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首先简要介绍第三代通信技术(3G)发展过程,及第三代通信核心网网络结构,然后详细地描述了第三代通信核心网中的IP多媒体子系统(IMS)的组成和关键技术,同时对引入新的网络单元和接口进行了详细的描述。
First of all, the third generation communication technology (3G) development process and the third generation communication core network structure are briefly introduced. Then the composition and key technologies of IP Multimedia Subsystem (IMS) in the third generation communication core network are described in detail. At the same time, the introduction of new network elements and interfaces are described in detail.