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Photonics
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Optical Data Center Networks
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Optical Data Center Networks

A special issue of Photonics (ISSN 2304-6732). This special issue belongs to the section "Data-Science Based Techniques in Photonics".

Deadline for manuscript submissions: closed (28 February 2022) | Viewed by 4707

Special Issue Editors

Prof. Dr. Zabih Ghassemlooy

E-Mail Website
Guest Editor
Department of Mathematics, Physics and Electrical Engineering, Northumbria University, Newcastle NE1 8ST, UK
Interests: optical wireless communications; visible light communications; radio over fibre and VLC
Special Issues, Collections and Topics in MDPI journals
Dr. Philip Perry

E-Mail Website
Guest Editor
British Telecom Ireland Innovation Centre (BTIIC), School of Computing, Ulster University, Coleraine BT37 0QB, UK
Interests: computer systems and networking; wireless sensor networks; data-center communication; cloud computing and wireless networks
Special Issues, Collections and Topics in MDPI journals
Dr. Conor McArdle

E-Mail Website
Guest Editor
School of Electronic Engineering, Dublin City University, Dublin 9, Ireland
Interests: optical networks; queuing theory; datacenter networks

Special Issue Information

Dear Colleagues,

Cloud Computing has seen continued growth in recent years due to the enormous increase in the demands for data storage, data analytics, video delivery, cognitive computing and the integration of the Internet of Things. As the engine of Cloud Computing, Data Centers have experienced large increases in data traffic volumes (with expected IP traffic of 21 Zb by the end of 2021) and in the required numbers of compute and storage nodes that need to be interconnected. This continued expansion poses very significant challenges for future Data Center Networks, in terms of bandwidth provisioning and the required degrees of network connectivity and configurability. Continued innovation in Optical Data Center Network architectures, fast optical switching, and photonic transmission technologies are the key in enabling this growth and requires a multidisciplinary approach from the computer science, telecommunications, optical and electrical devices, optical transmission, energy efficiency and sustainability domains.

This special issue invites research and review articles on recent advances towards the next-generation data center optical networking. Topics of interest include, but are not limited to, the following areas:

  • Scalable optical switch fabrics and network architectures;
  • Flexible/configurable optical networking, Software Defined Networking;
  • Advances in optical and electrical technologies to support fast optical packet switching, circuit switching and optical routing;
  • High speed optical wired and wireless transmission and detection, advanced modulation formats, coherent detection;
  • 6G and beyond wireless networks in data centers;
  • mmWave and THz wireless technologies in data center interconnects;
  • Hybrid wireless technologies for data centers;
  • Machine learning in data centers;
  • Data center network performance, optimization and traffic modelling;
  • Real-time transmission, switching and network control techniques;
  • Security in data centers;
  • Mobile data center/cloud system design;
  • Energy efficiency, low power usage effectiveness, and the economics of data center optical networking, green data centers, integration of renewable energy technologies and optical communications;

Prof. Dr. Zabih Ghassemlooy
Dr. Philip Perry
Dr. Conor McArdle
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Photonics is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Published Papers (2 papers)

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Research

16 pages, 1882 KiB  
Article
CASM: A Cost-Aware Switch Migration Strategy for Elastic Optical Inter-Datacenter Networks
by Yong Liu, Qian Meng, Zhonghua Shen and Fulong Yan
Photonics 2022, 9(5), 315; https://doi.org/10.3390/photonics9050315 - 06 May 2022
Viewed by 1437
Abstract
In inter-datacenter elastic optical networks, multi-controller deployment is adopted to improve the stability and scalability of the control plane. As the network scale increases, the traditional multi-controller deployment scheme ignores the dynamic characteristics of traffic, resulting in unbalanced load among multiple controllers. In [...] Read more.
In inter-datacenter elastic optical networks, multi-controller deployment is adopted to improve the stability and scalability of the control plane. As the network scale increases, the traditional multi-controller deployment scheme ignores the dynamic characteristics of traffic, resulting in unbalanced load among multiple controllers. In response to this problem, the existing switch migration mechanism is proposed to achieve balanced distribution of control loads. However, most of the existing research work does not consider the additional cost of switch migration, and the load balancing performance of the controller is not significantly improved after switch migration. In this paper, we propose a cost-aware switch migration (CASM) strategy for controller load balancing. The proposed CASM strategy first measures the controller load through multiple performance indicators that affect the controller load, and then judges whether the controller is overloaded or underloaded based on the controller’s response time to the request message, thereby improving the load balancing performance of the controller. Additionally, when selecting the switch to be migrated, the CASM selects the optimal switch for migration based on minimizing the migration cost, thereby reducing the cost of switch migration. The performance evaluation shows that CASM significantly improves load balancing performance of controllers and reduces the migration cost compared to existing solutions. Full article
(This article belongs to the Special Issue Optical Data Center Networks)
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13 pages, 5385 KiB  
Article
Low-Latency Optical Wireless Data-Center Networks Using Nanoseconds Semiconductor-Based Wavelength Selectors and Arrayed Waveguide Grating Router
by Shaojuan Zhang, Xuwei Xue, Eduward Tangdiongga and Nicola Calabretta
Photonics 2022, 9(3), 203; https://doi.org/10.3390/photonics9030203 - 21 Mar 2022
Cited by 12 | Viewed by 2636
Abstract
In order to meet the massively increasing requirements of big-data applications, data centers (DCs) are key infrastructures to cope with the associated demands, such as high performance, easy scalability, low cabling complexity and low power consumption. Many research efforts have been dedicated to [...] Read more.
In order to meet the massively increasing requirements of big-data applications, data centers (DCs) are key infrastructures to cope with the associated demands, such as high performance, easy scalability, low cabling complexity and low power consumption. Many research efforts have been dedicated to traditional wired data center networks (DCNs). However, DCNs’ static and rigid topology based on optical cables significantly limits their flexibility, scalability, and even reconfigurability. The limitations of this wired connection can be addressed with optical wireless technology, which avoids cable complexity problems while allowing dynamic adaption and fast reconfiguration. Here, we propose and investigate a novel optical wireless data-center network (OW-DCN) architecture based on nanoseconds semiconductor optical amplifier (SOA)-based wavelength selectors and arrayed waveguide grating router (AWGR) controlled by fast field-programmable gate array (FPGA)-based switch schedulers. The full architecture, including the design, packet-switching strategy, contention solving methodology, and reconfiguration capability, is presented and demonstrated. Dynamic switch scheduling with a FPGA-based switch scheduler processing optical label and software-defined network (SDN)-based reconfiguration were experimentally confirmed. The proposed OW-DCN was also achieved with a power penalty of less than 2 dB power penalty at BER < 1 × 10−9 for a 50 Gb/s OOK transmission and packet-switching transmission. Full article
(This article belongs to the Special Issue Optical Data Center Networks)
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