Wireless Internet. 6th International ICST Conference, WICON 2011, Xi’an, China, October 19-21, 2011, Revised Selected Papers

Research Article

Energy-Efficient Distributed Relay Selection Based on Statistical Channel State Information

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  • @INPROCEEDINGS{10.1007/978-3-642-30493-4_38,
        author={Haifang Jiang and Sihai Zhang and Wuyang Zhou},
        title={Energy-Efficient Distributed Relay Selection Based on Statistical Channel State Information},
        proceedings={Wireless Internet. 6th International ICST Conference, WICON 2011, Xi’an, China, October 19-21, 2011, Revised Selected Papers},
        proceedings_a={WICON},
        year={2012},
        month={10},
        keywords={Amplify-and-Forward(AF) statistical CSI energy efficiency distributed relay selection},
        doi={10.1007/978-3-642-30493-4_38}
    }
    
  • Haifang Jiang
    Sihai Zhang
    Wuyang Zhou
    Year: 2012
    Energy-Efficient Distributed Relay Selection Based on Statistical Channel State Information
    WICON
    Springer
    DOI: 10.1007/978-3-642-30493-4_38
Haifang Jiang1,*, Sihai Zhang,*, Wuyang Zhou1,*
  • 1: University of Science and Technology of China
*Contact email: jhf@mail.ustc.edu.cn, shzhang@ustc.edu.cn, wyzhou@ustc.edu.cn

Abstract

In this paper, distributed relay selection algorithms based on statistical Channel State Information (CSI) in amplify-and-forward mode are proposed, aiming to maximize energy efficiency. With the limited CSI, a tradeoff is made between the total power consumption and the target outage probability at the source. A forwarding threshold is obtained by minimizing the average transmission power. Each relay individually decides whether to participate in forwarding the source signals according to the forwarding threshold. Firstly, a Distributed Multiple Relay Selection (DMRS) algorithm is proposed, in which all candidate relays have the possibility of transmitting the source signals and the threshold is obtained by numerical search. Then a Distributed Single Relay Selection (DSRS) algorithm with low complexity is investigated under the assumption that only one relay forwards the signals. Simulation results indicate that the proposed algorithms provide significant performance gain in terms of energy efficiency over the existing AF-mode relay selection algorithms.