Patent ID: 8131153

Claim:
A power line communication (PLC) optical network unit of a hybrid fiber coaxial (HFC) communication system, the PLC optical network unit comprising: a first communication port unit connecting with a predetermined optical fiber, and receiving a predetermined optical Ethernet signal from a predetermined optical Ethernet device via the optical fiber; a second communication port unit connecting with at least one coaxial cable; a medium converter converting the received optical Ethernet signal into an Ethernet signal; a PLC converter converting the Ethernet signal into a PLC Ethernet signal corresponding to a predetermined PLC protocol; and a transmission control unit controlling the PLC Ethernet signal to be transmitted to a subscriber location via the at least one coaxial cable that connects with the second communication port unit, wherein the PLC converter comprises: a Media Access Control (MAC) address converter converting a MAC address of the Ethernet signal into a MAC address corresponding to the PLC protocol; and a physical layer converter modulating the Ethernet signal into a PLC Ethernet signal that has a physical layer corresponding to the PLC protocol, the Ethernet signal including the converted MAC address.