3GPP is now carrying forward the development of the point to multipoint transmission mode of 5G on the basis of the cellular infrastructure and standard. Since the dedicated proposal for multimedia broadcast multicast system (MBMS) was approved, the MBMS technologies are evolving with the update of the requirements from 3G to 5G. This paper reviews the latest progress during the evolved MBMS standardization, which focuses on the LTE-based 5G terrestrial broadcast mode. Some agreements in terms of two widely discussed topics during 3GPP meetings, cell acquisition subframe (CAS) enhancement and numerology refinement, are presented. The enhancement of CAS and the update of numerology aim to deal with the service outage issue in the case of covering large area and serving high-mobility users. To verify the improvement brought by the CAS enhancement and the new numerology, simulations from system level and link level are carried out by several organizations and the representative results are presented and analyzed in this paper.

中文翻译：

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第 16 版中 5G 广播的物理层增强概述

3GPP现正在推进5G点对多点传输模式的发展，以蜂窝基础设施和标准为基础。自多媒体广播组播系统（MBMS）专用提案获得批准以来，MBMS技术随着需求从3G到5G的更新而不断演进。本文回顾了演进 MBMS 标准化过程中的最新进展，重点关注基于 LTE 的 5G 地面广播模式。提出了在 3GPP 会议期间就两个广泛讨论的主题、小区获取子帧 (CAS) 增强和数字命理学改进方面达成的一些协议。CAS的增强和命理学的更新旨在解决覆盖大面积和服务高移动性用户的情况下的服务中断问题。