Power line communication device transmitting at differing power levels in same communication

摘要

A power-line communications (PLC) device communicates with a second PLC device via a PLC medium and includes a transmitter and a receiver. The transmitter transmits a Request to Send (RTS) communication to the second PLC device at a first power level. The receiver receives a Clear to Send (CTS) communication from the second PLC device. The transmitter transmits data to the second PLC device at a second power level that is less than the first power level. The transmitter transmits a TDM frame to the second PLC device that includes a preamble and header transmitted at a first power level and at least one special data symbol and a payload transmitted at a second power level that is less than the first power level. The special data symbol resides between the preamble or header and the payload and is usable by the second PLC device for processing of the payload.

主权项

1. A power-line communications (PLC) device comprising:
a PLC transceiver having a transmitter and a receiver configured to communicate, via a PLC medium, with a second PLC device and a third PLC device of a common network; and the transmitter configured to:
transmit control information to the second PLC device and to the third PLC device at a first power level;transmit first data to the second PLC device in at least one first frequency sub-band at a second power level that is less than the first power level; andtransmit second data to the third PLC device in at least one second frequency sub-band at a third power level that differs from the second power level; wherein the first power level is sufficient for the control information to be received by both the second PLC device and the third PLC device; and wherein the second power level is sufficient for the second PLC device but not the third PLC device to receive the first data.