Wdm-tdm hybride optical network and self defection method of optical channel problem thereof

The invention of the time-division-multiplexed passive optical network (TDM-PON, time division multiplexing-passive optical network) the wavelength division multiplexing (WDM, wavelength division multiplexing) techniques and OLT and WDM-TDM conversion device in the WDM-TDM hybrid optical network that combines It relates to channel impairments between the respective WDM optical transceivers (TRx) to a technique for mutual self-diagnosis. The WDM-TDM hybrid optical network of the present invention is such, OLT (optical line terminal) containing the M number of 1WDM optical transceiver for generating a WDM downstream optical signal; And a 2WDM the optical transceiver and the downstream electric signal and comprises a WDM-TDM conversion device including a TDM optical transceivers for converting a downlink TDM optical signal, generates a random pattern for converting the down-WDM optical signal to the downstream electric signal and, this, by using a first optical transceiver 2WDM TDM-WDM converter control unit for 1WDM transmitted to the optical transceiver of the OLT; And wherein the 1WDM when the pattern is normal by monitoring the said pattern transmitted through the optical transceiver includes an OLT control unit sending it back to the 2WDM optical transceiver, the WDM-TDM conversion device control unit is the first 1WDM optical transceiver the method of claim 2WDM returned to the optical transceiver is abnormal by the pattern to this, the receiving device or a characteristic that determines a failure of the transmission system of the optical transceiver of the 1WDM 2WDM optical transceiver. Complex, Passive Optical Network, PON, WDM, TDM, hybrid