Defragmentation-Based Capacity Enhancement for Fixed to Flexible-Grid Migration Scenarios in DWDM Networks

Eira, António; Pedro, João; Pires, Joana; Fonseca, Daniel Szente; Fernández-Palacios, Juan Pedro; López, Vı́ctor; Spaelter, Stefan

doi:10.1049/cp.2013.1520

Cited by 5 publications

(2 citation statements)

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“…Ref. [13] evaluated the impact on network capacity of deploying a flex-grid solution over a network which is partially loaded with fixed-grid channels. The authors proposed several migration strategies from fixed-grid to flex-grid networks.…”

Section: Related Workmentioning

confidence: 99%

“…The paths which have the required contiguous slots are listed in a candidate path list (line 8). Now, modulation format and corresponding spectrum allocation for each of the candidate paths are calculated (lines [11][12][13]. Modulation format for corresponding path length p l is calculated using Table 2.…”

Section: Proposed Algorithm: Mixed-grid-aware Dy-namic Resource Allocmentioning

confidence: 99%

See 1 more Smart Citation

Dynamic routing, spectrum, and modulation-format allocation in mixed-grid optical networks

Ahmed

Rahman

Ferdousi

et al. 2020

J. Opt. Commun. Netw.

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Traffic in optical backbone networks is evolving rapidly in terms of type, volume, and dynamicity following the rapid growth of cloud-based services, ongoing adoption of 5G communications, and explosion of Internet of Things (IoT). Elastic Optical Network (EON), by adopting a flexible grid, can provide the required capacity and flexibility to handle these rapid changes. However, operators rarely perform greenfield deployments, so to limit upfront investment, a gradual migration from fixed-grid to flexible-grid switching equipment is preferable. For gradual migration, switching nodes can be upgraded (starting from bottleneck network links) while keeping the rest of the traditional fixed-grid network operational. We refer to the co-existence of fixed-grid and flex-grid optical equipment as a "mixed-grid" network. Traditional algorithms for dynamic resource assignment in EON will not effectively be applicable in a mixedgrid network due to inter-operability issues among fixed and flex-grid nodes. In this study, we propose a new algorithm, called Mixed-grid-aware Dynamic Resource Allocation (MDRA), to solve the route, spectrum, and modulation-format allocation (RSMA) problem in a mixed-grid network while considering inter-operability constraints. Our numerical results (on representative network topologies) show that the proposed method achieves 41% less blocking (for 50% offered load) compared to traditional approach. The proposed method also can gain about 15% more spectrum utilization for same load.

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Section: Related Workmentioning

confidence: 99%

Section: Proposed Algorithm: Mixed-grid-aware Dy-namic Resource Allocmentioning

confidence: 99%

Dynamic routing, spectrum, and modulation-format allocation in mixed-grid optical networks

Ahmed

Rahman

Ferdousi

et al. 2020

J. Opt. Commun. Netw.

View full text Add to dashboard Cite

show abstract

On the comparative efficiency of non-disruptive defragmentation techniques in flexible-grid optical networks

Moniz

Eira

Sousa

et al. 2017

Optical Switching and Networking

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Service differentiation-based spectrum defragmentation in mixed grid optical networks

Zhao

et al. 2020

Optical Fiber Technology

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Defragmentation-Based Capacity Enhancement for Fixed to Flexible-Grid Migration Scenarios in DWDM Networks

Cited by 5 publications

References 0 publications

Dynamic routing, spectrum, and modulation-format allocation in mixed-grid optical networks

Dynamic routing, spectrum, and modulation-format allocation in mixed-grid optical networks

On the comparative efficiency of non-disruptive defragmentation techniques in flexible-grid optical networks

Service differentiation-based spectrum defragmentation in mixed grid optical networks

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