IMS大话务呼叫仿真设计与实现_毕业论文.doc

PAGE I PAGE I 编 号： 审定成绩： 重庆邮电大学 自考本科毕业论文 专 业： 通信工程 论文题目：IMS大话务呼叫仿真设计 与实现 PAGE \* MERGEFORMAT - PAGE \* MERGEFORMAT - 2 - 摘要 为了显著提高3G网络提供增值业务的能力和推动移动网络和固定网络融合，电信业界一直都在关注是否可以设计出一种业务能力更强的网络结构。因此IMS(IP多媒体子系统)应运而生，它是3GPP在Release 5版本中提出的支持IP多媒体业务的子系统，而基于IP的多媒体业务将成为通信业务的重要部分。 IMS是一个独立于接入技术基于IP的体系架构，公认为是融合固网、移动网（2G/2.5G/3G）、互联网的核心技术，是基于电信重组后业务运营商构建其核心网的必选技术。SIP是一种基于文本，简单、灵活、易扩展的应用层协议。同时3GPP规定SIP（会话初始化协议）作为IMS系统的所有业务的信令协议，从协议层面上保证了业务和承载相分离。IMS业务仿真软件具有良好的用户界面，操作方便，能够模拟基于IMS的SIP消息、会话流程以及模拟大量用户在短时间内发起语音呼叫，对于IMS网络设备进行一致性、功能性和压力测试。 本文重点针对IP多媒体子系统的特点设计了业务仿真系统，基于SIP协议仿真的理论和方法。 【关键词】：IMS SIP PoC 业务仿真系统 测试仪 ABSTRACT To provide more kinds of Services and drive the combination of fixed network and mobile network,we are looking for a new network structure,So 3GPP designed the IO Multimedia Sub system(IMS) in Release 5 to satisfy the needs,which is considered as the most suitable solution to Next Generation Network. IMS,an IP-based network architecture independent of access technology,has generally recognized as the core technology for the fixed, mobile(2G/2.5G/3G) and Internet,and also required technology for building reorganized core network for full service telecommunication operator. SIP is a text-based, simple, flexible and expandable protocol of application layer. And SIP is defined as signaling protocol of IMS network by 3GPP,which separates services form bearers.IMS service simulation software has the user-friendly interface with easy operation,and can simulate the IMS-based SIP message,session flows and initiation of voice calls from a great many users in a short time,and carry out tests of consistency,function and pressure for IMS network equipment. This paper focused on the feature of the IMS,achieved several tasks below, which based on the principle of SIP emulator. 【Key words】：IMS SIP PoC Service Emluator PAGE \* MERGEFORMAT