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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

Active Publication Date: 2013-02-13
WUHAN YANGTZE OPTICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the improved four-bus hand-in-hand protection structure can increase the number of PON ports and the number of buses on the OLT, its structure is complex and requires four optical fibers, which increases the cost of infrastructure construction

Method used

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

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Embodiment Construction

[0020] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0021] Such as Figure 5 As shown, the embodiment of the present invention has an EPON system with a hand-in-hand protection structure, including two optical line terminals OLT1 and OLT2, an optical distribution network, and a plurality of optical network units ONU. In one embodiment of the present invention, there are 2n optical A network unit includes OUN1, OUN2...ONUn, ONUn+1...OUN2n, where n is a natural number. Each optical line terminal includes at least one pair of PON ports, and the optical distribution network includes at least one three-core optical cable, and multiple optical splitters ...

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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.

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04Q11/00H04B10/25
Inventor 胡保民董进郑直叶勇刚任波唐俊
Owner WUHAN YANGTZE OPTICAL TECH
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