Spectrum Allocation Method Based on Hybrid Spectrum Switching Resource Pool in Elastic Optical Network

Abstract

The invention claims to protect a spectrum allocation method based on a mixed spectrum conversion resource pool in an elastic optical network, which belongs to the technical field of communication networks. Aiming at the allocation and optimization of spectrum resources in elastic optical networks, this method proposes a spectrum allocation method based on a hybrid spectrum conversion resource pool of full-range and limited-range spectrum converters, which allocates spectrum for service requests and establishes connections. The present invention first calculates the longest continuous spectrum segment set sequentially on the service route, and then according to the spectrum conversion relationship in the adjacent spectrum segment set, preferentially uses a limited-range spectrum converter to relax the spectrum continuity constraint and calculates all feasible optical paths, and finally according to The principle of low-frequency continuous spectrum segment priority determines the only optical path and allocates the corresponding spectrum and spectrum converter. The invention can effectively reduce the use of the full-range spectrum converter in the network on the basis of maintaining a low service blocking rate, thereby reducing the configuration cost of network hardware resources.

Description

technical field [0001] The invention belongs to the technical field of communication network. In particular, it relates to a spectrum allocation method based on a hybrid spectrum conversion resource pool in an elastic optical network. Background technique [0002] With the continuous development of Internet technology and the continuous emergence of new network applications, the service traffic in the communication network has shown explosive growth, which poses a huge challenge to the transmission capacity and hardware resource allocation in the backbone optical network. Compared with the traditional WDM optical network, the elastic optical network based on Orthogonal Frequency Division Multiplexing (OFDM) technology has a more efficient spectrum resource utilization due to its dense carrier frequency slots, elastic bandwidth granularity, and flexible modulation methods , which has great application prospects. [0003] However, in an elastic optical network, due to the in...

AI Technical Summary

Problems solved by technology

At present, spectrum allocation methods for all-optical networks based on spectrum converters mainly use network node configuration schemes of purely full-range spectrum converters or purely limited-range spectrum converters. The former relies too much on full-range spectrum converters and is difficult to effectively control The cost of network hardware resources, while the latter reduces the flexibility of switching node spectrum allocation, which is likely to cause a high service blocking rate

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