Nombre de documents


Jonathan Ledy

Research Topics

Vehicular Adhoc NETworks simulations

  • Propagation models
  • Routing protocols
  • Cross-layering
  • Link-failure prediction


My thesis deals with the optimization of communications in vehicular networks by using a realistic simulation platform. A realistic environment implies the usage of mobility models adapted to vehicles and also highly detailed physical models (channel models and digital transmission chain). The first part of our work has consisted in the design of a realistic simulation platform dedicated to VANETs (Vehicular Ad hoc NETworks). This platform has been completed by a semi-deterministic propagation model which we have designed. This model called UM-CRT has the advantage to have the same level of realism than a deterministic model while requiring much less computation time. This model has been validated by comparison with a deterministic ray tracing simulator. We then have used this platform to evaluate routing protocols. The efficiency of different ad hoc routing protocols in realistic conditions has led us to focus our study on the family of reactive protocols. From this evaluation we have selected AODV (Ad hoc On demand Distance Vector) to which we have applied a cross-layer metric in order to reduce the performance degradation caused by the realistic environment. We then have used a tuning technique with reactive protocols. Finally, we have evaluated several SISO and MIMO physical layers. This work shows that only improvements combined at different levels (physical and network) can yield a significant increase in performance.

Article dans une revue4 documents

  • Rodolfo Orjuela, Jonathan Ledy, Jean-Philippe Lauffenburger, Michel Basset. LES VEHICULES AUTONOMES ET LE RISQUE TECHNOLOGIQUE : D'OU VIENT-ON ET OU VA-T-ON ? . RISEO - risques, études et observations, 2018, 2018-1 Les véhicules autonomes. 〈hal-01816895〉
  • Tiguiane Yélémou, Jonathan Ledy, Benoit Hilt, Philippe Meseure, Anne-Marie Poussard. Analysis of Ber-Based on-Demand and Link State Routing Protocols under Realistic Conditions. ARPN Journal of Engineering and Applied Sciences, Asian Research Publishing Network, 2017, 12 (5), pp.1469-1482. 〈〉. 〈hal-01525489〉
  • Jonathan Ledy, Benoît Hilt, Hervé Boeglen, Anne-Marie Poussard, Frédéric Drouhin, et al.. Impact of realistic simulation on the evaluation of mobile Ad-hoc routing protocols. IEEE Transactions on Emerging Topics in Computing, Institute of Electrical and Electronics Engineers, 2015, 3 (3), pp.317 - 334. 〈10.1109/TETC.2015.2405478〉. 〈hal-01249106〉
  • Jonathan Ledy, Hervé Boeglen, Anne-Marie Poussard, Benoit Hilt, Rodolphe Vauzelle. A Semi-Deterministic ChannelModel for VANETs Simulations. Hindawi International Journal of Vehicular Technology, 2012, pp.1-8. 〈10.1155/2012/492105〉. 〈hal-00851951〉

Communication dans un congrès9 documents

  • Jonathan Ledy, Hervé Boeglen, Anne-Marie Poussard, Benoit Hilt, Rodolphe Vauzelle. A Semi-Deterministic Channel Model for VANETs Simulations. International Journal of Vehicular Technology, Jan 2012, New York, United States. Hindawi, Volume 2012, pp.Article ID 492105, 2012, 〈10.1155/2012/492105〉. 〈hal-00658965〉
  • Tiguiane Yélémou, Jonathan Ledy, Benoit Hilt, Anne-Marie Poussard, Philippe Meseure. Performance comparison of BER-based routing protocols under realistic conditions. 36th IEEE Conference on Local Computer Networks, Oct 2011, Bonn, Germany. 4 p., 2011. 〈hal-00633732〉
  • Hervé Boeglen, Benoit Hilt, Pascal Lorenz, Jonathan Ledy, Anne-Marie Poussard, et al.. A survey of V2V channel modeling for VANET simulations. The 8th International Conference on Wireless On-demand Network Systems and Services - WONS 2011, Jan 2011, Bardonecchia, Italy. 〈hal-00658989〉
  • Slimane Bouhadi, Jonathan Ledy, Anne-Marie Poussard. UM-CRT model optimisation. Journées Nationales des Communications dans les Transports Terrestres, Nov 2011, Colmar, France. 〈hal-00658998〉
  • Rodolphe Vauzelle, Jonathan Ledy, Anne-Marie Poussard, Hervé Boeglen, Benoit Hilt. Realistic wireless communication simulations for VANETS. Electronics, Computers and Artificial Intelligence - ECAI 2011 ­ International Conference - 4th Edition, Jun 2011, Piteşti, Romania. 〈hal-00677391〉
  • Jonathan Ledy, Hervé Boeglen, Anne-Marie Poussard, Benoit Hilt, Rodolphe Vauzelle. UM-CRT : Un modèle de canal semi-déterministe pour les VANETs. 17e Journées Nationales Micro-ondes, May 2011, Brest, France. pp.4E-14, 2011. 〈hal-00658995〉
  • Jonathan Ledy, Hervé Boeglen, Abdelhafid Abouaissa, Benoit Hilt, Rodolphe Vauzelle. Impact d'un modèle de propagation réaliste sur un protocole de routage pour les VANETs. GDR ONDES et GDR ISIS, Mar 2010, Paris, France. 〈hal-00658971〉
  • Jonathan Ledy, Mahamadi Savadogo, Hervé Boeglen, Anne-Marie Poussard, Benoit Hilt, et al.. A semi-deterministic channel model for VANETs simulations. Intelligent Transport Systems Telecommunications 2010, Nov 2010, Kyoto, Japan. pp.A Semi-Deterministic Channel Model for VANETs Simulations, 2010. 〈hal-00658982〉
  • Jonathan Ledy, Hervé Boeglen, Benoit Hilt, Hafid Abouaissa, Rodolphe Vauzelle. An Enhanced AODV Protocol for VANETs with Realistic Radio Propagation Model Validation. ITST 2009, Oct 2009, Lille, France. pp.5, 2009. 〈hal-00476738〉