基于NR的5G多播/广播关键技术  

Key technologies of NR multicast and broadcast services

作　　者：徐霞艳 XU Xiayan(China Academy of Information and Communication Technology,Beijing 100191,China)

机构地区：[1]中国信息通信研究院,北京100191

出　　处：《电信科学》2022年第7期175-183,共9页Telecommunications Science

基　　金：2021年工业和信息化部产业技术基础公共服务平台资助项目“面向5G高速大连接物联网的产业技术基础公共服务平台”(No.2021-H02A-1-1)

摘　　要：交互式网络电视(internet protocol television,IPTV)、群组通信等应用具有明显的多播/广播业务特征,5G蜂窝移动通信系统需要高效支持这类应用数据的传输。首先,按照多播/广播业务数据从5G核心网经由基站到终端的不同传输方式分析了5G多播/广播系统的基本架构;然后,从无线空口协议栈、物理层与高层协议增强、业务过程与业务连续性等方面对5G多播/广播无线传输技术进行了详细分析;最后,对5G多播/广播技术的后续演进方向进行了展望。Internet protocol television(IPTV),group communication and other applications are regarded as multicast/broadcast services.5G cellular mobile communication system should support the transmission of such application data efficiently.Firstly,the basic architecture of 5G multicast/broadcast system based on NR was analyzed according to the different transmission modes of multicast/broadcast application data from 5GC to UE via gNB.Then,the key technologies of 5G multicast/broadcast radio transmission were analyzed in detail from the aspects of air interface protocol stack,physical layer and higher layer protocol enhancements,service process and service continuity,etc.Finally,the evolution trends of 5G multicast/broadcast technology were prospected.

关 键 词：5G MBS 多播/广播 无线传输技术 

分 类 号：TN929.5[电子电信—通信与信息系统]