An elastic optical network spectrum allocation method based on multi-hop routing

Abstract

The invention discloses an elastic optical network spectrum allocation method based on multi-hop routing, and belongs to the technical field of elastic optical network and spectrum resource allocation. The method comprises the following steps: establishing a hop count threshold model of a multi-hop route under the upper limit of energy consumption, selecting a group of intermediate multi-hop nodesas virtual routes, carrying out spectrum allocation on services, and the like. According to the method, firstly, an intermediate multi-hop node threshold value is calculated under the constraint of energy consumption, then, an intermediate multi-hop routing node is reasonably selected, the modulation format grade of each section of short optical path is flexibly selected between source sink nodesaccording to the transmission distance, spectrum resource distribution is optimized, and the purpose of improving the overall resource utilization rate of the network is achieved under the constraintof energy consumption.

Description

technical field [0001] The invention relates to the technical field of elastic optical network and spectrum resource allocation, in particular to a method for allocating spectrum of elastic optical network based on multi-hop routing. Background technique [0002] In order to improve the spectrum resource utilization of Elastic Optical Networks (EONs), many researchers have applied Distance Adaptive Modulation (DAM) technology to Elastic Optical Networks to solve routing and spectrum allocation (Routing and Spectrum Allocation). Spectrum assignment, RSA) problem. However, in EONs, the constraints of spectrum continuity and adjacency must be followed, that is, service requests must occupy the same amount of spectrum resources at the same position on all links on the optical path between source and sink nodes, so the dynamic establishment and removal of a large number of service requests will inevitably cause The problem of spectrum fragmentation in the network makes it diffic...

AI Technical Summary

Problems solved by technology

The impacts of multi-hop nodes are energy consumption and delay, and the delay is very small, which can be accepted by the project. However, due to the need for optical-electrical-optical conversion and the change of modulation format of multi-hop nodes , so that the whole process will increase more energy consumption

[0005] In short, although the multi-hop algorithm proposed in the above research improves the spectrum utilization to a certain extent, it also leads to the increase of network energy consumption.

The energy consumption growth of this core network may exceed the energy consumption of the access network in the future and become the main body of Internet energy consumption.

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