Power line network system and method
First Claim
1. A circuit for use in a power-line communication system in which power distribution lines are used by a power plant to distribute power and communication information, using alternating current signals between power distribution stations and endpoint devices, the circuit comprising:
- a signal driving circuit configured and arranged to couple data-carrying symbols over the power distribution lines, via a waveform, that carries an alternating current signal having a frequency and/or phase that varies, relative to a frequency and/or phase of previous cycles of the alternating current signal, the data-carrying symbols corresponding to respective information signals;
a signal-monitoring circuit configured and arranged for monitoring variations in the alternating current signal;
an encoding circuit configured and arranged to provide encoded parameters that define, at least in part, data for accounting for the variations; and
circuitry configured and arranged to respond to the encoding circuit by providing information to the signal driving circuit, based on the data for accounting for the variations, that causes the signal driving circuit to modulate the alternating current signal of the power distribution line with the data-carrying symbols, wherein the encoding circuit and the circuitry are configured and arranged to adjust, in response to the signal-monitoring circuit, the modulation of the alternating current signal to account for the variations.
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Accused Products
Abstract
Various aspects of the instant disclosure are directed towards communicating symbols over a power line carrying alternating current, based upon frequency variations in the alternating current. In accordance with some embodiments, a line driver couples data-carrying symbols over the power line, via a waveform. Variations in the alternating current are monitored and used for defining data useful for providing steps of the waveform. The accessed data entries are used to drive a line driver for modulating alternating current on the power line to account for the variations.
40 Citations
20 Claims
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1. A circuit for use in a power-line communication system in which power distribution lines are used by a power plant to distribute power and communication information, using alternating current signals between power distribution stations and endpoint devices, the circuit comprising:
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a signal driving circuit configured and arranged to couple data-carrying symbols over the power distribution lines, via a waveform, that carries an alternating current signal having a frequency and/or phase that varies, relative to a frequency and/or phase of previous cycles of the alternating current signal, the data-carrying symbols corresponding to respective information signals; a signal-monitoring circuit configured and arranged for monitoring variations in the alternating current signal; an encoding circuit configured and arranged to provide encoded parameters that define, at least in part, data for accounting for the variations; and circuitry configured and arranged to respond to the encoding circuit by providing information to the signal driving circuit, based on the data for accounting for the variations, that causes the signal driving circuit to modulate the alternating current signal of the power distribution line with the data-carrying symbols, wherein the encoding circuit and the circuitry are configured and arranged to adjust, in response to the signal-monitoring circuit, the modulation of the alternating current signal to account for the variations. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 18, 19, 20)
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14. A circuit for use in a power-line communication system in which power distribution lines are used by a power plant to distribute power and communication information, using alternating current signals between power distribution stations and endpoint devices, the circuit comprising:
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a signal driving circuit configured and arranged to couple data-carrying symbols over the power distribution lines, via a waveform, that carries an alternating current signal having a frequency and/or phase that varies, relative to a frequency and/or phase of previous cycles of the alternating current signal, the data-carrying symbols corresponding to respective information signals; a signal-monitoring circuit configured and arranged for monitoring variations in the alternating current signal; an encoding circuit configured and arranged to provide encoded parameters that define, at least in part, data for accounting for the variations; and circuitry configured and arranged to respond to the encoding circuit by providing information to the signal driving circuit based on stored pre-calculated values that are accessed by the circuitry based on the data for accounting for the variations, wherein the stored pre-calculated values are used by the circuitry to cause the signal driving circuit to modulate the alternating current signal of the power distribution line with the data-carrying symbols. - View Dependent Claims (15, 16, 17)
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Specification