• 中国计算机学会会刊
  • 中国科技核心期刊
  • 中文核心期刊

计算机工程与科学 ›› 2021, Vol. 43 ›› Issue (07): 1226-1235.

• 计算机网络与信息安全 • 上一篇    下一篇

混合频谱分配的三层异构网络覆盖概率分析

胡海霞1,贾向东1,2,叶佩文1,纪澎善1,敬乐天1   

  1. (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)

  • 收稿日期:2020-06-02 修回日期:2020-07-30 接受日期:2021-07-25 出版日期:2021-07-25 发布日期:2021-08-17
  • 基金资助:
    国家自然科学基金(61861039)

Coverage probability analysis of three-layer heterogeneous networks with hybrid spectrum allocation

HU Hai-xia1,JIA Xiang-dong1,2,YE Pei-wen1,JI Peng-shan1,JING Le-tian1   

  1. (1.College of Computer Science and Engineering,Northwest Normal University,Lanzhou 730070;

    2.Wireless Communication Key Laboratory of Jiangsu Province,
    Nanjing University of Posts and Telecommunications,Nanjing 210003,China)
  • Received:2020-06-02 Revised:2020-07-30 Accepted:2021-07-25 Online:2021-07-25 Published:2021-08-17

摘要: 针对城市环境热点区域业务密集化部署带来的流量激增问题,将微微基站和毫微微基站密集部署在宏基站之上以达到分流的效果,构建了一个三层簇异构网络模型。为有效抑制层内和层间传输的严重干扰,提出了一种基于簇分类的改进共享频谱分配方案。采用泊松簇过程和泊松洞过程对基站部署进行建模,详细描述了接收端精确的干扰统计特性,基于有效性准则给出了系统覆盖概率。同时还考虑了有序FBS级联方案和无序FBS级联方案2种情况。仿真结果验证了理论分析的正确性,揭示了网络参数对网络性能的影响。与无序FBS级联方案相比,有序FBS级联方案的性能增益很大程度上取决于PBS和FBS的覆盖半径。 

关键词: 异构网络, 密集部署, 泊松簇过程, 覆盖概率, 泊松洞过程

Abstract: Aiming at the problem of traffic surge caused by business intensive deployment in hot areas of urban environment, a three-layer cluster heterogeneous network model is constructed by densely deploying pico base stations and femto base stations on macro base stations to achieve the effect of diversion. To restrict the severe interference from inter-tier and intra-tier transmitters, an improved shared spectrum separation and allocation scheme is proposed based on cluster classification. The Poisson cluster process and the Poisson hole process are used to model the deployment of the base station, a statistical description of the interference experienced at a typical receiver is given, and then the coverage probabilities based on the validity criterion is derived. At the same time, two cascade cases such as ordered FBS association scheme and non-ordered FBS are considered. The simulation results verify the correctness of the theoretical analysis and reveal the influence of network parameters on network performance. It is concluded that, compared with non-ordered FBS association scheme, ordered FBS association scheme’s performance gain greatly depends on the coverage radii of PBS and FBS.


Key words: heterogeneous network, intensive deployment, Poisson cluster process, coverage probabi- lity, Poisson hole process