Unified study of Quality of Service (QoS) in OPS/OBS networks

Hailu, Dawit Hadush; Lema, Gebrehiwet Gebrekrstos; Yekun, Ephrem Admasu; Kebede, Samrawit H.

doi:10.1016/j.yofte.2017.05.016

Cited by 14 publications

(9 citation statements)

References 6 publications

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“…Although there has been a lot of criticism concerning the feasibility of OPS/OBS in the near future [15], the technology remains an unignorable alternative to slow electronic switching in the backbone [13]. The fact to date that OPS, OBS and hybrid switching technologies are still being studied extensively from a software and hardware point of view [4,24,7,5,14], shows that they still are very hopeful technologies that in the future will be useful and probably even necessary. If so, efficient void filling and packet scheduling algorithms will be at the heart of the OPS/OBS switch design.…”

Section: Kurt Van Hautegem Wouter Rogiest and Herwig Bruneelmentioning

confidence: 99%

Selective void creation/filling for variable size packets and multiple wavelengths

Hautegem¹,

Rogiest²,

Bruneel³

2018

Journal of Industrial &Amp; Management Optimization

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With ever-increasing demand for bandwidth, both optical packet switching and optical burst switching are proposed as alternatives to increase the capacity of optical networks in the future. In these packet-based switching techniques, Fiber Delay Lines (for delay assignments) and wavelength conversion (for channel assignments) are used to avoid contention between contending packets. The involved scheduling algorithms decide on which Fiber Delay Line and wavelength each packet is scheduled in order to maximize performance. For the setting without wavelength conversion we proposed a scheduling algorithm for assigning delays called void-creating algorithm that outperforms existing void filling algorithms for a variety of packet size distributions. This is achieved by selectively delaying packets longer than strictly necessary based on a numerical procedure that assigns a theoretical value to each void based on how likely the void will eventually be filled and thus prove useful. This contribution extends the concept of void-creation to the important case with multiple wavelengths, where also the channel has to be assigned. Results obtained by Monte Carlo simulation show that with our void-creating algorithm the obtainable improvement in various performance measures highly depends on the number of wavelengths present.

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Section: Kurt Van Hautegem Wouter Rogiest and Herwig Bruneelmentioning

confidence: 99%

Selective void creation/filling for variable size packets and multiple wavelengths

Hautegem¹,

Rogiest²,

Bruneel³

2018

Journal of Industrial &Amp; Management Optimization

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“…Decrease in the performance operation of networks is connected with insufficient protection due to the widespread use of such vulnerable protocols as HTTP, SNMP, FTP, TCP/IP; participation of various categories of users in information processing, immediate and simultaneous access to systems resources and processes [25,26]. In order to provide flexibility of the services provided by networks, papers [27,28] propose the use of virtualization technologies and a protocol of multiple access with temporal division (TDMA) to a channel at the network level.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Assessment of functional efficiency of a corporate scientificeducational network based on the comprehensive indicators of quality of service

Yevseiev

Ponomarenko

Rayevnyeva

2017

EEJET

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4in the field of electronic education led to the establishment of CSES, to the integration of informational and computer networks of universities into a unified information and cybernetic space, which significantly extended the range of educational services and functions of CSES at educational establishments, to the integration of services into social networks, and further use of remote access in various forms of education. However, such an integration creates educational system with a mission-critical cybernetic infrastructure (SCCI), thereby increasing the risk of its hacking/destruction of its components and unauthorized access to confidential information of CSES.The analysis of threats, performed in [7][8][9][10][11][12], indicates their substantial transformation and hybridity. Starting from threats to informational, cybernetic security and information safety of the infrastructure of CSES, the attributes of hybridity of threats now manifest themselves in the simultaneous activity on the object of protection -confidential, scientific/intellectual information at CSES due to the 4  S. Yevseiev, V. Ponomarenko, O. Rayevnyeva, 2017 IntroductionThe advent of high technologies enables mankind to further develop capacities of computational systems. The rapid growth and expansion of the functionality of enterprise systems and social networks make it possible to construct integrated social-informational networks to address a diverse range of tasks. Further development of the data transmission technology Ethernet creates a global ideology for the deployment of telecommunication networks [1][2][3][4].The development of e-learning systems and corporate educational systems (CES) is closely linked to the expansion of possibilities for remote access to the informational assets of state information educational systems (IES) based on Ethernet technologies [5]. Further integration of CES leads to the formation of corporate scientific-educational systems (CSES) -networking cooperation of associations of organizations aimed at producing particular intelligent products of the networking interaction [6]. Thus, revolutionary changes INFORMATION TECHNOLOGY ASSESSMENT OF FUNCTIONAL EFFICIENCY OF A CORPORATE SCIENTIFIC-EDUCATIONAL NETWORK BASED ON THE COMPREHENSIVE INDICATORS OF QUALITY OF SERVICE S . Y e v s e i e vPhD, Associate Professor Department of Information Systems* E-mail: serhii.yevseiev@m.hneu.edu.ua V . P o n o m a r e n k oDoctor of Economic Sciences, Professor, Rector* O . R a y e v n y e v aDoctor of Economic Sciences, Professor, Head of Department Department of statistics and economic forecasting* E-mail: olena.raev@m.hneu.edu.ua *Simon Kuznets Kharkiv National University of Economics Nauky ave., 9-А, Kharkiv, Ukraine, 61166Розглядається методика оцінки функціональ-ної ефективності обміну даними в корпоративної науково-освітньої мережі, яка ґрунтується на простому багатофакторному аналізі, в якій вра-ховуються як технічні показники мережі, показ-ники безпеки технічних засобів захисту інфор-мації, так і економічні па...

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“…The Service Level Agreement (SLA), signed by the service providers and their clients, defines the minimum quality of service (QoS) acceptable for each user, measured as a probabilistic guarantee. The definition of these bounds is obtained considering objective criteria, such as: different quality of service requirements [14,15,16]; and subjective decisions, such as network scalability requirements. Based on these QoS agreements, engineers must design the network fulfilling said QoS requirements.…”

Section: Introductionmentioning

confidence: 99%

How much the wavelength dimensioning methods and a tightened QoS provision impact on the dynamic WDM optical networks capacity?

Jara

Pempelfort

Rubino

et al. 2020

Optical Switching and Networking

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This article gives an insight on the importance to assign a different capacity to each network link and to tighten the Quality of Service (QoS) provision in the network, in dynamic WDM Optical Networks with wavelength continuity constraints. In the text, several examples illustrate the performance of different strategies. The usual procedure to compute the number of wavelengths of each network link consists of choosing the same capacity to each link on the network. This decision is selected, in most cases, by simplicity and simulation limitations. Notwithstanding, there are no technical motives to force a uniform capacity on the network. In consequence, we analyze the impact on the network capacity of designating the minimum amount of wavelengths to each network link, while satisfying each user QoS requirement. Moreover, despite the chosen dimensioning strategy, it is usual to offer a much better QoS than requested for some users, with the corresponding waste of resources. We can amend this issue by limiting which wavelengths are available to each user according to its particular QoS constraint. This technique, known as Wavelength Grouping, seeks to provide to each user a QoS level closer to the one defined in the Service Level Agreement. By doing so, it is possible to reduce the network capacity needed to allow communication to its user, or diminishing the network blocking probability for a given wavelength capacity. In spite of the usual approach, in this work, we demonstrate that a nonuniform dimensioning strategy and a tighten QoS provision allows to save significant networks capacity, while simultaneously provisioning to each user the QoS established in its Service Level Agreement. This fact is very relevant nowadays, where an impending capacity crunch in optical networks is an important issue.

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Unified study of Quality of Service (QoS) in OPS/OBS networks

Cited by 14 publications

References 6 publications

Selective void creation/filling for variable size packets and multiple wavelengths

Selective void creation/filling for variable size packets and multiple wavelengths

Assessment of functional efficiency of a corporate scientificeducational network based on the comprehensive indicators of quality of service

How much the wavelength dimensioning methods and a tightened QoS provision impact on the dynamic WDM optical networks capacity?

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Unified study of Quality of Service (QoS) in OPS/OBS networks

Cited by 14 publications

References 6 publications

Selective void creation/filling for variable size packets and multiple wavelengths

Selective void creation/filling for variable size packets and multiple wavelengths

Assessment of functional efficiency of a corporate scientific­educational network based on the comprehensive indicators of quality of service

How much the wavelength dimensioning methods and a tightened QoS provision impact on the dynamic WDM optical networks capacity?

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Assessment of functional efficiency of a corporate scientificeducational network based on the comprehensive indicators of quality of service