Performance Analysis And Research Of D2D Networks Based On Stochastic Geometry

With the continuous advancement of social informatization process,mobile communication technology is accelerating,and mobile data traffic is also growing rapidly with the diversified development of video,music,and games.The fifth-generation mobile communication networks(5G)has become a research focus in the global communication field because it can greatly improve spectrum efficiency and data upload and download speed.As one of the key technologies of 5G,device to device communication technology has produced many practical and guiding research results in terms of resource allocation,caching strategy,power control and other aspects.However,it still faces issues such as interference management,mode selection,and network performance analysis.This article focuses on modeling and performance analysis of D2 D network.For a single finite area D2 D network scenario,this paper models the D2 D node position in the finite area network based on the Bernoulli point process.In view of the fact that millimeter waves can greatly increase the system capacity and transmission rate,but it is easy to be hindered,so it is more suitable for short distance communication.In this paper,millimeter waves are deployed in D2 D networks,and then the blocking model,channel model,and antenna model in the network are modeled separately,and the coverage probability is used as a performance index to analyze the performance of finite area D2 D networks.On this basis,the D2 D typical receiver adopts two different service transmitter selection schemes,and then the coverage probability under these two schemes is compared and analyzed.Simultaneously,the influence of the number of equipment and other parameters on the network performance is simulated and analyzed.The simulation results show that the number of devices in the network and changes in device antenna parameters have a greater impact on the coverage probability.For the clustered D2 D network scenario,this paper uses the Poisson cluster process to model the location of the D2 D nodes in the network.The millimeter wave is also deployed in the network model,and the coverage probability and regional spectrum efficiency are used as network performance indicators to analyze the performance of the clustered D2 D network.First,the interference sources and corresponding interference distances at typical receivers are classified and discussed.Then,the expressions of clustered D2 D network coverage probability and regional spectral efficiency are derived using random geometry theory,and the correctness of the analysis method is verified by simulation.At the same time,this paper also analyzes the influence of interference power and noise on the coverage probability within and between clusters in combination with simulation.The results show that,compared with the inter-cluster interference power,the intra-cluster interference power has a more obvious impact on the coverage probability of clustered D2 D networks,and noise will also have a greater impact on the coverage probability under certain conditions.In addition,through comparison,it is found that whether the coverage probability results of the devices in the cluster obey the uniform distribution and the Gaussian distribution are similar,which is related to the service transmitter selection scheme and the value of the distribution parameter.