Abstract
Cognitive Radio (CR) is a mechanism that adjusts its radio parameters dynamically to use the unoccupied spectrum holes so as to overcome the problem of spectrum shortage arose due to enormously increasing wireless devices. It is done by assigning free spectrum to the unlicensed users without compromising the licensed users. Hence, distinguishing Primary Users (PUs) from Secondary Users (SUs) is a major concern in CRN and it becomes more challenging when it has to be done at the physical layer, without understanding the data in the signals. Here, we propose a mechanism to authenticate a PU based upon approximation of distance and angle of arrival of the signal received from it. We also propose a mechanism where a SU can be hopped to Dedicated Control Channel (DCCH) for seamless communication, when it has to vacate the spectrum for PU and there are no traffic channels (TCH) to continue its ongoing communication.
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Acknowledgments
Authors gratefully acknowledge the support offered by Dr. Garimella Rama Murthy, IIITH and also the resources provided by the Department of Computer Science and Engineering at Central University of Rajasthan, Kishangarh to complete this work.
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Muzzammil Hussain, Suditi Choudhary (2016). Authentication of Primary User at Physical Layer Through Approximation in Cognitive Radio. In: Afzalpulkar, N., Srivastava, V., Singh, G., Bhatnagar, D. (eds) Proceedings of the International Conference on Recent Cognizance in Wireless Communication & Image Processing. Springer, New Delhi. https://doi.org/10.1007/978-81-322-2638-3_33
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DOI: https://doi.org/10.1007/978-81-322-2638-3_33
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