5G移动通信系统概述

摘要

4G的成功应用带来了移动互联网的空前繁荣,在为人们提供极大生活便利的同时,也在深刻地改变着人们的行为习惯,培育着众多的新应用和新需求.除了服务于人的需求,人们也期望移动通信能够渗透到各行各业,带来社会各行各业的转型升级.为了满足这些发展需求,5G将带来超高的频谱利用效率、超低的业务时延、超高的连接数密度、超低的功耗等,实现“信息随心至,万物触手及”的未来发展愿景.概述5G的应用场景和能力需求,并结合需求详细介绍5G空中接口新技术和网络结构方面的全新变化.%The successful application of 4G cultivates a flourishing mobile internet and enables us a convenient daily life.Our daily behaviors changed by mobile internet also cultivate new service and application for future.Besides serving the human,the mobile network is also expected to be applied to more and more elements of the society and enable the transformation and upgrade of different industries.To meet these requirements,5G will provide extremely high spectrum efficiency,extremely low latency,extremely high density of the connections,and extremely low power consumption,and enable the vision of "information a finger away,everything in touch".This paper gives the overview of the use cases and performance requirements of 5G system,and introduces the key technologies for the radio air interface and the innovative network architecture.