Journal of Xidian University

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Stable-throughput analysis and optimization of cooperative cognitive radio networks based on information and energy cooperation

KUO Yonghong;HE Bingtao;CHEN Jian   

  1. (School of Telecommunications Engineering, Xidian Univ., Xi'an 710071, China)
  • Received:2015-06-27 Online:2016-12-20 Published:2017-01-19

Abstract:

According to the unsaturated data traffic in wireless communications, this paper studies the interaction between primary users (PUs) and secondary users (SUs) in a cooperative cognitive radio network which is based on information and energy cooperation, and optimizes the stable-throughput of SUs. A probabilistic cooperation scheme has been proposed and the stable-throughput region has been characterized in order to reflect the interaction between PUs and SUs by using the Queuing Theory. Then by deriving the optimal value of the relaying probability, the stable-throughput of secondary users can be maximized under the constraint of the primary queue stability. Simulation results and theoretical analysis show that the probabilistic cooperation scheme can achieve maximal stable-throughputs for SUs, and meanwhile PUs can also have a better performance compared to the non-cooperative case.

Key words: simultaneous wireless information and power transfer, cognitive radio, cooperative communication, stable-throughput