Next Article in Journal
A Novel Microtiter Plate Format High Power Open Source LED Array
Next Article in Special Issue
A Modified Design of a Hexagonal Circular Photonic Crystal Fiber with Large Negative Dispersion Properties and Ultrahigh Birefringence for Optical Broadband Communication
Previous Article in Journal
International System of Units (SI) Traceable Noise-Equivalent Power and Responsivity Characterization of Continuous Wave ErAs:InGaAs Photoconductive Terahertz Detectors
Previous Article in Special Issue
Identifying the Contribution of Carrier Shot Noise and Random Carrier Recombination to Excess Frequency Noise in Tunable Lasers
Open AccessArticle

Optical Space Switches in Data Centers: Issues with Transport Protocols

1
School of Computing, Ulster University, Coleraine BT52 1SA, UK
2
Radio and Optical Communications Laboratory, Dublin City University, Dublin D9, Ireland
3
School of Computing Sciences, University of East Anglia, Norwich NR4 7TJ, UK
*
Authors to whom correspondence should be addressed.
Photonics 2019, 6(1), 16; https://doi.org/10.3390/photonics6010016
Received: 14 December 2018 / Revised: 1 February 2019 / Accepted: 15 February 2019 / Published: 22 February 2019
(This article belongs to the Special Issue Lightwave Communications and Optical Networks)
A number of new architectures for data centre networks employing reconfigurable, SDN controlled, all-optical networks have been reported in recent years. In most cases, additional capacity was added to the system which unsurprisingly improved performance. In this study, a generalised network model that emulates the behaviour of these types of network was developed but where the total capacity is maintained constant so that system behaviour can be understood. An extensive emulated study is presented which indicates that the reconfiguration of such a network can have a detrimental impact on Transmission Control Protocol (TCP) congestion control mechanisms that can degrade the performance of the system. A number of simple scheduling mechanisms were investigated and the results show that an on-demand scheduling mechanism could deliver a throughput increase of more than ∼50% without any increase in total installed network capacity. These results, therefore, indicate the need to link the network resource management with new datacentre network architectures. View Full-Text
Keywords: optical space switch; transport layer; SDN optical space switch; transport layer; SDN
Show Figures

Figure 1

MDPI and ACS Style

Abu-Tair, M.; Perry, P.; Morrow, P.; McClean, S.; Scotney, B.; Parr, G.; Biswas, M.I. Optical Space Switches in Data Centers: Issues with Transport Protocols. Photonics 2019, 6, 16.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop