目前电信市场的竞争日趋激烈,业务提供能力已成为各大通信运营商的主要 竞争力软交换灵活多样的业务提供方案,使得其业务提供种类及速度都比传统 方案有了质的飞跃;结合通信运营商的网络现状,分析业务需求,研究软交换的实 施方案,对提升企业的服务品牌,形成企业的核心竞争力有着重要意义 本文围绕电信软交换工程实施的可行性展开,主要研究的内容包括: 工程建设的必要性和可行性:首先分析了软交换发展的背景,软交换的涵 义,接着从通信业务发展的需要,外部竟争环境的需要,技术发展的规律等方面 得出建设软交换的必要性;又从资金来源,网络条件,外部环境等方面论证了工 程的可行性 软交换技术实现方式:本文从软交换技术的工作原理!业务实现方式!路由 策略!协议和信令等方面研究了组网原则并着重研究了怎样与现网的互联互 通!同步;怎样实现网络安全和QOS保证;怎样实现用户的多业务接入,这些 对指导工程实施有着重要意义 如何建设电信的软交换网:分析了电信建设软交换的目的和意义;针对电信 网络的现状以及存在的问题,并通过对用户数的预测和业务需求的预测,依据软 交换的技术实现方式,制定出了建设方案和建网的规模,解决了现网存在的问 题;研究了软交换建设面临的承载和业务实现问题,制定出了相应的承载网解决 方案,智能业务的解决方案 经济分析:通过财务评价,经济评价,得出此项目在经济上,财务上均可 行 关键词:软交换!智能业务!互联互通!网络安全!协议和信令 夕TheFeasibliiytStudyofTeleeomSotf一wStihcNewtokrConsturetion Abstract BeeauseofthestrongeomPetitionsofteleeommunieationmarketnowadays,the ProefssionalabilityhasbeeomeveryimPortantofrallteleeommunieationoPerators. 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Keywords:Sotfswitch,Intelligentsevriee,Networksaeft,yProtocolandsignal致谢 匆匆的三年研究生生活即将告一段落!衷心的感谢我的导师高隽教授 高老师治学态度严谨!工作作风踏实!学术思维开阔!知识渊博!见解独 到,高屋建领;高老师在领导科研团队中所表现出的卓越才能,令我深深的敬 佩;高老师的做人和做事的的作风让我受益匪浅,衷心的感谢高老师! 感谢研究生院和计算机与信息学院的领导和老师给予我的帮助和教诲!感谢 在课题研究过程中所有列出和未列出的被引用文献的作者! 一 2目录 第一章绪论................................................................................1 1.1软交换的发展背景................................................................1 1.2软交换的涵义......................................................................2 1.3建设软交换的必要性................................................,......4 1.4建设软交换网面临的问题......................................................5 1.5有关缩略语.........................................................................5 1.6本文内容安排......................................................................8 第二章电信软交换网工程建设的可行条件.....................................10 2.1资金来源..........................................................................10 2.2网络条件..........................................................................10 2.3局址条件.........................................................................10 2.4外部环境..........................................................................10 2.5技术准备..........................................................................11 2.6项目性质..........................................................................11 第三章建设软交换网的组网原则和技术要求..................................12 3.1建设目标和原则.................................................................12 3.1.1建设目标........................................................................12 3.1.2建设原则........................................................................12 3.2业务提供方式....................................................................13 3.3路由策略..........................................................................15 3.3.1路由技术........................................................................15 3.3.2路由的几种解决方案........................................................16 3.3.3路由方案分析.................................................................18 3.3.4路由方案选择.................................................................19 3.3.5IP网路由.......................................................................19 3 . 4网络互通..........................................................................19 3 . 4 . 1与交换网络的互通...........................................................19 3 . 4.2与IP网络的互通.............................................................20 3.4.3与IN网络的互通............................................................20 3.4.4与SIP网络的互通...........................................................21 3 . 4.5与PARLAY网关的互通........................................................21 3.5协议及信令.......................................................................22 3.5.1软交换设备的接口及协议..................................................22 3.5.2中继网关的接口及协议.....................................................263.5.3信令网关的接口和协议.....................................................26 3.5.4接入网关的接口和协议.....................................................26 3.5.5协议及信令的处理...........................................................26 3.6网同步.............................................................................28 3.7计费和网管.......................................................................28 3.7.1计费..............................................................................28 3.7.2网管..............................................................................28 3.8网络安全..........................................................................28 3.8.1语音数据的保密............,...........................................29 3.8.2审计机制........................................................................29 3.8.3安全监控旧志功能..........................................................29 3.8.4设备自身的安全性措施.....................................................29 3.8.SBAS网络安全控制措施.....................................................29 3.9承载网QOS及实现方式.....................................................30 3.10用户接入....,............,...........................................32 3.10.1语音业务接入...-......................................................32 3.10.2用户接入技术................................