Communications: electrical – Continuously variable indicating – With meter reading
Patent
1995-06-30
1998-03-10
Horabik, Michael
Communications: electrical
Continuously variable indicating
With meter reading
34082506, 315294, H04Q 700
Patent
active
057266441
ABSTRACT:
Building lights are master controlled to reduce power consumption under building master control, or in response to electric utility commands to the building computer. Each lighting wall control unit includes a transceiver which can communicate to at least one neighbor transceiver, thereby forming a distributed communication network extending back to the building computer. The transceivers operate asynchronously with low data rate FSK signals, using carrier frequencies between 900 and 950 MHz. Different communications protocols control packet forwarding and acknowledgement so that messages reach their destination but are not forwarded in endless circles, and so that collisions are minimized.
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Jednacz Thomas E.
Satyanarayana Srinagesh
Xia Yongping
Barschall Anne E.
Horabik Michael
Merz Edward
Philips Electronics North America Corporation
Treacy David R.
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