Research on Service Aware Shared Link Protection Strategy

WEI Yong; WANG Xu-rui; ZHAO Wei; MENG Xian; YUAN Xin-yu

doi:10.13756/j.gtxyj.2021.03.003

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Research on Service Aware Shared Link Protection Strategy

- Research on Service Aware Shared Link Protection Strategy
- Study on Optical Communications Issue 3, Pages: 11-15(2021)
- 作者机构：
  
  1.国网河北省电力有限公司　信息通信分公司，石家庄　050021
  2.天津大学，天津　300072
- 作者简介：
- 基金信息：
- DOI：10.13756/j.gtxyj.2021.03.003
  CLC： TM77; TN253
- Published：10 June 2021，
  
  Received：09 October 2020，
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WEI Yong, WANG Xu-rui, ZHAO Wei, et al. Research on Service Aware Shared Link Protection Strategy. [J]. Study on Optical Communications (3):11-15(2021)
DOI：

WEI Yong, WANG Xu-rui, ZHAO Wei, et al. Research on Service Aware Shared Link Protection Strategy. [J]. Study on Optical Communications (3):11-15(2021) DOI： 10.13756/j.gtxyj.2021.03.003.

摘要

针对传统弹性光网络采用专用路径1+1保护策略存在资源浪费的问题，文章提出了一种共享链路保护策略。在检测到链路故障后，柔性光转发器切换至共享保护链路，并根据业务的优先级和请求频率重排业务权重，依据业务权重提供差异化的路由和频谱分配。此外，文章提出一种以物理网络拓扑结构、业务需求集合和优质业务量占比为约束条件，以最小化频谱隙利用率为目标，具有业务区分的路由和频谱分配方法。理论分析和仿真结果表明，与传统的1+1保护方法相比，所提保护策略在降低网络拥塞率的同时，可以最多节省38%的频谱资源，能够最大限度地实现备份频谱资源的共享。

Abstract

There is a problem of waste of resources in the dedicated path 1+1 protection strategy in the traditional optical network. In this paper

a priority shared link protection strategy is proposed. After detecting the link failure

the flexible optical transponder switches to the shared protection link

and rearranges the service weight according to the priority of the service and the requested frequency

and provides differentiated spectrum slot allocation according to the service weight. In addition

this paper proposes an optimal routing and spectrum allocation method that considering the physical network topology

the set of service requirements

and the proportion of high-quality services as constraints

and considering the minimization of the utilization of spectrum slots as the goal. The theoretical analysis and simulation results show that compared with the traditional 1+1 protection method

the proposed protection strategy can save up to 38%of the spectrum resources while reducing the network congestion rate

and maximizing the sharing of backup spectrum resources.

关键词

弹性光网络专用保护业务感知整数线性规划

Keywords

elastic optical networkdedicated protectionservice awarenessinteger linear programming

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