Spectrum resource assignment method and device

Abstract

The invention discloses a spectrum resource assignment method, which comprises the following steps of: classifying a network service, correspondingly blocking a spectrum space, determining corresponding relationships between network service classes and spectrum blocks, and when spectrum resources are required to be assigned to the network service, determining the network service class of the network service; determining a spectrum block corresponding to the network service class according to the corresponding relationships between the network service classes and the spectrum blocks; and assigning spectrum resources in the spectrum block to the network service. The invention correspondingly discloses a spectrum resource assignment device. The spectrum resources are assigned on the basis of the network service class; and for different network scenarios, different spectrum resource assignment methods can be instantiated, the spectrum space is correspondingly blocked, services of the same class are assigned to the same spectrum block, and then the spectrum space released by the services of the same class can be well utilized by subsequent services, so that spectrum fragments can be reduced, and the utilization rate of the spectrum resources can be increased.

Description

technical field [0001] The invention relates to the field of spectrum flexible optical networks, in particular to a method and device for allocating spectrum resources. Background technique [0002] In optical networks, more traditional spectrum allocation methods include random assignment (Random Assignment) method and first hit (FF first-fit) method, where: [0003] When using the random allocation method to allocate spectrum for network services, first search in the spectrum space and give a set of all available spectrum segments, and then randomly select a section of spectrum from all available spectrum segments to allocate to the corresponding network services, for example, using random allocation method, the occupancy of spectrum space can be as follows figure 1 shown; [0004] When using the first-hit method to allocate spectrum for network services, all available spectrum segments are first numbered, and when searching for available spectrum segments, the spectrum ...

AI Technical Summary

Problems solved by technology

Specifically, in a spectrum flexible optical network, when each service arrives, the random allocation method is used to randomly allocate available spectrum segments, which will disperse the occupied spectrum segments and easily generate spectrum fragments; while the first hit method makes all the spectrum in use The segment should be located at the low end of the spectrum space as much as possible, but because the service time of different network services is inconsistent, after the resources occupied by the network services that have completed the service are released, the spectrum bandwidth required by the next service requesting resources may also be inconsistent. , the use of the first hit method still has the problem that the occupied spectrum segments are scattered and spectrum fragments are prone to occur

[0006] In short, different network services have different network service characteristics, and the above-mentioned existing spectrum resource allocation methods are mixed allocation for all network services, so it is easy to generate a large number of spectrum fragments, which will reduce the utilization of spectrum resources

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