Vehicular communication is an evolving technology, which aims at connecting vehicles to each other. Such a direct communication mechanism helps drivers and later autonomous vehicles to make more accurate decisions during any driving scenario or event. Therefore, solutions supporting vehicular communication in the future will help to reduce the number of accidents, moreover the traffic management could become more effective, because after an unexpected traffic situation, vehicles can be rerouted (even every single vehicle can get their own route offers for optimal city-wide solutions). So, this technology can play an important role preventing that dynamic detours also become traffic bottlenecks, thus the overall throughput can be increased in smart urban environments. In the future vehicular communication can be a key enabler for the autonomous vehicles, which nowadays mostly rely only on their own sensors. However, with direct information exchange, autonomous vehicles can become familiar with their environment in a lot more accurate fashion, so they can predict the potential hazardous situations more efficiently.
In my thesis the main goal is to present a hardware in the loop vehicular communication simulation framework that is to make development, testing and analyzation of V2X (Vehicle to Everything) applications/protocols simpler and support rapid development on real vehicular communication devices. With the developed simulation tool we can inspect the application way before real field tests start, in laboratory conditions with synthetically generated traffic. The framework enables to discover the errors/bugs in the development or in early test phases, even for the V2X applications that usually can only be tested on the field to meet the requirements. There are some existing simulation systems which provide tools for V2X application test and development (for example: Veins , VSimRTI , TraNS ), but it is not common to support real V2X devices, so the tests cannot be as realistic as in the proposed architecture. In my thesis the presented simulation tool supports the cooperation with real V2X devices, and provides real navigation data for the devices. Moreover, the SUMO (Simulation of Urban Mobility)  offers microscopic traffic simulation, so the circumstances can be more realistic and with the graphical user interface of SUMO the user can observe and evaluate the running V2X application. The simulation system provides statistical tools, which can help the V2X application developer to measure the performance of the application. The result can help the developer to compare the benefit of the vehicular communication, it can show the difference e.g., in the fuel consumption and travel time and with other key performance indicators (KPIs). In the thesis I present the usage, efficiency and the functioning of the simulation framework using several test scenarios and applications.
 C. Sommer and F. Dressler, ‘Progressing toward realistic mobility models in VANET simulations’, IEEE Communications Magazine, vol. 46, no. 11, pp. 132–137, 2008.
 ‘VSimRTI - Smart Mobility Simulation’, https://www.dcaiti.tu-berlin.de/research/simulation/. .
 ‘Traffic and Network Simulation Environment’, http://lca.epfl.ch/projects/trans/. .
 M. Behrisch, L. Bieker, J. Erdmann, and D. Krajzewicz, ‘SUMO - Simulation of Urban MObility: An overview’, in in SIMUL 2011, The Third International Conference on Advances in System Simulation, 2011, pp. 63–68.