METHOD AND SYSTEM FOR SYNCHRONIZING UPWARD TRANSMISSION IN PASSIVE OPTICAL NETWORK

摘要

Disclosed is a method for synchronizing upward transmission in passive optical network. The method includes the following steps: An Optical Line Terminal (OLT) determines a maximum Equalization Delay EqDmax according to the maximum RTDmax among Round trip delay (RTD) of all online Optical Network Units (ONU) in Passive Optical Network (PON) system and calculates values of Equalization delay (EqD) of all ONU according to the maximum Equalization Delay EqDmax; when the RTDmax is updated, the OLT calculates EqD update information according to the updated RTDmax; the OLT sends the EqD update information to all online ONU, and the ONU updates the value of EqD according to the received EqD update information and then synchronizes upward transmission according to the updated value of EqD. The present invention also provides a system for synchronizing upward transmission in passive optical network and an OLT. The present invention improves efficiency of upward transmission.