Method and system for OLT (optical line terminal) loopback detection in GPON (Gigabit-Capable PON) system

Abstract

The invention relates to the technical field of optical communication, and discloses a method for OLT (optical line terminal) loopback detection in a GPON (Gigabit-Capable PON) system. The method comprises the following steps: S1, initializing a receiving and packaging processing task of a CPU of OLT equipment, performing message receiving, recognizing whether a received message is a two-layer study mac address drifting message, going to S2 if yes, and finishing if not; S2, initializing a two-layer study processing task of the OLT equipment, and copying the message to the CPU of the OLT equipment under the situation of enabling the two-layer study mac (Media Access Control) address drifting detection loopback; S3, performing polling whether the two-layer study mac address drifting message is received, going to S4 if yes and repeating S3 if not; S4, performing alarm processing. The invention further discloses a system for OLT loopback detection in the GPON system. The method and the system disclosed by the invention can be used for effectively detecting loopback in the GPON system.

Description

technical field [0001] The invention relates to the technical field of optical communication, in particular to a method for OLT loopback detection in a GPON system and a system for OLT loopback detection in the GPON system. Background technique [0002] GPON (Gigabit-Capable PON, Passive Optical Access System) technology is the latest generation broadband passive optical integrated access standard based on the ITU-TG.984.x standard, with high bandwidth, high efficiency, large coverage and rich user interfaces And many other advantages, it is considered by most operators as an ideal technology to achieve broadband and comprehensive transformation of access network services. In the data encapsulation of GPON, the ONU (Optical Network Unit, optical network unit) receives the upstream data from the UNI (User Network Interface, user network interface), and the ONU encapsulates the upstream data into a GEM frame and sends it to the OLT (opticalline terminal, the optical line term...

AI Technical Summary

Problems solved by technology

[0003] Normally, the OLT line chuck in the GPON system supports 16 PON (Passive Optical Network, Passive Optical Network) ports, and each PON port has a split ratio of 128. If there is a data or protocol message ring in the link due to some reasons Forwarding will cause a data storm in the network and affect the normal business operation. Therefore, it is extremely important to implement loopback detection in the GPON system

[0004] In the prior art, the ring network detection protocol is generally used for loopback detection in the GPON system. The ring network detection protocol has the advantages of not being based on network topology calculation, active loop discovery and ring breaking. The ring network detection protocol passes through a certain port The port information carried in the received detection message is used to determine whether the port forms a loop. The detection message usually uses a special vlan (Virtual Local Area Network, Virtual Local Area Network) and Ethernet type, and carries the port information sent to the port. The detection method through the detection message can meet the application requirements of the GPON system, but this detection method requires both the OLT and the ONU to support the identification, tracking, detection and ring breaking of the detection message, and there are detection limitations.

Images