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Method for distributing routing wavelength of intelligent optical network supporting differentiated services

A technology of intelligent optical network and wavelength allocation, which is applied in the direction of data switching network, selection device of multiplexing system, digital transmission system, etc., can solve the problem of high average blocking rate of the network, RWA scheme does not take into account different attributes of services, connection Request blocking and other issues, to improve the utilization of network resources and avoid the waste of wavelength resources

Inactive Publication Date: 2012-09-26
NANJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

The disadvantage is that the average blocking rate of the network is high, because when the resources on this route have been exhausted, all connection requests are blocked
[0011] The main disadvantage of the RWA scheme in the existing optical network is that it does not take into account the different attributes (priorities) of services and allocate wavelengths accordingly

Method used

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  • Method for distributing routing wavelength of intelligent optical network supporting differentiated services
  • Method for distributing routing wavelength of intelligent optical network supporting differentiated services
  • Method for distributing routing wavelength of intelligent optical network supporting differentiated services

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Embodiment Construction

[0038] The technical scheme of the present invention is described in detail below in conjunction with accompanying drawing:

[0039] The intelligent optical network wavelength allocation method supporting differentiated services of the present invention is based on the idea of ​​introducing service priorities into the wavelength allocation of intelligent optical networks, assigning different priorities to various services, and grouping available wavelengths, each level of service Allocate the corresponding wavelength group, when the service arrives, first search for idle wavelengths from the wavelength group corresponding to its priority, if there is no idle wavelength, then search for idle wavelengths from the wavelength group corresponding to the lower priority, and the higher priority Services can occupy idle wavelengths in lower priority wavelength groups, but not vice versa. Thus, wavelength resources for high-priority services are guaranteed.

[0040] In the technical s...

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Abstract

The invention discloses a method for distributing wavelength of an intelligent optical network supporting differentiated services. The method comprises the following steps: giving different priorities to various services, and grouping the available wavelength according the priorities, wherein each priority corresponds to one wavelength group; searching free wavelength in the corresponding wavelength groups of the priorities according to the priorities of the services when the services come; if the free wavelength is in the wavelength groups, distributing the wavelength for the service, if the free wavelength is not in the wavelength groups, searching the free wavelength in the corresponding wavelength groups of the priorities according to the order of the priorities from high to low and distributing the wavelength for the service, and the free wavelength is still not in the wavelength groups, then refusing the service, wherein the wavelength groups are periodically and dynamically adjusted according to the pre-set period. The invention further discloses a method for distributing routing wavelength of the intelligent optical network supporting differentiated services. The method provided by the invention can guarantee the wavelength resources of the high-priority service and can improve the utilization rate of the network resource.

Description

technical field [0001] The present invention relates to an optical network routing wavelength (RWA: Routing and Wavelength Assignment) assignment method, in particular to an intelligent optical network (ION) routing wavelength assignment method based on WDM / DWDM, in which wavelength groups are assigned according to service priority attributes, Reaching the requirement of reducing the blocking rate of high-level services belongs to the technical field of optical communication. Background technique [0002] Routing and wavelength allocation are one of the core issues of optical networks. In the intelligent optical network (ION) built on the basis of WDM / DWDM, the business between different node pairs needs to find a suitable route and allocate a suitable wavelength in the optical network. The RWA algorithm can be divided into static RWA (SRWA) and dynamic RWA (DRWA) according to the characteristics of the service. SRWA needs to select routes and allocate wavelengths for pre-...

Claims

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Application Information

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IPC IPC(8): H04L12/56H04Q11/00H04L12/911
Inventor 沈建华王孝莲
Owner NANJING UNIV OF POSTS & TELECOMM
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