A Buffer-Aided Successive Opportunistic Relay Selection Scheme With Power Adaptation and Inter-Relay Interference Cancellation for Cooperative Diversity Systems

作者：Nomikos Nikolaos^*; Charalambous Themistoklis; Krikidis Ioannis; Skoutas Dimitrios N; Vouyioukas Demosthenes; Johansson Mikael

来源：IEEE Transactions on Communications, 2015, 63(5): 1623-1634.

DOI：10.1109/TCOMM.2015.2416234

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

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.

• 出版日期2015-5