Patent ID: 7272311

Claim:
An optical ring network for burst data communication, the optical ring network comprising: a plurality of core nodes connected with each other through fiber links, wherein each core node comprising a demultiplexer, to demultiplex a received optical signal into a plurality of channels; an add/drop section, to drop selected channels from the plurality of channels; a multiplexer, to multiplex and output the plurality of channels received from the add/drop section; a branching section to branch off channel portions from respective channels of the a plurality of channels from the demultiplexer; a controller, to recognize destinations of frames modulated on each channel using the branched channel portions, and output the control signal for dropping the selected channels to the add/drop section; and a plurality of ingress nodes provided for each core node, the ingress node comprising: an interface section, connected to a plurality of service devices, to recognize destinations of packet data received from the service devices; a burst assembler, having a plurality of buffers subdivided according to destinations, to bind packet data stored on each buffer at a predetermined length to create a burst datum; a first electric switch to output packet data received from the interface section to the corresponding buffers of the burst assembler, according to a destination; a header attaching section to bind the received burst datum and the header datum indicating the destination to create a frame; a second electric switch to output burst data stored on the corresponding buffers of the burst assembler based on the control signal of the controller; and an optical transmitting section to permit channels modulated by frames received from the header attaching section to be outputted to the add/drop section of each core node.