Impairment-Aware Resource Optimization Method with Dedicated Path Protection in C+L Band Optical Networks

YANG Shiqi; ZHU Changyin; WANG Xiaoling; SHAO Weidong; LI Fan; CHEN Bowen

doi:10.13756/j.gtxyj.2025.250307

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Impairment-Aware Resource Optimization Method with Dedicated Path Protection in C+L Band Optical Networks

更新时间：2025-12-25

- Impairment-Aware Resource Optimization Method with Dedicated Path Protection in C+L Band Optical Networks
- Study on Optical Communications Issue 6, (2025)
- 作者机构：
  
  1.苏州大学　电子信息学院，江苏　苏州　215006
  2.中通服网盈科技有限公司，南京　210019
- 作者简介：
- 基金信息：
- DOI：10.13756/j.gtxyj.2025.250307
  CLC： TN915
- Received：20 September 2025，
  
  Revised：2025-10-20，
  
  Published：10 December 2025
- 稿件说明：
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杨仕奇，朱长银，王晓玲，等. 损伤感知的C+L波段光网络专用保护资源优化方法[J]. 光通信研究，2025(6): 250307.

Yang S Q, Zhu C Y, Wang X L, et al. Impairment-Aware Resource Optimization Method with Dedicated Path Protection in C+ L Band Optical Networks[J]. Study on Optical Communications, 2025(6): 250307.
杨仕奇，朱长银，王晓玲，等. 损伤感知的C+L波段光网络专用保护资源优化方法[J]. 光通信研究，2025(6): 250307. DOI： 10.13756/j.gtxyj.2025.250307.

Yang S Q, Zhu C Y, Wang X L, et al. Impairment-Aware Resource Optimization Method with Dedicated Path Protection in C+ L Band Optical Networks[J]. Study on Optical Communications, 2025(6): 250307. DOI： 10.13756/j.gtxyj.2025.250307.

摘要

【目的】

随着人工智能（AI）技术的不断发展，AI催生的各种应用方兴未艾，网络的带宽资源已经逐渐满足不了业务增长的需求，拓宽频谱是容量演进的一个重要方向。而引入C+L波段光网络能够有效解决光网络的带宽容量问题。

【方法】

为了有效降低网络的阻塞率和保障光网络的生存性，考虑C和L波段频谱资源分配造成的影响，采用不同工作路径和保护路径的路径选择方式、不同频谱资源的分配方式和不同调制格式的选择方式，文章提出了C+L多波段弹性光网络的损伤感知专用保护频谱分配方法（IASADP）。为了方便比较，引入了

条最短路径首次命中专用保护方法（KSPFFDP）、基于信噪比再验证专用保护方法（RSNRDP）、基于最大化信噪比专用保护方法（MSNRDP）3种方法作为对比，分析了在不同网络负载下各个方法的网络阻塞率和频谱利用率。

【结果】

仿真结果表明，与KSPFFDP、RSNRDP和MSNRDP相比，文章所提方法能明显降低网络的阻塞率，提高资源利用效率，解决了光网络的传输质量问题。

【结论】

因此，通过IASADP可实现C+L波段光网络频谱资源优化的目标。

Abstract

【Objective】

With the continuous development of Artificial Intelligence (AI)

a wide range of AI-driven applications is rapidly emerging. The growing service requirements have progressively surpassed the capacity of the existing network bandwidth resources

thus making spectrum expansion an essential avenue for capacity enhancement. Therefore

introducing C+L band optical networks can effectively address the problem of limited bandwidth capacity.

【Methods】

To reduce blocking probability and ensure network survivability

this paper considers the impact of spectrum allocation on both the C and L bands

employing different strategies for the selection of the working path and protection path

spectrum resource assignment

and modulation format selection. We propose an Impairment-Aware Spectrum Allocation method with Dedicated Protection (IASADP) in C+L band elastic optical networks. For comparison

three dedicated protection strategies are introduced: the

th Shortest-Path First-Fit with Dedicated Protection method (KSPFFDP)

Revalidated Signal-to-Noise Ratio with Dedicated Protection method (RSNRDP)

and Maximize Signal-to-Noise Ratio with Dedicated Protection method (MSNRDP). The performance of these methods is analyzed under different network loads in terms of blocking probability and spectrum utilization.

【Results】

Simulation results show that

compared with KSPFFDP

RSNRDP

and MSNRDP

the proposed method significantly reduces the blocking probability

improves the spectrum utilization

and achieves higher transmission quality.

【Conclusion】

Therefore

the IASADP effectively achieves the goal of optimizing spectrum resources in C+L band optical networks.

关键词

Keywords

references

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