中文摘要：

软件定义网络技术SDN将网络控制功能与转发功能分离,使网络架构变得简明清晰。在简述传统卫星网络和地面LTE网络优势的基础上,概述卫星LTE星地融合网络,将SDN技术的核心思想引入卫星网络,提出基于SDN的卫星LTE融合网络架构,使用NS-3网络仿真软件实现对所提融合网络模型的仿真平台搭建,通过对不同场景下仿真数据的分析,评估所构建网络的性能,给出SDN卫星LTE融合网络的优势。

英文摘要：

Software Defined Networking（ SDN） technology separates the control function from the forwarding function,which makes network architecture simple and clear. Based on a brief introduction to advantages of traditional satellite network and terrestrial LTE networks,the converged satellite and terrestrial LTE network is reviewed.The converged satellite and terrestrial LTE network architecture based on SDN is proposed by applying SDN technology to satellite network. Then the simulation platform construction of the proposed converged network model is implemented by using the NS-3 network simulation software. The performance of the converged network is evaluated through analysis of simulation data under different scenarios,and the advantages of the converged satellite and terrestrial LTE network architecture based on SDN are given.