Non-blocking expansion system and method based on multiple disjoint unidirectional optical fiber ring networks

Abstract

A non-blocking expansion system and method based on multiple disjoint unidirectional optical fiber ring networks, the system includes three stages: an input stage, an intermediate stage and an output stage, wherein both the input stage and the output stage are composed of space division switching modules; The intermediate stage is composed of multiple disjoint WDM switching modules including the unidirectional optical fiber ring network, allowing arbitrary input-to-output mapping; the connection of the intermediate stage unidirectional optical fiber ring conforms to the basic characteristics of the Clos network, and is logically consistent with the input The output stages are connected one by one through optical fiber ports; the number n of the input and output stage module ports should be consistent, and the number should not be greater than the number M of the intermediate stage switching modules. At the same time, a specific implementation method of using the system to complete non-blocking expansion is provided. The invention increases network capacity at low cost and high efficiency, flexibly and effectively utilizes all optical fiber ring link resources, improves the utilization rate of wavelength resources in the network, eliminates network blocking rate, and is beneficial to the realization of future high-performance optical networks.

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 deficiencies of traditional electrical packet switching networks. 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 In...

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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