Power-line communication method, power-line communication device, and power-line communication system
First Claim
1. A power-line communication method of performing multi-carrier communication with a communication device using a power line as a communication medium, the power-line communication method comprising:
- detecting a noise condition in the communication medium in correspondence to a period synchronized with a power source cycle of the power line;
generating a plurality of communication channels in a time domain in accordance with a comparison result of the noise condition with a predetermined value on the basis of the noise condition detected in the noise detection process;
preparing tone maps corresponding to the plurality of communication channels generated in the communication channel decision process; and
transmitting and receiving data on the basis of the tone maps prepared in the tone map preparation process,wherein the communication channel decision process and the tone map preparation process are performed again after the communication process is performed.
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Accused Products
Abstract
To provide a power-line communication method, a power-line communication device, and a power-line communication system, which can make communication with high communication efficiency even when the condition of a power line is changed. In step S101, a noise detection process is performed in correspondence to a time domain synchronized with a power source cycle of a power line. In step S102, a communication channel decision process of generating communication channels in the time domain is performed on the basis of the noise condition detected in step S101. In step S103, tone maps are prepared for the communication channels generated in step S102. When the preparation of the tone maps is ended, the tone maps are transmitted to a destination PLC and data are transmitted and received between a transmission-side PLC and a reception-side PLC by the use of the same tone map (step S104).
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Citations
22 Claims
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1. A power-line communication method of performing multi-carrier communication with a communication device using a power line as a communication medium, the power-line communication method comprising:
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detecting a noise condition in the communication medium in correspondence to a period synchronized with a power source cycle of the power line; generating a plurality of communication channels in a time domain in accordance with a comparison result of the noise condition with a predetermined value on the basis of the noise condition detected in the noise detection process; preparing tone maps corresponding to the plurality of communication channels generated in the communication channel decision process; and transmitting and receiving data on the basis of the tone maps prepared in the tone map preparation process, wherein the communication channel decision process and the tone map preparation process are performed again after the communication process is performed. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A power-line communication method of performing multi-carrier communication with a communication device using a power line as a communication medium, the power-line communication method comprising:
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detecting a noise condition in the communication medium in correspondence to a period synchronized with a power source cycle of the power line; generating a plurality of communication channels in a time domain in accordance with a comparison result of the noise condition with a predetermined value on the basis of the noise condition detected in the noise detection process; preparing tone maps corresponding to the plurality of communication channels generated in the communication channel decision process; transmitting and receiving data on the basis of the tone maps prepared in the tone map preparation process; and receiving a measurement result of the communication medium from the communication device and detecting a variation in state of the communication medium, during communication with the communication device in the communication process, wherein when it is detected in the communication medium condition variation detection process that the condition in the communication medium varies more than a predetermined amount, the communication channel decision process and the tone map preparation process are performed again.
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9. A power-line communication device for performing multi-carrier communication using a power line as a communication medium, the power-line communication device comprising:
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a reception section which receives a noise condition in the communication medium sent from a reception-side power-line communication device through the power line; a transmission section which transmits a signal through the power line; and a control section which detects the noise condition in the communication medium received by the reception section in correspondence to a time domain synchronized with a power source period of the power line, generates a plurality of communication channels in the time domain on the basis of the noise condition in the communication medium, and controls the transmission section to transmit data using tone maps corresponding to the plurality of communication channels, wherein the transmission section transmits a packet for detecting the noise condition in the communication medium; wherein the reception section receives the noise condition in the communication medium transmitted from a different power-line communication device which receives the packet, and wherein the control section generates the communication channels on the basis of a condition of noise. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A power-line communication device for performing multi-carrier communication using a power line as a communication medium, the power-line communication device comprising:
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a reception section which receives a signal from the power line; a transmission section which transmits a noise condition in the communication medium to a transmission-side power-line communication device through the power line; and a control section which detects the noise condition in the communication medium in correspondence to a time domain synchronized with a power source cycle of the power line on the basis of the signal received by the reception section, prepares tone maps corresponding to each of a plurality of communication channels in the time domain generated by the transmission-side power-line communication device on the basis of the noise condition, and controls the reception section to receive data using the prepared tone maps, wherein the control section detects the noise condition on the basis of a reception state of a noise detection packet received in the reception section from a different power-line communication device. - View Dependent Claims (18, 19, 20, 21)
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22. A power-line communication system for performing multi-carrier communication using a power line as a communication medium, the power-line communication system comprising:
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a first power-line communication device including; a reception section which receives a noise condition in the communication medium sent from a reception-side power-line communication device through the power line; a transmission section which transmits a signal through the power line; and a control section which detects the noise condition in the communication medium received by the reception section in correspondence to a time domain synchronized with a power source cycle of the power line, generates a plurality of communication channels in the time domain on the basis of the noise condition in the communication medium, and controls the transmission section to transmit data using tone maps corresponding to the plurality of communication channels; and a second power-line communication device including; a reception section which receives a signal from the power line; a transmission section which transmits a noise condition in the communication medium to a transmission-side power-line communication device through the power line; and a control section which detects the noise condition in the communication medium in correspondence to a time domain synchronized with a power source cycle of the power line on the basis of the signal received by the reception section, prepares tone maps corresponding to each of a plurality of communication channels in the time domain generated by the transmission-side power-line communication device on the basis of the noise condition, and controls the reception section to receive data using the prepared tone maps.
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Specification