Title: A hybrid channel transmission method for effective spectrum access in cognitive radio networks

Authors: Sanjay Kumar Dhurandher; Bhoopendra Kumar; Isaac Woungang; Han-Chieh Chao

Addresses: Department of Information Technology, Netaji Subhas University of Technology, New Delhi, India; National Institute of Electronics and Information Technology, Delhi Centre, New Delhi, India ' CAITFS, Division of Information Technology, Netaji Subhas Institute of Technology, University of Delhi, Delhi, India; KIET Group of Institutions, Delhi-NCR, Ghaziabad, India ' Department of Computer Science, Ryerson University, Toronto, Ontario, Canada ' Department of Electrical Engineering, National Dong Hwa University, Hualien, Taiwan; Department of Computer Science and Information Engineering, National Ilan University, I-Lan, Taiwan; Institute of Computer Science and Innovation, UCSI University, Kuala Lumpur, Malaysia

Abstract: Cognitive radio is considered as a very influencing technique and has the great potential to solve the problem of shortage of the radio spectrum. A secondary user also called as a cognitive user may access the primary channel(s) with a certain restrictions in a cognitive radio network. Spectrum sensing is a very important activity during the process of spectrum access. This paper proposes a Markov chain-based proactive hybrid spectrum access method for maximising the radio spectrum usage by optimising the channel sensing process and establishing the channel switching conditions. Using the OMNeT++ simulator, the proposed method (proactive hybrid access) is compared against that of the conventional (reactive hybrid access), overlay, and underlay access methods, showing its superiority by about 20% in terms of performance improvement with respect to throughput, service delay, and PU detection probability.

Keywords: radio spectrum; cognitive radio; spectrum sensing; hybrid spectrum access; Markov chain; OMNeT++.

DOI: 10.1504/IJAHUC.2023.135109

International Journal of Ad Hoc and Ubiquitous Computing, 2023 Vol.44 No.4, pp.221 - 232

Received: 01 May 2023
Accepted: 26 Jun 2023
Published online: 30 Nov 2023 *

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