Blocking aware offline survivable path provisioning of connection requests in elastic optical networks

IF 0.6 Q4 COMPUTER SCIENCE, THEORY & METHODS International Journal of Parallel Emergent and Distributed Systems Pub Date : 2023-09-29 DOI:10.1080/17445760.2023.2263142

Shibsankar Bala, Somesh Gorai, Pradyut Sarkar, Monish Chatterjee

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Abstract

AbstractSurvivability of Elastic Optical Networks (EONs) from a link failure is an important problem. Shared Backup Path Protection (SBPP) is widely used for protection against a link failure. Backup Spectrum Reservation with Multi Path Protection (BSR-MPP) was introduced to increase backup spectrum sharing by reserving backup spectrum and employing protection with multiple backup paths. We propose a new polynomial-time strategy, Blocking Aware Survivable Path Provisioning (BASPP) that shares backup resources like SBPP and BSR-MPP but can reduce request blocking when opportunity of sharing resources does not exist. Since we address the offline problem of Survivable Routing, Modulation and Spectrum Allocation in EONs, we also propose an Integer Linear Program formulation. Results show appreciable reduction in bandwidth blocking ratio by using BASPP over existing strategies.Keywords: Elastic optical networksroutingmodulationspectrum allocationsurvivabilityblocking aware Disclosure statementNo potential conflict of interest was reported by the author(s).

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弹性光网络中连接请求的阻塞感知离线生存路径分配

摘要弹性光网络在链路故障时的生存性是一个重要的问题。共享备份路径保护(Shared Backup Path Protection, SBPP)被广泛用于链路故障保护。BSR-MPP (Backup Spectrum Reservation with Multi - Path Protection)是通过预留备份频谱和采用多路径保护来增加备份频谱的共享。我们提出了一种新的多项式时间策略——阻塞感知生存路径分配(BASPP)，该策略可以共享SBPP和BSR-MPP等备份资源，但可以在不存在共享资源的机会时减少请求阻塞。由于我们解决了EONs中可生存路由、调制和频谱分配的离线问题，我们还提出了一个整数线性规划公式。结果表明，与现有策略相比，使用BASPP可显著降低带宽阻塞率。关键词:弹性光网络路由调制频谱分配生存性阻塞感知披露声明作者未报告潜在的利益冲突。

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International Journal of Parallel Emergent and Distributed Systems COMPUTER SCIENCE, THEORY & METHODS-

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2.30

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