基于实际城区场景的TD-LTE异构网络性能研究

摘要

本文对密集城区环境下的实际TD-LTE网络部署进行了研究.通过系统级仿真对宏小区/微小区、宏小区/家庭基站小区、宏小区/微小区/家庭基站小区3种异构网络的下行系统性能进行研究,并与单一宏小区的网络部署场景进行了比较.对实际城区环境下的信号传播损耗模型和用户分布进行了三维空间建模.通过比较4种不同TD-LTE网络部署方案下,位于不同楼层高度室内用户的性能,得出异构网络中不同小区(宏小区、微小区和家庭基站小区)的覆盖和容量特性.%This article has a research on TD-LTE heterogeneous network deployment in a realistic metropolitan scenario. Through system-level simulation, the article studies the downlink system performance of three heterogeneous networks, which are macro cell/micro cell, macro cell/femto cell and macro cell/micro cell/femto cell, and has a comparison with macro cell's performance, meanwhile, models of three-dimensional signal propagation loss and user distribution have been built up. Results on different cell' s (macro cell, micro cell, femto cell) coverage and capacity characteristics in heterogeneous network are come up with after we compare four different TD-LTE network' s performance in different height.