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Method and device for spectrum allocation in spectral flexible optical network

A spectrum allocation and optical network technology, applied in the field of spectrum flexible optical network, can solve problems such as blocked connection requests and inability to allocate large enough spectrum blocks, and achieve the effect of reducing blocking rate and spectrum fragmentation

Active Publication Date: 2014-12-10
BEIJING UNIV OF POSTS & TELECOMM
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The existence of these spectrum fragments makes the network unable to allocate a large enough spectrum block for subsequent connection requests, thus blocking connection requests

Method used

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  • Method and device for spectrum allocation in spectral flexible optical network
  • Method and device for spectrum allocation in spectral flexible optical network
  • Method and device for spectrum allocation in spectral flexible optical network

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Embodiment

[0054] The present invention is described below with a specific embodiment, but the protection scope of the present invention is not limited. In this embodiment, spectrum allocation is realized through a two-dimensional spectrum space. The spectrum flexible optical network is set as shown in FIG.

[0055] The two-dimensional spectrum space refers to the two-dimensional spectrum resource space formed by the link space (the first dimension) and the spectrum slot space (the second dimension) in the spectrum flexible optical network. Because the spectrum slot width and spectrum range of any link are the same, if the spectrum resource of the whole network is represented by the spectrum slot as a unit, it can be expressed as a two-dimensional spectrum space, as shown in Figure 2(b). Assuming that there are four kinds of services in the spectrum flexible optical network, they are 10Gb / s, 40Gb / s, 100Gb / s and 400Gb / s respectively, and the required spectrum bandwidths correspond to 25GH...

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Abstract

The invention discloses a method and a device for spectrum allocation in a spectral flexible optical network and relates to the technical field of the spectral flexible optical networks. According to the method and the device for spectrum allocation in the spectral flexible optical network, operations, topologies and spectral gaps all classified, and then the spectral gaps are selected by use of the corresponding topologies according to the types of the operations; as a result, the regularization of spectrum occupation is realized, spectrum fragments are reduced and the congestion probability is reduced.

Description

technical field [0001] The present invention relates to the technical field of spectrum flexible optical network, in particular to a spectrum allocation method and device in spectrum flexible optical network. Background technique [0002] The spectrum flexible optical network brings many new requirements to the upper layer control and management while obtaining efficient spectrum efficiency and flexibility, such as adaptive spectrum allocation scheme, multi-service adaptive rate scheme, etc. Among them, the problem of routing and spectrum allocation, that is, establishing an end-to-end optical path and assigning appropriate communication parameters to it in an adaptive manner to service bandwidth requirements, is the core issue of network management and control. The existing research results can be roughly divided into three categories: static routing and spectrum allocation planning, quasi-static routing and spectrum resource evaluation, dynamic path establishment and spect...

Claims

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Application Information

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IPC IPC(8): H04L12/911H04L12/801H04Q11/00
Inventor 赵永利杨辉高冠军师亚超张杰
Owner BEIJING UNIV OF POSTS & TELECOMM
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