A New Relay-Assisted Spectrum Sharing Scheme for Bidirectional Communication
Conference: ISWCS 2013 - The Tenth International Symposium on Wireless Communication Systems
08/27/2013 - 08/30/2013 at Ilmenau, Deutschland
Proceedings: ISWCS 2013
Pages: 5Language: englishTyp: PDF
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Authors:
Hakim, Hela (Department of Computer Sciences, Université de Québec à Montréal, Canada )
Ajib, Wessam (Department of Computer Sciences, Université de Québec à Montréal, Canada)
Boujemaa, Hatem (Carthage University, Higher School of Communication of Tunis, Tunisia)
Abstract:
In this paper, we propose a new relay-assisted spectrum sharing protocol where a pair of secondary users and a pair of primary users bidirectionally communicate. A secondary relay is deployed to assist the secondary transmissions and improve the secondary access to the spectrum. We employ a time division access technique to make primary and secondary users communicate with no interference. The proposed scheme is then compared to the axiomatic and simple scheme where the secondary users communicate in an underlay mode with the assistance of the relay . We study and compare the performances of the two schemes in terms of outage probability. Our simulation results show that the proposed scheme significantly outperforms the underlay spectrum sharing scheme while in both schemes, the primary outage probability is kept identical to the case where secondary users are absent.