The IP Multimedia Subsystem (IMS), as the core control for fixed and mobile access, enhances network capabilities, by separating control functions from bearer and services.

IP多媒体子系统(IMS)作为固定接入和移动接入的统一核心控制网络，采用控制和承载、控制和业务相分离的机制，网络能力得到很大增强。

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IP Multimedia Subsystem (IMS) has been accepted as the core control platform of the 3g network. Its security problems are facing severe challenges now.

IP多媒体子系统(IMS)作为3g网络的核心控制平台，其安全问题正面临着严峻的挑战。

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