US Patent 7945381 Method for vehicle communication

A method is disclosed for communication between a vehicle travelling along a route and a stationary system. The vehicle is equipped with a communication unit to communicate messages to the stationary system. The method includes dividing the route into a plurality of partial sections, defining for each partial section a required information flow from the vehicle, and adapting the communication to this definition. The method makes it possible to command the communication unit to communicate with correctly adjusted accuracy. This also improves the possibility of effectively utilizing the traffic information in local units, for instance for displays and traffic signals.