Patent ID: 6104308
Filing Date: 2000-08-15
Classification: B60R

Abstract:
A system for communication between a central unit and a plurality of remote units, said system comprising:an electrical conductor interconnecting the central unit and the remote units for conducting electrical energy;voltage modulation means, associated with the central unit, for modulating voltage of the electrical energy to send data from the central unit to the remote units over said conductor;a plurality of current modulation means for modulating current of the electrical energy, each of said current modulation means being associated with one of the remote units and modulating current to send data from the associated remote unit to the central unit over said conductor, the sending of data from the remote units to the central unit occurring simultaneously with the sending of data from the central unit to the remote units; anda plurality of control means for controlling said plurality of current modulation means, each of said control means being associated with one of said current modulation means and controlling said associated current modulation means to send the data from the associated remote unit to the central unit during sending of data from the central unit to a remote unit other than the associated remote unit.