Synergetic networking system based on power line communication and communication method

The present application provides a network power line communication system and a communication method based cooperative, the system comprising: a power line network, transmitting and receiving devices, wherein the transmission means comprises at least two PLC modems connected by a power line link. When the power line channel is not optimal channel between the PLC modem and the receiving apparatus transmitting apparatus transmitting a signal, PLC modem transmitted signal via a wireless link power line channel between a signal transmitted to the receiving device than itself and the reception another PLC modem channel between the apparatus, the PLC modem signal to the receiving device through the power line communication. The system and method of the present application provides the means to ensure a reliable information transmission the respective PLC modems, effective transmission, improve the reliability and effectiveness of the power line communication system.