Dynamic Controller Deployment for Mixed-Grid Optical Networks

Rahman, Sabidur; Ahmed, Tanjila; Ferdousi, Sifat; Bhaumik, Partha; Chowdhury, Pulak; Tornatore, Massimo; Das, Goutam; Mukherjee, Biswanath

doi:10.1109/acp.2018.8596290

Cited by 3 publications

(3 citation statements)

References 4 publications

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“…Each network domain requires domain-specific controller(s), that are connected to other domains via backbone optical links. For example, we consider six fixed-grid domains (4,5,7,9,12), two 'packet network' domains (8 and 11), and six flex-grid domains (1,2,3,10,13,14). Later, our study also considers larger domains in Fig.…”

Section: Illustrative Numerical Examplesmentioning

confidence: 99%

“…In our previous study [13], we discussed state-of-the-art control-plane architectures for transport network and motivations behind virtualization of controllers. In this study, we explore the technical details of the dynamic controller placement problem (e.g., latency requirements, resource limitations at Edge-DCs, heterogeneous types of controllers, controller capacity limitations, etc.…”

Section: Introductionmentioning

confidence: 99%

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Virtualized Controller Placement for Multi-domain Optical Transport Networks

Rahman¹,

Ahmed²,

Ferdousi³

et al. 2020

Optical Network Design and Modeling

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Optical multi-domain transport networks are often controlled by a hierarchical distributed architecture of controllers. Optimal placement of these controllers is very important for their efficient management and control. Traditional SDN controller placement methods focus mostly on controller placement in datacenter networks. But the problem of virtualized controller placement for multi-domain transport networks needs to be solved in the context of geographically-distributed heterogeneous multi-domain networks. In this context, Edge Datacenters have enabled network operators to place virtualized controller instances closer to users, besides providing more candidate locations for controller placement. In this study, we propose a dynamic controller placement method for optical transport networks that considers the heterogeneity of optical controllers, resource limitations at edge hosting locations, latency requirements, and costs. Simulation studies considering practical scenarios show significant cost savings and delay reductions compared to standard placement approaches.

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Section: Illustrative Numerical Examplesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Virtualized Controller Placement for Multi-domain Optical Transport Networks

Rahman¹,

Ahmed²,

Ferdousi³

et al. 2020

Optical Network Design and Modeling

Self Cite

View full text Add to dashboard Cite

show abstract

“…And the proposed subtree algorithms could effectively reduce the request blocking probability by using slightly more bandwidth-variable transponders (BVTs) and better utilization of the higher-level modulation formats [4]. Flexible features of flex-grid networks are exploited for the dynamic placement of controllers enabled by virtualization of controllers [5]. A new algorithm, called mixed-grid-aware dynamic resource allocation, is proposed to solve the route, spectrum, and modulation-format allocation problem in a mixed-grid network while considering interoperability constraints [6].…”

Section: Introductionmentioning

confidence: 99%

Spectrum Availability Aware Routing and Resource Allocation for Point-to-Multipoint Services in Mixed-Grid Optical Networks

Feng

Zhu

et al. 2021

Proceedings of CECNet 2021

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Mixed-grid optical networks are in a migration state where fixed-grid and flex-grid optical networks coexist. To carry point-to-multipoint (P2MP) services in mixed-grid optical networks, routing and resource allocation (RRA) problems need to be solved. Once the RRA fails, services will be blocked and then influence quality of service. The minimized spectrum for satisfying the bandwidth request of services is called as a frequency block (FB). For a service, the total number of available FBs embodies the spectrum availability on a link. Because the fixed-grid and flex-grid links have different channel spacing, spectrum availability on fixed-grid and flex-grid links needs different evaluation method. We propose a RRA algorithm in mixed-grid optical networks for P2MP services by being aware of spectrum availability. The spectrum availability is evaluated according to fixed-grid and flex-grid constraints. Our proposed algorithm achieves the lower blocking probability (BP) than that of benchmark RRA algorithms according to simulation results.

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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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Dynamic Controller Deployment for Mixed-Grid Optical Networks

Cited by 3 publications

References 4 publications

Virtualized Controller Placement for Multi-domain Optical Transport Networks

Virtualized Controller Placement for Multi-domain Optical Transport Networks

Spectrum Availability Aware Routing and Resource Allocation for Point-to-Multipoint Services in Mixed-Grid Optical Networks

Service differentiation-based spectrum defragmentation in mixed grid optical networks

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