Context-aware quality of service provisioning for real-time multimedia communications

实时多媒体通信的上下文感知服务质量

• 批准号: 227606-2007
• 负责人: ElMarakby, Randa
• 金额: $ 0.33万
• 依托单位: University of Windsor
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2007
• 资助国家: 加拿大
• 起止时间: 2007-01-01 至 2008-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=364914
• 关键词: Context; aware; quality; service; provisioning

The growing interest in continuous media (audio/video) services, namely media streaming and multimedia conferencing over IP, coupled with technological advances in wireless and mobile networking, present new challenges and opportunities for Quality of Service (QoS) provisioning. For example, some sports events are watched by millions of online users connected to the Internet in a variety of ways including high speed connections (Cable or ADSL), modems, or wireless connections. Accommodating such large number of continuous media users, network connection heterogeneity, and the different QoS requirements for multimedia applications represents significant challenges.       These challenges call for a new generation of QoS provisioning that takes into account the network and the application context to provide acceptable QoS. By incorporating contextual information in the QoS control process, it is possible to determine the reason for poor quality and take the most appropriate control action. Context information considered in this proposal include a variety of aspects including the location of a mobile device, the number of session users, the QoS requirements of the application, and the nature of the connection linking the user to the Internet.       The Real-time Transport Protocol (RTP) is commonly used to deliver real-time multimedia over the Internet. The associated Real Time Control Protocol (RTCP) provides control and feedback information necessary for QoS monitoring in RTP sessions. The proposed research aims at analyzing further enhancements to RTCP to integrate it in a context-aware framework in a scalable and effective way.       The impact of this work is to provide a comprehensive quantitative understanding of the fundamental issues involved in providing context-aware QoS. Another important outcome is the development of a prototype implementation of a scalable context-aware QoS control architecture for the global Internet of the 21st century.

人们对连续媒体(音频/视频)服务(即基于IP的媒体流和多媒体会议)的兴趣与日俱增，再加上无线和移动网络的技术进步，为服务质量(Qos)提供提出了新的挑战和机遇。例如，数百万在线用户通过各种方式连接到互联网观看某些体育赛事，这些方式包括高速连接(有线或ADSL)、调制解调器或无线连接。适应如此大量的连续媒体用户、网络连接的异构性以及对多媒体应用的不同的服务质量要求是一个巨大的挑战。他们认为，这些挑战需要考虑网络和应用环境的新一代服务质量提供，以提供可接受的服务质量。通过在服务质量控制过程中结合上下文信息，可以确定质量差的原因并采取最适当的控制措施。本提案中考虑的上下文信息包括多个方面，包括移动设备的位置、会话用户的数量、应用的服务质量要求以及将用户连接到互联网的连接的性质。关联的实时控制协议(RTCP)提供RTP会话中的Qos监控所需的控制和反馈信息。这项拟议的研究旨在分析RTCP的进一步增强，以便以可扩展和有效的方式将其集成到上下文感知框架中。他们表示，这项工作的影响是提供对提供上下文感知服务质量所涉及的基本问题的全面量化理解。另一个重要成果是为21世纪的全球互联网开发了可扩展的上下文感知Qos控制体系结构的原型实现。