Annular double-bus redundancy protection architecture of passive optical network

Abstract

The invention relates to an annular dual-bus redundancy protective structure of passive optical network which includes: an OLT system, an annular net controller and a plurality of light function structure units with special structure. Four input ports of the annular net controller connect with corresponding light switches respectively, four light switches connect with corresponding light coupler modules, each light coupler module connects with a light detection function module and corresponding light source, then, connects with the light function structure through tow channels main fiber, the whole light function structure is composed of N light function structure units; a, b, c, d ports of a light splitter with four ports in the light function structure unit upper part and down part can be concatenated according to figure or connect with the light coupler module, other four ports are cross connected through the coupler or the light switch, then connect with the corresponding ONU; a light resuscitation module can generate four or a plurality of input ports according to need. The annular dual-bus redundancy protective structure has advantages that: using dual-bus annular net structure can reach better protective redundancy effect, increase system reliability, and heal remarkably quickly; the annular dual-bus redundancy protective structure with low cost can realize uniform network management, and is convenient for system integration.

Description

technical field [0001] The invention belongs to the technical field of optical fiber communication, in particular to a ring double bus redundancy protection structure of a passive optical network. Background technique [0002] The traditional APON (ATM Passive Optical Network) or the access network with coaxial cable and twisted pair as the medium can no longer meet the needs of users due to its own defects. The development of EPON (Ethernet Passive Optical Network) is more suitable for the transmission of IP services, which reduces the overhead and greatly reduces the cost; the current PON (Passive Optical Network) technology has been widely used as the "last mile" of the network. The application generally adopts the typical tree topology and the bus structure as its special case. The advantage of this open structure is that the cost is relatively low and the structure is simple. It is mainly composed of the PON module of the OLT (optical line terminal) It is connected to ...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a ring dual bus redundant protection structure for passive optical network, to overcome the poor practicability of the traditional structure, high cost, no real-time monitoring function, and rapid self-healing due to the interruption of the main and standby optical fibers Defects

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