OPTICAL SIGNAL PROTECTION METHOD AND AN APPARATUS THEREOF ON MULTI-CASTING RING NETWORK CAPABLE OF REDUCING CAPEX(CAPITAL EXPENDITURES) AND OPEX(OPERATING EXPENSES)

摘要

PURPOSE: An optical signal protection method and an apparatus thereof are provided to implement protection of an optical signal in multicasting transmission by extraction of a desired wavelength.;CONSTITUTION: A first node device multiplexes a plurality of optical wavelength signals into an optical signal. The first node device outputs an optical signal of a multiplexed operating signal and a preliminary signal through an optical coupler(400). The adjacent second node device receives the outputted optical signal. The second node device extracts the optical signal according to a destination of the optical signal.;COPYRIGHT KIPO 2012