Method for grooming multilayer multi-granularity traffic in waveband switching optical network

Abstract

The invention provides a method for grooming multilayer multi-granularity traffic in waveband switching optical network, belonging to the technical field of communication network. The method comprises the following steps: constructing a waveband switching optical network supporting multilayer multi-granularity traffic grooming; deploying MG-OXC+DXC for all optical nodes in the network; using an ML-MG-IAG method for grooming the IP layer low-speed traffic of the local upper route into light paths; grooming the traffic into the light path directly if the excess bandwidth of the light path is not zero; grooming the traffic in a cascade light path if no transceiver can be used at the two end points of the light path, otherwise, blocking the light path. The invention relates to the IP layer, awavelength plane layer, a wave band plane layer and the like and uses wavelength conversion technology in a wave band, thus saving the number of all-optical cross transmission ports and lowering traffic blocking rate.

Description

technical field [0001] The invention belongs to the technical field of communication networks, and in particular relates to a multi-layer and multi-granularity service volume dredging method in a band switching optical network. Background technique [0002] At present, most of the researches on multi-granularity traffic grooming methods are concentrated in double-layer dual-granularity optical networks. For example, a sub-wavelength level traffic grooming method and a waveband switching method. [0003] Sub-wavelength-level traffic grooming, also known as traffic grooming, is a double-layer dual-granularity traffic grooming method based on the IP plane and the wavelength plane. Among them, the sub-wavelength level business refers to the finer-grained business that is less than the capacity of an entire wavelength. . [0004] Sub-wavelength-level traffic grooming, such as IGA, adopts a node structure with wavelength conversion capability, which greatly reduces the service b...

AI Technical Summary

Problems solved by technology

[0004] Sub-wavelength-level traffic grooming, such as IGA, adopts a node structure with wavelength conversion capability, which greatly reduces the service blocking rate; business blocking rate; after a service with a capacity of approximately one full wavelength is carried by an optical path, the optical path will no longer be able to carry other services, losing the use value of traffic grooming, and generating a large number of optical path fragments, reducing the resource utilization of the entire network

The main problem is that although the number of optical cross-connection ports in the entire network can be reduced, and the high-capacity waveband can carry coarser-grained service connection requests, some finer-grained service connection requests may be carried, which may cause The number of services carried in one waveband increases, although the service blocking rate of the entire network is reduced, but a large number of all-optical crossovers with demultiplexing / multiplexing functions in MG-OXC are consumed port

However, these band switching methods are only applicable to the two transmission planes of wavelength and band, and do not involve the IP layer

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