Patent ID: 9331741
Filing Date: 2016-05-03
CPC Classification: H04B

Claim Text:
1. A power line communication system, comprising: a first power line; a second power line; a power distribution device, electrically connected to the first power line and the second power line, and supplying power to the first power line and the second power line; a plurality of power line communication devices, at least comprising a transmitting device and a receiving device, wherein each of the plurality of power line communication devices is electrically connected to at least one of the first power line and the second power line; and a first coupler device, electrically connected between the first power line and the second power line, and determining, before the transmitting device transmits data to the receiving device, whether to couple the first power line to the second power line according a first signal quality between the transmitting device and the receiving device when the first coupler device doesn't couple the first power line to the second power line and a second signal quality between the transmitting device and the receiving device when the first coupler device couples the first power line to the second power line, wherein positions on the first power line and the second power line which the first coupler device is connected to are farther from the power distribution, device than that which each of the plurality of power line communication devices is connected to.