On the Outage Performance of Decode-and-Forward Opportunistic Mobile Relaying with Direct Link

Kui XU
Youyun XU
Xiaochen XIA

IEICE TRANSACTIONS on Communications   Vol.E99-B    No.3    pp.654-665
Publication Date: 2016/03/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.2015EBP3040
Type of Manuscript: PAPER
Category: Network
outdated CSI,  multiple mobile relays,  decode-and-forward,  outage probability,  diversity,  

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In this paper, we investigate the effect of outdated channel state information (CSI) on decode-and-forward opportunistic mobile relaying networks with direct link (DL) between source node and destination node. Relay selection schemes with different levels of CSI are considered: 1) only outdated CSI is available during the relay selection procedure; 2) not only outdated CSI but also second-order statistics information are available in relay selection process. Three relay selection schemes are proposed based on the two levels of outdated CSI. Closed-form expressions of the outage probability are derived for the proposed relay selection schemes. Meanwhile, the asymptotic behavior and the achievable diversity of three relay selection schemes are analyzed. Finally, simulation results are presented to verify our analytical results.