基于随机几何理论的无线异构网络性能分析

Performance Analysis in Wireless Heterogeneous Networks Based on Stochastic Geometry Theory

随着移动互联网的快速发展,以及新兴业务和移动应用的爆发性增长,移动用户对传输速率提出了更高的要求。通过在传统的蜂窝上叠加小型基站,使得异构无线网络可以有效地提高蜂窝网络容量。介绍了低功率节点类型、异构网络干扰等无线异构网络的概念及应用场景,构建了异构无线网络模型,异构无线网络其网络节点分布可建模为泊松分布,通过随机几何等数学工具对异构无线网络的性能进行了分析,推导出异构网络的成功传输概率及网络吞吐量。通过实验仿真验证了理论推导的正确性,为异构网络的实际部署提供了理论基础。

With the rapid development of the mobile Intemet and explosive growth of emerging services and mobile applications,mobile users put forward a higher requirement for the data raters. By deploying small cells on the conventional Macrocell network, heterogeneous cellular network can effectively improve the cellular capacity. It introduces the concept and application scenario of wireless heterogeneous network like node type with low power and heterogeneous network interference, and uses a statistical approach based on stochastic geometry to model and evaluate the performance of the proposed system and deduces coverage probability and network throughput of heterogeneous network by stochastic geometry mathematical tools in this paper. Simulation has verified the correctness of theory deduction, which provides a theoretical basis for the actual deployment of heterogeneous networks.