Ethernet passive optical network (EPON) system with hand-in-hand protection structure

A protection structure, hand-in-hand technology, applied in the field of EPON systems, can solve the problems of increasing infrastructure costs and complex structures, and achieve the effect of saving infrastructure costs and maintaining the effect of optical path protection
CN102932698AActive Publication Date: 2013-02-13WUHAN YANGTZE OPTICAL TECH
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
WUHAN YANGTZE OPTICAL TECH
Publication Date
2013-02-13

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Abstract

The invention discloses an Ethernet passive optical network (EPON) system with a hand-in-hand protection structure. The EPON system with the hand-in-hand protection structure comprises two optical line terminals, a light distribution network and a plurality of optical network units. Each optical line terminal comprises at least a pair of passive optical network (PON) ports, the light distribution network comprises at least a three-fiber optical caple, three optical fibers are all connected with a plurality of light branching units, the first optical fiber is connected with a PON port of the first optical line terminal, the second optical fiber is connected with a PON port of the second optical line terminal, the third optical fiber is connected between the other PON port of the first optical line terminal and the other PON port of the second optical line terminal, and the middle portion of the third optical fiber is cut off. The optical network unit is respectively connected to the two optical line terminals through a pair of light branching units to form the hand-in-hand structure, one light branching unit of the pair of light branching units is placed on the first optical fiber or on the second optical fiber, and the other light branching unit of the pair of light branching units is placed on the third optical fiber. The EPON system with the hand-in-hand protection structure can be used in large-scale engineering, so that infrastructure cost can be saved, and the protection effect of an original optical path can be kept.
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Description

technical field

[0001] The invention relates to the optical path multiplexing technology in EPON (Ethernet Passive Optical Networks based on Ethernet), in particular to an EPON system with a hand-in-hand protection structure. Background technique

[0002] The PON (Passive Optical Network) system is composed of three parts: OLT (OpticalLine Terminal), ODN (Optical Distribution Network) and ONU (Optical Network Unit). In the downstream direction (from the optical line terminal to the optical network unit), the signal sent by the optical line terminal reaches each optical network unit through the optical distribution network, and in the upstream direction (from the optical network unit to the optical line terminal), the signal sent by the optical network unit It will only reach the optical line terminal, but not other optical network units. The optical distribution network consists of optical fibers and one or more passive optical devices such as passive optical splitters, pro...

Claims

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