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A Buffer-Aided Successive Opportunistic Relay Selection Scheme With Power Adaptation and Inter-Relay Interference Cancellation for Cooperative Diversity Systems
KTH, School of Electrical Engineering (EES), Automatic Control. KTH, School of Electrical Engineering (EES), Centres, ACCESS Linnaeus Centre.
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2015 (English)In: IEEE Transactions on Communications, ISSN 0090-6778, E-ISSN 1558-0857, Vol. 63, no 5, 1623-1634 p.Article in journal (Refereed) Published
Abstract [en]

In this paper, we present a relay selection scheme which combines the spectral efficiency of successive opportunistic relaying with the robustness of single-link relay selection. More specifically, we propose a scheme that minimizes the total energy expenditure per time slot under an inter-relay interference cancellation scheme. The new relay selection policy is analyzed in terms of outage probability and diversity by modeling the evolution of relay buffers as a Markov Chain. We construct the state transition matrix of the Markov Chain and obtain its stationary distribution, which in turn, yields the outage probability. The proposed scheme outperforms relevant state-of-the-art relay selection schemes in terms of throughput, diversity, energy efficiency and average delay, as demonstrated via representative numerical examples.

Place, publisher, year, edition, pages
2015. Vol. 63, no 5, 1623-1634 p.
Keyword [en]
Cooperative relaying, relay selection, power minimization, inter-relay interference, Markov Chains
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URN: urn:nbn:se:kth:diva-169275DOI: 10.1109/TCOMM.2015.2416234ISI: 000354944100011ScopusID: 2-s2.0-84930504733OAI: diva2:822320
Swedish Foundation for Strategic Research

QC 20150616

Available from: 2015-06-16 Created: 2015-06-12 Last updated: 2015-06-16Bibliographically approved

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Charalambous, ThemistoklisJohansson, Mikael
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