Cooperative Gain and Cooperative Region Aided Relay Selection for Decode-and-Forward Relaying Protocols

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概要

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• In this paper, we study four simple but fundamental cooperative protocols operating in the decode-and-forward (DF) fashion. Intuitively, finding an appropriate relay for such protocols may greatly improve the outage performance in practice. To this end, we investigate the issue of relay selection in this paper. Specifically, using the asymptotic outage probability, we define and derive the cooperative gain (CG) which quantitatively evaluates the superiority of cooperation over direct transmission. To simplify the process of relay selection, we derive the cooperative region (CR) where a relay is necessarily invoked to aid the communication from source to destination. With the aid of CG and CR, we propose our relay selection algorithm requiring the geographical information rather than the instantaneous channel state information (CSI), and predict the optimal relay locations. In addition, two diversity bounds are also prepared and compared. Finally, both simulations and numerical results are provided on the asymptotic outage probability, CG and CR.

著者

• Ai Bo

  State Key Lab. Of Rail Traffic Control And Safety

• Zhong Zhangdui

  State Key Laboratory Of Rail Traffic Control And Safety Beijing Jiaotong University

• CAO Jianfei

  State Key Lab. of Rail Traffic Control and Safety, Beijing Jiaotong University

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• Cooperative Gain and Cooperative Region Aided Relay Selection for Decode-and-Forward Relaying Protocols

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