Spectrum sharing optimization based on joint user cluster pairing scheme in CRN-NOMA systems

S. Thiyagarajan (), K. Kumar () and S. Renuka ()
Additional contact information
S. Thiyagarajan: Pondicherry Technological University
K. Kumar: Pondicherry Technological University
S. Renuka: PERI Institute of Technology

International Journal of System Assurance Engineering and Management, 2024, vol. 15, issue 9, No 19, 4527-4539

Abstract: Abstract This paper addresses the challenge of enhancing spectrum sharing in Cognitive Radio Networks (CRNs) while maintaining optimal data rates, energy efficiency, and interference thresholds. We introduce an innovative approach that integrates Non-Orthogonal Multiple Access (NOMA) into CRNs to accommodate a higher number of secondary users effectively. The core of this methodology is the development of a Joint User Cluster Pairing (J-UCP) scheme, which plays a pivotal role in balancing energy constraints against average interference power in the CRN-NOMA system. The J-UCP scheme operates by first arranging secondary users in ascending order of their channel gains relative to the secondary base station. These users are then divided into two groups: a ‘strong user group’ comprising the upper half and a ‘weak user group’ forming the lower half. In an innovative step, the weak user group is further split and reordered. Pairing within these groups follows a strategic protocol: a strong and a weak user are paired only if their channel gain difference exceeds a predefined threshold. This process effectively mitigates the formation of low-gain (near-gain) user pairs, which can impede system performance. Our research primarily investigates the energy efficiency of these user pairs in relation to average interference power, considering both peak and average energy efficiencies across Rayleigh and Rician channels. Additionally, we explore the ergodic capacity of user pairs under these parameters. The findings demonstrate the efficacy of the J-UCP scheme in optimizing the performance of CRN-NOMA systems, presenting a significant advancement in the field of wireless communication.

Keywords: Cognitive radio networks (CRN); Non-orthogonal multiple access (NOMA); Joint user cluster pairing (J-UCP); Spectrum sharing; Energy efficiency (search for similar items in EconPapers)
Date: 2024
References: View complete reference list from CitEc
Citations:

Downloads: (external link)
http://link.springer.com/10.1007/s13198-024-02469-7 Abstract (text/html)
Access to the full text of the articles in this series is restricted.

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:spr:ijsaem:v:15:y:2024:i:9:d:10.1007_s13198-024-02469-7

Ordering information: This journal article can be ordered from
http://www.springer.com/engineering/journal/13198

DOI: 10.1007/s13198-024-02469-7

Access Statistics for this article

International Journal of System Assurance Engineering and Management is currently edited by P.K. Kapur, A.K. Verma and U. Kumar

More articles in International Journal of System Assurance Engineering and Management from Springer, The Society for Reliability, Engineering Quality and Operations Management (SREQOM),India, and Division of Operation and Maintenance, Lulea University of Technology, Sweden
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().