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A performance study of dynamic routing algorithm for SDM translucent optical networks with assistive storage
Optical Switching and Networking ( IF 2.2 ) Pub Date : 2020-05-16 , DOI: 10.1016/j.osn.2020.100572
Wojciech Kmiecik , Krzysztof Walkowiak

In this paper, we focus on dynamic lightpath provisioning in translucent spectrally spatially flexible optical networks (SS-FONs) created with a combination of both spectral (EON) and spatial (SDM) flexibility. We utilize the distance-adaptive transmission (DAT) in order to select a modulation for request and routing path in a flexible manner. Moreover, we assume that the signal regeneration is realized with the application of optical transceivers operating in a back-to-back (B2B) configuration. Finally, we propose a novel routing framework for SS-FONs, which involves performing Store-and-Forward (SnF) using Assistive Storage (AS), to reduce peak traffic demand and to better the utilization of network bandwidth. We design different test scenarios, varying in Assistive Storage availability, with and without modulation conversion during the B2B regeneration process and different real-life network topologies. In order to be able to compare the results of test scenarios, we propose a dynamic routing algorithm named adaptive routing with B2B regeneration and Assistive Storage (ARB2BAS) that solves routing, space and spectrum allocation (RSSA) optimization problem. We study how different flexibility aspect affects the network blocking performance, namely the Bandwidth Blocking Probability (BBP) metric. The obtained results show that the proper selection of an algorithm (scenario) has a significant impact on network performance in terms of the blocking probability. Moreover, introducing Assistive Storage enables the network to serve more requests for all of the studied B2B scenarios and network topologies.



中文翻译:

具有辅助存储的SDM半透明光网络动态路由算法的性能研究

在本文中,我们专注于在结合了光谱(EON)和空间(SDM)灵活性的情况下创建的半透明光谱空间柔性光网络(SS-FON)中的动态光路配置。我们利用距离自适应传输(DAT),以便以灵活的方式选择用于请求和路由路径的调制。此外,我们假设信号再生是通过以背对背(B2B)配置运行的光收发器实现的。最后,我们为SS-FON提出了一种新颖的路由框架,该框架涉及使用辅助存储(AS)执行存储转发(SnF),以减少峰值流量需求并更好地利用网络带宽。我们设计了不同的测试方案,辅助存储可用性有所不同,在B2B再生过程中使用和不使用调制转换以及不同的实际网络拓扑。为了能够比较测试方案的结果,我们提出了一种动态路由算法,称为自适应路由,具有B2B再生和辅助存储(ARB2BAS),可解决路由,空间和频谱分配(RSSA)优化问题。我们研究了不同的灵活性方面如何影响网络阻塞性能,即带宽阻塞概率(BBP)指标。获得的结果表明,就阻塞概率而言,正确选择算法(方案)对网络性能具有重大影响。此外,引入辅助存储使网络能够为所有已研究的B2B场景和网络拓扑提供更多请求。

更新日期:2020-05-16
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