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Method for allocating bandwidth in an optical network

An optical network and bandwidth technology, applied in the direction of electromagnetic network arrangement, multiplexing communication, wavelength division multiplexing system, etc., can solve the problems of difficult price/energy consumption growth control, waste of non-congested link transparent bandwidth, etc. To achieve the effect of low complexity

Inactive Publication Date: 2017-05-24
ALCATEL LUCENT SAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method wastes transparent bandwidth in uncongested links and the opacity requires a lot of OEO resources
This makes it difficult to control price / power consumption growth per connection against targeted capacity growth

Method used

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  • Method for allocating bandwidth in an optical network
  • Method for allocating bandwidth in an optical network
  • Method for allocating bandwidth in an optical network

Examples

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Embodiment Construction

[0025] Specific non-limiting technical examples of the invention will now be described.

[0026] figure 1 is a diagram representing the relationship between the 50GHz grid and the 25GHz grid as defined by the International Telecommunication Union (ITU), and figure 2 is an example showing a 25GHz grid and the allowed spectrum allocation for channels of 50GHz width according to the present invention.

[0027] The bandwidth grid as defined by the ITU is such that the center frequency of the nth 50GHz bandwidth segment corresponds to the center frequency of the (2*n-1)th 25GHz bandwidth segment. Thus, the 50GHz bandwidth segment at least partially overlaps with three other 25GHz bandwidth segments.

[0028] The bandwidth grid as proposed herein is such that the center frequency of a 50GHz bandwidth segment lies between the center frequencies of two other 25GHz bandwidth segments. Thus, the 50GHz bandwidth segment overlaps, preferably completely overlaps, two other 25GHz bandwi...

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Abstract

A method for allocating bandwidth in an optical network is presented. A bandwidth grid is provided that includes a first bandwidth segment of lower bandwidth and a higher bandwidth segment of higher bandwidth. A set of requests for respective data transfer connections with respective data rates and respective shortest path metrics is provided. Provides shorter distances over which data signals may be transparently transmitted at a corresponding data rate within a lower bandwidth and longer distances over which data signals may be transparently transmitted at a corresponding data rate within a higher bandwidth through the longer distance. Bandwidth segments of lower bandwidth are assigned to those data transfer connections of said data transfer connections whose respective shortest path metrics are smaller than their respective shorter distances. Finally, the other ones of said data transmission connections are allocated bandwidth segments of lower bandwidth or higher bandwidth with the corresponding amount of necessary OEO regeneration.

Description

technical field [0001] The present invention relates to the field of transparent optical networks. More specifically, the present invention relates to a system and method for channel allocation in a transparent optical network. Background technique [0002] The steady increase in capacity demand for transport core networks requires cost-effective solutions to increase the traffic volumes that can be carried by already deployed fiber optic infrastructure. Current network architectures based on a single grid wavelength allocation scheme (e.g., 50GHz or 100GHz grids as defined by the International Telecommunication Union's Telecommunication Standardization Sector or ITU-T) can lead to congestion of some links and blocking in a portion of the network , while the spectral bandwidth remains available in other parts of the network. Therefore, in order to keep pace with the increasing capacity demands in fiber-constrained environments, it is necessary to push for higher network ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04J14/02H04L47/724H04L45/125
CPCH04J14/0254H04B10/27
Inventor O·里瓦尔A·莫蕾亚
Owner ALCATEL LUCENT SAS
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