Gwendal SIMON





Coordonnées :


+33 2 99 12 70 48


IMT Atlantique (Campus de Rennes)
2 rue de la Chataigneraie - CS 17607
35576 Cesson Sevigne Cedex - France


Gwendal Simon is a Full Professor at IMT Atlantique, an elite technological university in France. His research interests include multimedia delivery systems (video and gaming) and network management. He has written more than 80 scientific papers, 4 of them having been awarded as best papers in prestigious conferences. His impactful research has also resulted in 9 patents, several software and datasets (including the awarded Solipsis p2p virtual world), and contributions to multiple innovative collaborative projects (including 2 awarded projects). He has advised 13 PhD students and he has directed a research lab (including 7 post-docs and research engineers). He graduated from University Rennes 1 (France). He obtained a PhD in Computer Science in 2004 and a Habilitation in 2015. From 2001 to 2006 he was a researcher at the research center of Orange (then France Telecom). Since 2006, he has been Associate Professor, and then a Full Professor at IMT Atlantique. He was a visiting researcher at University of Waterloo in 2011/2012 and he was a visiting scientist at Adobe in 2018/2019.

Current Projects

  • the CDN and Net Neutrality project funded by Orange Labs (2014-2016)

  • the SDN-LTE project funded by Orange Labs for the PhD thesis of Malla Reddy Salma (2012-2015)

Past Research Projects

  • the Solipsis project funded by ANR RIAM on user-generated peer-to-peer virtual spaces (2006-2009)

  • the HyHoc project, a direct collaboration with Technion Institute (Israel) on hybrid ad-hoc networks (2004-2006)
  • the Mardi agreement between France Telecom and INRIA Gyroweb team (2006-2008)

  • Contrib2.0 : on collaboration in large-scale groups (2007)
  • Dispairse : on peer-to-peer collaborative backup systems (2007)

  • the LocaliPeer project, a Cifre agreement with Thomso n for the PhD thesis of Yiping Chen (2007-2010)

  • the P2PIm@ges project funded by DGE on peer-to-peer streaming systems (2007-2009) best demo award at NEM summit 2009

  • the Pinfish project, a direct collaboration with Orange Labs Beijing (China) on network-friendly IPTV (2009-2011)

  • the ViPEER  project funded by ANR Verso on distributed content Delivery Networks for intra-domain video delivery (2009-2012)

  • the CNG  project funded by FP7 European Commission on peer-to-peer multimedia insertion in virtual worlds (2009-2012)

  • the Zewall project funded by DGE on collaborative TV leveraging on crowd journalism (2011-2013) best demo award at Trophées Loading the Future 2012

  • the ICN project, a Cifre agreement with Orange Labs for the PhD thesis of Wei You (2010-2013)

  • the Odisea project funded by DGE on large-scale distributed storage and backup (2011-2014)

  • the MOOC Network project funded by Google (2013-2014)

Current PhD students

  • Maha Mdini (with Astellia)
  • Romuald Corbel (with Orange Labs)


Past PhD students

  • Bing Han (2006 - 2009) : « Distributed Query Allocation in Wireless Sensor Networks », now researcher at Akka
  • Yiping Chen (with Technicolor 2007 - 2010) : « Locality-aware Peer-to-Peer applications: Toward the network-friendly content distribution », now research engineer at Orange Labs
  • Yaning Liu (2007 - 2011): « Autour des systèmes pair-à-pair de diffusion de flux vidéos : conception de nouvelles fonctionnalités » now researcher at JCP-Consult 
  • Zhe Li (2009 - 2013): « Optimisation d'un réseau de distribution de contenus géré par un opérateur réseau », now researcher at JCP-Consult
  • Jiayi Liu  (2009 - 2013): « Optimisation de la diffusion de flux vidéos en direct », now Associate-Professor at Xidian University
  • Wei You  (2010 - 2013): « A Content-Centric Networking Node for a Realistic Efficient Implementation and Deployment », now Associate-Professor at Xidian University
  • Karine Pires (2011 - 2015): « Delivery, Transcoding and Neutrality on Large Live Streaming Systems », now Research Engineer
  • Alassane Samba (2014 - 2018)
  • Xavier Corbillon (2015 - 2018)
  • Mariem Ben Yahia (2015 - 2019)
  • Patrice Houzé  (with B-Com) and Malla Reddy Sama (with Orange)

Past post-doc

  • Jimmy Leblet (2007 - 2009), now tenured Associate-Professor at Université Lyon 3
  • Eliya Buyukkaya (2010 - 2012), now research and teaching fellow at University Rennes 1
  • Fen Zhou (2010 - 2012), now tenured Associate-Professor at University Avignon
  • Ramon Aparicio Pardo (2013 - 2015), now tenured Associate-Professor at University Nice
  • Kun He (2016-2017)

Job offers

Please contact me by email if you are interested in any of these positions.

PhD position at Blacnkut and IMT Atlantique

We are looking for an enthusiastic computer science nerd for a unique position: A mixed start-up/academic PhD job on cloud gaming. The main idea behind cloud gaming is that the game engine (the part of the game software in charge of rendering the game) runs "in the cloud", i.e., on commoditized servers in data-centers; it gets the gamer actions from the Internet and it delivers the output video as a video stream, which is also delivered through the Internet to the display device of the gamer.

Your mission will be to optimize the orchestration of game engines in large-scale cloud infrastructure so that the gaming experience is maximized and the operation costs are minimized. Various techniques should be explored to address this problem from both a theoretical and a practical perspective. In particular, the work includes the prediction of the computing requirements of a game, the characterization of games with respect to their genre, the placement of virtual machines in data-centers, and the formal problem formulation.

Blacknut is the most promising french SME working for cloud gaming. The Blacknut service provides a subscription-based unlimited access to a large catalog of games. The cutting-edge cloud platform targets casual gamers. The Blacknut team is located at Rennes.

IMT Atlantique is one of the top master-degree engineering school (Grande Ecole) in France. Within IMT Atlantique, the Adopnet  lab on the Rennes campus, is a leading research lab worldwide in this area. Researchers have a prominent position in the multimedia network and system community. The goal of the lab is to bring the scientific fundamentals to the development of innovative multimedia applications.

The position is a great match for a Master-degree in engineering (computer science, networks, operation research, mathematics), either a geek not afraid of math, or a mathematician not afraid of coding, but ideally somebody who does both math and code. The position is an opportunity to get a valuable experience in a fast-developing start-up, to become a recognized academic researcher, and to obtain a PhD diploma at the end. 

You will work alternatively at Blacknut and IMT Atlantique, in Rennes. You will formally be a Blacknut employee (and so deeply involved into the energizing atmosphere of Blacknut) and will still get a student status through the CIFRE convention. If everything works as planned, you will get an official PhD diploma from IMT Atlantique after three years.

Activities on immersive multimedia

Our activities related to the streaming of 360-degree videos and virtual reality applications include:

  • A proposal based on adaptive streaming to prepare and deliver videos so that what the user watches (viewport) represents most of the stream bit-rate. This proposal has led to publications: 
    • Xavier Corbillon, Alisa Devlic, Jacob Chakareski, and Gwendal Simon. "Viewport-Adaptive Navigable 360-Degree Video Delivery", in Proc. of IEEE ICC, 2017. (PDF)
    • Xavier Corbillon, Alisa Devlic, Jacob Chakareski, and Gwendal Simon. "Optimal 360-Degree Video Representation for Viewport-Adaptive Streaming" (submitted)
  • A dataset of more than 50 users watching five 360-degree videos in real conditions. We measure how they move their heads and we obtain statistical models of user behaviors. Here are details:
    • Xavier Corbillon, Francesca De Simone, Gwendal Simon, and Pascal Frossard. (submitted)
  • A set of software tools to manipulate and prepare videos for viewport-adaptive streaming. The software takes any 360-degree video in input and outputs another 360-degree video, which is mapped into another geometric projections and is tiled with various encoding qualities.
  • Contributions to MPEG standard group, including:
    • Viewport-adaptive signalling in DASH
    • Encoding experiment in OMAF

The team consists of Xavier CORBILLON and Gwendal SIMON. Collaborators include Jacob CHAKARESKI (University of Alabama), Alisa DEVLIC (Huawei), and Pascal FROSSARD (EPFL).

Other key information

Research team:  Adopnet within IRISA.

I am a teacher in a "grande école", where education matters. I am a strong advocate of "active learning", as illustrated by my involvement in project-oriented teaching, two academic papers in this area, and my contributions to Massive Online Open Courses (MOOC). I am chevalier of the Palmes Académiques (french distinction for contributions in pedagogy).

I am a reviewer. I am in the board of IEEE MMTC R-letters. I am also in the Program Committee of well-known conferences, including IEEE Globecom, IEEE ICC, Packet Video, ACM Netgames, ACM MMSys, ACM Nossdav, and ACM Multimedia.

Other communities duties include my contribution to an ACM project related to the reproducibility of results in scientific publication and to the IEEE Multimedia Cloud Computing Interest Group (MCCIG).

I have been in the PhD defense jury of several students who I have not tutored: Eliya Buyukkaya (2011), Samuel Bernard (2011), Daouda Ahmat (2014), Yacine Benchaïb (2014), Leonardo Linguaglossa (2016 - reviewer), Andrea Araldo (2016 - reviewer), Nassima Bouzakaria (2017 - reviewer), and Sefano D'Aronco (2018 - reviewer). I have also been in the HDR defense jury of Cyril Concolato (2016) and Christoph Neumann (2016).

Some other web resources: