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Method, system and node device for building wavelength cross connection

A technology of wavelength cross-connection and node equipment, which is applied in the field of network communication and can solve the problems of low reliability and complex implementation.

Active Publication Date: 2014-07-09
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Embodiments of the present invention provide a method, system, and node device for establishing wavelength cross-connection, which solve the problems of complex implementation and low reliability in the prior art

Method used

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  • Method, system and node device for building wavelength cross connection
  • Method, system and node device for building wavelength cross connection
  • Method, system and node device for building wavelength cross connection

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0246] Embodiment 1. This embodiment of the present invention provides a method for establishing a wavelength cross-connect. Such as image 3 In the shown WDM network, the connection lines between nodes A, B, C, and D represent optical fiber links.

[0247] The network management or client notifies node A to establish image 3 For the wavelength connection between node A interface 1 and node C interface 6, the spectrum bandwidth requirement is 50GHz, and the center frequency is f -8 =193.1+(-8×6.25 / 1000)=193.05 THz. Node A calculates or obtains the route of the wavelength connection through the network management as (A, B, C), namely (interface 1, interface 2, interface 3, interface 4, interface 5, interface 6), then node A is the source node, node B is an intermediate node, and node C is a sink node. The method specifically includes the following steps:

[0248] In step S201, node A sends a request message carrying center frequency information and spectrum bandwidth info...

Embodiment 2

[0273] Embodiment 2. This embodiment of the present invention provides a method for establishing a wavelength cross-connect. Such as image 3 In the shown WDM network, the connection lines between nodes A, B, C, and D represent optical fiber links.

[0274] The network management or client notifies node A to establish image 3 For the wavelength connection between interface 1 of node A and interface 6 of node C, the spectral bandwidth requirement is 50 GHz. Node A calculates or obtains the route of the wavelength connection through the network management as (A, B, C), namely (interface 1, interface 2, interface 3, interface 4, interface 5, interface 6), then node A is the source node, node B is an intermediate node, and node C is a sink node. The method specifically includes the following steps:

[0275] In step S301, node A determines the spectral bandwidth of the wavelength connection, and obtains a set of available central frequencies of link A-B according to the spectr...

Embodiment 3

[0306] Embodiment 3, the embodiment of the present invention provides a method for establishing a wavelength cross-connect. Such as image 3 In the shown WDM network, the connection lines between nodes A, B, C, and D represent optical fiber links.

[0307] The network management or client notifies node A to establish image 3 For the wavelength connection between interface 1 of node A and interface 6 of node C, the spectral bandwidth requirement is 50 GHz. Node A calculates or obtains the route of the wavelength connection through the network management as (A, B, C), namely (interface 1, interface 2, interface 3, interface 4, interface 5, interface 6), then node A is the source node, node B is an intermediate node, and node C is a sink node. The method specifically includes the following steps:

[0308] In step S401, node A determines the spectrum bandwidth of the wavelength connection; sends a request message to node B, and the request message carries idle center frequenc...

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Abstract

The present invention relates to the field of network communication, and specifically discloses a method for establishing a wavelength cross-connection, including: a first node determines the spectrum bandwidth of the wavelength connection, and obtains a first set of available center frequencies of the first link according to the spectrum bandwidth; the first link The road is the link between the first node and the adjacent nodes in the direction from the first node to the second node; the first node obtains the first available central frequency set information corresponding to the first available central frequency set and the spectral bandwidth information corresponding to the spectral bandwidth , sending a request message carrying the first available center frequency set information and spectrum bandwidth information to the adjacent nodes in the direction from the first node to the second node; the first node receives the response message, extracts the center frequency information carried in the response message, and obtains The center frequency of the wavelength connection, and the wavelength cross-connection is established based on the spectrum range determined by the center frequency and the spectrum bandwidth. The embodiment of the invention also discloses a node device and system for establishing wavelength cross-connection.

Description

technical field [0001] The invention relates to network communication technology, in particular to a method, system and node equipment for establishing wavelength cross-connection. Background technique [0002] The wavelength connections in the WDM network are carried by optical fiber links, and each wavelength connection needs to occupy a certain amount of optical fiber spectrum resources. Usually, available spectrum resources in an optical fiber are divided into fixed spectrum intervals, each spectrum interval is used as a wavelength channel to carry a wavelength connection, and the bandwidth of the wavelength connections carried in the same optical fiber is the same. As a result, when services with different bandwidth requirements are transmitted using mixed wavelength connections, it is necessary to divide the spectrum resources of the optical fiber into wavelength channels according to the services with the largest bandwidth requirements, while other services with small...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04Q11/00H04B10/20
CPCH04Q11/0005H04J14/0213H04J14/0212
Inventor 资小兵
Owner HUAWEI TECH CO LTD