Active Multi-Stream Spectrum Allocation Method Based on Exponentially Divided Frequency Blocks in Elastic Optical Networks

Abstract

The present invention proposes an active multi-stream spectrum allocation method based on exponentially divided frequency blocks in an elastic optical network, the steps of which are: divide the spectrum resources in the network into frequency block segments whose When it arrives, calculate the number of frequency slices required by the connection request; if the number of frequency slices is exactly equal to the size of a certain frequency block, it will be regarded as a stream; otherwise, the connection request will be split into multiple streams, so that each stream The number of required service frequency slices plus 1 is equal to the size of a certain frequency block; find the free frequency block with the largest weighted occupancy index in the corresponding type of frequency block segment on the path; if all the flows in the connection request are found idle Frequency block, use the found free frequency block to establish a connection for each stream of the connection request; otherwise, the connection request is rejected. The present invention can achieve the triple effects of simplifying the node structure, reducing the complexity of resource allocation, and reducing the blocking rate of connection requests; and the frequency spectrum resources can be used more effectively.

Description

technical field [0001] The present invention relates to the technical field of elastic optical networks, in particular to an active multi-flow frequency spectrum allocation method based on exponentially divided frequency blocks in elastic optical networks. Background technique [0002] With the rapid development of cloud computing, big data, artificial intelligence, mobile Internet and other technologies, application scenarios have higher and higher requirements for network bandwidth, and the bandwidth requirements of different applications are also more and more different. Traditional WDM-based The optical network of the (Wavelength Division Multiplexing, WDM) technology can only provide wavelength channels with a fixed spectrum, and cannot meet the differences in bandwidth requirements of applications. Elastic Optical Network (EON) technology is based on Optical Orthogonal Frequency Division Multiplexing (O-OFDM) technology, which can flexibly allocate spectrum resources a...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the technical problem that the existing passive multi-stream spectrum allocation method in the elastic optical network cannot effectively utilize spectrum resources, the present invention proposes an active multi-stream spectrum allocation method based on index-divided frequency blocks in the elastic optical network, which can more effectively Use spectrum resources to greatly reduce the blocking rate of connection requests

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