异构蜂窝网不规则部署下的干扰管理和性能分析

发布时间：2018-04-08 15:34

本文选题：异构网　切入点：泊松点过程　出处：《北京交通大学》2017年硕士论文

【摘要】：随着无线通信的飞速发展,传统的蜂窝网络已经无法满足急剧增长的移动用户数和大数据量的业务需求,多元化、密集化的异构网络成为当前网络发展的主要方向。在异构网络中,干扰问题成为限制网络性能提升的主要瓶颈之一,而基站的分布又对干扰问题的研究起着至关重要的作用。传统的网格状网络模型过于理想,不能反映出异构网络基站分布的特点,并且需要进行大规模的系统级仿真才能得到网络性能结果。而泊松点过程能够反映网络中节点分布的随机性,其良好的数学统计特性也为网络性能的分析提供了便利。所以,本文使用泊松点过程对异构网络建模,并通过泊松点过程的相关性质和数学统计方法得出能够反映网络性能的表达式,避免了复杂的系统级仿真,为网络性能分析提供了一种简便易行的方案。本文的主要研究工作包括:(1)针对蜂窝网络下D2D通信场景,建立网络模型,并推导覆盖率表达式和用户接入概率分布函数;(2)在蜂窝网络下的D2D通信场景基础上,对干扰消除技术进行分析和建模,推导出干扰消除技术的覆盖率表达式和用户接入概率分布函数,并通过仿真分析干扰消除技术对系统性能的影响;(3)建立了异构网络场景下增强型小区干扰协调技术的网络模型,推导了网络频谱效率分布函数;(4)在异构网络场景下提出一种增强型小区干扰协调技术的双连接动态调度方法,并通过仿真对这种方案进行分析,证明了这一方案能够增加边缘用户的传输机会,保障了网络平均频谱效率,且更适用于几乎空白子帧比例较低的场景和更强调负载均衡的场景。本文通过建立不同场景和不同干扰管理方案的网络模型,推导得到能够反映网络性能的覆盖率、用户接入概率分布函数、频谱效率分布函数等表达式,为分析网络性能提供了一种简便有效的方法,降低了大规模的系统级仿真的时间和成本代价。
[Abstract]:With the rapid development of wireless communication, the traditional cellular network has been unable to meet the rapid increase in the number of mobile users and large amount of data business requirements, diversification, dense heterogeneous networks become the main direction of the current network development.In heterogeneous networks, interference problem has become one of the main bottlenecks to limit the performance of the network, and the distribution of base stations plays an important role in the study of interference problems.The traditional grid-like network model is too ideal to reflect the characteristics of base station distribution in heterogeneous networks, and large-scale system-level simulation is needed to get the network performance results.Poisson point process can reflect the randomness of node distribution in the network, and its good mathematical and statistical properties also provide convenience for the analysis of network performance.Therefore, this paper uses Poisson point process to model the heterogeneous network, and through the relevant properties of Poisson point process and mathematical statistics method to obtain the expression that can reflect the network performance, avoiding the complex system level simulation.It provides a simple scheme for network performance analysis.The main research work of this paper includes: (1) establishing a network model for D2D communication scenarios in cellular networks, and deducing the coverage expression and user access probability distribution function / 2) on the basis of D2D communication scenarios in cellular networks.The interference cancellation technology is analyzed and modeled, and the coverage expression and user access probability distribution function of interference cancellation technology are derived.The influence of interference cancellation technology on system performance is analyzed by simulation. (3) the network model of enhanced cell interference coordination technology in heterogeneous network scenario is established.In this paper, the spectrum efficiency distribution function of the network is derived. In the heterogeneous network scenario, an enhanced cell interference coordination dynamic scheduling method is proposed, and the scheme is analyzed by simulation.It is proved that the proposed scheme can increase the transmission opportunities of edge users, ensure the average spectral efficiency of the network, and be more suitable for scenarios with low ratio of almost blank subframes and more emphasis on load balancing.In this paper, the network models of different scenarios and different interference management schemes are established, and the network coverage, user access probability distribution function, spectrum efficiency distribution function and so on are derived.It provides a simple and effective method for analyzing network performance and reduces the time and cost of large-scale system-level simulation.
【学位授予单位】：北京交通大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN929.5

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