Patent ID: 7388888
Filing Date: 2008-06-17
Classification: H04L,H04Q

Abstract:
1. A method for transmitting and receiving Ethernet data in a broadcast/communication convergence system, the system being equipped with an optical network unit for carrying out a time division multiplexing operation for the Ethernet data switched by a network switch and a plurality of broadcast data units, transmitting a result of the time division multiplexing operation to a corresponding subscriber set-top box, and providing data from the subscriber set-top box to the network switch, the method comprising the steps of: (a) producing a length of an Ethernet data frame provided from the network switch at the optical network unit; (b) removing the a preamble bit and a Start-of-field Delimiter (SFD) from the Ethernet data frame, and performing an encapsulation operation, wherein a data length information is determined and inserted into the Ethernet data frame; (c) transmitting the encapsulated Ethernet data frame to the subscriber set-top box; (d) performing a time division demultiplexing operation at the subscriber set-top box for a Ethernet data frame transmitted from the optical network unit and separate the Ethernet data frame into the Ethernet data and broadcast data; (e) detecting a framing bit from the frame of the Ethernet data based on a result of the separation, detecting the length information from the Ethernet data frame; (f) counting the Ethernet data frame on the basis of the detected length information and recognizing the Ethernet data; and (g) inserting a preamble bit and a start-of-field (SFD) into the recognized Ethernet data and recovering and processing original Ethernet data.