Analysis of Basic Cognitive Radio and Queuing-Based Request Handling
Most of the communication in today’s world is shifting toward wireless because of various benefits associated with it. However, these benefits are realized at the expense of extensive research done in this field to improve the efficiency of spectrum utilization. This necessitated the evolution of a new technique referred to as dynamic spectrum access and cognitive radio networks. An unending research in this field has made it a topic of interest in today’s era. This paper is also an attempt toward understanding the basic model of a cognitive radio. Formulation of a simple channel allocation algorithm and its queuing-based improvement form the core of this paper. Finally, an extensive quantitative analysis of the results provides a better understanding of the model and the scope for future improvements. The result for an optimum environment shows that the proposed queuing-based improvement outperforms simple allocation by a relative increase in channel usage around 19% (1 over 0.84) and secondary usage, around 47% (0.34 over 0.23).
KeywordsCognitive Radio Network Channel Allocation Queuing Dynamic Spectrum Access Spectrum Sharing Channel Usage
- 6.J. Mitola, Cognitive radio: An integrated agent architecture for software defined radio, Doctor of Technology, Royal Institute of Technology (KTH), Stockholm, Sweden, 2000Google Scholar
- 8.D. Cabric, S.M. Mishra, R.W. Brodersen, Implementation issues in spectrum sensing for cognitive radios, in Proceedings of the 38th Asilomar Conference on Signals, Systems and Computers 2004, pp. 772–776, November 2004Google Scholar
- 9.F. Wang, M. Krunz, S. Cui, Price-based spectrum management in cognitive radio networks, IEEE Journal of Selected Topics in Signal Processing, 2(1):74–87 (2008)Google Scholar
- 10.D. Cabric, R.W. Brodersen, Physical layer design issues unique to cognitive radio systems, in Proceedings IEEE Personal Indoor and Mobile Radio Communications (PIMRC) 2005, September 2005Google Scholar
- 11.D. Cabric, S.M. Mishra, D. Willkomm, R. Brodersen, A. Wolisz, A cognitive radio approach for usage of virtual unlicensed spectrum, in Proceedings 14th IST Mobile and Wireless Communications Summit, June 2005Google Scholar