Patent ID: 8031718

Claim:
A power line communication (PLC) data transmission method to transmit data from a PLC transmission station of a first cell to a PLC reception station of a second cell, the method comprising: receiving a group identification of the second cell and a list of station IDs of stations belonging to the second cell from a cell bridge of the second cell; storing the received group identification of the second cell and the list of the station IDs of the stations belonging to the second cell; transmitting a station ID of the PLC reception station to a cell bridge of the first cell; receiving the group identification and an encryption key of the second cell from the cell bridge of the first cell; encrypting data to be transmitted to the second cell using the encryption key of the second cell; and transmitting the station ID of the PLC reception station, the group identification of the second cell, and the encrypted data to the cell bridge of the first cell.