Communications: electrical – Continuously variable indicating – With meter reading
Patent
1996-12-20
1999-03-23
Zimmerman, Brian
Communications: electrical
Continuously variable indicating
With meter reading
379103, 34082572, H04Q 100
Patent
active
058866477
ABSTRACT:
A transceiver is used to receive remotely-broadcast, radio frequency (rf) signals at a first frequency. The remotely-broadcast rf signals contain encoded, partial control commands as message packets. Each transceiver is adapted to respond only to signals addressed to it. Upon receipt of an intended rf signal, the transceiver decodes and authenticates the signal. If authenticity is established and the decoded signal is recognized as a proper control signal, a new control message packet is generated using information contained in the incoming message packet and information stored in the memory of the internal micro-controller. The new message packet is broadcast using by a low-power rf transmitter tuned to a different frequency that the frequency of the incoming rf signal. A random delay may be introduced between the receipt of the incoming message and the broadcast of the outgoing message to minimize the probability of correlating the output signal with the input signal. Each controlled device within range of the low-power transmitter then receives the new signal, decodes its contents, and responds appropriately to signals intended for the individual device.
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Badger Berkley C.
Jones David E.
Siemens Terrance L.
Zimmerman Brian
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