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Frequency spectrum resource distribution method in elastic optical network and system thereof

A spectrum resource allocation and elastic optical network technology, applied in the field of optical network communication, can solve problems such as increasing the bit error rate, and achieve the effect of saving spectrum

Inactive Publication Date: 2014-07-30
BEIJING UNIV OF POSTS & TELECOMM
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  • Abstract
  • Description
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Problems solved by technology

[0006] The technical problem to be solved by the present invention is: how to solve the problem of increasing the bit error rate caused by saving frequency spectrum

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  • Frequency spectrum resource distribution method in elastic optical network and system thereof
  • Frequency spectrum resource distribution method in elastic optical network and system thereof
  • Frequency spectrum resource distribution method in elastic optical network and system thereof

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Embodiment Construction

[0035] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0036] image 3 It is a flowchart of a method for allocating spectrum resources in an elastic optical network according to an embodiment of the present invention. The method of this embodiment includes the following steps:

[0037] S1: When the client request arrives, select an optical path with the most available frequency slots from the candidate optical paths, the candidate optical path is calculated and obtained according to the path selection unit (Path Computation Element, PCE);

[0038] S2: If the bit error rate requested by the client (that is, "BER" in the figure) is less than the preset bit error rate threshold (that is, "TH1" in the figure), select a low-order ...

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Abstract

The invention, which relates to a optical network communication technology field, discloses a frequency spectrum resource distribution method in an elastic optical network and a system thereof. The method comprises the following steps: S1. when a client request arrives, selecting one optical path with maximum available frequency gaps from candidate optical paths; S2. if a bit error rate needed by the client request is less than a preset bit error rate threshold, selecting a low order modulation mode, otherwise executing a step S3; S3. if a hop count of the optical path exceeds a preset hop count threshold, selecting a low order modulation mode, otherwise selecting a high order modulation mode; S4. determining whether there are enough continuous available frequency gaps, if there are enough continuous available frequency gaps, executing a step S5, otherwise obstruct; S5. selecting the frequency gap from a minimum label and establishing the optical path according to the selected modulation mode. According to the invention, during the frequency spectrum resource distribution, an error rate requirement and the hop count are considered. When the resources are sufficient, the information transmission quality requirement can be considered too. The frequency spectrum can be saved and the bit error rate is not increased.

Description

technical field [0001] The invention relates to the technical field of optical network communication, in particular to a spectrum resource allocation method and system in an elastic optical network. Background technique [0002] Although the traditional wavelength routing wavelength division multiplexing (Wavelength Division Multiplexing, WDM) optical network has many advantages, its resource allocation granularity (the minimum unit is one wavelength) is too large, resulting in insufficient resource utilization. The concept of spectrum-sliced ​​elastic optical path network SLICE (spectrum-sliced ​​elastic optical path network) is proposed: according to the data rate requested by the user, spectrum resources of an appropriate size rather than a fixed size are allocated to the end-to-end optical path. In SLICE, the wavelength consistency constraint is converted into a spectrum consistency constraint. After the spectrum resources of each link are fragmented (divided into freque...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04J14/02
Inventor 张民王磊张力方丁慧陈馨陈雪
Owner BEIJING UNIV OF POSTS & TELECOMM
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