A lane-level broadcasting scheme using beam-forming for Intelligent Transportation Systems

A novel approach is proposed to enable vehicles, drivers and the traffic administrators to broadcast real-time message to desired direction with lane-level accuracy which is much more low cost and effective than traditional method or other communication systems with complex antenna array. This system can be used to lane associates management in Intelligent Transportation Systems (ITS), including temporary stop warning, on-coming traffic warning, electronic brake warning, and lane-level traffic control. The system uses a pair of symmetric transmitters which is evolved from the structure of out-phasing modulator to `select´ a special zone by beam-forming. The main advantages of the proposed method over other potential technologies such as wireless sign, smart antenna and display board are its adaptability for bad climate and compatibility to on board unite (OBU) in vehicular communication system. Key technical points of the proposed technology are analyzed by simulation, and the results of designed application scenes show the acceptable performance and confirm the viability.