基于WiMAX的VOIP业务实现与研究
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摘要
近年来,Internet得到了飞速发展和普及应用,而作为其核心技术的IP协议体系在数据网络架构中的统治地位已得到了广泛认同。同时,随着基于IP技术上各种应用的提出,特别是VOIP技术的提出,使数据网络通信逐渐的融入了传统的话音业务领域。VOIP语音网关作为系统中的关键设备,为实现语音网和数据网的融合,向未来三网合一平稳过渡在VOIP系统中起着重要的作用。
     另一个重要的技术革新出现在无线通信领域,WiMAX技术凭借其在初期投资、业务承载与服务提供方面所具有的独特优势,已成为近期通信市场的一个热点。可见,研究基于WiMAX无线与Internet有线接入方式的VOIP语音网关具有较强的现实意义和应用价值。
     本文的主要内容是实现基于H.323协议,支持Internet有线接入方式的VOIP话音网关,详细阐述了支持4路话音的语音网关的设计及实现;通过学习研究WiMAX技术,选取WiMAX通信模块提出支持无线接入方式终端方案。
     本文的创新之处在于在实现、理解已有开发平台的基础上,提出支持WiMAX无线接入的解决方案,并且研究了网关的软件和硬件功能的设计与实现,并对VOIP的关键技术进行了研究。
     全文共分为5章,第1章介绍了VOIP应用现状,WiMAX通信技术和VOIP业务平台的发展趋势,分析了选题意义及应用前景。第2章主要阐述了VOIP关键技术。第3章研究WiMAX接入技术以及协议标准。第4章首先通过分析比较选取WiMAX模块,提出硬件解决方案。第5章详细介绍了Tornado软件开发平台,软件设计方法及其关键技术。并且说明了在软件测试过程中遇到的一些实际问题和解决方法。最后,总结了前期工作成果,并对项目开发进行了展望。
In recent years, Internet has made rapid development and wider application, as its core technology IP protocol in framework of the rule of position has been widely accepted. Meanwhile, with the IP-based technology to a variety of application, especially VOIP technology proposed, the data communications network gradually integrated into the traditional voice business. VOIP Voice Gateway as a system of key equipment for the voice network and data network integration, smooth transition to the future triple play in the VOIP system plays an important role.
     Another important emerging technological innovation in the field of wireless communications, WiMAX technology by virtue of their initial investment, business and service providers bearing made of the unique advantages of the recent communications market has become a hot spot. Clearly, based on the WiMAX wireless and wired Internet access in VOIP Voice Gateway has strong practical significance and value.
     The main content is based H.323 protocol support cable access the Internet VOIP voice gateway, detailed voice support for the four-way Voice Gateway Design and Implementation; through studying and researching WiMAX technology, select WiMAX communication module to support wireless access terminals programme.
     In this paper, the innovation lies in the realization and understanding of the development platform has been proposed on the basis of support WiMAX wireless access solutions, and on the gateway software and hardware design and implementation, and the key technology of VOIP were studied.
     The full text is divided into five chapters, Chapter 1 on the application of VOIP, WiMAX technology and communications platform for the development of VOIP business trends, topics of significance and application prospects. Chapter 2 introduces the main key to VOIP technology. Chapter 3 research WiMAX technology, as well as access protocol standard. Chapter 4 of the first selected through analysis and comparison WiMAX module, made hardware solutions. Chapter 5 details of the Tornado software development platform, software design method and its key technologies. And that the software encountered in the process of testing some of the practical problems and solutions. Finally, through summing up the preliminary results of the work, project development for the future.
引文
[1]Jonathan P.Castro UMTS网络与无线接入技术 电子工业出版社
    [2]张金文 802.16宽带无线城域网技术 电子工业出版社
    [3]蔡康 下一代网络(NGN)业务及运营 人民邮电出版社.
    [4]曾春亮 WiMAX/802.16原理与应用 机械工业出版社.
    [5]唐雄燕 宽带无线接入技术及应用—WiMAX与WiFi 电子工业出版社
    [6]葛利嘉 超宽带无线通信 国防工业出版社
    [7]廖日坤 ARM嵌入式应用开发技术白金手册 中国电力出版社
    [8]Wireless VOIP Phone Architecture and Hardware Requirements,Ali Riaz and Anthony Chan,San Jose State University,CA95192-0084,USA
    [9]WiMAX Operators Manual Building 802.16 Wireless Networks 2nd(2006)
    [10]王学龙 嵌入式VxWorks系统开发与应用 人民邮电出版社
    [11]Qing Li Real-Time Concepts for Embedded System 北京航空航天大学出版社
    [12]曲朝阳 软件测试技术 中国水利水电出版社