Patent ID: 6234428
Filing Date: 2001-05-22
Classification: B61L

Abstract:
A process for engineering a traffic communication system, the system having at least one ground-based transponder, comprising:monitoring at least one section of a line;transmitting first data on a first transmission path to at least one vehicle having a sending and receiving unit, when the at least one section of a line is traveled over by the at least one vehicle;transmitting individually modulated multiplexed signals from a base station on a second transmission path to the at least one vehicle, the signals being formed by at least one of the code division multiplexing, time division multiplexing and frequency division multiplexing processes;forming coefficients in accordance with the type of said multiplexing process provided for the second transmission path;storing the coefficients in the transponder in one of fixed and variable format;transmitting the coefficients via the first transmission path;extracting the coefficients in a designated vehicle of the at least one vehicle;using the coefficients for one of demodulation and demultiplexing signals transmitted on the second transmission path; anddetermining whether the signals transmitted on the second transmission path are designated for the designated vehicle and should be processed further.