METHOD AND SYSTEM FOR QUICKLY UPDATING RANGING RESULTS OF OPTICAL NETWORK UNIT BY OPTICAL LINE TERMINAL

摘要

The present invention discloses a method for quickly updating ranging results of an optical network unit by an optical line terminal. The method includes the following steps: the Optical Line Terminal (OLT) distributes acquired ranging difference to all the Optical Network Units (ONUs); according to the acquired ranging difference, the present ONU implements quick updating of the ranging results of the ONU itself. The present invention also discloses a system for quickly updating ranging result of the ONU by the OLT, wherein a distributing unit in the OLT is used to transmit acquired ranging difference to all the ONUs; an updating unit in the ONU is used to implement quick updating of the ranging results of the present ONU itself according to the acquired ranging difference. Application of the method and system of the present invention can save the quantity of messages, enable quick handover in protection status, thus implementing efficiently protection switching.