Non-blocking extended system and method based on multiple non-intersected unidirectional fiber ring networks

Abstract

The invention discloses a non-blocking extended system and method based on multiple non-intersected unidirectional fiber ring networks, and the system comprises an input stage, a central stage, and an output stage, wherein the input stage and the output stage respectively consists of a space division switching modules. The central stage consists of a plurality of non-intersected wavelength division switching modules comprising unidirectional fiber ring networks, and allows any mapping from input to output. The connection of unidirectional fiber rings of the central stage accords with the basic features of a Clos network, and the central stage is in one-one connection with the input and output stages through fiber ports. The number n of module ports of the input is consistent with the number n of module ports of the output stages, wherein n is not greater than the number M of switching modules of the central stage. The invention also provides a specific implementation method for completing the non-blocking extension through employing the system. The method and system increase the network capacity efficiently at low cost, employs all fiber link resources flexibly and effectively, improve the utilization rate of wavelength resources in a network, reduce the blocking rate of the network, and facilitate the implementation of a high-performance optical network in the future.

Description

technical field [0001] The invention relates to a non-blocking expansion method based on multiple disjoint unidirectional optical fiber ring networks, and can be widely used in the field of optical circuit switching technology including ultra-large-scale data centers. Background technique [0002] The "big flow" and "small flow" characteristics of the data center have led to changes in the data center network, and the evolution from the all-electric network to the photoelectric hybrid network. Many research institutions have adopted optical circuit switching (optical circuit switching, OCS) to supplement the deficiency of traditional electrical packet switching network. The advantage of OCS lies in reducing power consumption, cost and port count. As the scale of the data center becomes larger and the floor space becomes wider and wider, the development trend of OCS: high scalability, non-blocking, simple connection, modular design, etc. [0003] In the actual optical Inter...

AI Technical Summary

Problems solved by technology

[0007] In the past one or two years, the research on the development of unidirectional optical fiber ring has just begun. The various WDM schemes that have been proposed have their own advantages and disadvantages. Large capacity, disjoint, and non-blocking properties

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