本标准描述了进化分组系统（EPS）公共警报系统（PWS）在增强型无线紧急警报（eWEA）消息广播中的使用，包括将eWEA应用层消息映射到EPS中使用的小区广播中心（CBC）消息结构。本标准支持FCC报告和命令16-127以及FCC命令17-143的要求。

This Standard describes the use of the Evolved Packet System (EPS) Public Warning System (PWS) for the broadcast of Enhanced Wireless Emergency Alert (eWEA) messages and includes the mapping of eWEA application level messages to the Cell Broadcast Center (CBC) message structure as used within the EPS. This Standard supports the requirements of the FCC Report & Order 16-127 and the FCC Order on Reconsideration 17-143.