VOIP语音网关的研究与硬件设计实现
摘要
我们知道，IP互联网已经成为新世界的基础。所有业务统一到IP网络，形成一个真正的综合业务网络是大势所趋。因而基于该网络的VOIP成为语音通信的发展方向。作为一种过渡性的终端设备，VOIP语音网关在传统的电话交换网络和IP网之间架起了一座桥梁，大大加快了VOIP的普及和发展脚步，有很好的商业价值。
本文第一章在回顾通信的各个里程碑式的发展阶段的基础上，介绍了VOIP的产生发展过程，揭示了其存在和发展的必然性，简述了VOIP语音网关在该领域的研究价值和意义，并探讨了国内外在该领域的研究现状。第二章从VOIP的承载网带来的问题引出并介绍了VOIP运用的一些关键技术。介绍了VOIP两种主要的信令协议。在此基础上，描述了基于H.323协议的VOIP系统组成和拓扑结构。第三章对VOIP语音网关的功能进行了详细的介绍，并给出了我们开发组设计的结构图。第四章为论文重点，分步骤地详细地介绍了语音网关各个组成器件的型号，功能特性，使用方法，硬件结构，接口方式等。力图通过详细的论述，系统地展现语音网关的硬件实现。最后，总结论述了硬件调试的一些经验。论文所阐述的内容已经经过实践的测试，依此所开发的VOIP语音网关已经在商用阶段。
As is known to all, IP-based Internet has become the foundation of the new world. It is the general trend that all services are converged to IP network, so as to shape a real integrated service network. As a result, VOIP that is based on such network has become the development direction of voice communication. As a transitional terminal unit, VOIP voice gateway has bridged between traditional PSTN and IP network, thus speedding up the step of VOIP development and popularization. At the same time ,VOIP voice gateway have prosperous commercial value. This text chapter 1 introduces the creation and the development process of VOIP in looking back the foundation of the development stage of the each milestone type of the communication, announcing to public its exist and develop inevitability, then,discuss the research value and meanings of VOIP voice gateway in that realm, and inquiried into the domestic research and present condition of outside that realm.Chapter 2 , from problem derivation bring from the VOIP loading net introduces some key techniques of the VOIP .Introduces two kinds of main protocol of VOIP .On this foundation, describes the composing and structure of VOIP system according to the H.323 protocol,Chapter 3 carries on the detailed introduction to the function of the VOIP voice gateway, and give our structure diagram of design. Chapter 4 is the thesis point, step by step introduces every part of VOIP voice gateway in detail, including the function characteristic, operation method, the hardware structure, interface conection etc... by the detailed treatise, emerging the hardware realization of the voice gateway systematically. In the end , the summary sums up some experiences about debug of the hardware. The contents that thesis already passes the test of the practice, the VOIP voice gateway depends on this to develop has already used in our living
本文第一章在回顾通信的各个里程碑式的发展阶段的基础上，介绍了VOIP的产生发展过程，揭示了其存在和发展的必然性，简述了VOIP语音网关在该领域的研究价值和意义，并探讨了国内外在该领域的研究现状。第二章从VOIP的承载网带来的问题引出并介绍了VOIP运用的一些关键技术。介绍了VOIP两种主要的信令协议。在此基础上，描述了基于H.323协议的VOIP系统组成和拓扑结构。第三章对VOIP语音网关的功能进行了详细的介绍，并给出了我们开发组设计的结构图。第四章为论文重点，分步骤地详细地介绍了语音网关各个组成器件的型号，功能特性，使用方法，硬件结构，接口方式等。力图通过详细的论述，系统地展现语音网关的硬件实现。最后，总结论述了硬件调试的一些经验。论文所阐述的内容已经经过实践的测试，依此所开发的VOIP语音网关已经在商用阶段。
As is known to all, IP-based Internet has become the foundation of the new world. It is the general trend that all services are converged to IP network, so as to shape a real integrated service network. As a result, VOIP that is based on such network has become the development direction of voice communication. As a transitional terminal unit, VOIP voice gateway has bridged between traditional PSTN and IP network, thus speedding up the step of VOIP development and popularization. At the same time ,VOIP voice gateway have prosperous commercial value. This text chapter 1 introduces the creation and the development process of VOIP in looking back the foundation of the development stage of the each milestone type of the communication, announcing to public its exist and develop inevitability, then,discuss the research value and meanings of VOIP voice gateway in that realm, and inquiried into the domestic research and present condition of outside that realm.Chapter 2 , from problem derivation bring from the VOIP loading net introduces some key techniques of the VOIP .Introduces two kinds of main protocol of VOIP .On this foundation, describes the composing and structure of VOIP system according to the H.323 protocol,Chapter 3 carries on the detailed introduction to the function of the VOIP voice gateway, and give our structure diagram of design. Chapter 4 is the thesis point, step by step introduces every part of VOIP voice gateway in detail, including the function characteristic, operation method, the hardware structure, interface conection etc... by the detailed treatise, emerging the hardware realization of the voice gateway systematically. In the end , the summary sums up some experiences about debug of the hardware. The contents that thesis already passes the test of the practice, the VOIP voice gateway depends on this to develop has already used in our living
引文
[1] Estrin D. Connecting the physical world with pervasive networks [J].
[2] 蔡安妮，孙景鳌．多媒体通信技术基础．北京：电子工业出版社，2000年1月
[3] IP网络多媒体通信技术黄永峰 人民邮电出版社
[4] 沈鑫剡 多媒体传输网络与VOIP系统设计 北京：人民邮电出版社
[5] 各元器件的用户手册
[6] 李驹光 ARM应用系统开发详解 清华大学出版社、
[7] 张仑32位嵌入式系统硬件设计与调试 机械工业出版社
[8] WIND RIVER著VXWORKS BSP开发人员指南
[9] 张登银VOIP技术分析和设计 人民邮电出版社
[10] VOIP的基本传输过程简介http://www.net130.com
[11] www.voip.spforum.net
[12] 王瑞刚 李燕 IP电话终端设备——原理、电路及应用 西安电子科技大学出版社
[13] 武全宇 基于OMAP5910的音频设计和实现
[2] 蔡安妮，孙景鳌．多媒体通信技术基础．北京：电子工业出版社，2000年1月
[3] IP网络多媒体通信技术黄永峰 人民邮电出版社
[4] 沈鑫剡 多媒体传输网络与VOIP系统设计 北京：人民邮电出版社
[5] 各元器件的用户手册
[6] 李驹光 ARM应用系统开发详解 清华大学出版社、
[7] 张仑32位嵌入式系统硬件设计与调试 机械工业出版社
[8] WIND RIVER著VXWORKS BSP开发人员指南
[9] 张登银VOIP技术分析和设计 人民邮电出版社
[10] VOIP的基本传输过程简介http://www.net130.com
[11] www.voip.spforum.net
[12] 王瑞刚 李燕 IP电话终端设备——原理、电路及应用 西安电子科技大学出版社
[13] 武全宇 基于OMAP5910的音频设计和实现