Method and device for carrying out long light-emitting alarm diagnosis on ONUs (optical network units) on OLT (optical line terminal) side in EPON (Ethernet passive optical network) system

Abstract

The invention discloses a method and a device for carrying out long light-emitting alarm diagnosis on ONUs (optical network units) on the OLT (optical line terminal) side in an EPON (Ethernet passive optical network) system, which relates to the field of EPON. The method comprises the steps that after receiving a long light-emitting alarm, an OLT closes an ONU automatic discovery window, and if online ONUs exist in an ODN network, the OLT records the LLID (logical link identification) index numbers of all the online ONUs, at the moment, all the online ONUs are suspected ONUs; and the OLT broadcasts to the ONUs under the ODN (optical distribution network), sends a light module light-emitting turn-off instruction, and closes the light module light-emitting of the illegal ONUs. The method and device disclosed by the invention can carry out rapid and reliable diagnosis on long light-emitting errors of abnormal light-emitting ONUs in the EPON system, and for the controllable abnormal light-emitting ONUs, the light-emitting function of a light module is closed, or a power supply of the light module is turned off, thereby reducing the influence of the abnormal light-emitting ONUs on network services; and a positioning message is outputted to uncontrollable abnormal light-emitting ONUs, thereby facilitating the maintenance of an ODN network.

Description

Technical field [0001] The present invention relates to the field of EPON, and in particular to a method and device for ONU long light-emitting alarm diagnosis on the OLT side in an EPON system. Background technique [0002] EPON (Ethernet Passive Optical Network, Ethernet Passive Optical Network) is a single-fiber bidirectional optical access network with a P2MP (Point 2 Multiple Point, point-to-multipoint master) structure, and its typical topology is a tree. [0003] See figure 1 As shown, the EPON system consists of an OLT (Optical Line Tterminal) on the office side, an ONU (Optical Network Unit) and an ODN (Optical Distribution Network) on the user side, a single-fiber bidirectional system . In the downstream direction from the OLT to the ONU, the signal sent by the OLT reaches each ONU through the ODN; in the upstream direction from the ONU to the OLT, the signal sent by the ONU will only reach the OLT and not other ONUs. In order to avoid data conflicts and improve network...

AI Technical Summary

Problems solved by technology

[0006] (1) Illegal light source access: mistakenly connect some illegal long-emitting light sources to the branch fiber to attack the network, causing the optical module of the ONU to emit light continuously. The long-emitting ONU caused by this illegal access is defined as Uncontrolled abnormal light ONU, for the uncontrolled abnormal light ONU, the OLT cannot turn off the light source through the remote control command

[0007] (2) The software of the ONU device crashes or is abnormal, causing the optical module of the ONU to emit light for a long time. At this time, the software of the ONU is abnormal and cannot accept any instructions from the OLT. This long-emitting ONU is defined as an uncontrolled abnormal light-emitting ONU

[0012] (1) The existing abnormal light emission diagnosis and processing method can only identify the suspected ONU with abnormal light emission, but cannot identify whether the current state of the suspected ONU is controllable, and cannot accurately report the fault controllable state of the suspected ONU to the operation management and maintenance software interface. Equipment maintenance inconvenient

[0013] (2) Existing diagnosis and treatment methods for abnormal light only turn off the light-emitting function of the optical module to diagnose the problem, which will cause some ONUs with abnormal light to not be effectively processed

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