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OADM site

A technology of optical add-drop multiplexing and site, applied in the direction of wavelength division multiplexing system, etc., can solve the problems of business operation and maintenance inconvenience, user loss, capacity expansion, etc., to achieve convenient business operation and maintenance, simple control, and simple expansion operation Effect

Active Publication Date: 2006-12-27
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

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Embodiment 1

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

[0038] On the west link, the input end of the 2×2 optical switch of the first switching device S10 in the through state is connected to the ...

Embodiment 2

[0047] Such as Figure 6 As shown, the difference between the optical add / drop multiplexing site 20 of the second embodiment of the present invention and the optical add / drop multiplexing site 10 of the first embodiment is that it is set in the first optical add / drop multiplexing module OADM1 and the second optical add / drop multiplexer module OADM1. The first switching device S20 and the second switching device S21 on the optical path of the pass-through service level connection port between the module 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 Input terminal, one output terminal is connected to one input terminal of 1×2 optical switch SW1, the output terminal of 1×2 optical switch SW1 is the pass-through service output terminal, the other input terminal B of 1×2 optical switch SW1 and the first coupler The other output terminal A of C1 is the expansion input terminal and the expansion...

Embodiment 3

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

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

Claims

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Application Information

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