IMS网元互通和系统构建研究

发布时间：2018-03-07 14:00

本文选题：IP多媒体子系统　切入点：会话初始协议　出处：《吉林大学》2014年硕士论文　论文类型：学位论文

【摘要】：为了支持IP多媒体业务，第三代移动通信伙伴组织（3GPP）在Release5中提出了IP多媒体子系统（IMS），这个系统的提出改变了人们对传统网络的认知。基于会话初始化协议（SIP）的IMS网络体系，具有网络的控制与业务分离、业务与承载分离、业务开发灵活、接入无关性等特点。用户通过基于SIP的IMS网络，可以不受使用终端和使用网络的限制，随时随地的接入获得相同的通信业务服务。当前电信市场竞争日益激烈，，客户需求不断变化，电信运营商的工作重点由提升用户规模向提高网络能力、丰富通信业务种类转变。为适应通信网络的发展，提升企业的市场竞争力，降低网络的运行成本，电信运营商进行移动与固定网络融合研究，IMS是关键技术。IMS网络扁平化的网络结构、强大的网络能力、丰富的通信业务服务、灵活的网络接入，满足电信运营商未来通信网络部署的需求。近年来，国内外各大电信运营商都将IMS网络作为优化网络资源、提升网络业务能力的手段。电信运营商最初进行IMS网络内场测试，对IMS网络、业务、终端、支撑等方面进行测试研究，验证了IMS网络能力，制定自己企业的IMS网络标准规范，后来通过对IMS网络的外场测试实验，进一步研究IMS网络构建的可行性。考虑到未来通信网络的发展，研究现有网络向IMS网络演进的方案，对电信运营商有着十分重要的意义。本文首先介绍课题的研究背景、研究意义和目的以及国内外研究现状。然后介绍了IMS的相关技术，包括IMS简介、IMS网络结构、IMS主要网元以及SIP协议在IMS中的作用，研究IMS网元互通。结合辽宁联通现有固定网络的现状及存在的问题，研究了基于固网改造的IMS网络的构建。设计的与现有固网互通的IMS网络构建方案，主要包括IMS基本网络架构、业务模型、主要网元设置、网络规模预测以及核心网元的容灾方式等方面的内容。研究IMS网络应用服务器（AS）的设置方案，实现对所有固网业务的继承。本次研究IMS网络与固定网络的语音直接互通，而IMS网络与其他电路域网络的互通是通过固网汇接局转接实现的。根据网络互通原则，分析IMS网络与现网语音互通的路由计划，通过IMS语音呼叫测试，证实语音互通的路由计划，实现了与现有网络的语音互通，证明了本次研究的IMS网络构建方案是切实可行的。本次研究的IMS网络构建方案，考虑了现阶段电信运营商网络改造的要求与业务发展的需求，实现电信网络发展的目标，为电信运营商IMS网络的建设实施提供了参考。
[Abstract]:In order to support IP multimedia service, the third generation mobile communication partner organization (3GPP) put forward the IP multimedia subsystem in Release5. This system has changed people's cognition of traditional network. The IMS network system based on session initialization protocol (SIP). It has the characteristics of network control and service separation, service and load separation, flexible service development, access independence and so on. Through the IMS network based on SIP, users can not be restricted by the use of terminal and network. At present, the competition in the telecommunication market is becoming increasingly fierce, the customer demand is constantly changing, the focus of the telecom operators is from increasing the scale of users to improving the network capability. In order to adapt to the development of communication network, enhance the market competitiveness of enterprises and reduce the running cost of the network, Research on Mobile and fixed Network Fusion of Telecom operators IMS is the key technology. IMS is a flat network structure strong network capability rich communication services flexible network access. To meet the needs of telecom operators in the future communication network deployment. In recent years, the major telecom operators at home and abroad have taken the IMS network as a means to optimize network resources and enhance the network service capability. Telecom operators initially conducted IMS network internal field testing, to IMS networks, services, terminals, Through the test research in support and other aspects, the IMS network capability was verified, and the IMS network standard specification of its own enterprise was established. Later, through the external field test experiment of IMS network, Considering the development of future communication networks, it is of great significance for telecom operators to study the evolution of existing networks to IMS networks. This paper first introduces the research background, significance and purpose of the project, and the current research situation at home and abroad, and then introduces the related technologies of IMS, including the introduction of IMS network structure and the role of SIP protocol in IMS. This paper studies the interworking of IMS network elements. Combined with the present situation and existing problems of Liaoning Unicom's fixed network, the paper studies the construction of IMS network based on fixed network transformation, and designs the construction scheme of IMS network with existing fixed network interworking. It mainly includes IMS basic network architecture, service model, main network element setting, network scale prediction, disaster recovery mode of core network element, and so on. This paper studies the setup scheme of IMS network application server and realizes the inheritance of all fixed network services. This paper studies the direct voice interworking between IMS network and fixed network. The interworking between IMS network and other circuit-domain networks is realized through the transfer of fixed network converters. According to the principle of network interworking, the routing plan of voice interworking between IMS network and existing network is analyzed, and the test of IMS voice call is carried out. The routing plan of voice interworking is confirmed, the voice interworking with existing network is realized, and the IMS network construction scheme of this study is proved to be feasible. Taking into account the requirements of network transformation and service development of telecom operators at present, the paper realizes the goal of telecom network development, and provides a reference for the construction and implementation of IMS network of telecom operators.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN919.8

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