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OADM site

An optical add-drop multiplexing and site technology, applied in wavelength division multiplexing systems and other directions, can solve problems such as inconvenient business operation and maintenance, user loss, capacity expansion, etc., to achieve convenient business operation and maintenance, simple control, and simple expansion operations. Effect

Active Publication Date: 2011-05-04
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the OADM site composed of dedicated OADM modules has only a few wavelength services at the beginning. With the growth of node traffic, capacity expansion is the main problem it faces
At present, to expand the capacity of this OADM site, it is necessary to disconnect the optical fibers passing through between the two OADM modules and connect them in series to the expanded OADM modules. The services of other wavelengths in the optical fiber are interrupted, that is to say, the services passing through this site will be interrupted when the OADM site is expanded.
Due to the large granularity of services on the WDM system, usually each wavelength has more than 1G services, so interrupting services will bring great losses to users
[0007] In addition, because the OADM site implementation method has a greater cost advantage than the other two methods, it has been adopted on a large scale. In order to reduce the impact on the business during expansion, the expansion operation generally needs to be performed at night when the business traffic is small. Although this can reduce some losses, it will bring great inconvenience to the operation and maintenance of the business

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0037] Such as Figure 4 As shown, the first optical add-drop multiplexing site 10 of the present invention includes the first optical add-drop multiplexing module OADM1, the second optical add-drop multiplexing module OADM2 and the first optical add-drop multiplexing module OADM1 and the second optical add-drop multiplexing module OADM1. The first switching device S10 and the second switching device S11 on the optical path of the service level connection are connected between the two optical add-drop multiplexing modules OADM2. In this embodiment 1, the first and second switching devices S10 and S11 are 2×2 optical switches, and the input and output terminals of the straight-through state are respectively the input and output terminals of the pass-through service, and the other two ports are respectively the expansion input terminal and expansion output terminal.

[0038] On the west link, the input terminal of the through state of the 2×2 optical switch of the first switchi...

Embodiment 2

[0047] Such as Image 6 As shown, the difference between the optical add-drop multiplexing site 20 in Embodiment 2 of the present invention and the optical add-drop multiplexing site 10 in Embodiment 1 is that it is located in the first optical add-drop multiplexing module OADM1 and the second optical add-drop multiplexing module OADM1. The first switching device S20 and the second switching device S21 on the optical path of the pass-through service level connection between modules OADM2 each include a first coupler C1 and a 1×2 optical switch SW1, wherein the input end of the first coupler C1 is a pass-through service The input terminal and one output terminal are connected to one input terminal of the 1×2 optical switch SW1, the output terminal of the 1×2 optical switch SW1 is the pass-through service output terminal, and the other input terminal B of the 1×2 optical switch SW1 is connected to the first coupler The other output terminal A of C1 is respectively an expansion i...

Embodiment 3

[0056] Such as Figure 8 As shown, the difference between the optical add-drop multiplexing station 30 in Embodiment 3 of the present invention and the optical add-drop multiplexing station 20 in embodiment 2 is that it is located in the first optical add-drop multiplexing module OADM1 and the second optical add-drop multiplexing module OADM1. The first switching device S30 and the second switching device S31 on the optical path of the pass-through service level connection between the modules OADM2 replace the 1×2 optical switch with a coupler, each including a second coupler C2 and a third coupler C3, wherein the first The input end of the second coupler C2 is the pass-through service input end, an output end is connected to an input end of the third coupler C3, the output end of the third coupler C3 is the pass-through service output end, and the other end of the third coupler C3 An input terminal D and another output terminal C of the second coupler C2 are capacity expansio...

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Abstract

The provided optical add-drop multiplexing site comprises: a first / second optical add-drop multiplexing module in series, a first / second switch device every with business I / O end and flash I / O end arranged on business-level light path between former modules. This invention is convenient to enlarge business, reduces effect of interruption, and needs just low cost.

Description

technical field [0001] The invention relates to the field of wavelength division multiplexing communication, in particular to an optical add-drop multiplexing station formed by a special optical add-drop multiplexing module which is convenient for business expansion. Background technique [0002] Driven by the rapid growth of data services, a Wavelength Division Multiplexing (WDM for short) system has developed rapidly. The principle of wavelength division multiplexing is to use light of different wavelengths to transmit services in one optical fiber, and the light of each wavelength can transmit one service independently without being affected by other channels. There are four typical sites for WDM systems: Optical Terminal Multiplexer (OTM for short), Optical Line Amplifier (OLA for short), Regenerator (REG for short), and optical Add-drop multiplexing equipment (Optical Add and Drop Multiplexing, referred to as OADM), such as figure 1 As shown, the OTM and OADM sites ar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04J14/02
Inventor 乔瑞军别体军
Owner HUAWEI TECH CO LTD
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