两步随机接入机制的深度解析和未来增强  

Deep Analysis and Further Enhancement for Two-Step Random Access Mechanism

作　　者：魏浩 张梦洁 杨立[3,4] WEI Hao;ZHANG Mengjie;YANG Li(ZTE Corporation,Shenzhen 518055,China;State Key Laboratory of Mobile Network and Mobile Multimedia Technology,Shenzhen 518055,China)

机构地区：[1]中兴通讯股份有限公司无线研究院,广东深圳518055 [2]中兴通讯股份有限公司,广东深圳518055 [3]中兴通讯股份有限公司算法部南京团队,广东深圳518055 [4]移动网络和移动多媒体技术国家重点实验室,广东深圳518055

出　　处：《移动通信》2022年第1期84-90,共7页Mobile Communications

摘　　要：3GPP Rel-16版本对两步随机接入技术的信道结构和接入流程等方面做了增强设计,显著降低了随机接入过程中的时延、信令开销以及功耗。对两步随机接入空口增强技术进行阐述和研究,包括上行接收信号的定时偏移分析、基于串行干扰消除接收机的信号检测、上行接收波束优化与发送波束重选以及随机接入类型的自适应选择,同时对两步随机接入技术后续的演进发展进行了预测。An enhanced design for the two-step random access technology in terms of channel structure and access procedure has been made in the 3GPP Rel-16 specifications. The latency, signaling overhead, and power consumption are greatly reduced during the random access procedure. This paper elaborates and investigates the air interface enhancement technologies of the two-step random access, including the timing advance shift for uplink receiving signals, the signal detection based on successive interference cancellation receiver, uplink receiving beam optimization and transmit beam re-selection, and the adaptive selection of random access types. The further predictions have also been made for the development and evolution trends of this technology.

关 键 词：随机接入 异步传输 低时延 空口增强 

分 类 号：TN929.5[电子电信—通信与信息系统]