Spectrum allocation method based on spectrum resource prime number division in elastic optical network

Abstract

The invention provides a spectrum allocation method based on spectrum resource prime number division in an elastic optical network, which comprises the following steps: dividing spectrum resources on each link in the network into K types of prime number blocks, wherein the number of frequency pieces contained in different types of prime number blocks is different; when the number of the frequency chips required by one connection request is integer multiples of a certain prime number block in the K types, distributing the prime number blocks of the corresponding types; otherwise, adding one frequency sheet to the number of frequency sheets required by the connection request to enable the number of frequency sheets to be integral multiples of a certain prime number block in the K types, and then distributing the prime number blocks of the corresponding types. According to the method, the spectrum resources are divided into the prime number blocks, so that the spectrum resources on different links are arranged more orderly, multiple types of connection requests are allowed to share one type of prime number blocks, the types of prime number blocks needing to be divided are reduced, and finally, the effects of increasing spectrum availability and reducing the blocking rate of the connection requests are achieved.

Description

technical field [0001] The invention belongs to the technical field of optical networks, and in particular relates to a spectrum allocation method based on prime number division of spectrum resources in an elastic optical network. Background technique [0002] With the rapid development of technologies such as 5G mobile communications and edge-cloud collaborative computing, application scenarios have higher and higher requirements for network bandwidth, and at the same time, the bandwidth requirements of different application scenarios are more and more different. Traditional optical networks are based on wavelength division multiplexing technology, which can only provide fixed-bandwidth transmission channels for applications, so they cannot meet the different bandwidth requirements of different applications. Elastic Optical Network (EON) is based on optical orthogonal frequency division multiplexing technology. It can use bandwidth-adjustable optical transponders, bandwidth...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the technical problem of fragmentation of spectrum resources caused by the irregular arrangement of idle frequency slices on different existing links, the present invention proposes a spectrum allocation method based on prime number division of spectrum resources in an elastic optical network. Divide it into different types of prime blocks, and then allocate one or more prime blocks of corresponding types according to the number of frequency slices required by each connection request; the present invention reasonably arranges the spectrum resources used by the connection request from a global perspective , so that the idle frequency slices are more neatly aligned on different links, thereby reducing the fragmentation of spectrum resources, thereby reducing the blocking rate of connection requests

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