Novel node upgradation strategy for migration to elastic optical networks

Xiaodong FU; Yongcheng LI; Gangxiang SHEN

doi:10.11959/j.issn.1000-436x.2018158

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Novel node upgradation strategy for migration to elastic optical networks

Optical Transmission System and Optical Network Optimization | 更新时间：2024-06-05

- Novel node upgradation strategy for migration to elastic optical networks
- Journal on Communications Vol. 39, Issue 9, Pages: 76-83(2018)
- 作者机构：
  
  1. 苏州大学电子信息学院，江苏苏州 215006
  2. 中天宽带技术有限公司，江苏南通 226000
- 作者简介：
- 基金信息：
  
  The National Natural Science Foundation of China(61671313);The National Natural Science Foundation of China(61801320);The Science and Technology Achievement Transformation Project of Jiangsu Province(BA2016123)
- DOI：10.11959/j.issn.1000-436x.2018158
  CLC： TN915.02
- Online First：2018-09，
  
  Published：25 September 2018
- 稿件说明：
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Xiaodong FU, Yongcheng LI, Gangxiang SHEN. Novel node upgradation strategy for migration to elastic optical networks[J]. Journal on Communications, 2018, 39(9): 76-83.
DOI：

Xiaodong FU, Yongcheng LI, Gangxiang SHEN. Novel node upgradation strategy for migration to elastic optical networks[J]. Journal on Communications, 2018, 39(9): 76-83. DOI： 10.11959/j.issn.1000-436x.2018158.

摘要

在波分复用光网络向弹性光网络演进过程中，需要将传统的光节点升级为支持无栅格特性的新型可重构光分插复用器（ROADM）。然而，对于一个大型网络来说，其节点不可能一次性全部升级，而是存在一个逐步升级的过程。针对该问题，重点研究了升级光节点的选择策略，并采用频域子波段虚级联技术实现不同代ROADM节点间的互通互联。同时，通过建立整数线性规划（ILP）优化模型和提出高效的启发式算法来完成对这些升级节点的选择。仿真结果表明，提出的升级光节点选择策略十分有效，可达到与ILP优化模型接近的网络频谱使用效率。

Abstract

For migration from dense wavelength division multiplexing (DWDM) networks to elastic optical networks (EON)

it is required to upgrade the traditional reconfigurable optical add-drop multiplexer (ROADM) to the new-generation ROADM that supports flexible grids.However

for a large-scale optical network

it is generally impossible to upgrade the ROADM nodes all in once; rather

they would be upgraded gradually.For this

it is critical to study different strategies for selecting the ROADM nodes to be upgraded.Also

for the interconnection between different generations of ROADM

the sub-band virtual concatenation (VCAT) technique was employed to enable an optical channel to be established via traversing different types of nodes.An integer liner programming (ILP) model and an efficient heuristic algorithm were developed to jointly select the ROADM nodes to upgraded and assign spectrum resources.Simulation studies show that the proposed strategy for the upgraded node selection is efficient to perform close to the ILP model in terms of the maximum number of FS used in the whole network.

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