携能通信协作认知网络稳态吞吐量分析和优化阔永红贺冰涛陈健.pdfVIP

2016 年 12 月 西安电子科技大学学报（自然科学版） Dec.2016 第 43 卷 第 6 期 JOURNAL OF XIDIAN UNIVERSITY Vol.43 No.6 doi：10.3969/j.issn.1001-2400.2016.06.001 携能通信协作认知网络稳态吞吐量分析和优化 阔永红，贺冰涛，陈健 （西安电子科技大学 通信工程学院，陕西 西安 710071） 摘要：在携能通信协作认知网络中针对主用户和认知用户的非饱和数据传输问题，研究主用户网络和认 知用户网络稳态吞吐量之间的相互作用关系，并对认知网络进行稳态吞吐量的优化。首先提出一种“概 率协作”的传输策略，采用排队论的方法对该场景进行网络层建模和分析求解出系统的稳态吞吐量域， 并以此反映主用户网络和认知用户网络的相互作用关系。其次通过求解“概率协作”策略中认知用户的 最优协作传输概率，在保证主用户系统稳定的情况下，最大化认知用户的稳态吞吐量。仿真和分析表明 采用“概率协作”的传输策略能使认知用户获得最大的稳态吞吐量，同时主用户网络相比于无协作时系 统性能也有了较大的提升。 关键词：携能通信；认知无线电；协作通信；稳态吞吐量 中图分类号：TN92 文献标识码：A 文章编号：1001-2400(2016)06-0001-08 Stable-throughput analysis and optimization of cooperative cognitive radio networks based on information and energy cooperation KUO Yonghong, HE Bingtao, CHEN Jian (School of Telecommunication Engineering, Xidian Univ. , Xi’an 710071, China) Abstract: According to the unsaturated data traffic in wireless communications, this paper studied 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 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 theoret