Patent ID: 9118412
Filing Date: 2015-08-25
Classification: G01M,H04B

Abstract:
1. A system for performing in-band reflection analysis in a passive optical network (PON), comprising: an optical line terminal (OLT) that includes a transceiver configured to transmit continuous downstream data modulated on a first wavelength and receiving upstream burst data modulated on a second wavelength, wherein the OLT further includes a receiver for receiving signals reflected from the PON that are modulated on the first wavelength, wherein the continuous downstream data comprises user data and a test data pattern; and a reflection analysis unit for cross-correlating between a time-shifted version of the transmitted test data pattern and the reflected signals, wherein the test data pattern is time-shifted relatively for an optical location to be tested, wherein the reflection analysis unit comprises a data scanner configured to identify a data pattern that should not be cross-correlated by the reflection analysis unit based on whether a density of high frequency components in the transmitted downstream data is above a predefined threshold.