<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>Cognitive Radio (CR) is an advanced technology, which intends to boost the radio spectrum utilization. On perceiving the spectrum holes, next there is a need to provide a fair distribution of the vacant licensed channels amongst Secondary Users (SUs) during the spectrum allocation process. In this context, our paper introduces two allocation models to resolve the spectrum allocation problem. Initially, we design a simple centralized model to assign the channels. Then, we extend it to a centralized fair allocation model that aims to impart a better utilization of the free channels. Both approaches assign a common channel to a group of non-interfering SUs simultaneously. This facilitates spectrum reuse. The constraint related to dynamics in spectrum opportunities in CR is handled during channel allocation. Simulation study analyzes the proposed approaches with an existing allocation mechanism and reveals the performance improvement of centralized fair allocation model in terms of spectrum utilization.</p>
</abstract>

Cognitive Radio (CR) is an advanced technology, which intends to boost the radio spectrum utilization. On perceiving the spectrum holes, next there is a need to provide a fair distribution of the vacant licensed channels amongst Secondary Users (SUs) during the spectrum allocation process. In this context, our paper introduces two allocation models to resolve the spectrum allocation problem. Initially, we design a simple centralized model to assign the channels. Then, we extend it to a centralized fair allocation model that aims to impart a better utilization of the free channels. Both approaches assign a common channel to a group of non-interfering SUs simultaneously. This facilitates spectrum reuse. The constraint related to dynamics in spectrum opportunities in CR is handled during channel allocation. Simulation study analyzes the proposed approaches with an existing allocation mechanism and reveals the performance improvement of centralized fair allocation model in terms of spectrum utilization.

A Centralized Model Enabling Channel Reuse for Spectrum Allocation in Cognitive Radio Networks

Department of Computer Science & Engineering

Cybernetics and Information Technologies

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Cognitive Radio (CR) is an advanced technology, which intends to boost the radio spectrum utilization. On perceiving the spectrum holes, next there is a need...

A Centralized Model Enabling Channel Reuse for Spectrum Allocation in Cognitive Radio Networks

Published Online: Jul 01, 2021

Page range: 183 - 200

Received: Aug 01, 2020

Accepted: Apr 12, 2021

DOI: https://doi.org/10.2478/cait-2021-0026

Keywords
Cognitive radio, dynamic spectrum access, spectrum allocation, spectrum opportunities, channel reuse

© 2021 Monisha Devi et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

A Centralized Model Enabling Channel Reuse for Spectrum Allocation in Cognitive Radio Networks

Published Online: Jul 01, 2021

Page range: 183 - 200

Received: Aug 01, 2020

Accepted: Apr 12, 2021

DOI: https://doi.org/10.2478/cait-2021-0026

KeywordsCognitive radio, dynamic spectrum access, spectrum allocation, spectrum opportunities, channel reuse

© 2021 Monisha Devi et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Keywords
Cognitive radio, dynamic spectrum access, spectrum allocation, spectrum opportunities, channel reuse