Coupling between power line and customer in power line communication system
First Claim
1. A power line communication system in which a first power line is coupled to a second power line by a transformer and modulated radio frequency communication signals are supplied to the first power line, both the first and the second power line transmitting alternating current at a frequency which is low relative to the frequency of the radio frequency signals, the system comprising:
- conductive wiring at the premises of a customer coupled to the second power line for conveying electrical power;
processing apparatus at the premises coupled to the wiring for processing the communication signals and for supplying modulated communication signals;
coupling apparatus coupled to the first power line and to the wiring for supplying communication signals from the first power line to the processing apparatus and to the first power line from the processing apparatus, the coupling apparatus comprising;
a coupler including a first transceiver for receiving the communication signals from the first power line and transmitting electromagnetic energy modulated with the modulation of the communication signals and for receiving other electromagnetic energy modulated with the modulation of other modulated communication signals and transmitting modulated communication signals to the first power line;
a base unit spaced from the coupler including a second transceiver for receiving the modulated electromagnetic energy transmitted by the first transceiver and coupled to the wiring for transmitting to the wiring communication signals modulated with the modulation of the electromagnetic energy received from the first transceiver and coupled to the wiring for receiving modulated communication signals from the processing apparatus and transmitting to the first transceiver the other electromagnetic energy; and
an induction coil inductively coupled to the first power line and coupled to the first transceiver for supplying communication signals from the first transceiver to the first power line and receiving communication signals from the first power line and supplying the received communication signals to the first transceiver.
6 Assignments
0 Petitions
Accused Products
Abstract
Apparatus for coupling communication signal modulated radio frequency signals between an electrical power distribution line and the electrical power wiring at a customer'"'"'s premises which includes a first transceiver for transmitting and receiving electromagnetic energy is inductively coupled to the distribution line and a second transceiver for receiving electromagnetic energy from, and transmitting electromagnetic energy to, the first transceiver. The second transceiver is coupled to the customer'"'"'s power wiring to receive communication signals from, and to supply communication signals to, the customer'"'"'s power wiring. The electrical power for the first transceiver can be supplied by inductive coupling to the power line and/or a battery, the battery being a back-up source when both inductive coupling and a battery are present.
23 Citations
9 Claims
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1. A power line communication system in which a first power line is coupled to a second power line by a transformer and modulated radio frequency communication signals are supplied to the first power line, both the first and the second power line transmitting alternating current at a frequency which is low relative to the frequency of the radio frequency signals, the system comprising:
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conductive wiring at the premises of a customer coupled to the second power line for conveying electrical power; processing apparatus at the premises coupled to the wiring for processing the communication signals and for supplying modulated communication signals; coupling apparatus coupled to the first power line and to the wiring for supplying communication signals from the first power line to the processing apparatus and to the first power line from the processing apparatus, the coupling apparatus comprising; a coupler including a first transceiver for receiving the communication signals from the first power line and transmitting electromagnetic energy modulated with the modulation of the communication signals and for receiving other electromagnetic energy modulated with the modulation of other modulated communication signals and transmitting modulated communication signals to the first power line; a base unit spaced from the coupler including a second transceiver for receiving the modulated electromagnetic energy transmitted by the first transceiver and coupled to the wiring for transmitting to the wiring communication signals modulated with the modulation of the electromagnetic energy received from the first transceiver and coupled to the wiring for receiving modulated communication signals from the processing apparatus and transmitting to the first transceiver the other electromagnetic energy; and an induction coil inductively coupled to the first power line and coupled to the first transceiver for supplying communication signals from the first transceiver to the first power line and receiving communication signals from the first power line and supplying the received communication signals to the first transceiver. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification