Performance Modeling of Partitioning and Slicing Spectrum Assignment Schemes in EONs
Performance Modeling of Partitioning and Slicing Spectrum Assignment Schemes in EONs
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DOI：
10.1109/icc45855.2022.9838859
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发表时间：
2022-05
期刊：
影响因子：
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通讯作者：
P. Zou;Shrinivas Petale;Juzi Zhao;S. Subramaniam
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文献类型：
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作者：
P. Zou;Shrinivas Petale;Juzi Zhao;S. Subramaniam
路由和频谱分配(RSA)是弹性光网络(EONS)中的一个众所周知的问题，文献中有大量的启发式算法试图有效地利用频谱并缓解频谱碎片。然而，eons的阻塞性能建模是一个相对较少探讨的主题，这主要是因为处理可变请求大小的复杂性。本文分析了三种频谱分配策略，并对它们的阻塞性能进行了比较。在完全分片策略中，每个请求被分成多个单槽调用。在划分策略中，每个请求大小都被分配了一个专用的频谱分区，并且每个请求只能从其对应的分区中分配频谱。采用切片策略的分区是这两种策略的混合体--对于较小的请求大小有专用分区，但较大的请求被切片为多个较小大小的子请求，并从这些分区分配频谱。我们得到了这三种策略的带宽阻塞率的表达式，并用大量的仿真结果验证了分析。我们的结果表明，使用切片的划分具有最好的性能。
Routing and Spectrum Assignment (RSA) is a well-known problem in Elastic Optical Networks (EONs), and the literature abounds with numerous heuristic algorithms that attempt to efficiently utilize spectrum and mitigate spectrum fragmentation. However, blocking performance modeling of EONs is a relatively under-explored topic, mainly because of the complexity of handling variable request sizes. In this paper, we analyze three spectrum assignment policies and compare their blocking performance. In the full slicing policy, every request is sliced into multiple one-slot calls. In the partitioning policy, each request size is allocated a dedicated spectrum partition, and each request can be only assigned spectrum from its corresponding partition. The partition with slicing policy is a hybrid of the two – there are dedicated partitions for small request sizes, but large requests are sliced into multiple sub-requests of the smaller sizes and assigned spectrum from those partitions. We obtain expressions for the bandwidth blocking probability for these three policies, and validate the analysis with extensive simulation results. Our results show that partitioning with slicing has the best performance.