A buffer-aided successive opportunistic relay selection scheme with power adaptation and inter-relay interference cancellation for cooperative diversity systems

Nikolaos Nomikos, Themistoklis Charalambous, Ioannis Krikidis, Dimitrios N. Skoutas, Demosthenes Vouyioukas, Mikael Johansson

Research output: Contribution to journalArticleScientificpeer-review

44 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)1623-1634
Number of pages12
JournalIEEE Transactions on Communications
Volume63
Issue number5
DOIs
Publication statusPublished - 1 May 2015
MoE publication typeA1 Journal article-refereed

Keywords

  • Cooperative relaying
  • inter-relay interference
  • Markov Chains
  • power minimization
  • relay selection

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