Spectrum allocation method and system

Abstract

The invention provides a spectrum allocation method and system. The spectrum allocation method comprises the steps of: based on a source node and sink nodes of services, constructing a small-particle-size service group; constructing a continuous spectrum plane for the small-particle-size service group; and according to the continuous spectrum plane, allocating spectrum resources. According to theinvention, the small-particle-size service group is constructed by carrying out classification on the services, the services with path similarity are partitioned into the same group to be subjected touniform routing and spectrum allocation so as to reduce complexity of service bearing, and continuous spectrum allocation is carried out on the basis of the small-particle-size service group so as toeffectively reduce generation of spectrum fragments and improve spectrum availability of an elastic optical network.

Description

technical field [0001] The invention relates to the field of elastic optical networks, in particular to a frequency spectrum allocation method. Background technique [0002] Today, with the rapid development of society, industries such as the Internet, cloud computing, and big data have developed rapidly. Elastic Optical Network (EON), because it supports non-blocking cross-connection and add / drop of optical nodes, And the bandwidth of each optical path can be adaptively matched according to the transmission rate of the service, which will gradually become the mainstream transmission system of the next generation optical network. As the most basic bearer network, elastic optical network is widely used in data center networking, air-space-ground integrated networking, mobile Internet and other fields. Compared with the traditional fixed-grid optical network, the elastic optical network can perform adaptive spectrum allocation according to the service rate, which greatly impr...

AI Technical Summary

Problems solved by technology

However, with the continuous emergence of emerging services such as big data and cloud computing, the services carried by elastic optical networks are characterized by multiple types, multiple rates, and multiple constraints, which greatly increases the complexity of service carrying.

[0003] Moreover, with the dynamic demolition and construction of a large number of small-grained services, a large number of spectrum fragments will be generated in the elastic optical network

Under the constraints of spectrum continuity and spectrum consistency for end-to-end services, a large number of spectrum fragments in the network will reduce the availability of spectrum resources and cause a high blocking rate

At the same time, since each optical path consumes an optical transmitter and optical receiver, establishing an end-to-end optical path for each small-grained service will increase the cost of the network

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