Routing method suitable for frequency spectrum-flexible optical network

Abstract

A routing method suitable for a frequency spectrum-flexible optical network includes the steps of: a. performing initialization configuration on a network; b. waiting for a service request to start; c. analyzing the type of the received service request, if the service request is a connection establishing request, entering the Step d, and if the service request is a connection releasing request, entering the Step h; d. starting route selection; e. judging whether a routing result is successful, if yes, entering the Step f, otherwise, entering the Step g; f. allocating frequency spectrum resources; g. searching a service chain table, and defining a process event of a next connection request; and h. releasing resources, and returning to the Step b. According to the routing method, in the routing process, selection and reforming of the frequency spectrum resources are performed, and allocation of the frequency spectrum resources is performed at the same time. The method adopts a heuristic algorithm, and has better flexibility than a traditional ILP method, does not need a central computational node, does not need global information, can completely adopt a distributed method to process, and is suitable for application to a large-scale network.

Description

technical field [0001] The invention relates to a backup routing selection method suitable for spectrum flexible optical networks, belonging to the technical field of communication. Background technique [0002] As the service rate level and service granularity in the optical network gradually increase, the traditional network based on fixed wavelength and fixed time slot can no longer meet the demand for explosive growth of services. The flexible optical network is positioned to improve the resource utilization efficiency of the network to adapt to new service access. However, due to the dynamic demolition and construction of services and the lack of reasonable planning for the allocation of service bandwidth, a large number of scattered fragments are formed during the operation of the network, which affects the rapid access of subsequent large-capacity services. When performing service routing, it is necessary to consider possible fragmentation risks, reasonably plan serv...

AI Technical Summary

Problems solved by technology

At present, there are more considerations in the planning and design of service routes, but less consideration is given to the resource integration of backup routes. As a result, large-capacity services cannot be quickly restored when a failure occurs, and the spectrum resources of backup routes need to be integrated in advance. , wasting valuable business recovery time

Considering that work routing can be designed online through a centralized netwo...

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