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Method and device for protecting trunk fibers of wavelength division multiplex (WDM) passive optical network (PON)

A passive optical network and optical fiber protection technology, applied in the field of optical networks, can solve the problems of service interruption, affecting ONU, and unresearched WDMPON service protection.

Inactive Publication Date: 2010-02-17
ZTE CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the above two network topologies, the backbone fiber refers to the fiber between the OLT and the splitter. Once the backbone fiber fails, it may affect the following batches of ONUs, and even cause their business to be interrupted. Therefore, the backbone fiber is very important, but Currently there is no research on service protection in WDM PON

Method used

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  • Method and device for protecting trunk fibers of wavelength division multiplex (WDM) passive optical network (PON)
  • Method and device for protecting trunk fibers of wavelength division multiplex (WDM) passive optical network (PON)

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Embodiment 1

[0052] Embodiment 1. In the embodiment of the present invention, the WDM PON network topology includes two backbone optical fibers, one is the active backbone optical fiber, and the other is the backup backbone optical fiber. Figure 2(a) or Figure 2(b) shows the topological diagram for implementing trunk fiber protection. Among them, the OLT has the function of protecting the main optical fiber. The two physical interfaces of the OLT are respectively connected to two independent trunk fibers. These two trunk fibers are connected to the same wave splitter at the same time. The wave splitter is a 2×N wave splitter, and the wave splitter can be an array The waveguide grating (ArrayedWaveguide Grating, AWG) can also be other technologies, and its role is to multiplex / demultiplex wavelengths. For the WDM PON of the colorless ONU technology, wavelength conversion is also involved. If it is a WDM hybrid PON, the demultiplexer can be connected to a splitter, and then connected to an ...

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Abstract

The invention discloses a method and a device for protecting trunk fibers of a wavelength division multiplex (WDM) passive optical network (PON). The method is applied to an optical line terminal (OLT) side of a WDM PON comprising at least two trunk fibers; and an OLT comprises at least two physical interfaces which are respectively connected with the corresponding trunk fibers in the WDM PON to form a trunk fiber link. The method comprises the following steps: detecting whether a first trunk fiber link connected with a first physical interface fails or not; and switching from the first trunkfiber link to a second trunk fiber link connected with a second physical interface if the first physical interface fails.

Description

technical field [0001] The invention relates to the technical field of optical networks, in particular to a method and device for protecting backbone optical fibers of a wavelength division multiplexing passive optical network. Background technique [0002] With the rapid growth of the access network's demand for service bandwidth, the development of optical communication technology and the reduction of costs, optical fiber communication is transparent to services, long in life, almost unlimited in bandwidth carrying capacity, and can adapt to growing bandwidth and new services. Due to the characteristics of development needs, it has become an important way of access layer network construction, "light into copper back", that is, optical nodes are gradually moved down, fiber to the premise (Fiber To The Premise, FTTP), fiber to the building (Fiber To The Building) , FTTB), fiber to the office (Fiber To The Office, FTTO) and fiber to the home (Fiber To The Home, FTTH), have be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/08H04B1/74H04J14/02H04B10/038H04B10/075
Inventor 俞杰
Owner ZTE CORP
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