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Routing calculation, core selection, spectrum allocation method and system based on cross-talk perception

A spectrum allocation and fiber core technology, applied in the field of communication networks, can solve problems affecting the transmission performance of multi-core spectrum flexible optical networks

Active Publication Date: 2018-11-16
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the crosstalk between the cores is not handled properly, it will seriously affect the transmission performance of connection requests in the multi-core spectrum flexible optical network

Method used

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  • Routing calculation, core selection, spectrum allocation method and system based on cross-talk perception
  • Routing calculation, core selection, spectrum allocation method and system based on cross-talk perception
  • Routing calculation, core selection, spectrum allocation method and system based on cross-talk perception

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Experimental program
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Effect test

Embodiment 1

[0062] In this embodiment, the routing calculation, fiber core selection, and spectrum allocation methods based on crosstalk perception include:

[0063] S1 multi-fiber spectrum flexible optical network initialization. In Spectrum Flexible Optical Network G s =(L, N, C, F), where L represents a group of optical fiber links, N represents a group of optical handover nodes, C represents the core of a group of optical fiber links, F={F 0 , F 1 , F 2 ,...,F j ,...,F |F|-1} represents the set of states for available spectrum slots. When the number is F j When the spectral gap is occupied, F j =1; when the number is F j When the spectrum gap is free, F j =0. FM={0,1,2,...,j,...,|F|-1} represents a numbered set of available spectrum slots. (P, Q) ∈ L represents an optical fiber link from an optical switching node P to an optical switching node Q, where P, Q ∈ N. Set the maximum crosstalk threshold A of the fiber link max .

[0064] S2 sets the priority of each fiber core...

Embodiment 2

[0082] This embodiment is based on the routing calculation, fiber core selection, and spectrum allocation methods based on crosstalk perception. On the basis of Embodiment 1, it also includes establishing this group of connection requests, and evaluating the use status of the entire network spectrum resources and the blocking situation of connection requests.

Embodiment 3

[0084] This embodiment is based on a routing calculation, fiber core selection, and spectrum allocation system based on crosstalk perception, and is designed to implement the methods described in Embodiments 1 and 2 above, including:

[0085] Initialization Module: In Multi-Fiber Spectrum Flexible Optical Network G s =(L, N, C, F), set the topology information, fiber connection status, network switching node number, fiber link number, fiber core number of each fiber, and each fiber chain The number of spectrum slots of the path, the bandwidth of each spectrum slot, and the maximum crosstalk threshold A of the optical fiber link max .

[0086] Fiber core priority setting module: set the priority of each fiber core in the multi-core optical fiber, and minimize the connection request in adjacent cores with the same bandwidth, which is beneficial to reduce the impact of crosstalk.

[0087] Fiber core classification module: When the connection request arrives, it will classify th...

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Abstract

The invention relates to a routing calculation, core selection, spectrum allocation method and system based on cross-talk perception, which are designed to solve the cross-talk problem of adjacent cores in a multi-core optical network. The routing calculation, core selection, spectrum allocation method based on cross-talk perception includes the following steps: calculating the working path for each connection request, and carrying out core selection according to the connection request classification principle; searching for and allocating spectrum resources on the working paths of the connection requests according to the constraints of spectrum continuity and spectrum consistency and the -talk threshold constraints, and establishing connection requests in a spectrum flexible optical network; and calculating the spectrum utilization rate and connection request blocking rate of the network according to the status of spectrum resource occupied by each fiber link. According to the invention, the cross-talk value of connection requests is reduced, the network spectrum resources are made more regular, and thus, the efficiency of the network spectrum resources is improved.

Description

technical field [0001] The invention belongs to the technical field of communication networks, and in particular relates to a method and system for routing calculation, fiber core selection, and frequency spectrum allocation based on crosstalk perception. Background technique [0002] With the rapid development of technologies such as big data, cloud services, and virtual reality, network bandwidth traffic has shown explosive growth, and the demand for network business service quality has increased significantly. Because traditional optical networks are laid with single-core optical fibers, the traditional single-core optical network can no longer meet the bandwidth requirements of connection requests, which poses great challenges to optical network operations. There is an urgent need to improve the capacity of the optical network. [0003] Multi-core fiber is one of the effective means to solve this problem. Compared with single-core optical network, multi-fiber optical n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04Q11/00H04L12/721H04L12/733H04L45/122
CPCH04L45/123H04L45/20H04Q11/0005H04Q11/0062H04Q2011/0073H04Q2011/0086H04Q2011/0084
Inventor 陈伯文朱青橙王婷高立杭朱磊吕露露
Owner SUZHOU UNIV
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