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Protection method of multi-stage optical distribution passive optical network (PON) and multi-stage optical distribution PON

A passive optical network and distribution network technology, which is applied in the field of optical communication and passive optical network, can solve problems such as component recovery, achieve the effect of solving recovery problems and improving system reliability

Inactive Publication Date: 2012-09-12
NANJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the deficiencies in the prior art, provide a protection method for a multi-stage optical split passive optical network, and effectively solve the recovery problem after component failure in a multi-stage optical split passive optical network

Method used

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  • Protection method of multi-stage optical distribution passive optical network (PON) and multi-stage optical distribution PON
  • Protection method of multi-stage optical distribution passive optical network (PON) and multi-stage optical distribution PON
  • Protection method of multi-stage optical distribution passive optical network (PON) and multi-stage optical distribution PON

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Embodiment 1

[0027] In this embodiment, only the backbone optical fiber in the secondary optical distribution network is backed up and protected, and the specific implementation process is as follows:

[0028] Step1: Since this protection mechanism mainly protects the backbone fiber, one spare backbone fiber and two 1×2 optical switches need to be pre-configured.

[0029] Step2: Press the above backup components figure 1 Install as shown, one of the optical switches is installed at the connection between the OLT and the two backbone optical fibers, and the other optical switch is installed at the connection between the two backbone optical fibers and the primary optical splitter. At this time, the optical switch is placed on the main system side. Work on the backbone fiber.

[0030] Step3: When it is detected that any element in the protection area fails to work, switch the optical switch at the OLT and the primary optical splitter to the protection line, and at this time, the business on...

Embodiment 2

[0032] In this embodiment, the backbone fiber, the primary splitter, and the primary branch fiber in the secondary optical distribution network are backed up and protected, and the specific implementation process is as follows:

[0033] Step1: Since this protection strategy mainly protects the backbone fiber, the primary splitter and the primary branch fiber, it is necessary to pre-configure one spare backbone fiber, one primary splitter, and a primary branch fiber (assuming that the split ratio of the primary splitter is 1 : A) and 1×2 optical switches (a+1).

[0034] Step2: Press the above backup components figure 2 Install as shown, one of the optical switches is installed at the connection between the OLT and the two backbone optical fibers, and the other a optical switches are installed at the connection of the front end of a secondary optical splitters. At this time, the optical switches are placed on the main system side. The working backbone fiber and primary branch fiber....

Embodiment 3

[0037] In this embodiment, each component in the secondary optical distribution network is backed up and protected, and the specific implementation process is as follows:

[0038] Step1: Since this protection strategy mainly protects the backbone fiber, the primary splitter, the primary branch fiber, the secondary splitter and the secondary branch fiber, it is necessary to pre-configure a spare backbone fiber and a primary splitter (assuming the splitting ratio is 1: a), a primary branch optical fiber, a secondary optical splitter (assuming a splitting ratio of 1:b), ab secondary branch optical fiber, and 1×2 optical switches (ab+1).

[0039] Step2: Install the above backup components according to the red line in the figure. One of the optical switches is installed at the connection between the OLT and the two backbone optical fibers, and the remaining ab optical switches are installed on the ab secondary branch optical fibers and the ONU. At this time, the optical switch is placed...

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Abstract

The invention discloses a protection method of a multi-stage optical distribution PON. The multi-stage optical distribution PON comprises an optical line terminal, a multi-stage optical distribution network and an optical network unit which are connected in sequence. Spare components are installed on at least one component of the multi-stage optical distribution PON by using a 1+1 model. When the at least one component breaks down, business is switched to the spare components to be transmitted. The invention further discloses a multi-stage optical distribution PON using the protection method of the multi-stage optical distribution PON. According to the protection method of the multi-stage optical distribution PON and the multi-stage optical distribution PON, recovery problem of components in the multi-stage optical distribution PON after invalidation is solved effectively, and the system reliability is improved.

Description

Technical field [0001] The invention relates to a protection method for a passive optical network, in particular to a protection method for a multi-level split optical passive optical network, and belongs to the technical field of optical communication and passive optical network. Background technique [0002] The passive optical network (PON, Passive Optical Network) system is mainly composed of the optical line terminal (OLT, Optical Line Terminal) of the central office, the optical distribution network (ODN, Optical Distribution Network) and the optical network unit (ONU, Optical Network Unit) of the user side. composition. The main feature of PON is that ODN is composed of passive equipment, which is not affected by external electromagnetic interference and has high reliability; at the same time, the number of optical transceivers and optical fibers required in the PON system is small, and the system cost is low. [0003] With the rapid growth of Internet users and services, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J14/02H04Q11/00
Inventor 沈建华何晔
Owner NANJING UNIV OF POSTS & TELECOMM
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