AWG BASED WDM-PON ARCHITECTURE FOR THE PROTECTION OF MULTIPLE POINT FAILURES

摘要

The present invention is terminated with a light device (Optical Line Terminal, hereinafter 'OLT' hereinafter) and a plurality of optical network termination devices (Optical Network Unit, hereinafter 'ONU' hereinafter) Wavelength Division Multiplexing Access Network passive optical consisting of ( Wavelength Division Multiplexed relates to Passive Optcial Network, less efficient technology dual structure to ensure the viability of the networks when 'WDM-PON' quot;) single or multiple failures stand in the small intestine and configure the network from. In a wavelength division multiplexed passive optical network provided by the present invention 1 in the OLT area again in a structure designed as a full-duplex structure: placing a second optical switch, a remote node of the two passive wavelength routing devices located on (Remote Node RN) AWG ( a structure that provides a connection with the Arrayed Waveguide Grating) is a recovery possible for one or a plurality of failures. In addition, the recovery algorithm that provides provides an alternate recovery function according to the failure location and device failure occurred.