Power line communications system combining high bitrate and low bitrate transmissions
First Claim
4. A power line communication system in which the power lines provide low voltage power to energize appliances, the system comprising:
- a control device for controlling the condition of an appliance coupled to the power lines which control device is operable by low bitrate command and control signals;
a communications device which is operable by high bitrate communication signals; and
a receiver for coupling to the power lines for receiving high frequency carriers modulated with the low bitrate and high bitrate signals;
the receiver including a demodulator for demodulating the low bitrate and high bitrate signal modulated carriers and coupled to the communications device and the control device supplying the low bitrate signals to the control device and the high bitrate signals to the communication device.
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Accused Products
Abstract
A power line communication system in which communication signals, e.g. high bitrate modulated radio frequency carriers, and electrical appliance control signals, which have a low bitrate, also modulate radio frequency carriers at frequencies of the same order as the frequencies of the high bitrate modulated carriers are applied to the power line which energizes the appliances. Transceivers are coupled to the power line, to communications devices and to appliance control devices for receiving the carriers and supplying demodulated signals to the respective devices and for supplying carriers to the power line modulated by signals received from the respective devices.
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Citations
14 Claims
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4. A power line communication system in which the power lines provide low voltage power to energize appliances, the system comprising:
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a control device for controlling the condition of an appliance coupled to the power lines which control device is operable by low bitrate command and control signals;
a communications device which is operable by high bitrate communication signals; and
a receiver for coupling to the power lines for receiving high frequency carriers modulated with the low bitrate and high bitrate signals;
the receiver including a demodulator for demodulating the low bitrate and high bitrate signal modulated carriers and coupled to the communications device and the control device supplying the low bitrate signals to the control device and the high bitrate signals to the communication device. - View Dependent Claims (1, 2, 3, 5, 6, 7)
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5-1. A power line communication system as set forth in claim 4 further comprising:
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a transmitter for coupling to the power lines for supplying high frequency carriers to the power lines;
a modulator coupled to the control device, the communications device and the transmitter for receiving low bitrate signals from the control device and high bitrate signals from the communications device and for modulating the high frequency carriers supplied to the power lines with the low bitrate signals and the high bitrate signals.
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8. A power line communication system in which the power lines provide low voltage power to energize appliances, the system comprising:
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a transmitter coupled to the power lines for supplying a plurality of high frequency carriers modulated by at least one of low bitrate signals and high bitrate signals to the power lines;
at least one of a control device and a communications device coupled to the transmitter for supplying low bitrate signals to the transmitter by the control device and high bitrate signals to the transmitter by the communications device;
a receiver coupled to the power lines for receiving the modulated high frequency carriers, the receiver having a demodulator for demodulating carriers received from the power lines which demodulator is coupled to at least one of the control device and the communications device for supplying low bitrate signals to the control device and high bitrate signals to the communications device. - View Dependent Claims (9, 10)
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11. A power line communication system in which the power lines provide low voltage power to energize appliances and in which there are communications devices operable by and supplying high bitrate communications signals and appliance control devices operable by and supplying low bitrate control signals, the system comprising:
at least one transceiver coupled to a communications device and a control device and to the power lines for supplying to the power lines high frequency carriers modulated by the low bitrate control signals and the high bitrate communications signals and for receiving from the power lines and demodulating high frequency carriers modulated with low bitrate control signals and high bitrate communications signals and supplying low bitrate control signals to the control device and high bitrate communications signals to the communications device. - View Dependent Claims (12, 13, 14)
Specification