基于簇用户设备分类和频谱共享分配的D2D网络覆盖分析

D2D Network Coverage Analysis Based on Cluster User Equipment Classification and Spectrum Sharing Allocation

D2D通信是5G/B5G网络的关键技术之一,同时小小区的中心化部署形成了以父点为中心的簇.因此,文章构建了一个基于泊松点和泊松簇过程的网络模型,提出了一种基于簇的用户设备(User Equipment,UE)分类方案,并设计了联合正交与共享的频谱资源分配方案.基于簇的UEs分类方案将UEs分为不同类型的簇中心和簇边缘UEs;联合频谱分配方案,将可获得的频带分为正交的两个子带,不同类型的UEs(BSs)共享子带.对此设计,建立了D2D接收机的干扰模型,给出了干扰分布,并分析了簇中心和簇边缘D2D接收机的覆盖概率.仿真和数值结果表明D2D网络覆盖概率随着微微BS(Pico BS,PBS)发射功率的减小而增加.同时,也给出了PBS覆盖半径和D2D发射机覆盖半径对D2D网络覆盖概率的影响.

D2D communication is one of the key technologies of 5G/B5G networks.Meanwhile,in 5G/B5G network,the centralized deployment of small base stations(BSs)makes user equipment(UE)located inside or outside the cluster.This paper constructs a network model based on Poisson point and Poisson cluster processes,and proposes a cluster⁃based UEs classification scheme as well as a spectrum resource allocation scheme by joining orthogonal and sharing methods.The cluster⁃based UEs classification scheme divides UEs into different types of cluster center and cluster edge UEs.The joint spectrum allocation scheme divides the available frequency band into two orthogonal sub⁃bands,which are allocated to dif⁃ferent types of UEs(BSs).For this design,this paper establishes a D2D receiver interference model,gives the interference distribution,and analyzes the coverage probability of the cluster center and cluster edge D2D receivers.Simulation and nu⁃merical results show that the D2D network coverage probability increases as the transmit power of pico BS(PBS)decreas⁃es.Meanwhile,the influence of the coverage radius of PBS and D2D transmitters on the coverage probability of the D2D network is also given.