WebRTC系统中媒体子系统的设计与实现

发布时间：2018-06-07 14:49

本文选题：WebRTC + 实时通信　；参考：《北京邮电大学》2014年硕士论文

【摘要】：WebRTC (Web Real-Time Communications)是一种不依赖于第三方插件的由浏览器原生支持的实时音视频通信技术。作为一种新兴的web实时通信方式,WebRTC以其较低的开发维护成本,较高的用户体验,基于浏览器的跨平台特性以及标准化等优势受到业界的广泛关注。WebRTC技术的出现在对互联网实时通信应用产生变革的同时,对电信网实时通信业务也带来了机遇。实现WebRTC技术与IMS的结合,运营商可以将WebRTC的庞大潜在用户群、低开发维护成本、快速部署等优点应用在IMS的业务中,为用户提供更丰富的体验,促使传统用户向IMS网络迁移,创造巨大的商业价值。本文针对WebRTC系统中的媒体子系统进行设计和实现,意在基于WebRTC技术实现实时的音视频通信。媒体子系统具有两种应用场景,一种是在互联网架构中实现浏览器间的实时通信,另一种是实现浏览器WebRTC客户端与IMS网络终端间的媒体互通,尝试将WebRTC技术同IMS业务相结合。本文在对WebRTC标准化过程中的相关协议规范以及实现WebRTC系统涉及到的关键技术进行研究的基础上,从信令和媒体两个层面对媒体子系统在两种应用场景中的功能需求做出分析。在此基础上,本文给出了浏览器间媒体通信模块以及WebRTC客户端同IMS网络之间媒体互通模块的详细设计,并且介绍了通信网络的架构和通信业务的流程等。在互通场景中,本文着重介绍了媒体互通架构中的关键模块——媒体网关,该网关遵从ICE协议分别同WebRTC客户端和IMS网络终端建立P2P通信,并进行异构网络间媒体传输协议的转换,以中继的方式实现媒体流的互通。测试结果验证了媒体子系统实现的正确性和稳定性。
[Abstract]:WebRTC Real-Time Communications is a real-time audio and video communication technology that is not dependent on third-party plug-ins and is native to browsers. As a new way of web real-time communication, WebRTC has low cost of development and maintenance and high user experience. The cross-platform characteristics and standardization of browsers have attracted wide attention of the industry. The emergence of .WebRTC technology has brought about a revolution in the application of real-time communication over the Internet and an opportunity for real-time communication services in telecommunications networks. With the combination of WebRTC technology and IMS, operators can apply the advantages of WebRTC, such as large potential user group, low development and maintenance cost and rapid deployment, to IMS business, providing users with a richer experience and promoting traditional users to migrate to IMS network. Create great commercial value. In this paper, the media subsystem in WebRTC system is designed and implemented to realize real-time audio and video communication based on WebRTC technology. The media subsystem has two application scenarios, one is to realize the real-time communication between browsers in the Internet architecture, the other is to realize the media interworking between the browser WebRTC client and the IMS network terminal, and try to combine the WebRTC technology with the IMS service. Based on the research of the related protocol specification in the process of WebRTC standardization and the key technologies involved in the implementation of WebRTC system, this paper analyzes the functional requirements of the media subsystem in the two application scenarios from the two aspects of signaling and media. On this basis, this paper gives the detailed design of the media communication module between browsers and the media interworking module between WebRTC client and IMS network, and introduces the architecture of communication network and the flow of communication service. In the interworking scenario, this paper mainly introduces the key module of media interworking architecture, media gateway. The gateway establishes P2P communication with WebRTC client and IMS network terminal according to ICE protocol, respectively. The interworking of media flows is realized by relaying the media transport protocols between heterogeneous networks. The test results verify the correctness and stability of the media subsystem.
【学位授予单位】：北京邮电大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TP393.092

【参考文献】