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Wavelength resource encoding method, wavelength resource processing method and node for flexible grid optical network

An optical network node and wavelength resource technology, applied in wavelength division multiplexing systems, optical multiplexing systems, selection devices for multiplexing systems, etc. Handling methods etc.

Inactive Publication Date: 2013-05-01
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But at present, there is no coding method and processing method suitable for wavelength resources of flexible grid network in the industry

Method used

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  • Wavelength resource encoding method, wavelength resource processing method and node for flexible grid optical network
  • Wavelength resource encoding method, wavelength resource processing method and node for flexible grid optical network
  • Wavelength resource encoding method, wavelength resource processing method and node for flexible grid optical network

Examples

Experimental program
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Effect test

Embodiment 1

[0052] A wavelength resource encoding method for a flexible grid optical network provided in this embodiment includes:

[0053] The parameters representing the wavelength resources include position information of the center frequency in the frequency spectrum, resource bandwidth size information, and grid capability information; the grid capability information indicates whether the wavelength resource is a flexible grid or a fixed grid.

[0054] Further, the parameters include the channel spacing granularity field C.S., which represents the field n of the position information of the center frequency in the frequency spectrum; the channel spacing granularity field and the field n are both included in the wavelength label; Figure 2a As shown, the wavelength label also includes the following fields: Grid, Identifier; the center frequency is determined according to the n and C.S.;

[0055] The grid capability information is determined by the value of the grid capability identific...

Embodiment 2

[0096] In the above application example 4, after the PCE or other nodes send the message carrying the wavelength label to the flexible grid optical network node, as Figure 7 As shown, the flexible grid optical network node performs the following steps:

[0097] Step 701: The flexible grid optical network node receives the message carrying the parameter of the wavelength resource, and the parameter includes the position information of the center frequency in the frequency spectrum, the information of the resource bandwidth size and the grid capability information;

[0098] Wherein, the grid capability information indicates whether the wavelength resource is a flexible grid or a fixed grid.

[0099] Further, the above parameters may also include a newly created object (such as a bandwidth object) carrying a bandwidth size.

[0100] Step 702: The flexible grid optical network node analyzes whether the wavelength resource corresponds to a flexible grid or a fixed grid according ...

Embodiment 3

[0109] Corresponding to the above wavelength resource processing method, this embodiment also provides a flexible grid optical network node, such as Figure 8 As shown, the node includes:

[0110] The message receiving module is configured to receive a message carrying a wavelength resource, the message includes a parameter representing the wavelength resource, and the parameter includes position information of the center frequency in the frequency spectrum, resource bandwidth size information, and grid capability information;

[0111] The parsing module is used to determine whether the wavelength label corresponds to a flexible grid or a fixed grid according to the grid capability information in the parameter;

[0112] Specifically, the grid capability information is identified by the grid capability identification field in the parameter. The grid capability identification field can be, but not limited to, the channel interval field in the wavelength label. When it takes a pr...

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PUM

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Abstract

The invention provides a wavelength resource encoding method, a wavelength resource processing method and a node for a flexible grid optical network. The encoding method is characterized in that parameters expressing a wavelength resource comprise position information of a center frequency in a frequency spectrum, information of the bandwidth size of the resource and grid capacity information; and the grid capacity information expresses that the wavelength resource is a flexible grid or a fixed grid. After the scheme of the invention is adopted, by expanding a wavelength label and introducing a new bandwidth object, the encoding and processing methods are suitable for the flexible grid network, so that from the point of a control plane, flooding of flexible grid routing information in the wavelength switched optical network and distribution of spectrum resources in the process that a signaling establish an LSP (Label Switched Path) can be implemented.

Description

technical field [0001] The present invention relates to a method for encoding wavelength resources by a control plane in a wavelength switched optical network (Wavelength Switched Optical Network, referred to as WSON), in particular to a method for encoding wavelength resources in a flexible grid optical network, a processing method and a node. Background technique [0002] At present, in an optical transmission network, a dense wavelength division multiplexing (Dense Wavelength Division Multiplexing: DWDM for short) technology is generally used to carry service data signals. A single wavelength carries one service signal, and the center frequency interval between adjacent wavelengths is usually fixed at 50 GHz (or 100 GHz), and the spectrum bandwidth resource allocated to each wavelength is also fixed at 50 GHz (or 100 GHz). With the growth of IP data Internet traffic and the emergence of high-speed services such as video on demand, high-definition TV, and cloud computing, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04Q11/00H04L1/00
CPCH04J14/026H04J14/0267H04J14/0258H04L45/50H04L45/32H04L47/724H04L45/62H04J14/02H04Q11/00
Inventor 黎遥
Owner ZTE CORP
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