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Reference Details
Wegener, Axel, Hellbrück, Horst, Wewetzer, Christian and Lübke, Andreas (2008), "VANET Simulation Environment with Feedback Loop and its Application to Traffic Light Assistance", Proceedings of the 3rd IEEE Workshop on Automotive Networking and Applications.

Traffic applications, in which vehicles are equipped with a radio interface and communicate directly with each other and the road traffic infrastructure are a promising field for ad-hoc network technology. Vehicular applications reach from entertainment to traffic information systems, including safety aspects where warning messages can inform drivers about dangerous situations in advance. As performance tests of the real system are very expensive and not comprehensive, today's evaluations are based on analysis and simulation via traffic simulators. In order to investigate the impact of traffic information systems there are two options: First, traffic simulators can be extended by application code and a simplified model for wireless communication. Second, existing network simulators can be coupled with existing traffic simulators. We favour the second approach in this work as we believe that the wireless communication characteristics influence the data transfer significantly and an oversimplified transmission model can lead to flawed results. In this paper we describe the feedback loop built by the Traffic Control Interface (TraCI) to outline its versatility. We explain its use to determine possible energy consumption reduction when traffic lights send their phase schedules to vehicles.
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