Car communication system with numerous aerial units

摘要

A road mounted assembly for the numerous aerial units (16-18) with adjacent communication sections adjusts overlapping time points for transmission of pilot or interrogation signals, actuating the respect aerial unit in agreement with the different time points, identifying a car, passing through one communication region, based on main position of a received signal. In the car (29) is located a device (30), transmitting a pilot reaction signal on pilot signal reception, and a interrogation reaction signal on the interrogation signal reaction reception from the same aerial unit for the communication process. The car mounted device operates on pilot signal reception by the aerial unit.