毕业论文：多媒体系统中基于号码分析的呼叫路由框架和实现.doc

硕士学位论文 多媒体系统中基于号码分析的呼叫路由框架的设计与实现 摘要 目前，多媒体系统已经应用到各个重要场合，各种各样的多媒体终端频频而出，从我们熟知的摄像机，监视器，电视墙，到现在的高清IPC等等，这些终端的发展，使得多媒体系统的功能也越来越强大了。然而，现有的多媒体系统不是很完善，还有着许多需要改进的地方,比如多媒体系统中服务器与终端之间的交互以及服务器本身之间的交互的恢复机制等。呼叫路由是多媒体系统的组成部分，旨在通过呼叫路由模块来找到各个终端和服务器的地址，以便完成服务器和终端之间的会话。本文基于对呼叫路由模块的实现，分别从多媒体系统的组网、传输协议、数据库等方面对多媒体系统进行分析，指出了多媒体系统的一些需要改进的地方和改进的方案。同时，本文为多媒体系统提供了一个独立的呼叫路由模块并完成呼叫路由模块数据库的设计、编码方案的设计和呼叫路由框架的设计。针对呼叫路由的框架，本文给出了呼叫路由模块的几个主要的数据结构和函数接口，以便进一步分析呼叫路由框架的实现过程。在呼叫路由模块的实现中，本文参考了电话交换网络中的号码分析的应用技术，为多媒体系统制订了一套基本的编码方案。基于本文设计的呼叫路由模块，本文还为多媒体系统的业务的恢复提供了相关的实现策略并给出了多媒体系统中业务恢复的实例。 关键词：　多媒体系统，终端，呼叫路由，号码分析，会话 Abstract At present, IP Multimedia Operating System has been applied to many important occasions , various multimedia terminals come out more and more frequently as we know, from the camera, monitor, TV wall, to the present high definition IPC, etc, these terminals’ development makes the multimedia system being stronger and stronger. However, the existing multimedia system is not perfect enough, there are many areas in need of improvement in the multimedia system, such as the recovery mechanism of the interaction between servers and terminals in the multimedia system or the interaction between servers itself. Call routing is a component of the multimedia system, aims to find out addresses of the various terminals and servers from visiting call routing module in order to finish the sessions between servers and terminals. This article suggests some areas in need of improvement and the improvement plan by analyzing the multimedia system in the points of the multimedia system’s networking, transfer protocol, database and so on which based on the realization of the call routing module. At the same time, this article provides a separate call routing module for multimedia system, completes the design for call routing module’s database, coding scheme and framework. According to the framework of the call routing module, this paper gives several main data structures and interface functions in order