Virtual Network Embedding With Adaptive Modulation in Flexi-Grid Networks

Lin, Rongping; Luo, Shan; Zhou, Jingwei; Wang, Sheng; Cai, Anliang; Zhong, Wen‐De; Zukerman, Moshe

doi:10.1109/jlt.2017.2764940

Cited by 24 publications

(16 citation statements)

References 23 publications

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“…Several variants of the VNE problem have been studied over the last decade for layer 2/3 network virtualization [6]. The problem has been investigated in the context of traditional optical networks [7] and, more recently, in the context of EONs [11], [12], [14]. The authors in [11] and [12] investigated two variants of the VNE problem over EONs, namely transparent and opaque VNE.…”

Section: Related Workmentioning

confidence: 99%

“…The problem has been investigated in the context of traditional optical networks [7] and, more recently, in the context of EONs [11], [12], [14]. The authors in [11] and [12] investigated two variants of the VNE problem over EONs, namely transparent and opaque VNE. In the transparent case all the virtual links of a VN must use the same spectrum for their substrate links, while in the opaque VNE case only the substrate links in the embedding of a virtual link must use the same spectrum.…”

Section: Related Workmentioning

confidence: 99%

“…The state-of-the-art in VNE over EON does not jointly consider all the aforementioned flexible transmission parameters, rather considers only a subset of them [11], [12]. Another aspect of the problem is cost-benefit analysis, i.e., what is the cost of introducing flexibility in a specific transmission parameter (e.g., upgrading transceivers to support adaptive modulation formats and FECs) and how much are the resource allocation benefits for VNE stemming from this flexibility.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Achieving a Fully-Flexible Virtual Network Embedding in Elastic Optical Networks

Shahriar

Taeb

Chowdhury

et al. 2019

IEEE INFOCOM 2019 - IEEE Conference on Computer Communications

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Network operators must continuously scale the capacity of their optical backbone networks to keep apace with the proliferation of bandwidth-intensive applications. Today's optical networks are designed to carry large traffic aggregates with coarse-grained resource allocation, and are not adequate for maximizing utilization of the expensive optical substrate. Elastic Optical Network (EON) is an emerging technology that facilitates flexible allocation of fiber spectrum by leveraging finer-grained channel spacing, tunable modulation formats and Forward Error Correction (FEC) overheads, and baud-rate assignment, to right size spectrum allocation to customer needs. Virtual Network Embedding (VNE) over EON has been a recent topic of interest due to its importance for 5G network slicing. However, the problem has not yet been addressed while simultaneously considering the full flexibility offered by an EON. In this paper, we present an optimization model that solves the VNE problem over EON when lightpath configurations can be chosen among a large (and practical) set of combinations of paths, modulation formats, FEC overheads and baud rates. The VNE over EON problem is solved in its splittable version, which significantly increases problem complexity, but is much more likely to return a feasible solution. Given the intractability of the optimal solution, we propose a heuristic to solve larger problem instances. Key results from extensive simulations are: (i) a fully-flexible VNE can save up to 60% spectrum resources compared to that where no flexibility is exploited, and (ii) solutions of our heuristic fall in more than 90% of the cases, within 5% of the optimal solution, while executing several orders of magnitude faster.

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Section: Related Workmentioning

confidence: 99%

Section: Related Workmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Achieving a Fully-Flexible Virtual Network Embedding in Elastic Optical Networks

Shahriar

Taeb

Chowdhury

et al. 2019

IEEE INFOCOM 2019 - IEEE Conference on Computer Communications

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“…VNE over EON Variants of the VNE problem have been extensively studied over the last decade considering layer 2/3 SN [13]. VNE has also been investigated in the context of fixed-grid optical networks [30] and, more recently, in the context of EONs [26]- [28], [31]. Most of the research on VNE over EON considers tuning a subset of the flexible transmission parameters for optimizing resource allocation.…”

Section: Related Workmentioning

confidence: 99%

“…VNE over EON introduces unique challenges arising from the large number of configurable transmission parameters available in EONs [26]. Several proposals for optimal resource allocation in EONs have considered tuning all or a subset of these transmission parameters for satisfying bandwidth requirements [26]- [28]. However, no work in the EON virtualization literature has considered satisfying pathbased latency requirements.…”

Section: Introductionmentioning

confidence: 99%

Virtual Network Embedding with Path-based Latency Guarantees in Elastic Optical Networks

Taeb

Shahriar

Chowdhury

et al. 2019

2019 IEEE 27th International Conference on Network Protocols (ICNP)

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Elastic Optical Network (EON) virtualization has recently emerged as an enabling technology for 5G network slicing. A fundamental problem in EON slicing (known as Virtual Network Embedding (VNE)) is how to efficiently map a virtual network (VN) on a substrate EON characterized by elastic transponders and flexible grid. Since a number of 5G services will have strict latency requirements, the VNE problem in EONs must be solved while guaranteeing latency targets. In existing literature, latency has always been modeled as a constraint applied on the virtual links of the VN. In contrast, we argue in favor of an alternate modeling that constrains the latency of virtual paths. Constraining latency over virtual paths (vs. over virtual links) poses additional modeling and algorithmic challenges to the VNE problem, but allows us to capture end-toend service requirements. In this paper, we first model latency in an EON by identifying the different factors that contribute to it. We formulate the VNE problem with latency guarantees as an Integer Linear Program (ILP) and propose a heuristic solution that can scale to large problem instances. We evaluated our proposed solutions using real network topologies and realistic transmission configurations under different scenarios and observed that, for a given VN request, latency constraints can be guaranteed by accepting a modest increase in network resource utilization. Latency constraints instead showed a higher impact on VN blocking ratio in dynamic scenarios.

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Location constrained virtual optical network embedding in space-division multiplexing elastic optical networks

Zhang

Yeung

2023

Computer Networks

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Virtual Network Embedding With Adaptive Modulation in Flexi-Grid Networks

Cited by 24 publications

References 23 publications

Achieving a Fully-Flexible Virtual Network Embedding in Elastic Optical Networks

Achieving a Fully-Flexible Virtual Network Embedding in Elastic Optical Networks

Virtual Network Embedding with Path-based Latency Guarantees in Elastic Optical Networks

Location constrained virtual optical network embedding in space-division multiplexing elastic optical networks

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