Method for recognizing false dying gasp of ONU (Optical Distribution Network) by OLT (Optical Line Terminal) of PON (Passive Optical Network) system

Abstract

The invention provides a method for recognizing a false dying gasp of an ONU (Optical Distribution Network) by an OLT (Optical Line Terminal) of a PON (Passive Optical Network) system. The method comprises the following steps: recognizing and filtering a dying gasp message reported by the ONU by the OLT; establishing a data table by the OLT to maintain and record a dying gasp message report state of each ONU, wherein contents in the data table are initialized when the ONU is successfully authorized; judging whether the ONU is on-line and recognizing the truth and falseness of the dying gasp message by the OLT by searching registration information of the ONU which reports the dying gasp message at an underlying MPCP (Multi Point Control Protocol) registration list; using a cycle detection mechanism to determine the false dying gasp message by the OLT; and cyclically scanning the whole ONU by the OLT in a running process, and ending the scanning process when the OLT stops running. The method for recognizing the false dying gasp of the ONU by the OLT of the PON system provided by the invention effectively avoids wrong judgment of the false dying gasp, avoids OLT equipment processing chaos, and reduces maintenance cost.

Description

technical field [0001] The invention relates to the field of passive optical network (PON), in particular to a method for PON system OLT to identify false dyinggasp of ONU. Background technique [0002] PON (PassiveOpticalNetwork Passive Optical Network) system is composed of three parts: OLT (OpticalLineTerminal Optical Line Terminal), ODN (OpticalDistributionNetwork Optical Distribution Network) and ONU (OpticalNetworkUnit Optical Network Unit). figure 1 shown. [0003] The administrator monitors the online status of the ONU through the OLT. The online state of the ONU defined on the OLT is divided into online (online), offline (offline) and power-off (poweroff) states. The online status indicates that the ONU has successfully registered on the OLT and can transmit data normally. The offline status indicates that the ONU is not online and cannot transmit data. The power-off status indicates that the ONU has changed from an online status to an offline status due to a powe...

AI Technical Summary

Problems solved by technology

ONU false dying gasp message will cause OLT to misjudge ONU online status as power-off state, occupying equipment alarm processing resources

When this problem occurs on multiple ONUs on the OLT, it will bring great difficulties to the maintenance of the equipment administrator, which is not conducive to the subsequent equipment maintenance and fault location of the administrator, and will also cause confusion in the processing of the OLT equipment software.

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