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Thomas Begin

Associate 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: Building M7, Floor 1H, Room 26 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

Bio Research Résumé Projects Teaching Publications Misc.


Since September 2009, I am an Associate 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, along with 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 then I worked as a Postdoc at UCSC where I collaborated actively with Pr. Alexandre Brandwajn.

During the 2015-2016 academic year, I was on research leave at DIVA lab - University of Ottawa (uOttawa) - Canada. This leave was funded through a CNRS grant.

Current and past collaborators with whom I was privileged to work with:


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

Together with Alexandre Brandwajn, we deployed a web application that produces the solution of certain queueing systems using our resaerch material (e.g., G/M/c-like, M/G/1-like, and M/G/c-like queues). Click here to access the tool.


Curriculum Vitae

Télécharger mon CV en français en

Download my Résumé in English en


Scientific Projects (current and past)

    Scientific leader for ENSL of ANR REsilient and FLEXible Infrastructure for Open Networking.
    Scientific leader for ENSL of ANR DIStributed SDN COntrollers for rich and elastic services.
    Member of the common research lab between INRIA and Alcatel-Lucent Bell labs on "self-organising networks".
    Member of the ARC MobIle SubStItution Networks (MISSION) project (2010-2011, funded by INRIA).
    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)

  • Marija Stojanova, "Adaptative solution for multi-hop wireless networks" (2016-)
  • Huu Nghi Nguyen, "Admission control and controllers allocation for SDN networks", co-directed with Isabelle Guérin-Lassous and Anthony Busson (2014-2016)
  • Thiago Abreu, "Modeling and performance analysis of IEEE 802.11-based chain networks", co-directed with Isabelle Guérin-Lassous (2011-2014)
  • 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)
  • Doreid Ammar, "Knowledge plane for semantic networking", co-directed with Isabelle Guérin-Lassous (2009-2012)

Postdoc Students (current and past)

  • Guillaume Artero Gallardo, "Performance modeling of virtual switching systems"(2015-2016)

MSc Students (current and past)

  • Marija Stojanova, "Modeling CSMA/CA's capacity sharing in VANETs", co-directed with A. Busson (Feb - Jun 2016).
  • Zidong Su,"Performance Evaluation of Virtual Switch By Polling System", co-directed with B. Baynat (Feb - Jun 2016).
  • Omar Dahmani, "Experimental measurements on multi-hop wireless networks", co-directed with I. Guérin-Lassous (Feb - Jun 2015).
  • Thibaud Trolliet, "Implementing a MCMC method for a markovian model to simulate the dynamic workload a video on demand server", co-directed with P. Gonçalves (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", co-directed with P. Gonçalves (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 O. Glück and I. Guérin-Lassous (Feb - Jun 2010).
  • Aurélien Lafranchise, "Multiclass routing. Differentiated routing for real-time and elastic traffic", co-directed with I. Guérin-Lassous (Feb - Jun 2010).
  • The Quang Bui, "Failover wireless network in the crisis context", co-directed with P. Gonçalves (Apr - Nov 2010).
  • Van Dan Nguyen, "Multi-constrained routing: a first step toward a more realistic evaluation", co-directed with I. Guérin-Lassous (Apr - Nov 2010).


Enseignements  (Teaching info, sorry available only in French fr)

  • Réseaux Avancés (M2 SRIV RA)


Publications (HAL List)


Conferences - Workshops - Misc.



Member of Technical Program Committees:

  • IEEE LCN 2017 - 42nd IEEE Conference on Local Computer Networks
  • IEEE LCN 2016 - 41st IEEE Conference on Local Computer Networks
  • IEEE LCN 2015 - 40th IEEE Conference on Local Computer Networks
  • PE-WASUN 2015 - ACM Symposium on Performance Evaluation of Wireless Ad Hoc, Sensor, and Ubiquitous Networks
  • 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, Travelling, Cooking.

Citations I like about Research:

  • "In theory, theory and practice are the same. In practice, they're different." - Albert Einstein
  • "As gold which he cannot spend will make no man rich, so knowledge which he cannot apply will make no man wise". - Samuel Johnson
  • "Remember that all models are wrong; the practical question is how wrong do they have to be to not be useful." - George Box
  • "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
  • "Faire simple nous a pris beaucoup de temps." - Voltaire
  • "On passe la moitié de son temps à refaire ce que l'on n'a pas eu le temps de faire correctement". - Loi de Myers

Funny citations I like about Computer Science:

  • "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
  • 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
  • "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
  • "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
  • "Big data is like teenage sex: everyone talks about it, nobody really knows how to do it, everyone thinks everyone else is doing it, so everyone claims they are doing it." - Dan Ariely

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