軟交換呼叫控制技術

論文編號:TX420  論文字數:23220,頁數:53

摘     要
 軟交換技術是近年發展起來的一種新的呼叫控制技術， 具有開放的體系架構， 基于分組傳輸， 能夠提供多種接入方式等特點， 可以提供語音， 多媒體等多種實時業務， 已經逐漸成為電路交換向分組交換演進的主流技術。 從技術發展趨勢來看，電路交換將向以分組技術為基礎的軟交換演進，但在相當長的時間內電話交換網仍將與軟交換網絡共存。實踐證明，軟交換技術已趨于成熟，達到了組建商用網絡的技術條件要求。采用軟交換技術實現電路交換向分組交換演進是電話網發展的重要技術舉措。軟交換系統由多種設備組成，主要包括軟交換設備，中繼網關，信令網關，接入網關，媒體服務器，應用服務器等網絡側設備以及綜合接入設備(IAD )，SIP終端等終端側設備。
 本文結合X市實際情況，從市場競爭、業務發展、網絡結構與安全、業務能力、維護管理等幾個方面來闡述網絡轉型的必要性。而軟交換是下一代網絡的核心技術，是今后網絡發展的趨勢。
 全文可分為三個大部分:第一部分是本文的第一章。它首先介紹了下一代網絡的核心技術，從而引出網絡智能化的實施背景。再闡述X市網通本地網實施網絡轉型的必要性和可行性.
 第二部分是本文的第二章，它深層分析了網絡目前現狀和主要存在的問題，對可提供的業務類型進行分析。
 第三部分是第三、四章，它是本文的重點內容。先是對可能的建設方案進行比較，先擇可行的建設方案，先后闡述了軟交換網絡設計原則，網絡資源的規化等內容，并講述了網絡轉型完成后網絡的運營和維護。
 
關鍵字：網絡智能化；軟交換；下一代網絡
Abstract
 Softswitch is a new calling control technology that has been developed in recent years. It features the open architecture and the packet-based transmission while has the capability to support multiple access modes. It can offer multiple real-time services including voice and multimedia services, and gradually becomes a leading technology for the evolution of the circuit-based network to the packet-based NGN. Although the evolution of the circuit switching to packet-based Softswitch is a technical trend, the circuit-based network and Softswitch network will coexist for a long time.The fact is that the Softswitch technology is close to maturity, and the technologies for building a Softswitch commercial network have been prepared well. It is an important technical development of the telephone network to use the Softswitch technology to support the evolution of circuit switching to packet switching. The Softswitch system is composed of the network equipment and the terminal equipment.The former includes the Softswitch equipment,trunk gateway, signalling gateway, accessgateway, media server and application server.The latter has the Integrated Access Device(IAD), SIP terminal and more.
 This article unifies actual situation of X city Network, Elaborating the network intellectualization necessity from market competition, service development, network structure and security, professional ability, maintenance management and so on several aspects. The softswitch technology is core technology of the next generation network, it will be the next network development tendency.
 The full text may divide into three majorities: The first part contains the first chapter. It analyzes the main existence problem of X city Network and describes the main content of NGN. Then lead out the background of implementing network intellectualization and then analyzing the necessity and feasibility implementing network intellectualization.
 The second part is the second chapter. It analyes the situation of presently network and main existence problem of X city Network and the service type which the local network of X city Network can provide.
    The third part is the third and forth chapter.It is the key content of this article.it compares two possible construction projects first, then chooses a viable construction project.Successively elaborated softswitch network design principle, the rules of network resources turns etc.
Key words: Network intelligence;Softswitch technology;NGN

 目    錄
第一章 概述 1
1.1 項目提出的背景  1
1.2 下一代網絡核心技術剖析  2
1.3 網絡轉型的必要性  7
1.4 小結  9
第二章 業務及網絡發展現狀及分析  8
2.1 業務發展現狀及分析  8
2.2 網絡現狀分及分析  9
2.3 軟交換業務發展預測 11
第三章 軟交換網絡建設方案 19
3.1 網絡建設方案 19
3.2 設備能力需求計算 27
3.3 軟交換網元設置原則 31
3.4 軟交換網絡資源規劃 34
3.5 軟交換網對NGN承載網帶寬要求 36
3.6 網絡性能要求 38
3.7與長途NGN承載網的對接 40
第四章 NGN運營維護 41
4.1 NGN的運維特點 41
4.2 NGN與OSS的對接 41
4.3 業務發放北向接口 41
4.4 設備管理的分權分域 41
4.5 與支撐系統的接口建議 42
4.6 軟交換的運維體系 43
參考文獻   46
致謝  47