中继协作异构网用户对级联方案及安全概率分析  

Analysis for Users-Pair Association Schemes and Security Probability of Relay-Aided Het Nets

作　　者：纪珊珊 贾向东 徐文娟[1] 周猛 JI Shan-shan;JIA Xiang-dong;XU Wen-juan;ZHOU Meng(College of Computer Science and Engineering,Northwest Normal University,Lanzhou,Gansu 730070,China;Wireless Communication Key Lab of Jiangsu Province,Nanjing University of Posts and Telecommunications,Nanjing,Jiangsu 210003,China)

机构地区：[1]西北师范大学计算机科学与工程学院,甘肃兰州730070 [2]南京邮电大学江苏省无线通信重点实验室,江苏南京210003

出　　处：《信号处理》2018年第6期697-706,共10页Journal of Signal Processing

基　　金：国家自然科学基金项目(61561043;61261015);甘肃省高校基本科研业务费专项资金项目"面向5G的Massive MIMO毫米波段信道建模及其估计";西北师范大学学生创新能力提升计划"面向毫米波的大规模MIMO异构网络方案设计及性能分析"(CX2018Y043)

摘　　要：文章提出了一种基于中继协作的多层异构网(heterogeneous networks,Het Nets)模型,其由不同类型的中继和在中继协助下通信的用户对构成,这些网络元素均建模为独立的泊松点过程(Poisson point process,PPP)。不同于传统的单跳网络,该网络中用户对的级联由两跳链路决定,为此,文章面向该网络首先提出了最大-最小用户对级联(maximum-minimum user-pair association,MM-UPA)方案。同时,为了克服MM-UPA准则的瓶颈效应,文章又提出了联合考虑两跳链路质量的最大和谐均值用户对级联(maximum harmonic mean user-pair association,MHM-UPA)方案。其次,借助于随机几何和PPP方法,分别得到了MM-UPA和MHM-UPA方案的用户对级联概率。最后,作为所提方案的应用,研究了网络物理层安全性能,获得了网络平均安全概率。研究结果表明,两种方案均联合考虑了信源-中继和中继-信宿两跳链路的性能,优于基于单跳的用户级联方案,适用于中继协作的多层Het Nets。This paper proposes a model of relay cooperative multi-tier heterogeneous networks（ Het Nets）,which consists of different types of relays and user pairs communicate with each other through the relay. All network elements are modeled as independent Poisson point process（ PPP）. Different from the traditional single-hop network,the user-pair associated depending on dual-hop link. To this end,the paper proposes a maximum-minimum user-pair association（ MM-UPA） criterion against this novel network. Meanwhile,in order to overcome the bottleneck effect of MM-UPA criterion,a new UPA scheme which called maximum harmonic mean user-pair association（ MHM-UPA） is further proposed in this paper,and this MHM-UPA criterion considers jointly dual-hop link. Posteriorly,by means of stochastic geometry and PPP,the user pair association probabilities of MM-UPA and MHM-UPA scheme are obtained,respectively. In the end,as an implementation of the proposed UPA criterions,the physical layer security of the considered Het Nets is investigated,and the total average security probabilities are gained. The results show that proposed two UPA criterions consider jointly the performance of the source-relay and relay-destination two-hop links,and both are superior to single-hop user association scheme,so are suitable for relay assisted multi-tier Het Nets.

关 键 词：第五代移动通信 异构网 中继 用户对级联准则 物理层安全 

分 类 号：TN929.5[电子电信—通信与信息系统]