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dc.contributor.authorCelik, Abdulkadir
dc.contributor.authorGhadhban, Amer Al
dc.contributor.authorShihada, Basem
dc.contributor.authorAlouini, Mohamed-Slim
dc.identifier.citationCelik A, Ghadhban AA, Shihada B, Alouini M-S (2018) Design and Provision of Traffic Grooming for Optical Wireless Data Center Networks. IEEE Transactions on Communications: 1–1. Available:
dc.description.abstractTraditional wired data center networks (DCNs) suffer from cabling complexity, lack flexibility, and are limited by the speed of digital switches. In this paper, we alternatively develop a top-down traffic grooming (TG) approach to the design and provisioning of mission-critical optical wireless DCNs. While switches are modeled as hybrid optoelectronic cross-connects, links are modeled as wavelength division multiplexing (WDM) capable free-space optic (FSO) channels. Using the standard TG terminology, we formulate the optimal mixed-integer TG problem considering the virtual topology, flow conversation, connection topology, non-bifurcation, and capacity constraints. Thereafter, we develop a fast yet efficient sub-optimal solution which grooms mice flows (MFs) and mission-critical flows (CFs) and forward on predetermined rack-to-rack (R2R) lightpaths. On the other hand, elephant flows (EFs) are forwarded over dedicated serverto- server (S2S) express lightpaths whose routes and capacity are dynamically determined based on the availability of wavelength and capacity. To prioritize the CFs, we consider low and high priority queues and analyze the delay characteristics such as waiting times, maximum hop counts, and blocking probability. As a result of grooming the sub-wavelength traffic and adjusting the wavelength capacities, numerical results show that the proposed solutions can achieve significant performance enhancement by utilizing the bandwidth more efficiently, completing the flows faster than delay sensitivity requirements, and avoiding the traffic congestion by treating EFs and MFs separately.
dc.publisherInstitute of Electrical and Electronics Engineers (IEEE)
dc.rights(c) 2018 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.
dc.subjectblocking probability analysis
dc.subjectdelay analysis
dc.subjecthybrid cross-connect
dc.subjectintensity allocation
dc.subjectlightpath provisioning
dc.subjectmission-critical data centers
dc.subjectwavelength assignment
dc.subjectWavelength routing
dc.titleDesign and Provision of Traffic Grooming for Optical Wireless Data Center Networks
dc.contributor.departmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
dc.contributor.departmentComputer Science Program
dc.contributor.departmentElectrical Engineering Program
dc.identifier.journalIEEE Transactions on Communications
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)
kaust.personCelik, Abdulkadir
kaust.personGhadhban, Amer Al
kaust.personShihada, Basem
kaust.personAlouini, Mohamed-Slim

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