ETSI TS 103 269-2概述了关键用户使用的通用任务关键型服务的体系结构 宽带IP承载网络和终端中的通信应用，特别关注LTE。这个 体系结构是整体关键通信体系结构参考模型的一部分，如中所述 ETSI TR 103 269-1[1]。描述了总体架构和服务，以及服务的实现 相当于现有的窄带技术，例如TETRA和Tetrapol系统中的窄带技术。非网络 服务是为了将来的研究，因此不在本文件的范围内。

ETSI TS 103 269-2 presents an overview of the architecture for a generic mission critical service for use by a Critical Communications Application in network and terminal over a broadband IP bearer, with specific focus for LTE. The architecture is part of the overall Critical Communications Architecture Reference Model, described in ETSI TR 103 269-1 [1]. The overall architecture and services are described and the implementation of services equivalent to the existing narrowband technologies, for example those in TETRA and Tetrapol systems. Off network services are for future study and so are outside the scope of the present document.