Résumé : Trying to provide safer and more efficient transportation solutions, the need for reliable and efficient communications is increasing in ITS (Intelligent Transportation Systems) use cases such as collaborative road data collection, driver information systems, infotainment or fully driverless vehicles. Applications that rely on vehicle-infrastructure (V2I) and vehicle-vehicle (V2V) communications have different requirements and would benefit from a widely deployed common standard for the exchange of data. IP (Internet Protocol) is thus advocated as the convergence layer between the various available wireless technologies available on the market. This paper surveys the methods employed in the Imara team to provide a stable communication environment allowing driverless vehicles to interact with each other in several scenarios where information sharing is required. An account of how the solutions are integrated and how well they behave together in live experiments is given.