5G网络SSB 1+X波束技术应用研究

Research on SSB 1+X beam technology of 5G network

3GPP标准在5G中引入了波束扫描和空域的维度,信道状态信息(channel state information,CSI)是UE上报给eNodeB的信道状态信息,信道状态信息参考信号(channel state information-reference signal,CSI-RS)是UE用来获取信道状态信息的参考信号。终端接入时基站采用SSB波束轮发探测终端的最优波束,在终端接入后获取参考信号的配置信息后对信道状态信息进行反馈,基站采用CSI-RS波束轮发的最优波束。5G天线灵活配置波束个数并且兼顾水平维度、垂直维度的覆盖。结合广播波束发展、现网水平7波束面临的挑战,分析比较了水平7波束与1+X波束两种方案,并对两种方案进行测试分析。测试结果表明,1+X波束具有较水平7波束覆盖相当、控制干扰、降低资源开销和设备能耗的优势,结合自动优化工具的应用达到提升工作效率的效果。

Beam scanning and spatial dimensions in 5G was introduced in the 3GPP standard.When UE connects gNodeB,gNodeB uses SSB beam rotation to detect the optimal beam of UE.After UE was connected,the CSI-RS configuration information could be obtained and the CSI could be normal feedback,gNodeB adopted the optimal beam transmitted by the CSI-RS beam in turn.5G antennas flexibly configure the number of beams and take into ac-count coverage in both horizontal and vertical dimensions.The development of broadcast beams and the horizontal 7 beams facing challenges were presented,the horizontal 7 beam and 1+X beam schemes were analyzed.Finally,effi-ciency was presented.