Patent ID: 7450581
Filing Date: 2008-11-11
Classification: H04J,H04Q

Abstract:
1. An Ethernet passive optical network (EPON) for convergence of broadcasting and communication, the Ethernet passive optical network comprising: an optical line terminal (OLT) for switching digital broadcasting and/or digital image data according to broadcasting and/or image selection information from each of multiple optical network terminals (ONTs), modulating the switched data into frequencies assigned to each ONT of the multiple ONTs, coupling with a communication signal a signal formed from combining the modulated data, and transmitting the coupled signal, the digital broadcasting and/or digital image data being transmitted from an outside broadcaster, the communication signal being obtained by optically modulating communication data from IP network; said multiple ONTs, said ONTs being configured for receiving an optical signal from the OLT, dividing the optical signal into the combined signal and the communication signal, convening the divided signals into electrical signals, demodulating the converted combined signal into assigned frequencies, outputting the demodulated information and the converted communication signal to a user, receiving from the user communication data and the broadcasting and/or image selection information, and outputting the communication data and broadcasting and/or image selection information to the OLT; and a divider for dividing the signal from the OLT among the multiple ONTs, joining signals from the multiple ONTs, and transmitting the joined signal to the OLT; wherein frequency components are assigned to each ONT with specific broadcasting and/or image transmission frequencies according to ONTs, so as to prevent broadcasting and/or image signals selected by each ONT from colliding with each other on an optical line.