Data processing: measuring – calibrating – or testing – Measurement system – Measured signal processing
Reexamination Certificate
2006-05-23
2006-05-23
Bui, Bryan (Department: 2863)
Data processing: measuring, calibrating, or testing
Measurement system
Measured signal processing
C380S255000
Reexamination Certificate
active
07050947
ABSTRACT:
A remote communication system (20) includes a signaling device (24) and a remotely located controller (26). The signaling device (24) includes a synchronization counter (44) and the controller includes a synchronization counter (34). Under normal circumstances, a transmitter (42) sends signals that are received by a receiver (32) and then processed appropriately by the controller (26). Transmissions from the transmitter (42) to the receiver (32) preferably are encrypted and then deciphered based upon a value from the synchronization counters. When the synchronization counter values do not correspond sufficiently to allow effective communication, synchronization counter value information is shared using a bi-directional communication link (50, 52) so that there may be correspondence between the synchronization counter values. In one example, low frequency (LF) signals are used for transmitting the synchronization counter values across the bi-directional communication link.
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Bui Bryan
Pretlow Demetrius
Siemens VDO Automotive Corporation
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