSWIM 2013 - Barcelona (Spain). (BIB)


2013 : A note on the accuracy of several existing approximations for M/Ph/m queues (new)
T.Begin, A. Brandwajn - HSNCE 2013 - Kyoto (Japan). (BIB)


2013 : Multi-constrained routing algorithm: a networking evaluation
V. Nguyen, T.Begin, I. Guérin-Lassous - HSNCE 2013 - Kyoto (Japan). (BIB)


2013 : An MCMC Procedure for calibrating a VoD Workload Model
S. Roy, T.Begin, P. Gonçalves - GRETSI 2013 - Brest (France). (BIB)


2013 : A Complete Framework for Modelling and Generating Workload Volatility of a VoD System
S. Roy, T.Begin, P. Gonçalves - IEEE TRAC 2013 - Cagliari (Italy). (BIB)


2012 : Demonstrating a Versatile Model for VoD Buzz Workload in a Large Scale Distributed Network
J.-B. Delavoix, S. Roy, T.Begin, P. Goncalves - IEEE CloudNet12 2012 - Paris (France). (BIB)


2012 : Substitution Networks: Performance Collapse due to Overhead in Communication Times
T. Abreu, N. Nguyen, T.Begin, I. Guérin-Lassous, B. Baynat - AdhocNets 2012 - Paris (France). (BIB)


2012 : Knowledge-Based Admission Control: A Real-Time Performance Analysis
D. Ammar, J. Brochet, T. Begin, I. Guérin-Lassous, L. Noirie - IEEE LCN 2012 - Miami (Florida). (BIB)


2012 : KBAC: Knowledge-Based Admission Control
D. Ammar, T. Begin, I. Guérin-Lassous, L. Noirie - IEEE LCN 2012 - Miami (Florida). (BIB)


2012 : A Tool for solving Ph/M/c and Ph/M/c/N queues
T. Begin, A. Brandwajn - ACM QEST12 - London (Great Britain). (BIB)


2012 : An approximate solution for Ph/Ph/1 and Ph/Ph/1/N queues
A. Brandwajn, T. Begin - ACM/SPEC ICPE 2012 - Boston (Massachusetts). (BIB)


2012 : Contrôle d'Admission Basé sur un Plan de Connaissance
D. Ammar, T. Begin, I. Guérin-Lassous, L. Noirie - Algotel 2012 - La Grande Motte (France). (BIB)


2011 : Promoting Quality of Service in Substitution Networks with Controlled Mobility
T. Razafindralambo, T. Begin, M. Dias De Amorim, I. Guérin-Lassous, N. Mitton, D. Simplot-Rym - AdHocNow 2011 - Paderborn (Germany). (BIB)


2011 : Evaluation and Comparison of MBAC Solutions
D. Ammar, T. Begin, I. Guérin-Lassous, L. Noirie - IEEE LCN 2011 - Bonn (Germany). (BIB)


2011 : Performance Evaluation of a Single Node with General Arrivals and Service
A. Brandwajn, T. Begin - ASMTA 2011 - Venice (Italy). (BIB)


2011 : Une solution approchée pour les files Ph/Ph/1 et Ph/Ph/1/N
T. Begin, A. Brandwajn - Algotel 2011 - Cap Estérel (France). (BIB)


2011 : Contrôles d'admission basés sur des mesures : Evaluation et comparaison de solutions
D. Ammar, T. Begin, I. Guérin-Lassous, L. Noirie - CFIP 2011 - Sainte Maxime (France). (BIB)


2011 : A new tool for generating realistic Internet traffic in NS-3
D. Ammar, T. Begin, I. Guérin-Lassous - IEEE SIMUTools 2011 - Barcelona (Spain). (BIB)


2010 : Note sur la simulation d'une file M/G/1 selon la distribution du temps de service
T. Begin, A. Brandwajn - Algotel 2010 - Belle Dune (France). (BIB)


2009 : Considerations in Workload Characterization in Parallel Access Volumes
T. Begin, A. Brandwajn - CMG 2009 - Dallas (Texas, US). (BIB)


2009 : Note sur les performances de TCP dans un environnement sans-fil multisaut
M. Bezahaf, T. Begin, B. Baynat, S. Fdida - Poster CFIP 2009 - Strasbourg (France). (BIB)


2009 : On finding the right balance between fairness and efficiency in WiMAX scheduling through analytical modeling
S. Doirieux, B. Baynat, T. Begin - MASCOTS 2009 - London (England). (BIB)


2009 : Preliminary Results on a Simple Approach to G/G/c-like Queues
A. Brandwajn, T. Begin - ASMTA 2009 - Madrid (Spain). (BIB)


2009 : A Note on the Effects of Service Time Distribution in the M/G/1 Queue
A. Brandwajn, T. Begin - SPEC 2009 - Austin (Texas, US). (BIB)


2008 : Modelisation et Calibrage Automatiques de Systemes
Thèse de Doctorat de l'Université Pierre et Marie Curie, Décembre 2008. (BIB)


2008 : Note sur les temps de service résiduels
T. Begin, A. Brandwajn - CFIP 2008 - Les Arcs (France). (BIB)


2007 : High-level Approach to Modeling Observed System Behavior
T. Begin, A. Brandwajn, B. Baynat, B. Wolfinger, S. Fdida - Poster at Performance 2007 - Cologne (Germany). (BIB)


2007 : Towards an Automatic Modeling Tool for Observed System Behavior
T. Begin, A. Brandwajn, B. Baynat, B. Wolfinger, S. Fdida - EPEW 2007 - Berlin (Germany). (BIB)


2006 : Génération Automatique de Modèles Calibrés
T. Begin, B. Baynat, A. Brandwajn, S. Fdida, S. Kedad, F. Sourd - CFIP 2006 - Tozeur (Tunisie). (BIB)


2005 : Generate calibrated models in an automatic way - Master Thesis (2005 - 2006). (BIB)


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Miscellaneous

Program Committe:

  • PE-WASUN 2014 - ACM Symposium on Performance Evaluation of Wireless Ad Hoc, Sensor, and Ubiquitous Networks
  • PE-WASUN 2013 - ACM Symposium on Performance Evaluation of Wireless Ad Hoc, Sensor, and Ubiquitous Networks
  • PE-WASUN 2012 - ACM Symposium on Performance Evaluation of Wireless Ad Hoc, Sensor, and Ubiquitous Networks
  • NOTERE / CFIP 2012 - Nouvelles Technologies de la Répartition - Colloque francophone sur l’ingénierie des protocoles
  • IEEE CIF 2014 - IEEE International Workshop on Complex Information Flows

Reviewer for journals and conferences:

  • COR - Computers & Operations Research
  • JPDC - Journal of Parallel and Distributed Computing
  • TMC - IEEE Transactions on Mobile Computing
  • AMM - Applied Mathematical Modeling
  • OR - Operations Research
  • RO - RAIRO-Operations Research
  • CL - IEEE Communications Letters
  • PERCOM 2010 - IEEE International Conference on Pervasive Computing and Communications
  • IPDPS 2011 - IEEE International Parallel & Distributed Processing Symposium

Recommanded links (mostly in french):

Personnal interests: Tennis.

Citations I like about computer science:

  • Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the universe trying to build bigger and better idiots. So far, the universe is winning." - Rick Cook
  • "I have always wished for my computer to be as easy to use as my telephone; my wish has come true because I can no longer figure out how to use my telephone." - Bjarne Stroustrup
  • "I think Microsoft named .Net so it wouldn’t show up in a Unix directory listing." - Oktal
  • "Fine, Java MIGHT be a good example of what a programming language should be like. But Java applications are good examples of what applications SHOULDN’T be like." - pixadel
  • "Perl – The only language that looks the same before and after RSA encryption." - Keith Bostic
  • "Sometimes it pays to stay in bed on Monday, rather than spending the rest of the week debugging Monday's code." - Christopher Thompson
  • "Debugging is twice as hard as writing the code in the first place. Therefore, if you write the code as cleverly as possible, you are, by definition, not smart enough to debug it." - Brian W. Kernighan
  • "To iterate is human, to recurse divine." - L. Peter Deutsch
  • "Always code as if the guy who ends up maintaining your code will be a violent psychopath who knows where you live." - Martin Golding
  • "There are two ways of constructing a software design. One way is to make it so simple that there are obviously no deficiencies. And the other way is to make it so complicated that there are no obvious deficiencies." - C.A.R. Hoare
  • "In theory, theory and practice are the same. In practice, they're different." - Albert Einstein
  • "Computer science is no more about computers than astronomy is about telescopes." - Edsger Wybe Dijkstra
  • "Everything should be made as simple as possible, but not simpler." - Albert Einstein
  • "Be nice to nerds. Chances are you'll end up working for one." - Bill Gates
  • "If you think your teacher is tough, wait until you get a boss. He doesn't have tenure." - Bill Gates
  • "Life is not fair; get used to it." - Bill Gates
  • "Life is not divided into semesters. You don't get summers off and very few employers are interested in helping you find yourself." - Bill Gates
  • "Before you were born, your parents weren't as boring as they are now. They got that way from paying your bills, cleaning your clothes and listening to you talk about how cool you thought you were. So before you save the rain forest from the parasites of your parent's generation, try delousing the closet in your own room." - Bill Gates
  • "Faire simple nous a pris beaucoup de temps." - Voltaire

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