METHOD AND APPARATUS FOR OPTICAL SIGNAL CONTROL USING FILTER IN MULTICASTING RING NETWORK NODE AND PROTECTION SWITCHING IN OPTICAL MULTIPLEX SECTION

摘要

A method and apparatus for optical signal control using a filter in a multicasting ring network node and protection switching in an optical multiplex section is disclosed, in which a multicasting ring network node extracts or passes a wavelength from a node requiring optical signal wavelength extraction, transmits the passed optical signal to a neighboring node through control as necessary, and readily performs protection switching on an optical multiplex section signal.