A Hybrid Dedicated Path Protection Strategy in EONs

ZHANG Sheng-feng; YUAN Qiang; CHEN Hui-dan; HUANG Sheng

doi:10.13756/j.gtxyj.2021.02.004

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A Hybrid Dedicated Path Protection Strategy in EONs

- A Hybrid Dedicated Path Protection Strategy in EONs
- Study on Optical Communications Issue 2, Pages: 20-25(2021)
- 作者机构：
  
  重庆邮电大学通信与信息工程学院，重庆　400065
- 作者简介：
- 基金信息：
- DOI：10.13756/j.gtxyj.2021.02.004
  CLC： TN915
- Published：10 April 2021，
  
  Received：15 October 2020，
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ZHANG Sheng-feng, YUAN Qiang, CHEN Hui-dan, et al. A Hybrid Dedicated Path Protection Strategy in EONs. [J]. Study on Optical Communications (2):20-25(2021)
DOI：

ZHANG Sheng-feng, YUAN Qiang, CHEN Hui-dan, et al. A Hybrid Dedicated Path Protection Strategy in EONs. [J]. Study on Optical Communications (2):20-25(2021) DOI： 10.13756/j.gtxyj.2021.02.004.

摘要

为了降低带宽阻塞率，节约频谱资源，在动态业务到达的弹性光网络（EONs）场景下，不同业务请求的路径状况可能不同，因此不能确定单路径专有保护与带宽分割多路径专有保护的优劣。文章结合单路径专有保护和带宽分割多路径专有保护提出了一种混合路径专有保护（HDPP）算法。该算法利用路径的单位频谱效率和路径跳数计算了

条链路不相关候选路径，并提出了一种考虑单位频隙最高频谱效率和路径跳数以及路径上最大可用频谱信息的多路径频谱分配（MPSA）算法，最后，HDPP算法在多种生存性方案中选择出最佳方案。仿真结果表明，与对比算法相比，所提算法在阻塞率和频谱利用率方面都有较好的性能表现。

Abstract

In order to reduce the bandwidth blocking rate and the consumption of spectrum resources in dynamic networks

the path conditions of different service requests may be different. Therefore

it is impossible to determine the advantages and dis-advantages of single-path dedicated protection and partitioning dedicated path protection. In this paper

a Hybrid Dedicated Path Protection (HDPP) routing spectrum allocation strategy is proposed by combining single-path dedicated protection and partitioning dedicated path protection. This strategy considers the distance adaptive modulation and the number of path hops pre-calculated

link disjoint candidate paths. We also propose a Multiple Path Spectrum Assignment (MPSA) strategy that considers the highest spectrum efficiency per unit frequency slot with the number of path hops and the maximum available spectrum information on the path.HDPP selects the best scheme among multiple survivability routing spectrum allocation schemes. The simulation results show that the proposed algorithm has better performance in terms of blocking rate and spectrum utilization compared with other algorithms.

关键词

弹性光网络路由和频谱分配路径保护带宽阻塞率频谱利用率

Keywords

EONsrouting and spectrum assignmentpath protectionbandwidth blocking ratespectrum utilization

references

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