软交换作为下一代网络的核心技术，受到业界的普遍关注。
Soft switch, as the core technology of NGN is drawing the industry's attention.
软交换为下一代网络提供实时性的业务呼叫控制和连接控制，是下一代网络的核心设备之一。
As one of the core equipment of NGN, the soft-switch provides the controls of real-time call service and connections for NGN (the next generation network).
NGN现在是通信领域的一大热门话题，在下一代网络的组成元素中，软交换是一个重要组件，是新老网络实现融合的枢纽。
NGN is a hot topic in Communication Area now. SoftSwitch is an important component in next generation network and the convergent center of the new and old network.
本文介绍了下一代网络的概念和功能模型，以及其核心技术——软交换技术；
The paper firstly introduces the conception and function model of NGN, and describes the key technology of NGN, Soft Switch.
软交换是NGN的控制功能实体，为NGN提供具有实时性要求的业务呼叫控制和连接控制功能，是NGN呼叫与控制的核心。
The Softswitch is the the NGN control function entity, it provides the call and connect control function to timely request service for NGN, and is the call and the control core in NGN.
SIP协议已逐步成为下一代网络(NGN)的多媒体软交换系统和第三代移动通信(3 G)多媒体子系统域中的重要协议。
SIP gradually becomes the important protocol in the multimedia Softswitch system and 3g multimedia subsystem area of the next generation network (NGN).
软交换是NGN的关键技术，在传统的电信交换网络中，引入软交换技术进行网络的优化和演进是必然趋势。
SS (Soft Switching) technology is the key technology of NGN. It is inevitable trend to apply it in traditional telecom network.
软交换作为NGN的核心实体，为下一代网络提供具有实时性要求的业务呼叫控制和连接控制功能。
Softswitch is core entity of NGN, which functions real-time service control, call control and connect control.
软交换和下一代网络是近年来学术界和通信领域研究的热点之一。
Recent years Softswitch and NGN have become research hotspots in academic and telecommunication areas.
其次，对SIP这个NGN软交换的核心协议进行深入的研究，分析SIP消息包的结构，理解SIP协议中规定的通信连接流程和状态机维护过程，建立了一个遵循协议规定的SIP协议栈模型。
Soft Switch and SIP that is mainstream application protocol in NGN are studied. The structure of SIP message and process of building connection are introduced, a SIP stack model is set to program.
下一代网络将是业务驱动的网络，因此作为下一代网络的核心技术，软交换系统应具备强大的业务能力。
Next generation network(NGN)is a service-driven one. As the central part of NGN, SoftSwitch should possess powerful service capabilities.
从ngn的总体目标和需求分析入手，着重介绍ngn的概念、软交换、媒体网关控制技术等各种关键技术。
It from the analyses of overall goal and demand of NGN, mainly introduces the concept of NGN, and the key technologies of soft-switch, media gateway control technology of NGN etc.
文章根据NGN的业务相关特点详细阐述了利用软交换技术实现NGN业务体系功能目标的方法。
This thesis illustrates the methods of realizing the NGN function with the SoftSwitch technology based on the service related features of NGN.
文章根据NGN的业务相关特点详细阐述了利用软交换技术实现NGN业务体系功能目标的方法。
This thesis illustrates the methods of realizing the NGN function with the SoftSwitch technology based on the service related features of NGN.
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