1. RUBeNS: Rural&UrBan e-Travelling Network Simulator  Commercial microscopic, time step and behavior based simulation model developed to model urban traffic and public transit operations (Wiedemann Approach)  Models different driving modes (free driving, approaching, following), braking, lane changes  Provides good documentation of COM interface and has support We decided to implement our own interconnection of a road traffic simulator and a telecommunications simulator (NS-2)  Road safety information  Warning messages (sloppy road)  Pile-up avoidance  Cooperative driving  to ease, secure the crossing of road intersections  Adaptive Cruise Control – ACC  Platooning  a string of cars closely following each other  their speed should be synchronized (tempomat)  Road Traffic Information  Traffic jams, Travel times, Traffic control RUBeNS Rural & UrBan e-Travelling Network Simulator  BMW Research and Technology (2005) CARISMA – NS-2 Traffic jam warning messages  Michigan State University (2005) OwnSim – NS-2 3 car pile-up avoidance scenario  Volkswagen AG (2005) VISSIM – NS-2 Emergency warning messages Sándor Kardos, Péter Laborczi, Attila Török, Lóránt Vajda Bay Zoltán Foundation for Applied Research, H-1116 Budapest, Fehérvári út 130., Hungary E-mail: {kardos, laborczi, torok, vajda}@ikti.hu Problem Formulation State of the Art Vehicular ad hoc networks Road Traffic Simulators examined Controls VISSIM. Translates commands and parameters received from the TCP/IP Socket module and translates to VISSIM and vice versa: Start, Stop, RunTill, GetVehicleAttribute, SetVehicleAttribute, GetAllVehicleAttribute Tools: Visual C++, VISSIM COM interface  Inter-vehicular wireless ad hoc networks will be wide spread in the future  Today appropriate tools are required for protocol design and analysis Our work  Implementation of a generic simulation environment  Multi-purpose (protocol design & validation)  Used components:  NS-2 (Linux)  VISSIM (Windows) Applications  Open source traffic simulator with a wide range of traffic management system designs; models the response of drivers to real-time traffic information and controls  Managed to compile from the source under linux (old gcc 2.96 only)  Only user documentation, no support  GPL mobility simulator with microscopic car movement model, space-continuous and time-discrete car-following model  Managed to compile version 0.9.2 from the source under Linux  Sparse documentation  primitive motion and road modelling PHY+MAC Module Apply an 802.11b protocol module under NS-2. The module is able to modify/query the node positions. Creates commands for VISSIM according to the defined command set and sends to the TCP/IP Socket Module; the module also translates the response for NS-2. Application & Communication Protocol Module Implementation of the control application and a simple flooding protocol for the demo application. A simple flooding protocol transmits this information to other affected cars, which react on this information. Future work Exact Definition of applications / scenarios  More advanced group communication  Challenges:  Multi-hop communication  Reducing network traffic  Digital Map Handling MITSSIMLab They all either use too simple modelling or are proprietary SUMO (Simulation of Urban MObility) VISSIM Simulation Components Simulator Architecture Text-based comminucation protocol based on Boost and DataReel libraries We have defined generic interfaces in cooperation with German collegaues for simulator interconnection and C++ in order to achieve relatively easy adaptation to other possible simulators.