Jonathan Ledy
Présentation
Vehicular Adhoc NETworks simulations 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.Research Topics
Thesis
Publications
Publications
A belief function-based forecasting link breakage indicator for VANETsWireless Networks, 2019, ⟨10.1007/s11276-019-01973-0⟩ |
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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, 1 |
Analysis of Ber-Based on-Demand and Link State Routing Protocols under Realistic ConditionsJournal of Engineering and Applied Sciences, 2017, 12 (5), pp.1469-1482 |
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Impact of realistic simulation on the evaluation of mobile Ad-hoc routing protocolsIEEE Transactions on Emerging Topics in Computing, 2015, 3 (3), pp.317 - 334. ⟨10.1109/TETC.2015.2405478⟩ |
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A Semi-Deterministic ChannelModel for VANETs SimulationsInternational Journal of Vehicular Technology, 2012, pp.1-8. ⟨10.1155/2012/492105⟩ |
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Improving monocular visual odometry localization with wheel and inertial measurementsSeventeenth International Conference on Quality Control by Artificial Vision (QCAV2025), Jun 2025, Yamanashi Prefecture, France. pp.23, ⟨10.1117/12.3079737⟩ |
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Localisation multimodale d'un véhicule2ème Congrès Annuel de la SAGIP, May 2024, Lyon, France |
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From a classic Renault Twizy towards a low cost autonomous car prototype: a proof of conceptIFAC World Congress, Jul 2020, Berlin, Germany. pp.15161-15166, ⟨10.1016/j.ifacol.2020.12.2083⟩ |
Characterization of the impact of visual odometry drift on the control of an autonomous vehicle2020 IEEE Intelligent Vehicles Symposium (IV), Oct 2020, Las Vegas, United States. pp.2037-2043, ⟨10.1109/IV47402.2020.9304687⟩ |
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Obstacle Avoidance, Path Planning and Control for Autonomous Vehicles2019 IEEE Intelligent Vehicles Symposium, Jun 2019, Paris, France |
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Data Fusion for a Forecasting Link State Indicator in VANETsGLOBECOM 2016 - 2016 IEEE Global Communications Conference, Dec 2016, Washington, United States. pp.1-6, ⟨10.1109/GLOCOM.2016.7841717⟩ |
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Performance comparison of BER-based routing protocols under realistic conditions36th IEEE Conference on Local Computer Networks, Oct 2011, Bonn, Germany. 4 p |
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UM-CRT : Un modèle de canal semi-déterministe pour les VANETs17e Journées Nationales Micro-ondes, May 2011, Brest, France. pp.4E-14 |
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Realistic wireless communication simulations for VANETSElectronics, Computers and Artificial Intelligence - ECAI 2011 International Conference - 4th Edition, Jun 2011, Piteşti, Romania |
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UM-CRT model optimisationJournées Nationales des Communications dans les Transports Terrestres, Nov 2011, Colmar, France |
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A survey of V2V channel modeling for VANET simulationsThe 8th International Conference on Wireless On-demand Network Systems and Services - WONS 2011, Jan 2011, Bardonecchia, Italy |
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A semi-deterministic channel model for VANETs simulationsIntelligent Transport Systems Telecommunications 2010, Nov 2010, Kyoto, Japan. pp.A Semi-Deterministic Channel Model for VANETs Simulations |
Impact d'un modèle de propagation réaliste sur un protocole de routage pour les VANETsGDR ONDES et GDR ISIS, Mar 2010, Paris, France |
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An Enhanced AODV Protocol for VANETs with Realistic Radio Propagation Model ValidationITST 2009, Oct 2009, Lille, France. pp.5 |
SIMPHA Experience: Contribution to new mobility solutions for people with reduced mobility in the Upper Rhine contextSustainability research in the Upper Rhine region, 2019, 2-86820-549-6 |