A cluster-based traffic grooming and differentiation importance protection method

Abstract

The invention discloses a traffic grooming and distinction importance protection method based on clustering, and belongs to the technical field of communication networks. The method includes the following steps that a network is divided into clusters, and services in the clusters are directly groomed through a layered auxiliary picture; the shortest paths between the clusters are looked for by means of a cluster convergence layer for the services between the clusters and then are mapped onto the layered auxiliary picture for grooming; according to the situation of multiple priority services in an independent wavelength after grooming, importance of wavelength links is distinguished; by means of an intelligent telescopic P ring, grading protection is effectively carried out. By means of the method, dynamic services are quickly and efficiently groomed, and the utilization rate of network resources is greatly improved; meanwhile, different service quality guarantees are achieved through distinction of the importance of the link wavelengths, the situation that resources are seriously wasted due to the fact that the services are protected one by one in a traditional method is avoided by means of P-Cycle comprehensive protection, arriving and leaving of the services can be perceived, the P ring is dynamically extended and retracted, current network intelligent requirements are met, protection resource cost is greatly reduced, and the network capacity of bearing the services is improved.

Description

technical field [0001] The invention belongs to the technical field of communication networks, and relates to a clustering-based service flow grooming and importance degree protection method in a WDM network. Background technique [0002] At present, the data rate of WDM network services generally ranges from 155Mbps (OC-3) to 622Mbps (OC-12), but the wavelength rate is dozens or even hundreds of times of that. In traditional routing, one low-speed service occupies one wavelength exclusively, which wastes a lot of bandwidth resources. In order to effectively utilize resources, traffic grooming technology emerges as the times require. After grooming, each wavelength carries a larger amount of business data. Once a fault occurs, the loss will be serious, and it must be properly protected. Since the number of services with different priorities in the converged flow after grooming is different, protection should be differentiated. Strength can be more reasonable and effective....

AI Technical Summary

Problems solved by technology

In "Probabilistic Differentiated Availability Services inWDMNetworks Protected by Shared Protection Schemes", Alshaer H et al., aimed at diverting IP services, differentiated the needs of high-level and low-level services and selected shared protection channels with different reliability, which can reduce the network congestion rate, but it does not Considering that the number of services at each level in each wavelength is different after grooming, simply protecting services at all levels may consume too much protection resources, and shared protection cannot achieve the effect of complete protection

In short, the traditional ILP grooming model takes too long, group grooming is only for static services, and the efficiency of global pathfinding is still not high with the help of auxiliary graph grooming, and the existing grooming protection generally only differentiates and protects services at all levels. Conservation resources may be too expensive

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