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Simulation Analysis in Cognitive Radio Networks with Unreliability and Abandonment

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Information Technologies and Mathematical Modelling. Queueing Theory and Applications (ITMM 2020)

Part of the book series: Communications in Computer and Information Science ((CCIS,volume 1391))

Abstract

The current paper presents a Cognitive Radio Network with impatient customers and unreliable servers by the help of a finite-source retrial queueing system. We consider two types of customers (primary and secondary) assigned to two interconnected frequency bands. A first frequency band with a priority queue and a second frequency band with an orbit are reserved for Primary Users (PUs) and Secondary Users (SUs), respectively. If the servers are busy, both customers (licensed and unlicensed) enter either the queue or orbit. Before they enter orbit, the secondary customers receive a random retrial time according to the exponential distribution, i.e. the waiting time before the next retry. Unlicensed users (impatient) are obliged to leave the system as soon as their total waiting time exceeds a random maximum waiting time. It should be noted, that the secondary service unit of our system is subject to random breakdowns and repairs. The novelty of this work consists in the investigation of the abandonment and secondary server unreliability impact on various performance measures of the system (Cognitive Radio Network), such as the mean response and waiting time of users, the probability of abandonment of SU, etc. Several figures illustrate the problem in question through simulation.

The research work of János Sztrik is supported by the EFOP-3.6.1-16-2016-00022 project. The project is co-financed by the European Union and the European Social Fund. Mohamed Hedi Zaghouani is supported by the Stipendium Hungaricum Scholarship.

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Author information

Authors and Affiliations

  1. Doctoral School of Informatics, Faculty of Informatics, University of Debrecen, Debrecen, Hungary

    Hamza Nemouchi, Mohamed Hedi Zaghouani & János Sztrik

Authors
  1. Hamza Nemouchi
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  2. Mohamed Hedi Zaghouani
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  3. János Sztrik
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Correspondence to Mohamed Hedi Zaghouani .

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Editors and Affiliations

  1. Belarusian State University, Minsk, Belarus

    Alexander Dudin

  2. Tomsk State University, Tomsk, Russia

    Anatoly Nazarov

  3. Tomsk State University, Tomsk, Russia

    Alexander Moiseev

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Nemouchi, H., Zaghouani, M.H., Sztrik, J. (2021). Simulation Analysis in Cognitive Radio Networks with Unreliability and Abandonment. In: Dudin, A., Nazarov, A., Moiseev, A. (eds) Information Technologies and Mathematical Modelling. Queueing Theory and Applications. ITMM 2020. Communications in Computer and Information Science, vol 1391. Springer, Cham. https://doi.org/10.1007/978-3-030-72247-0_3

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  • DOI: https://doi.org/10.1007/978-3-030-72247-0_3

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  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-030-72246-3

  • Online ISBN: 978-3-030-72247-0

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