Optimising virtual networks over time by using Windows Multiplicative DEA model

Francisco Daladier Marques Júnior, Ali Emrouznejad, Kelvin Lopes Dias, Paulo Roberto Freire Cunha, Jorge Luiz De Castro E Silva

Research output: Contribution to journalArticlepeer-review


Recently, the prediction of the most efficient configuration of a vast set of devices used for mounting an optimised cloud computing services and virtual networks environments have attracted growing attention. This paper proposes a paradigm shift in modelling transmission control protocol (TCP) behaviour over time in virtual networks by using data envelopment analysis (DEA) models. Firstly, it proves that self-similarity with long-range dependency is presented differently in every network device. This study implements a novel fractal dimension concept on virtual networks for prediction, where this key index informs if the transport layer forwards services with smooth or jagged behaviour over time. Another substantial contribution is proving that virtual network devices have a distinct fractal memory, TCP bandwidth performance, and fractal dimension over time, presenting themselves as important factor for forecasting of spatiotemporal data. Thus, a continuous stepwise fractal performance evaluation framework methodology is developed as an expert system for virtual network assessment and performs a fractal analysis as a knowledge representation. In addition, due to the limitations of classical DEA models, the windows multiplicative data envelopment analysis (WMDEA) model is used to dynamically assess the fractal time series from virtual network hypervisors. For knowledge acquisition, 50 different virtual network hypervisors were appraised as decision-making units (DMU). Finally, this expert system also acts as a math hypervisor capable of determining the correct fractal pattern to follow when delivering TCP services in an optimised virtual network.
Original languageEnglish
Pages (from-to)209-225
Number of pages17
JournalExpert Systems with Applications
Early online date9 May 2019
Publication statusPublished - 15 Oct 2019

Bibliographical note

© 2019, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/


  • Cloud computing
  • Fractal expert system
  • Network Optimisation
  • Stepwise Performance Evaluation
  • Virtual Networks
  • Windows multiplicative data envelopment analysis


Dive into the research topics of 'Optimising virtual networks over time by using Windows Multiplicative DEA model'. Together they form a unique fingerprint.

Cite this