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Title Overlay Secondary Spectrum Sharing with Independent Re-attempts in Cognitive Radios
Conf. Name IEEE Sarnoff Symposium
First Author Aresh Dadlani
Coauthor Muthukrishnan Senthil Kumar, Kiseon Kim, Richard O. Afolabi
Publication Date 2016.09.21 Link Link icon
Acceptance Rate Date 2016-11-04 13:07
Opportunistic spectrum access (OSA) is a promising reform paradigm envisioned to address the issue of spectrum scarcity in cognitive radio networks (CRNs). While current models consider various aspects of the OSA scheme, the impact of retrial phenomenon in multi-channel CRNs has not yet been analyzed. In this work, we present a continuous-time Markov chain (CTMC) model in which the blocked/preempted secondary users (SUs) enter a finite retrial group (or orbit)and re-attempt independently for service in an exponentially distributed random manner. Taking into account the inherent retrial tendency of SUs, wenumerically assess the performance of the proposed scheme in terms of droppingprobability and throughput of SUs.
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