Protocols for mobile short range communication based on transponders

A difficult task in road traffic is to increase safety. A possible solution for this is direct vehicle-to-vehicle communication, with transmission of a car´s position, speed, and the driver´s intention. Microwave transponder techniques have been proposed for such a system. The authors propose medium-access control protocols well suited for use with transponder techniques. Simulation results are very encouraging and indicate that global synchronization is not absolutely necessary to achieve high-performance channel access