Survivable transparent OFDM optical grids/clouds: fragmentation aware, resource efficient protection with fast failure recovery

IF 1.8 4区计算机科学 Q3 COMPUTER SCIENCE, INFORMATION SYSTEMS Photonic Network Communications Pub Date : 2024-01-14 DOI:10.1007/s11107-023-01011-2

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Abstract

Due to high spectral efficiency and flexibility of orthogonal frequency division multiplexing (OFDM) technology, OFDM-based optical grids/clouds are fast replacing WDM grids/clouds. As grids and clouds process data intensive tasks, protection of optical grids and clouds from an arbitrary fiber-cut is extremely important. Employing a protection scheme leads to idle resource reservation, and data are continuously lost till protection (backup) paths become operational after a link failure. So, a protection scheme should not only minimize reservation of idle resources; it must also make the network recover quickly from a failure. In a dynamic scenario, another important issue is spectral fragmentation which leads to increased blocking of requests. In this paper, we address the problem of providing protection to OFDM-based transparent optical grids/clouds ensuring fast failure recovery with minimizing of both resource consumption and spectral fragmentation to the extent possible. To the best of our knowledge, this is the first paper to address the said problem for transparent OFDM optical grids/clouds. Performance comparisons show that the proposed polynomial time algorithm, fragmentation-aware resource-efficient protection with fast recovery (FRPFR) decreases spectrum utilization, decreases bandwidth blocking ratio and increases backup spectrum sharing by 27.88%, 35.37% and 35.94%, respectively, over algorithm protection with fast recovery (PFR) and by 11.95%, 20.29% and 14.35%, respectively, over algorithm resource-efficient protection with fast recovery (RPFR).

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可存活的透明 OFDM 光网/云：分片感知、资源高效保护与快速故障恢复

摘要由于正交频分复用（OFDM）技术的高频谱效率和灵活性，基于 OFDM 的光栅/光云正在迅速取代波分复用光栅/光云。由于光栅和光云处理的是数据密集型任务，因此保护光栅和光云免受任意光纤切割极为重要。采用保护方案会导致资源预留闲置，数据会持续丢失，直到链路故障后保护（备份）路径开始运行。因此，保护方案不仅要尽量减少闲置资源的预留，还必须使网络从故障中快速恢复。在动态情况下，另一个重要问题是频谱碎片，它会导致请求阻塞增加。在本文中，我们要解决的问题是为基于 OFDM 的透明光网/云提供保护，确保快速故障恢复，同时尽可能减少资源消耗和频谱碎片。据我们所知，这是第一篇针对透明 OFDM 光网/云解决上述问题的论文。性能比较表明，所提出的多项式时间算法--具有快速恢复功能的碎片感知资源高效保护（FRPFR）比具有快速恢复功能的算法保护（PFR）分别降低了 27.88%、35.37% 和 35.94%，比具有快速恢复功能的算法资源高效保护（RPFR）分别降低了 11.95%、20.29% 和 14.35%，从而降低了频谱利用率，降低了带宽阻塞率，提高了备份频谱共享率。

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来源期刊

Photonic Network Communications 工程技术-电信学

CiteScore

4.10

自引率

5.90%

发文量

审稿时长

12 months

期刊介绍： This journal publishes papers involving optical communication networks. Coverage includes network and system technologies; network and system architectures; network access and control; network design, planning, and operation; interworking; and application design for an optical infrastructure This journal publishes high-quality, peer-reviewed papers presenting research results, major achievements, and trends involving all aspects of optical network communications. Among the topics explored are transport, access, and customer premises networks; local, regional, and global networks; transoceanic and undersea networks; optical transparent networks; WDM, HWDM, and OTDM networks and more.