Hand-in-hand protection switching method and system in EPON (Ethernet Passive Optical Network)

Abstract

The invention relates to a hand-in-hand protection switching method and system in an EPON (Ethernet Passive Optical Network). At a user side, a single PON MAC (media access control entity) is combined with a double-optical module ONU (optical network unit), a hand-in-hand protection group is established on each OLT (optical line terminal) at each of two ends, and (1+1) whole protection is realized, after the protection groups are successively established, a user sends configuration data of the ONU to any one of OLTs through an NMS (network management system), two PON ports of the ONU are respectively connected to corresponding PON ports of the OLTs at two ends, and when a fault exists, the ONU completes fault detection, switches to the PON port at the other side to continuously work from the currently working PON port, is free of registration in the switching process, and reports the switching event after the switching is completed. The method and system provdied by the invention adopts the ONU of a PON MAC type, and combines the functions of configuration management, switching control, data synchronization and state maintenance of the OLT, thus realizing stable and reliable hand-in-hand protection switching and greatly reducing power consumption and cost.

Description

technical field [0001] The present invention relates to hand-in-hand protection switching (PON protection switching in Ethernet passive optical network) in EPON access system (abbreviated as EPON system), specifically a hand-in-hand protection switching method in EPON access system and system. Background technique [0002] Ethernet Passive Optical Network (EPON) is a low-cost, high-capacity new optical fiber access network technology that integrates common Ethernet technology and cheap passive optical devices. It adopts point-to-multipoint structure, passive optical fiber transmission, and can support multiple services such as data, voice and video at the same time. Therefore, it combines the advantages of PON technology and Ethernet technology: low cost, high bandwidth, high scalability, strong compatibility, convenient management, and flexible service bearing methods. [0003] A typical EPON system (EPON access system) consists of an Optical Line Terminal (OLT), an Optic...

AI Technical Summary

Problems solved by technology

[0005] (1) The optical fiber is cut off or the signal quality of the optical path is degraded;

[0006] (2) The optical module is faulty or the transceiver performance is degraded;

[0007] (3) OLT or ONU hardware failure

The disadvantages of this solution are: the ONU structure of the dual PON MAC is relatively complex, and the power consumption and cost are high; it is usually necessary to manually ensure that the configuration data of the two PON MACs are exactly the same, and the workload of device activation and maintenance is relatively large

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