Routing and spectrum distribution method in elastic optical network

Abstract

The invention provides a routing and spectrum distribution method in an elastic optical network. The method comprises the following steps: generating candidate route sets for multiple connection requests; traversing the candidate route sets, selecting the route set occupying the least total frequency slot amount as a work route set; and distributing the frequency slot for the work route set. By using the method provided by the invention, the total frequency slot amount occupied by multiple requests is used as the basis for selecting the work route set, and the spectrum efficiency is improved from the overall perspective; when the bandwidth of the connection request is changed, the work route can be dynamically changed according to the method disclosed by the invention, and the compatibility of the route and the spectrum is improved.

Description

technical field [0001] The invention relates to the technical field of optical communication, in particular to a routing selection and frequency spectrum allocation method for an elastic optical network. Background technique [0002] With the rapid development of broadband services, data centers, and cloud computing services, elastic optical networks are gradually replacing the commonly used wavelength division multiplexing networks with their efficient spectrum utilization to cope with the pressure brought by the explosive growth of service traffic. [0003] Compared with the fixed spectrum grid resource allocation method adopted in the wavelength division multiplexing network, the elastic optical network is based on the optical orthogonal frequency division multiplexing (Optical Orthogonal Frequency Division Multiplex, O-OFDM) multi-carrier modulation technology, and the spectrum resources can be cut However, this also makes the problem of routing selection and spectrum al...

AI Technical Summary

Problems solved by technology

[0003] Compared with the fixed spectrum grid resource allocation method adopted in the wavelength division multiplexing network, the elastic optical network is based on the optical orthogonal frequency division multiplexing (Optical Orthogonal Frequency Division Multiplex, O-OFDM) multi-carrier modulation technology, and the spectrum resources can be cut However, this also makes the problem of routing selection and spectrum allocation in the elastic optical network more complicated. How to select the appropriate path and allocate the frequency spectrum according to the current broadband request Gap to improve spectrum resource utilization is the key research content of elastic optical network

[0004] In the existing technology, usually the shortest path or the path with the most available frequency slots is simply selected. This method does not comprehensively consider routing and spectrum adaptation from a global perspective, resulting in low spectrum utilization.

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