Optimal spectrum utilisation in cognitive network using combined spectrum sharing approach: overlay, underlay and trading

Ayoub Alsarhan, Anjali Agarwal, Ibrahim Obeidat, Mohammad Bsoul, Ahmad Al-Khasawneh and Yousef Kilani

International Journal of Business Information Systems, 2013, vol. 12, issue 4, 423-454

Abstract: Cognitive radio technology enables unlicensed users (secondary users, SUs) to access the unused spectrum. In the literature, there are three spectrum sharing paradigms that enable SUs to access the licensed spectrum. These access techniques include underlay, overlay and spectrum trading, and have their own drawbacks. To combat these drawbacks, we propose a new approach for each of them and merge them into one combined system. Our overlay scheme provides quick access to the unused spectrum. We propose a new cooperative sensing protocol to reduce the likelihood of interfering with PUs. In order to enable SUs for transmitting simultaneously with PUs, we suggest using our underlay scheme. Our trading scheme allows PUs to trade the unused spectrum for the SUs that require better quality of service. The new combined scheme increases the size of spectrum in the cognitive network. Simulation results show the ability of the new scheme to serve extra traffic.

Keywords: cognitive networks; spectrum management; spectrum overlay; spectrum underlay; spectrum secondary market; spectrum trading; spectrum utilisation; spectrum sharing; cognitive radio; cooperative sensing protocol; simulation. (search for similar items in EconPapers)
Date: 2013
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