Conflict Resolution Method for All-optical Nodes in Space-Division Multiplexing Elastic Optical Networks

Abstract

The invention relates to a conflict resolution method for an all-optical node of a space-division multiplexing elastic optical network based on a shared limited spectrum converter and an optical fiber delay line, and belongs to the technical field of optical communication. The method of the present invention configures the shared limited spectrum converter and the fiber delay line in the all-optical node of the space-division multiplexing elastic optical network; comprehensively considers the proportion of idle spectrum of the fiber core and the proportion of idle spectrum block in the all-optical node and different fiber core spectrum utilization ratios, the conflicting business is switched in the airspace to solve the conflict problem; when the airspace cannot resolve the conflict, the maximum frequency slot index occupied by the spectrum in the fiber delay line and the idle spectrum block in the fiber delay line are considered comprehensively. The proportion of finite spectrum converters, the number of limited spectrum converters and their conversion range, the resource measurement formula of idle spectrum blocks in the fiber delay line is designed, and based on this, a minimum spectrum discrete conversion degree algorithm is proposed to solve conflicting business scheduling in the time-frequency domain problem, reduce service bandwidth blocking rate and cache delay.

Description

technical field [0001] The invention belongs to the technical field of optical communication, and relates to a conflict resolution method for an all-optical node of an elastic optical network with space division multiplexing. Background technique [0002] In recent years, with the rapid development of new Internet protocol applications, such as high-definition television, interactive games, the Internet of Things, and cloud computing, the scale of equipment has gradually increased, and the network load has gradually increased. On the other hand, different applications have also caused Differentiated bandwidth requirements. The traditional wavelength division multiplexing network using single-core, single-mode fiber divides the frequency spectrum into channels of wavelength units. This fixed-grid network will cause bandwidth waste, and it is difficult to meet high-speed, different-granularity bandwidth requirements for service transmission. In the elastic optical network bas...

AI Technical Summary

Problems solved by technology

When a large number of data services are transmitted in the space division multiplexing elastic optical network, due to the limited number of port transceivers in the all-optical node, when the service passes through the all-optical node, it will cause conflicts due to contention for port spectrum resources

If there is no effective all-optical node structure and resource competition conflict resolution algorithm applied in the space division multiplexing elastic optical network, a large number of services will be blocked, causing network paralysis

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