Power line communication system
First Claim
Patent Images
1. Communication apparatus, comprising:
- a network of power lines; and
first, second and third transceivers, coupled to the network, the first transceiver being adapted to transmit a first signal over the network to the second transceiver within a selected frequency band at a transmission power level sufficiently strong that the first signal can be decoded by the second transceiver, but is attenuated sufficiently when it reaches the third transceiver so that the third transceiver can receive a second signal over the network in the selected frequency band substantially without interference by the first signal.
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Abstract
Communication apparatus, comprising: a network of power lines; and first, second and third transceivers, coupled to the network, the first transceiver being adapted to transmit a first signal over the network to the second transceiver within a selected frequency band at a transmission power level sufficiently strong that the first signal can be decoded by the second transceiver, but is attenuated sufficiently when it reaches the third transceiver so that the third transceiver can receive a second signal over the network in the selected frequency band substantially without interference by the first signal.
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Citations
35 Claims
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1. Communication apparatus, comprising:
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a network of power lines; and first, second and third transceivers, coupled to the network, the first transceiver being adapted to transmit a first signal over the network to the second transceiver within a selected frequency band at a transmission power level sufficiently strong that the first signal can be decoded by the second transceiver, but is attenuated sufficiently when it reaches the third transceiver so that the third transceiver can receive a second signal over the network in the selected frequency band substantially without interference by the first signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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30. A method for communication over a network of power lines, comprising:
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establishing an initial communication link within a selected frequency band over the network between a first transceiver coupled to the network and a second transceiver coupled to the network; transmitting a signal over the initial communication link from the first transceiver to the second transceiver at a first power level sufficiently strong that the signal can be decoded by the second transceiver, but is attenuated sufficiently when it reaches a third transceiver coupled to the network so that the third transceiver is unable to decode the signal; terminating the initial communication link; establishing a re-transmission communication link between the second transceiver and the third transceiver; and transmitting the signal from the second transceiver to the third transceiver over the re-transmission communication link at a second power level so that the signal can be decoded by the third transceiver.
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31. A method for communication over a network of power lines, comprising:
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establishing a communication link within a selected frequency band over the network of power lines between a first transceiver coupled to the network and a second transceiver coupled to the network; transmitting a first signal over the link from the first transceiver to the second transceiver; terminating the communication link; establishing a re-transmission communication link between the second transceiver and a third transceiver coupled to the network; and
transmitting the first signal from the second transceiver to the third transceiver. - View Dependent Claims (32, 33, 34, 35)
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Specification