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

Research output: Contribution to journalArticle


Research units

  • University of the Aegean
  • KTH Royal Institute of Technology
  • University of Cyprus


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
Issue number5
Publication statusPublished - 1 May 2015
MoE publication typeA1 Journal article-refereed

    Research areas

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

ID: 11259247