【作者】 高俊娜；

【导师】 潘雪增；

【作者基本信息】 浙江大学 ， 计算机应用， 2005， 硕士

【摘要】 当前随着通讯能力的不断提高,通讯业务的不断多样化,通讯架构中的核心网的IMS逐渐成为近几年的研究热点,焦点集中在研究如何使核心网络能够融合固网,移动网络;它包括应用需要的硬件、软件体系结构,网络架构,以及建立通用的安全计算平台。在网络融合的发展趋势下,IMS技术为基于IP的移动和固定通信融合提供了基础,并被业界认为是网络演进的一个重要阶段,IMS已经成为基于SIP会话的通用平台,它只有在满足固定和移动的多种接入方式需求后,才能实现固定网和移动网的融合。本文针对目前比较成熟的R5标准实现了IMS服务器功能,并对未来IMS的多个网络融合会引起的多域安全协商问题给出自己一个解决思路。具体工作包括:1) 详细阐述了IMS标准中架构,特别是SIP协议的相关方面。2) 描述了IMS中SIP协议的架构以及IMS中对于SIP的扩展性要求。3) 在1) 、2) 的基础上结合在公司中自己的工作,实现了IMS P-CSCF服务器功能。目前涉足IMS实现的组织和单位还很少,该系统在公司内部测试中获得良好的效果,它的实现为以后研究在多个网络融合中IMS的参考架构有了一定的实践基础,为以后的相关研究给出直接的验证,并最终实现一个融合固网,移动网(3GPP,3GPP2) 的多媒体通讯系统,为最终用户提供更灵活和有效的沟通方式。4) 在研究了IMS对安全的需求以及SIP协议的安全现状基础上,给出一个解决未来多域之间服务安全协商机制。该机制充分考虑了UA终端的资源限制,以及目前安全发展的趋势,增强了未来IMS安全协商的灵活性。更多还原

【Abstract】 Currently,along with the incresing of communication ability and application, IMS is becoming a hotspot in muti-domain integration. The focus is on the following aspects ,how to integrated mobile network and fixed network in core network. These include hardware , software and network framework which are needed in application. even include secure computation platform.With the trend of network integration, IMS technology is the base of integration between fixed network and mobile network based on IP mechanism, and it is considered to a very important stage in network evolvement. IMS technology has already become universal platform based SIP , so it has to sustain multiplication connection modes, implement integration of fixed network and mobile network.This paper realizes P-CSCF server in IMS following R5 standard, which is comparatively mature as to nowadays. And this paper also focuses on security aspect brought by integration between multi-IMS-domain. The details work include:1) expatiating IMS structure in detail, especially on SIP protocol and related aspects.2) describing SIP protocol structure in IMS and extending IMS requirement of SIP protocol.3) Based on (1) and (2) ,and my work in company,This paper realize the P-CSCF server in IMS.Currently, the organizations to implement IMS are few, and this server is tested within company soft switch products.By it, We can predigest IMS communication system , Also a good roadmap to IMS integration.4) After the research on IMS security requirement and SIP security , this paper advise a MUTI-DOMAIN security scheme ,it has a good deal with UA resource limited ,and security development trend increasing IMS’s security adaptability.更多还原